A new multifunction non-contact sensor based on nanocrystalline soft magnetic alloy was discussed, it can be used for measuring angle, rotational speed and torque. 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. At 25 ℃ ~ 100 ℃,the effect of shift in temperature on sensor output also was studied,and its temperature drift no-loading was 0.002% F. S/℃ ;When making a loading torsion test in 0 ~450 N·m,more sensitivity and more low error in linearity, repeatability and hysteresis were achieved. At 500 r/min ~3 523 r/min, maximum rotational speed relative error was 0. 60%. The experimental result shows the sensor's measurement precision is 1.0% ,and it can be used for general engineering applications.%对一种基于纳米晶软磁合金的非接触式,用于测量转角、转速和转矩的多功能传感器进行了研究.介绍了传感器的结构和原理,推导出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25℃～100℃范围研究了温度变化对传感器输出的影响,其零点温度漂移(25℃)为0.002％F.S/℃;在0～450 N·m范围进行转矩加载,得到了较高的测量灵敏度以及较低的线性度误差、重复度误差及迟滞静态误差；在500 r/min～3 523 r/min范围内,转速最大相对误差为0.60％.试验数据显示,该传感器的精度能够达到1.0％,对于一般工程应用是可行的.
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