一种基于TMR技术的力矩传感器设计

Design of a Torque Sensor Based on TMR Technology

针对电助力自行车的动态力矩测量,设计一种基于穿隧磁阻(Tunneling Magneto Resistive,TMR)的一维力/力矩的检测系统以及一种无线数能同传系统,用于测量人体在骑行过程中,施加在中轴上的力矩,并实现力矩传感器信号的多级放大以及信号采集软件和硬件的设计。应用控制器局域网络(Controller Area Network,CAN)总线接口与外部上层控制器通信,实时计算和传递电助力自行车骑行过程中的力矩信号。实验结果证明,该传感系统能够完成脚底踩踏力矩信息的实时采集、计算与通信。

Aiming at the dynamic torque measurement of electric powered bicycles,a one-dimensional force/torque detection system based on Tunneling Magneto Resistive(TMR)and a wireless data energy simultaneous interpreting system are designed,which are used to measure the torque exerted on the central axis by the human body during the riding process,realize the multi-level amplification of the torque sensor signal,and design the signal acquisition software and hardware.The Controller Area Network(CAN)bus interface is used to communicate with the external upper controller,and calculate and transmit the torque signal during the riding process of electric powered bicycles in real time.The experimental results demonstrate that the sensing system is capable of real-time collection,calculation,and communication of foot stepping torque information.