摘要
介绍了以压电扭转效应为基础的新型扭矩传感器。该传感器的扭矩测量晶组仅由3片石英晶片与4片半圆分割电极组成，它的主要特征是利用石英晶片的扭转效应，而不是常用的剪切效应。所谓扭转效应是指当压电晶体受到扭矩作用时，在压电晶体的某些表面产生扭转极化电荷的现象。利用积分法理论上得出该传感器量程的理论计算公式，通过静态，该传感器的测量范围为-9-9N·m，而且具有良好的线性，该扭矩传感器的各项静态指标均达到了CIRP－SIEC标准。同时动态标定表明，它的固有频率高达12kHz．
A new type of torque sensor based on the piezoelectric torsional effect introduced. The torque measuring cell of the torque sensor is only made up of three piezoelectric quartz discs and four semicircular electrodes, whose outstanding feature is that the new torque sensor uses the piezoelectric torsional effect, rather than the shear effect. The torsional effect is that when a torque is applied to a piezoelectric crystal, the polarized charge produces on its surfaces. According to the integral method, the theoretical formula of range is obtained. The static calibration shows the range of the new-type torque sensor is - 9 - 9 N·m, and its linearity is very well,which already reach the standard stipulated by the CIRP- CTCC. At the same time, through dynamic calibration the natural frequency of the torque sensor exceeds 12 kHz.
出处
《仪表技术与传感器》
CSCD
北大核心
2006年第5期6-7,10,共3页
Instrument Technique and Sensor
关键词
扭矩传感器
扭转效应
固有频率
标定
torque sensor
torsional effect
natural frequency
calibration
