基于PID调节的浴池恒温恒压供水系统

In this paper, it mainly studies how to keep the temperature and pressure of bathhouse stable. Compared with the former system, it adds new devices to bathhouse. This system involves S7-200 PLC, pressure sensor, temperature sensor, Siemens touch-screen, pressure regulator and so on. when it works, PLC determines electrically operated valves' open degree by pressure sensor's and temperature sensor's feedback. the PID control is introduced to control temperature. the pressure regulator is also used to keep the pressure more stable, user could change temperature's setpoint through touch-screen, it also includes indicator lights, alarming equipment and so on. it ensures bathhouse's temperature and pressure stable in certain degree.