Small constant pressure control system based on embedded technology

Abstract

The invention relates to a constant pressure control system, in particular to a small constant pressure control system based on an embedded technology. The small constant pressure control system comprises a controller, a pressure transmitter, a limit switch, a photoelectric encoder, an electromagnetic valve and a driver, wherein the controller comprises a processor, the output end of the limit switch is connected with the controller, the output end of the controller is connected with the driver, the driver controls starting and closing of a stepping motor, the stepping motor drives a transmission mechanism, the transmission mechanism is connected with a metering pump, the metering pump is connected with the pressure transmitter, the stepping motor is connected with the photoelectric encoder, the output end of the photoelectric encoder and the output end of the pressure transmitter are connected with the controller, and the output end of the controller is connected with the electromagnetic valve. According to the technical scheme, the small constant pressure control system based on the embedded technology has relatively high control precision and stability.

Description

technical field [0001] The invention relates to a constant voltage control system, in particular to a small constant voltage control system based on embedded technology. Background technique [0002] Metering pump is a small constant pressure control system, which has important application value in petroleum, chemical industry, coal mine and other fields. The metering pump currently designed has low control precision, poor stability and poor practicability in a constant pressure working environment. Embedded technology can integrate computer control, communication, and network with metering pumps, which can greatly improve the control accuracy of the system. Therefore, the embedded technology is introduced into the precision metering pump, and a metering pump constant pressure control system based on ARM processor and embedded Linux operating system is proposed. [0003] Most of the metering pump constant pressure control methods currently designed have certain problems. T...

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Problems solved by technology

[0003] Most of the metering pump constant pressure control methods currently designed have certain problems. The starter is usually a finished device, the cost of the equipment is high, and the frequency fluctuation is high, which may easily lead to the problem of unstable pressure of the controller; the adaptability of the control system Poor, and there are problems of low control accuracy and parameter setting lag; the parameters of the metering pump system are not fixed, and it is impossible to create an accurate mathematical model. The classic PID control method cannot ensure that the system has the best constant in a complex environment. pressure control performance

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