CN102589696A - Infrared colorimetric emission spectrum chromatography method based on optical fiber bundle shunt sensing - Google Patents
Infrared colorimetric emission spectrum chromatography method based on optical fiber bundle shunt sensing Download PDFInfo
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- CN102589696A CN102589696A CN2012100533187A CN201210053318A CN102589696A CN 102589696 A CN102589696 A CN 102589696A CN 2012100533187 A CN2012100533187 A CN 2012100533187A CN 201210053318 A CN201210053318 A CN 201210053318A CN 102589696 A CN102589696 A CN 102589696A
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Abstract
An infrared colorimetric emission spectrum chromatography method based on optical fiber bundle shunt sensing is disclosed. According to the method, multi-group infrared optical fiber bundle plane arrays collect infrared dual-wavelength radiation information of a plurality of directions of a flow field to be measured. Each group of the optical fiber bundle plane array is formed by infrared fibers with a number of multiplying M by N (M rows and N columns). Each fiber is divided into two paths through a one-to-two infrared fiber splitter. The each path of the optical fiber is cascaded with an infrared photoelectric sensor through infrared narrowband filter pieces with different central wavelengths. Quantity and distribution of the fibers depend on spatial test resolution needed by the flow field to be measured. The method has the following advantages that: through acquisition of the optical fiber bundle and the infrared fiber splitter, dual-wavelength multi-section infrared radiation information of the flow field to be measured can be obtained under a condition of a same projection direction number; through combining dual-wavelength colorimetric temperature measurement and an emission spectrum chromatography algorithm, temperature distribution of the each section of the flow field to be measured can be reconstructed. By using single wavelength emission spectrum chromatography, the temperature distribution can be reconstructed after emissivity of the flow field to be measured is calibrated. By using the method of the invention, the above disadvantage can be effectively eliminated.
Description
Technical field
The present invention relates to a kind of three-dimensional temperature field method of testing, relate in particular to a kind of infrared colorimetric emission spectral chromatography method based on fibre bundle shunt sensing.
Background technology
The emission spectral chromatography method that forms in conjunction with radiometric temperature measurement and optical chromatography belongs to a branch of optical chromatography, adopts this method to carry out Non-Destructive Testing to having the three-dimensional physical quantity of extraradial target to be measured distributed.Can know by the Planck blackbody radiation law; Can draw the temperature of black matrix according to the radiant exitance of black matrix under a certain wavelength; But the temperature of actual object also has relation with the emissivity of object; Because the emissivity of object does not have general mathematical model, generally is difficult for on-line measurement, therefore can be because the emissivity problem be introduced bigger measuring error based on the reconstruction of temperature field of single wavelength emission spectrum chromatography.The dual wavelength color comparison temperature measurement can reduce emissivity to thermometric influence to a certain extent through the ratio (colorimetric) of radiant exitance under the dual wavelength, therefore can avoid the shortcoming of single wavelength emission spectrum chromatography method based on the reconstruction of temperature field of dual wavelength emission spectral chromatography.
Existing dual wavelength emission spectral chromatography method adopts imaging len, ratio spectroscope, narrow-cut filter, planar array detector spare to carry out raw data acquisition; Exist two significant disadvantages: therefore one of which exists the reconstruction error more much bigger than collimated beam chromatography because radiant rays is the pencil-beam formation method when tomographic inversion calculates; It is two owing to adopt the ratio spectroscope to carry out the shunt of radiation information; The angle coupling of two-way imaging optical axis, the angle and the location matches of planar array detector require very high after spectroscopical fixing, beam split; Very easily receive the influence of on-the-spot test environmental disturbances (for example vibratory impulse etc.), thereby cause bigger reconstruction error.
To above problem; The present invention proposes a kind of infrared colorimetric emission spectral chromatography method based on fibre bundle shunt sensing; Can obtain the collimated beam emission spectrum primary radiation data of multi-direction two kinds of different infrared wavelengths,, can rebuild the temperature field in conjunction with colorimetric tomographic reconstruction algorithm.
Summary of the invention
The object of the present invention is to provide a kind of infrared colorimetric emission spectral chromatography method based on fibre bundle shunt sensing; To solve the problem that exists in existing single wavelength and the dual wavelength emission spectral chromatography method for reconstructing, can carry out degree of precision and reach three-dimensional Temperature Distribution test than the flow field to be measured of high-reliability.
The present invention realizes like this; Gather the dual wavelength infrared radiation information of a plurality of directions in flow field to be measured through many groups infrared optical fiber bundle planar array; Every group of infrared optical fiber bundle planar array is made up of some infrared optical fibers; Every infrared optical fiber is divided into two-way by an one-to-two infrared optical fiber shunt again; Every road optical fiber so just can be similar to the radiation information that obtains two kinds of different infrared wavelengths on the same direction through different near infrared narrow band filter slice and the infrared photoelectric sensor cascades of centre wavelength, and the quantity of optical fiber depends on the test space resolution that flow field to be measured is required with distributing on each direction.The Temperature Distribution that can rebuild each cross section, flow field to be measured in conjunction with dual wavelength color comparison temperature measurement and emission spectral chromatography algorithm.
Advantage of the present invention is: can be under identical projecting direction number through fibre bundle collection and infrared optical fiber shunt; Obtain the dual wavelength multi-section infrared radiation information in flow field to be measured; In conjunction with the Temperature Distribution that dual wavelength color comparison temperature measurement and emission spectral chromatography algorithm can be rebuild each cross section, flow field to be measured, can effectively eliminate single wavelength emission spectrum chromatography and need treat flow measurement field emissivity earlier and demarcate the shortcoming that to rebuild Temperature Distribution.
Description of drawings
Fig. 1 is a schematic diagram of the present invention.
Flow field to be tested 2, spatial filter 3, infrared optical fiber bundle 4, one-to-two infrared optical fiber shunt 5, infrared electro sensing coupling mechanism 6, narrow band filter slice 7, infrared photoelectric detector 8, amplifying circuit and data collecting card 9, computing machine in the drawings, 1.
Embodiment
As shown in Figure 1, the present invention is achieved in that all there is infrared radiation in the 1 pair of external space all directions in flow field to be tested, and spatial filter 2 is for being covered with the flat board of even distribution circular hole, and the diameter of circular hole is identical with the diameter of infrared optical fiber, to satisfy the condition of installing and locating.Horizontal range Lx between circular hole in vertical range Ly by the bulk in flow field 1 to be tested and test required spatial discrimination and require decision.Spatial filter 2 is installed with infrared optical fiber bundle 3 and is connected, and forms infrared optical fiber bundle planar array.Every group of infrared optical fiber bundle planar array comprises that M multiply by N root infrared optical fiber, and wherein M is the quantity that each layer gone up optical fiber, and N is the number of plies.Through laying a plurality of infrared optical fiber planar arrays in different directions, can collect flow field 1 to be tested along multidirectional parallel radiation information.Every optical fiber of infrared optical fiber bundle planar array is divided into two-way through one-to-two infrared optical fiber shunt 4; Two-way optical fiber is process narrow band filter slice that centre wavelength is
6 and infrared photoelectric detector 7 cascades respectively; Be coupled through infrared electro sensing coupling mechanism 5, so just can obtain the radiation data of two kinds of different wave lengths
on the same direction.The infrared photoelectric sensor transducing signal is through amplifying circuit and data collecting card 8; Be converted into the voltage signal of corresponding wavelength
radiation information, deliver to computing machine 9 and carry out analyzing and processing.
By the photoelectric characteristic of infrared photoelectric detector 7, can obtain the relation of voltage signal and incident light illumination
Just can obtain spoke brightness by counter the pushing away of magnitude of voltage U in conjunction with the Computerized chromatographic algorithm
L(
X, y, z).Through optical fiber one-to-two shunt, we can obtain spoke brightness
,
of the two kinds of different wave lengths
under the same illumination E.When
can get the temperature computation formula according to dual wavelength color comparison temperature measurement technology when value is more or less the same
Wherein
is second radiation constant.The data that all optical fiber are obtained have combined to rise the distributed in three dimensions that just can obtain object temperature to be measured field like this.
Claims (1)
1. one kind based on the fibre bundle infrared colorimetric emission spectral chromatography method of sensing along separate routes; It is characterized in that this method gathers the radiation information of the infrared dual wavelength of a plurality of directions in flow field to be measured through many groups infrared optical fiber bundle planar array; Wherein every group of fibre bundle planar array multiply by N (being the capable N row of M) root infrared optical fiber by M and forms; Every optical fiber is divided into two-way by an one-to-two infrared optical fiber shunt again; Every road optical fiber is through different infrared narrow band filter slice and the infrared photoelectric sensor cascades of centre wavelength, and this fibre bundle sensing mode along separate routes can provide dual wavelength colorimetric emission spectral chromatography required raw data.
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| CN2012100533187A CN102589696A (en) | 2012-03-03 | 2012-03-03 | Infrared colorimetric emission spectrum chromatography method based on optical fiber bundle shunt sensing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527024A (en) * | 2016-02-04 | 2016-04-27 | 北京理工大学 | Temperature measurement device, system and method based on optical radiation |
Citations (3)
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|---|---|---|---|---|
| CN2255556Y (en) * | 1996-03-12 | 1997-06-04 | 中国科学院西安光学精密机械研究所 | Optical-fiber sensing flame monitoring device |
| CN201522558U (en) * | 2009-09-21 | 2010-07-07 | 深圳朗光科技有限公司 | Optical fiber divider |
| CN102353453A (en) * | 2011-08-27 | 2012-02-15 | 南昌航空大学 | Method for reconstructing flow field of optical fiber beams |
-
2012
- 2012-03-03 CN CN2012100533187A patent/CN102589696A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2255556Y (en) * | 1996-03-12 | 1997-06-04 | 中国科学院西安光学精密机械研究所 | Optical-fiber sensing flame monitoring device |
| CN201522558U (en) * | 2009-09-21 | 2010-07-07 | 深圳朗光科技有限公司 | Optical fiber divider |
| CN102353453A (en) * | 2011-08-27 | 2012-02-15 | 南昌航空大学 | Method for reconstructing flow field of optical fiber beams |
Non-Patent Citations (2)
| Title |
|---|
| 万雄: "发射光谱层析算法研究及其三维流场重建应用", 《中国博士论文全文数据库 信息科技辑》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527024A (en) * | 2016-02-04 | 2016-04-27 | 北京理工大学 | Temperature measurement device, system and method based on optical radiation |
| CN105527024B (en) * | 2016-02-04 | 2019-04-19 | 北京理工大学 | Temperature measuring equipment, system and method based on light radiation |
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Application publication date: 20120718 |