External tire gauge and antenna structure thereof

Abstract

The invention discloses an external tire gauge and an antenna structure thereof. The tire gauge is internally equipped with a circuit, a sensor and a base, wherein the circuit board is used for integrating a control circuit; the sensor is connected with the control circuit and used for detecting the pressure in a tire; the base is mounted in match with an air valve; the antenna structure comprises an antenna stand and a metal conducting wire, wherein the antenna stand is connected with the base; the metal conducting wire is coiled on the antenna stand and electrically connected with the control circuit; the control circuit is used for introducing a detecting signal generated by the sensor to the metal conducting wire and emitting the signal to an external space through the metal conducting wire. According to external tire gauge, the antenna is relatively small in equivalent impedance; a cell with small power can be simply used for supplying power to emit and transmit a signal which reflects the pressure in the tire to the external space, and therefore, the service life of the cell is prolonged; in addition, the antenna is composed of a metal conducting wire, so that the impedance is roughly the same in all parts, and as a result, high definition of the transmitted and emitted signal can be ensured.

Description

【Technical field】 [0001] The invention relates to the field of sensing devices for tire internal pressure, in particular to an external tire pressure gauge and its antenna structure. 【Background technique】 [0002] In the existing external tire pressure gauge, the antenna used to transmit the signal representing the internal pressure of the tire detected by the pressure sensor to the outer space is usually composed of a metal conductor, a fixing piece, a base and a valve that are electrically connected to the control circuit. and other metal parts together to save the internal installation space of the tire pressure gauge, thereby reducing the overall size of the tire pressure gauge. [0003] However, when the materials, shapes, and sizes of the above-mentioned metal parts are different, or even some parts are in poor contact or damaged, the antenna as a whole has a relatively large impedance, and often requires a high-power battery to supply power to ensure that all The qu...

AI Technical Summary

Problems solved by technology

[0003] However, when the materials, shapes, and sizes of the above-mentioned metal parts are different, or even some parts are in poor contact or damaged, the antenna as a whole has a relatively large impedance, and often requires a high-power battery to supply power to ensure that all The quality of the signal to be transmitted

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