Design and Experimental Research of Intelligent Wrench Based on STM32 to Realize Torque-Rotation Angle Method
In order to put the torque wrench into the scene with high demand for bolt preload,a high-precision torque wrench that can measure the angle is designed based on STM32.The wrench adopts the torque-rotation angle method,uses the strain gauge sensor to complete the torque value setting,and collects the angle data through the nine-axis sensor MPU9250.A measurement scheme based on the joint algorithm of Kalman filtering and complementary filtering is designed,and data fusion and angle calculation are realized through this scheme.Finally,the feasibility of the measurement scheme is tested and the measurement accuracy is compared with similar torque wrenches with different schemes on the market.The experimental results show that the measurement scheme can be used for an-gle measurement,which reduces the zero drift and random walk,reduces the data error and improves the measurement accuracy during angle measurement.
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