Thermo-Mechanical Coupled Digital Simulation of Torque Sensor Based on Parallel Systems

Abstract

At present, the calibration of most torque sensors is carried out in an ideal laboratory environment. But the temperature around the torque sensor can vary widely in practical applications. The thermal radiation from ambient temperature usually causes the elastic element of the sensor to deviate from Hooke's law and resulting in errors. Based on this problem, we establish the digital simulation and an artificial system of a certain type of strain torque sensor by thermo-mechanical coupled digital simulation method, and we calculate the time-temperature distribution models and the time-elastic modulus distribution model of sensors under different working conditions by finite element thermal analysis and transient force analysis method. Finally, we summarize some change rule of the torque sensor parameters like elastic modulus or shear stress with temperature. So as to obtain the influence mechanism of temperature on the torque sensor, which provides a basis for the improvement of calibration method.