Self-powered sensing module and tire pressure monitoring system using the same
First Claim
1. A tire pressure monitoring system (TPMS) for a vehicle comprising a plurality of tires, the TPMS comprising:
- a self-powered sensing module disposed in each tire to be deformed according to the rotation of the tire, comprising a sensor unit having at least one sensor for measuring at least one of a temperature, a pressure, and acceleration of the tires, a power unit generating a power by deforming mechanically according to the rotation of the tires and supplying the sensor with a power for actuation, and a transmitter unit transmitting data detected by the sensor; and
a main unit disposed in the vehicle and comprising a receiver unit receiving the data transmitted from the transmitter unit and a monitoring unit displaying the received data to a vehicle operator;
wherein the power unit comprises a piezoelectric power generator comprising a piezoelectric thin film; and
wherein the piezoelectric thin film comprises a plurality of first and second piezoelectric elements disposed at certain intervals in alternation and polarized into an anode and a cathode.
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Abstract
A tire pressure monitoring system (TPMS) having a self-powered sensing module having a sensor unit with at least one sensor for measuring at least one of a temperature, a pressure, and an acceleration in the tire, and a power unit generating a power by being deformed mechanically according to a rotation of the tire and supplying the sensor with a power required for actuating the sensor. The self-powered sensing module and the TPMS using the same are powered by the power unit generating the power owing to the mechanical deformation, without using a separate power supply. Hence, there is no need to replace a battery of the sensing module and maintenance costs are reduced.
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Citations
22 Claims
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1. A tire pressure monitoring system (TPMS) for a vehicle comprising a plurality of tires, the TPMS comprising:
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a self-powered sensing module disposed in each tire to be deformed according to the rotation of the tire, comprising a sensor unit having at least one sensor for measuring at least one of a temperature, a pressure, and acceleration of the tires, a power unit generating a power by deforming mechanically according to the rotation of the tires and supplying the sensor with a power for actuation, and a transmitter unit transmitting data detected by the sensor; and a main unit disposed in the vehicle and comprising a receiver unit receiving the data transmitted from the transmitter unit and a monitoring unit displaying the received data to a vehicle operator; wherein the power unit comprises a piezoelectric power generator comprising a piezoelectric thin film; and wherein the piezoelectric thin film comprises a plurality of first and second piezoelectric elements disposed at certain intervals in alternation and polarized into an anode and a cathode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A self-powered sensing module comprising:
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a sensor unit having at least one sensor for measuring at least one of a temperature, a pressure, and an acceleration of an object to be measured; and a power unit generating power by deforming mechanically according to an operation of the object and supplying the sensor with power required for actuating the sensor wherein the power unit comprises a piezoelectric power generator comprising a piezoelectric thin film; wherein the piezoelectric thin film comprises a plurality of first and second piezoelectric elements disposed at certain intervals in alternation and polarized into an anode and a cathode. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification