Control method for intelligent valve positioner

A control method and technology of intelligent valve, applied in the direction of using feedback control, etc., can solve the problems of increasing the work difficulty of on-site operators, prone to human error, poor adaptability, etc., to achieve simple and fast debugging, convenient debugging operation, and fast positioning speed. Effect

Active Publication Date: 2012-06-06
衡阳北方光电信息技术有限公司
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AI Technical Summary

Problems solved by technology

[0003] The adjustment of various control parameters of the existing intelligent valve positioner must be implemented at the installation site, and the debugging is cumbersome, which increases the work difficulty of the on-site operators and is also prone to human errors
Moreover, the existing intelligent valve positioners have poor adaptability. For example, large-stroke pneumatic valves and small-stroke pneumatic valves, angular strokes and linear strokes, or actuators with different flow characteristics all require different types of intelligent valve positioners.

Method used

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  • Control method for intelligent valve positioner
  • Control method for intelligent valve positioner
  • Control method for intelligent valve positioner

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Embodiment Construction

[0036] like figure 1 As shown, the controller 901 outputs the setting signal, enters the power supply and signal conditioning module 903 through the two wires 902, provides the working power of the whole machine, extracts the control signal and sends it to the MSP430 microcontroller 906, and the current valve position of the actuator 909 is sent through the valve position sensor 908. to the MSP430 single-chip microcomputer; the adaptive PID control program 904 compares the setting signal with the feedback signal, performs adaptive PID processing on the deviation, and sends the PWM signal at the next moment, and the PWM signal drives the I / P conversion unit 907, which is driven by the pneumatic power amplifier. The actuator is adjusted.

[0037] (1) Main program

[0038] The microcontroller MSP430 works in a low power consumption mode, and its low power consumption is mainly realized by working in an idle mode or a power-down mode. Except for the ACLK activity, the CPU and va...

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Abstract

The invention relates to a control method for an intelligent valve positioner, which has simple and rapid debugging. The technical scheme is that a singlechip receives a set signal sent by a controller and a feedback signal transmitted by a valve position sensor; the set signal is compared with the feedback signal; a bias is subjected to adaptive PID control; a corresponding PWM signal is output to drive an I / P converting unit; and an executing mechanism is driven by a pneumatic power amplifier.

Description

technical field [0001] The invention relates to a control method of an intelligent valve positioner. Background technique [0002] The intelligent valve positioner is a new product popularized and used in the field of automatic control of flow, temperature and pressure. In the field of industrial control, the use of intelligent valve positioner and computer network technology can flexibly form a decentralized or clustered automatic control system, which can improve the performance of traditional industries. The level of automation and production capacity, thereby improving the economic effect of the enterprise. [0003] The adjustment of various control parameters of the existing intelligent valve positioner must be implemented at the installation site, and the debugging is cumbersome, which increases the work difficulty of the field operators, and is also prone to human errors. Moreover, the existing intelligent valve positioners have poor adaptability. For example, large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D3/12
Inventor 周欢喜王斌慧汪时云
Owner 衡阳北方光电信息技术有限公司
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