Henshaw, GB
David Geoffrey Henshaw, Derbyshire GB
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20090046762 | SENSOR APPARATUS - A sensor apparatus including a plurality of sensors, and a measurement device. The plurality of sensors being divided into sensor groups with each sensor group having a number of sensors. The groups being arranged such that the sensor groups are electrically matched. The sensors in a sensor group coupled in parallel with each other to form a sensor ladder. A measurement device is arranged to compare electrical signals from each sensor group and to output an indication signal, wherein the measurement device is coupled to each sensor ladder at an intermediate position and in that the coupling position of each sensor ladder are electrically equivalent to one another. Also provided by the present invention is a method of monitoring a plurality of sensors. | 02-19-2009 |
Iain Henshaw, Manchester GB
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20130219894 | HEATING SYSTEM - MODULAR - A boiler unit comprises an enclosure including: a first circuit of a first fluid heat exchange medium, the first circuit N having a heating device to heat the first medium, a boost heat exchanger, a valve and a first manifold; a second circuit of a second heating system fluid heat exchange medium, the second circuit having a flow and return port of the boiler unit, a second manifold and said boost heat exchanger for exchange of heat between said first and second heat exchanger media when said valve is open; a space in the enclosure receiving an auxiliary unit to be driven substantially exclusively by said first fluid heat exchange medium; and a boiler control unit to control operation of the heating device according to heat demand of the heating device and otherwise irrespective of the auxiliary unit when connected; and an organic rankine cycle (ORC) unit comprising: a third fluid heat exchange medium circuit, the circuit including a condenser adapted for connection to said second manifold to provide heat to said second circuit, a pump to circulate said third medium, an evaporator adapted for connection to said first manifold to heat said third medium and a rotary expander connected to an electricity generator; and an auxiliary control unit to control the ORC unit and operate said valve. | 08-29-2013 |
Iain Henshaw, Tewkesbury GB
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20110031068 | LUBRICATION OF POSITIVE DISPLACEMENT EXPANDERS - A method and system for lubricating a positive displacement machine operating as an expander of a compressed gas, comprising introducing into an expansion chamber of the machine a lubricant whose pour point temperature is greater than the operating temperature of the machine in the expansion chamber as determined by the expanding gas, which thus causes the lubricant to freeze-adhere to the internal surfaces of the expansion chamber, to become fluid under increased pressure at a point of contact of the working surfaces of the expander and then to refreeze when the surfaces separate. Considerable reduction in the quantity of lubricant is realised with the attendant advantage that dis-entrainment of lubricant from the gas exhausted from the machine is largely avoided. | 02-10-2011 |
Iain James Henshaw, Gloucestershire GB
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20080202116 | Method and Apparatus for Improving the Operation of Positive Displacement Expanders - A linear or rotary positive displacement expander ( | 08-28-2008 |
James Reynolds Henshaw, Gloucestershire GB
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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 |
20130256284 | LASER MARKING - A method and apparatus is disclosed for producing precision marks for a metrological scale in the form of a stainless steel ribbon. A laser is used to produce ultra-short pulses which have a fluence at the ribbon such that ablation takes place. The laser light can be scanned via scanner and the pitch of the marks can be controlled. The ablative technique causes little thermal input and improves the accuracy of the scale. | 10-03-2013 |
20150225858 | SUBSTRATE TREATMENT DEVICE AND METHOD AND ENCODER SCALE TREATED BY THIS METHOD - A method of forming an encoder scale for a measurement device is disclosed. The method comprises taking a laser and a substrate carrying an etch-resistant film. Parts of the etch-resistant film are removed by use of the laser, thereby forming a pattern on the substrate that defines an encoder scale, and the substrate is etched through the parts of the etch-resistant film that have been removed by the laser. | 08-13-2015 |
James Reynolds Henshaw, Stroud GB
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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 |
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 |
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 |
20150339505 | METHOD OF READING DATA - A method of reading data represented by a marking including at least one periodic nanostructure, the marking representing data using a polarisation property of the periodic nanostructure. The method includes detecting polarised electromagnetic radiation reflected from or transmitted by the nanostructure, and determining the data represented by the marking from the detected polarised electromagnetic radiation, wherein the method further includes applying polarised electromagnetic radiation to the nanostructure, and/or the detecting is performed using a polarisation-sensitive detector apparatus. | 11-26-2015 |
20150369637 | MEASUREMENT SCALE - A measurement scale device includes at least one scale marking, wherein the or each scale marking includes at least one periodic nanostructure that represents scale device information. | 12-24-2015 |
Michael Henshaw, Newport GB
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20120134752 | DEPLOYING SENSOR ARRAYS - There is described an apparatus and method for deploying a sensor array comprising a plurality of sensors ( | 05-31-2012 |
Michael Henshaw, Monmounthshire GB
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20100182872 | SEISMIC CABLE STRUCTURE - There is described an optical seismic cable ( | 07-22-2010 |
Michael Andrew Henshaw, Cheshire GB
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20100283826 | AUDIOVISUAL TERMINAL - An audiovisual terminal for use in videoconferencing or in providing online services is provided with a high resolution camera for capturing a video image of the operator. The camera is mounted at a distance from the operator and has a narrow field of view allowing a significantly clearer image of the operator to be obtained than is normally possible with a conventional webcam. The operator is also provided with a headset incorporating a microphone and a loudspeaker. The operator is provided with a primary display unit, displaying control information for operating the terminal and may also display visual or other date received from external sources. A secondary display is operable to display the video image captured by the camera. This allows the operator to monitor the operation of the camera during a videoconference call. | 11-11-2010 |
Robert Henshaw, Cambridge GB
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20100073088 | Joint optimisation of supply and bias modulation - There is disclosed a technique for controlling at least one amplification stage, comprising: selecting a linearity objective for the amplification stage; in dependence on an input signal to said amplification stage, determining a combination of supply input and bias input for the amplification stage in order to meet said linearity objective; and in dependence on there being more than one combination of supply input and bias input for meeting the linearity objective, selecting the combination that optimises a further system performance objective for the amplification stage. The further system performance objective may be one or more of: an efficiency objective; an envelope signal bandwidth objective; or a robustness to production tolerance objective. | 03-25-2010 |
20120068767 | Power supply arrangement for multi-stage amplifier - There is disclosed a multi-stage amplifier comprising: a first amplifier stage; a second amplifier stage; a first voltage supply stage arranged to provide a supply voltage to the first amplifier in dependence on an average power of a signal to be amplified; and a second voltage supply stage arranged to provide a supply voltage to the second amplifier in dependence on an instantaneous power of a signal to be amplified. | 03-22-2012 |
20120105152 | Joint optimisation of supply and bias modulation - There is disclosed a technique for controlling at least one amplification stage, comprising: selecting a linearity objective for the amplification stage; in dependence on an input signal to said amplification stage, determining a combination of supply input and bias input for the amplification stage in order to meet said linearity objective; and in dependence on there being more than one combination of supply input and bias input for meeting the linearity objective, selecting the combination that optimises a further system performance objective for the amplification stage. The further system performance objective may be one or more of: an efficiency objective; an envelope signal bandwidth objective; or a robustness to production tolerance objective. | 05-03-2012 |
20140167841 | Power supply arrangement for multi-stage amplifier - There is disclosed a multi-stage amplifier comprising: a first amplifier stage; a second amplifier stage; a first voltage supply stage arranged to provide a supply voltage to the first amplifier in dependence on an average power of a signal to be amplified; and a second voltage supply stage arranged to provide a supply voltage to the second amplifier in dependence on an instantaneous power of a signal to be amplified. | 06-19-2014 |
20140306756 | Power supply arrangement for multi-stage amplifier - There is disclosed a multi-stage amplifier comprising: a first amplifier stage; a second amplifier stage; a first voltage supply stage arranged to provide a supply voltage to the first amplifier in dependence on an average power of a signal to be amplified; and a second voltage supply stage arranged to provide a supply voltage to the second amplifier in dependence on an instantaneous power of a signal to be amplified. | 10-16-2014 |
Robert Henshaw, Cambourne, Cambridge GB
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20120229208 | Power Control - There is provided an amplification stage comprising: an input scaling block for scaling an input signal in dependence on an input scaling factor to generate a scaled version of the input signal; a power amplifier for generating an amplified version of the scaled input signal; an envelope detector for generating a signal representing the envelope of the input signal; an envelope scaling block for scaling the envelope signal in dependence on an envelope scaling factor to generate a scaled version of the envelope signal; a non-linear mapping block for generating a voltage representative of the supply voltage in dependence on the scaled envelope signal; a modulator for generating a power supply voltage for the amplifier in dependence on the voltage generated by the non-linear mapping block; and a power control block for maintaining a linear relationship between the envelope scaling factor and the input scaling factor. | 09-13-2012 |
Robert Henshaw, Cambourne GB
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20130222057 | POWER SUPPLY PRE-DISTORTION - There is disclosed a method of generating a supply voltage ( | 08-29-2013 |
20140132345 | Power Control - An amplification stage comprising: an input scaling block for scaling an input signal based on an input scaling factor to generate a scaled version of the input signal; a power amplifier for receiving the scaled version of the input signal and for generating an amplified version of said signal; an envelope detector for generating a signal representing the envelope of the input signal; an envelope scaling block for scaling the envelope signal based on an envelope scaling factor to generate a scaled version of the envelope signal; a non-linear mapping block for generating a voltage representative of the supply voltage based on the scaled envelope signal; a modulator for generating a power supply voltage for the amplifier based on the voltage generated by the non-linear mapping block; and a power control block for maintaining a linear relationship between the envelope scaling factor and the input scaling factor. | 05-15-2014 |
20150123733 | Power Control - An amplification stage comprising: an input scaling block for scaling an input signal in dependence on an input scaling factor to generate a scaled version of the input signal; a power amplifier for generating an amplified version of the scaled input signal; an envelope detector for generating a signal representing the envelope of the input signal; an envelope scaling block for scaling the envelope signal in dependence on an envelope scaling factor to generate a scaled version of the envelope signal; a non-linear mapping block for generating a voltage representative of the supply voltage in dependence on the scaled envelope signal; a modulator for generating a power supply voltage for the amplifier in dependence on the voltage generated by the non-linear mapping block; and a power control block for maintaining a linear relationship between the envelope scaling factor and the input scaling factor. | 05-07-2015 |
20150130535 | Joint optimisation of supply and bias modulation - There is disclosed a technique for controlling at least one amplification stage, comprising: selecting a linearity objective for the amplification stage; in dependence on an input signal to said amplification stage, determining a combination of supply input and bias input for the amplification stage in order to meet said linearity objective; and in dependence on there being more than one combination of supply input and bias input for meeting the linearity objective, selecting the combination that optimises a further system performance objective for the amplification stage. The further system performance objective may be one or more of: an efficiency objective; an envelope signal bandwidth objective; or a robustness to production tolerance objective. | 05-14-2015 |
Robert Astle Henshaw, Sudbury GB
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20160099742 | APPARATUS AND METHODS FOR CALIBRATION OF ENVELOPE TRACKERS - Apparatus and methods for calibration of envelope trackers are provided. In one embodiment, a power amplifier system includes a VGA that amplifies an RF input signal to generate an amplified RF input signal, a power amplifier that amplifies the amplified RF input signal to generate an RF output signal, and an envelope tracker that generates a supply voltage for the power amplifier. The envelope tracker includes a scaling module that generates a scaled envelope signal based on a power control level (PCL) signal and an envelope signal that changes in relation to an envelope of the RF input signal. The envelope tracker further includes a calibration module that controls an amount of scaling of the scaled envelope signal based on calibration data to compensate for an envelope amplitude misalignment of the envelope tracker. The envelope tracker controls the voltage level of the supply voltage based on the scaled envelope signal. | 04-07-2016 |
Robert Astle Henshaw, Suffolk GB
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20120200354 | APPARATUS AND METHODS FOR ENVELOPE TRACKING CALIBRATION - Apparatus and methods for envelope tracking calibration are provided. In one embodiment, a method of calibrating an envelope tracker having an envelope shaping table generated at a desired gain compression of a power amplifier is provided. The method includes generating a supply voltage for the power amplifier using the envelope tracker, operating the supply voltage of the power amplifier at a first voltage level associated with substantially no gain compression of the power amplifier, and measuring an output power of the power amplifier at the first voltage level. The method further includes decreasing a voltage level of the supply voltage one or more times and measuring the output power at each voltage level, determining a second voltage level of the power amplifier associated with a gain compression equal to about that of the desired gain compression, and calibrating the envelope tracker based on the determination. | 08-09-2012 |
20150155834 | APPARATUS AND METHODS FOR CALIBRATING ENVELOPE TRACKERS - Apparatus and methods for envelope tracking calibration are provided. In one embodiment, a power amplifier system includes a power amplifier, an envelope tracker that generates the power amplifier's supply voltage, a power detector, and a calibration module. The envelope tracker includes an envelope shaping table generated at a desired gain compression and a scaling module that scales an amplitude of an envelope signal. The power detector measures the power amplifier's output power, and the calibration module provides calibration data to the scaling module to change the scaling of the envelope signal's amplitude. The calibration module sets the calibration data to a first value corresponding to a supply voltage level associated with substantially no gain compression, and reduces the supply voltage level by changing the calibration data until the power detector indicates that the gain compression of the power amplifier is about equal to the desired gain compression. | 06-04-2015 |