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Detection device and detection method for number concentration of fine particulate matter in motor vehicle exhaust gas

A technology for fine particles and measuring devices, which is applied in the fields of measuring devices, particle suspension analysis, suspension and porous material analysis, etc. It can solve the problems of measurement error and other problems, achieve reduced measurement errors, high stability and accuracy, and easy operation. Effect

Active Publication Date: 2016-03-23
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

Due to the high temperature of the exhaust gas emitted by motor vehicles, most of the measurement technologies need to cool and dilute the exhaust gas of motor vehicles before it can be analyzed and measured. During this process, the volatile and semi-volatile substances in the exhaust gas may be Condensation occurs, which brings errors to the measurement results, and domestic research on the measurement technology of fine particle number concentration emitted by motor vehicles is still in its infancy

Method used

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  • Detection device and detection method for number concentration of fine particulate matter in motor vehicle exhaust gas
  • Detection device and detection method for number concentration of fine particulate matter in motor vehicle exhaust gas
  • Detection device and detection method for number concentration of fine particulate matter in motor vehicle exhaust gas

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with accompanying drawing:

[0037] Such as Figure 1-Figure 2 The device for measuring the number concentration of fine particles in motor vehicle exhaust includes an air source 1, a jet pump 2, a filter drier 3, an ion source module 4, a charging area 7, an injection throat 8, and a capture voltage module 9 , Exhaust gas discharge pipe 5, cyclone PM2.5 cutter 6 and electrometer 10. When the air in the air source passes through the jet pump, an air flow is generated, and the flow rate of the air flow is constant, that is, the flow rate of the later clean air flow is also constant, and is not affected by the flow change in the exhaust pipe.

[0038] Further, the ion source module 4 includes a high-voltage electrode 21, a first insulating sleeve 22, an air inlet pipe 23, an air inlet 24, a tungsten needle 34, an ion injection port 33 and a first electrode interface 29; The area 7 includes an outer sle...

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Abstract

The invention relates to a detection device and a detection method for number concentration of fine particulate matters in motor vehicle exhaust gas. The detection device includes: an air source, a jet pump, a filtering drier, an ion source module, a charging zone, a jet throat part, a capture voltage module, a tail gas exhaust tube, a cyclone PM2.5 cutter, and an electrometer. The detection device and the detection method can solve the defects in the prior art, and can achieve quick measurement on the number concentration of fine particulate matters in the motor vehicle exhaust gas even without pre-treatment on the motor vehicle exhaust gas.

Description

technical field [0001] The invention relates to the technical field of atmospheric aerosol monitoring, in particular to a measuring device and method for the number concentration of fine particles in motor vehicle exhaust. Background technique [0002] Motor vehicle exhaust particulate matter is more harmful to the environment and human body, and the emission regulations formulated by various countries have increasingly stringent measurement standards. Taking the European Union as an example, light-duty vehicles implemented the Euro 6 standard in 2014, which stipulates that the emission limit of particulate matter from light-duty vehicles is 10% stricter than the Euro 5 standard. Heavy-duty vehicle engines implemented the Euro 6 standard in 2013, and the number of particulate matter (PN: 6*10e11 km -1 ) into the regulations, the particulate matter emission limit of heavy-duty diesel engines is 67% stricter than the Euro 5 standard. On September 17, 2013, the Ministry of En...

Claims

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Application Information

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IPC IPC(8): G01N15/06
CPCG01N15/0656
Inventor 刘建国余同柱桂华侨王焕钦张礁石程寅杨义新杜朋陆亦怀刘文清王杰
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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