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Instrument for monitoring small particulate matters in air

A technology for tiny particles and monitoring instruments, applied in the field of optical instruments, can solve the problems of low signal-to-noise ratio, mutual influence, and easy overlap between particles and particles, so as to improve the signal-to-noise ratio and avoid mutual influence.

Active Publication Date: 2012-10-03
JIANGSU SUJING GROUP +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Due to the large concentration of inhalable particulate matter in the atmosphere, when the light scattering method is used for monitoring, particulate matter and particulate matter tend to overlap and interact with each other, resulting in a low signal-to-noise ratio of the collected signal

Method used

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  • Instrument for monitoring small particulate matters in air

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Embodiment Construction

[0021] The structure of the present invention will be further described below in conjunction with the accompanying drawings.

[0022] see figure 1 As shown, the air fine particle monitoring instrument includes a main air circuit 13, a sensor 1, a signal acquisition board 2 arranged in the sensor 1, a filter paper filter 3, a sampling pump 5, a discharge pipeline 14, a filter drier, and a main control circuit Plate 8, first flow control valve 6, second flow control valve 11, protective gas circuit 15, temperature and humidity sensor 12, the main gas circuit 13 is used to input the air to be measured, the sensor 1 is connected to the main gas circuit 13, and the sensor The signal acquisition board 2 in 1 is electrically connected to the main control circuit board 8, the inlet of the filter paper filter 3 is connected to the sensor 1, the filter paper filter 3 has replaceable filter paper 4, and the outlet of the filter paper filter 3 is connected to the sampling pump The i...

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Abstract

The invention discloses an instrument for monitoring small particulate matters in air. The instrument is characterized in that small particle features of the small particulate matters in the air is monitored, and obtained electrical signals of the small particle features of the small particulate matters in the air to be monitored are processed and analyzed through a master control circuit, so as to judge the particle sizes of the small particulate matters in the air and further analyze the mass concentration and the particle number concentration of the small particulate matters. When the instrument is used for monitoring the air, the air to be monitored is diluted through introducing clean dry gas into a main gas path, so that mutual influence of the particulate matters, which is caused by overlap, is avoided, and the signal to noise ratios of the collected signals are increased; and besides, clean dry gas is introduced into a sensor, so that a circle of protection is formed on the periphery of the air to be monitored, and parts such as a light source, and the like in the sensor cannot be polluted by the air to be monitored.

Description

technical field [0001] The invention relates to an optical instrument, in particular to an air micro particle monitoring instrument. Background technique [0002] Tiny particulate matter pollution in the air is the main cause of haze weather, and especially PM2.5 (smaller than or equal to 2.5 micron particles) inhalable particulate matter will affect human health, mainly causing damage to the respiratory system and cardiovascular system. And the smaller the particle size, the greater the harm to the human body. The monitoring of fine particulate matter in the air is of great significance to the governance of the environment and the protection of human health. [0003] At present, there are mainly methods for measuring airborne fine particles in China: (1) filter membrane weighing method, this method has simple principle, high dust resistance rate and reliable measurement results, but manual weighing is required, the operation is cumbersome and time-consuming, and automatic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/00G01N15/02G01N15/06G01N1/38
Inventor 刘嘉金惠琴陈建
Owner JIANGSU SUJING GROUP
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