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For the rolling mill torque telemetry system, the battery power supply has a short duration, and the current supply by the collector ring can achieve long-term power supply, but it is difficult to achieve stable power supply for a long time due to limitations such as speed and wear. This paper designs a high-frequency induction power supply system to realize long-term stable power supply of sensors and signal transmitting modules on the measured axis. The WIFI signal transmission technology is used to realize the fast, efficient and stable wireless transmission of torque signals. The embedded programming of STM32F103 chip based on Cortex-M3 kernel architecture realizes the AD conversion, signal processing, WIFI transmitting and receiving control of torque signal. The system has been applied to the monitoring of main drive torque of many continuous rolling mills and achieved good results, which can replace expensive imported products.

Development and Application of On-Line Torque Telemetry System for Rolling Mill based on WIFI Signal Transmission and High Frequency Induction Power Supply