05581023 is referenced by 38 patents and cites 108 patents.

A pressure transducer for use with a pneumatic tire monitoring system includes a non-conductor resilient layer and a piezo-resistive/variably conductive layer having a composition which provides substantially constant resistant while under a substantially constant load. In a preferred embodiment, the piezo-resistive/variably conductive layer includes N-type semiconductor material, molybdenum disulfide, titanium, bismuth oxide, and alkyd or silicone binder. The transducer also includes conductive elements which are attached to a nonconductive substraight and electrically insulated from each other. The piezo-resistive/conductive layer contacts at least two of the conductive elements with a surface area which is responsive to a change in pressure so as to produce a variable resistant/conductives between the conductive elements. In one embodiment, the piezo-resistive/conductive layer is hemispherically shaped and divided to produce two independent sensing transducers. The output of these transducers may be combined to improve the response linearity of the transducer. One embodiment utilizes a log/anti-log circuit and a differential amplifier to combine the output of the separate but integral transducers.

Title
Pressure transducer for monitoring a pneumatic tire
Application Number
332200
Publication Number
5581023
Application Date
June 7, 1995
Publication Date
December 3, 1996
Inventor
Helene Laliberte
910 Sherwood Ct., Rochester, 48307
MI, US
Michael Handfield
910 Sherwood Ct., Rochester, 48307
MI, US
Agent
Brooks & Kushman P C
IPC
B60C 23/00
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