TIRE INFORMATION MONITORING SYSTEM AND TIRE INFORMATION TRANSMITTER
First Claim
1. A tire information transmitter that is mounted on tires and wirelessly transmits tire information to a vehicle-side device, the tire information transmitter comprising:
- a first antenna;
a sensor circuit configured as a resonance circuit;
a transceiver circuit that is connected between the first antenna and the sensor circuit, the transceiver circuit extracting an excitation signal for exciting the resonance circuit from a carrier wave signal received through the first antenna to input the extracted excitation signal to the sensor circuit, and carrying a resonance signal generated in the sensor circuit in the carrier wave signal to wirelessly transmit the carrier wave signal through the first antenna;
a second antenna;
a rectifier circuit for rectifying a high-frequency reception signal output through the second antenna;
a memory circuit having stored therein information on the tires and/or the sensor circuit;
a control circuit that is supplied with electricity from the rectifier circuit and reads the information on the tires and/or the sensor circuit from the memory circuit; and
a modulation circuit that is connected to the first antenna and modulates the carrier wave signal received through the first antenna with the information on the tires and/or the sensor circuit, read by the control circuit.
1 Assignment
0 Petitions
Accused Products
Abstract
A tire information monitoring system composed of a tire information transmitter mounted on tires and a vehicle-side device installed in a vehicle body is provided. The tire information transmitter comprises: a first antenna; a sensor circuit configured as a resonance circuit; a transceiver circuit that is connected between the first antenna and the sensor circuit, the transceiver circuit extracting an excitation signal for exciting the resonance circuit from a carrier wave signal received through the first antenna to input the extracted excitation signal to the sensor circuit, and carrying a resonance signal generated in the sensor circuit in the carrier wave signal to wirelessly transmit the carrier wave signal through the first antenna; a second antenna; a rectifier circuit for rectifying a high-frequency reception signal output through the second antenna; a memory circuit having stored therein information on the tires and/or the sensor circuit; a control circuit that is supplied with electricity from the rectifier circuit and reads the information on the tires and/or the sensor circuit from the memory circuit; and a modulation circuit that is connected to the first antenna and modulates the carrier wave signal received through the first antenna with the information on the tires and/or the sensor circuit, read by the control circuit.
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Citations
4 Claims
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1. A tire information transmitter that is mounted on tires and wirelessly transmits tire information to a vehicle-side device, the tire information transmitter comprising:
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a first antenna; a sensor circuit configured as a resonance circuit; a transceiver circuit that is connected between the first antenna and the sensor circuit, the transceiver circuit extracting an excitation signal for exciting the resonance circuit from a carrier wave signal received through the first antenna to input the extracted excitation signal to the sensor circuit, and carrying a resonance signal generated in the sensor circuit in the carrier wave signal to wirelessly transmit the carrier wave signal through the first antenna; a second antenna; a rectifier circuit for rectifying a high-frequency reception signal output through the second antenna; a memory circuit having stored therein information on the tires and/or the sensor circuit; a control circuit that is supplied with electricity from the rectifier circuit and reads the information on the tires and/or the sensor circuit from the memory circuit; and a modulation circuit that is connected to the first antenna and modulates the carrier wave signal received through the first antenna with the information on the tires and/or the sensor circuit, read by the control circuit. - View Dependent Claims (2, 3)
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4. A tire information monitoring system composed of a tire information transmitter mounted on tires and a vehicle-side device installed in a vehicle body,
wherein the tire information transmitter comprises: -
a first antenna; a sensor circuit configured as a resonance circuit; a transceiver circuit that is connected between the first antenna and the sensor circuit, the transceiver circuit extracting an excitation signal for exciting the resonance circuit from a carrier wave signal received through the first antenna to input the extracted excitation signal to the sensor circuit, and carrying a resonance signal generated in the sensor circuit in the carrier wave signal to wirelessly transmit the carrier wave signal through the first antenna; a second antenna; a rectifier circuit for rectifying a high-frequency reception signal output through the second antenna; a memory circuit having stored therein information on the tires and/or the sensor circuit; a control circuit that is supplied with electricity from the rectifier circuit and reads the information on the tires and/or the sensor circuit from the memory circuit; and a modulation circuit that is connected to the first antenna and modulates the carrier wave signal received through the first antenna with the information on the tires and/or the sensor circuit, read by the control circuit, wherein the vehicle-side device wirelessly transmits a carrier wave signal that does not contain a frequency signal at which the resonance circuit resonates and receives the carrier wave signal modulated with the information on the tires and/or the sensor circuit in the modulation circuit to thereby acquire the information, and wherein the vehicle-side device wirelessly transmits a carrier wave signal that contains an excitation signal for exciting the resonance circuit and receives a carrier wave signal carrying a resonance signal of the resonance circuit from the tire information transmitter.
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Specification