Tire pressure monitoring system and its control method

Abstract

The present invention relates to the technical field of automobile safety, in particular to a tire pressure monitoring system, which includes a controller, a low-frequency trigger and a tire pressure sensor. The controller outputs a control command to the low-frequency trigger, and the low-frequency trigger generates a low-frequency signal to trigger the tire pressure. The tire pressure sensor collects tire pressure information and outputs it to the controller. The low-frequency trigger includes a resistor R, a capacitor C, and an inductor L connected in series in sequence. The suspended end of the resistor R is connected to the power supply through the first electronic switch and passed through The second electronic switch is grounded, the suspension end of the inductor L is connected to the power supply through the third electronic switch and grounded through the fourth electronic switch; the controller outputs control commands to control the opening or closing of the first, second, third and fourth electronic switches, And the control method of the system is disclosed. Improve the triggering ability of the low-frequency trigger to ensure that the tire pressure sensor can be triggered by the low-frequency trigger when the tire rotates to any position.

Description

technical field [0001] The invention relates to the technical field of automobile safety, in particular to a tire pressure monitoring system and a control method thereof. Background technique [0002] Vehicles are now an important means of transportation. With the expansion of the application range and the gradual increase in the number of vehicles, and the rapid development of the high-altitude highway network, the driving speed of vehicles has also increased accordingly, so the requirements for the reliability and safety of vehicles are also increasing. improve. Most of the traffic accidents caused by tires and other reasons are caused by tire pressure problems. With the rapid increase of road traffic volume, the overloading scene is becoming more and more serious, causing serious damage to roads, bridges, and other facilities and causing casualties. Accidents happen frequently. Most of these traffic accidents are caused by reasons such as overpressure, underpressure, hi...

AI Technical Summary

Problems solved by technology

During the running of the vehicle, since the tire pressure sensor rotates with the tire in real time, and the position of the low-frequency trigger is relatively fixed, the distance between the tire pressure sensor and the low-frequency trigger changes in real time. When the distance from the low-frequency trigger is far away, it is easy for the low-frequency trigger to fail to trigger the tire pressure sensor, which will affect the accuracy and reliability of tire pressure monitoring

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