带压力保护的PID流量控制器

工业生产中的流量控制一般采用通用的PID控制器,这种方式的缺点是在控制流量的同时无法控制压力。为了能在控制流量的同时保证压力在允许的范围内,设计了一款带压力保护的流量控制器。该控制器同时采集流量和压力信号,当压力在允许范围内时,进行正常的流量控制。而当压力超标时,降低流量,从而降低压力,以保护设备。详细阐述了控制器的接口电路,并给出了PID算法和控制策略。

PID Flow Controller with Pressure Protection

Since the general PID controller commonly used for the flow control in industrial production is unable to control the pressurer, PID flow controller with pressure protection is designed to control the flow while maintaining the pressure within the permissible range. The controller acquisits both of the flow and pressure signals, and works for the normal flow control when the pressure is within the allowable range, but reduces the flow to thus remit the pressure and protect the equipment when the pressure becomes excessive. The interface circuit of the controller is elaborated. The PID algorithm and control strategy are presented.