CN104483282A - Self-calibration gas chamber and optical fiber gas sensor detection system - Google Patents
Self-calibration gas chamber and optical fiber gas sensor detection system Download PDFInfo
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- CN104483282A CN104483282A CN201410846934.7A CN201410846934A CN104483282A CN 104483282 A CN104483282 A CN 104483282A CN 201410846934 A CN201410846934 A CN 201410846934A CN 104483282 A CN104483282 A CN 104483282A
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Abstract
The invention relates to a self-calibration gas chamber and an optical fiber gas sensor detection system.The self-calibration gas chamber comprises a housing of a gas accommodation cavity, wherein the housing is internally provided with a collimator support seat for supporting optical fiber collimators in pairs simultaneously, and a collimator mounting structure for fixing and aligning of the two optical fiber collimators arranged in pairs is arranged on the collimator support seat. During manufacture, a good foundation can be provided for alignment of the optical fiber collimators in pairs so long as machining precision of the collimator mounting structure on the collimator support seat is ensured, the chamber is convenient to manufacture and assemble, relative positions of the two optical fiber collimators are easy to ensure, and the chamber is stable in performance and convenient to maintain.
Description
Technical field
The present invention relates to self calibration air chamber and fiber gas sensor detection system.
Background technology
Optical fiber gas sensing technology is a tool new technique with broad prospects for development, Fibre Optical Sensor has that energy consumption is little, transmission is far away, signal stabilization, not by features such as the interference of electromagnetic field, can work under high temperature, high pressure, low temperature, deep-etching rugged surroundings, there is the advantage that traditional sensing technology is incomparable, started at present to be applied in the fields such as industrial gasses monitoring, laboratory air detection and the monitoring of coal mining methane gas.Self calibration air chamber is the core component of fiber optic sensor system monitoring, and it is directly connected to accuracy and the reliability of system monitoring data.
Self calibration air chamber of the prior art as application number be 200710093038.8, Authorization Notice No. calibration gas chamber disclosed in the Chinese patent of CN 101441173 B, comprise the shell of metallic cylinder form, the both ends open of shell is respectively equipped with optical window and catoptron, the outer peripheral face that optical fiber collimator is arranged on shell on optical window is also provided with perforate, a pressure diaphragm capsule is welded in perforate, shell forms the gas held chamber of a sealing together with pressure diaphragm capsule, is full of the tested gas of normal pressure of 100% as calibrating gas in gas held chamber.When ambient pressure changes time, pressure diaphragm capsule can be out of shape to balance inner and outer air pressure, and tested gas atmosphere keeps balance with gas container to be measured all the time to make the air pressure inside of calibration gas chamber.During use, light is incident from optical window through optical fiber collimator, is reflected, again through calibrating gas, then exported by optical window after calibrating gas by catoptron.Self calibration air chamber in above-mentioned gas sensor detecting system adopts reflected light path, in order to ensure that light path is accurate, manufacturing accuracy requires very high, require also higher to environment for use, and easily damage, not easy care, manufacture, use cost be high, simultaneously, optical window easily produces pipeline interferes, and affects the accuracy of testing result.
Summary of the invention
The object of this invention is to provide a kind of self calibration air chamber being easy to manufacture and safeguard, meanwhile, present invention also offers a kind of fiber gas sensor system using this self calibration air chamber.
The technical scheme that in the present invention, self calibration air chamber adopts is: self calibration air chamber, comprise the housing being provided with gas held chamber, be provided with the collimating apparatus supporting seat for supporting to the optical fiber collimator arranged simultaneously in described housing, described collimating apparatus supporting seat is provided with to be fixed and the collimating apparatus mounting structure mutually aligned respectively for two optical fiber collimators arranged in pairs.
Described housing is cylindrical shell, and drum shaft is provided with end cap to the opening part at two ends, and described collimating apparatus supporting seat overhangs and is fixed therein on an end cap.
The described end cap being fixed with collimating apparatus supporting seat is provided with support platform, and the corresponding end of described collimating apparatus supporting seat is fixed in described support platform.
Described collimating apparatus mounting structure is V-arrangement supporting surface, is provided with groove described in two between V-arrangement supporting surface.
The outer peripheral face of described housing is provided with inlet suction port that supplied gas enters and the air outlet adapter that supplied gas is discharged.
The lateral surface of end cap described in two is respectively equipped with counterbore, and the diapire of described counterbore is provided with the optical fiber perforation of passing for optical fiber, and corresponding optical fiber is through described optical fiber perforation and by being poured in the glue sealing in counterbore.
The technical scheme that in the present invention, fiber gas sensor detection system adopts is: fiber gas sensor detection system, comprise self calibration air chamber, described self calibration air chamber comprises the housing being provided with gas held chamber, be provided with the collimating apparatus supporting seat for supporting to the optical fiber collimator arranged simultaneously in described housing, described collimating apparatus supporting seat is provided with to be fixed and the collimating apparatus mounting structure mutually aligned respectively for two optical fiber collimators arranged in pairs.
Described housing is cylindrical shell, and drum shaft is provided with end cap to the opening part at two ends, and described collimating apparatus supporting seat overhangs and is fixed therein on an end cap.
Described collimating apparatus mounting structure is V-arrangement supporting surface, is provided with groove described in two between V-arrangement supporting surface.
The outer peripheral face of described housing is provided with inlet suction port that supplied gas enters and the air outlet adapter that supplied gas is discharged.
The present invention adopts technique scheme, self calibration air chamber comprises the housing being provided with gas held chamber, the collimating apparatus supporting seat for supporting to the optical fiber collimator arranged simultaneously is provided with in described housing, described collimating apparatus supporting seat is provided with for two optical fiber collimators arranged the in pairs fixing collimating apparatus mounting structure also mutually aligned respectively, during manufacture, as long as ensure that namely the machining precision of collimating apparatus mounting structure on collimation device supporting seat can be aligning of paired optical fiber collimator and provide good basis, be convenient to manufacture, assembling, and two optical fiber collimators are arranged on collimating apparatus supporting seat and easily ensure relative position simultaneously, also be convenient to safeguard.
Accompanying drawing explanation
Fig. 1 is the stereographic map of an embodiment of self calibration air chamber in the present invention;
Fig. 2 is the front view of self calibration air chamber in Fig. 1;
Fig. 3 is the cut-open view of Fig. 2.
The name that in figure, each Reference numeral is corresponding is called: 1-housing, and 2-fixes end cap, 3-end cover, 4-O shape O-ring seal, 5-inlet suction port, 6-air outlet adapter, 7-support platform, 8-collimating apparatus supporting seat, 9-optical fiber, 10-optical fiber collimator, 11-V shape groove, 12-groove, 13-screw, 14-counterbore, the spin-ended draw-in groove of 15-.
Embodiment
In the present invention, an embodiment of self calibration air chamber is as shown in Fig. 1 ~ Fig. 3, comprise the housing 1 of tubular, be separately positioned on fixing end cap 2 and the end cover 3 of the opening part at the axial two ends of housing 1, the outer peripheral face of housing 1 is provided with spaced apart inlet suction port 5 and air outlet adapter 6, is provided with the collimating apparatus supporting seat 8 for supporting to the optical fiber collimator 10 arranged simultaneously in housing 1.
The two ends of housing 1 are respectively equipped with internal thread, fixing end cap 2 and end cover 3 are equipped with external thread and are contained on housing 1 by external thread rotary.For ensureing sealing effectiveness, fixing end cap 2 and between end cover 3 with housing 1, being respectively equipped with corresponding O-ring seals 4.For the ease of the installation of fixing end cap 2 and end cover 3, the outer peripheral face in the middle part of housing 1 is provided with the spin-ended draw-in groove 15 that bottom surface is plane, and corresponding instrument easy to use carries out clamping.
The two ends of collimating apparatus supporting seat 8 are provided with V-shaped groove 11, form V-arrangement supporting surface, and the cell wall that corresponding optical fiber collimator 10 can be supported on V-shaped groove 11 realizes location, and V-shaped groove 11 forms collimating apparatus mounting structure.Adopt V-shaped groove 11 pairs of optical fiber collimators 10 to carry out support and can realize automatic centering, improve installation accuracy.Distance between the end face of two optical fiber collimators 10 is gas absorption light path L, can adjust according to service condition when mounted.Be provided with groove 12 between two V-arrangement supporting surfaces, can avoid impacting light path, and can overall weight be alleviated.The inner of fixing end cap 2 is provided with support platform 7, support platform 7 is provided with threaded hole, the corresponding end of collimating apparatus supporting seat 8 is fixed in support platform 7 by four screws 13, and after in fixing end cap 2 spinning to housing 1, collimating apparatus supporting seat 8 can overhang and be arranged in housing 1.
The lateral surface of fixing end cap 2 and end cover 3 is respectively equipped with counterbore 14, the diapire of counterbore 14 is provided with the optical fiber perforation of passing for optical fiber 9, the optical fiber 9 be connected on two optical fiber collimators 10 is drawn through described optical fiber perforation, and realize sealing by the glue be poured in counterbore 14, good sealing effect, is easy to realize.
The position that inlet suction port 5 and air outlet adapter 6 correspond between two V-shaped grooves is arranged, and for forming gas detect passage, inlet suction port 5 and air outlet adapter 6 is sealed after gas collecting, gas is kept in gas held chamber.
The design concept of above-mentioned self calibration air chamber is as follows: LASER Light Source converge laggard enter optical fiber 9, gas held chamber is entered by optical fiber 9 and optical fiber collimator 10 transmission, light through gas held chamber time through tested gas absorption, transmitted by optical fiber 9 after spreading out of and analyze, by sensor, light signal is converted to electric signal.According to Beer-Lambert law, extrapolate gas-monitoring concentration by absorbance and following formula:
Io=Ii e
-LCK
In formula: Ii is input light intensity; Io is output intensity; C is gas concentration; L represents that optical radiation is through absorbing the distance of gas; K represents absorption coefficient to be measured; LCK is absorbance.
During use, first respectively the normal concentration gas of different component is demarcated, determine each component gas absorption coefficient K in systems in which, then equal each component absorbance sum according to total absorbance, thus the analysis realized gas concentration and monitoring.
Above-mentioned housing 1, fixing end cap 2, end cover 3, inlet suction port 5, air outlet adapter 6 and collimating apparatus supporting seat 8 all adopt high-quality 304 stainless steel to make, and surface is through corrosion-resistant Passivation Treatment, can adapt to severe environment for use.Further, collimating apparatus supporting seat 8 adopts removable structure, manufacture, easy to maintenance, with low cost, two optical fiber collimators 10 are all fixed on collimating apparatus supporting seat 8 and realize aligning, stable performance, reliable, effectively can improve accuracy and the stability of optical fiber sensing system.Even if the embodiment fiber gas sensor detection system of above-mentioned self calibration air chamber of fiber gas sensor detection system, repeats no more in the present invention herein.
In the above-described embodiments, the removable setting of collimating apparatus supporting seat 8, and be fixed on the fixing end cap 2 of housing 1, and the collimating apparatus mounting structure on collimating apparatus supporting seat 8 is V-arrangement supporting surface.In other embodiments of the invention, collimating apparatus supporting seat 8 also can be fixedly installed, such as, be fixedly installed on corresponding end cap or on the inwall of housing, the shape of housing 1 is also not limited to cylindrical shape, as long as can form gas held chamber.In addition, the collimating apparatus mounting structure on collimating apparatus supporting seat 8 also can be other forms, such as, for the Block Cartridge that optical fiber collimator 10 plug-in mounting is fixing.
Claims (10)
1. self calibration air chamber, comprise the housing being provided with gas held chamber, it is characterized in that: be provided with the collimating apparatus supporting seat for supporting to the optical fiber collimator arranged simultaneously in described housing, described collimating apparatus supporting seat is provided with to be fixed and the collimating apparatus mounting structure mutually aligned respectively for two optical fiber collimators arranged in pairs.
2. self calibration air chamber according to claim 1, is characterized in that: described housing is cylindrical shell, and drum shaft is provided with end cap to the opening part at two ends, and described collimating apparatus supporting seat overhangs and is fixed therein on an end cap.
3. self calibration air chamber according to claim 2, is characterized in that: the described end cap being fixed with collimating apparatus supporting seat is provided with support platform, and the corresponding end of described collimating apparatus supporting seat is fixed in described support platform.
4. the self calibration air chamber according to claim 1 or 2 or 3, is characterized in that: described collimating apparatus mounting structure is V-arrangement supporting surface, is provided with groove described in two between V-arrangement supporting surface.
5. the self calibration air chamber according to claim 1 or 2 or 3, is characterized in that: the outer peripheral face of described housing is provided with inlet suction port that supplied gas enters and the air outlet adapter that supplied gas is discharged.
6. the self calibration air chamber according to Claims 2 or 3, it is characterized in that: the lateral surface of end cap described in two is respectively equipped with counterbore, the diapire of described counterbore is provided with the optical fiber perforation of passing for optical fiber, and corresponding optical fiber is through described optical fiber perforation and by being poured in the glue sealing in counterbore.
7. fiber gas sensor detection system, comprise self calibration air chamber, described self calibration air chamber comprises the housing being provided with gas held chamber, it is characterized in that: be provided with the collimating apparatus supporting seat for supporting to the optical fiber collimator arranged simultaneously in described housing, described collimating apparatus supporting seat is provided with to be fixed and the collimating apparatus mounting structure mutually aligned respectively for two optical fiber collimators arranged in pairs.
8. fiber gas sensor detection system according to claim 7, is characterized in that: described housing is cylindrical shell, and drum shaft is provided with end cap to the opening part at two ends, and described collimating apparatus supporting seat overhangs and is fixed therein on an end cap.
9. the fiber gas sensor detection system according to claim 7 or 8, is characterized in that: described collimating apparatus mounting structure is V-arrangement supporting surface, is provided with groove described in two between V-arrangement supporting surface.
10. the fiber gas sensor detection system according to claim 7 or 8, is characterized in that: the outer peripheral face of described housing is provided with inlet suction port that supplied gas enters and the air outlet adapter that supplied gas is discharged.
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| CN201410846934.7A CN104483282B (en) | 2014-12-31 | 2014-12-31 | Self-calibration gas chamber and optical fiber gas sensor detection system |
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| CN201410846934.7A CN104483282B (en) | 2014-12-31 | 2014-12-31 | Self-calibration gas chamber and optical fiber gas sensor detection system |
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| CN104483282B CN104483282B (en) | 2020-04-17 |
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| CN105548074A (en) * | 2015-12-31 | 2016-05-04 | 郑州光力科技股份有限公司 | Self-calibrating gas chamber and detecting system for gas sensor using self-calibrating gas chamber |
| CN106645572A (en) * | 2016-12-12 | 2017-05-10 | 歌尔股份有限公司 | Gas sensor testing device and testing method |
| CN107238580A (en) * | 2017-06-06 | 2017-10-10 | 中煤科工集团重庆研究院有限公司 | Self-calibration gas chamber and distributed optical fiber methane sensing system |
| CN109085138A (en) * | 2018-09-20 | 2018-12-25 | 哈尔滨工业大学 | A kind of distributed gas sensing device and method based on CW with frequency modulation |
| CN109211786A (en) * | 2018-08-31 | 2019-01-15 | 中煤科工集团重庆研究院有限公司 | Correlation type spectrum gas absorption cell |
| CN109540940A (en) * | 2018-12-06 | 2019-03-29 | 中国兵器工业第五九研究所 | A kind of short wave length X-ray diffraction instrument and equipment and its collimator quick replacement device |
| CN109883963A (en) * | 2019-03-07 | 2019-06-14 | 中国矿业大学 | A kind of calibrating installation of gas telemeter |
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| CN107238580A (en) * | 2017-06-06 | 2017-10-10 | 中煤科工集团重庆研究院有限公司 | Self-calibration gas chamber and distributed optical fiber methane sensing system |
| CN109211786A (en) * | 2018-08-31 | 2019-01-15 | 中煤科工集团重庆研究院有限公司 | Correlation type spectrum gas absorption cell |
| CN109085138A (en) * | 2018-09-20 | 2018-12-25 | 哈尔滨工业大学 | A kind of distributed gas sensing device and method based on CW with frequency modulation |
| CN109085138B (en) * | 2018-09-20 | 2024-02-13 | 哈尔滨工业大学 | Distributed gas sensing device and method based on frequency modulation continuous wave |
| CN109540940A (en) * | 2018-12-06 | 2019-03-29 | 中国兵器工业第五九研究所 | A kind of short wave length X-ray diffraction instrument and equipment and its collimator quick replacement device |
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