CN102297841A - Flue gas automatic monitor based on optical fiber transmission and signal receiving - Google Patents
Flue gas automatic monitor based on optical fiber transmission and signal receiving Download PDFInfo
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- CN102297841A CN102297841A CN2011101341283A CN201110134128A CN102297841A CN 102297841 A CN102297841 A CN 102297841A CN 2011101341283 A CN2011101341283 A CN 2011101341283A CN 201110134128 A CN201110134128 A CN 201110134128A CN 102297841 A CN102297841 A CN 102297841A
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Abstract
The invention discloses a flue gas automatic monitor based on optical fiber transmission and signal receiving, belonging to the technical field of flue gas automatic monitoring. The measuring system of the invention comprises a light source, a transmitting optical fiber, a flue gas detector, a receiving optical fiber and a spectrograph. The light emitted by the light source is coupled to the transmitting optical fiber; after being subject to collimation with a lens, the light irradiates a cube-corner prism arranged at the other end of the flue gas detector; after being subject to reflection with the cube-corner prism, the light carries the characteristic absorption spectrum of the flue gas; after being subject to lens focusing again, the light is coupling to the receiving optical fiber and sent to a spectrometer for analyzing through the other end of the receiving optical fiber, so that the content of the gas under test in the flue is obtained. According to the invention, the optical fiber is used instead of the optical lens and reflector, so that the optical path is simplified, the adjustment of devices and the improvement of the signal-to-noise ratio of photoelectric detection signals are good to be realized. Simultaneously, the flue gas automatic monitor disclosed in the invention has the advantages of light weight and simple structure, and is helpful for being installed, maintained and being subject to dust prevention and heat dissipation.
Description
[technical field]:
The invention belongs to flue gas automatic monitoring technical field, specifically a kind of flue gas automonitor according to absorption spectrum measurement gas composition.
[background technology]:
In the monitoring of flue emission gases, can adopt the point type instrument to sample and analyze, but the space-time representativeness of this method sampling is relatively poor, and a point type monitoring instrument generally can only be monitored a kind of gas.Utilize the Differential Optical Absorption Spectroscopy of line sample mode to measure emission gases in the flue, measurement range is big, can realize that many components measure, and real-time online measuring continuously.Therefore, this method becomes the ideal tools of environmental pollution monitoring gradually.
Be subjected to the restriction of the common optical system structure of forming of lens and catoptron, in the flue gas automatic checkout system based on absorption spectrum, light source, flue gas probe, spectrometer can only be integrated the formula structure at present.During measurement, need flue gas probe is inserted flue, other parts link to each other with flue gas probe, directly are placed on the walling of flue.The whole measuring system parts are many, volume and weight is big, brought very big difficulty to installation and maintenance; Light source and spectrometer all are sealed in the dustproof casing, are unfavorable for heat radiation, and system's stability requirement of environment temperature to external world is very high; And, very high request has been proposed for the anticorrosion and protection of parts because institute's survey flue has stronger corrosivity usually.
[summary of the invention]:
The objective of the invention is to solve existing flue gas automonitor complex structure, installation and maintenance difficulty based on absorption spectrum, instrument is anticorrosion and the demanding problem of dispelling the heat, and a kind of flue gas automonitor that transmits and receives signal based on optical fiber is provided.
Provided by the inventionly transmit and receive the flue gas automonitor of signal, comprise light source 1, optical fiber coupled lens 2, launching fiber 3, receive optical fiber 4, collimation lens 5, prism of corner cube 6 and spectrometer 7 based on optical fiber.The continuous spectrum that light source 1 sends arrives launching fiber 3 incident ends through optical fiber coupled lens 2, after the exit end of launching fiber 3 penetrates, parallel ejaculation behind collimation lens 5 collimations, angle of arrival cone prism 6 backs are reflected along former direction, after focusing on, same collimation lens 6 enters reception optical fiber once more, after receive and send into spectrometer 7 after optical fiber 4 exit ends penetrate, carry out spectral detection by spectrometer 7.
Described light source, flue gas probe, spectrometer are absolute construction, carry out the signal transmission by launching fiber and reception optical fiber.Flue gas probe is made of collimation lens and prism of corner cube and the lens barrel of fixing them.
Advantage of the present invention and good effect: provided by the inventionly transmit and receive the flue gas automonitor of signal, light source and spectrometer can be independent of flue gas probe, by launching fiber with receive optical fiber and carry out the signal transmission based on optical fiber.Flue gas probe inserts in the flue, and light source and spectrometer are placed in and flue distance zone far away, thereby has reduced the weight of former monoblock type instrument, is beneficial to installation, safeguards and dustproof and heat radiation.Simultaneously, provided by the inventionly transmit and receive the flue gas automonitor of signal, reduced the quantity of optical lens and catoptron, simplified light path, the signal to noise ratio (S/N ratio) that helps adjusting instrument and improve photoelectric detecting signal based on optical fiber.
[description of drawings]:
Fig. 1 is the flue gas automonitor structural representation that transmits and receives signal based on optical fiber provided by the invention.
[embodiment]:
What Figure 1 shows that present embodiment provides transmits and receives the flue gas automonitor of signal based on optical fiber, and this instrument comprises light source 1, optical fiber coupled lens 2, launching fiber 3, receives optical fiber 4, collimation lens 5, prism of corner cube 6 and spectrometer 7.
During measurement, the continuous spectrum that is sent by light source 1 is coupled to launching fiber 3 incident ends through optical fiber coupled lens 2, after launching fiber transmission back is by its exit end ejaculation, parallel ejaculation behind collimation lens 5 collimations, angle of arrival cone prism 6 backs are reflected along former direction, after same collimation lens 5 focuses on, enter once more and receive optical fiber 4,, carry out spectral detection by spectrometer after reception optical fiber is sent into spectrometer after penetrating.But spectrometer obtains the concentration of gas in the flue according to the characteristic absorption spectrum inverting of gas.Described light source, flue gas probe, spectrometer are absolute construction, carry out the signal transmission by launching fiber and reception optical fiber.
Claims (3)
1. one kind transmits and receives the flue gas automonitor of signal based on optical fiber, it is characterized in that, comprises light source (1), optical fiber coupled lens (2), launching fiber (3), receives optical fiber (4), collimation lens (5), prism of corner cube (6) and spectrometer (7); The continuous spectrum that light source (1) sends is coupled to launching fiber (3) incident end through optical fiber coupled lens (2), after the exit end of launching fiber (3) penetrates, parallel ejaculation behind collimation lens (5) collimation, angle of arrival cone prism (6) back is reflected along former direction, after same collimation lens (5) focuses on, enter once more and receive optical fiber (4), after receive and send into spectrometer (7) after optical fiber (4) exit end penetrates, carry out spectral detection by spectrometer (7).Wherein collimation lens (5) and prism of corner cube (6) are formed flue gas probe.
2. according to claim 1ly transmit and receive the flue gas automonitor of signal, it is characterized in that, adopt launching fiber and receive optical fiber to replace optical lens and catoptron based on optical fiber.
3. according to claim 1 and 2ly transmit and receive the flue gas automonitor of signal, it is characterized in that described light source, flue gas probe, spectrometer are absolute construction, by launching fiber with receive optical fiber and carry out the signal transmission based on optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101341283A CN102297841A (en) | 2011-05-23 | 2011-05-23 | Flue gas automatic monitor based on optical fiber transmission and signal receiving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101341283A CN102297841A (en) | 2011-05-23 | 2011-05-23 | Flue gas automatic monitor based on optical fiber transmission and signal receiving |
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| CN102297841A true CN102297841A (en) | 2011-12-28 |
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| CN2011101341283A Pending CN102297841A (en) | 2011-05-23 | 2011-05-23 | Flue gas automatic monitor based on optical fiber transmission and signal receiving |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411907A (en) * | 2013-08-27 | 2013-11-27 | 西南大学 | Super-shallow detecting spectrum probe |
| CN103604757A (en) * | 2013-11-21 | 2014-02-26 | 中国科学院西安光学精密机械研究所 | Spectroscopy-based online inorganic matter dust component measurement system |
| CN104062251A (en) * | 2014-07-11 | 2014-09-24 | 刘颖东 | Optical fiber transmission type long-optical length laser gas sensor adopting space reflection structure |
| CN110426349A (en) * | 2019-08-30 | 2019-11-08 | 青岛众瑞智能仪器有限公司 | A kind of method and its gas chamber, measuring instrument improving flue gas analyzer stability |
| EP3715830A1 (en) * | 2019-03-26 | 2020-09-30 | Eaton Intelligent Power Limited | System for detection of particles in fluids |
| CN113720805A (en) * | 2021-08-13 | 2021-11-30 | 中国科学院上海技术物理研究所 | Method for detecting radiation transmittance of dust and stain on lens of outfield photoelectric detection system |
Citations (3)
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| CN1409115A (en) * | 2001-09-29 | 2003-04-09 | 上海理工大学 | Monitor for smoke dust and smoke exhaust |
| CN101231241A (en) * | 2008-02-20 | 2008-07-30 | 中南民族大学 | Device and method for real time on-line detecting flue gas pollutant |
| CN101251478A (en) * | 2008-03-28 | 2008-08-27 | 天津大学 | Ultraviolet difference flue gas probe based on dual-light-path |
-
2011
- 2011-05-23 CN CN2011101341283A patent/CN102297841A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1409115A (en) * | 2001-09-29 | 2003-04-09 | 上海理工大学 | Monitor for smoke dust and smoke exhaust |
| CN101231241A (en) * | 2008-02-20 | 2008-07-30 | 中南民族大学 | Device and method for real time on-line detecting flue gas pollutant |
| CN101251478A (en) * | 2008-03-28 | 2008-08-27 | 天津大学 | Ultraviolet difference flue gas probe based on dual-light-path |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411907A (en) * | 2013-08-27 | 2013-11-27 | 西南大学 | Super-shallow detecting spectrum probe |
| CN103604757A (en) * | 2013-11-21 | 2014-02-26 | 中国科学院西安光学精密机械研究所 | Spectroscopy-based online inorganic matter dust component measurement system |
| CN104062251A (en) * | 2014-07-11 | 2014-09-24 | 刘颖东 | Optical fiber transmission type long-optical length laser gas sensor adopting space reflection structure |
| CN104062251B (en) * | 2014-07-11 | 2018-06-26 | 刘颖东 | A kind of optical fibre transmission type long light path laser gas sensor using space reflection structure |
| EP3715830A1 (en) * | 2019-03-26 | 2020-09-30 | Eaton Intelligent Power Limited | System for detection of particles in fluids |
| CN110426349A (en) * | 2019-08-30 | 2019-11-08 | 青岛众瑞智能仪器有限公司 | A kind of method and its gas chamber, measuring instrument improving flue gas analyzer stability |
| CN110426349B (en) * | 2019-08-30 | 2023-05-30 | 青岛众瑞智能仪器股份有限公司 | Method for improving stability of flue gas analyzer, gas chamber and measuring instrument thereof |
| CN113720805A (en) * | 2021-08-13 | 2021-11-30 | 中国科学院上海技术物理研究所 | Method for detecting radiation transmittance of dust and stain on lens of outfield photoelectric detection system |
| CN113720805B (en) * | 2021-08-13 | 2024-06-18 | 中国科学院上海技术物理研究所 | Method for detecting dust and dirt radiation transmittance of lens of external field photoelectric detection system |
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| C06 | Publication | ||
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| ASS | Succession or assignment of patent right |
Owner name: HEBEI UNIVERSITY OF TECHNOLOGY Effective date: 20111115 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20111115 Address after: 300457, No. 41, No. fifth, Avenue, Binhai New Area Development Zone, Tianjin, No. five, No. 5 Applicant after: Tianjin Tongyang Science &Technology Development Co., Ltd. Co-applicant after: Hebei University of Technology Address before: 300457, No. 41, No. fifth, Avenue, Binhai New Area Development Zone, Tianjin, No. five, No. 5 Applicant before: Tianjin Tongyang Science &Technology Development Co., Ltd. |
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Application publication date: 20111228 |