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介绍一种基于单片机的扭矩测量系统。通过在弹性轴上黏贴电阻式应变片的方式制作出一个扭矩传感器,使用单片机AT89C51对采集的扭矩信号进行处理并通过LED数码管显示出来,从而实现在线测量扭矩的目的。文中详细介绍了模数转换器AD574芯片与单片机构成的模数转换电路,LED数码管的显示接口电路以及使用MAX232芯片实现与PC机连接的串口通信电路。
This paper introduces a kind of torque measurement system based on single chip microcomputer. A resistive strain gauge is attached to the elastic shaft to make a torque sensor. The collected torque signal is processed by the AT89C51 microcontroller and displayed by the LED digital tube, so that the torque can be measured online. In this paper, an analog to digital conversion circuit consisting of an AD574 chip and a singlechip, a display interface circuit of the LED digital tube and a serial communication circuit connecting to a PC using the MAX232 chip are described in detail.