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Novel gas flow and concentration measuring instrument

A technology for gas flow and concentration measurement, which is applied in the direction of liquid/fluid solid measurement, measurement flow/mass flow, and measurement devices, etc. It can solve the problems of complex detection process, inability to guarantee the consistency of gas flow and concentration, and low detection efficiency. Achieve the effect of good selectivity, simple and convenient detection process, and strong anti-interference

Inactive Publication Date: 2018-09-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a novel gas flow and concentration measuring instrument for the problems of low detection efficiency, complicated detection process, and inability to ensure the consistency of gas flow and concentration in the existing independent detection of gas flow and concentration.

Method used

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  • Novel gas flow and concentration measuring instrument
  • Novel gas flow and concentration measuring instrument
  • Novel gas flow and concentration measuring instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A new type of gas flow and concentration measuring instrument, including a laser 1, a laser collimator lens 2, a beam splitter 3, a first reflective prism 4, a second reflective prism 5, a third reflective prism 6, a first focusing lens 7, and a gas pipeline 8. The second focusing lens 13 and photon detector 14; after the main line of the optical path emitted by the laser 1 is transmitted to the beam splitter 3 through the laser collimating lens 2, part of it is transmitted to the third reflective prism 6, and the other part is transmitted to the first reflective prism in turn. Reflecting prism 4 and second reflecting prism 5, the optical paths from third reflecting prism 6 and second reflecting prism 5 are parallel to each other, enter gas pipeline 8 after being refracted by first focusing lens 7, and form interference in gas pipeline 8 In the fringe area 11 , the scattered light formed by the gas molecules 10 vertically passing through the interference fringe area 11 i...

Embodiment 2

[0032] Based on Embodiment 1, the vertical distances from the second reflective prism 5 and the third reflective prism 6 to the main line of the optical path are equal, that is, the optical path length from the first reflective prism 4 to the second reflective prism 5 is equal to the beam splitter 3 to the third reflective prism 6 The optical path length, this design can make the optical path length of the two parts of the light beam from the beam splitter 3 to the first focusing lens 7 the same, so that the center of the interference fringe area 11 is located on the main line of the optical path, improving the visibility of the interference fringes and facilitating photon detection Receiver 14 receives.

Embodiment 3

[0034] Based on Embodiment 1, the gas pipeline 8 is provided with a first light-transmitting window 9 for light path entry and a second light-transmission window 12 for light path exit.

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Abstract

The invention discloses a novel gas flow and concentration measuring instrument. The novel gas flow and concentration measuring instrument comprises a laser device, a laser collimating lens, a spectroscope, a first reflecting prism, a second reflecting prism, a third reflecting prism, a first focusing lens, a gas pipe, a second focusing lens and a photon detector. Main lines of light paths emittedby the laser device are transferred to the spectroscope through the laser collimating lens, then a part of the main lines of the light paths is transferred to the third reflecting prism, the other part of the main lines of the light paths is sequentially transferred to the first reflecting prism and the second reflecting prism, light paths emitted by the third reflecting prism are mutually parallel to light paths emitted by the second reflecting prism, the light paths are replicated through the first focusing lens to form an interference fringe area in the gas pipe, gas molecules perpendicularly penetrate through scattered light formed through the interference fringe area, are focused through the second focusing lens, and are detected through the photon detector. According to the novel gas flow and concentration measuring instrument, the gas flow and the concentration can be simultaneously measured, detection efficiency is remarkably improved, the consistency of the gas flow and concentration detection is guaranteed, the detection process is simple and convenient, and the cost can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of optical testing, and in particular relates to a novel gas flow and concentration measuring instrument. Background technique [0002] Gas flow rate is an important parameter in industrial detection, and it has important practical significance to measure the flow rate and concentration of industrial gas fluid media such as natural gas, steam, oil gas and coal gas. Gas flow measuring instruments and concentration measuring instruments are widely used in various industries such as chemical industry, oil and gas transportation, and civil water and gas transportation. [0003] Commonly used gas flowmeters include ultrasonic flowmeters, differential pressure flowmeters, turbine flowmeters, rotameters, and thermal flowmeters. Among them, the differential pressure flowmeter is the most widely used gas metering instrument in China, but it has disadvantages such as poor repeatability, low accuracy level, relatively...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/66G01N21/31
CPCG01F1/661G01N21/31
Inventor 廖进昆张大印关元生蔡淇智王俊
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA