Online particulate matter detection system and method suitable for urban rail transit places

Abstract

The invention discloses an online particulate matter detection system suitable for urban rail transit places. The online particulate matter detection system comprises a dust concentration detection instrument, an air pump, a flow gauge and an external filter, wherein the dust concentration detection instrument is provided with a built-in filter membrane apparatus, the external filter is connectedwith the built-in filter membrane apparatus in parallel, air inlet sides of the external filter and the built-in filter membrane apparatus are communicated with an air inlet pipeline, air outlet sidesof the external filter and the built-in filter membrane apparatus are communicated with an air pumping end opening of the air pump by virtue of an air outlet pipeline, an air outlet end opening of the air pump is connected with an exhaust pipeline, the flow gauge is arranged on the exhaust pipeline, a lens protection pipeline is communicated between the air pump and the dust concentration detection instrument, one end of the lens protection pipeline is connected onto the exhaust pipeline, the other end is a purging end opening communicated with a detection chamber, and the position of the purging end opening is matched with the position of a lens surface of the dust concentration detection instrument. The online detection system can perform the calibration on site, the accuracy of a detection result is ensured, a lens of the dust concentration detection instrument can be effectively protected, and the dust attachment can be prevented.

Description

technical field [0001] The invention relates to an on-line particle detection system and method suitable for urban rail transit sites. Background technique [0002] The dust concentration detection system is used to measure the concentration of dust or particulate matter in open spaces. It can be widely used in various industries for online real-time dust concentration monitoring of factories, working environments, work spaces, offices, outdoor spaces, etc., as well as special monitoring of mines and coal mines. Dust concentration monitoring in industrial working environments. [0003] However, the concentration of particulate matter in urban rail transit sites also needs to be detected online. Due to the large flow of people in urban rail transit sites, ground dust will be raised, and subway operations will also produce some metal particles. Excessive concentration of these particles will cause harm to the human body . The main principle of the current online detection of...

AI Technical Summary

Problems solved by technology

[0005] The first technical problem to be solved by the present invention is to provide an on-line particle detection system suitable for urban rail transit sites. The on-line detection system can be calibrated on site to ensure the accuracy of the detection results and effectively protect the dust concentration detection. The lens of the instrument avoids dust adhesion, which solves the problems of inaccurate detection results and short service life of the previous detection system

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