Intelligent pressure regulator

一种用于控制过程流体的压力的压力调节器，包括：限定流体入口、流体出口和介于入口与出口之间的流体流动通道的主体；通过杆可在流动通道中移动的节流件；与节流件相联、用于可选择地移动该节流件以控制流过流动通道的流体流率的致动器；与致动器相联、用以将节流件偏置到预定参考位置上的弹簧负载；响应传感器而用于将过程流体施加到致动器上、用以将节流件定位的反馈线路，其中，致动器和反馈线路被构成为，将节流件定位成：根据位于调节器下游的过程流体的预定压力来阻塞流过流动通道的流体流率；以及向致动器施加力、用以响应至少一个过程变量来进一步定位节流件的电子控制器。该改进型调节器具有通信和诊断能力，以便进行远距离操作，并能交换数据以提高维修保养性能。 An intelligent pressure regulator for maintaining a fluid in a process at a predetermined pressure includes an electronic controller which enhances regulator performance and provides self-diagnostics and communications capabilities. The electronic controller includes a pressure sensor which provides a signal indicating the pressure of the fluid being controlled, an adjusting pressure for adjusting the position of a throttling element; and a PID controller which receives the signal indicating the pressure of the fluid being controlled and applies the adjusting pressure to the actuator in response to the signal.