Measuring and testing – Tire – tread or roadway – Tire inflation testing installation
Reexamination Certificate
2006-05-09
2006-05-09
Lefkowitz, Edward (Department: 2855)
Measuring and testing
Tire, tread or roadway
Tire inflation testing installation
C073S146300, C073S756000
Reexamination Certificate
active
07040154
ABSTRACT:
A motion sensor system for a tire pressure monitoring system (TPMS) that uses a piezoelectric sensor to sense vibration as an indication of wheel motion. The TPMS uses the detected vibration to transition between operation modes. In one embodiment, the TPMS has a motion mode and a park mode, wherein the TPMS has increased activity (e.g. sampling tire pressure at a higher rate and transmitting tire pressure at a higher rate) during the motion mode than in the park mode.
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Mark L. Shaw, “Motion Sensing Techniques and Analysis for Direct Tire Pressure Monitoring,” Society of Automotive Engineers, Inc., Sensor Products Division, TSPG, SPS, MOTOROLA, Inc., pp. 1-9 (2003).
Mark L. Shaw, “Considerations to Improve Battery Life in Direct Tire Pressure Monitoring,” Society of Automotive Engineers, Inc., Sensor Products Division, TSPG, SPS, Motorola, Inc., 10 pgs, (2002).
August Richard John
Shaw Mark L.
Bonanto George P
Dolezal David G.
Freescale Semiconductor Inc.
Hill Daniel D.
Lefkowitz Edward
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