扭矩扳手高精度传感器设计和误差补偿方法

Design and Error Compensation Method of High Precision Torque Wrench Sensor

随着智能装配产业的发展,制造业对扭矩扳手的高精度控制和数据传输等功能的需求成为一种必然。针对扳手高精度传感器的设计和误差补偿方法:首先,介绍扳手传感器的直径验算,通过有限元分析确定最大受力点,完成结构优化,避免集中应力点;其次,介绍扳手的硬件电路各模块,主要包括调理模块、角度检测模块及微控制器等;再次,从硬件和工艺的角度介绍误差的产生和减少误差的方法,主要包括零飘、温漂和机械滞后;最后,通过对扭矩扳手的标定和10万次加载实验,验证了传感器材料的可靠性和精度的稳定性,保证了扳手1级精度的设计要求。

With the development of intelligent assembly industry, the functions of high-precision control and data transmission of torque wrench in manufacturing industry have gradually become necessary. This paper introduces the design and error compensation method of wrench high-precision sensor. Firstly, the diameter checking calculation of wrench sensor is introduced,and the maximum stress point is determined through finite element analysis to complete structural optimization and avoid concentrated stress points;Secondly, the hardware circuit modules of the wrench are introduced, mainly including conditioning module, angle detection module, microcontroller and so on;Furthermore, the error generation and error reduction methods are introduced from the perspective of hardware and technology, mainly including zero drift, temperature drift and mechanical lag.Finally, through the calibration of the torque wrench and 100 000 loading experiments, the reliability of the sensor material and the stability of precision are verified, and the design requirements of grade 1 precision of the wrench are guaranteed.