Transponder and sensor apparatus for sensing and transmitting ve

Details Transponder and sensor apparatus for sensing and transmitting ve Transponder and sensor apparatus for sensing and transmitting ve

1995-03-10

1998-03-24

Hofsass, Jeffery

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340442, 340445, 34082554, 731464, 731465, B60C 2300

Patent

active

057317542

ABSTRACT:
A transponder and sensor apparatus with on-board power supply is mounted in or on a vehicle tire. A pressure sensor, a temperature sensor and a tire rotation sensor are mounted in a housing along with the transponder, the power supply and an antenna. Upon receiving an interrogation signal from a remote interrogator, the transponder activates the sensors to sense tire pressure and temperature and then backscatter-modulates the radio frequency signal from the interrogator with the tire condition parameter data from the sensors to return the backscatter modulated signal to the interrogator.

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Koelle et. al., "Short Range Radio Telemetry . . . Using Modulated Backscatter", IEEE, Aug. 75, pp. 1260-1261.

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