| RENISHAW PLC Patent applications |
| Patent application number | Title | Published |
|---|
| 20120072170 | VISION MEASUREMENT PROBE AND METHOD OF OPERATION - A method of operating a vision measurement probe for obtaining and supplying images of an object to be measured. The vision measurement probe is mounted on a continuous articulating head of a coordinate positioning apparatus, and the continuous articulating head having at least one rotational axis. The object and vision measurement probe can be moved relative to each other about the at least one rotational axis and in at least one linear degree of freedom during a measuring operation. The method includes: processing at least one image obtained by the vision measurement probe to obtain feedback data; and controlling the physical relationship between the vision measurement probe and the object based on said feedback data. | 03-22-2012 |
| 20120072169 | POSITION MEASUREMENT ENCODER AND METHOD OF OPERATION - A method of operating a position encoder apparatus, including a scale having features defining position information and a readhead for reading the scale. The method includes: calculating extrapolated position information from at least one previous reading of the scale; comparing an extrapolated position with a position calculated from a reading of the scale to determine any discrepancy between them; using the extrapolated position information whether or not there is a discrepancy; and maintaining a record of any discrepancies. | 03-22-2012 |
| 20120060385 | Apparatus and method of measuring workpieces - A method and apparatus for measuring a surface using a surface sensing device mounted on a scanning head on a member of a coordinate positioning apparatus. The coordinate positioning apparatus may be operated to produce relative movement between the scanning head and the surface profile and the scanning head includes a drive for producing rotational movement of the surface sensing probe about one or more axis. The coordinate positioning apparatus is driven to provide relative movement between the member and the surface profile in a circular path and the scanning head is driven to move the surface sensing device about said one or more axes, such that the surface sensing device maintains a nominally constant lead angle. The motion of the coordinate positioning apparatus and scanning head is synchronous. | 03-15-2012 |
| 20120041740 | DIGITISATION OF DENTAL PARTS - The surface of a dental part is scanned by a probe, to obtain a digital model of the surface in a dental CAD computer system. In the digital model, first and second boundary lines are defined, above and below a portion in which the scanned data is missing or unsatisfactory. One of the boundary lines may correspond to a margin line between prepared and unprepared portions of the patient's tooth. A transition surface is generated in the computer system, extending between the first and second boundary lines. This improves the representation of the dental part in the digital model, which may subsequently be used for manufacture of a dental restoration. | 02-16-2012 |
| 20120025812 | POSITION ENCODER APPARATUS - A scanning device for a position encoder is provided that comprises a plurality of sensor elements for generating a plurality of sensor signals. A summation unit is also provided for generating at least a first summation signal and a second summation signal that provide information on the relative alignment of the scanning device and an associated scale. The first summation signal is generated from a first subset of the plurality of sensor signals and the second summation signal is generated from a second subset of the plurality of sensor signals. The plurality of sensor elements are substantially evenly spaced apart from one another N and sensor elements are provided per period of an associated scale, wherein N is an integer value and a multiple of three and four. In this manner, the third harmonic contribution to the summation signals is suppressed. | 02-02-2012 |
| 20120025066 | POSITION ENCODER APPARATUS - A position encoder kit, including: a scale comprising a series of position features; and a readhead. The readhead includes a detector for receiving configuration information from a configuration item. The readhead is configured to operate in accordance with the configuration information. The readhead also includes a receiver interface via which the readhead can supply position information to a receiver. | 02-02-2012 |
| 20120007980 | POSITION ENCODER APPARATUS - A position encoder apparatus, including a scale having a series of position features; and a readhead configured to read the series of position features via a snapshot capture process. The snapshot capture process is adaptable so as to compensate for the relative speed between the scale and readhead. | 01-12-2012 |
| 20110316566 | APPARATUS AND METHOD FOR DIGITISING IMPEDANCE - An apparatus for digitising an impedance is provided that comprises a first impedance element having a first impedance that varies with a property to be measured and a second impedance element having a second impedance. The apparatus also includes a drive signal generator for applying a first alternating drive signal to the first impedance element and a second alternating drive signal to the second impedance element. An analogue-to-digital converter, ADC, receives a resultant signal comprising the combination of the signals produced by the application of the first and second alternating drive signals to the first and second impedance elements. The first alternating drive signal is phase shifted relative to the second alternating drive signal such that the resultant signal received and sampled by the ADC sequentially relates to the sum of, and the difference between, the first and second impedances. The apparatus also comprises a signal separator that receives sample values from the ADC and generates a sum channel and a difference channel therefrom. | 12-29-2011 |
| 20110316527 | ENCODER READHEAD - A readhead is provided for reading an absolute scale, optionally a passive magnetic scale, that encodes a series of data bits. The readhead includes a plurality of sensors, such as an array of Hall sensors, for producing a plurality of sensor signals. A plurality of signal combiners are also provided to receive at least two of the sensor signals and produce therefrom a combined sensor signal. A plurality of data bit extractors are arranged to receive at least two combined sensor signals and to determine the value of a data bit encoded in an associated absolute scale. The readhead also comprises an incremental signal generator for generating at least one incremental signal from the combined sensor signals produced by a plurality of the signal combiners. In this manner, both absolute and incremental position is measured. | 12-29-2011 |
| 20110291343 | BILLET AND CORRESPONDING BILLET HOLDER - A billet holder comprising a base and a frame is described. The base and frame are connectable, and when connected are relatively moveable between an open configuration when a billet may be inserted or removed from the billet holder and, a closed configuration when a billet is retained within the billet holder. A billet for being retained within a billet holder, said billet having one or more orientation feature, is also described. The billet may have essentially a D-shape. Further described is a method of manufacture of an article from a billet. | 12-01-2011 |
| 20110283553 | Method for scanning the surface of a workpiece - A measurement system has a surface sensing device mounted on an articulating probe head, which in turn is mounted on a coordinate positioning apparatus. The surface sensing device is moved relative to a surface by driving at least one of the coordinate positioning apparatus and probe head in at least one axis to scan the surface. The surface sensing device measures its distance from the surface and the probe head is driven to rotate the surface sensing device about at least one axis in order to control the relative position of the surface sensing device from the surface to within a predetermined range in real time. | 11-24-2011 |
| 20110277534 | Method of error compensation in a coordinate measuring machine - A method of calibrating an articulating probe head comprising the steps of measuring an artefact of known dimensions with the workpiece sensing probe mounted on the articulating probe head, in which the articulating probe head is unlocked. An error functional map is generated corresponding to the difference between the measured and known dimensions of the artefact. Subsequent workpieces are measured with the articulating probe head unlocked and the corresponding correction applied. The true dimensions of the artefact may be determined by measuring it with a probe mounted on an articulating probe head in which the axes of the articulating probe head are locked. A mechanical lock is provided to lock the axes of the articulating probe head. | 11-17-2011 |
| 20110276303 | METHOD FOR OPTIMISING A MEASUREMENT CYCLE - A method is described for calculating an optimum stand-off distance for surface position measurements to be acquired by a coordinate positioning apparatus including a measurement probe. The coordinate positioning apparatus may include a machine tool and the measurement probe may include a touch trigger probe having a deflectable stylus. The method includes the step of calculating an optimum stand-off distance using at least one measured acceleration characteristic of the coordinate positioning apparatus. In this manner, measurement cycle times may be optimised. | 11-10-2011 |
| 20110273702 | OPTICAL MEASURING METHOD AND SYSTEM - A detecting system for detecting flaws in a sample includes an illumination assembly and detecting assembly. The illumination assembly has an infra-red light source and illumination optics for directing a beam of light from the light source to a spot on or within a sample. The detection assembly has a detector for detecting light from an illuminated spot on or within a sample and detection optics for directing light from an illuminated spot on or within a sample to the detector. Such a system may be used for determining flaws in a sample such as a thermal barrier coating on a turbine blade, or a dental or other medical part. In particular the system may be used for determining flaws in a ceramic sample. A method for detecting flaws in a sample is further described. | 11-10-2011 |
| 20110273166 | MAGNETIC ENCODER SCALE - An encoder scale is a piston rod for use in a pneumatic or hydraulic cylinder. The method includes the steps of providing a mask defining a required groove pattern on an encoder scale member that is formed from a first material (e.g. steel) and etching material from the encoder scale member, through the mask, to form a plurality of grooves in the outer surface of the encoder scale member. A second material such as copper is then deposited on to the encoder scale member to substantially fill the grooves, the second material having a different magnetic permeability than the first material. A machining process (e.g. grinding) is then used to remove any excess second material and thereby provide an encoder scale member having a substantially smooth outer surface. A step of coating the outer surface of the encoder scale member with a metal, such as chronium, is then performed. | 11-10-2011 |
| 20110271540 | ENCODER SCALE MEMBER AND METHOD FOR MOUNTING - A coordinate positioning apparatus is described. The coordinate positioning apparatus comprises a mounting surface, a motion guide mountable on the mounting surface, a first member comprising a sensor for sensing scale markings, the first member being mountable on the motion guide, and an encoder scale member comprising a first set of scale markings which are, in use, sensable by the sensor. At least part of the encoder scale member is retained between the mounting surface and the motion guide such that the encoder scale member is supported by the mounting surface at least in the vicinity of the first set of scale markings. The motion guide may be a guide rail or a bearing, for example. En encoder scale member for use with such a coordinate positioning apparatus is also described. | 11-10-2011 |
| 20110267043 | MAGNETIC ENCODER APPARATUS - A magnetic scale includes a scale member having a plurality of grooves. The scale member defines a passive magnetic scale track. The plurality of grooves include grooves of at least a first groove type and a second groove type, the magnetic properties of the scale member in the locality of grooves of the first groove type being different than the magnetic properties of the scale member in the locality of grooves of the second groove type. The scale member is arranged to carry or encode absolute position information in the form of at least one codeword comprising a sequence of data bits, wherein each of the data bits is provided by a groove of the scale member, the data bit taking a first value if the groove is of the first groove type and a second value if the groove is of the second groove type. | 11-03-2011 |
| 20110264402 | COURSE OF MOTION DETERMINATION - A computer-implemented method for determining a course of motion between an artefact ( | 10-27-2011 |
| 20110243160 | FREQUENCY TUNEABLE LASER DEVICE - A frequency tuneable or chirped laser device is described that includes a laser cavity formed from a plurality of optical components. The optical components include a laser source for generating a beam of light, a spectral tuning element and one or more further optical components for directing the beam of light on to the spectral tuning element. At least one of the plurality of optical components is moveable in a first degree of freedom; such movement simultaneously altering the effective optical path length of the laser cavity and the tuning frequency of the spectral tuning element. The effective optical path length and the tuning frequency of the device are substantially insensitive to any movement of said at least one moveable optical component in degrees of freedom other than the first degree of freedom. This provides frequency tuning in which mode hopping is suppressed. | 10-06-2011 |
| 20110198790 | APPARATUS FOR MOUNTING AN ACCESSORY TO A COORDINATE POSITIONING APPARATUS - An apparatus for mounting a coordinate positioning apparatus accessory, such as a tool setter, to the workpiece mounting surface of a coordinate positioning apparatus, the workpiece mounting surface having a slot formed in it. The apparatus includes an insert for inserting into the slot of the workpiece mounting surface, and a mount attachable to a coordinate positioning apparatus accessory. The insert includes structure to fix the insert within the slot; the insert is substantially contained within the slot when inserted therein. The mount includes at least one protruding member for engaging the insert when contained within the slot, thereby fixing the mount, and therefore any coordinate positioning apparatus accessory attached to the mount, to the workpiece mounting surface of the coordinate positioning apparatus. | 08-18-2011 |
| 20110192042 | APPARATUS AND METHOD FOR CONTROLLING OR PROGRAMMING A MEASUREMENT ROUTINE - A method and apparatus for controlling or programming a measurement path for a probe mounted on a coordinate positioning apparatus (e.g. an articulating probe head mounted on a CMM) which enables both the position of the probe tip and the orientation of the probe to be varied. In a first mode, the position of the probe tip is adjusted. In a second mode the orientation of the probe is adjusted, whilst keeping the location of the probe tip unchanged. This may be achieved either online on the coordinate positioning apparatus or offline in software. | 08-11-2011 |
| 20110184695 | MEASUREMENT METHOD - This invention relates to a method for measuring a feature of an object that comprises obtaining a representation of at least the feature on the object by acquiring multiple data points via surface measurement of at least the feature. A model substantially replicating at least the feature of the object is fitted to the representation. The model comprises parameters defining at least two independently alterable portions that are linked at a common point. The fitting comprises changing the form of the model by altering at least one of the at least two independently alterable portions. The method also comprises obtaining information regarding at least the feature from the fitted model. | 07-28-2011 |
| 20110181715 | BACKLIT VISION MACHINE - A back-lit vision machine apparatus is described that includes an imaging sensor for imaging an object. A radiation source for generating radiation having a first property and a radiation converter for converting radiation having the first property into radiation having a second property are also provided. The radiation source is arranged to project radiation having the first property onto the radiation converter thereby producing radiation having the second property, whilst the radiation converter is arranged to illuminate an object to be imaged by the imaging sensor with radiation having the second property. An object to be imaged is locatable between the radiation converter and the imaging sensor and such an object is thus back-lit by radiation having the second property produced by the radiation converter. The radiation source is arranged to project radiation having the first property onto the object to be imaged and onto the radiation converter. | 07-28-2011 |
| 20110173832 | ABSOLUTE ENCODER SETUP INDICATION - This invention relates to a method of operating an absolute encoder apparatus comprising a scale having features defining absolute position information in at least one measuring dimension, and a readhead configured to read the features. The method comprises: obtaining at least one representation of at least some of the features defining absolute position information; analysing the at least one representation to determine at least one parameter indicative of the quality of the representation; and providing an output indicative of the relative setup of the scale and readhead based at least in part on the at least one parameter. | 07-21-2011 |
| 20110162223 | SCALE TRACK - A metrological scale track comprising at least first and second metrological scale track strips. The at least first and second metrological scale track strips are held in a spaced apart relationship by at least one spacer. The at least one spacer is configured to be removed once the at least first and second metrological scale track strips have been secured to a substrate. | 07-07-2011 |
| 20110061253 | Articulating probe head apparatus and method - Apparatus for a co-ordinate positioning machine is described that comprises an articulating probe head for supporting a measurement probe. The articulating probe head comprises at least one electric motor. Heating means are provided for generating heat in the articulating probe head. The heating means may be the motors or discrete heating elements. Temperature sensing means, such as one or more temperature sensors, is also provided for determining the temperature at the articulating probe head. The apparatus allows the temperature of the articulating probe head to be controlled. | 03-17-2011 |
| 20110058159 | OPTICAL INSPECTION PROBE - An optical inspection probe for obtaining and providing images of an object to be inspected. The optical inspection probe comprises an imaging assembly for capturing an image of an object and an illumination assembly for producing a light beam directed toward the object. The optical inspection probe is configured such that the light beam converges to a focal point at a first focal plane. | 03-10-2011 |
| 20110056074 | APPARATUS AND METHOD FOR ELECTRONIC CIRCUIT MANUFACTURE - An apparatus and method are described for use in the manufacture of non-planar circuit modules. The apparatus includes a holder for holding a non-planar circuit module, an activation source for activating one or more localised regions of a non-planar circuit module held by the holder, and positioning apparatus for providing relative movement between the activation source and a non-planar circuit module held by the holder. The relative movement between the activation source and a non-planar circuit module held by the holder includes translational movement along at least one axis and rotational movement about at least one axis. A parallel positioning machine may provide such relative movement. | 03-10-2011 |
| 20110043827 | Surface sensing device with optical sensor - A surface sensing device for use in position determining apparatus has an elongate stylus with a tip for scanning the surface of a workpiece to be measured. Lateral displacements of the stylus tip are detected by a light beam which passes along the stylus from a light source to a retroreflector. This reflects the beam back via a beamsplitter to a position sensitive detector. The stylus is mounted for longitudinal displacement on a carriage. The longitudinal displacement is measured by another light beam projected by the beamsplitter onto a second position sensitive detector. | 02-24-2011 |
| 20110024022 | METROLOGICAL SCALE - A method of applying a marking onto a metrological scale. The method comprises locating one or more markings on the scale substrate in a provisional state; checking whether the one or more markings located on the scale substrate are acceptable; and finalising the one or markings which are acceptable so as to transform the one or more markings into a finalised state. | 02-03-2011 |
| 20110016995 | MODULE OR TOOL CHANGING FOR METROLOGICAL PROBE - Apparatus is disclosed for changing task modules or styli of a metrological probe. In one embodiment, a stylus module ( | 01-27-2011 |
| 20110006771 | MAGNETIC RESONANCE APPARATUS AND METHOD - Magnetic resonance apparatus, e.g. for magnetic resonance imaging, is described that includes a cooler unit and one or more radio-frequency (RF) coil assemblies. A separable thermal connection is provided between the cooler unit and the one or more RF coil assemblies. This separable thermal connection allows the one or more RF coil assemblies to be detached from the cooler unit after the one or more coil assemblies have been cooled to the required operating temperature. Each RF coil assembly can then be used for magnetic resonance imaging or the like. A plurality of different RF coil assemblies may thus be cooled by a single cooler unit. | 01-13-2011 |
| 20110004437 | TOUCH TRIGGER MEASUREMENT PROBE - A measurement probe, for a co-ordinate positioning apparatus such as a machine tool, is described that includes a stylus holder that is deflectably mounted to a probe housing. One or more sensors are provided for sensing deflection of the stylus holder relative to the probe housing. A processor is included for producing a trigger signal when the deflection sensed by the one or more sensors meets a trigger condition, such as a deflection threshold. The probe also includes an accelerometer for measuring acceleration of the measurement probe. The trigger condition applied by the processor is alterable, during use, in response to the acceleration measured by the accelerometer. In this manner, false triggering can be suppressed. | 01-06-2011 |
| 20110002361 | Signal transmission system for a measurement device - A transmission system for a measurement device on a coordinate positioning apparatus comprises a station mounted on the measuring device and another station mounted on the coordinate positioning apparatus, wherein the station and the another station communicate with each other using a spread spectrum radio link, for example, frequency hopping. The station on the probe sends a regular signal and on receiving the signal the another station on the coordinate positioning apparatus synchronises its clock and sends an acknowledgement signal. Measurement data is either sent in the regular signal or in a measurement event driven signal. | 01-06-2011 |
| 20110000076 | INDEXER - This invention relates to an indexer for providing rotation of a part from a first index position to a second index position. The indexer comprises an indexer frame and a part for rotation. The indexer frame has at least one index feature, and the part has at least one index feature, wherein the at least one index feature on the indexer frame is co-operable with the at least one index feature on the part so as to provide two or more index positions of the part with respect to the indexer frame. In use the part locates with the indexer frame so as to form an axis about which the part is able to rotate relative to the indexer frame, the axis being kinematically located. | 01-06-2011 |
| 20100327014 | APPARATUS AND METHOD FOR FLUID DISPENSING - An apparatus and method are described for selectively dispensing a fluid on to a substrate. The apparatus including a holder for holding a substrate, such as a non-planar substrate or circuit board. A fluid dispenser for dispensing fluid, such as an adhesive, and a positioning device for moving the fluid dispenser are also provided. The positioning device and fluid dispenser are arranged to allow fluid to be dispensed on to a substrate, held by the holder. The holder including a tilting mechanism that enables a substrate, held by the holder to be tilted about at least one axis. In use, a substrate may be tilted such that the region of the substrate onto which fluid is to be dispensed by the fluid dispenser is at least approximately horizontal thereby preventing unwanted fluid flow under gravity. | 12-30-2010 |
| 20100325863 | SURFACE SENSING DEVICE - A method for orienting a surface sensing device (SSD) uses an apparatus having a support attachable to a moveable arm of a machine, such as a coordinate measuring apparatus. The support includes a first member rotatable about a first axis of rotation and a SSD for sensing the surface of a workpiece; the SSD is releasably connectable to the first member for rotation therewith. The method includes the steps of disconnecting a SSD from a support, the SSD being connected to the support in a first orientation; rotating one of the SSD and the support relative to the other of the SSD and the support and reconnecting the SSD and the support into a second orientation. An apparatus for orienting a surface sensing device is further described. | 12-30-2010 |
| 20100292956 | Dimensional measurement probe - A probe for measuring the dimensions of objects on a coordinate positioning machine such as a machine tool has a workpiece-contacting stylus. This is suspended via a sensor mechanism, including strain gauges which provide an output when the stylus contacts a workpiece. A processor processes the strain gauge outputs to produce a trigger signal. It does so in accordance with an algorithm or equation or look-up table which ensures equal sensitivity in all possible directions of approach to the workpiece in the three dimensions X, Y, Z. | 11-18-2010 |
| 20100265973 | EXTERNAL CAVITY TUNABLE LASER WITH AN AIR GAP ETALON COMPRISING WEDGES - A tunable narrow linewidth laser is provided, wherein an adjustable etalon structure is employed to simultaneously tune the wavelength of the laser transmission and the length of the laser cavity. The etalon structure is an effective, relatively thick shear plate comprised of transparent matched wedge-shaped substrates and a pair of parallel, partially transmissive mirrors with a space therebetween. Rotation of the etalon structure relative to the laser input changes the angle of incidence to the first substrate and the etalon angle, thereby changing the wavelength of the laser light and also changing the length of the external laser cavity. Thus, reliable frequency tuning is achieved, without mode hopping. | 10-21-2010 |
| 20100245816 | Near-field Raman spectroscopy - Near-field Raman imaging is performed by holding a dielectric microsphere (e.g. of polystyrene) on or just above the surface of a sample in a Raman microscope. An illuminating laser beam is focused by the microsphere so as to produce a near-field interaction with the sample. Raman scattered light at shifted wavelengths is collected and analysed. The microsphere may be mounted on a cantilever of an atomic force microscope or other scanning probe microscope, which provides feedback to hold it in position relative to the sample surface. Alternatively, the microsphere may be held on the sample surface by an optical tweezer effect of the illuminating laser beam. | 09-30-2010 |
| 20100238977 | WIRELESS COMMUNICATIONS DEVICE AND METHOD - A wireless device is described that comprises a spread spectrum radio-frequency (RF) communications portion, such as a Bluetooth module, and an ancillary RF receiver portion. The spread spectrum RF communications portion is activated on receipt of a characteristic RF signal by the ancillary RF receiver portion. The ancillary RF receiver portion may consume substantially less power than the spread spectrum RF communications portion thereby allowing a low power standby mode to be implemented. The wireless device may be a measurement probe, such as a temperature probe, for use with machine tools and the like. An interface for transmitting the characteristic RF signal is also described. | 09-23-2010 |
| 20100223778 | METROLOGICAL SCALE AND METHOD OF MANUFACTURE - A metrological scale for scale reading apparatus is described, along with a method of manufacture of said metro-logical scale. The scale comprises a fibre reinforced substrate, such as a carbon fibre composite, and a layer of material, such as a plated or stuck on layer of metal, into or onto which scale markings are made. The method of manufacture of said metrological scale comprises the steps of: making a scale body comprising a layer of material, and a fibre reinforced composite substrate, wherein the qualities of the substrate are tailored to achieve the required coefficient of thermal expansion; and, making graduations in or on the layer of material of the scale body to form a scale. | 09-09-2010 |
| 20100217236 | NEUROLOGICAL APPARATUS - A guide element for insertion into the brain to guide implantable instruments, wherein the guide element comprises an elongate part, the elongate ‘part having a composition of at least 80% tungsten carbide. The guide element may have a coating, such as a biocompatible plastics material which is more resilient than the elongate part. | 08-26-2010 |
| 20100207617 | Magnetic encoder and reference mark applicator - A magnetic encoder scale comprises a series of periodically spaced magnetic marks. A reference mark is applied to the scale using an applicator or template, which has a feature for locating the reference mark. The applicator or template comprises one or more magnetic marks corresponding to the periodic scale marks, whereby the applicator or template automatically assumes a defined phase relationship relative to the periodic scale marks when placed on the scale. The reference mark may be attached to the scale self-adhesively. Or it may be formed by removal of material from the scale, guided by the applicator or template. Or the applicator may comprise a strong permanent magnet which applies further magnetisation to a region of the scale. | 08-19-2010 |
| 20100206068 | STORAGE APPARATUS FOR A MEASUREMENT PROBE - The invention relates to a storage apparatus for a measurement probe for use with a coordinate positioning machine. The storage apparatus has at least one receptacle for a measurement probe. At least one receptacle connector is provided for electrical connection with at least one probe connector on a measurement probe located in the receptacle. The at least one receptacle connector is configured such that it can be displaced so as to disconnect it from the probe connector of a measurement probe located in the receptacle. | 08-19-2010 |
| 20100163536 | Substrate treatment device and method and encoder scale treated by this method - The invention provides a substrate treatment method and apparatus. Embodiments show a substrate in the form of a rotary encoder ring having a pattern of marks producable by means of a laser treatment device controllable to produce the pattern in the correct manner whilst there is continuous relative displacement between the ring and the laser treatment device. | 07-01-2010 |
| 20100158322 | PHASE ANALYSIS MEASUREMENT APPARATUS AND METHOD - A non-contact method and apparatus for inspecting an object via phase analysis. A projector projects an optical pattern onto the surface of an object to be inspected. At least first and second images of the surface on which the optical pattern is projected are then obtained. The phase of the optical pattern at the surface is changed between the first and second image by moving the projector relative to the object. | 06-24-2010 |
| 20100156056 | Machine adaptation - The invention relates to the transmission of power and/or data from/to a stationary part of a machine tool | 06-24-2010 |
| 20100142798 | NON-CONTACT MEASUREMENT APPARATUS AND METHOD - A non-contact method and apparatus for inspecting an object. At least one first image of the object on which an optical pattern is projected, taken from a first perspective is obtained. At least one second image of the object on which an optical pattern is projected, taken from a second perspective that is different to the first perspective is obtained. At least one common object feature in each of the at least one first and second images is then determined on the basis of an irregularity in the optical pattern as imaged in the at least one first and second images. | 06-10-2010 |
| 20100135534 | NON-CONTACT PROBE - A non-contact measurement apparatus and method. A probe is provided for mounting on a coordinate positioning apparatus, comprising at least one imaging device for capturing an image of an object to be measured. Also provided is an image analyser configured to analyse at least one first image of an object obtained by the probe from a first perspective and at least one second image of the object obtained by the probe from a second perspective so as to identify at least one target feature on the object to be measured. The image analyser is further configured to obtain topographical data regarding a surface of the object via analysis of an image, obtained by the probe, of the object on which an optical pattern is projected. | 06-03-2010 |
| 20100135357 | TEMPERATURE SENSING APPARATUS - A temperature sensor is described that comprises a temperature sensing element, a substantially thermally insulating substrate having a first side and a second side and at least one layer of substantially thermally conductive material coated on the first side of the substrate. A first hole is provided on the second side of the substrate and the temperature sensing element is arranged to sense temperature within the first hole. A plurality of additional holes may also be provided on the second side of the substrate, these holes may be coated to aid thermal transfer. The temperature sensing element may be a thermocouple. The temperature sensor may be included in a temperature measurement probe for use in measuring the temperature of workpieces produced using a machine tool. | 06-03-2010 |
| 20100132432 | SURFACE SENSOR OFFSET - A method of operating a coordinate positioning apparatus having a surface sensor that is rotatable about at least a first axis. The method comprises obtaining a first measurement with the surface sensor at a first angular orientation and obtaining a at least a second measurement with the surface sensor at a second angular orientation. The first and second angular orientations are different to each other such that any offset of the surface sensor from an expected position will have at least a partially opposing affect on the first and second measurements. The method then compensates and/or establishes for the offset using the first and second measurements. | 06-03-2010 |
| 20100132207 | ANALOGUE PROBE AND METHOD OF OPERATION - An analogue probe for use with a coordinate positioning machine. The analogue probe comprises a temperature actuator which can be modulated so as maintain the temperature of at least a part of the analogue probe at a substantially constant predetermined temperature. | 06-03-2010 |
| 20100122920 | Storage Apparatus - The invention relates to a storage apparatus for a measurement probe for use with a coordinate positioning machine. The storage apparatus comprises: a storage unit having at least one receptacle for a measurement probe; and at least one temperature source for controlling the temperature of a measurement probe located in the at least one receptacle. | 05-20-2010 |
| 20100119104 | APPARATUS AND METHOD FOR SURFACE MEASUREMENT - A method of determining the dimensions and location of a surface feature, for example a valve seat. The surface of the feature is measured, for example using a spiral scan path with a tactile probe and the multiple data points acquired from the scan are used to create a digitized image. The digitized image is fitted to a nominal image (e.g. CAD data) of the surface feature. The deviation of the digitized image from the nominal image is used to determine at least one of the dimensions, location and form deviation of the surface feature. | 05-13-2010 |
| 20100118913 | METHOD AND APPARATUS FOR RAPID TEMPERATURE MEASUREMENT - A method of using a temperature sensor to determine the temperature of an object is described. The method comprises bringing the temperature sensor into thermal contact with the object to be measured. The temperature sensor is then used to acquire a plurality of temperature readings, the plurality of temperature readings being acquired prior to the temperature sensor reaching thermal equilibrium with the object. At least some of the plurality of temperature readings are then used to determine a pseudo-stable temperature at which the rate of change of temperature readings with time is less than a predetermined rate. The actual temperature of the object may then be predicted from the pseudo-stable temperature. | 05-13-2010 |
| 20100101104 | APPARATUS AND METHOD FOR CALIBRATING A SCANNING HEAD - A method of calibrating a measurement scale in a motorised scanning head using a reference artefact is described. The method comprises the step of rotating a surface sensing device, such as a scanning probe, mounted on the scanning head about at least one axis of the scanning head to move the surface sensing device into a plurality of different angular orientations relative to the reference artefact. A step is then performed of measuring, with the surface sensing device, at least one property of the reference artefact at each of the different angular orientations. An error map or function is then created for at least one measurement scale of the scanning head using the properties of the reference artefact measured and optionally known or calibrated properties of that reference artefact. The method may comprise use of co-ordinate positioning apparatus, such as a co-ordinate measuring machine, to move the scanning head. The reference artefact may comprise a single feature or an array of features. | 04-29-2010 |
| 20100097603 | SPECTROSCOPIC APPARATUS AND METHODS | 04-22-2010 |
| 20100073672 | SAMPLE POSITIONING STAGE AND METHOD OF OPERATION - A sample positioning stage for positioning a sample to be inspected relative to an optical inspection device. The stage includes a first generally planar body on which a sample to be inspected can be carried and a second body directly coupled to the first body via bearings extending between them which constrain movement of the first body relative to the second body to a first plane that is substantially parallel to the plane of the first body. There is also provided a drive system being selectively operable in a first mode and a second mode. | 03-25-2010 |
| 20100072456 | OPTO-ELECTRONIC READ HEAD - A read head for a scale reading apparatus, the head including a light source and an array of photodetector elements, wherein said light source and array of photodetector elements are fabricated in a lattice matched semiconductor compound. | 03-25-2010 |
| 20100058602 | Coordinate positioning machine - A coordinate positioning apparatus has a base a structure and six struts joining the base and the structure. A working volume is defined by the base, structure and six struts. A support member extends from the supported structure. At least one access region is provided into the working volume, the access area being formed between two adjacent struts, the area of the access region being greater than the area between another set of adjacent struts. Access to the working volume is thereby improved. | 03-11-2010 |
| 20100053615 | ROTATION DETECTION KIT - A rotation detection kit, comprising: a beam source; a receiver comprising at least one beam intensity sensor; a polariser device for location in the path of a beam emitted from the beam source and received by the beam sensor; and a modulator. The modulator is configured to modulate at least one of i) the beam source and ii) a beam emitted by the beam source to create a discretely varying polarisation orientation thereby defining first and at least second temporally spaced beam portions. The temporally spaced beam portions are incident on the polariser device and the beam sensor and have substantially identical profiles and at least an initial common propagation axis toward the polariser device. | 03-04-2010 |
| 20100051783 | TOOL SETTING OR ANALYSIS DEVICE - A tool setting or tool analysis device for a machine tool comprises a light source for producing a light beam. A light receiver receives the light beam and produces a signal indicative of the amount of light received. This is analyzed by a main analysis circuit to generate a trigger signal to a machine controller when the beam is at least partially occluded. To provide fail-safe operation should the main circuit not recognize the tool, a back-up trigger signal is produced after a delay by a delay circuit. In one preferred form, the back-up trigger signal may oscillate, providing repeated edges which can ensure fail-safe operation even if the machine controller suffers from a blind window and therefore misses the initial trigger signal. | 03-04-2010 |
| 20100050837 | METHOD FOR MEASURING A WORKPIECE USING A MACHINE TOOL - A method is described for measuring a workpiece on a machine tool using an analogue probe having a deflectable stylus. The method comprises the step of taking a workpiece having a nominal surface profile, the workpiece being located within the working area of the machine tool. The machine tool is used to move the analogue probe along a predetermined (known) measurement path relative to the workpiece whilst deflection of the stylus is measured. The analogue probe is moved relative to the workpiece at a speed greater than five millimeters per second and the predetermined measurement path is selected to provide intermittent contact between the stylus and the workpiece. | 03-04-2010 |
| 20100042070 | NEUROLOGICAL APPARATUS COMPRISING A PERCUTANEOUS ACCESS DEVICE - Apparatus for delivering therapeutic agents to the central nervous system of a subject is described. The apparatus comprises at least one intracranial catheter and a percutaneous access device. The percutaneous access device comprises a body having at least one extracorporeal surface and at least one subcutaneous surface, the body defining at least one port for connection to an implanted intracranial catheter. The port is accessible from the extracorporeal surface of the device, but is provided with a seal such as a rubber bung between the lumen of the port and the extracorporeal surface. The percutaneous access device may have more than two ports and/or a flange. A method of implanting the percutaneous access device is also described. | 02-18-2010 |
| 20100027031 | OBJECT DETECTOR APPARATUS AND METHOD - An object detector apparatus. The object detector apparatus comprises a receiver which is configured to receive a signal from an object having a repetitive motion, in which the signal repeats at a frequency that is dependent on the frequency of the repetitive motion of the object. The object detector apparatus further comprises an analyser which is configured to sample a signal received by the receiver according to a first set of sampling parameters into a first sampled data set, and to produce an output based on a comparison of the first sampled data set with at least one previously sampled data set. The analyser is also operable to sample a signal received by the receiver using a second set of sampling parameters which differs to the first set of sampling parameters into a second sampled data set, and to produce an output based on a comparison of the second sampled data set with at least one previously sampled data set. | 02-04-2010 |
| 20100027003 | Spectroscopic analysis methods - A spectroscopic analysis method in which spectral data of mixtures obtained from a plurality of points on a sample surface are resolved into component spectra and concentrations. A new alternating least squares multivariate curve resolution technique is presented which iteratively resolves the components. The technique starts from an initial estimate that the spectral values of a first component of the sample are all equal (an ‘empty model’), and resolves that component. Then successive further components are iteratively resolved, from initial ‘empty model’ estimates of those components and from previously resolved spectra. In the common case where the main component is present in nearly pure form in the data set, this empty modelling technique results in more accurate resolution of the components. This is due to the ability of the technique to resolve the pure spectra of minor components without modelling concentrations of the main component into them. | 02-04-2010 |
| 20100018069 | CALIBRATION METHOD AND APPARATUS - A method is described for calibrating apparatus comprising a measurement probe ( | 01-28-2010 |
| 20100011600 | Apparatus and Method of Measuring Workpieces - A method and apparatus for measuring a surface using a surface sensing device mounted on a scanning head on a member of a coordinate positioning apparatus. The coordinate positioning apparatus may be operated to produce relative movement between the scanning head and the surface profile and the scanning head includes a drive for producing rotational movement of the surface sensing probe about one or more axis. The coordinate positioning apparatus is driven to provide relative movement between the member and the surface profile in a circular path and the probe head is driven to move the surface sensing device about said one or more axes, such that the surface sensing device maintains a nominally constant lead angle. The motion of the coordinate positioning apparatus and probe head is synchronous. | 01-21-2010 |
| 20100008713 | Pivot Joint Assembly - A pivot joint assembly is described that includes a multi-axis revolute joint portion and a ball joint portion. The multi-axis revolute joint portion provides rotational movement about two or more revolute axes that substantially intersecting at an intersection point. The ball joint portion comprising a ball located in the vicinity of said intersection point. The pivot joint assembly allows separate coupling of load members and metrology members to one or more platforms. A hexapod co-ordinate measuring machine including such pivot joint assemblies is also described. | 01-14-2010 |
| 20100005852 | Method of error compensation in a coordinate measuring machine - A method of calibrating an articulating probe head comprising the steps of measuring an artefact of known dimensions with the workpiece sensing probe mounted on the articulating probe head, in which the articulating probe head is unlocked. An error functional map is generated corresponding to the difference between the measured and known dimensions of the artefact. Subsequent workpieces are measured with the articulating probe head unlocked and the corresponding correction applied. The true dimensions of the artefact may be determined by measuring it with a probe mounted on an articulating probe head in which the axes of the articulating probe head are locked. A mechanical lock is provided to lock the axes of the articulating probe head. | 01-14-2010 |
| 20090320553 | Surface Measurement Probe - Apparatus and method of determining drift for a surface measurement probe. The surface measurement probe has a housing, a surface contacting stylus, a vibration generator which causes vibration of the stylus, a sensing device for determining a parameter related to change in vibration of the stylus, and a comparator for determining the relationship of the parameter with a threshold. Readings of the parameter are taken when the stylus is not in contact with a surface and average over a time t, which is significantly larger than the transition time when touching a surface. The average of the readings of the parameter is compared to a reference parameter. The comparison is used to determine whether there has been significant drift of the parameters. Thus drift due to temperature change is corrected. | 12-31-2009 |
| 20090310215 | SAMPLE POSITIONING APPARATUS - A sample positioning stage for positioning a sample to be inspected relative to an optical inspection device, including a first generally planar body on which a sample can be carried and a second body directly coupled to the first body via at least one rigid bearing and at least one resiliently compliant bearing provided between the first and second bodies. The first and second bodies are preloaded against each other in a dimension substantially parallel to the plane of the first generally planar body via the bearings. The stage also includes a motorized drive system operable to drive the first and second bodies relative to each other in the first plane toward a demanded relative position received from a position input device, and a position sensing device on at least one of the first and second bodies, for providing a measure of the relative position of the first and second bodies. | 12-17-2009 |
| 20090310132 | Spectroscopic apparatus and methods - In a Raman spectroscopy apparatus, exciting light is focussed on a sample ( | 12-17-2009 |
| 20090310131 | Spectroscopy system - A Raman spectroscopy system has a filter arrangement comprising two filters ( | 12-17-2009 |
| 20090307916 | Method for scanning the surface of a workpiece - A method for measuring a surface profile using a surface sensing device mounted on an articulating probe head in which the probe head is moved along a nominal path relative to the surface profile, an at least approximation of the surface normal of the surface profile, the surface profile is sensed with the surface sensing device and the distance or force of the surface sensing device relative to the surface profile substantially in the direction of the surface normal. The surface normal may be determined by approximating at least one section to a curved profile which can be mathematically parameterised. | 12-17-2009 |
| 20090307915 | Differential Calibration - A method of calibrating a measurement probe ( | 12-17-2009 |
| 20090304314 | Gas Bearing Fabrication Method - A method of fabricating a bearing surface ( | 12-10-2009 |
| 20090297257 | Pivot Joint - A pivot joint has a first member having a ball located at one end, a fixed member having one or more bearing surface, which locates on the ball of the first member and a second member having one or more bearing surface located at one end which locates onto the ball of the first member. The first and second members are rotatable about the centre of the ball. This type of pivot joint is suitable for use in a machine such as a Stewart platform. | 12-03-2009 |
| 20090279100 | SCALE AND READHEAD - An optical element has a member having features which interact with incident light to produce two or more resultant beams. The configuration of the optical element is such that light which interacts with said features when passing through the member from a first side to produce two or more resultant beams does not interact with said features when returned to another side of the member and/or vice versa. The optical element may be used in a readhead of a scale and readhead apparatus. | 11-12-2009 |
| 20090269128 | Pivot joint - A pivot joint has a first structure comprising a ball mounted in a receptacle, wherein the location of the ball is held with respect to the receptacle, and a second structure mounted on and movable with respect to the ball, wherein the second structure has at least one bearing surface which defines its position with respect to the ball. The ball may be held in location by contact with the receptacle at least two positions. At least one of the positions of contact may be adjustable. | 10-29-2009 |
| 20090260243 | Metrology Apparatus - Position measurement apparatus, such as hexapod co-ordinate measuring machine, is described that comprises a thrust frame and a metrology frame. The thrust frame comprises a load carrying base connected to a moveable platform by a plurality of powered extendable legs. The metrology frame comprising a metrology base attached to the load carrying base by a base attachment mechanism such as kinematic mounts. The base attachment mechanism is arranged to prevent any distortions of the load carrying base being transmitted to the metrology base. | 10-22-2009 |
| 20090257067 | Dynamic Air Turbulence Compensation for Laser Measurement Apparatus - Measurement apparatus comprising a laser measuring system an acoustic system is described. The apparatus provides a feedback control signal that can be used in the feedback control system of an associated machine. To allow real time, dynamic, operation the laser measurements are compensated using a compensation value derived from a plurality of laser measurements and at least one acoustic time of flight value. | 10-15-2009 |
| 20090255230 | GAS TURBINE - A gas turbine having air cooling is provided with an effective measure for cleaning cooling air which is used in the turbine, which measure is particularly efficient. In order to allow comparatively pure, that is to say particle-free, compressed cooling air to flow into the cooling-channel system of the turbine, it is proposed that a protective element is provided for particle separation in a manner which is adjacent radially further to the outside to the removal opening, which protective element impedes particles which floating the compressor final air from flowing into the removal opening. As a result the clogging of cooling—air holes in impact-cooled turbine components which are loaded by hot gas can be avoided. | 10-15-2009 |
| 20090255139 | SURFACE SENSING DEVICE - An apparatus for measuring a surface of a workpiece is described. The apparatus comprises a support, attachable to the moveable arm of a machine, such as a coordinate positioning machine, and rotatable about first and second axes of rotation, the axes driven by first and second motors respectively. The apparatus additionally comprises a surface sensing device for sensing the surface of a workpiece, rotatable about a third axis of rotation. This third axis of rotation is alignable with the first axis of rotation, and when aligned, rotation of the support relative to the surface sensing device is actuatable by the first motor. A method for using an apparatus for measuring a surface of a workpiece is also described. | 10-15-2009 |
| 20090248345 | Probe Calibration - A method of calibrating a probe is disclosed said probe being mounted on a machine and having a stylus with a workpiece contacting tip, comprising calculating calibration information for the probe for a first orientation of the probe, and rotating the calibration information by an angle to obtain a probe calibration information for when the probe is oriented by that angle with respect to the first orientation. Also disclosed is a method of calibrating a probe during a measurement process. The calibration information may include a vector which relates probe head axes to machine axes; a calibration matrix; datum data; an inertial matrix. The stylus tip may be datumed at the orientation of the probe or inferred from datum information obtained at different orientations. The rotation step may be carried out by a software/computer program which may be stored on a controller for the machine. | 10-01-2009 |
| 20090235547 | Method for Measuring an Object - A ‘go, no-go’ method is described for determining whether the dimensions of an object, such as a workpiece, conform to tolerance. The method uses a measurement probe, such as a touch trigger, analogue, or non-contact probe, mounted on a measuring apparatus such as a coordinate measuring machine, machine tool, or a lathe. The method comprises the step of driving the measurement probe around a path relative to the object, said path being based on a tolerance of the object. The path relative to the object may include at least a first path based on the maximum tolerance of the object and a second path based on the minimum tolerance of the object. The method additionally comprises the steps of monitoring any probe measurement data acquired by the measurement probe as the probe is driven around the path, and indicating if the dimensions of the object do not conform to tolerance only if there is a change in state of the probe measurement data that is acquired as the measurement probe is driven around the path. | 09-24-2009 |
| 20090198218 | NEUROSURGICAL INSTRUMENTS - A catheter assembly for insertion into the brain. The assembly comprises a first length of tubing made of a first material. A second material surrounds the first length of tubing, the second material being more flexible than the first material and having a hardness of less than 50 Rockwell E. The second material provides damping to the first length of tubing. | 08-06-2009 |
| 20090194664 | Extendable Leg Assembly for Position Measurement Apparatus - An extendable leg assembly for a measuring machine, such as a co-ordinate measuring machine, is described. The extendable leg assembly has a first end and a second end and comprises metrology apparatus for measuring the separation between the first end and the second end. The metrology apparatus comprises one or more elongate metrology members having a low coefficient of thermal expansion. The extendable leg assembly may be attached to one or more platforms by a pivot joint. | 08-06-2009 |
| 20090183610 | Method of Machine Tool Calibration - Methods are described for calibrating a turning machine having a first rotatable portion or chuck for holding a workpiece. The first rotatable portion has a first feature associated therewith. The method comprises the steps of using a measurement probe to determine the position of the first feature, rotating the first rotatable portion through an angle, and using said measurement probe to determine the new position of the first feature. The extension of the technique to swivel head mill-turn machines is also described. | 07-23-2009 |
| 20090165318 | Contact Sensing Probe - Contact sensing probe apparatus includes a workpiece contacting stylus, a transducer mechanically coupled to the stylus and an oscillator for supplying an alternating current to the transducer to induce vibration of the stylus. A contact sensor is also provided for monitoring the phase difference between the voltage supplied to the transducer and the current flow to the transducer. The oscillator is arranged to supply the transducer with an alternating current of a first frequency during contact sensing. This first frequency is selected to induce mechanical resonance but to be away from the maximum of the mechanical resonance peak. The probe may be used with co-ordinate positioning machines, such as portable articulated measuring arms, co-ordinate measuring machines (CMM) and the like. | 07-02-2009 |
| 20090140873 | Machine tool probe - A probe has internal circuitry capable of operating in a plurality of different modes, for example a variety of filter modes and turn off modes. A switch on the probe sends an input to a controller which is arranged to set the mode in response to operation of the switch. The switch may be a push button which is operated externally of the probe by means of an actuator in the form of a plunger. The probe has a workpiece-contacting stylus mounted on a seat from which it is deflectable. The stylus and the seat may comprise the switch. An indicator, e.g., an LED, indicates the mode in response to an output from the controller. The controller outputs a plurality of indications of different modes in a sequence and a mode is selected by operating the switch once the desired mode is indicated. | 06-04-2009 |
| 20090130987 | Probe signalling - A measurement probe | 05-21-2009 |
| 20090127131 | Scale Making Method - Apparatus and method for making a metrological scale by electrochemical machining of a scale substrate using a tool having at least one feature. The method has the steps of passing an electrolyte solution between the tool and the scale substrate and forming an electrical connection between the scale substrate and the tool. Electrochemical dissolution of the scale substrate occurs adjacent to the feature of the tool to produce at least one scale marking. This is suitable for making linear, rotary and two dimensional scales. | 05-21-2009 |
| 20090112357 | Machine tool method - Apparatus and method for fitting a workpiece to geometric design data of a workpiece. Nominal data points are selected from the geometric design data. Command codes are created to generate measured data points. The measurement data points have associated nominal measurement points which are used to fit the workpiece to the geometric design data. The apparatus and method may also be used to determine whether a workpiece is within tolerance and for process control. | 04-30-2009 |
| 20090100693 | Contact Sensing Probe - A contact sensing probe having a stylus which is vibrated longitudinally by a piezoelectric transducer. Contact with a workpiece is detected from damping of the vibration. The stylus is mounted to a probe body via parallel diaphragm springs. These cooperate with a counter mass to form a mechanical low pass filter, which isolates the stylus vibrations from influences caused by the mounting or handling of the probe body. | 04-23-2009 |
| 20090099803 | Method Of Determining Measurement Probe Orientation - A dimensional measurement probe ( | 04-16-2009 |
| 20090095892 | Encoder Error Determination - A rideheight sensing device is described for providing a measure of the separation between the readhead portion and the scale of an encoder. The rideheight sensing device comprises a rideheight sensor that is located at, or is attachable to, the readhead portion of an encoder. The temporary, or permanent, attachment of such a device to the readhead portion of an encoder is also described. In a preferred embodiment, a rotary encoder is described and the rideheight sensing device is used to measure the eccentricity thereof. | 04-16-2009 |
| 20090080990 | Power and/or Signal Paths for a Machine Tool Accessory - A tool shank ( | 03-26-2009 |
| 20090072130 | Rotary Encoder Apparatus and Method - Rotary encoder apparatus is described that comprises an encoder scale or ring and an encoder scale reader. The encoder scale includes an incremental scale and one or more reference marks. The encoder scale reader comprises at least a first readhead and a second readhead that each produce a reference mark signal when passed over a reference mark of the encoder scale. The apparatus also comprises a reference position setter for determining, as the encoder scale reader is rotated relative to the encoder scale, at least one angularly repeatable reference position of the encoder scale relative to the encoder scale reader using a first reference mark signal produced by the first readhead and second reference mark signal subsequently produced by the second readhead. | 03-19-2009 |
| 20090070585 | Measurement probe systems for co-ordinate positioning apparatus - A measurement probe, such as a touch trigger measurement probe, is described that comprises a measurement portion for measuring an object and a data transfer portion for receiving data from and/or transmitting data to an associated unit. The measurement device also comprises an authentication module for verifying the authenticity of the associated unit. The authentication module may include a processor for running a one-way hash algorithm. Authenticity may be established using a challenge and response authentication process. | 03-12-2009 |
| 20090064524 | Scale and Readhead System - A method of calibrating a scale measurement apparatus. A scale has scale markings arranged to form an incremental pattern and at least one scale mark. A readhead has an incremental detector means which produces an output signal and a scale mark detector means for producing a signal having a zero crossing. The readhead is moved relative to the scale. The output from the incremental detector is used to determine a predetermined phase in the output signal and the value of the signal from the scale mark detector corresponding to the predetermined phase in the output signal from the incremental detector on either side of the zero crossing is determined. These values are used to define the width of the scale mark pulse. | 03-12-2009 |
| 20090055118 | Method of path planning - A method for planning the trajectory of an apparatus, such as an articulating probe head, mounted on a coordinate positioning apparatus, such as a CMM. It is determined whether for a given trajectory, the angular velocity or acceleration of the apparatus about a rotational axis of the apparatus will exceed a predetermined threshold. If so, parameters are adjusted so that the angular velocity or acceleration do not exceed the threshold. | 02-26-2009 |
| 20090051933 | Tool Detection - An object detection apparatus and a method for calibrating an object detection apparatus. The apparatus comprises a housing provided with a light source and a light detector. The light source directs a beam of light towards the light detector. The housing has a base which is provided with a datum surface. The light beam has a defined distance and angle from the datum base. The method for calibrating an object detection apparatus involves setting threshold levels for light intensity received at the light detector. The apparatus has two modes of operation. The invention also includes an adapter for an object detection apparatus which detects the presence of an object by obstructing a light path. | 02-26-2009 |
| 20090049704 | Signal transmission apparatus for a measurement probe - A measurement probe ( | 02-26-2009 |
| 20090048508 | Rf coil assembly for use in magnetic resonance imaging - An RF coil assembly for use with magnetic resonance imaging (MRI) apparatus is described. The RF coil assembly comprises one or more coil elements capable of receiving electromagnetic radiation and is capable of being directly attached to a stereotactic base ring. The RF coil assembly may comprise a localiser box having fiducial markers. A corresponding attachment apparatus is also described for optimising the attachment position of a stereotactic base ring to a subject's head. The attachment apparatus comprises one or more fixing elements that allow the attachment apparatus to be releasably attached to a stereotactic base ring. In one embodiment, the internal dimensions of the attachment apparatus are selected to be substantially the same as the internal dimensions of an RF coil assembly. Corresponding methods are also described. | 02-19-2009 |
| 20090040534 | Surface sensing device with optical sensor - A surface sensing device for use in position determining apparatus has an elongate stylus ( | 02-12-2009 |
| 20090034677 | Deactivatable measurement apparatus - Measurement apparatus is described that comprises a measurement portion for acquiring object measurements and an output portion (for outputting measurement data relating to the acquired object measurements. A deactivation portion is provided for inhibiting normal operation of the measurement apparatus such that output of the measurement data is prevented. The deactivation portion, in use, reads apparatus usage information from an apparatus usage module and inhibits normal operation of the measurement apparatus if said apparatus usage information fails to meet one or more predetermined criteria. The apparatus usage module may be provided as an integral part of the measurement apparatus or as a separate activation button. The measurement apparatus may comprise a measurement probe such as a touch trigger measurement probe. | 02-05-2009 |
| 20090032506 | Method of Scale Manufacture - The present invention relates to an apparatus for the manufacture of a metrological scale comprises a scale substrate ( | 02-05-2009 |
| 20090030648 | Apparatus and Method of Measuring Workpieces - A method and apparatus for measuring a surface using a surface sensing device mounted on a scanning head on a member of a coordinate positioning apparatus. The coordinate positioning apparatus may be operated to produce relative movement between the scanning head and the surface profile and the scanning head includes a drive for producing rotational movement of the surface sensing probe about one or more axis. A desired measurement profile on the surface which the surface sensing device will track and the desired motion of the orientation of the surface sensing device as the surface' sensing device follows the measurement profile are defined. This data is used to derive the required path of the relative motion between the member of the coordinate positioning apparatus and the surface, such that the surface sensing device prescribes a trajectory along the measurement profile. | 01-29-2009 |
| 20090030373 | Method and Apparatus for Fluid Delivery - Fluid delivery apparatus is described for the delivery of fluids to regions of the body, especially for delivery to regions of the brain. The apparatus includes a first length of implantable tubing having a first end and a first fluid connector portion attached to the first end of the first length of implantable tubing. The first fluid connector portion is releaseably connectable to a complementary second fluid connector portion. An implantable housing is also provided for enclosing and protecting the first fluid connector portion. The implantable housing is openable to provide access to the first fluid connector portion. For example, the housing may have a hinged lid or cover portion. A corresponding method is also described. | 01-29-2009 |
| 20090028286 | Measurement apparatus and a method of using measurement apparatus - A method of measurement using a measurement probe system includes the steps of (i) providing a measurement probe system having a measurement probe to a user, the measurement probe system being suitable for use with co-ordinate positioning apparatus and (ii) monitoring usage of the measurement probe system. | 01-29-2009 |
| 20090026184 | Method and Apparatus for Scale Manufacture Without Substantial Removal of Material - A method of making metrological scale for scale reading apparatus includes directing a laser beam onto a scale substrate ( | 01-29-2009 |
| 20090025463 | Method for Scanning the Surface of a Workpiece - A measurement system has a surface sensing device mounted on an articulating probe head, which in turn is mounted on a coordinate positioning apparatus. The surface sensing device is moved relative to a surface by driving at least one of the coordinate positioning apparatus and probe head in at least one axis to scan the surface. The surface sensing device measures its distance from the surface and the probe head is driven to rotate the surface sensing device about at least one axis in order to control the relative position of the surface sensing device from the surface to within a predetermined range in real time. | 01-29-2009 |
| 20090025244 | Articulating Probe Head Apparatus and Method - Apparatus for a co-ordinate positioning machine is described that comprises an articulating probe head for supporting a measurement probe. The articulating probe head comprises at least one electric motor. Heating means are provided for generating heat in the articulating probe head. The heating means may be the motors or discrete heating elements. Temperature sensing means, such as one or more temperature sensors, is also provided for determining the temperature at the articulating probe head. The apparatus allows the temperature of the articulating probe head to be controlled. | 01-29-2009 |
| 20090025243 | Modular Measurement probe - A measurement probe, such as a touch trigger probe, is described that comprises a stylus module attachable to a base module. The stylus module comprising a housing and a stylus holder moveably attached to the housing. The base module comprises a measurement portion for generating measurement data indicative of movement of the stylus holder relative to the housing. The stylus module has an inbuilt failure mode and thereby a substantially predetermined operational lifetime. In one embodiment, the inbuilt failure mode is provided by integrating a battery into the stylus module. Providing a mechanical failure mode in which a component of the stylus module catastrophically fails after a certain amount of usage is also described. | 01-29-2009 |
