Aerodynamic size spectrometer

An aerodynamic and particle size spectrometer technology, applied in scientific instruments, particle size analysis, particle suspension analysis, etc., can solve problems affecting test accuracy, particle loss, measurement accuracy error, etc., achieve high sensitivity and avoid particle loss , the effect of high detection accuracy

Inactive Publication Date: 2012-07-25
北京汇丰隆生物科技发展有限公司
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Problems solved by technology

The problems with this type of method are: firstly, since these two methods need to collect the particles of PM10 or PM2. The phenomenon of rebound and particle backflow makes the particle loss, which affects the test accuracy
Secondly, it is necessary to deposit a certain amount of particles before detection, so the detection speed is slow and real-time detection cannot be realized, and information cannot be obtained in time for some sudden events
[0004] In addition, in addition to the above two detection methods, peopl

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] figure 1 It is a schematic diagram of an aerodynamic particle size spectrometer according to an embodiment of the present invention; as shown in the figure, the aerodynamic particle size spectrometer includes:

[0030] A sample flow sampling device 101, one end of which collects ambient air, and transports the collected ambient air sample flow to the particle beam collimation acceleration nozzle 102 connected to it through the other end;

[0031] The p...

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Abstract

The invention discloses an aerodynamic size spectrometer, which comprises a sample flow injection device, a particle beam collimation and acceleration nozzle, a shell flow device, a light beam focusing and reshaping device, a photoelectric detector, a signal detecting and processing module, and a micro-control and display module. The aerodynamic size spectrometer adopts flight time to measure aerodynamic diameter, and preceding stage particle size cutting and sampling is not needed, so that the particle loss is avoided, the sensitivity is high, and the accuracy of detection is high.

Description

technical field [0001] The invention relates to the field of air quality detection, in particular to an aerodynamic particle size spectrometer. Background technique [0002] In the atmosphere, pollutants are mostly attached to the surface of aerosol particles. The particle size of aerosols is generally 0.001-100 microns. It has been found that particles with an aerodynamic diameter above 50 microns cannot enter the human body due to gravity. Particles in the range of 10-50 microns can only enter the nasopharynx, particles in the range of 2.5-10 microns can usually enter the bronchi, and 80% of the particles below 2.5 microns can enter the alveoli of the human body. It has been reported that particles below 10 microns, especially those below 2.5 microns, are one of the main causes of the spread of respiratory diseases and lung diseases. In order to prevent the harm of PM10 particles to the human body, many countries at home and abroad have successively established PM10 stand...

Claims

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Application Information

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IPC IPC(8): G01N15/02G01N15/06
Inventor 刘毅刘航刘强张晓清宁海波刘爱明吕云峰
Owner 北京汇丰隆生物科技发展有限公司
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