Study On Tire Pressure Monitoring System Of Vehicles

In order to design a set of TPMS,which is simple,easy-realizing and safe.This paper introduces the indirect TPMS.The main contents is as following:Firstly,introduce the collection course of wheel speed.The wheel speed is collected by the PTS HSI mode of the 80C196KC.Secondly, introduce the three main errors:quantization error,the gear error and the abnormal point.Thirdly,we use the model of vertical vibrations to design the radii method.Lastly,we change the unequal time distance wheel speed to equal time distance wheel speed.According to the model of torsional vibrations,we introduce the spectral estimation method to design TPMS.When the tirepressure is leaking,the peakvalue of the periodogram of the wheel speed will move to the real axis.So we designed TPMS which is based on radii method and spectral estimation method.The evaluation indicates that they are feasible,and has good foreground.