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Concentration changing and sending adjusting device

A technology of concentration transmission and adjustment device, which is applied in the direction of control/regulation system, viscosity control, non-electric variable control, etc., which can solve the problems of servo amplifier increasing control delay lag, system fluctuation, and increasing valve cost, etc., to reduce installation The connection and maintenance work load, the action speed is fast, and the effect of improving reliability

Inactive Publication Date: 2004-11-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The actual usage shows that the servo amplifier increases the delay of the control, which is easy to cause system fluctuations; it also increases the cost of the valve

Method used

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  • Concentration changing and sending adjusting device
  • Concentration changing and sending adjusting device
  • Concentration changing and sending adjusting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] image 3 In the figure, the real-time measurement value of the movable knife concentration transmitter P is sent to the microcomputer fuzzy regulator, and the output of the fuzzy regulator is controlled by the valve motor to control the opening of the regulating valve FW.

[0029] The method of constructing the fuzzy adjuster will be specifically described below.

[0030] 1. Language variables of the controller

[0031]The input variables (often taken deviation and deviation rate of change) and output variables (often taken control variables) of the fuzzy controller are given in natural language instead of numerical values. It belongs to language variables. Usually the word set of the language variable is a set consisting of the following 7 fuzzy subsets:

[0032] {Big negative, medium negative, small negative, negative zero, positive zero, positive small, positive middle, positive big}

[0033] The symbol is:

[0034] {NB, NM, NS, NO, PO, PS, PM, PB} (1)

[0035] 2. Discr...

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PUM

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Abstract

The invention is a temperature transducing and adjusting device, specially relating to a device of measuring and controlling fluid concentration, including power concentration transducer, fuzzy adjuster, solid-state relay, valve machine and adjusting valve, all electrically connected in turn, where the power concentration transducer includes sensing component, lever mechanism, photoelectric sensor and force generator, the fuzzy adjuster includes matrix unit and programmable pulse-width modulation (PWM) unit, and the output signal of the fuzzy adjuster is connected to the input end of the solid-state relay. It implements direct control of valve machine; the solid-state relay has no contractor, light control current and high acting speed; it omits adjuster and valve servo amplifier, reduces cost, and enhances reliability, and the control system has small overshoot and responds quickly.

Description

Technical field [0001] The invention belongs to an automatic instrument and an automatic control device, and particularly relates to an automatic device for measuring and controlling fluid concentration. Background technique [0002] Homogeneous substances with the same composition or the same physical and chemical properties are called "phases". The phase can be composed of a single substance or multiple substances. Two-phase fluid refers to a situation where there are two phases or dynamic interactions between two components in the fluid. Compared with single-phase fluids, two-phase fluids are much more complicated. On the one hand, since each phase in the two-phase flow has its own set of flow parameters, the variables describing the movement have almost doubled. On the other hand, the volume concentration of each phase, the size of the dispersed phase particles, and the physical properties of each phase (density, Viscosity, etc.) and the relative flow rate between the phases ...

Claims

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Application Information

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IPC IPC(8): G01N9/34G05D24/00
Inventor 李昌禧王利恒
Owner HUAZHONG UNIV OF SCI & TECH
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