CN104089702A - Light source system and gas analyzer - Google Patents
Light source system and gas analyzer Download PDFInfo
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- CN104089702A CN104089702A CN201310698655.6A CN201310698655A CN104089702A CN 104089702 A CN104089702 A CN 104089702A CN 201310698655 A CN201310698655 A CN 201310698655A CN 104089702 A CN104089702 A CN 104089702A
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- light
- dazzling screen
- deuterium lamp
- source system
- convex lens
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Abstract
The invention discloses a gas analyzer and a light source system. The light source system includes a mounting rack, and a deuterium lamp, a lens and an installation assembly of the lens, a shielding film and a driving motor, which are installed on the mounting rack. The lens and the installation assembly of the lens are arranged on a light path of the deuterium lamp. The driving motor is used for driving the shielding film to rotate. The shielding film is arranged between the deuterium lamp and the lens so as to enable light emitted by the deuterium lamp to discontinuously illuminate a gas chamber provided with the lens. Because the shading film and the driving motor are arranged, during a rotation process of the shading film, the light emitted by the deuterium lamp discontinuously passes through the gas chamber and when the shading film blocks the light path, a photoelectric detector of a gas chamber light exit of the gas analyzer is capable of detecting a current dark background value. When the shading film does not block the light path, the light passes through the gas chamber and then the photoelectric detector is capable of detecting a spectral value. Because the dark background value and the spectral value are both detected in a real-time manner, a real light intensity can be obtained through specific calculation.
Description
Technical field
The present invention relates to flue gas inspection field, relate in particular to a kind of light-source system and gas analyzer.
Background technology
In existing spectrochemical analysis for gases technology, great majority adopt continuous spectrum light source, as deuterium lamp, mercury lamp and part infrared light supply etc.In analytic process, real-time, the Stability and veracity of the spectral signal intensity of light source is the determinative of spectral analysis result reliability.And the collection of light signal strength is all to be undertaken by photodetector substantially.For photodetector, owing to being subject to the impact of the factors such as environment temperature, circuit design and serviceable life, make it unglazed in the situation that, can detect certain light intensity value, i.e. dark background.And corresponding fluctuation can appear along with the variation of above-mentioned factor in this value, thereby make the actual light intensity detecting occur certain fluctuation.Therefore,, in order to obtain more accurately actual light intensity, need to dark background be gathered and be deducted.
The mode that existing gas analyzer gathers dark background has following two kinds conventionally: the first, when analyser dispatches from the factory, gather several dark backgrounds, then obtain its mean value, be written in the dark background of algorithm, dark background during as whole system inverting concentration, it is all identical making whole system dark background at any time.This mode has joined fixing dark background value in the changing value of light source actual strength, and making the intensity of light source value detecting is not real light intensity value, makes the result can not accurate response actual concentrations value.The second, the front end increase circulation light-shading apparatus at photodetector, obtains current dark background value by controlling the switching of light-shading apparatus.The method due at photodetector between light source, also exist some to affect the factor that dark background actual value is surveyed in photodetection, thereby the dark background value of the reflection whole system that the dark background that detects of the method can not be strictly according to the facts.
Therefore,, in spectral analysis, the true dark background value that how Real-time Obtaining dark background value, and the dark background value gathering is whole system is that those skilled in the art are badly in need of the technical matters solving.
Summary of the invention
In order to solve the technical matters existing in background technology, the present invention proposes a kind of light-source system, can not only Real-time Obtaining dark background value, the true dark background value that the dark background value that also makes this collection is whole system.In addition, the invention allows for a kind of gas analyzer that this light-source system is installed.
On the one hand, the present invention proposes a kind of light-source system, for spectral analysis, comprises erecting frame and is arranged on deuterium lamp, convex lens and the installation component thereof on described erecting frame, and convex lens and installation component thereof are arranged on the light path of deuterium lamp; This light-source system also comprises anti-dazzling screen and drive motor, and described drive motor is used for driving anti-dazzling screen to rotate; Described anti-dazzling screen is arranged between deuterium lamp and convex lens, for the light interrupted illuminating convex lens that allow described deuterium lamp send.
Further, on described anti-dazzling screen, have transmission region, described drive motor is connected with anti-dazzling screen by rotating shaft, and described transmission region is the open close light of crossing deuterium lamp in the middle of anti-dazzling screen rotation process.
Further, described anti-dazzling screen is rectangle, and the anti-dazzling screen of described rectangle is in rotation process, and the light path of blocking between deuterium lamp and convex lens can be interrupted in its long limit.
Further, described light-source system also comprises connecting cylinder, and described connecting cylinder is between convex lens and anti-dazzling screen, and one end of connecting cylinder and installation component are socketed, and anti-dazzling screen is fitted in the end face of the other end of connecting cylinder rotationally.
Further, described connecting cylinder is conically shaped, and the little one end of xsect is towards deuterium lamp, one end socket installation component that xsect is large.
Further, described drive motor and anti-dazzling screen integrated installation are on described erecting frame, and a side of anti-dazzling screen is installed and be all arranged on to described drive motor and deuterium lamp vicinity, and described convex lens and installation component thereof are arranged on the opposite side of anti-dazzling screen.
Further, described light-source system also comprises the limit switch being fixed on described erecting frame, and described limit switch is provided with guide groove, and the rotational trajectory of described anti-dazzling screen is by described guide groove.
On the other hand, the present invention also proposes a kind of gas analyzer, comprises above-mentioned any one light-source system.
A kind of light-source system that the present invention proposes, comprise erecting frame and be arranged on deuterium lamp, convex lens and installation component thereof, anti-dazzling screen and the drive motor on described erecting frame, convex lens and installation component thereof are arranged on the light path of deuterium lamp, drive motor is used for driving anti-dazzling screen to rotate, anti-dazzling screen is arranged between deuterium lamp and convex lens, for the light interrupted illuminating convex lens that allow deuterium lamp send.Setting due to anti-dazzling screen and drive motor, in the rotary course of anti-dazzling screen, the light that deuterium lamp sends is interrupted through convex lens, when anti-dazzling screen blocks light path, the photodetector at the air chamber light-emitting window place of gas analyzer can detect signal value now, it is dark background value, when anti-dazzling screen does not block light path, light is through convex lens, now photodetector can detect another signal value, it is spectral value, because the spectral value of dark background value and above-mentioned detection is all to detect in real time, therefore through certain calculating, just can obtain real light intensity.
In further technical scheme, between anti-dazzling screen and the installation component of convex lens, add connecting cylinder, can allow anti-dazzling screen in rotary course, the impact that the light that as far as possible reduces deuterium lamp when blocking light path detects dark background, makes the dark background that detects more true.
In further technical scheme, connecting cylinder be shaped as taper shape, can better guarantee like this effect that is in the light of anti-dazzling screen, further increased the authenticity that dark background detects.
In further technical scheme, because drive motor and anti-dazzling screen also integrated installation, on erecting frame, make the smaller volume of whole light-source system, structure is more compact, has reduced to take up room.
Accompanying drawing explanation
Fig. 1 is the light path principle figure of a kind of light-source system of specific embodiment of the invention proposition.
Embodiment
As shown in Figure 1, the specific embodiment of the invention provides a kind of light-source system, for spectral analysis, comprise erecting frame and integrated installation deuterium lamp 1, convex lens 2 and installation component thereof, anti-dazzling screen 3 and the drive motor 4 on erecting frame, convex lens 2 and installation component thereof are arranged on the light path of deuterium lamp 1; Drive motor 4 and the contiguous side of installing and being all arranged on anti-dazzling screen 3 of deuterium lamp 1, convex lens 2 and installation component thereof are arranged on the opposite side of anti-dazzling screen 3, and drive motor 4 is for driving anti-dazzling screen 3 to rotate; Anti-dazzling screen 3 is arranged between deuterium lamp 1 and convex lens 2, for the light interrupted illuminating convex lens 2 that allow deuterium lamp 1 send.Particularly, anti-dazzling screen 3 can have multiple, and for example: on anti-dazzling screen 3, have transmission region, drive motor 4 is connected with anti-dazzling screen 3 by rotating shaft, transmission region is the open close light path of crossing deuterium lamp 1 in the middle of anti-dazzling screen 3 rotation processes; Or anti-dazzling screen 3 is rectangle, the anti-dazzling screen 3 of rectangle is in rotation process, and the light path of blocking between deuterium lamp 1 and convex lens 2 can be interrupted in its long limit.It should be noted that, the shape of anti-dazzling screen 3 can also be other shape, as long as in the process of rotating at anti-dazzling screen 3, the luminous energy that deuterium lamp 1 sends is interrupted through anti-dazzling screen 3 just.
Compared with prior art, setting due to anti-dazzling screen 3 and drive motor 4, in the rotary course of anti-dazzling screen 3, the light that deuterium lamp 1 sends is interrupted through convex lens 2, when anti-dazzling screen 3 blocks light path, the photodetector of the air chamber light-emitting window of gas analyzer can detect dark background value now, when anti-dazzling screen 3 does not block light path, light is through convex lens 2, now photodetector can detect light intensity, because the light intensity of dark background value and above-mentioned detection is all to detect in real time, therefore the calculating of process predetermined way, just can obtain real light intensity, in addition, because drive motor 4 and anti-dazzling screen 3 also integrated installation, on erecting frame, make the smaller volume of whole light-source system, structure is more compact, has reduced to take up room.
Preferably, light-source system also comprises connecting cylinder 6, and connecting cylinder 6 is between convex lens 2 and anti-dazzling screen 3, and one end of connecting cylinder 6 and installation component are socketed, and anti-dazzling screen 3 is fitted in the end face of the other end of connecting cylinder 6 rotationally.Particularly, connecting cylinder 6 is conically shaped, and the little one end of xsect is towards deuterium lamp 1, one end socket installation component that xsect is large.Like this, the light inlet place of the adjacent connecting cylinder 6 of anti-dazzling screen 3, connecting cylinder 6 is open circles taper, guaranteeing that the luminous energy of dispersing at a certain angle all enters into lens face, the extraneous parasitic light of avoiding of maximum possible enters into light path, and have influence on the measurement of dark background, thereby guaranteed the authenticity that dark background detects.
In addition, this light-source system also comprises the limit switch 5 being fixed on erecting frame, and limit switch 5 is provided with guide groove, and the rotational trajectory of anti-dazzling screen 3 passes through guide groove.Limit switch 5 can judge and anti-dazzling screen 3 is positioned to judgement the collection point of dark background.
In addition, the specific embodiment of the invention also provides a kind of gas analyzer, above-mentioned any one light-source system and photodetector are installed, photodetector is arranged on the light-emitting window of air chamber, therefore the photodetector of this gas analyzer can not only Real-time Obtaining dark background value, the true dark background value that the dark background value that also makes this collection is whole system, thus make the testing result of gas analyzer more accurate.
The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; according to technical scheme of the present invention and inventive concept thereof, be equal to replacement or changed, within all should being encompassed in protection scope of the present invention.
Claims (8)
1. a light-source system, for spectral analysis, comprise erecting frame and be arranged on deuterium lamp (1), convex lens (2) and the installation component thereof on described erecting frame, convex lens (2) and installation component thereof are arranged in the light path of deuterium lamp (1), it is characterized in that, also comprise anti-dazzling screen (3) and drive motor (4), described drive motor (4) is for driving anti-dazzling screen (3) to rotate; Described anti-dazzling screen (3) is arranged between deuterium lamp (1) and convex lens (2), for the light interrupted illuminating convex lens (2) that allow described deuterium lamp (1) send.
2. light-source system according to claim 1, it is characterized in that, described anti-dazzling screen has transmission region on (3), described drive motor (4) is connected with anti-dazzling screen (3) by rotating shaft, and described transmission region is interrupted the light that sees through deuterium lamp (1) in anti-dazzling screen (3) rotation process.
3. light-source system according to claim 1, it is characterized in that, described anti-dazzling screen (3) is rectangle, and the anti-dazzling screen of described rectangle (3) is in rotation process, and the light path of blocking between deuterium lamp (1) and convex lens (2) can be interrupted in its long limit.
4. light-source system according to claim 1, it is characterized in that, also comprise connecting cylinder (6), described connecting cylinder (6) is positioned between convex lens (2) and anti-dazzling screen (3), one end of connecting cylinder (6) and installation component socket, anti-dazzling screen (3) is fitted in the end face of the other end of connecting cylinder (6) rotationally.
5. light-source system according to claim 4, is characterized in that, described connecting cylinder (6) is conically shaped, and the little one end of xsect is towards deuterium lamp (1), one end socket installation component that xsect is large.
6. according to the light-source system described in claim 1-5 any one, it is characterized in that, described drive motor (4) and anti-dazzling screen (3) integrated installation are on described erecting frame, described drive motor (4) and the contiguous side of installing and being all arranged on anti-dazzling screen (3) of deuterium lamp (1), described convex lens (2) and installation component thereof are arranged on the opposite side of anti-dazzling screen (3).
7. light-source system according to claim 6, is characterized in that, also comprises the limit switch (5) being fixed on described erecting frame, and described limit switch (5) is provided with guide groove, and the rotational trajectory of described anti-dazzling screen (3) is by described guide groove.
8. a gas analyzer, is characterized in that, comprises the light-source system described in claim 1-7 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310698655.6A CN104089702A (en) | 2013-12-18 | 2013-12-18 | Light source system and gas analyzer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310698655.6A CN104089702A (en) | 2013-12-18 | 2013-12-18 | Light source system and gas analyzer |
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| CN104089702A true CN104089702A (en) | 2014-10-08 |
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| CN201310698655.6A Pending CN104089702A (en) | 2013-12-18 | 2013-12-18 | Light source system and gas analyzer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458626A (en) * | 2014-12-05 | 2015-03-25 | 力合科技（湖南）股份有限公司 | Gas analyzer |
| CN108107666A (en) * | 2016-11-24 | 2018-06-01 | 北京比兴科技有限公司 | The method and system of the light source detection of camera imaging performance |
| CN109141634A (en) * | 2018-09-29 | 2019-01-04 | 中国科学院长春光学精密机械与物理研究所 | Infrared detector dark background value calculating method, device, equipment, system and medium |
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| US20090168064A1 (en) * | 2006-04-07 | 2009-07-02 | Emerson Process Management Gmbh & Co Ohg | Method and apparatus for measuring the optical absorption of samples |
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| CN103398987A (en) * | 2013-08-06 | 2013-11-20 | 中国科学院合肥物质科学研究院 | Dust haze component on-line monitoring device |
| CN203705051U (en) * | 2013-12-18 | 2014-07-09 | 力合科技（湖南）股份有限公司 | Light source system and gas analyzer |
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| US4878755A (en) * | 1986-03-29 | 1989-11-07 | Leybold Aktiengesellschaft | Process and device for measuring the optical properties of thin layers |
| JPH05332933A (en) * | 1992-05-28 | 1993-12-17 | Anima Kk | Portable co2 concentration measuring device |
| CN1166203A (en) * | 1995-09-01 | 1997-11-26 | 创新激光有限公司 | Ultra-sensitive detection of contaminants in gas via intracavity laser intracavite |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458626A (en) * | 2014-12-05 | 2015-03-25 | 力合科技（湖南）股份有限公司 | Gas analyzer |
| CN108107666A (en) * | 2016-11-24 | 2018-06-01 | 北京比兴科技有限公司 | The method and system of the light source detection of camera imaging performance |
| CN109141634A (en) * | 2018-09-29 | 2019-01-04 | 中国科学院长春光学精密机械与物理研究所 | Infrared detector dark background value calculating method, device, equipment, system and medium |
| CN109141634B (en) * | 2018-09-29 | 2021-04-02 | 中国科学院长春光学精密机械与物理研究所 | Method, device, equipment, system and medium for calculating dark background value of infrared detector |
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