Passive tire power generating device and tire parameter detecting system

Abstract

The invention provides a passive tire power generating device and a tire parameter detecting system. The temperature difference between the high temperature generated when a tire operates and the temperature of the external environment is used by the power generating device, electric energy is generated through a thermoelectricity collecting piece, and the electric energy provides a power supply through a storing and converting circuit and a transmitting circuit. The tire parameter detecting system comprises a parameter sensor, a wireless transmitter and a central receiver module. The passive tire power generating device is used for providing electric energy for the tire parameter sensor and the wireless transmitter. The passive tire power generating device is installed on the tire, and the tire parameter sensor is installed in the tire to measure the parameters of the tire. Parameter information of the tire is transmitted to the central receiver module from the interior of the tire through the wireless transmitter, and the tire parameters are then displayed. The problem of power supply of a tire pressure detector in a direct type tire pressure monitoring system is solved; the tire parameter detecting system is different from other passive tire parameter detecting systems in terms of tire parameter detection and is independent of tire pressure and vehicle vibration work; an energy transmission coil which is high in cost and complicated in installation does not need to be introduced into the system.

Description

technical field [0001] The invention relates to a vehicle tire parameter detection system, in particular to a parameter detection system with a passive tire power generation device. [0002] Background technique [0003] Parameters such as pressure, temperature, and humidity of automobile tires during operation have a very important impact on the safety of vehicles, and the acceleration of tires during operation is an important parameter that determines the operating state of the system. Therefore, the detection of various car tire parameters is related to the life of the tire and the driving safety of the car, and has become the focus of research in the technical field of the industry. Among them, the tire pressure monitoring system (TPMS), which mainly focuses on tire pressure detection, has received more attention from academia and industry. In order to promote the industrialization of TPMS products, a series of TPMS-related standards have been promulgated at home and a...

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Problems solved by technology

However, the cost of surface acoustic wave materials is relatively expensive, and the manufacturing process requirements are relatively high; the electric energy that the vibration power generation device can generate is limited by the vibration energy, and the electric energy it provides may be able to meet the requirements when the road surface is bumpy and undulating, but it is not stable on asphalt roads or On the expressway, the electric energy provided by it is difficult to meet the requirements of the detector; the tire pressure detection power supply device of the wireless energy transmission method needs to install magnetic field coils on the car and the wheel hub at the same time, which greatly increases the system cost, and the coil is installed on the wheel hub to supply the tires. The production and performance testing of the coil have brought great difficulties, and the engineering feasibility is not good.

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