Passive automobile tyre early warning system

Abstract

The invention relates to an early warming system for passive automobile tire comprising an air pressure sensor, a temperature sensor, a signal collecting-emitting module and a power generation device; the air pressure sensor and the temperature sensor are electrically connected with the signal collecting-emitting module and the power generation device comprises a power generator, a voltage stabilizing module and a rechargeable battery. The alternate current output by the power generator is input into the rechargeable battery after going through a voltage stabilizing circuit for voltage stabilizing and filtering and the rechargeable battery and the signal collecting-emitting module are electrically connected with each other to provide electricity to the signal collecting-emitting module. In the early warming system for passive automobile tire of the invention, the mechanical energy generated by the tire movement is turned into electrical energy through the power generation device so as to realize the constant power supply to the early warming system for passive automobile tire, thus solving the problems of discontinuous power supply due to the short service life of solid battery and difficult arrangement caused by centrifugal force generated in speedy rotation of a launching box in vehicle.

Description

technical field [0001] The invention relates to a passive automobile tire early warning system, in particular to an automobile tire early warning system powered by a generator. technical background [0002] There are two types of tire pressure monitoring systems (TPMS), direct and indirect. [0003] The indirect tire pressure monitoring system is realized by using the rotation speed of the tire and the conversion relationship between the rotation speed and the air pressure. The advantage is that it does not need solid-state battery power supply, but can be powered by the car's power supply, and has a long service life. However, the measurement accuracy of the indirect tire pressure monitoring system is not high, and the temperature of the tires cannot be monitored, let alone large buses and heavy vehicles with double tires. [0004] The direct tire pressure monitoring system uses a resistance temperature sensor and a resistance / capacitance to form an air pressure sensor. Th...

AI Technical Summary

Problems solved by technology

The direct tire pressure monitoring system has the advantages of high measurement accuracy and real-time monitoring of the air pressure and temperature in the tire, but there are still the following disadvantages: continuous power supply is necessary, and this chip uses a solid-state battery, so it cannot meet the requirements of long-term use. And because the medium in the tire is air, and the environment is very harsh, it is difficult to install and replace the battery, which makes the tire pressure monitoring system prone to failure

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