CN105334166A - Dual-detector near-infrared spectroscopy used for food composition analysis - Google Patents
Dual-detector near-infrared spectroscopy used for food composition analysis Download PDFInfo
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- CN105334166A CN105334166A CN201410403794.6A CN201410403794A CN105334166A CN 105334166 A CN105334166 A CN 105334166A CN 201410403794 A CN201410403794 A CN 201410403794A CN 105334166 A CN105334166 A CN 105334166A
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Abstract
The invention relates to a dual-detector near-infrared spectroscopy used for food composition analysis. The invention provides a continuous spectrum imaging testing device based on a liquid crystal light filter; a liquid crystal area array light filter is employed as a light splitter, an optical system is simple, a liquid crystal cell is added in common optical capturing equipment for realizing area array light splitting to obtain the continuous spectrum. The dual detector near-infrared spectroscopy comprises a light source, a sample to be measured, an optical lens, a liquid crystal light filter, a low-illumination area array CCD, a video acquisition card, a voltage controller and a computer; a structure of the dual detector near-infrared spectroscopy is characterized in that light emitted by light source irradiates the sample to be measured, the light reflected on the sample to be measured or excited light penetrates into the optical lens, then gathers through a lens of the optical lens, the gathered light passes through the liquid crystal light filter; a monochromatic light signal radiated by the liquid crystal light filter is absorbed by the low-illumination area array CCD, the monochromatic light signal is conversed to an electrical signal by the low-illumination area array CCD, then is acquired by the video acquisition card, and finally stored in the computer.
Description
Technical field
The invention belongs to the double detector near infrared spectrometer being applied in food composition analysis field tests, relate to a kind of double detector near infrared spectrometer for food composition analysis particularly.
Background technology
In recent years, near infrared spectrum, as the spectral analysis technique emerged rapidly, obtains increasing concern in analytical test field.Due near infrared spectrum be used for sample analysis time, substantially do not need to process sample, and do not destroy and consume sample, non-environmental-pollution again, so be rated as the green Typical Representative analyzed.Therefore, near-infrared spectral analysis technology, Fast Detection Technique harmless as one is just more and more by everybody approval.Near infrared technology has the features such as application is extensive, market capacity is large.
In near infrared commercial apparatus in current China market, home products is also few, particularly high-grade near-infrared analysis instrument, and major part is the product of offshore company; In addition, China not yet sets up the relevant criterion of Near-Infrared Spectroscopy Instruments and application technology.Therefore, domestic a large amount of research work concentrate on following two aspects: one is the near infrared spectrometer using import, analyzes different sample, heterogeneity content, the range of application of expansion near infrared spectrum; Two is analyze the spectroscopic data of sample, relatively less to the research of stoichiometry algorithm, Instrument Design, instrument performance.In this case, seminar is devoted to development and the popularization of near infrared spectroscopy instrument always.
Several optical filters that tradition optical filtering flap-type near infrared spectrometer is equipped be all instrument development personnel make to measure according to the application scenario of user certain composition of certain sample of analysis time characteristic wavelength used complete in the instrument development stage, if actual sample to be analyzed or composition there occurs change relative to the exploitation object of instrument, just again calibrate at last, the analysis degree of instrument generally also can significantly decline, and its application scenario receives certain restriction.With reference to Chinese invention patent, the patent No. is 200710157120.2, it discloses a kind of near infrared spectrometer; It is characterized in that near-infrared light source coordinates with collimation lens and form light-source system, collimation lens rear positions is equipped with intensity modulation dish and optical filter dish, be equipped with the double light path converting means be made up of light path chopper disk, catoptron afterwards, the integrating sphere light path that double light path converting means is arranged with front portion is connected, photodetector integrating sphere being equipped with rotating sample pool and being connected with signal processor.
Along with the development of near infrared spectroscopy instrument technology, based on the chemometrics method of continuous wavelength as PCR(principal component regression), PLSR(partial least squares regression), ANN(artificial neural network) etc., represent the developing direction of Modern Near-Infrared Spectroscopic Techniques, its corresponding continuous wave elongated instrument highly versatile, stable performance but structure relative complex, expensive.
Introduce the near-infrared diffuse reflection spectrum instrument of homemade optical filtering flap-type double detector structure thus, and apply the content that this spectrometer have detected milk powder, milk and soy sauce Related Component.
Summary of the invention
The present invention is exactly for the problems referred to above, makes up the deficiencies in the prior art, provides a kind of double detector near infrared spectrometer for food composition analysis; Adopt the optical filtering flap-type diffuse reflection near infrared spectrometer of self-control double detector structure, sample diffuse reflectance accurately can be obtained; And system light path is simple, has high reliability.The optical filtering flap-type near infrared spectrometer of self-control dual receiver structure may be used near infrared spectrum and detects, and may be used for the express-analysis work of other grain and food composition after further modeling.
For realizing above-mentioned purpose of the present invention, the present invention adopts following technical scheme.
A kind of double detector near infrared spectrometer for food composition analysis of the present invention, it mainly comprises 8 major parts: light source, beam splitting system, spectroscope, reference detector part, integrating sphere part, dress sample part, main receiver part and result display section; Its design feature is: the light sent by light source receives process through beam splitting system, the monochromatic light velocity that beam splitting system is launched the afterwards mirror that is split is divided into two-beam, the direct referenced explorer portion of light beam receives, and another bundle optical radiation is by being irradiated on the sample of dress sample part after integrating sphere part; Then the diffusion light information on integrating sphere portion collection sample, integrating sphere part is by diffusion light information transmitting in main receiver part, and last spectral signal is divided by main receiver portion and is sent to display section, via result display section display result.
As a preferred embodiment of the present invention, the homogeneous beam of the beam splitting system outgoing of the present invention mirror that is split is divided into two-beam, and the direct referenced explorer portion of light beam receives, and the energy of this Shu Guang only accounts for about 4% of the monochromatic light energy of beam splitting system outgoing.
As another kind of preferred version of the present invention, another bundle optical radiation of beam splitting system outgoing of the present invention is by being irradiated on sample after integrating sphere part, the diffusion light information of integrating sphere portion collection sample, and divide reception by the main receiver portion be arranged in integrating sphere part; Main receiver part is installed according to 0 ° ~ 45 ° incident receiving positions in integrating sphere part.
The invention has the beneficial effects as follows.
The present invention adopts the optical filtering flap-type diffuse reflection near infrared spectrometer of self-control double detector structure, and the feature that wherein homemade double detector near infrared spectrometer is different from Other Instruments is its dual receiver structure; Its comparatively simple structure verification feasibility of double detector spectrometer, this structure is beneficial to lowering apparatus cost, easily realizes customizations.
The present invention utilizes homemade double detector near infrared spectrometer instrument to have detected the diffuse reflectance of diffuse reflection on-gauge plate, the related coefficient average out to 0.995 of measured value and nominal value, standard deviation average out to 0.01; In addition, use this Instrument measuring milk powder, milk and soy sauce Related Component content, the protein of near infrared spectrum and milk powder and the related coefficient >0.9 of fat content, with the related coefficient >0.8 of the Related Component content of soy sauce and former milk, homemade double detector structure optical filtering flap-type near infrared spectrometer accurately can obtain the diffuse reflectance of sample.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of a kind of double detector near infrared spectrometer for food composition analysis of the present invention.
Wherein, 1 be light source, 2 be beam splitting system, 3 be spectroscope, 4 be reference detector part, 5 be integrating sphere part, 6 be result display section for dress sample part, 7 is main receiver part, 8.
Embodiment
As shown in Figure 1, be the structured flowchart of a kind of double detector near infrared spectrometer for food composition analysis of the present invention.Figure comprises 8 major parts: light source 1, beam splitting system 2, spectroscope 3, reference detector part 4, integrating sphere part 5, dress sample part 6, main receiver part 7 and result display section 8; The light sent by light source 1 receives process through beam splitting system 2, the monochromatic light velocity that beam splitting system 2 is launched the afterwards mirror 3 that is split is divided into two-beam, the direct referenced detector 4 of light beam receives, and another bundle optical radiation is by being irradiated on the sample of dress sample part 6 after integrating sphere part 5; Then integrating sphere part 5 collects the diffusion light information on sample, and integrating sphere part 5 is by diffusion light information transmitting in main receiver part 7, and last spectral signal is sent to display section by main receiver part 7, shows result via result display section 8.
The homogeneous beam of the beam splitting system 2 of the present invention outgoing mirror that is split is divided into two-beam, and the direct referenced explorer portion 4 of light beam receives, and the energy of this Shu Guang only accounts for about 4% of the monochromatic light energy of beam splitting system outgoing; Another bundle optical radiation of described beam splitting system 2 outgoing is by being irradiated on sample after integrating sphere part 5, and integrating sphere part 5 collects the diffusion light information of sample, and is received by the main receiver part 7 be arranged in integrating sphere part 5; Main receiver part 7 is installed according to 0 ° ~ 45 ° incident receiving positions in integrating sphere part 5.
Claims (3)
1. for a double detector near infrared spectrometer for food composition analysis, comprising: light source (1), beam splitting system (2), spectroscope (3), reference detector part (4), integrating sphere part (5), dress sample part (6), main receiver part (7) and result display section (8); It is characterized in that: the light sent by light source (1) receives process through beam splitting system (2), the monochromatic light velocity that beam splitting system (2) is launched the afterwards mirror (3) that is split is divided into two-beam, the direct referenced explorer portion (4) of light beam receives, and another bundle optical radiation is by being irradiated on the sample of dress sample part (6) after integrating sphere part (5); Then integrating sphere part (5) collects the diffusion light information on sample, integrating sphere part (5) by diffusion light information transmitting on main receiver part (7), last spectral signal is sent to display section by main receiver part (7), via result display section (8) display result.
2. a kind of double detector near infrared spectrometer for food composition analysis according to claim 1, it is characterized in that: the homogeneous beam of described beam splitting system (2) the outgoing mirror that is split is divided into two-beam, the direct referenced explorer portion (4) of light beam receives, and the energy of this Shu Guang only accounts for about 4% of the monochromatic light energy of beam splitting system outgoing.
3. a kind of double detector near infrared spectrometer for food composition analysis according to claim 1, it is characterized in that: another bundle optical radiation of described beam splitting system (2) outgoing is irradiated on sample by after integrating sphere part (5), integrating sphere part (5) collects the diffusion light information of sample, and is received by the main receiver part (7) be arranged in integrating sphere part (5); Main receiver part (7) is installed according to 0 ° ~ 45 ° incident receiving positions in integrating sphere part (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410403794.6A CN105334166A (en) | 2014-08-15 | 2014-08-15 | Dual-detector near-infrared spectroscopy used for food composition analysis |
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| CN201410403794.6A CN105334166A (en) | 2014-08-15 | 2014-08-15 | Dual-detector near-infrared spectroscopy used for food composition analysis |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908409A (en) * | 2017-03-29 | 2017-06-30 | 云南小宝科技有限公司 | A kind of evaluation method of the naughty milk powder product quality in sea |
| CN107389599A (en) * | 2017-07-27 | 2017-11-24 | 中国农业大学 | A kind of near-infrared scattered reflection type spectrometer for milk constituents detection |
| US11330983B2 (en) | 2018-03-30 | 2022-05-17 | Samsung Electronics Co., Ltd. | Electronic device for acquiring state information on object, and control method therefor |
| CN116297320A (en) * | 2023-05-09 | 2023-06-23 | 北京易兴元石化科技有限公司 | Near infrared spectrum system for coal quality analysis and coal quality analysis method |
-
2014
- 2014-08-15 CN CN201410403794.6A patent/CN105334166A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908409A (en) * | 2017-03-29 | 2017-06-30 | 云南小宝科技有限公司 | A kind of evaluation method of the naughty milk powder product quality in sea |
| CN107389599A (en) * | 2017-07-27 | 2017-11-24 | 中国农业大学 | A kind of near-infrared scattered reflection type spectrometer for milk constituents detection |
| US11330983B2 (en) | 2018-03-30 | 2022-05-17 | Samsung Electronics Co., Ltd. | Electronic device for acquiring state information on object, and control method therefor |
| CN116297320A (en) * | 2023-05-09 | 2023-06-23 | 北京易兴元石化科技有限公司 | Near infrared spectrum system for coal quality analysis and coal quality analysis method |
| CN116297320B (en) * | 2023-05-09 | 2023-09-08 | 北京易兴元石化科技有限公司 | Near infrared spectrum system for coal quality analysis and coal quality analysis method |
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Application publication date: 20160217 |
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