| 摘要 |
PURPOSE: A data transmission method of a pressure sensor of a vehicle tire using change of the magnetic field is provided to simplify the structure, to improve the reliability and the durability, and to use semipermanently without auxiliary power by transmitting pressure data of the tire to a signal processing unit with the induced magnetic field. CONSTITUTION: A data transmitting method is composed of a sensor unit mounted in a tire(3) to detect pressure; a detecting unit generating current by forming the induced magnetic field to a pressure sensor coil(1); and a processing unit analyzing the signal by comparing with the reference value. The impedance value is changed according to pressure of the sensor unit, and measured by inducing with the coil outside the tire related to alternating current power during traveling. A pressure sensor(6) is installed in the tire to detect pressure of the tire, and connected to the winding coil. A winding coil(2) of a detecting unit detects the impedance value according to change of pressure.
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