介绍了利用固态继电器组成的电机控制、保护、运行状态显示装置的电路组成和工作原理。
This paper exemplifies the circuit construction, the function and working principle of the device of control, protect and working state display of electric maching using solid state relay.
该装置由水滴速度测试系统、滴速控制系统、显示装置、单片机系统、键盘和报警等系统组成。光电传感器用来测量液体滴速，利用步进电动机的转速来控制点滴速度，显示装置利用液晶显示器。
The apparatus constitutes the system of testing the liquid drop speed, the system of controlling the liquid dropping speed, LCD display system, MCS-51 system, the key board and alarming system.
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