CN205120594U - Portable raman probe and detection device - Google Patents
Portable raman probe and detection device Download PDFInfo
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- CN205120594U CN205120594U CN201520877850.XU CN201520877850U CN205120594U CN 205120594 U CN205120594 U CN 205120594U CN 201520877850 U CN201520877850 U CN 201520877850U CN 205120594 U CN205120594 U CN 205120594U
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Abstract
The utility model relates to a portable raman probe and detection device. This probe includes: excite optic fibre, the nearly normal position of a plurality of root to collect optic fibre, the non - normal position of a plurality of roots collection optic fibre, interlayer, focusing lens group, window and encapsulation shell, wherein: the nearly normal position of a plurality of root is collected optic fibre and is surrounded and exciting optic fibre around, the interlayer sets up around optic fibre is collected to the nearly normal position of a plurality of roots for it separates the certain distance with nearly normal position collection optic fibre to collect optic fibre with non - normal position, the non - normal position of a plurality of roots collection optic fibre surrounds around the interlayer, just is concentric ring with the nearly normal positions collection optic fibre of a plurality of roots and arranges, focusing lens group sets up in the one end that excites optic fibre with collect optic fibre, and its center lies in the the central axis who excites optic fibre, the window setting is organized at focusing lens and is kept away from the one side that excites optic fibre, the setting of encapsulation shell is around the non - normal position of a plurality of roots collection optic fibre, focusing lens group and window. The utility model discloses compact structure, easily realization are convenient for hand -carry, more are suitable for field and witnessed inspections.
Description
Technical field
The utility model relates to agricultural product technical field of spectral detection, particularly relates to a kind of portable Raman probe and the pick-up unit that detect fruits and vegetables epidermis and internal information simultaneously.
Background technology
Raman spectroscopy is applied to the detection of carotenoid content in fruits and vegetables by existing research both at home and abroad, and have developed polytype Portable Raman optical spectrum checkout equipment for related application.Raman fiber detection probe is as the core component of Raman detection equipment, and its light channel structure and parameter determine the performance of whole system.Current commercial Raman fiber optic probe is in situ detection structure, and namely shot point and signal acquisition point are same position, and this mode can only detect the Raman signal of fruit and vegetable surfaces, and cannot obtain fruits and vegetables internal information.In order to the following organizational information in surface can be obtained, need to carry out ex situ detection, separate by shot point and sensing point, now photon will enter epidermis, and move from shot point to sensing point in interior tissue below epidermis, thus by transfer spectral information through path be collected optical fiber detect to sensing point place.Photon just represents the interior tissue degree of depth that can detect in the degree of depth that fruits and vegetables internal migration path reaches.Along with pump probe spacing increases, the photon transmission degree of depth is corresponding increase also, based on inner organizational information, will significantly eliminate the impact of epidermis in the spectral information now detected at surf zone simultaneously.
In order to comparatively comprehensively characterize fruit-vegetable quality, need to detect fruits and vegetables epidermis and interior tissue information simultaneously.In prior art, the people such as PavelMatousek proposed a kind of Raman probe carrying out original position and ex situ simultaneously and detect in 2006,7 optical fiber arrangements in center probe, for detecting in-situ Raman signal; 26 optical fiber are arranged in around center ringwise, for detecting ex situ Raman signal; Straight line is arranged into according to numbering, for the entrance slit of match spectrum instrument at all optical fiber of fiber-optic output.The Raman probe that this research institute relates to only can collect spectral signal, and excited sample needs additionally to introduce excitation light path, fails realization excite and detect integrated, thus adds the complicacy of system call interception, is difficult to meet portable use.
Utility model content
One of them object of the present utility model is to provide a kind of portable Raman probe and the pick-up unit that detect fruits and vegetables epidermis and internal information simultaneously, needs to quote extra excitation light path to solve in prior art and cannot realize exciting and the technical matters detected simultaneously.
For realizing above-mentioned utility model object, first aspect, the utility model embodiment provides a kind of portable Raman probe, comprising: excitation fiber, some nearly original positions collect optical fiber, some ex situs collections optical fiber, interlayer, focus lens group, window and package casings, wherein:
Described some nearly original positions collect fiber optic loop around described excitation fiber;
Described interlayer is arranged on described some nearly original positions and collects around optical fiber, and for ex situ being collected optical fiber and nearly original position, to collect optical fiber spaced apart;
Described some ex situs collect fiber optic loop around described interlayer, and to collect optical fiber with described some nearly original positions be that donut is arranged;
Described focus lens group is arranged on described excitation fiber and collects one end of optical fiber, and it is centrally located on the central axis of described excitation fiber;
Described window is arranged on the side of described focus lens group away from described excitation fiber;
Described package casing is arranged on described some ex situs and collects around optical fiber, described focus lens group and described window, and for coated described excitation fiber, described some nearly original positions collect optical fiber and described some ex situs are collected optical fiber and fix described focus lens group and described window.
Alternatively, also comprise trigger key, described trigger key is arranged in described package casing, and its connection terminal place is provided with the wire that the central axial direction along described excitation fiber is arranged.
Alternatively, to collect the core diameter that optical fiber and any described ex situ collect optical fiber identical with numerical aperture for any described nearly original position.
Alternatively, the core diameter that described nearly original position collection optical fiber and described ex situ collect optical fiber is 200 μm, and numerical aperture is 0.37.
Alternatively, described package casing and described interlayer adopt the stainless steel of identical material to make.
Alternatively, described compartment thickness is 3mm.
Alternatively, described focus lens group comprises collimation lens and convergent lens, wherein:
The planar side of described collimation lens is arranged on described excitation fiber and collects one end of optical fiber, and convex side is relative with the convex side of described convergent lens; Described convergent lens planar side is provided with described window.
Alternatively, the distance d between the center of described collimation lens and the end face of described excitation fiber equals the focal length of this collimation lens; Distance d ' between the center of described convergent lens and described window equals the focal length of this convergent lens.
Alternatively, the focal length of described collimation lens and described convergent lens is 10cm; Described distance d and described distance d ' is 10cm.
Second aspect, the utility model embodiment still provides a kind of portable detector, comprising: portable Raman probe, controller, laser instrument and spectrometer mentioned above, wherein:
In described portable Raman probe excitation fiber away from one end of window by being connected with the tail optical fiber of described laser instrument after incident diaphragm shell fragment;
Described incident diaphragm shell fragment is controlled by the actuator be connected with described controller;
In described portable Raman probe, some nearly original positions are collected optical fiber and some ex situs and are collected optical fiber and be connected with described spectrometer away from one end of described window, and in described portable Raman probe, each root nearly original position collection optical fiber and each root ex situ collection optical fiber match away from the center of one end of window and the entrance slit of described spectrometer.
The utility model is by collecting optical fiber be integrated in excitation fiber, nearly original position collection optical fiber, ex situ in same portable Raman probe, and the synchronous integrated achieving fruits and vegetables epidermis and internal information detects; Eliminating operating distance by arranging sample window, achieving contact Non-Destructive Testing, simplify light path adjustment process; Exposure and sampling process can be controlled easily by trigger key, add the convenience of detection.The utility model compact conformation, succinct, be easy to realize, be convenient to carry with, be more suitable for field and Site Detection.
Accompanying drawing explanation
Can understanding feature and advantage of the present utility model clearly by reference to accompanying drawing, accompanying drawing is schematic and should not be construed as and carry out any restriction to the utility model, in the accompanying drawings:
Fig. 1 is the portable Raman probe diagrammatic cross-section of one that the utility model embodiment provides;
Fig. 2 is the sectional view of portable Raman probe shown in Fig. 1;
Fig. 3 is the connection diagram of a kind of portable detector that the utility model embodiment provides;
Fig. 4 is portable Raman probe and spectrometer connection diagram;
Accompanying drawing illustrates:
The portable Raman probe of 100-, 101-excitation fiber, the nearly original position of 102-collects optical fiber, 103-ex situ collects optical fiber, 104-interlayer, 105-focus lens group, 1051-collimation lens, 1052-convergent lens, 106-window, 107-package casing, 108-trigger key, 109-wire, 110-sample, 111-Laser Focusing center, the nearly in situ detection point of 112-, 113-ex situ check point, 200-laser instrument, 300-controller, 301-actuator, the incident diaphragm shell fragment of 302-, 400-spectrometer, 401-cutoff filter.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
First aspect, the utility model embodiment provides a kind of portable Raman probe, as shown in Figures 1 and 2, comprise: excitation fiber 101, some nearly original positions collect optical fiber 102, some ex situs collections optical fiber 103, interlayer 104, focus lens group 105, window 106 and package casings 107, wherein:
Excitation fiber 101, for singly to enter singly to go out fibre bundle, is positioned at this portable Raman probe 100 center position;
Some nearly original positions are collected optical fiber 102 and are looped around excitation fiber 101 around;
Interlayer 104 is arranged on some nearly original positions and collects around optical fiber 102, and for some nearly original positions being collected optical fiber 102 and some ex situs, to collect optical fiber 103 spaced apart;
Some ex situs are collected optical fiber 103 and are looped around around interlayer 104, and to collect optical fiber 102 with some nearly original positions be that donut is arranged;
Focus lens group 105 is arranged on one end of excitation fiber 101 and some nearly original position collection optical fiber 102 and some ex situ collection optical fiber 103, and it is centrally located on the central axis of excitation fiber 101;
Window 106 is arranged on the side of focus lens group 105 away from excitation fiber 101;
Package casing 107 is arranged on some ex situs and collects optical fiber 103, focus lens group 105 and windows 106 around, collects optical fiber 102 and some ex situs collects optical fiber 103 and fixed focus lenses group 105 and window 106 for coated excitation fiber 101, some nearly original positions.
In practical application, for convenience of user of service's operation, alternatively, the portable Raman probe 100 that the utility model embodiment provides also comprises trigger key 108.As shown in Figure 1, this trigger key 108 is arranged in package casing 107, is connected with the wire 109 of arranging along excitation fiber 101 central axial direction by the connection terminal of this trigger key 108.
In practical application, carry out collimating and focusing on owing to adopting identical focus lens group 105, therefore for ensureing that all optical fiber can correctly focus on, alternatively, excitation fiber 101, some nearly original position collection optical fiber 102 and some ex situs are collected optical fiber 103 and are adopted identical optical fiber to make, and they have identical material, core diameter and numerical aperture.Those skilled in the art can according to concrete use occasion, and be respectively excitation fiber 101, some nearly original position collection optical fiber 102 and some ex situs collection optical fiber 103 and select suitable material, core diameter and numerical aperture, the utility model is not construed as limiting.
In practical application, for simplifying manufacture craft, interlayer 104 and package casing 107 adopt identical material to make.Those skilled in the art can select according to concrete use occasion, and the utility model is not construed as limiting.
In actual practicality, for obtaining higher launching efficiency, as shown in Figure 1, the focus lens group 105 that the utility model embodiment provides comprises collimation lens 1051 and convergent lens 1052.Wherein, the distance d between the center of collimation lens 1051 and excitation fiber 101 end face equals the focal length of collimation lens 1051.Distance d ' between the center of convergent lens 1052 and window 104 equals the focal length of convergent lens 1051.
Second aspect, the utility model embodiment still provides a kind of portable detector, as shown in Figure 3, comprises portable Raman probe 100 mentioned above, controller 300, laser instrument 200 and spectrometer 400, wherein:
In portable Raman probe 100, excitation fiber 101 is connected with the tail optical fiber of laser instrument 200 by after incident diaphragm shell fragment 302 away from one end of window 106;
Incident diaphragm shell fragment 302 is controlled by the actuator 301 be connected with controller 300;
In portable Raman probe 100, nearly original position is collected optical fiber 102 and ex situ and is collected optical fiber 103 and be all connected with spectrometer 400 away from one end of window, and in portable Raman probe 100, the nearly original position collection optical fiber 102 of each root and each root ex situ collection optical fiber 103 match away from the center of one end of window 106 and the entrance slit of spectrometer 400.
Will be understood that, actuator 301 for controlling the position of incident diaphragm shell fragment 302, to adjust the amount of laser light inciding testing sample.Alternatively, this actuator 301 can be the one in motor, angle electromagnetic iron or straight-line electric magnet valve.Certain art technology can select suitable actuator to realize according to the function of this actuator 301, and the utility model is not construed as limiting.
In practical application, in the utility model embodiment, portable Raman probe 100 comprises the nearly original position collection optical fiber 102 of 1 excitation fiber 101,6 and 32 ex situs collection optical fiber 103.Wherein 6 nearly original position collection optical fiber 102 and 32 ex situs are collected optical fiber 103 and are equally looped around excitation fiber 101 around, and both are concentric circles arrangement.The interlayer 104 be made up of stainless steel separates 3mm distance for 6 nearly original positions collection optical fiber 102 and 32 ex situs are collected optical fiber 103.The window 106 be made up of quartz is positioned at portable Raman probe 100 foremost.The nearly original position of the coated excitation fiber of closure 107 be made up of stainless steel 101,6 collects optical fiber 102 and 32 ex situs collect optical fiber 103 and fixed focus lenses group 105 and window 106.Trigger key 108 is installed on the sidewall of the closure be made up of stainless steel.One end of wire 109 is connected with trigging control 108, and the other end is connected with controller 300 through closure.
In practical application, the nearly original position of excitation fiber 101,6 collects optical fiber 102 and 32 ex situs collection optical fiber 103 core diameters are 200 μm, and numerical aperture is 0.37.Those skilled in the art can select suitable optical fiber to make the nearly original position of above-mentioned excitation fiber 101,6 according to concrete use scenes and collect optical fiber 102 and 32 ex situs collection optical fiber 103, and the utility model is not construed as limiting.
In practical application, in focus lens group 105, the diameter of collimation lens 1051 and both convergent lenses 1052 and focal length are 10mm.Wherein, the distance d between collimation lens 1051 center and excitation fiber 101 end face and the distance d ' between the center of convergent lens 1052 and window 106 is 10mm.Those skilled in the art can rationally arrange above-mentioned distance according to the situation of selected lens, and the utility model is not construed as limiting.
In practical application, incident diaphragm shell fragment 302 is the aluminium flake through blackening process, is controlled to stretch out and retraction by actuator 301.Alternatively, the actuator 301 that the utility model embodiment provides adopts straight-line electric magnet valve to realize.This straight-line electric magnet valve is connected with controller 300 by wire.
In practical application, controller 300 comprises control chip and peripheral circuit, and wherein this control chip can select the one in single-chip microcomputer, DSP or ARM.Those skilled in the art can according to concrete use scenes, and select suitable control chip and corresponding peripheral circuit to realize the function of above-mentioned controller 300, the utility model is not construed as limiting.
In practical application, spectrometer 400 adopts the area array CCD detector of high s/n ratio, low interference effect, and its sensitive surface is of a size of 1024 × 400, and wavelength response range is 200 ~ 1100nm, is connected with controller 300 by USB2.0 interface.Those skilled in the art can according to concrete use scenes, and select suitable spectrometer 400 to realize acquisition function, the utility model is not construed as limiting.
As shown in Figure 4, spectrometer and nearly original position collect optical fiber 102 and ex situ collects optical fiber 103 connected mode: 6 nearly original positions collect optical fiber 102 and 32 ex situs collect optical fiber 103 equally wire arrange, the entrance slit of center and spectrometer 400 matches, the order that nearly original position collects optical fiber 102 1-6 by number comes top, and the order that ex situ collects optical fiber 103 1-32 by number comes below.
The course of work of the pick-up unit that the utility model embodiment provides, as shown in Figures 1 and 3, comprising:
Device starts, and arranges sampling parameter.By the window 106 of portable Raman probe 100 and fruits and vegetables sample 110 intimate surface contact to be measured.Manual operation trigger key 108, straight-line electric magnet valve 301 stretches out, and opens incident diaphragm shell fragment 302, and the laser that laser instrument 200 is sent enters portable Raman probe 100.This laser, after excitation fiber 101, continues through focus lens group 105; Above-mentioned laser is carried out collimation calibration by this focus lens group 105; Laser after collimation enters Laser Focusing center 111 place on fruits and vegetables sample 100 surface to be measured by window 106.Laser transfers to nearly in situ detection point 112 place after extremely short migration path, and the epidermis Raman signal line focus lens combination 105 inspired collimates respectively and converges to nearly original position collects optical fiber 102 end face; Laser transfers to ex situ check point 113 place after longer migration path, and the interior tissue Raman signal line focus lens combination 105 inspired collimates respectively and converges to ex situ collects optical fiber 103 end face; Raman signal enters nearly original position and collects optical fiber 102 and ex situ and collect optical fiber 103 and transfer to the other end, through cutoff filter 401 filtering Rayleigh scattering laggard enter spectrometer 400.
Controller 300 controls spectrometer 400 and samples after the motion of straight-line electric magnet valve, the raman spectral signal that nearly original position collection optical fiber 102 and ex situ collection optical fiber 103 gather shows successively over the display according to number order, (Binning is a kind of image readout mode to carry out Binning process to nearly in-situ Raman signal area and ex situ Raman signal region respectively, the electric charge that adjacent picture elements is responded to is added together, read with the pattern of a pixel), the Raman spectrum of fruits and vegetables epidermis and interior tissue can be obtained simultaneously, thus complete one-time detection process.
The portable Raman probe that the utility model provides and pick-up unit, by excitation fiber, nearly original position collection optical fiber, ex situ are collected optical fiber and be integrated in same portable Raman probe, the synchronous integrated achieving fruits and vegetables epidermis and internal information detects; Eliminating operating distance by arranging sample window, achieving contact Non-Destructive Testing, simplify light path adjustment process; Exposure and sampling process can be controlled easily by trigger key, add the convenience of detection.The utility model compact conformation, succinct, be easy to realize, be convenient to carry with, be more suitable for field and Site Detection.
Although describe embodiment of the present utility model by reference to the accompanying drawings, but those skilled in the art can make various modifications and variations when not departing from spirit and scope of the present utility model, such amendment and modification all fall into by within claims limited range.
Claims (10)
1. a portable Raman probe, is characterized in that, comprising: excitation fiber, some nearly original positions collect optical fiber, some ex situs collections optical fiber, interlayer, focus lens group, window and package casings, wherein:
Described some nearly original positions collect fiber optic loop around described excitation fiber;
Described interlayer is arranged on described some nearly original positions and collects around optical fiber, and for ex situ being collected optical fiber and nearly original position, to collect optical fiber spaced apart;
Described some ex situs collect fiber optic loop around described interlayer, and to collect optical fiber with described some nearly original positions be that donut is arranged;
Described focus lens group is arranged on described excitation fiber and collects one end of optical fiber, and it is centrally located on the central axis of described excitation fiber;
Described window is arranged on the side of described focus lens group away from described excitation fiber;
Described package casing is arranged on described some ex situs and collects around optical fiber, described focus lens group and described window, and for coated described excitation fiber, described some nearly original positions collect optical fiber and described some ex situs are collected optical fiber and fix described focus lens group and described window.
2. portable Raman probe according to claim 1, is characterized in that, also comprise trigger key, and described trigger key is arranged in described package casing, and its connection terminal place is provided with the wire that the central axial direction along described excitation fiber is arranged.
3. portable Raman probe according to claim 1, is characterized in that, the core diameter that any described nearly original position collection optical fiber and any described ex situ collect optical fiber is identical with numerical aperture.
4. portable Raman probe according to claim 3, is characterized in that, the core diameter that described nearly original position collection optical fiber and described ex situ collect optical fiber is 200 μm, and numerical aperture is 0.37.
5. portable Raman probe according to claim 1, is characterized in that, described package casing and described interlayer adopt identical material to make.
6. portable Raman probe according to claim 5, is characterized in that, described compartment thickness is 3mm.
7. portable Raman probe according to claim 1, is characterized in that, described focus lens group comprises collimation lens and convergent lens, wherein:
The planar side of described collimation lens is arranged on described excitation fiber and collects one end of optical fiber, and convex side is relative with the convex side of described convergent lens; Described convergent lens planar side is provided with described window.
8. portable Raman probe according to claim 7, is characterized in that, the distance d between the center of described collimation lens and the end face of described excitation fiber equals the focal length of this collimation lens; Distance d ' between the center of described convergent lens and described window equals the focal length of this convergent lens.
9. portable Raman probe according to claim 8, is characterized in that, the focal length of described collimation lens and described convergent lens is 10cm; Described distance d and described distance d ' is 10cm.
10. a portable detector, is characterized in that, comprising: portable Raman probe, controller, laser instrument and spectrometer described in claim 1 ~ 9 any one, wherein:
In described portable Raman probe excitation fiber away from one end of window by being connected with the tail optical fiber of described laser instrument after incident diaphragm shell fragment;
Described incident diaphragm shell fragment is controlled by the actuator be connected with described controller;
In described portable Raman probe, some nearly original positions are collected optical fiber and some ex situs and are collected optical fiber and be connected with described spectrometer away from one end of described window, and in described portable Raman probe, each root nearly original position collection optical fiber and each root ex situ collection optical fiber match away from the center of one end of window and the entrance slit of described spectrometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520877850.XU CN205120594U (en) | 2015-11-05 | 2015-11-05 | Portable raman probe and detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520877850.XU CN205120594U (en) | 2015-11-05 | 2015-11-05 | Portable raman probe and detection device |
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| Publication Number | Publication Date |
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| CN205120594U true CN205120594U (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520877850.XU Withdrawn - After Issue CN205120594U (en) | 2015-11-05 | 2015-11-05 | Portable raman probe and detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352934A (en) * | 2015-11-05 | 2016-02-24 | 北京农业智能装备技术研究中心 | Portable Raman probe and detection device |
| CN106596500A (en) * | 2016-11-15 | 2017-04-26 | 北京蓝色星语科技有限公司 | Raman spectrum system with adjustable space offset and Raman spectrum detection method |
-
2015
- 2015-11-05 CN CN201520877850.XU patent/CN205120594U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352934A (en) * | 2015-11-05 | 2016-02-24 | 北京农业智能装备技术研究中心 | Portable Raman probe and detection device |
| CN106596500A (en) * | 2016-11-15 | 2017-04-26 | 北京蓝色星语科技有限公司 | Raman spectrum system with adjustable space offset and Raman spectrum detection method |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20160330 Effective date of abandoning: 20190308 |