CN201429533Y - Dual-air passage sampling sensor - Google Patents
Dual-air passage sampling sensor Download PDFInfo
- Publication number
- CN201429533Y CN201429533Y CN2009201856150U CN200920185615U CN201429533Y CN 201429533 Y CN201429533 Y CN 201429533Y CN 2009201856150 U CN2009201856150 U CN 2009201856150U CN 200920185615 U CN200920185615 U CN 200920185615U CN 201429533 Y CN201429533 Y CN 201429533Y
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- sampling
- gas circuit
- air
- reflection chamber
- photodetector
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Abstract
A dual-air passage sampling sensor together combines a first sampling reflecting cavity above a clear air sampling air passage and a second sampling reflecting cavity above an air sampling air passagewith high dust concentration, the two reflecting cavities are sealed through a plane antireflective lens, thereby preventing the mixing between the two types of sampling air. A laser light beam passes through focuses of the two reflecting cavities after alignment, the vertical directions of the two sampling air passages also pass through the two focuses, at the moment, diffusion light signals ofdust granules are concentrated at the other focus of two ellipsoids, and are converted into electrical signals through a photorectifier or a photoelectric electron-multiplier tube, and are processed by a circuit, then the size and the number of the dust granules which are respectively collected by the front and the rear cavities are obtained, thereby the filtering efficiency of a detected filter is obtained. The sensor can simultaneously monitor the dust granules above and under the detected filter through a dual-sampling air passage under the same light source, realizes the synchronism of thedetection, greatly reduces the error of systems, and simultaneously greatly reduces the measuring time based on improving the detection precision.
Description
Technical field
The utility model relates to optical sensor in the filtrator checkout equipment of a kind of clean field, relates in particular to a kind of double air channels sampling sensor.
Background technology
In the prior art, two airborne particle counters of the general employing of the detection of filtrator filtration efficiency are tested the upstream and downstream dust granules of tested filtrator and are drawn filtration efficiency, perhaps adopt an airborne particle counter front and back switch test upstream and downstream dust granules to calculate filtration efficiency again.Exist counting error to cause test result that error is arranged between the former two counters, latter's different time sections test existence dust concentration changes and causes measuring error, and these two kinds of test mode costs are higher, and the test duration is longer.
The utility model content
In order to overcome the deficiencies in the prior art, the technical problems to be solved in the utility model provides a kind of double air channels sampling sensor, it can be monitored tested filtrator upstream and downstream dust granules simultaneously in following pair of sampling of same light source gas circuit, the synchronism and the systematic error that have realized test greatly reduce, and Measuring Time also shortens dramatically when improving accuracy of detection.
For solving above technical matters, the technical scheme that the utility model is taked is:
A kind of double air channels sampling sensor, it comprises:
One is arranged on the plane antireflection mirror on the laser beam direction behind the collimation;
The pure air sampling gas circuit and the high dust content air sampling gas circuit that are separately positioned on the described plane antireflection mirror left and right sides and intersect with laser beam;
Be separately positioned on the described pure air sampling gas circuit first sampling reflection chamber and first photodetector of both sides up and down;
Be separately positioned on the described high dust content air sampling gas circuit second sampling reflection chamber and second photodetector of both sides up and down;
The described pure air sampling gas circuit and first photodetector lay respectively on two different focuses of the described first sampling reflection chamber, the described high dust content air sampling gas circuit and second photodetector lay respectively on two different focuses of the described second sampling reflection chamber, and described plane antireflection mirror is used for described pure air sampling gas circuit and high dust content air sampling gas circuit are sealed reliably.
In technical scheme further, the described first sampling reflection chamber and second reflection chamber of sampling is an ellipsoidal reflector.
In technical scheme further, described first photodetector and second photodetector are photodiode or photomultiplier.
Because the enforcement of above technical scheme, the utility model compared with prior art has following advantage:
Because the utility model gathers together the sample first sampling reflection chamber of gas circuit top and the second sampling reflection chamber of high dust content air sampling gas circuit top of pure air, seal by the plane antireflection mirror between the first sampling reflection chamber and the second sampling reflection chamber, to prevent the mixing of sample gas between the two.The pure air in the first sampling reflection chamber acquisition filter device downstream, there is influence hardly in this power to LASER Light Source, the high dust content air in the second sampling reflection chamber acquisition filter device upstream, two sampling cavitys can adopt identical ellipsoidal reflector.Laser beam behind the collimation is through a focus of two ellipsoidal reflectors, two sampling gas circuit vertical direction are also passed through this two focuses, this moment, the scattered light signal of dust granules will be assembled in another focus of two ellipsoids, convert electric signal to through photodiode or photomultiplier, the size and the quantity of the dust granules that collects separately of cavity before and after processing of circuit obtains again draw the filtration efficiency of tested filtrator as calculated.
Compared with prior art, the utility model can be monitored tested filtrator upstream and downstream dust granules simultaneously in following pair of sampling of same light source gas circuit, the synchronism and the systematic error that have realized test greatly reduce, and Measuring Time also shortens dramatically when improving accuracy of detection.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model;
Wherein:
1, laser beam; 2, plane antireflection mirror; 3, pure air sampling gas circuit; 4, high dust content air sampling gas circuit; 5, the first sampling reflection chamber; 6, first photodetector; 7, the second sampling reflection chamber; 8, second photodetector.
Embodiment
A kind of double air channels sampling sensor as shown in Figure 1, it comprises:
One is arranged on the plane antireflection mirror 2 on laser beam 1 direction behind the collimation;
The pure air sampling gas circuit 3 and the high dust content air sampling gas circuit 4 that are separately positioned on described plane antireflection mirror 2 left and right sides and intersect with laser beam 1;
Be separately positioned on the first sampling reflection chamber 5 and first photodetector 6 of described pure air sampling gas circuit both sides about in the of 3;
Be separately positioned on the second sampling reflection chamber 7 and second photodetector 8 of described high dust content air sampling gas circuit both sides about in the of 4;
The described pure air sampling gas circuit 3 and first photodetector 6 lay respectively on two different focuses of the described first sampling reflection chamber 5, the described high dust content air sampling gas circuit 4 and second photodetector 8 lay respectively on two different focuses of the described second sampling reflection chamber 7, and described plane antireflection mirror 2 is used for described pure air sampling gas circuit 3 is sealed reliably with high dust content air sampling gas circuit 4.
The described first sampling reflection chamber 5 and the second sampling reflection chamber 7 are ellipsoidal reflector.
Described first photodetector 6 and second photodetector 8 are photodiode or photomultiplier.
The utility model gathers together the sample second sampling reflection chamber 7 of first sampling reflection chamber 5 and high dust content air sampling gas circuit 4 tops of gas circuit 3 tops of pure air, seal by plane antireflection mirror 2 between the first sampling reflection chamber 5 and the second sampling reflection chamber 7, to prevent the mixing of sample gas between the two.
The first sampling reflection chamber 5 is used for the pure air in acquisition filter device downstream, there is influence hardly in this power to LASER Light Source, the second sampling reflection chamber 7 is used for the high dust content air in acquisition filter device upstream, and two sampling cavitys can adopt identical ellipsoidal reflector.
Compared with prior art, the utility model can be monitored tested filtrator upstream and downstream dust granules simultaneously in following pair of sampling of same light source gas circuit, the synchronism and the systematic error that have realized test greatly reduce, and Measuring Time also shortens dramatically when improving accuracy of detection.
The foregoing description only is explanation technical conceive of the present utility model and characteristics; its purpose is to allow the personage that is familiar with this art can understand content of the present utility model and is implemented; can not limit protection domain of the present utility model with this; all equivalences of being done according to the utility model spirit change or modify, and all should be encompassed in the protection domain of the present utility model.
Claims (3)
1, a kind of double air channels sampling sensor, it is characterized in that: it comprises:
One is arranged on the plane antireflection mirror (2) on laser beam (1) direction behind the collimation;
The pure air sampling gas circuit (3) and the high dust content air sampling gas circuit (4) that are separately positioned on described plane antireflection mirror (2) left and right sides and intersect with laser beam (1);
Be separately positioned on described pure air sampling gas circuit (3) first sampling reflection chamber (5) and first photodetector (6) of both sides up and down;
Be separately positioned on described high dust content air sampling gas circuit (4) second sampling reflection chamber (7) and second photodetector (8) of both sides up and down;
Described pure air sampling gas circuit (3) and first photodetector (6) lay respectively on two different focuses of the described first sampling reflection chamber (5), described high dust content air sampling gas circuit (4) and second photodetector (8) lay respectively on two different focuses of the described second sampling reflection chamber (7), and described plane antireflection mirror (2) is used for described pure air sampling gas circuit (3) and high dust content air sampling gas circuit (4) are sealed reliably.
2, a kind of double air channels sampling sensor according to claim 1 is characterized in that: the described first sampling reflection chamber (5) is an ellipsoidal reflector with the second sampling reflection chamber (7).
3, a kind of double air channels sampling sensor according to claim 1 is characterized in that: described first photodetector (6) and second photodetector (8) are photodiode or photomultiplier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201856150U CN201429533Y (en) | 2009-06-24 | 2009-06-24 | Dual-air passage sampling sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201856150U CN201429533Y (en) | 2009-06-24 | 2009-06-24 | Dual-air passage sampling sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201429533Y true CN201429533Y (en) | 2010-03-24 |
Family
ID=42033272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201856150U Expired - Lifetime CN201429533Y (en) | 2009-06-24 | 2009-06-24 | Dual-air passage sampling sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201429533Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587053B (en) * | 2009-06-24 | 2010-12-08 | 苏州苏净仪器自控设备有限公司 | Double air channels sampling sensor |
| CN104089862A (en) * | 2014-07-24 | 2014-10-08 | 常州市武进区半导体照明应用技术研究院 | Device and method for detecting particles in air and wearable equipment comprising device |
-
2009
- 2009-06-24 CN CN2009201856150U patent/CN201429533Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587053B (en) * | 2009-06-24 | 2010-12-08 | 苏州苏净仪器自控设备有限公司 | Double air channels sampling sensor |
| CN104089862A (en) * | 2014-07-24 | 2014-10-08 | 常州市武进区半导体照明应用技术研究院 | Device and method for detecting particles in air and wearable equipment comprising device |
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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: 20100324 Effective date of abandoning: 20090624 |