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In view of the big influence of environmental factors, low precision, poor stability , inconvenient operating and application in the process of present domestic dynamic torque measurement of rotating machinery.Using inductive power supply technology, wireless communication technology, micro-power consumption processing technology, virtual simulation technology, A type of rotating dynamic torque test system was designed based on WIFI wireless sensor networks (WSNS) combined with virtual instrument. By which ,The real-time accurate monitoring , on-line calibration, storage, analysis, display, forecast and generating report of multi-channel dynamic torque parameters can be accomplished. Simulation and measured results show that the system power consumption is lower than 0.05 W, measurement accuracy can reach 0.4% FS, good dynamic response, easy operation, stable and reliable operation for a long time.