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Calibration method of PM2.5 (particulate matter 2.5) detector

A technology of PM2.5 and calibration method, which is applied in the direction of measuring devices, scientific instruments, suspension and porous material analysis, etc., can solve the problems of large investment, the need to purchase gas sources, and the inability to mass-produce, etc., to achieve small investment and easy operation The effect of simplicity, good consistency and accuracy

Inactive Publication Date: 2016-06-15
TENWAY SHANGHAI INC
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  • Claims
  • Application Information

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Problems solved by technology

However, the existing technology has the following technical shortcomings: (1) the existing calibration means cannot be mass-produced; (2) it is difficult to ensure the accuracy of the concentration of the standard gas source; (3) the gas source needs to be purchased, and the investment is relatively large

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  • Calibration method of PM2.5 (particulate matter 2.5) detector
  • Calibration method of PM2.5 (particulate matter 2.5) detector
  • Calibration method of PM2.5 (particulate matter 2.5) detector

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Embodiment Construction

[0021] The calibration calibration method of PM2.5 detector of the present invention, the method comprises the following steps:

[0022] (1) Put the standard meter of the PM2.5 detector and the PM2.5 detector to be calibrated in the closed container, and make the initial concentration of PM2.5 300-500μg / m 3 Gas, as the PM2.5 particles will fall or attach to the objects as the experiment progresses, the PM2.5 concentration in the closed container space will be reduced, and the PM2.5 concentration will eventually be reduced to tens of μg / m 3 . In the closed container, multiple PM2.5 detectors to be calibrated can be placed, and simultaneous calibration of multiple PM2.5 detectors to be calibrated can be realized, which improves efficiency and saves time. Produce PM2.5-containing gas by lighting cigarettes or sandalwood in a closed container. By lighting cigarettes or sandalwood, the PM2.5 in the container can quickly rise to the concentration we need, and a small fan is instal...

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Abstract

The invention discloses a calibration method of a PM2.5 (particulate matter 2.5) detector, characterized by comprising the following steps: (1), placing a PM2.5 detector calibration meter and the PM2.5 detector to be calibrated, into a closed container, and making a gas having initial PM2.5 concentration of 300-500 Mug / m<3>; (2), reading in real time PM2.5 concentration Ci on the PM2.5 detector calibration meter and duty ratio Di on the PM2.5 detector to be calibrated, calculating a particle count according to the duty ratio Di, polynomially fitting with the particle count Pi and the PM2.5 Ci, wherein i=1, 2...n-1; (3) writing a polynomial fitted above into the PM2.5 detector to be calibrated.The calibration method of the PM2.5 detector is simple to operate and low in investment; a calibration equation is made according to the PM2.5 concentration and the duty ratio and written into each PM2.5 detector to be calibrated, equipment runs according to the calibration equitation so that the concentration shown by the detector to be calibrated has good uniformity and accuracy.

Description

technical field [0001] The invention belongs to the technical field of measuring instrument calibration, and in particular relates to a calibration calibration method for a PM2.5 detector. Background technique [0002] The PM2.5 detector is a detector that detects the quality of fine particulate matter with a particle size of less than 2.5 μm in the atmosphere. Although fine particulate matter is only a small component of the earth's atmospheric composition, it has an important impact on air quality and visibility. The particle size of fine particles is small, and some fine particles are rich in a large amount of toxic and harmful substances, stay in the atmosphere for a long time, and have a long transportation distance, so they have a greater impact on human health and the quality of the atmospheric environment. [0003] Most PM2.5 detectors simulate the number of particulate matter into concentration. The output of the infrared PM2.5 detector is analog: duty cycle. For...

Claims

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Application Information

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IPC IPC(8): G01N15/06
CPCG01N15/06G01N15/075
Inventor 马文兵张辉兰日强
Owner TENWAY SHANGHAI INC
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