一种便携式角速度传感器

角速度是旋转系统或传动装置进行状态监测的重要参数。设计了一种新结构、无旋转部件的便携式瞬时角速度传感器。该传感器的工作原理是永磁磁钢建立恒定磁通,被测旋转装置的转动部件切割该恒定磁场后形成涡流,涡流产生的磁场与传感器的霍尔元件相互作用产生霍尔电势,该霍尔电势的幅值与被测旋转装置的角速度成正比。根据磁路的基本定律推导出传感器的输出特性,并对输出特性进行了实际的测定,结果表明:传感器的灵敏度为16.8mV·s/rad,非线性误差为1.24%。

A Portable Angular Rate Sensor

Angular rate is an important parameter for the state monitoring of rotating system or transmission. A portable instantaneous angular rate sensor is designed, which with a new structure and has no rotating parts. The working principle is a constant flux generated by the permanent magnetic steel, then the rotating part of the measured rotating device cuts the constant flux and forms an eddy current, the magnetic field generated by the eddy current interacts with the Hall element of the sensor, and then the Hall potential is generated, the amplitude of the Hall potential is proportional to the angular rate of the measured rotating device. According to the basic law of magnetic circuit, the output characteristics of sensor are deduced, and the output characteristics of sensor is carried out by actual measurement, the results show that the sensitivity of sensor is about 16.8mV·s/rad, the nonlinear error is about 1.24%.