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Small calibration system for forward scattering visiometer

A forward scattering and visibility meter technology, applied in the field of detection, can solve the problems of difficulty in ensuring uniformity, difficulty in universal application, and high site requirements, and achieve the effects of not being easy to absorb, reducing costs, and avoiding deposition

Active Publication Date: 2018-06-19
ZHEJIANG MEASUREMENT SCI RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to ensure the uniformity of the internal environment of the long cabin, and it has high requirements on the site and a large investment, so it is difficult to be widely used

Method used

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  • Small calibration system for forward scattering visiometer
  • Small calibration system for forward scattering visiometer
  • Small calibration system for forward scattering visiometer

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Experimental program
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Embodiment 1

[0018] Such as Figure 1-3 As shown, a small forward scatter visibility meter calibration system includes: simulation cabin 1, particle generator 2, stirring fan 3, visibility measurement reference module 4 and computer 5. Simulation cabin 1 is a rectangular airtight cavity structure. The minimum size of the simulation cabin 1 is 2m in length, 1m in width, and 1m in height. It has an air purification function and is used to adjust the visibility in the closed cavity. The model of particle generator 2 is TSI3475, which is located outside the simulation cabin 1 and communicates with the closed cavity of the simulation cabin 1 through a tube, and is used to inject monodisperse solid aerosol particles into the closed cavity of the simulation cabin 1. The diameter of monodisperse solid aerosol particles is 0.3um-8um. Monodisperse solid aerosol particles are used as the environment simulation medium for visibility. There are four stirring fans 3, which are distributed in four cor...

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Abstract

The invention provides a small calibration system for a forward scattering visiometer and relates to the technical field of detection. The system comprises a sealed simulation cabin, a particulate matter generator, stirring fans, a visibility measurement reference module and a computer, wherein the visibility measurement reference module enables a visibility measurement baseline in a sealed cavityof the sealed simulation cabin to be shortened to 0.5 m or shorter on the basis of the cavity enhancement principle. The technical problems that a baseline of a calibration simulation cabin for forward scattering visibility is too long and uniformity is difficult to guarantee in the prior art are solved. The system has the beneficial effects as follows: particulate matter has consistent grain size and is not prone to adsorption and agglomeration, and calibration and detection experiments achieve higher repeatability. The visibility measurement reference module based on the cavity enhancementprinciple can shorten the measurement baseline to be within 0.5 m, so that size of the calibration simulation cabin of the visiometer is greatly reduced, and cost is reduced; a mirror plane of each cavity mirror is protected by a special shielding gas hood, and gas is prevented from being mixed in a measurement area and influencing the visibility.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a calibration system based on a cavity-enhanced visibility measurement standard module. Background technique [0002] Visibility is one of the elements of meteorological observation. Visibility will have a great impact on ferries, highways, and aviation fields. There are two main types of instruments for measuring visibility: transmission-type visibility meters and scattering-type visibility meters. The transmissive visibility meter requires a baseline of tens or even hundreds of meters, which has high requirements on space and cost, and is not widely used. The diffuse visibility meter occupies a small space, is easy to use, and has a low price. It is widely used in meteorology, transportation and other fields. The observation accuracy and stability of forward scatter visibility meters from different manufacturers are different. At present, there are no verification procedu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/39G01W1/18
CPCG01N21/39G01N2021/391G01W1/18
Inventor 张建锋潘孙强陈哲敏胡朋兵陈宁郭斌
Owner ZHEJIANG MEASUREMENT SCI RES INST
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