CN101813623B - Scatterer multi-dimensional spectral measuring unit and method - Google Patents
Scatterer multi-dimensional spectral measuring unit and method Download PDFInfo
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- CN101813623B CN101813623B CN2010101522941A CN201010152294A CN101813623B CN 101813623 B CN101813623 B CN 101813623B CN 2010101522941 A CN2010101522941 A CN 2010101522941A CN 201010152294 A CN201010152294 A CN 201010152294A CN 101813623 B CN101813623 B CN 101813623B
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Abstract
The invention discloses a scatterer multi-dimensional spectral measuring unit, which comprises a light source, a sample cell, an emergent light detector and a physical disturbance generator, wherein the incident position of the light source is fixed; the cross section of the sample cell is square, and the position of the sample cell is fixed; the emergent light guiding device is movable, thereby changing the light path formed by the sample cell, the light source and the emergent light detector; and the disturbance generator can apply physical disturbance to the detected object. The invention also discloses a scatterer multi-dimensional spectral measuring method. By moving the emergent light detector in the horizontal direction and the vertical direction, the radius spectral distribution of the emergent light spots is acquired, thereby realizing the mutually uncorrelated nonlinear spectral measurement of multiple light path lengths. Meanwhile, the invention applies a physical disturbing signal on the detected object, thereby obtaining the multi-dimensional spectral information of the detected object of which the light path length and the physical disturbing signal are variable. Thus, the invention can provide more abundant substance content information and enhance the accuracy for substance composition analysis.
Description
Technical field
The present invention relates to a kind of spectroscopic analysis system, especially relate to a kind of scatterer multi-dimensional spectral measuring unit and method that is used for muddy scatterer constituent analysis.
Background technology
Spectral analysis is one of important means of the research structure of matter, mainly comprises infrared spectrum, Raman spectrum, fluorescence spectrum, ultraviolet-visible absorption spectroscopy, near infrared spectrum, and the mutually combining of various dynamic spectrum and other means.Wherein, near infrared spectrum soon, does not destroy characteristics such as sample, simple to operate, good stability, efficient height with its speed, has been widely used in every field.Because the continuous development of various science and technology such as optics, microcomputer data processing, chemical luminosity theory and method, spectroscopic analysis methods has been applied in fields such as pharmacy, tobacco, food, polymkeric substance, textile, paint, coal and petroleum industry, the composition of measuring is also more and more, and measuring accuracy is also more and more higher.
The non-linear introducing that many optical lengths spectral measurement method causes the material scattering, utilize the equivalent absorption coefficient difference of the sample of different optical lengths, the mutual incoherent spectrum nonlinear characteristic of spectrum that different optical lengths record, use many optical lengths spectrum to participate in modeling simultaneously in theory the more information of multisample component content can be provided, can obtain more excellent model performance than the modeling of single optical length spectrum.
Two-dimensional correlation The Application of Technology scope expands to the spectroscopy technology such as infrared, near infrared, Raman, fluorescence from nuclear-magnetism, and broad sense two-dimensional correlation spectral technique becomes the research method of widespread use in the spectral analysis at present gradually.In the two-dimensional correlation spectral technique, on the sample system, make sample excitation by the perturbation of a definite form, by measuring a series of vibration dynamic spectrum, and utilize mathematical correlation analysis to obtain the two-dimensional correlation spectrogram.The form of disturbing outward is varied, from simple sine wave, pulsating wave, disturb outside at random noise or static physical change all can be applicable to.Broad sense two-dimensional correlation The Application of Technology expands to spectral signal on second dimension, improved spectral resolution, simplified the complex spectrum that contains multiple overlap peak, and can differentiate and the interior and intermolecular interaction of research molecule by the correlationship that changes between each signal peak is provided.
Summary of the invention
At above-mentioned prior art, the invention provides a kind of scatterer multi-dimensional spectral measuring unit and method.The present invention can make full use of the scattering properties and the two-dimensional correlation spectral technique of material, thereby by changing the distribution that light source and emergent light let-off gear(stand) relative position obtain many optical lengths transmitted spectrum, and on measured object, add physical perturbation, obtain the spectral information of measured matter multidimensional, thereby improve measured object component concentration analysis precision, organic, pick up multiple spectral information efficiently, at low cost.
In order to solve the problems of the technologies described above, a kind of technical scheme that scatterer multi-dimensional spectral measuring unit of the present invention is achieved is, this device comprises light source, sample cell, emergent light detecting device and disturbance device, the incoming position of described light source is fixed, described sample cell position be fix and the cross section be square; Described emergent light detecting device is movably, and described light source penetrates and changes to the formed light path of emergent light detecting device through sample cell; Described disturbance device is one to be used for measured object is applied the physical perturbation device of physical perturbation.
The another kind of technical scheme that scatterer multi-dimensional spectral measuring unit of the present invention is achieved is, comprise light source, sample cell, emergent light let-off gear(stand), emergent light detecting device and disturbance device, the incoming position of described light source is fixed, described sample cell position be fix and the cross section be square; Described emergent light let-off gear(stand) is movably, and described light source penetrates and changes through sample cell and the formed light path of emergent light let-off gear(stand); Described disturbance device is one to be used for measured object is applied the physical perturbation device of physical perturbation.
Scatterer multi-dimensional spectral measuring method of the present invention, utilize a kind of scatterer multi-dimensional spectral measuring unit in above-mentioned two kinds to measure, light source direct irradiation or after optical fiber, slit or aperture import sample cell, described emergent light detecting device (or emergent light detecting device) along continuous straight runs or vertical direction are moved, and utilize the emergent light detecting device to gather spectrum on the outgoing spot radius, realize the mutual incoherent nonlinear optical spectrometry of many optical lengths, to obtain the distributed incoherent nonlinear optical spectrum information of measured matter; Simultaneously, utilize described disturbance device that testee is applied electricity, heat, magnetic, sound or mechanical disturbance signal, to obtain the multidimensional spectral information that optical length and physical perturbation signal are the measured object of variable, and then abundanter content of material information is provided, improve analysis precision to the measured object material composition.
Compared with prior art, the invention has the beneficial effects as follows:
Because spectral measurement of the present invention adopts is emergent light receiving position movably, the emergent light detecting device is spectroscopic detector or optical spectrum imaging device, utilize emergent light detecting device and light source relative position (if be provided with the emergent light let-off gear(stand), then be to utilize emergent light let-off gear(stand) and light source relative position) change bring the variation of optical length, and then obtain the non-linear spectral of many optical lengths; Simultaneously, the present invention also applies the physical perturbation signal to testee, obtains the distributed multidimensional spectral information of measured object under different physical conditions, and detected material component concentration analysis precision is improved.
Description of drawings
Fig. 1 is to use scatterer multi-dimensional spectral measuring unit of the present invention to carry out the synoptic diagram of multi-dimensional spectral measuring;
Fig. 2 is the synoptic diagram of multi-dimensional spectral measuring one embodiment of the present invention;
Fig. 3 is the synoptic diagram of another embodiment of multi-dimensional spectral measuring of the present invention.
Description of reference numerals in the above-mentioned accompanying drawing:
1---light source gatherer 2---sample cell 3---emergent light let-off gear(stand)
5---optical spectrum imaging device 4---disturbance device
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the invention is done to describe in further detail.
As shown in Figure 1, scatterer multi-dimensional spectral measuring unit of the present invention, comprise that light source, light source gatherer 1, a cross section are square sample cell 2, emergent light let-off gear(stand) 3, emergent light pick-up unit and disturbance device 4, the position of this light source gatherer 1 and sample cell 3 is fixed, and the position of emergent light let-off gear(stand) 3 is movably, with this, realize the variation of light path.If light source gatherer 1 is not set between light source and sample cell, then light source direct irradiation sample cell 2 is provided with light source gatherer 1, and then light source imports sample cell through optical fiber, slit, aperture.Emergent light is received by spectroscopic detector or optical spectrum imaging device behind emergent light let-off gear(stand) 3, the wave band of described spectroscopic detector or optical spectrum imaging device response comprise ultraviolet, visible, infrared in the combination of one or more wave bands.The disturbance device 4 of multi-dimensional spectral measuring device of the present invention is a physical perturbation device, can be according to applying such as disturbances such as electricity, heat, magnetic, sound, machineries measured object.
In the scatterer multi-dimensional spectral measuring method of the present invention, by to the position of emergent light detecting device (if be provided with emergent light let-off gear(stand) 3, then to the position of this emergent light let-off gear(stand)) carry out moving of horizontal direction or vertical direction, the emergent light detecting device is gathered the spectrum on the outgoing spot radius, by emergent light detecting device and light source and sample cell 2 relative positions (if be provided with emergent light let-off gear(stand) 3, then be by emergent light let-off gear(stand) 3 and light source and sample cell 2 relative positions) change form the variation of light path, realize the mutual incoherent nonlinear optical spectrometry of many optical lengths, thereby obtain the distributed incoherent nonlinear optical spectrum information of measured matter.Simultaneously, 4 pairs of testees of physical perturbation device apply disturbing signal, and then obtain optical length and the physical perturbation signal is the multidimensional spectral information of the measured object of variable, and then abundanter content of material information is provided, and improve the material composition analysis precision.
As shown in Figure 2, light source is imported by the light source gatherer 1 that optical fiber constitutes, a side incident from the sample cell 2 that adds tested scatterer, its incoming position is fixed, emergent light by one movably the emergent light let-off gear(stand) that constitutes of fibre-optical probe 3 derive, and the spectroscopic detector that reaches as the emergent light detecting device receives.In the measuring process, incident light position is fixed, and the outgoing fibre-optical probe carries out rectilinear scanning along the radius of outgoing hot spot, obtains the distribution of the outgoing spectrum of this incident light position thus.Attemperating unit is as disturbance device 4, measurement is external disturbance with the temperature, after finishing the spectral scan of an outgoing spot radius, changes the measured object temperature by attemperating unit, carry out outgoing spot radius spectral scan next time, until the outgoing spectrum distribution measuring of finishing under all design temperatures.
As shown in Figure 3, light source is imported by optical fiber 1, and from a side incident of the sample cell 2 that adds tested scatterer, emergent light is received by the optical spectrum imaging device 5 as the emergent light detecting device.In the measuring process, incident light position is fixed, and gathers the spectral distribution of outgoing hot spot along radius by optical spectrum imaging device 5.Attemperating unit is as disturbance device 4, measurement is external disturbance with the temperature, after finishing outgoing spot radius spectra collection, changes the measured object temperature by attemperating unit, carry out outgoing spot radius spectra collection next time, until the outgoing spectrum distribution measuring of finishing under all design temperatures.
Although top invention has been described in conjunction with figure; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; under the situation that does not break away from aim of the present invention, can also make a lot of distortion, these all belong within the protection of the present invention.
Claims (10)
1. a scatterer multi-dimensional spectral measuring unit comprises light source, sample cell, emergent light detecting device and disturbance device, and it is characterized in that: the incoming position of described light source is fixed, described sample cell position be fix and the cross section be square; Described emergent light detecting device is movably, and described light source penetrates and changes to the formed light path of emergent light detecting device through sample cell; Described disturbance device is one to be used for measured object is applied the physical perturbation device of physical perturbation.
2. according to the described scatterer multi-dimensional spectral measuring unit of claim 1, it is characterized in that: be provided with the light source gatherer between described light source and the described sample cell, described light source gatherer is optical fiber or grating, and described light source imports sample cell through the slit of optical fiber or grating or the aperture of grating.
3. it is characterized in that according to the described scatterer multi-dimensional spectral measuring unit of claim 1: described emergent light detecting device is a spectroscopic detector or an optical spectrum imaging device, the wave band of described spectroscopic detector or optical spectrum imaging device response comprise ultraviolet, visible, infrared in the combination of one or more wave bands.
4. according to the described scatterer multi-dimensional spectral measuring unit of claim 1, it is characterized in that: described disturbance device adopts electricity, heat, magnetic, sound or mechanical disturbance mode.
5. scatterer multi-dimensional spectral measuring method, it is characterized in that: utilize multi-dimensional spectral measuring device as claimed in claim 1 to measure, light source direct irradiation or after optical fiber, slit or aperture import sample cell, emergent light detecting device along continuous straight runs or vertical direction are moved, and utilize the emergent light detecting device to gather spectrum on the outgoing spot radius, realize the mutual incoherent nonlinear optical spectrometry of many optical lengths, to obtain the distributed incoherent nonlinear optical spectrum information of measured matter; Simultaneously, utilize described disturbance device that measured matter is applied electricity, heat, magnetic, sound or mechanical disturbance signal, to obtain the multidimensional spectral information that optical length and physical perturbation signal are the measured object of variable, and then abundanter content of material information is provided, improve analysis precision to the measured object material composition.
6. scatterer multi-dimensional spectral measuring unit, comprise light source, sample cell, emergent light let-off gear(stand), emergent light detecting device and disturbance device, it is characterized in that: the incoming position of described light source is fixed, described sample cell position be fix and the cross section be square; Described emergent light let-off gear(stand) is movably, and described light source penetrates and changes through sample cell and the formed light path of emergent light let-off gear(stand); Described disturbance device is one to be used for measured object is applied the physical perturbation device of physical perturbation.
7. according to the described scatterer multi-dimensional spectral measuring unit of claim 6, it is characterized in that: be provided with the light source gatherer between described light source and the described sample cell, described light source gatherer is optical fiber or grating, and described light source imports sample cell through the slit of optical fiber or grating or the aperture of grating.
8. according to the described scatterer multi-dimensional spectral measuring unit of claim 6, it is characterized in that: described emergent light detecting device is a spectroscopic detector or an optical spectrum imaging device, the wave band of described spectroscopic detector or optical spectrum imaging device response comprise ultraviolet, visible, infrared in the combination of one or more wave bands.
9. according to the described scatterer multi-dimensional spectral measuring unit of claim 6, it is characterized in that: described disturbance device adopts electricity, heat, magnetic, sound or mechanical disturbance mode.
10. scatterer multi-dimensional spectral measuring method, it is characterized in that: utilize multi-dimensional spectral measuring device as claimed in claim 6 to measure, light source direct irradiation or after optical fiber, slit or aperture import sample cell, emergent light let-off gear(stand) along continuous straight runs or vertical direction are moved, and utilize the emergent light detecting device to gather spectrum on the outgoing spot radius, realize the mutual incoherent nonlinear optical spectrometry of many optical lengths, to obtain the nonlinear optical spectrum information of the distributed phase of measured matter; Simultaneously, utilize described disturbance device that measured matter is applied electricity, heat, magnetic, sound or mechanical disturbance signal, to obtain the multidimensional spectral information that optical length and physical perturbation signal are the measured object of variable, and then abundanter content of material information is provided, improve analysis precision to the measured object material composition.
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