Tire pressure monitoring and road surface information intelligent sensing platform and method based on CAN network

Abstract

The invention discloses a tire pressure signal acquisition and pavement information sensing platform based on an automobile CAN network and a monitoring method, and belongs to the technical field of automobiles. The method comprises the following steps: logic design on an FPGA part in the FPGA embedded system is carried out; an analog circuit is used for realizing a hardware circuit for processing a wheel speed signal; multi-thread distribution on a signal acquisition task under the Linux system is conducted; an FPGA embedded system is used, but is not limited to the embedded system; and three road surface monitoring models of road surface potholes, road surface roughness grading and road surface adhesion coefficient are achieved. According to the invention, FPGA end data acquisition read-write logic design, analog circuit design for wheel speed signal processing, task multi-thread scheduling under Linux, file system operation and the like are adopted. By utilizing the parallel computing characteristic of the FPGA and the stability characteristic of running a linux system under an ARM processor of an FPGA embedded system, the data acquisition of the whole platform is efficient and stable.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and more specifically relates to a tire pressure signal collection and road surface information perception platform and method based on the automobile CAN network. Background technique [0002] With the continuous improvement of modern technology, the number of cars is increasing day by day, and safety performance has become the most important consideration for owning a car. The tire is an important part of the car, the main consideration of the performance of the tire is the tire pressure. During the driving process of the car, there will be certain safety hazards if the tire pressure is too high or too low. Therefore, it is particularly important to monitor the tire pressure during the running of the car. TPMS is the tire pressure monitoring system, which monitors the tire pressure in real time, and gives an alarm to the air leakage and low air pressure, so as to ensure the driving safety ...

Images