A new non-contact combination sensor for measuring the torque and angle in the ESP and EPS system of the automobile was discussed. The principle and structure of the sensor were presented,and its output characteristic equation and sensitivity formula were derived. By making a measuring experiment, the effect of the exciting field intensity on measurement accuracy was analyzed , and its optimum value was got. When making a loading torsion test from 0 to 450 N · m , more sensitivity and more low error in linearity ,repeatability and hysteresis were achieved. At 500 r/min to 3 500 r/min,maximum rotational speed relative error was 0. 80%. The experimental result shows the sensor' s measurement precision is 1.0% ,and it can be used to measuring the torque and angle of the automobile steering wheel in the ESP and EPS system.%对一种可用于汽车ESP和EPS系统的转角与转矩组合式非接触传感器进行了研究.介绍了该传感器的结构和原理,推导了传感器的输出方程和灵敏度表达式.通过试验分析了传感器激磁磁场强度对转矩测量精度的影响,并得出了最佳激磁磁场强度.在0 ～450 N·m范围对传感器进行扭矩加载,得到了较高的测量灵敏度、线性度、重复度以及较低的迟滞静态误差;在500～3500 r/min范围内,转速最大相对误差为0.80％.试验数据显示:该传感器的精度能够达到1.0％,用于测量汽车方向盘的转矩和转角是可行的.
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