TIRE WEAR DETECTION DEVICE
First Claim
1. A tire wear detection device comprising:
- a wear detector that detects wear of a tread of a tire, which is fitted to a wheel of a vehicle, wherein the wear detector is embedded in the tread and includes a piezoelectric element, which generates a voltage signal in correspondence with an external impact, and a signal generator, which generates a radio wave signal from the voltage signal generated by the piezoelectric element;
a sensor unit arranged on the wheel, wherein the sensor unit includesa pressure sensor, which detects an internal air pressure of the tire,a reception unit, which receives the radio wave signal generated by the signal generator, anda transmission unit, which transmits through wireless communication a pressure data signal indicating the internal air pressure detected by the pressure sensor, generates a wear data signal indicating a wear state of the tire based on the radio wave signal received by the reception unit, and transmits through wireless communication the wear data signal; and
a receiver unit that receives the pressure data signal and the wear data signal from the sensor unit, wherein the receiver unit is arranged on a body of the vehicle.
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Abstract
A tire wear detection device includes a wear detector embedded in a tread of a tire, a sensor unit arranged on a wheel, and a receiver unit arranged on a vehicle body. The wear detector includes a piezoelectric element and a resonance circuit, which generates a radio wave signal from a voltage signal generated by the piezoelectric element. The sensor unit transmits through wireless communication a pressure data signal indicating an internal air pressure of the tire, generates a wear data signal indicating a wear state of the tire based on the received radio wave signal, and transmits through wireless communication the wear data signal. The receiver unit receives the pressure data signal and the wear data signal from the sensor unit.
31 Citations
11 Claims
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1. A tire wear detection device comprising:
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a wear detector that detects wear of a tread of a tire, which is fitted to a wheel of a vehicle, wherein the wear detector is embedded in the tread and includes a piezoelectric element, which generates a voltage signal in correspondence with an external impact, and a signal generator, which generates a radio wave signal from the voltage signal generated by the piezoelectric element; a sensor unit arranged on the wheel, wherein the sensor unit includes a pressure sensor, which detects an internal air pressure of the tire, a reception unit, which receives the radio wave signal generated by the signal generator, and a transmission unit, which transmits through wireless communication a pressure data signal indicating the internal air pressure detected by the pressure sensor, generates a wear data signal indicating a wear state of the tire based on the radio wave signal received by the reception unit, and transmits through wireless communication the wear data signal; and a receiver unit that receives the pressure data signal and the wear data signal from the sensor unit, wherein the receiver unit is arranged on a body of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification