Abstract:

To improve the versatility of sensor, a new non-contact sensor to measure angle, rotational speed and torque at the same time was discussed. First, the structure and principle based on magneto-elastic effect of nanocrystalline soft magnetic alloy were presented. Second its output mathematical model and sensitivity formula were derived. Finally a measuring experiment was made at 25~100℃ temperature range , 0～450N·m torque range and 500～3525r/min rotational speed range. The testing results are that the sensor's temperature drift is as 0.002 03% F.S/℃ for 25℃, its maximum linearity 0.81% F.S, repeatability error 0.50% F.S, hysteresis error 0.85% F.S and rotational speed maximum relative error 0.70%. The experimental results also show the sensor's sensitivity is as 1.26mV/N·m and measurement precision is as 1.0%, so it can be used for general engineering applications.

Key words: sensor, nanocrystalline soft magnetic alloy, multifunction;torque, rotational speed, angular displacement

摘要：

为提高传感器的多功能性,对一种可同时测量转角、转速和转矩的非接触式传感器进行了研究。首先,论述了传感器的结构和基于纳米晶软磁合金压磁效应的测量原理,然后推导出传感器的输出数学模型与灵敏度表达式。最后,在25～100℃温度范围、0～450N·m转矩范围及500～3525r/min范围内进行试验,得出相对于25℃的零点温度漂移为0.002 03%/℃（满量程）,满量程最大线性度、重复度及迟滞静态误差分别为0.81%、0.50%、0.85%,转速最大相对误差为0.70%。试验数据还显示,该传感器的测量灵敏度为1.26mV/N·m,精度达到1.0%,对于一般工程应用是可行的。
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关键词: 传感器, 纳米晶软磁合金, 多功能, 转矩, 转速, 转角