CN202256150U - Intelligent light interference gas measuring device - Google Patents
Intelligent light interference gas measuring device Download PDFInfo
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- CN202256150U CN202256150U CN2011204152700U CN201120415270U CN202256150U CN 202256150 U CN202256150 U CN 202256150U CN 2011204152700 U CN2011204152700 U CN 2011204152700U CN 201120415270 U CN201120415270 U CN 201120415270U CN 202256150 U CN202256150 U CN 202256150U
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Abstract
The utility model provides an intelligent light interference gas measuring device. The Jamin light interference principle is utilized for design, a beam of light is divided into two beams of light rays through the effect of a plane beam splitter, then, one beam of light rays is divided into two parts by a diaphragm or a gas chamber partition, the two parts respectively generates interference with corresponding parts of the other beam of light rays, two groups of light interference stripes with the black middle and two colored sides are formed, the two groups of stripes are compared for further obtaining measurement results, and simultaneously, the real-time temperature pressure value of the measurement is introduced for correcting the measurement value. The intelligent light interference gas measuring device has the advantages that the structure component is compact, the product size is smaller, the influence of environment factors such as vibration, temperature, pressure and the like cannot be easily caused, i.e. the defects of measurement error and zero shift of the traditional equipment are overcome, in the use process, the reading is intuitive, the operation is simple, the measurement is more accurate, and the collection, the storage and the management of data are favorably realized.
Description
Technical field
The utility model relates to the instrument of employing optical measurement for its characteristic, particularly a kind of intelligent interference of light eudiometry device that has utilized interference of light principle.
Background technology
The 1950's, the interference of light methane analyzer of RIKEN CORPORATION's development was the most widely used a kind of interference of light methane analyzer of existing market; Its light path and physical construction adopt Jamin interference of light principle, directly observe the mode of optical system interference of light striped amount of movement measure methane concentration through negative lens with human eye.This interference of light methane analyzer in use reading relies on human eye, and error is big; In addition, this equipment only produces one group of interference light, although adopts the image sensing technology that it is handled, and also can't overcome zero point drift.
Publication number is CN2783317Y; Open day is the Chinese utility application file of 2006-5-24; Disclose a kind of interference of light and detected methane or carbon dioxide plant; Utilize the Jamin principle of interference, added Flame Image Process collection and processing unit, but in use receive such environmental effects easily and the situation of the serious distortion of data occurs detecting.
Publication number is CN101576489A, and open day is the Chinese invention patent application documents of 2009-11-11, discloses a kind of interference of light and has detected methane or carbon dioxide plant.This device has utilized the Michelson principle of interference, produces two groups of interference lights.In this device, needs produce a branch of directional light, injecting need precision machined cemented prism.Said light is very high to the requirement of parallel degree, otherwise is difficult to produce satisfactory interference fringe.The quality of the machining precision of said cemented prism directly can influence the appearance of interference fringe, also can influence the radical of interference fringe.Therefore in addition, in the use, coming unstuck of the microdisplacement of light source and/or cemented surface all can cause the great variety of interference fringe, and then influences the accuracy of measurement result, has that manufacturing cost is higher, the deficiency of poor stability.
Summary of the invention
The purpose of the utility model is the deficiency to prior art; A kind of intelligent interference of light eudiometry device is provided; Comprise be installed on the fixed head or housing in light source, air chamber, imageing sensor and some optical elements; Be positioned at said light source top, be the plane beam splitter of 45 ° of installations, light source is launched and the light beam that passes light slit resolves into light beam a and the light beam b that is parallel to each other.
45 ° of faces of the corresponding said plane beam splitter of the incident end of said air chamber, the inclined-plane of the refractive power right angle prism that its exit end corresponding angle is adjustable; Air chamber is separated into reference gas chamber I, reference gas chamber II by gas chamber clapboard I, gas chamber clapboard II, and the sampling air chamber that is communicated with sampling apparatus;
When said light beam a gets into air chamber, be divided into the light beam a1 and the light beam a2 that pass reference gas chamber I and sampling air chamber respectively; When said light beam a1 and light beam a2 pass air chamber for the first time, behind refractive power right angle prism difference reflected back reference gas chamber II and sampling air chamber, arrive said plane beam splitter again, be reflected to the o point at last.
After said light beam b passes through reference gas chamber I equally, reflect into reference gas chamber II by the refractive power right angle prism again, arrive o point and light beam a1 and light beam a2 then and interfere respectively.Said light beam b and light beam a1 and light beam a2 interfere the formed light beam in back respectively, are positive lens through focal length, pass through negative lens again, finally arrive imageing sensor.
The utility model is owing to said structure, and its advantage is: adopt Jamin interference of light principle design, a branch of light forms the two-beam line respectively through the effect of plane beam splitter; Wherein Ray Of Light is divided into two parts again; After passing air chamber, the counterpart with another bundle light produces interference separately, forms two groups of colored interference of light stripeds in middle black both sides; Two groups of stripeds can compare, further to obtain measurement result through imageing sensor.
The error that the utility model causes temperature, pressure and physical construction plays effective inhibition; Because adopt Jamin interference of light principle, used plane beam splitter is easy to processing.Further, said plane beam splitter cooperates with lens, to the requirement reduction of the parallel degree of light source incident ray.Further; The refractive power right angle prism is adjustable; Can adjust the quantity of interference fringe, overcome the shortcoming that the equipment that utilizes the Michelson principle of interference depends on accurate balsaming lens, gas temperature, pressure parameter when having introduced the measuring separately of reference gas chamber and sampling air chamber simultaneously; Follow-up can the correction measured value makes measured value more near actual value.
Description of drawings
The device of the utility model can further specify through the indefiniteness embodiment that accompanying drawing provides.
Fig. 1 is the cut-open view of the utility model;
Fig. 2 is the cut-open view of the air chamber of the utility model.
Among the figure: the 1-light source, the 2-light slit, 3-reflects right angle prism, 4-collimation lens, 5-lens, 6-light hurdle; The 7-plane beam splitter, 9.1-gas chamber clapboard I, 9.2-gas chamber clapboard II, 10-air chamber seal pad, 11-air chamber; 12-refractive power right angle prism, 13-imageing sensor, 14-negative lens, 15-reference gas chamber I, 17-reference gas chamber II; The 16-air chamber of sampling, a-light beam a, a1-light beam a1, a2-light beam a2, o-0 point.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further, only limits to following embodiment but should not be construed the above-mentioned subject area of the utility model.Under the situation that does not break away from the above-mentioned technological thought of the utility model, according to ordinary skill knowledge and customary means, make various replacements and change, all should be included in the utility model scope.
Referring to accompanying drawing: a kind of intelligent interference of light eudiometry device among the figure; Comprise be installed on the fixed head or housing in light source 1, air chamber 11, imageing sensor 13 and some optical elements; Be positioned at said light source 1 top, be the plane beam splitter 7 of 45 ° of installations, light source 1 is launched and the light beam that passes light slit 2 resolves into light beam a and the light beam b that is parallel to each other.
45 ° of faces of the corresponding said plane beam splitter 7 of the incident end of said air chamber 11, the inclined-plane of the refractive power right angle prism 12 that its exit end corresponding angle is adjustable; Air chamber 11 is separated into reference gas chamber I15, reference gas chamber II17 by gas chamber clapboard I9.1, gas chamber clapboard II9.2, and the sampling air chamber 16 that is communicated with sampling apparatus.
When said light beam a gets into air chamber 11, be divided into the light beam a1 and the light beam a2 that pass reference gas chamber I15 and sampling air chamber 16 respectively; When said light beam a1 and light beam a2 pass air chamber 11 for the first time, behind refractive power right angle prism 12 difference reflected back reference gas chamber II17 and sampling air chamber 16, arrive said plane beam splitter 7 again, be reflected to the o point at last.
After said light beam b passes through reference gas chamber I15 equally, advance reference gas chamber II17 by 12 reflections of refractive power right angle prism again, arrive o point and light beam a1 and light beam a2 then and interfere respectively.Said light beam b and light beam a1 and light beam a2 interfere the formed light beam in back respectively, are positive lens 5 through focal length, pass through negative lens 14 again, finally arrive imageing sensor 13.
When light beam a is decomposed into the two-beam line, can adopt dual mode.Promptly be arranged on and have the light hurdle that can light beam a be divided into light beam a1 and light beam a2 between said plane beam splitter 7 and the air chamber 11;
Or adopt gas chamber clapboard I9.1 that light beam a is divided into light beam a1 and light beam a2.
Be more preferably, said refractive power right angle prism 12 is installed on the support that can regulate pendulum angle.Through finely tuning said angle, regulate the radical of interference fringe.
Further, the geometric center of said light slit 2, corresponding with the center of light hurdle that matches 6 and collimation lens 4.With the light beam that guarantee to get into plane beam splitter 7 collimation more.
In an embodiment of the utility model, said o is along on the light path of light working direction, and being provided with the light hurdle 6 that matches is positive lens 5 with focal length, and said lens 5 are balsaming lens.The focusing of these lens 5 and the effect of color difference eliminating can be eliminated the uneven influence of light that light source 1 is sent.
More excellent mode is below said lens 5, to be equipped with and can light path to be reflected 90 ° reflection right angle prism 3.Said negative lens 14 receives with imageing sensor 13 that 3 reflections are light beams through the reflection right angle prisms, makes the compactedness of the device that the utility model is related.
In an embodiment, said reference gas chamber I15, sampling air chamber 16 and/or reference gas chamber II17 are equipped with temperature and pressure transmitter with the gas circuit place of connection, and the data that obtain through said device can be for further processing.
The embodiment of the utility model is owing to have said structure; When measuring; A branch of stable white light source is sent in lamp source 1, sees through light slit 2 and arrives plane beam splitter 7 through collimation lens 4 and light hurdle 6, is divided into two-beam by plane beam splitter 7 then; A branch of is reflected light a, and another restraints the transmitted light b that transmits for after the reflection of backside reflection film.Two-beam is through air chamber 11 time, and reflected light a is divided into two parts by light hurdle or gas chamber clapboard I9.1, i.e. reflected light a1, reflected light a2.Transmitted light b and reflected light a1 are through reference gas chamber I15, and a2 is through sampling air chamber 16.The above-mentioned light of respectively restrainting is done 360 ° of backs of turning back at refractive power right angle prism 12 and is turned back to plane beam splitter 7 along light path through air chamber 11, meets at the o point after refraction through plane beam splitter 7 and the reflection again and interferes.The light beam that comes out from the o point arrives negative lens 14 through lens 5 and reflection right angle prism 3.Imageing sensor 13 light-sensitive surfaces that are arranged on behind the negative lens 14 obtain interference fringe clearly.In said process, can finely tune refractive power right angle prism 12 to obtain to satisfy the interference fringe of measurement requirement radical.Because thereby gas refracting index changes the mobile variation that the change that will cause optical path difference causes striped in the sampling air chamber 16, gas concentration is big more, and the moving interference fringes amount is big more, and imageing sensor 14 can change into accessible electric signal output to picture signal.
Claims (8)
1. intelligent interference of light eudiometry device, comprise be installed on the fixed head or housing in light source (1), air chamber (11), imageing sensor (13) and some optical elements, it is characterized in that:
In the light path of said light source (1), be the plane beam splitter (7) of 45 ° of installations, light source (1) emission and the light beam that passes light slit (2) are divided into light beam a and the light beam b that is parallel to each other;
45 ° of faces of the corresponding said plane beam splitter of the incident end of said air chamber (11) (7), the side of the refractive power right angle prism (12) that its exit end corresponding angle is adjustable; The sampling air chamber (16) that air chamber (11) is separated into reference gas chamber I (15), reference gas chamber II (17) and is communicated with sampling apparatus by gas chamber clapboard I (9.1), gas chamber clapboard II (9.2);
It is preceding that said light beam a gets into air chamber (11), is divided into light beam a1 and light beam a2 and passes reference gas chamber I (15) and sampling air chamber (16) respectively; When said light beam a1 and light beam a2 pass air chamber (11) for the first time, behind refractive power right angle prism (12) difference reflected back reference gas chamber II (17) and sampling air chamber (16), arrive said plane beam splitter (7) again, be reflected to the o point of plane beam splitter (7) at last;
After said light beam b passes through reference gas chamber I (15) equally, advance reference gas chamber II (17) by refractive power right angle prism (12) reflection again, arrive o point and light beam a1 and light beam a2 then and interfere respectively;
Said light beam b and light beam a1 and light beam a2 interfere the formed light beam in back respectively, are positive lens (5) through focal length, pass through negative lens (14) again, finally arrive imageing sensor (13).
2. intelligent interference of light eudiometry device according to claim 1 is characterized in that: have the light hurdle that can light beam a be divided into light beam a1 and light beam a2 between said plane beam splitter (7) and the air chamber (11).
3. intelligent interference of light eudiometry device according to claim 1, it is characterized in that: said gas chamber clapboard I (9.1) is divided into light beam a1 and light beam a2 with light beam a.
4. intelligent interference of light eudiometry device according to claim 1, it is characterized in that: said refractive power right angle prism (12) is installed on the support that can regulate pendulum angle.
5. intelligent interference of light eudiometry device according to claim 1 is characterized in that: the geometric center of said light slit (2), and corresponding with the center of light hurdle (6) that matches and collimation lens (4).
6. intelligent interference of light eudiometry device according to claim 1 is characterized in that: said o point is along on the light path of light working direction, and being provided with the light hurdle (6) and the focal length that match is positive lens (5), and said lens (5) are balsaming lens.
7. intelligent interference of light eudiometry device according to claim 1; It is characterized in that: said lens (5) below is equipped with can reflect light path 90 ° reflection right angle prism (3), and said negative lens (14) and imageing sensor (13) receive through reflection right angle prism (3) beam reflected.
8. intelligent interference of light eudiometry device according to claim 1 is characterized in that: said reference gas chamber I (15), sampling air chamber (16) and/or reference gas chamber II (17) are equipped with temperature, pressure transducer with the gas circuit place of connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204152700U CN202256150U (en) | 2011-10-27 | 2011-10-27 | Intelligent light interference gas measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204152700U CN202256150U (en) | 2011-10-27 | 2011-10-27 | Intelligent light interference gas measuring device |
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| CN202256150U true CN202256150U (en) | 2012-05-30 |
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| CN2011204152700U Expired - Fee Related CN202256150U (en) | 2011-10-27 | 2011-10-27 | Intelligent light interference gas measuring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721667A (en) * | 2012-06-29 | 2012-10-10 | 中国科学院自动化研究所 | Optical interference type intelligent gas sensor |
| CN103196834A (en) * | 2013-04-10 | 2013-07-10 | 重庆一心仪器仪表有限公司 | Optical interference gas test optical path system and air pressure balance device |
| CN107345904A (en) * | 2017-08-25 | 2017-11-14 | 青岛众瑞智能仪器有限公司 | Method and device based on optical absorption and interferometry gas concentration |
-
2011
- 2011-10-27 CN CN2011204152700U patent/CN202256150U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721667A (en) * | 2012-06-29 | 2012-10-10 | 中国科学院自动化研究所 | Optical interference type intelligent gas sensor |
| CN102721667B (en) * | 2012-06-29 | 2014-07-16 | 中国科学院自动化研究所 | Optical interference type intelligent gas sensor |
| CN103196834A (en) * | 2013-04-10 | 2013-07-10 | 重庆一心仪器仪表有限公司 | Optical interference gas test optical path system and air pressure balance device |
| CN103196834B (en) * | 2013-04-10 | 2015-10-28 | 重庆一心仪器仪表有限公司 | With the interference of light gas detecting system of air-pressure balancing device |
| CN107345904A (en) * | 2017-08-25 | 2017-11-14 | 青岛众瑞智能仪器有限公司 | Method and device based on optical absorption and interferometry gas concentration |
| CN107345904B (en) * | 2017-08-25 | 2023-10-03 | 青岛众瑞智能仪器股份有限公司 | Method and device for detecting gas concentration based on optical absorption and interferometry |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160818 Address after: 400700, Feng Shi Road 290, Beibei District, Chongqing (University Science Park) Patentee after: Chongqing Tongbo Measurement & Control Instrument Co., Ltd. Address before: 401334 Chongqing Fenghuang town of Shapingba District Wufu village 11 Patentee before: Chongqing Yixin Instrument and Apparatus Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20181027 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |