基于STM32控制器的汽车轴温检测系统设计

Design of Automobile Axle Temperature Detection System Based on STM32 Controller

为了能够实时对汽车传动系统变速箱温度进行检测,提高汽车运行过程中的安全性能,设计了基于STM32控制器的温度采集系统;利用P_1100采集齿轮箱润滑油的温度,通过STM32控制卡串口输出将温度数据发送至上位机中,利用LabVIEW编写的监控界面实时的显示温度曲线,并将采集的数据存储在Excle表单中;利用Matlab对数据进行卡尔曼滤波,能够有效地滤除磁干扰信号,同时在单位时间内对温度曲线求导,检测油温上升是否正常;实验结果表明,基于STM32控制器的汽车轴温检测系统动态性能高,响应时间t<50 ms,温度分辨率δ≤0.01℃。满足对汽车传动系统轴温检测的使用要求。

For detecting the real time temperature gear-box of automotive transmission, enhancing the security in the moving process of automotive, the temperature sampling system was designed based on controller of STM32. The temperature of lubricating oil in gear case was detected by PT100, the temperatrue data was sent to the upper monitor by the serial port of the control card STM32, the temperature curve could displaied by monitoring interface , which was worked out by LabVIEW, and the collected data was keep in Excle. Do the Kal- man filtering to the data by Matlab, so that the magnetic interference signal filtered availably, achieved the differential coefficient of the temperatrue curve in unit time in the meantime, detected whether the oil temperature was normal. The experimental result showed that, the dynamic property of the system of automotive axle temperature is high, the response time t〈50ms, the temperature resolution δ≤0.01℃, so that the operating requirement of the axle temperature of automotive transmission system was satisfied.