Tire pressure monitoring system and method

Abstract

The invention provides a tire pressure monitoring system. The tire pressure monitoring system comprises a display alarming unit, vibration sensors, wheel speed sensors and a central processing unit, wherein the vibration sensors and the wheel speed sensors are connected to wheels; the central processing unit is used for storing stable vibration frequency signals of all the wheels under various conditions when the car moves and taking the stable vibration frequency signals as a rule base of vibration frequency data of the car; the central processing unit is used for taking vibration frequency signals and wheel speed signals, which are measured in real time, as input variables and inputting the input variables into a fuzzy controller to be calculated to obtain a difference value of stable-state data in a real-time vibration frequency signal and wheel speed signal rule base; and when the difference values of the vibration frequency signals and the wheel speed signals are more than a pre-set threshold value, the central processing unit transmits an alarming signal to the display alarming unit. The tire pressure monitoring system provided by the invention can be used for monitoring a tire pressure state through the measured vibration frequency signals and wheel speed signals of all the wheels; and the vibration frequency signals and the wheel speed signals are monitored at the same time and the judgment accuracy is high.

Description

technical field [0001] The invention relates to the field of automobile safety monitoring, in particular to a tire pressure abnormality monitoring system and method. Background technique [0002] At present, the tire pressure monitoring system mainly adopts the direct type tire pressure monitoring system. The direct type TMPS needs to install an additional in-tire sensor to measure the tire pressure, and the cost is relatively high. Due to the limitation of battery life, most vehicles are limited by cost and other reasons, which affects the use and promotion of tire pressure detection systems. [0003] The patent with the application number CN201320317512.1 provides a tire pressure monitoring device, which includes a pressure sensor installed on the tire to detect the tire pressure and / or a temperature sensor to detect the tire temperature, which is characterized in that , the tire pressure monitoring device also includes: [0004] a tire information processor, the tire in...

AI Technical Summary

Problems solved by technology

[0002] At present, the tire pressure monitoring system mainly adopts the direct type tire pressure monitoring system. The direct type TMPS needs to install an additional in-tire sensor to measure the tire pressure, which is expensive. At the same time, the direct measurement method uses wireless transmission, which is greatly affected by the weather and environment, and the service life is affected Due to the limitation of battery life, most vehicles are limited by cost and other reasons, which affects the use and promotion of tire pressure detection systems

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