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Low-cost high-precision haze measuring instrument

A high-precision, measuring instrument technology, applied in the direction of measuring devices, scientific instruments, suspension and porous material analysis, etc., can solve the problems of poor measurement accuracy and high equipment cost, achieve low equipment cost, improve measurement accuracy, and be easy to carry Effect

Active Publication Date: 2014-08-20
INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0008] The purpose of the present invention is to solve the defects of high equipment cost and poor measurement accuracy in the prior art, and provide a low-cost and high-precision haze measuring instrument to solve the above problems

Method used

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  • Low-cost high-precision haze measuring instrument
  • Low-cost high-precision haze measuring instrument
  • Low-cost high-precision haze measuring instrument

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Embodiment Construction

[0034] In order to have a further understanding and understanding of the structural features of the present invention and the achieved effects, the preferred embodiments and accompanying drawings are used for a detailed description, as follows:

[0035] When using the light absorption attenuation method for light scattering measurement, the light absorption satisfies the Beer-Lambert formula, that is

[0036]

[0037] Among them: Io is the light intensity value after pollution absorption, I is the light intensity value before absorption, is a constant, L is the optical path value, is the air pollution concentration value we need.

[0038] In addition to the light absorption loss caused by the pollution particles in the air in general air, the water vapor in the air will also cause certain losses to the laser. Therefore, it is necessary to measure the gas sample after filtering out the air pollution particles, and then calculate the intermediate light intensity differenc...

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Abstract

The invention relates to a low-cost high-precision haze measuring instrument which overcomes the defects of high equipment cost and poor measurement precision in the prior art. The haze measuring instrument comprises a filtered gas chamber and a to-be-measured gas chamber. The output end of an optical fiber A faces the central part of a light transmission piece A; the output end of an optical fiber B faces the central part of a light transmission piece C; a diffusion light detection window A is connected with a filtered gas chamber diffusion light detector and a filtered gas chamber transmission light detector; and a diffusion light detection window B is connected with a to-be-measured gas chamber diffusion light detector and a to-be-measured gas chamber transmission light detector. According to the invention, two schemes consisting of luminous intensity attenuation and light scattering are employed to measure atmospheric pollution concentrations, so measurement precision is enhanced.

Description

[0001] technical field [0002] The invention relates to the field of haze measurement, in particular to a low-cost and high-precision haze measuring instrument. [0003] Background technique [0004] According to the definition of the International Organization for Standardization (ISO), "atmospheric pollution usually refers to the entry of certain substances into the atmosphere due to human activities or natural processes, presenting sufficient concentrations for sufficient time, and thus endangering human comfort and health. and welfare or environmental pollution”. Nowadays, with the development of industrialization in China, the environment has deteriorated, and air pollution has become increasingly serious, which has seriously affected the health of Chinese people. Today's pollution detection is generally carried out at fixed monitoring stations, and pollution monitoring cannot be carried out at different locations anytime and anywhere, so that people in the country c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06
Inventor 刘文许立新王智浩姚培军
Owner INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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