Transense Technologies, Plc

Michelin Recherche Et Technique S.a.

Bryn James Dixon

Victor Alexandrovich Kalinin

John Peter Beckley

Aldrian Simon Nowell

A method of wirelessly interrogating a sensing device comprising a plurality of passive sensors, to determine a measurement parameter, comprises the steps of repeatedly interrogating the sensing device using a predetermined transmission signal and detecting the response; estimating the measurement parameter for each sensor by means of an analysis of the data accumulated as a result of the interrogation step, and determining the average of the parameters derived from the estimating step for each sensor, using a weighted average, in which the weightings depend on the amplitude of the sensor response. The measurement parameter may be a resonant frequency where the passive sensors are resonant devices, and the sensors may be SAW devices.

Interrogation method for passive wireless sensor interrogation system

A tire pressure monitoring system (TPMS) sensor assemblyhas a housing, a pressure sensor mounted in the housingand an antennaconnected to the sensor and extending exteriorly of the housingfor effecting wireless communication between the sensor and a remote module. The antennais moveable between a folded position in which it extends around at least a part of the housingso as to lie substantially in the plane of the housingand an erect position in which it upstands from the housingso as, in use, to extend into the inflation area formed between a wheel and tire. The antennais biased towards its erect position, and further includes a releasable restraining strapfor restraining the antennain its folded position.

Stowable antenna for TPMS sensor

The present invention relates to a method and apparatus for assessing the condition of a wheel particularly, but not exclusively, to a method and apparatus for assessing the condition of a tire rotating on a vehicle wheel. Apparatus is provided comprising a plurality of antennas () for transmitting an interrogation signal to a sensor (), the sensor being mounted to a wheel to be assessed and being adapted to detect the condition of the wheel; wherein the antennas are arranged in a line along a path to be followed by a wheel to be assessed.

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Bletchley, United Kingdom

Bryn James Dixon