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In order to solve the problems of large sensor volume, high development cost, low measurement accuracy and the inability to use wired measurement in the process of rotation of the mid-axis of the current torque measurement system, a novel torque measurement system based on strain detection principle and wireless transmission technology is designed. The system uses XKT-412 wireless transmission chip and PIC12F1822 single-chip microcomputer to realize the design of hardware and software, including hardware circuit design, signal acquisition, signal processing and related data processing algorithms, and the system is small in size and low in cost. The experimental results show that there is an obvious linear relationship between the output frequency and the applied moment, and the error between the actual output frequency and the theoretical output frequency is less than 0.5%. The output features of the measurement system meet the design requirements, which has a good promotion and application value.