Transense Technologies, Plc

Schott Ag

Instron Limited

Raymond David Lohr

Arthur John Leigh

David Daniel George Vile

Mark Lee

Victor Alexandrovich Kalinin

Victor Alexandrovich Kallnin

Thomas Fink

John Peter Beckley

Paul D Hayford

Alexander Thomas James Stopps

Paul Joseph Howse

Chanchal Singh Bahra

George Edward Andrew Bown

Thomas Dipl-Ing Fink

Victor Kalinin

A SAW sensor arrangement includes a transducer including a support for supporting a SAW device. The support includes a sensor location part located between two oppositely extending attachment parts. The SAW device is mountable to the sensor location part. The sensor arrangementincludes at least two spaced friction raisers. The sensor arrangement includes a clamp arrangement which applies a clamping force to clamp the sensor arrangement to an item. The sensor arrangement is arranged so that in use each of the friction raisers is located between a different one of the attachment parts and the item.

Saw sensor arrangements

A combined pressure and temperature sensor comprising a tubular memberof circular cross section having a closed end and an open end, the open end, in use, connecting to a pressurized environment such that the interior of the tubular member is exposed to the pressure, a flat or preferably a symmetrical distribution of flatsbeing formed on the outer cylindrical surface of the tubular member, and a sensor elementmounted on at least one said flat, which sensor elementis sensitive to the strains in the tubular wall of the tubular memberresulting the pressure in the interior thereof and the temperature of said tubular member.

High pressure sensor

A circular shaft having a platform formed on it by machining a circular flat into the surface of the shaft. A channel extends around the periphery of the circular flat with a depth in the range of 10 to 15% of the diameter of the shaft and in the range of 30 to 50% of the width/diameter of the platform. The width of the platform is 4 to 7% of the diameter of the shaft. A sensor is mounted on the platform, whereby the formation of the platform and surrounding channel reduces the strain arising in the device which is transferred to the sensor.

Apparatus for and method of attaching a strain sensing element to a substrate

Aspects of the present invention are directed to using surface acoustic wave (SAW) sensors mounted on a disc coupling component in a powertrain to measure the torque generated by an automobile engine. The sensor may be positioned and oriented on the disc coupling component so that the phase velocities of SAWs propagating through active elements of the SAW sensors are aligned with principal strain components due to torque in the disc coupling component. The torque may be calculated by determining the difference between resonant frequencies of the active elements to suppress common-mode interference factors. In addition, SAW resonant frequencies may be communicated in a non-contacting manner by utilizing rotary and stationary couplers employing radio frequency (RF) signals. Moreover, SAW sensors may be activated and interrogated by employing targeted RF pulses having different carrier frequencies at or near respective resonant frequencies of each resonator in a SAW sensor.

Torque measurement within a powertrain

The invention relates to a package for a strain sensor. The package includes a base part () from a strain hardened material, a central part () from an annealed material which carries glass fritted leadthroughs, and a lid part (), wherein the base part, the central part and the lid part are made from austenitic stainless steel AISI 304L as well as a method for producing such a package.

Package for strain sensor

A method is provided for measuring torque in a shaft of a drive line including a disc coupling component such as a flexplateor a flanged coupling, as well as a drive coupling system for carrying out the method. The disc coupling componentis connected between a drive inputand a drive output so that all torque transmitted between the input and output passes through said component. The disc coupling componenthas a radially extending portion, which may include a plurality of spokes, to which is attached a SAW based strain sensor which communicates with a stationary couplerfastened to an engine blockfor wireless transmission of data from the sensor, the strain sensor measuring the strain in the disc coupling componentfrom which the torque carried in the input shaftmay be calculated.

A device for measuring torsional distortion of a body comprises first and second clip portions each having a central part and two legs depending from the central part, each leg having adjacent the free end thereof a groove or projection for engaging a respective projection or groove () provided in the body () to mount the clip portion the body rotationally fastened therewith. A bridge interconnects the clip portion. The bridge is less stiff than the clip portions whereby relative rotational displacement of the clip portions caused by torsional distortion of the body will cause proportional deflection of the bridge. Means, for example a SAW device (), are provided for measuring the deflection of the bridge to provide an indication of the torsional distortion which produces the deflection of the bridge. Also () for the interior all of a hollow body.

Measuring torsional distortion with an easily applied clip device (saw)

A pressure monitor has a base and a lid secured to the base to define a substantially fluid tight chamber. At least part of the lid is flexible and forms a diaphragm which deflects responsive to changes in fluid pressure surrounding the monitor. A projection provided on the diaphragm transmits movement thereof to a distortable substrate located within the chamber. A first SAW device is mounted on the distortable substrate, and at least a second and third SAW device are mounted within the chamber. The second SAW device carried on a reference substrate section has its direction of propagation inclined at an angle to the direction of propagation of at least one of the first and third SAW devices. This way movement of the diaphragm induced by a change in pressure in the zone surrounding the monitor results in distortion of the distortable substrate, which is measurable by the SAW device mounted thereon, without distorting said reference substrate section.

Pressure monitor incorporating saw device

A load cell for use in dynamic testing apparatus for mechanically testing samples includes an accelerometer mounted in the load cell on the same axis as the line of action of the mechanical force applied to the specimen under test. The resultant signal from the combination of the normal output from the load cell and the output from the accelerometer compensates for errors introduced by the mass of the moving grip used to grip the specimen in the apparatus.

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Long Crendon, United Kingdom

Raymond David Lohr