CN202256135U - Anti-interference gas sample cell in spectrometric detection - Google Patents
Anti-interference gas sample cell in spectrometric detection Download PDFInfo
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- CN202256135U CN202256135U CN2011202791540U CN201120279154U CN202256135U CN 202256135 U CN202256135 U CN 202256135U CN 2011202791540 U CN2011202791540 U CN 2011202791540U CN 201120279154 U CN201120279154 U CN 201120279154U CN 202256135 U CN202256135 U CN 202256135U
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- sample cell
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Abstract
The utility model discloses an anti-interference gas sample cell in spectrometric detection, which relates to the technical field of spectrometric gas on-line sensing and monitoring. The front and back walls in the tube body of the sample cell are respectively provided with a wedge-shaped window, and the sample cell part between the two wedge-shaped windows is used as a standard gas sample cell region; a nitrogen gas inlet port and a nitrogen gas exhaust port are respectively arranged above and below the center of the front/back wall, so that interference gas in flow passages between the front and back walls of the tube body of the sample cell and the corresponding wedge-shaped windows is completely discharged; and the center of the front/back wall of the tube body of the sample cell is respectively provided with a fiber input/output interface with a coupling lens. The utility model can resist the influence of interference gas, simplify the structure of the spectrometric gas sensor and enhance the measurement precision and stability of the system.
Description
Technical field
The utility model relates to the online fields of sensing technique monitoring of spectrum formula gas, particularly relates to a kind of anti-tampering gas sample cell that is used for the online spectral signal calibration of spectral detection and proofreaies and correct.
Background technology
The online sensing technology of spectrum formula gas has in environmental monitoring, fire and security alerting system and medication chemistry widely to be used.In spectrum formula gas detecting instrument; The calibrating gas sample cell of one calibration usefulness all is set between light source and spectroscopic analysis system; Measuring beam is gone into spectroscopic analysis system and is carried out spectral analysis through sample cell is laggard, as the reference of signal intensity in detecting and confirming of signal location.
When conventional calibrating gas sample cell is used for spectral analysis, mainly there is the problem of following three aspects:
1, there is the space between sample cell and light source and the spectroscopic analysis system, contains the interference of various interference gas compositions, particularly composition of air in the space.Measuring beam during through the space because the existence of interference gas and certain error is introduced in spectral analysis, thereby reduced the precision of analysis result.
2, pool wall all adopts the vertical plane glass window before and after the sample cell.This glass window structure makes when measuring beam is propagated between the both ends of the surface of sample cell, produces interference effect, and light source output power is caused certain interference, makes testing result produce certain error.
3, for make as much as possible measuring beam along optical axis direction through the whole sample pond, generally need fit lens and respective holder, regulate being achieved again through light path repeatedly, increased the structural volume of cost and monitoring instrument.
The utility model content
To the defective that exists in the above-mentioned prior art, the purpose of the utility model is that the anti-interference gases affect of a kind of ability is provided, simplifies spectrum formula gas sensor configuration, improves systematic survey degree of accuracy and the stable anti-tampering gas sample cell that is used directly in the line demarcation.
In order to solve the problems of the technologies described above, the utility model is realized through following technical scheme:
Anti-tampering gas sample cell in the spectral detection, comprise sample cell body, valve, wedge window, nitrogen air intake opening, nitrogen exhausr port, have coupled lens the optical fiber input interface, have the optical fiber output interface and the runner of coupled lens.A wedge window is respectively installed near front and back pool wall place in said sample cell body inside, to eliminate the loss of interference effect, minimizing source device output optical power.
Further, said sample cell body upper center is through being full of calibrating gas in the calibrating gas sample cell zone of a valve between two wedge window, and valve melting welding encapsulates the most at last.
Further; Pool wall all has a nitrogen air intake opening in the top, center separately before and after the said sample cell body, its separately central lower all have a nitrogen exhausr port, nitrogen is imported by the nitrogen air intake opening; Through the runner between front and back pool wall and the corresponding wedge window; Finally discharge, thereby make interference gas from runner, discharge fully, to improve the precision of measurement result from corresponding nitrogen exhausr port.
Further, the optical fiber input interface that has coupled lens is installed at the pool wall center before the said sample cell body, and the optical fiber output interface that has coupled lens is installed at the pool wall center thereafter, to simplify apparatus structure.
Compared with prior art, the utility model has the advantages that:, eliminated interference effect because a wedge window is all installed near front and back pool wall place in sample cell body inside; Avoid reflected light to turn back to light source simultaneously, strengthened the stability of light source output power; Owing to before and after sample cell, have nitrogen air intake opening and nitrogen exhausr port on the pool wall, make that the interference gas in the runner is discharged fully, improved the precision of measurement result; And pool wall is connected to optical fiber input interface and the optical fiber output interface that has coupled lens respectively before and after the sample cell body, has simplified the complicacy that apparatus structure and light path are regulated, and has improved the measuring accuracy and the stability of system.
Description of drawings
Fig. 1 is the structural representation of the anti-tampering gas sample cell in the utility model embodiment spectral detection.
Embodiment
Consult the embodiment of Fig. 1 for the anti-tampering gas sample cell in the utility model spectral detection; Anti-tampering gas sample cell in the spectral detection comprises sample cell body 1, valve 2, wedge window 3, nitrogen air intake opening 4, nitrogen exhausr port 6, the optical fiber input interface 5 that has coupled lens, the optical fiber output interface 7 that has coupled lens and runner 8.
The sample cell part that respectively install between 3, two wedge window 3 of a wedge window near front and back pool wall place sample cell body 1 inside is regional as the calibrating gas sample cell; Sample cell body 1 upper center is full of calibrating gas through valve 2 in the standard model pool area, valve melting welding encapsulation the most at last; Top, pool wall center, sample cell body 1 front and back all has a nitrogen air intake opening 4, and its central lower all has a nitrogen exhausr port 6, between sample cell body 1 front and back pool wall and corresponding wedge window 3, forms runner 8; The optical fiber input interface 5 that has coupled lens is installed at the pool wall center before the sample cell body 1, and the optical fiber output interface 7 that has coupled lens is installed at pool wall center, sample cell pipe 1 back.
The above is merely the specific embodiment of the utility model; But the technical characterictic of the utility model is not limited thereto; Any those skilled in the art is in the field of the utility model, and variation of being done or modification all are encompassed among the claim of the utility model.
Claims (2)
1. the anti-tampering gas sample cell in the spectral detection is characterized in that: form runner (8) between pool wall and the corresponding wedge window (3) before and after this sample cell body (1).
2. the anti-tampering gas sample cell in the spectral detection as claimed in claim 1 is characterized in that: top, pool wall center all has a nitrogen air intake opening (4) before and after this sample cell body (1), and its central lower all has a nitrogen exhausr port (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202791540U CN202256135U (en) | 2011-07-29 | 2011-07-29 | Anti-interference gas sample cell in spectrometric detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202791540U CN202256135U (en) | 2011-07-29 | 2011-07-29 | Anti-interference gas sample cell in spectrometric detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202256135U true CN202256135U (en) | 2012-05-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202791540U Expired - Fee Related CN202256135U (en) | 2011-07-29 | 2011-07-29 | Anti-interference gas sample cell in spectrometric detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202256135U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713831A (en) * | 2015-02-09 | 2015-06-17 | 中国石油大学(华东) | Interference elimination method for spectral gas analyzer |
| CN113281300A (en) * | 2021-05-21 | 2021-08-20 | 中国人民解放军战略支援部队航天工程大学 | Measuring device for high-sensitivity measurement of weak absorption gas parameters in narrow environment |
-
2011
- 2011-07-29 CN CN2011202791540U patent/CN202256135U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713831A (en) * | 2015-02-09 | 2015-06-17 | 中国石油大学(华东) | Interference elimination method for spectral gas analyzer |
| CN113281300A (en) * | 2021-05-21 | 2021-08-20 | 中国人民解放军战略支援部队航天工程大学 | Measuring device for high-sensitivity measurement of weak absorption gas parameters in narrow environment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Zheng Qianying Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20130729 |