Research Of Stress Test System In Vehicle's Suspensions Based On CAN Bus Technology

With the development of the vehicle electronic technique, more and more people pay attention to the comfort and security of the vehicles. Suspension system is the most important ingredients of the vehicles and the performance is a key factor, which affect the smooth ride, the operational stability and the security of the vehicles. Improving the performance of the vehicle's suspensions to ensure the comfort, security and dependability of the working vehicles is one of the researching contents in the field of vehicle electronics. Therefore, it's necessary to be real time measured and inspected to some important performance parameters of vehicle's suspensions, such as the flexural torque, moment of torsion.The paper is combined with scientific research item—the dynamic stress test to flexure and torsion of the cross arm of vehicle's suspensions. According to the demand of system design and considering the large data transmission, the cost and feature of Field-bus, CAN Bus is adopted here as a mean of data transport in choosing detailed scheme and the stress test system in vehicle's suspensions based on CAN Bus technology is designed.Analyzing the development of present situation of vehicle electronic technique and bus technology and researching the CAN Bus technology, the design and realizing method of the hardware and software to CAN modular of dynamic strain data collecting system in dynamic stress test of vehicle's suspensions are completed. Hardware platform uses 32 bits ARM as its CPU, extended UART bus and CAN Bus, making the circuit plate. About software platform, drivers of CAN controller compiled are mainly designed. Finally, Aiming at CAN Bus transmission distance and transmission performance experiment, It carries on experimental verification and test results prove that CAN network nodes meet the need of dynamic stress test perfectly and the scheme is feasible and correct. The system works well in practice now.