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Optical cavity for testing natural gas absorption spectrum

A technology of absorption spectrum and optical cavity, which is applied to the field of optical cavity for natural gas absorption spectrum test and optical cavity, and achieves the effect of simple structure, easy material and convenient disassembly and assembly.

Inactive Publication Date: 2015-04-01
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of testing the spectral characteristics of natural gas at different temperatures, and then provide an optical cavity for natural gas absorption spectrum testing

Method used

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  • Optical cavity for testing natural gas absorption spectrum
  • Optical cavity for testing natural gas absorption spectrum

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specific Embodiment approach 1

[0016] DETAILED DESCRIPTION One: This embodiment will be described with reference to the figures. The optical cavity for natural gas absorption spectrum testing of this embodiment includes an optical cavity. The optical cavity includes a measuring part, a gas filling part and a temperature adjusting part. The measuring part mainly includes Gas pool 1, insulation layer 2 and base 3; the charging part mainly includes an air inlet pipe 4, an exhaust pipe 5, an air inlet valve 6, a first exhaust valve 7, a second exhaust valve 8, a vacuum pump 9 and a pressure gauge 10; The temperature adjustment part mainly includes a heat exchange tube 11, a temperature sensor 12, a temperature controller 13, a heater 14, a water tank 15, a refrigerator 16 and an alcohol tank 17. A layer of heat exchange tube 11 is wound around the gas pool 1. The heat exchange tubes 11 are respectively connected to the water tank 15 and the alcohol tank 17, the gas pool 1 is covered with an insulation layer 2...

specific Embodiment approach 2

[0018] Embodiment 2: The embodiment is described with reference to the drawings. In this embodiment, the gas pool 1 is cylindrical, and the heat exchange tube 11 is a copper tube with a diameter of 2 mm, which is tightly wound on the side of the gas pool 1. The temperature adjustment media above 0℃ and below 0℃ are water and alcohol respectively. With this arrangement, the natural gas in the optical front can effectively exchange heat with the liquid in the temperature regulating tube, and the accuracy of the measurement can be achieved. The freezing point of alcohol is -117°C, and the boiling point of water is 100°C, which can greatly increase the temperature adjustment range, so that the gas in the optical cavity can be heated or cooled to achieve measurement at different temperatures.

specific Embodiment approach 3

[0019] Specific embodiment three: This embodiment is described with reference to the drawings. In this embodiment, the thermal insulation material is a non-combustible thermal insulation high-strength glass wool tube made of centrifugal glass wool material. The thermal insulation material is a non-combustible thermal insulation high-strength glass wool tube made of centrifugal glass wool material, which has many advantages such as flame retardant, non-toxic, corrosion resistance, small bulk density, low thermal conductivity, and strong chemical stability. It is currently recognized The most superior heat insulation and heat preservation material.

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Abstract

The invention relates to an optical cavity for testing a natural gas absorption spectrum. The optical cavity is characterized in that the circumference of a gas pool is wound with a layer of heat exchange tube; the heat exchange tube is connected with a water tank and an alcohol tank, respectively; the exterior of the gas pool is sleeved by a heat preservation layer; a base is arranged at the bottom of the optical cavity; an air inlet pipe, an exhausting pipe and a pressure meter are connected to the gas pool; an air inlet valve is mounted on the air inlet pipe; the tail end of the exhausting pipe is divided into two paths, a first exhausting valve and a vacuum pump are mounted on the first path, and a second exhausting valve is mounted on the second path; a temperature sensor is mounted in the gas pool and is connected with a temperature control instrument, and a heater or a refrigerator is connected to the rear part of the temperature control instrument. The side surface of the optical cavity is made of metal materials, the front and rear surfaces of the optical cavity are made of a quartz glass material, the side surface of the gas pool is tightly wound with the cycle of heat exchange tube, the different temperatures of natural gas can be regulated by virtue of heat exchange between the natural gas in the optical cavity and liquid in a temperature regulation tube, and therefore, the spectral characters of the natural gas at the different temperatures are measured. The optical cavity has the advantages that the measurement is accurate, the structure is simple, the detachment is convenient, materials are easily available, and the like.

Description

Technical field [0001] The invention relates to an optical cavity, in particular to an optical cavity for natural gas absorption spectrum testing, and belongs to the technical field of optical testing. Background technique [0002] In recent years, the spectral characteristics of natural gas have played a vital role in the laser detection process of natural gas pipeline leaks. However, the test of natural gas spectral characteristics is greatly affected by temperature. Most spectrometers have no temperature adjustment and can only be measured at room temperature. The spectral characteristics of natural gas, so it is urgent to invent an optical cavity to measure the spectral characteristics of natural gas at different temperatures. [0003] At present, there are many researches on the heating of contrast cuvettes or optical chambers, such as the "heat-conducting cuvette" with the authorization announcement number CN 202869958 U, the "experiment with constant temperature function is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01
Inventor 吴国忠李茜李栋齐晗兵周英明王秋实
Owner NORTHEAST GASOLINEEUM UNIV
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