CN205941370U - Explosive identification apparatus based on raman spectroscopy technique - Google Patents
Explosive identification apparatus based on raman spectroscopy technique Download PDFInfo
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- CN205941370U CN205941370U CN201620758214.XU CN201620758214U CN205941370U CN 205941370 U CN205941370 U CN 205941370U CN 201620758214 U CN201620758214 U CN 201620758214U CN 205941370 U CN205941370 U CN 205941370U
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Abstract
The utility model provides an explosive identification apparatus based on raman spectroscopy technique, includes: laser instrument, collection branch road, beam split branch road, image sensor and controller, wherein: laser instrument, collection branch road and beam split branch road constitute continuous light path, and image sensor lies in the emitting light path of beam split branch road, and image sensor links to each other with the controller, the collection branch road includes: narrow band pass filter, collection mirror, speculum and raman light filter, wherein: the collection mirror is jeted into to the raman light filter after perpendicularly with the smooth signal reflection of narrow band pass filter outgoing to the speculum, the beam split branch road includes: follow focusing lens, speculum, slit, collimating mirror, grating and focusing mirror that the light path was arranged in proper order, wherein: slit, slit and collimating mirror parallel arrangement are jeted into perpendicularly with the light signal of focusing lens focus to the speculum, image sensor is kicked into perpendicularly to the emergent light of focusing mirror, and the controller even has a database, the prestore standard raman spectrogram of hazardous articles of database, the utility model discloses simple structure, the reliable operation, analysis speed is fast, and stability is high.
Description
Technical field
The utility model relates to a kind of technology in explosive detection field, specifically one kind are based on Raman spectroscopy
Explosive identification apparatus.
Background technology
Explosive is the important goal thing fought crime.Explosive, in modern society development, especially navigates in military field, aviation
Its field, infrastructure construction field and some industrial circles, have played extremely important effect.But with explosive application scope
The utility model opening up the wide, appearance of explosive new varieties and new explosive technology, the safety management problem of explosive becomes to get over
Come more serious.Therefore, develop the portable instrument of a kind of energy quick detection gasoline and other organic solvent, for quick detection
Doubtful combustibles, have certain realistic meaning.
The conventional detection technique of explosive includes at present：Ion mobility spectrometry, chemoluminescence method, thermal redox method, surface
Sonic method, chemical-agent technique, ultraviolet fluorescence method, mass spectrography and Canis animalss probe technique.Other side in addition to Canis animalss probe technique
Method is required to for sample and suspected explosive to take back laboratory tests, time-consuming and dangerous it is impossible to meet what investigation was handled a case
Need.In addition, personnel's close quarters such as airport, station, subway also lacks the quick detection equipment for explosive of indispensability, even if
There are such testing equipment, rate of false alarm and rate of failing to report also higher, therefore, developing quick, efficient, accurate explosive detection system is to carry
High safety of China prevention ability and criminal investigation handle a case in the urgent need to.
Raman spectrum is referred to as molecular fingerprint spectrum, can carry out accurate qualitative analyses to test substance.Therefore extensive
It is applied to the scientific research fields such as biology, material, environment, physics.With the development of Raman technology, its application expands further,
Including food safety, civilian sample material, drugs, the aspect such as explosive.Raman spectroscopy is applied to the detection of explosive, has taken
Obtained certain achievement it was demonstrated that the feasibility of technical method, it has following multiple advantage：Can be to portable explosive detector
Check frequency inorganic explosive carries out qualitative analyses；Noncontact mode is analyzed, and need not contact and prepare sample, sample will not be made
Become pollution and destroy；By plastic bag, the thin layer of the saturating laser such as glass just can be analyzed to sample, analyzes convenient test；
Use cost is low, in use lossless product；Analysis time is short, and the testing time of general sample is less than 10s；Analysis result
Accurately.
Although Raman spectroscopy has above advantage, not in the identification field large-scale application of explosive,
The factor mainly having following aspect constrains its application：Instrument cost is high, is unfavorable for popularizing；Equipment instrument is big, and weight is big, no
Beneficial to carrying, weaken its analysis time of short advantage；Instrument performance maintenance requirement is high, is unfavorable for bringing it to scene and carries out point
Analysis；Interpretation of result is difficult, and the final output result of Raman spectrometer is output in the form of spectrum, does not have skilled spectrum and divides
Analysis experience, is difficult to quickly reach a conclusion, is unfavorable for the popularization of Raman technology.With the progress of technical device, much external
Company is proposed small-sized or Portable Raman spectrometer, but is all for food safety, and pharmaceutical factory's raw material, adjuvant etc. are carried out
Design, is not directed to the police's application field and is designed and promotes.
Utility model content
This utility model cannot be distinguished by the defect with the blended explosive material of different collection of illustrative plates for prior art, proposes a kind of
Based on the explosive identification apparatus of Raman spectroscopy, collection branch road, light splitting are passed sequentially through by the Raman signal that will reflect back into
Branch road and imageing sensor, are converted to Raman spectrogram in the controller, compare with the normalized Raman spectrogram of data base, obtain
Sample compares analysis result with dangerous materials, accurate Rapid Detection dangerous materials.
This utility model is achieved through the following technical solutions：
This utility model includes：Laser instrument, collection branch road, light splitting branch road, imageing sensor and controller, wherein：Laser
Device, collection branch road and light splitting branch road constitute continuous light path, and imageing sensor is located on the emitting light path of light splitting branch road, image sensing
Device is connected with controller.
Described collection branch road includes：Narrow band pass filter, collection mirror, reflecting mirror and Raman optical filter, wherein：Reflecting mirror will
The optical signal of narrow band pass filter outgoing vertically injects collection mirror after reflexing to Raman optical filter.
Described narrow band pass filter is located on the emitting light path of laser instrument.
Described light splitting branch road includes：The condenser lenses that are sequentially arranged along light path, reflecting mirror, slit, collimating mirror, grating and
Focus lamp, wherein：The optical signal that condenser lenses focus on vertically is injected slit by reflecting mirror, and slit is be arranged in parallel with collimating mirror.
Described condenser lenses focus on the optical signal that Raman optical filter leaches.
The emergent light of described focus lamp vertically injects imageing sensor.
Described controller is connected with data base, the normalized Raman spectrogram of the dangerous materials that prestore in this data base.
Technique effect
Compared with prior art, volume of the present utility model is less than 30cm*20cm*7cm, and weight, less than 5kg, is easy to take
Band；And the normalized Raman spectrogram in data base can upgrade in time, today that chemosynthesis are quickly grown, be conducive to improving
The efficiency of identification and accuracy rate.
Brief description
Fig. 1 is schematic diagram of the present invention；
Fig. 2 is the normalized Raman spectrogram of different samples；
Fig. 3 is the Raman spectrogram of dinitrotoluene (DNT)；
Fig. 4 is the Raman spectrogram of papaverin hydrochloride；
In figure：1 is laser instrument, 2 is narrow band pass filter, 3 and 8 is reflecting mirror, 4 is Raman optical filter, 5 is collection mirror, 6 are
Sample, 7 be condenser lenses, 9 be slit, 10 be collimating mirror, 11 be grating, 12 be focus lamp, 13 be imageing sensor, 14 be control
Device processed, 15 be data base.
Specific embodiment
Below embodiment of the present utility model is elaborated, the present embodiment is being front with technical solutions of the utility model
Put and implemented, give detailed embodiment and specific operating process, but protection domain of the present utility model does not limit
In following embodiments.
Embodiment 1
As shown in figure 1, the present embodiment includes：Laser instrument 1, sample 6, collection branch road, light splitting branch road, imageing sensor 13,
Data base 15 and controller 14, wherein：Laser instrument 1, collection branch road and light splitting branch road constitute continuous light path, and laser instrument 1 sends
Laser is through collection branch road incidence sample 6, and passes through to gather the scattered signal that sample 6 collected by branch road, is carried out by light splitting branch road
Imageing sensor 13 is injected after light splitting；Imageing sensor 13 is connected with controller 14, and controller 14 is connected with data base 15.
Described laser instrument 1 includes but is not limited to 785nm or 830nm near infrared laser 1.
Described collection branch road includes：Narrow band pass filter 2, collection mirror 5, reflecting mirror 3 and Raman optical filter 4, wherein：Reflection
The optical signal of narrow band pass filter 2 outgoing is reflexed to and vertically injects collection mirror 5 after Raman optical filter 4 by mirror 3.
Described narrow band pass filter 2 is located on the emitting light path of laser instrument 1.
Described collection mirror 5 includes but is not limited to：12, the optical focus mirror such as lens, microcobjective, concave mirror.
Described collection mirror 5 focuses to optical signal on sample 6, and gathers the scattered signal of sample 6, and incident Raman filters
Piece 4.
Described Raman optical filter 4 can remove Rayleigh line and veiling glare, including but not limited to：High pass sideband optical filter, low
Logical sideband optical filter and trap piece.
Described light splitting branch road includes：The condenser lenses 7 that are sequentially arranged along light path, reflecting mirror 8, slit 9, collimating mirror 10,
Grating 11 and focus lamp 12, wherein：The optical signal that condenser lenses 7 focus on vertically is injected slit 9, slit 9 and collimation by reflecting mirror 8
Mirror 10 be arranged in parallel.
The emergent light of described focus lamp 12 vertically injects imageing sensor 13.
The optical signal of described focusing when slit 9 with slit 9 for signal source critical dimensions, through focal plane in slit
It is changed into directional light after 9 collimating mirror 10 and injects grating 11, the spectral signal including multiple wavelength is pressed different wave length by grating 11
Corresponding angle of diffraction order arranges diffraction and opens, and by focus lamp 12, the spectral signal of phase co-wavelength is focused on imageing sensor 13 phase
In same pixel.
The optical signal reaching optoelectronic induction face is converted to the signal of telecommunication by described imageing sensor 13, and the signal of telecommunication is carried out
Amplify, remove and make an uproar and Shape correction.
Described controller 14 controls the opening and closing of imageing sensor 13 shutter, and the signal of telecommunication of input is converted to Raman spectrogram
Carry out display to preserve.
As shown in Fig. 2 described data base 15 has the normalized Raman spectrogram of dangerous materials.
Described dangerous materials include common drugs and explosive, for emerging drugs or explosive, can pass through software
Increase its normalized Raman spectrogram in data base 15, and the title with affiliated sample, attribute and harm.
The normalized Raman spectrogram of the Raman spectrogram after changing and data base 15 is compared by described controller 14, display
Analysis result.
The factor of described comparison includes：The peak position of Raman spectrum, peak relative intensity and peak width.
As shown in Figure 3 and Figure 4, during work, laser launched by laser instrument 1, and the veiling glare of laser is filtered by narrow band pass filter 2,
After reflecting mirror 3 and Raman optical filter 4 adjustment light path, focused on sample 6 by gathering mirror 5；Collection mirror 5 collection sample 6
The signal of scattering, includes reflected light, Rayleigh scattering light and Raman diffused light, filters reflected light, Rayleigh through Raman optical filter 4 scattered
Penetrate light etc. with optical maser wavelength identical light, remaining Raman diffused light is useful signal, focuses on slit through condenser lenses 7
On 9, after collimating mirror 10 and grating 11 light splitting, imageing sensor 13 is focused to by focus lamp 12 and carry out photoelectric signal transformation；
The signal of telecommunication after imageing sensor 13 is changed by controller 14 is converted to Raman spectrogram and carries out preserving, shows, and with data base 15
Normalized Raman spectrogram compare, the factor of global alignment searches out immediate result in data base 15, and shows
Show Search Results and analysis result.
The factor of described comparison includes：The peak position of Raman spectrum, peak relative intensity and peak width.
Described analysis result includes：Whether the title of the affiliated sample of Search Results, attribute, be dangerous materials.
The present embodiment can go out species and the constituent of dangerous materials with precise Identification, thus being to be related to drugs, explosive
Dangerous materials provide accurate, reliable analysis result, need not prepare sample, analyze process automation, sample will not be polluted
And destruction.
Claims (7)
1. a kind of explosive identification apparatus based on Raman spectroscopy is it is characterised in that include：Laser instrument, collection branch road, point
Light branch road, imageing sensor and controller, wherein：Laser instrument, collection branch road and light splitting branch road constitute continuous light path, image sensing
Device is located on the emitting light path of light splitting branch road, and imageing sensor is connected with controller.
2. explosive identification apparatus according to claim 1, is characterized in that, described collection branch road includes：Narrow-band-filter
Piece, collection mirror, reflecting mirror and Raman optical filter, wherein：The optical signal of narrow band pass filter outgoing is reflexed to Raman filter by reflecting mirror
Collection mirror is vertically injected after mating plate.
3. explosive identification apparatus according to claim 2, is characterized in that, described narrow band pass filter is located at laser instrument
On emitting light path.
4. explosive identification apparatus according to claim 1, is characterized in that, described light splitting branch road includes：Along light path according to
The condenser lenses of secondary arrangement, reflecting mirror, slit, collimating mirror, grating and focus lamp, wherein：Condenser lenses are focused on by reflecting mirror
Optical signal vertically injects slit, and slit is be arranged in parallel with collimating mirror.
5. explosive identification apparatus according to claim 4, is characterized in that, described condenser lenses focus on Raman optical filter
The optical signal leaching.
6. explosive identification apparatus according to claim 4, is characterized in that, the emergent light of described focus lamp is vertically injected
Imageing sensor.
7. explosive identification apparatus according to claim 1, is characterized in that, the mark of described controller and built-in dangerous materials
The data base of quasi- Raman spectrogram is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620758214.XU CN205941370U (en) | 2016-07-19 | 2016-07-19 | Explosive identification apparatus based on raman spectroscopy technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620758214.XU CN205941370U (en) | 2016-07-19 | 2016-07-19 | Explosive identification apparatus based on raman spectroscopy technique |
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| CN205941370U true CN205941370U (en) | 2017-02-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109799221A (en) * | 2019-01-07 | 2019-05-24 | 北京青木子科技发展有限公司 | A kind of removable teaching Raman spectroscopy system and its control method |
| CN110554018A (en) * | 2018-05-31 | 2019-12-10 | 上海市刑事科学技术研究院 | Surface enhanced Raman material for detecting 4-bromomethcathinone in aqueous solution and preparation method thereof |
-
2016
- 2016-07-19 CN CN201620758214.XU patent/CN205941370U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110554018A (en) * | 2018-05-31 | 2019-12-10 | 上海市刑事科学技术研究院 | Surface enhanced Raman material for detecting 4-bromomethcathinone in aqueous solution and preparation method thereof |
| CN109799221A (en) * | 2019-01-07 | 2019-05-24 | 北京青木子科技发展有限公司 | A kind of removable teaching Raman spectroscopy system and its control method |
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