基于工业摄像技术的轴转速转矩测量系统设计与实验

Design and Experiment of Shaft Speed and Torque Measuring System Based on Industrial Imaging Technology

提出一种轴转速转矩测量方法,通过计算相邻两张图片总位移差与相机采集间隔的比值得到转速值,通过计算轴受转矩时图像两端的形变值得到转矩值。分别搭建转速转矩实验平台对系统进行测试。结果表明：相机曝光时间在1 000~5 000μs之间时,系统测量转速变动过程符合实验台转速变化规律,且转速最大值与曝光时间成负相关,验证了系统的可行性;系统测量值效果与应变片法基本保持一致,系统测量精度高,结构简单,能够适用于轴微小形变位移测量。

Firstly,the paper proposes a shaft speed and torque measuring method,with which we can get speed value by calculating the ratio of two adjacent pictures＇ total displacement difference and camera acquisition interval and get torque value by calculating the deformation value of the image at both ends while the shaft is controlled by the torque. Then,it tests the system with speed and torque experiment platform respectively. The experiment result shows that the process of measuring speed change is in accordance with the rules of test speed when camera exposure time in 1 000 ~ 5 000 μs,and the maximum speed is negatively correlated with exposure time,which can prove the feasibility of the system; the measuring results of the system are basically consistent with the strain gauge method,and the system with high precision and simple structure can be applied to measure the displacement of micro deformation of the shaft.