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Bevel edge type liquid level measurement method and device based on isosceles right triangular prism

A liquid level measurement device, isosceles right angle technology, applied in the direction of measuring device, liquid/fluid solid measurement, lubrication indicating device, etc., can solve the problems such as difficult system error, and achieve the effect of small precision and simple structure

Inactive Publication Date: 2011-11-16
HARBIN ENG UNIV
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Problems solved by technology

The structure of this method is relatively simple, but since the glass tube itself is a lens, there needs to be a certain distance between the linear array CCD and the glass tube, which is prone to produce system errors that are not easy to control

Method used

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  • Bevel edge type liquid level measurement method and device based on isosceles right triangular prism
  • Bevel edge type liquid level measurement method and device based on isosceles right triangular prism
  • Bevel edge type liquid level measurement method and device based on isosceles right triangular prism

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Embodiment Construction

[0015] combine figure 1 The hypotenuse liquid level measuring device based on the isosceles rectangular prism includes a line light source 4 and a transparent protective cover 5, an isosceles rectangular prism 6, an airtight box 7, a linear array CCD9, and a circuit unit 8 (including: a linear array CCD9 drive circuit , data acquisition and processing circuit and data transmission circuit), the linear array CCD9 is embedded in a slot whose width and length are slightly larger than the width and length of the CCD9 chip on a certain side of the airtight box 7 and is slotted on both sides inside and outside the airtight box 7 Seal the gap with the CCD9, while ensuring that the protective glass of the CCD9 protrudes slightly from this side of the airtight box 7, and the line light source 4 and the linear array CCD9 are arranged above the hypotenuse plane of the prism 6 and parallel to the plane. At the same time, it is required that the line light source 4 and the linear array CCD...

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Abstract

The invention provides bevel edge type liquid level measurement method and device based on an isosceles right triangular prism. Liquid level measurement is realized by utilizing principles of refraction, reflection and total reflection of lights in the isosceles right triangular prism and the like and extracting liquid level characteristic information in linear array CCD (Charge Coupled Device) image data. The measurement device mainly comprises a line source, the isosceles right triangular prism, a linear array CCD, a control circuit and the like, wherein the line source and the linear arrayCCD are arranged above a bevel edge plane of the isosceles right triangular prism, are parallel to the bevel edge plane, are also arranged on the same line and are vertical to arrises of the isosceles right triangular prism, and the side surface located by a bevel edge of a cross section of the isosceles right triangular prism is parallel to a liquid level. The method is an optical liquid level measurement method without needing an optical imaging lens, has the advantages of less influence of liquid concentration variation to the accuracy, relatively simple structure and the like and can workunder severe industrial environments with corrosiveness and the like.

Description

technical field [0001] The invention relates to a liquid level measurement method, and the invention also relates to a liquid level measurement device. Background technique [0002] Liquid level is one of the most important and commonly measured parameters in industrial processes. The measurement of liquid level mainly refers to the position measurement technology of vapor-liquid, liquid-liquid, liquid-solid interface, which is widely used in liquid storage equipment such as chemical industry, petroleum and power plant. The existing liquid level measurement methods include pressure liquid level measurement method, floating liquid level measurement method, capacitive liquid level measurement method and ultrasonic liquid level measurement method, etc., but when the liquid concentration, temperature changes or is restricted by the environment, the above measurement The resolution of the method is low, the error is large, or the measurement cannot be carried out. [0003] With...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/292
Inventor 温强刘艳秋高伟强刘羽孙秋华王伟强谭爽张晓敏邵永丰
Owner HARBIN ENG UNIV
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