变频水泵的意思(国外英文资料).doc

变频水泵的意思(国外英文资料) A control system consists of a controller, a sensor, a transmitter, an actuator, and an input and output interface. The output of the controller goes through the output interface, actuator, and on the controlled system. The control system is controlled by a sensor, a transmitter, and sent to the controller via an input interface. Different control systems have different sensors, transmitters, and actuators. Stress control systems, for example, use pressure sensors. The sensor of the electric heating control system is the temperature sensor. At present, the PID control and its controller or intelligent PID controller (instrument) has a lot of products have been widely used in engineering practice, there are all kinds of PID controller products, companies have developed intelligent controller with PID parameters self-tuning functions (intelligent regulator), including intelligent PID controller parameters can be automatically adjusted by adjusting or self correction, adaptive algorithm to realize. Have used PID control to achieve pressure, temperature, flow, liquid level controller, can realize the PID control function of the programmable controller (PLC), and can realize the PID control system of PC and so on. Programmable controller (PLC) is the use of the closed-loop control module to achieve PID control, while PLC can be directly connected to ControlNet, such as Rockwell PLC -5. There is also a controller that implements PID control, such as the Rockwells Logix product line, which can be directly connected to ControlNet, using the network to implement its remote control capabilities. ) And a pressure transmitter and several auxiliary components. The functions are as follows: the pressure transmitter installed on the water supply line converts the network pressure to a 1-5 volt electrical signal; Variable frequency governor is used to adjust the speed of the pump to adjust the flow. PLC for logical switching. In addition, the system is equipped wit