Patent application number | Description | Published |
20110040514 | METHOD FOR CALIBRATING A COORDINATE MEASURING MACHINE - A reference measurement object having known properties is used for the purpose of calibrating a coordinate measuring machine. A plurality of reference measured values are picked up on the reference measurement object. Calibration data are determined using the reference measured values and using the known properties of the reference measurement object. The calibration data comprises a first number of polynomial coefficients that are selected to correct nonlinear measuring errors using at least one polynomial transformation. The first number of polynomial coefficients is reduced in an iterative method to a lesser second number, with a plurality of pairs of polynomial coefficients being formed and with a polynomial coefficient of a pair being eliminated in each case when a statistical dependence between the polynomial coefficients of the pair is greater than a defined threshold value. | 02-17-2011 |
20110146092 | FEELER PIN AND FEELER HEAD FOR A COORDINATE MEASURING MACHINE - The present invention relates to a feeler pin for a coordinate measuring machine. The feeler pin comprises a shaft having a first end and a second end, a fastening sleeve for fastening the feeler pin in a feeler pin holder, and an identification device for identifying the feeler pin. A feeler object is provided at the first end of the shaft, wherein the identification device can be read out via a first contact and a second contact. Further, it is provided that the second end of the shaft and the fastening sleeve are connected by a plastic section, wherein the first contact is provided by the fastening sleeve, and the second contact is provided by a rotationally symmetrical contact device which is electrically insulated from the fastening sleeve by the plastic section. Further, the present invention relates to a feeler head for holding the at least one feeler pin. | 06-23-2011 |
20120246953 | COORDINATE MEASURING DEVICE HAVING POSITIONAL CHANGE SENSORS - The present invention relates to a coordinate measuring machine having a sensor for measuring an object, and having a housing structure for holding and positioning the sensor, wherein a position change sensor is provided in order to detect a change in position of the sensor and of the housing structure. Further, the invention relates to a method for collision detection of a coordinate measuring machine. Last, the invention relates to a method for correcting data of a sensor, measuring in a contactless fashion, in particular an optical sensor, of a coordinate measuring machine. The method according to the second and the third aspects can be executed on a coordinate measuring machine according to the first aspect. | 10-04-2012 |
20130127450 | METHOD AND DEVICE FOR DETECTING THE COUPLING OF PARTS TO A MACHINE - A coupled state versus a decoupled state of a part relative to a machine, in particular of a coordinate measuring device or a machine tool, is determined. The part to be coupled can be moved toward a contact region of the machine in an axial direction in order to establish the coupled state, and can be moved away from the contact region in the axial direction in order to establish the decoupled state. A magnetoresistive sensor is used to generate a sensor signal that depends on an axial position of the part and a further sensor signal that depends on a rotational position of the part relative to the machine. The sensor signals are evaluated and the result is used to determine whether the part is coupled to the contact region of the machine and/or whether the part is decoupled from the contact region. | 05-23-2013 |
20130147467 | SENSOR ASSEMBLY AND METHOD FOR DETERMINING A SPATIAL POSITION OF A FIRST PART RELATIVE TO A SECOND PART - A sensor assembly for determining a spatial position of a first part relative to a second part has at least one magnet disposed on the first part. The magnet generates a magnetic field that extends to the second part. The sensor assembly further has a pair of magnetic field sensors arranged at a spatial distance from each other on the second part. The magnet is positioned in an interval defined by the spatial distance between the magnetic field sensors. The magnetic field sensors each produce an output signal depending on the magnetic field. The output signals of the two magnetic field sensors are combined to form a common sensor signal related to the spatial position of the first part relative to the second part. The output signals of the two magnetic field sensors essentially represent a direction of the magnetic field at the location of the respective magnetic field sensors. | 06-13-2013 |
20140041242 | APPARATUS WITH INTERNAL OPTICAL REFERENCE - An apparatus for inspecting a measurement object, comprising a workpiece support for supporting the measurement object and a measuring head carrying an optical sensor. The measuring head and the workpiece support are movable relative to one another. The optical sensor has an objective and a camera designed to capture an image of the measurement object. The objective has a light entrance opening and a light exit opening, and comprises a multitude of lens-element groups arranged in the objective between the light entrance opening and the light exit opening one behind another along a longitudinal axis of the objective. Furthermore, the apparatus has a reflection element and a calibration arrangement. The reflection element can selectively be introduced into a beam path running from the measurement object through the objective to the camera. The calibration arrangement is coupled into the beam path to the camera by means of the reflection element. | 02-13-2014 |
20140043464 | COORDINATE MEASURING MACHINE FOR DETERMINING SPATIAL COORDINATES ON A MEASUREMENT OBJECT - A coordinate measuring machine has a workpiece support for holding a measurement object, and a measuring head displaceable relative to the workpiece support. An evaluation and control unit determines geometric properties on the measurement object depending on the position of the measuring head relative to the workpiece support and on sensor data from an optical sensor carried on the measuring head. The optical sensor includes a camera and a lens assembly having a lens body, which forms a light-entry opening and a light-exit opening with an interface for connecting the camera. The lens assembly comprises a number of lens elements arranged in the lens body. A separate cover glass is arranged in the region of the light-entry opening, and sits in front of the lens elements as a first transparent component. Preferably, the lens elements are corrected depending on optical characteristics of the cover glass. | 02-13-2014 |
20140043468 | COORDINATE MEASURING MACHINE WITH WHITE LIGHT SENSOR - A coordinate measuring machine for measuring a measurement object, comprising a workpiece support for supporting the measurement object and a measuring head carrying an optical sensor. The measuring head and the workpiece support are movable relative to one another. The optical sensor has an objective and a camera for capturing an image of the measurement object. The objective has a light entrance opening and a light exit opening, and comprises a multitude of lens-element groups arranged in the objective between the light entrance opening and the light exit opening one behind another along a longitudinal axis of the objective. A clearance is provided in the objective between the first and second lens-element groups. The coordinate measuring machine furthermore has a white light sensor and a partly reflective coupling element that is selectively moveable into the clearance for coupling the white light sensor into the objective. | 02-13-2014 |
20140043469 | CHROMATIC SENSOR AND METHOD - An apparatus for inspecting a measurement object, comprising a workpiece support for supporting the measurement object, and a measuring head carrying an optical sensor. The measuring head and the workpiece support are movable relative to one another. The optical sensor has an objective and a camera for capturing an image of the measurement object along an imaging beam path. The objective has a light entrance opening and a light exit opening, a diaphragm and a multitude of lens-element groups arranged in the objective between the light entrance opening and the light exit opening along a longitudinal axis of the objective. At least two lens-element groups are displaceable parallel to the longitudinal axis. The apparatus also has an illumination device for illuminating the measurement object along an illumination beam path, and a chromatic assembly that can selectively be introduced into the illumination beam path and/or the imaging beam path. | 02-13-2014 |
20140043470 | COORDINATE MEASURING MACHINE AND METHOD FOR DETERMINING SPATIAL COORDINATES ON A MEASUREMENT OBJECT - A coordinate measuring machine has a workpiece support for holding a measurement object and a measuring head which can be displaced relative to the workpiece support. The measuring head carries an optical sensor. An evaluation and control unit is configured to determine spatial coordinates on the measurement object depending on a position of the measuring head relative to the workpiece support and depending on sensor data from the optical sensor. The optical sensor includes a lens assembly and a camera. The lens assembly comprises at least four separate lens-element groups. Three of these separate lens-element groups can be displaced along the optical axis of the lens assembly. A first lens-element group is arranged fixed in the region of the light-entry opening of the lens assembly. The coordinate measuring machine with the above-described lens assembly allows individual variation of magnification, focusing and resolution. | 02-13-2014 |
20140043474 | MEASURING DEVICE FOR MEASURING A MEASUREMENT OBJECT AND RELATED METHOD - A measuring device and corresponding method for measuring a measurement object, comprising an illumination device for illuminating the measurement object with an illumination pattern, a pattern generation device with at least one pattern generating element for bringing about a positionally variant intensity distribution of the illumination pattern, and an optical sensor arrangement for detecting the illumination pattern reflected and/or scattered by the measurement object. The measuring device has an optics which is telecentric at least on the measurement object side and is arranged in a beam path from the illumination device to the measurement object. The optical sensor arrangement detects the illumination pattern through at least one part of the telecentric optics. The pattern generating device is designed in such a way that the illumination pattern has a positionally and/or spectrally variant vertex focal length distribution on the measurement object side. | 02-13-2014 |
20140043602 | APPARATUS AND METHOD FOR INSPECTING AN OBJECT - An apparatus and method for optically inspecting an object, comprising an object carrier for carrying the object, a pattern generating unit for illuminating the object with a measurement pattern, an image capture unit for capturing a number of images of the object, imaging optics for influencing a light beam path between the object and the image capture unit, and a data processing unit for determining at least one property of the object on the basis of the captured images. The apparatus can be set to at least a first operating distance and a second operating distance, and furthermore has a diffusing unit, which can be changed between an active state, in which the diffusing unit influences the light beam path in front of the pattern generating unit and an inactive state, in which the diffusing unit does not influence the light beam path in front of the pattern generating unit. | 02-13-2014 |
20140043610 | APPARATUS FOR INSPECTING A MEASUREMENT OBJECT WITH TRIANGULATION SENSOR - An apparatus for inspecting a measurement object, comprising a workpiece support for receiving the measurement object and a measuring head carrying an optical sensor. The measuring head and workpiece support are movable relative to one another. The optical sensor has an objective and a camera for capturing an image of the measurement object. The objective has a light entrance opening and a light exit opening, a diaphragm, and a multitude of lens-element groups arranged in the objective between the light entrance opening and the light exit opening one behind another along a longitudinal axis of the objective. At least two lens-element groups are displaceable parallel to the longitudinal axis. An illumination device illuminates the measurement object at a triangulation angle relative to the longitudinal axis, and a sensor device detects radiation from the illumination device that is incident on the sensor device through the objective. | 02-13-2014 |
20140236520 | CALIBRATING AND OPERATING ROTARY DEVICES, IN PARTICULAR FOR ROTATING PROBE HEADS AND/OR PROBES OF COORDINATE MEASURING MACHINES - A measuring arrangement is calibrated for determining rotational positions of a rotary device that has a first part and a second part which can be rotated relative to the first part about a rotational axis. Rotational positions of the first part relative to the second part and/or rotational positions of the second part relative to the first part are detected using a plurality of sensors distributed about the rotational axis. A respective measurement signal corresponding to each detected rotational position is generated such that redundant information on the rotational positions of the first part and the second part relative to each other is provided. The redundant information on the rotational position(s) are analyzed such that effects of a translational movement of the first and the second part relative to each other are corrected, the translational movement running transverse to the extension of the rotational axis. | 08-21-2014 |
20140259715 | METHOD FOR COUPLING TWO SYSTEM COMPONENTS OF A MEASURING DEVICE, IN PARTICULAR A COORDINATE MEASURING DEVICE - A method for coupling a first system component and a second system component of a coordinate measuring device for determining by means of at least one sensor the three-dimensional coordinates of an object to be measured. An interface arrangement is provided between the first system component and the second system component. The interface arrangement comprises an electrical interface, formed from at least two electrical transmission paths, for transmitting a first electrical voltage between the first system component and the second system component, and at least one optical interface formed from light waveguides. The at least one sensor is supplied with the first electrical voltage via the two electrical transmission paths of the electrical interface. An analog measurement signal from the sensor is converted into a digital measurement signal. The digital measurement signal is transmitted by means of the light waveguides of the optical interface. | 09-18-2014 |
20150043013 | ILLUMINATION MODULE FOR A COORDINATE MEASURING MACHINE - An illumination module for a coordinate measuring machine for measuring a workpiece by means of an optical sensor, wherein the illumination module comprises a main body having a sensor side and a workpiece side, wherein the illumination module comprises on the main body at least one illumination arrangement for illuminating the workpiece, and wherein the at least one illumination arrangement has an emission characteristic with a specific emission angle and a light intensity profile within the emission angle, wherein the light intensity profile of the at least one illumination arrangement within the emission angle is asymmetrical. The present invention furthermore relates to a coordinate measuring machine comprising such an illumination module. | 02-12-2015 |
20150052767 | METHOD AND DEVICE FOR REDUCING ERRORS IN A TURNING DEVICE DURING THE DETERMINATION OF COORDINATES OF A WORKPIECE OR DURING THE MACHINING OF A WORKPIECE - A method reduces errors in a turning device during a determination of coordinates of a work piece or during machining of the work piece. The turning device allows a rotational movement of the work piece about a rotation axis of the turning device. The method includes measuring errors in the turning device on account of deviations between actual positions and actual orientations of the rotation axis, on the one hand, and corresponding ideal positions and ideal orientations of the rotation axis, on the other hand, in a range of rotation angles. Expected error values of the turning device are determined from error measurements and are used to correct the turning device. | 02-26-2015 |
20150055143 | REPLACEABLE ILLUMINATION MODULE FOR A COORDINATE MEASURING MACHINE - An illumination module for a coordinate measuring machine for measuring a workpiece by means of an optical sensor, wherein the illumination module comprises a main body having a sensor side and a workpiece side, wherein the sensor side has a first interface device at least for the sensor-side coupling of the illumination module in a defined position, and wherein the illumination module comprises at least one illumination arrangement for illuminating the workpiece. Furthermore, the main body has the form of a ring having a free central region and an edge region, wherein the at least one illumination arrangement and the first interface device are arranged in the edge region. | 02-26-2015 |
20150061170 | METHOD AND ARRANGEMENT FOR PRODUCING A WORKPIECE BY USING ADDITIVE MANUFACTURING TECHNIQUES - A method and an arrangement for producing a workpiece using additive manufacturing techniques involve in-process measurement in order to determine individual characteristics of one or more workpiece layers. In particular, dimensional and/or geometrical characteristics of a workpiece layer are measured before the next workpiece layer is produced. Advantageously, the measurement results are fed back into the production process in order to increase accuracy and precision of the production process. | 03-05-2015 |