速度和载荷对频率法胎压监测系统性能的影响  

Influence of the speed and load on the tire-pressure monitoring-system performances by frequency method

作　　者：夏怀成[1] 韩向阳 胡宽答 XIA Huaicheng;HAN Xiangyang;HU Kuanda(School of Vehicle and Energy,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]燕山大学车辆与能源学院,中国秦皇岛066004

出　　处：《汽车安全与节能学报》2022年第3期429-437,共9页Journal of Automotive Safety and Energy

摘　　要：为推广频率法胎压监测系统实际使用,研究了车辆速度和载荷变化对振动频率的影响。以频率法胎压监测原理为基础,设计轮速传感器信号采集电路;对轮速信号异常点和轮齿误差进行修正。通过Fourier变换和模型参数估计2种方法,在40~100 km/h速度区间,在空载(仅前排2人)、半载(4人)、满载(4人加后备箱50 kg)3种载荷状态下,计算了扭转振动频率。进行了试验测试。统计测试结果表明:自由驾驶状态4轮缺气报警时间为6~8 min,速度补偿前报警时间为12~15 min;不同载荷无误报。该方法解决了报警时间过长和误报问题,提高了胎压监测系统性能。This paper investigated the influence of vehicle speed and load changes on vibration frequency to popularize the practical application of the tire-pressure monitoring-system with a frequency method.A signalacquisition circuit of wheel-speed sensors was designed based on the tire-pressure monitoring principle with the frequency method.The wheel-speed signal abnormal points and the gear-tooth errors were corrected.The torsional vibration frequency was calculated by the Fourier transform and by the model parameter estimation,in the speed of 40~100 km/h,under three load states including no-load(2 people in front row),half-load(4 people),and full-load(4 people plus 50 kg in trunk).The experimental tests were carried out.The statistical test results showed that the four-wheel lack of air alarm time in the free driving state was 6~8 min,and the alarm time before speed compensation was 12~15 min;there were no false alarms for different loads.The problem of too long alarm time and false alarm is solved.Therefore,this method improves the performances of tire-pressure monitoring-system.

关 键 词：汽车安全 胎压监测 轮速信号 振动频率 谱估计 

分 类 号：U461.91[机械工程—车辆工程]