CN103969190A - Automatic calibration device for laser type extinction smoke meter - Google Patents
Automatic calibration device for laser type extinction smoke meter Download PDFInfo
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- CN103969190A CN103969190A CN201410189422.8A CN201410189422A CN103969190A CN 103969190 A CN103969190 A CN 103969190A CN 201410189422 A CN201410189422 A CN 201410189422A CN 103969190 A CN103969190 A CN 103969190A
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- motor
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- smokemeter
- pacity
- optical fiber
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Abstract
The invention provides an automatic calibration device for a laser type extinction smoke meter. The automatic calibration device mainly consists of a base (1), a support rod I (2), a support rod II (3), a plane mirror I (4), a plane mirror II (5), a cross rod (6), a motor I (7), a motor II (8), an extinction slide disc (9), an optical fiber passage (10), an optical fiber inlet joint (11), an optical fiber outlet joint (12) and a control unit (13), wherein the automatic calibration device is matched with the laser type extinction smoke meter consisting of a laser transmitter (14), a laser transmitter (15) and a detection chamber (16) for use; the plane mirror I (4) and the plane mirror II (5) are connected with the cross rod (6); the support rod I (2) and the support rod II (3) are connected with the cross rod (6) through top bearings; the motor I (7) and the motor II (8) are respectively connected with the cross rod (6) and the extinction slide disc (9). The problem of zero shift of the laser type extinction smoke meter can be solved in real time, so that the measurement accuracy is improved.
Description
Technical field
The invention belongs to environment measuring instrument technical field, be specifically related to a kind of self-checking device of laser type pacity smokemeter.
Background technology
At present, along with the increasingly stringent of Abgasgesetz, the restriction of diesel engine vent gas smoke intensity and measuring accuracy are required also to promote thereupon.The traditional extinction type smokemetor resolution detecting for diesel engine vent gas smoke intensity is 1/0.01m, being less than 1/0.lm with the smoke intensity value of tail gas under state 4 levels compares, its measuring error has surpassed 10%, and traditional extinction type smokemetor is usingd white light as detection light source, inconsistent because of different wave length scattering of light, diffraction, absorption characteristic, its precision and minimum resolution are greatly limited.The good laser of the monochromaticity of usining is as the extinction type smokemetor of light source, can increase substantially the measuring accuracy under low smoke intensity operating mode, but in long-term use procedure, because of residue gas and lasing light emitter senile cause in device, can make the measuring accuracy of laser type pacity smokemeter reduce.
Summary of the invention
The object of the invention is to provide a kind of self-checking device of laser type pacity smokemeter, in the situation that the zero point drift of laser type pacity smokemeter is larger, automatically enter align mode, by level crossing, Emission Lasers source is incorporated into delustring slide dish, the light that sees through the slide of different dullness is introduced in laser pickoff through optical fibre channel, by transmitting light intensity and the ratio Analysis of receiving light power under different dullness, real time correction laser type pacity smokemeter is because of sensing chamber's residue gas or the aging larger Zero drift in main amplifier causing of lasing light emitter, further improve the measuring accuracy of laser type pacity smokemeter.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of self-checking device of laser type pacity smokemeter is provided, mainly by base 1, pole I 2, pole II 3, level crossing I 4, level crossing II 5, cross bar 6, motor I 7, motor II 8, delustring slide dish 9, optical fibre channel 10, optical fiber inlet attack 11, optical fiber outlet connection 12, control module 13 forms, described self-checking device coordinates by generating laser 14, laser pickoff 15, the laser type pacity smokemeter that sensing chamber 16 forms is used, described level crossing I 4, level crossing II 5 is connected with cross bar 6, pole I 2, pole II 3 is connected with cross bar 6 by top bearing, described motor I 7, motor II 8 respectively with cross bar 6, delustring slide dish 9 connects, described optical fibre channel 10 two ends respectively with optical fiber inlet attack 11, optical fiber outlet connection 12 connects, described control module 13 and motor I 7, motor II 8, generating laser 14, laser pickoff 15 connects, described pole I 2, pole II 3 and laser type pacity smokemeter are fixed on base 1.
In a preferred embodiment of the present invention, after the signal that described control module 13 receives from generating laser 14, laser pickoff 15, judge under sensing chamber's smokeless state and whether have obvious zero point drift, if there is obvious zero point drift, control module 13 is controlled motor I 7,8 work of motor II, enters automatic calibration state.
In a preferred embodiment of the present invention, in automatic calibration process, described cross bar 6 is under the driving of motor I 7, can be in the bearing that is fixed on pole I 2, pole II 3 tops 90 ° of positive and negative rotations, the level crossing I 4 that drive is attached thereto, level crossing II 5 are rotated to vertical position from cross bar 6 surface levels, and the reflection by level crossing is delivered to laser pickoff 15 by the utilizing emitted light from generating laser 14 through optical fibre channel 10.
In a preferred embodiment of the present invention, the described delustring slide dish 9 some intervals of even decile, each interval different slide of dullness of settling, in calibration process, motor II 8 rotation under control module 13 is controlled, drives 9 rotations of delustring slide dish.
In a preferred embodiment of the present invention, described optical fiber inlet attack 11 should rationally be settled with optical fiber outlet connection 12, and guaranteeing can be vertically into and out of joint through light.
Beneficial effect of the present invention is: the self-checking device of a kind of laser type pacity smokemeter of the present invention, can be in the situation that the zero point drift of laser type pacity smokemeter be larger, automatically enter align mode, by transmitting light intensity and the ratio Analysis of receiving light power under different dullness, real time correction laser type pacity smokemeter, because of sensing chamber's residue gas or the aging larger Zero drift in main amplifier causing of lasing light emitter, further improves the measuring accuracy of laser type pacity smokemeter.
Accompanying drawing explanation
Fig. 1 is front view of the present invention
Fig. 2 is the front view of delustring slide dish
Mark in figure: 1, base, 2, pole I, 3, pole II, 4, level crossing I, 5, level crossing II, 6, cross bar, 7, motor I, 8, motor II, 9, delustring slide dish, 10, optical fibre channel, 11, optical fiber inlet attack, 12, optical fiber outlet connection, 13, control module, 14, generating laser, 15, laser pickoff, 16, sensing chamber.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Refer to Fig. 1 and Fig. 2, the embodiment of the present invention comprises:
A kind of self-checking device of laser type pacity smokemeter, mainly by base 1, pole I 2, pole II 3, level crossing I 4, level crossing II 5, cross bar 6, motor I 7, motor II 8, delustring slide dish 9, optical fibre channel 10, optical fiber inlet attack 11, optical fiber outlet connection 12, control module 13 forms, described self-checking device coordinates by generating laser 14, laser pickoff 15, the laser type pacity smokemeter that sensing chamber 16 forms is used, described level crossing I 4, level crossing II 5 is connected with cross bar 6, pole I 2, pole II 3 is connected with cross bar 6 by top bearing, described motor I 7, motor II 8 respectively with cross bar 6, delustring slide dish 9 connects, described optical fibre channel 10 two ends respectively with optical fiber inlet attack 11, optical fiber outlet connection 12 connects, described control module 13 and motor I 7, motor II 8, generating laser 14, laser pickoff 15 connects, described pole I 2, pole II 3 and laser type pacity smokemeter are fixed on base 1.
Under sensing chamber's smokeless state, after the signal that control module 13 receives from generating laser 14, laser pickoff 15, through internal algorithm, judge whether laser type pacity smokemeter exists obvious zero point drift, if there is obvious zero point drift, control module 13 is controlled motor I 7,8 work of motor II, and system enters automatic calibration state.
In automatic calibration process, cross bar 6 is under the driving of motor I 7, pole I 2 can be fixed on, in the bearing at pole II 3 tops just, 90 ° of despinings, the level crossing I 4 that drive is attached thereto, level crossing II 5 is rotated to vertical position from cross bar 6 surface levels, realizing the accurate location of level crossing gets involved, reflection by level crossing reaches delustring slide dish 9 by the utilizing emitted light from generating laser 14, motor II 8 drives 9 rotations of delustring slide dish under control module 13 is controlled, thereby realize utilizing emitted light and through the slide of different dullness, import optical fibre channel 10 into successively, finally after 5 reflections of level crossing II, by laser pickoff 15, accepted, control module 13 is analyzed from generating laser 14, the signal of laser pickoff 15, draw the ratio of launching light intensity and receiving light power under different dullness, for proofreading and correct the zero point drift of real system, provide reference.
When utilizing emitted light successively by delustring slide dish 9 on all slides after smoothly controlled unit receives, control module 13 is controlled 7 reversions of motor I, make level crossing get back to the surface level of cross bar 6, cut off the light transmission of calibration path, carry out normal smoke intensity testing process.In addition, optical fiber inlet attack 11 should rationally be settled with optical fiber outlet connection 12, guarantees can, vertically into and out of joint, guarantee the free of losses transmission of light in passage of light 10 through light.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes instructions of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. a self-checking device for laser type pacity smokemeter, mainly by base (1), pole I (2), pole II (3), level crossing I (4), level crossing II (5), cross bar (6), motor I (7), motor II (8), delustring slide dish (9), optical fibre channel (10), optical fiber inlet attack (11), optical fiber outlet connection (12), control module (13) forms, and it is characterized in that: described self-checking device coordinates by generating laser (14), laser pickoff (15), the laser type pacity smokemeter that sensing chamber (16) forms is used, described level crossing I (4), level crossing II (5) is connected with cross bar (6), pole I (2), II (3) is connected with cross bar (6) by top bearing, described motor I (7), motor II (8) respectively with cross bar (6), delustring slide dish (9) connects, described optical fibre channel (10) two ends respectively with optical fiber inlet attack (11), optical fiber outlet connection (12) connects, described control module (13) and motor I (7), motor II (8), generating laser (14), laser pickoff (15) connects, described pole I (2), pole II (3) and laser type pacity smokemeter are fixed on base (1).
2. the self-checking device of a kind of laser type pacity smokemeter according to claim 1, it is characterized in that: described control module (13) receives after the signal from generating laser (14), laser pickoff (15), judge under sensing chamber (16) smokeless state and whether have obvious zero point drift, if there is obvious zero point drift, control module (13) is controlled motor I (7), motor II (8) work, enters automatic calibration state.
3. the self-checking device of a kind of laser type pacity smokemeter according to claim 1, it is characterized in that: in automatic calibration process, described cross bar (6) is under the driving of motor I (7), can be in the bearing that is fixed on pole I (2), pole II (3) top 90 ° of positive and negative rotations, level crossing I (4), level crossing II (5) that drive is attached thereto are rotated to vertical position from cross bar surface level, and the reflection by level crossing is delivered to laser pickoff (15) by the utilizing emitted light from generating laser (14) through optical fibre channel (10).
4. the self-checking device of a kind of laser type pacity smokemeter according to claim 1, it is characterized in that: described delustring slide dish (9) is the some intervals of decile evenly, each interval different slide of dullness of settling, in calibration process, motor II (8) rotation under control module (13) is controlled, drive delustring slide dish (9) rotation, make utilizing emitted light import optical fibre channel (10) into through different dullness slides.
5. the self-checking device of a kind of laser type pacity smokemeter according to claim 1, is characterized in that: described optical fiber inlet attack (11) should rationally be settled with optical fiber outlet connection (12), and guaranteeing can be vertically into and out of joint through light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410189422.8A CN103969190B (en) | 2014-05-07 | 2014-05-07 | A kind of self-checking device of laser type pacity smokemeter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410189422.8A CN103969190B (en) | 2014-05-07 | 2014-05-07 | A kind of self-checking device of laser type pacity smokemeter |
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| CN103969190A true CN103969190A (en) | 2014-08-06 |
| CN103969190B CN103969190B (en) | 2016-05-18 |
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| CN201410189422.8A Expired - Fee Related CN103969190B (en) | 2014-05-07 | 2014-05-07 | A kind of self-checking device of laser type pacity smokemeter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961779A (en) * | 2019-12-24 | 2020-04-07 | 安徽省春谷3D打印智能装备产业技术研究院有限公司 | Cantilever type laser light path calibrating device |
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2014
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Patent Citations (8)
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| WO1982000717A1 (en) * | 1980-08-14 | 1982-03-04 | Panametrics | Method and apparatus for photometric detection in fluids |
| JPH02110347A (en) * | 1988-10-20 | 1990-04-23 | Teijin Ltd | Measuring method of adhering amount of oil to fiber |
| EP1621868A1 (en) * | 2004-07-30 | 2006-02-01 | ABB PATENT GmbH | Apparatus and method for calibration of the sensitivity of a photometer |
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| CN103403529A (en) * | 2010-12-23 | 2013-11-20 | Abb股份公司 | Optical gas analyser device having means for calibrating the frequency spectrum |
| CN202033268U (en) * | 2011-03-07 | 2011-11-09 | 杜永强 | On-line multipoint calibrating device of on-line continuous particulate concentration monitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961779A (en) * | 2019-12-24 | 2020-04-07 | 安徽省春谷3D打印智能装备产业技术研究院有限公司 | Cantilever type laser light path calibrating device |
| CN110961779B (en) * | 2019-12-24 | 2021-07-20 | 安徽省春谷3D打印智能装备产业技术研究院有限公司 | Cantilever type laser light path calibrating device |
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| CN103969190B (en) | 2016-05-18 |
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