Research on Torque Calibration and Measurement Technology in Water

In this paper, a standard device is designed for torque loading calibration and testing of torque sensors in water environments. The calibrated torque sensor adopts fiber Bragg grating full bridge optical path to realize the automatic compensation of temperature and bending moment. It is suitable for the measurement of torque parameters in water environment. In this paper, the measurement accuracy and underwater performance of torque standard device are tested by loading experiment in water environment. Experiments show that the maximum nonlinear error, repeatability and underwater working stability of the underwater torque sensor are good, which indicates that the torque sensor not only has good measurement accuracy, but also can work well in the underwater and other liquid environment. The research work in this paper provides an important technical means for torque measurement in liquid environment such as water.