CN203148815U - Optical device for detecting mass concentration of aerosol - Google Patents
Optical device for detecting mass concentration of aerosol Download PDFInfo
- Publication number
- CN203148815U CN203148815U CN 201320159400 CN201320159400U CN203148815U CN 203148815 U CN203148815 U CN 203148815U CN 201320159400 CN201320159400 CN 201320159400 CN 201320159400 U CN201320159400 U CN 201320159400U CN 203148815 U CN203148815 U CN 203148815U
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- light
- scattering
- photomultiplier
- diaphragm
- light source
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Abstract
The utility model discloses an optical device for detecting mass concentration of aerosol. The optical device for detecting the mass concentration of the aerosol comprises a laser light source generation assembly, a scattering cavity, a scattering light detection assembly and a main light beam absorption assembly, wherein the scattering cavity comprises a scattering cavity body, and a light inlet diaphragm, a gas inlet nozzle, a gas outlet nozzle and an extinction diaphragm which are installed on the scattering cavity body; the laser light source generation assembly is mounted at the side of the light inlet diaphragm of the scattering cavity body; the scattering light detection assembly is mounted at the upper end of scattering cavity and is vertical to the direction of laser beams generated by the laser light source generation assembly; the scattering light detection assembly comprises a field diaphragm, a quartz lens, a photomultiplier, a photomultiplier socket and a photomultiplier gland; the photomultiplier socket and the photomultiplier gland are used for fixing the photomultiplier; and the main light beam absorption assembly is mounted at the side of the extinction diaphragm of the scattering cavity body and comprises a light trap and a light trap seat. The optical device for detecting the mass concentration of the aerosol has few optical parts, a simple processing technology, low manufacturing cost, high signal to noise ratio and high detection sensitivity, and can eliminate stray light simply and effectively.
Description
Technical field
The utility model relates to a kind of optical devices, relates in particular to a kind of optical devices that detect aerosol quality and concentration.
Background technology
The leak hunting method of existing high efficiency particulate air filter, popular method are the DOP methods that MILSTD MIL-STD-282 recommends use, and the instrument that this method is used is aerosol photometer and aerosol generator.Existing aerosol photometer mainly contains the TDA-2H type aerosol photometer of ATI, and what this quasi-instrument adopted is the forward light scatterometry, the optics that this kind structure adopts is many, the processing technology complexity, cost height, problems such as parasitic light difficult treatment, in order to accomplish the influence of simple and effective elimination parasitic light, improve signal to noise ratio (S/N ratio) and detection sensitivity, and the optics that adopts is few, processing technology is simple, cost is low, must a kind of brand-new optical devices.
The utility model content
In order to solve deficiency of the prior art, the purpose of this utility model provides that a kind of optics is few, and processing technology is simple, and cost is low, signal to noise ratio (S/N ratio) and detection sensitivity height, the optical devices of detection aerosol quality and concentration that can simple and effective elimination parasitic light.
For achieving the above object, the technological means that the utility model adopts is: a kind of optical devices that detect aerosol quality and concentration comprise LASER Light Source generating assembly, scattering chamber, scattered light detection components, main beam absorbent assembly; Described scattering chamber comprises the scattering cavity, and is installed in and advances light diaphragm, air inlet valve, the valve of giving vent to anger, delustring diaphragm on the scattering cavity; What described LASER Light Source generating assembly was installed in the scattering cavity advances light diaphragm side, comprises the laser instrument, light source fixed head, light source adjustment seat, light source base, iris, the light source collimation chamber that connect successively; It is vertical with the beam direction that the LASER Light Source generating assembly produces that described scattered light detection components is installed in upper end, scattering chamber, comprise field stop, fused silica glass, photomultiplier, and fixedly photomultiplier transit tube socket and the photomultiplier gland of photomultiplier; Described main beam absorbent assembly is installed in the delustring diaphragm side of scattering cavity, comprises light trapping and light trapping seat.
Further, describedly advance the light diaphragm, the delustring diaphragm all is fixedly mounted on the scattering cavity by O-ring seal.
The beneficial effects of the utility model are: this device optics is few, and processing technology is simple, and cost of manufacture is low; The light intensity of scattering detects the mass particle concentration that unit volume contains in the air-flow when measuring that particle is through laser beam in the air-flow, and signal to noise ratio (S/N ratio) and detection sensitivity height can simple and effective elimination parasitic lights.
Description of drawings
Below in conjunction with accompanying drawing the technical solution of the utility model is described.
Fig. 1 is cross-sectional view of the present utility model.
Among the figure: 1, the LASER Light Source generating assembly, 11, laser instrument, 12, the light source fixed head, 13, the light source adjustment seat, 14, light source base, 15, iris, 16, light source collimation chamber, 17, laser beam, 2, the scattering chamber, 21, the scattering cavity, 22, advance the light diaphragm, 23, the air inlet valve, 24, the valve of giving vent to anger, 25, the delustring diaphragm, 26, O-ring seal, 3, the scattered light detection components, 31, field stop, 32, fused silica glass, 33, photomultiplier, 34, the photomultiplier transit tube socket, 35, the photomultiplier gland, 4, the main beam absorbent assembly, 41, light trapping, 42, the light trapping seat.
Embodiment
A kind of optical devices that detect aerosol quality and concentration as shown in Figure 1 comprise LASER Light Source generating assembly 1, scattering chamber 2, scattered light detection components 3, main beam absorbent assembly 4; Described scattering chamber 2 comprises scattering cavity 21, and is installed in and advances light diaphragm 22, air inlet valve 23, the valve 24 of giving vent to anger, delustring diaphragm 25 on the scattering cavity 21; What described LASER Light Source generating assembly 1 was installed in scattering cavity 21 advances light diaphragm 22 sides, comprises the laser instrument 11, light source fixed head 12, light source adjustment seat 13, light source base 14, iris 15, the light source collimation chamber 16 that connect successively; It is vertical with the beam direction that LASER Light Source generating assembly 1 produces that described scattered light detection components 3 is installed in scattering cavity 21 upper ends, comprise field stop 31, fused silica glass 32, photomultiplier 33, and fixedly photomultiplier transit tube socket 34 and the photomultiplier gland 35 of photomultiplier 33; Described main beam absorbent assembly 4 is installed in delustring diaphragm 25 sides of scattering cavity 21, comprises light trapping 41 and light trapping seat 42.
Further, describedly advance light diaphragm 22, delustring diaphragm 25 all is fixedly mounted on the scattering cavity 21 by O-ring seal 26.
Laser beam takes place in the laser instrument 11 of LASER Light Source generating assembly 1, through iris 15 laser beam 17 is adjusted to suitable light intensity, shield most of parasitic light that light source produces simultaneously, after once eliminate parasitic light again and handle through advancing light diaphragm 22, light beam enters scattering cavity 21, be radiated at the particle flux that enters from air inlet valve 23 scattering takes place, scattered light sees through fused silica glass 32 through field stop 31 and enters the photomultiplier 33 generations electric signal corresponding with scattering strength, and laser beam 17 main beams enter light trapping seat 42 through scattering chamber delustring diaphragm 25 and are radiated on the light trapping 41 by light trapping 41 continuous reflection-absorption.
Compared with prior art, of the present invention to have an optics few, and no optics lens in the light path reduce the possibility that the contaminated back of optical device reduces signal intensity; Two mechanisms of diaphragm are effectively eliminated the influence of parasitic light, the light intensity of scattering detects the mass particle concentration that unit volume contains in the air-flow when measuring that particle is through laser beam in the air-flow, improves signal to noise ratio (S/N ratio) greatly, the detection sensitivity height, and processing technology is simple, and cost of manufacture is low.
Embodiment of the present utility model explains, and is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the utility model discloses, and can expect easily changing or replacing, and all should be encompassed within the protection domain of the present utility model.
Claims (2)
1. optical devices that detect aerosol quality and concentration is characterized in that: comprise LASER Light Source generating assembly (1), scattering chamber (2), scattered light detection components (3), main beam absorbent assembly (4); Described scattering chamber (2) comprises scattering cavity (21), and is installed in and advances light diaphragm (22), air inlet valve (23), the valve of giving vent to anger (24), delustring diaphragm (25) on the scattering cavity (21); What described LASER Light Source generating assembly (1) was installed in scattering cavity (21) advances light diaphragm (22) side, comprises the laser instrument (11), light source fixed head (12), light source adjustment seat (13), light source base (14), iris (15), the light source collimation chamber (16) that connect successively; It is vertical with the beam direction that LASER Light Source generating assembly (1) produces that described scattered light detection components (3) is installed in scattering cavity (21) upper end, comprise field stop (31), fused silica glass (32), photomultiplier (33), and fixedly photomultiplier transit tube socket (34) and the photomultiplier gland (35) of photomultiplier (33); Described main beam absorbent assembly (4) is installed in delustring diaphragm (25) side of scattering cavity (21), comprises light trapping (41) and light trapping seat (42).
2. the optical devices of detection aerosol quality and concentration according to claim 1 is characterized in that: describedly advance light diaphragm (22), delustring diaphragm (25) all is fixedly mounted on the scattering cavity (21) by O-ring seal (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320159400 CN203148815U (en) | 2013-04-02 | 2013-04-02 | Optical device for detecting mass concentration of aerosol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320159400 CN203148815U (en) | 2013-04-02 | 2013-04-02 | Optical device for detecting mass concentration of aerosol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203148815U true CN203148815U (en) | 2013-08-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320159400 Withdrawn - After Issue CN203148815U (en) | 2013-04-02 | 2013-04-02 | Optical device for detecting mass concentration of aerosol |
Country Status (1)
| Country | Link |
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| CN (1) | CN203148815U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196805A (en) * | 2013-04-02 | 2013-07-10 | 青岛众瑞智能仪器有限公司 | Optical device for detecting aerosol mass concentration |
| CN103712914A (en) * | 2013-12-25 | 2014-04-09 | 广州禾信分析仪器有限公司 | Laser cavity ring-down spectrometer for simultaneous detection of aerosol extinction and scattering coefficients |
| CN104655538A (en) * | 2015-02-06 | 2015-05-27 | 苏州尚科洁净技术有限公司 | High-sensitivity aerosol detection sensor |
-
2013
- 2013-04-02 CN CN 201320159400 patent/CN203148815U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196805A (en) * | 2013-04-02 | 2013-07-10 | 青岛众瑞智能仪器有限公司 | Optical device for detecting aerosol mass concentration |
| CN103196805B (en) * | 2013-04-02 | 2015-09-16 | 青岛众瑞智能仪器有限公司 | A kind of optical devices detecting aerosol quality and concentration |
| CN103712914A (en) * | 2013-12-25 | 2014-04-09 | 广州禾信分析仪器有限公司 | Laser cavity ring-down spectrometer for simultaneous detection of aerosol extinction and scattering coefficients |
| CN103712914B (en) * | 2013-12-25 | 2016-08-17 | 广州禾信仪器股份有限公司 | Detection aerosol extinction and the laser cavity ring-down spectrometer of scattering coefficient simultaneously |
| CN104655538A (en) * | 2015-02-06 | 2015-05-27 | 苏州尚科洁净技术有限公司 | High-sensitivity aerosol detection sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130821 Effective date of abandoning: 20150916 |
|
| RGAV | Abandon patent right to avoid regrant |