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Aerosol particle sampling and detecting method and device based on energy trap method

An aerosol particle and detection device technology, applied in the direction of measuring device, sampling device, individual particle analysis, etc., can solve the problems of complex structure of the equipment, can only detect less than a certain level, cumbersome operation, etc., achieve small size, realize real-time The effect of detection and manual operation is small

Active Publication Date: 2014-04-02
HEFEI JUNDA HI TECH INFORMATION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention proposes a method and device for sampling and detecting aerosol particles based on the energy trap method, which can detect aerosol particles with a size range of determined upper and lower limits, so as to solve the existing sampling and detection of aerosol particles The method and device must have a sampling cutter, and the equipment has a complex structure, requires replacement of filter paper, cumbersome operation, and can only detect aerosol particles below a certain upper limit size

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  • Aerosol particle sampling and detecting method and device based on energy trap method

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Embodiment 1

[0038] Embodiment 1. Aerosol particle sampling and detection device and method based on spatial light energy trap method

[0039] Figure 4 It is a structural schematic diagram of Embodiment 1 of the energy trap-based aerosol particle sampling and detection device of the present invention.

[0040] Such as Figure 4 As shown, the device includes a laser 1, a beam expander 2, a first lens 3, a spatial light modulator 4, a beam splitting prism 5, an illumination light source 6, a second lens 7, a detection cavity 8, a third lens 9, a filter Light sheet 10, CCD11. In this embodiment a CCD is used as the photodetector.

[0041] Wherein, the continuous laser beam emitted by the laser 1 is expanded by the beam expander 2, collimated by the first lens 3, and irradiated onto the spatial light modulator 4, and the spatial light modulator 4 modulates the laser light and outputs it. For a transmissive spatial light modulator, the laser is transmitted and output; for a reflective spat...

Embodiment 2

[0050] Embodiment 2. Measuring device and method for real-time measurement of PM2.5 particles based on spatial light energy trap method

[0051] The structure of the device used in embodiment 2 is the same as that in embodiment 1. In embodiment 2, the write signal of the spatial light modulator 4 is adjusted. At this time, the CCD 11 records the image of the bound aerosol particles, and the image is input to the external The information processing device performs processing.

[0052] Considering that the number of aerosol particles captured and bound by the space light energy field has a distribution similar to a normal distribution with respect to its size, and the center of the distribution is the size of the light bottle, therefore, when measuring PM2.5, it is possible to generate The size of the light energy trap varies within the range of 0.1 μm to 4.5 μm, preferably between 0.1 μm to 2.5 μm, more preferably 1.7 μm to 1.9 μm, for example 1.7 μm. As a result, most of the ...

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Abstract

The invention discloses an aerosol particle sampling and detecting device and a method which are used for sampling and detecting aerosol particles in a certain amount of aerosol. The sampling and detecting device comprises a laser device, a spatial light modulator and a detection cavity; the laser device emits laser to the spatial light modulator (4); the spatial light modulator modulates the laser and then outputs the modulated laser to the detection cavity; the aerosol is accommodated in the detection cavity (8), and the laser emitted in the detection cavity forms a spatial light energy trap field in the detection cavity; the spatial light energy trap field comprises a plurality of light bottles; the light bottles are each of a spatial bottle-shaped structure with a bright area on the circumference and a dark area at the center, and can selectively constraint the aerosol particles having the same order of magnitude of sizes as that of the light bottles inside. The aerosol particle sampling and detecting device is simple in structure, convenient to carry and wide in detection size scope, and can real-timely detect the aerosol particles with the different sizes.

Description

technical field [0001] The invention belongs to the technical field of environmental air collection and monitoring, in particular to an aerosol particle sampling and detection method and device for real-time measurement of the particle size distribution and concentration of light-absorbing aerosol particles in the atmosphere. The invention can be applied to the collection and detection of light-absorbing PM2.5 particles in the atmosphere. Background technique [0002] Atmospheric environment has a vital impact on people's health, and inhalable particulate matter in the atmosphere has always been the focus of atmospheric environment monitoring. An atmosphere containing particulate matter can be considered an aerosol. [0003] Aerosol refers to a colloidal dispersion system formed by solid or liquid particles dispersed and suspended in a gas medium, also known as a gas dispersion system. The dispersed phase is solid or liquid particles with a size of 0.001-100 microns, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/10G01N15/14
Inventor 张青川张志刚刘丰瑞刘爽程腾张勇伍小平
Owner HEFEI JUNDA HI TECH INFORMATION TECH
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