本文介绍一种小型化低成本的三容水箱实验设备,可作PLC、自动化教学中PID过程控制的教学、实验之用。阐述各个环节如何实现以及硬件组建、调试的过程。 This article describes a miniaturization of low-cost three-tank experiment equipment for PLC, PID teaching automation teaching process control, experimental purposes. Describe how to achieve each link as well as the process of hardware formation and debugging.