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Liquid level measuring method and device based on isosceles right triangular prism

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

Inactive Publication Date: 2011-06-22
HARBIN ENG UNIV
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  • Abstract
  • Description
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  • Application Information

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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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  • Liquid level measuring method and device based on isosceles right triangular prism
  • Liquid level measuring method and device based on isosceles right triangular prism
  • Liquid level measuring method and device based on isosceles right triangular prism

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Embodiment Construction

[0016] combine figure 1 , the liquid level measuring device based on the isosceles right-angled prism includes a line light source 7 and a transparent protective cover 8, an isosceles right-angled prism 3, an airtight box 9, a linear array CCD2, a circuit unit 1 (including: a linear array CCD2 drive circuit, a data acquisition and processing circuit and data transmission circuit), the linear array CCD2 is embedded in a slot with a width and length slightly larger than the width and length of the CCD2 chip of the airtight box 9, and the inner and outer sides of the airtight box 9 are opposite to the slots of the CCD2 The slit is sealed, while ensuring that the protective glass of CCD2 protrudes slightly from this side of the airtight box 9, and the line light source 7 and the linear array CCD2 are respectively placed on the side where the two right-angled sides of the cross-section of the prism 3 are located and are located on the same side. In the vertical plane, it is require...

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Abstract

The invention discloses liquid level measuring method and device based on an isosceles right triangular prism. Liquid level measurement is realized by utilizing the principles of refraction, reflection, total reflection, and the like of a light beam in an isosceles right triangular prism and extracting the liquid level characteristic information in linear array CCD image data. The measuring device mainly comprises a line light source, the isosceles right triangular prism, a linear array CCD, a control circuit, and the like, wherein the isosceles right triangular prism is placed into a container; the parallel light emitted by the line light source is projected into the triangular prism perpendicular to the side surface that a right-angle side of a cross section of the triangular prism is located, and is intersected with the side surface that the inclined side is located. The method is an optical liquid level measuring method without an optical imaging lens and has the advantages of less influence on precision by change of liquid concentration, relatively simple structure, operation in corrosive hostile industrial environments, and the like.

Description

technical field [0001] The invention relates to a liquid level measuring method. The invention also relates to a liquid level measuring 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 the ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/292
Inventor 温强张晓敏刘羽高伟强孙秋华王伟强赵言诚谭爽杨依珍王云锋
Owner HARBIN ENG UNIV
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