Research And Development Of Tire Pressure Monitoring System Based On DSP

The safety of driving a car is a hotspot to people. When a car is running at a high speed, tire blowout is one of the main reasons of the malignant traffic accidents. Running at a high speed for long hours under abnormal pressure, particularly low pressure, is the most primary cause of tire blowout. How to avoid tyre fault effectively is a urgent problem to be solved. Tyre pressure monitoring system emerges as time requires. The research climax was lifted in different countries. By right of advantages of low cost,stable performance and convenient installation, the inderct tyre pressure monitoring system will certainly be popular by getting consumers trust.The thesis first introduces the history, actuality and the future of TPMS, analyses the structure and work principle of existing direct and indirect TPMS, and puts forward a method of TPMS based on longitudinal stiffness. According to the dynamics theory of vehicle and the relation between tire pressure and the change of longitudinal stiffness, a tire mathematic model is established, through which monitoring tyre pressure indirectly can be realized with the estimation results of the longitudinal stiffness only using wheel speed signal.The thesis has designed the tire pressure monitoring system based on DSP, and adopted the digital signal processor—DEC2812V1.0 of TMS320F2812 based CCS2000 platform and SEED-XDS510 Emulator to do research and development on the hardware and software of the TPMS system, which have been simulated and debugged online. The research of this system can promote the development of tire pressure monitoring technique and has a high value of applying that can bring the enormous profits of economy and society.