CN201732062U - Simple Raman remote explosive quick-detection device - Google Patents
Simple Raman remote explosive quick-detection device Download PDFInfo
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- CN201732062U CN201732062U CN2010202867850U CN201020286785U CN201732062U CN 201732062 U CN201732062 U CN 201732062U CN 2010202867850 U CN2010202867850 U CN 2010202867850U CN 201020286785 U CN201020286785 U CN 201020286785U CN 201732062 U CN201732062 U CN 201732062U
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Abstract
The utility model discloses a simple Raman remote explosive detecting instrument. The detecting instrument comprises a laser, a telescopic system, an optical fiber coupling device, an optical fiber beam splitter, optical filters, optical detectors and a data processing unit, wherein, the laser is used for irradiating the sample to be detected to produce Raman scattered light; the telescopic system is used for collecting the scattered light produced by the sample to be detected; the optical fiber coupling device is used for coupling the light collected by the telescopic system into an optical fiber; the narrowband optical filters are used for allowing the narrow bandwidth light that the to-be-detected explosive in the light transmitted from the optical fiber corresponds to; the optical detector that each narrowband filter corresponds to is used for detecting the light being filtered by the corresponding narrowband filter and producing detecting data; the data processing unit is used for processing the data outputted by the optical detectors, compares the data with the detection threshold set according to the experiment results and identifies if the characteristic of the hazardous substances, namely, the Raman spectrum is existed in the present signal; the light splitting unit is used for dispatching the beams transmitted by the optical fiber to each narrowband filter. The detecting instrument of the utility model has the capacity of detecting multiple explosives, has the advantages of low cost and small occupied space and can be effectively applied in detection of remote explosives.
Description
Technical field
The utility model relates to a kind of device for fast detecting of simple type Raman long-distance explosive.
Background technology
Nineteen twenty-eight India physicist Raman is found Raman scattering effect (promptly being changed by the light occurrence frequency of molecular scattering when light passes transparent medium) first and is therefore won the nineteen thirty Nobel Prize in physics.After Ramam effect was found, Raman spectrum analysis once was the main means of research molecular structure.In recent years, Raman spectroscopy has developed into confocal microscopy Raman technology, surface enhanced Raman technique, resonance raman technology etc., has formed the technical system in Raman spectrum analysis field.The Raman spectrum analysis technology is to be the molecular structure characterization technology that the basis is set up with the Ramam effect, and its signal source is relevant with rotation with the vibration of molecule.Therefore the different materials spectrum that takes on a different character can do qualitative analysis by Raman spectrum; According to the characteristics of substance spectra Raman scattering power, can do quantitative test to material; To the analysis of Raman spectrum bands of a spectrum, material functional group can be carried out and molecular structure performs an analysis.
Explosive is because its powerful destructive power belongs to the strict article of controlling in various countries.For security purposes such as public safeties, to carry out explosive detection be necessary for public place and other particular place at airport, station etc.Explosive generally is made of explosive, apparatus to cause bursting and filling material, wrappage etc.Explosive detection technology commonly used at present has explosive detection itself (as ion mobility spectrometry), and detection apparatus to cause bursting (as metal detection) is arranged, and also has detection of explosives shape (as the monoenergetic X-ray), and explosive detection and description of parcels (as the dual intensity X-ray) are simultaneously also arranged certainly.Wherein explosive detection has the branch of trace explosive and constant explosive detection, the trace explosive detection is to realize by analyzing steam that explosive evaporates or the blasting explosive granules that remains in body surface, and the required explosive of constant explosive detection has certain mass and volume, and modes such as general equivalent atom ordinal number by explosive, density, resemblance realize.Equipment based on these Detection Techniques commonly used often is suitable for closely using, and supervisory personnel and equipment is apart from checking that object is all closer, have or even the contact test mode, disguised poor, there are potential danger in personnel and equipment.Therefore, can guarantee the security of supervisory personnel and instrument, it is optimal also having concealed Detection Techniques simultaneously.Be applicable to that at present the technology that long-distance explosive is surveyed has technology such as the astigmatic image of the remote X back of the body, laser spectrum, thermal imaging, Terahertz and millimeter wave, their detection principle, technology maturity and applicable situation all also there are differences, but generally speaking all also be in the transformation stage of testization to commercialization, the cost of prior art productsization all also is in a higher stage at present, can not be widely used.
Can absorb or launch the laser of some specific wavelength when explosive steam or explosive are subjected to laser radiation, these absorptions or emission spectrum have fingerprint characteristic, just can judge whether there is explosive with former library of spectra comparison.Laser spectrum tech with long-range detection ability mainly contains Raman spectrum, laser-induced fluorescence spectroscopy and optoacoustic spectroscopy etc.Because laser has better transmission performance, is particularly suitable for long-range detection.The Raman spectrum analysis technology is to be the molecular structure characterization technology that the basis is set up with the Ramam effect, and its signal source is relevant with rotation with the vibration of molecule.Therefore the different materials spectrum that takes on a different character can do qualitative analysis by Raman spectrum; According to the characteristics of substance spectra Raman scattering power, can do quantitative test to material; To the analysis of Raman spectrum bands of a spectrum, material functional group can be carried out and molecular structure performs an analysis.Just because of this, the laser Raman spectroscopy technology has all obtained using widely in material evaluation, molecular structure research, chemical process, medical science medicine, biological chemistry, archaeology and every field such as jewel evaluation, public security and science of law sample analysis, anti-terrorism technology, food security, geology and environmental science, more and more is subjected to researcher's attention.Particularly the laser Raman spectroscopy analytical technology need not the specimen preparation process, is the lossless detection technology, is fit to aqueous solution analysis, the fast stability height of speed, progressively begins to use in anti-terrorism prohibition of drug field.
Application number is the Chinese patent literature of 9519564.X disclosed " detecting device of explosive ", is used for the test sample explosive materials, comprising: a light source is used for this sample is shone to produce Raman diffused light; A detecting device is used to detect the Raman diffused light from sample reception; And the narrowband light filter between sample and detecting device, this light filter only allows and comprises 874cm
-1And 885cm
-1Certain arrowband in light by and arrive detecting device.This equipment can only be used for contact and detect, and detection efficiency is low, and can only be directed to characteristic peak at 880cm
-1About explosive, as RDX, PETN etc.
Other use a kind of universal remote Raman detection equipment of laser resonant Raman technology, can realize remote detection to explosive, but this checkout equipment has used ccd formula spectrometer equipment, system cost is relatively costly, therefore in a lot of fields or the place, can't promote the use of by the restriction of economic condition.
The utility model content
In order to solve the deficiencies such as maybe can not realizing remote detection that involves great expense that existing explosive detection apparatus has, the purpose of this utility model has been to provide the device for fast detecting of the simple type Raman long-distance explosive that a kind of cost is low, volume is little.
The technical solution adopted in the utility model is: a kind of device for fast detecting of simple type Raman long-distance explosive, described pick-up unit comprises
Laser instrument is used to shine detected sample to produce Raman diffused light;
Telescopic system is used to collect the scattered light that testing sample produces;
Fiber coupling device is used for the optically-coupled that telescopic system is collected is entered optical fiber;
A plurality of narrow band filters, the light that is used for optical fiber is transmitted only remain the narrow bandwidth of light of explosive detection correspondence to be passed through;
The photo-detector of each narrow band filter correspondence is used to survey the corresponding filtered light of narrow band filter, and produces detection data;
Data processing unit is used for the data processing to photo-detector output, compares according to the detection threshold of setting with experimental result, whether judges in the current demand signal feature Raman spectrum of dangerous product;
Spectrophotometric unit is used for the light beam of Optical Fiber Transmission is assigned to described each narrow band filter.
Described spectrophotometric unit can be for being divided into light the light beam of corresponding narrow band filter quantity and passing to the fiber optic splitter of narrow band filter.
Described spectrophotometric unit also can switch photoswitch to the tape controller of each narrow band filter with light beam order poll for being used for.
Described narrow band filter and corresponding photo-detector are three, and the wave number of the centre wavelength of described three narrow band filter correspondences is respectively 880cm
-1, 1050cm
-1And 1350cm
-1, filter bandwidht is ± 10cm
-1
Described laser instrument is the semiconductor solid state laser of 532nm-735nm wavelength.
Described telescopic system is Schmidt-Cassegrain or Maksutov-Cassegrain's formula catadioptric telescope.
What described detector adopted is the photodetector of magnetic tape trailer fibre.
The beneficial effects of the utility model are: this product principle is remote Raman technology, be used for suspicious explosive is carried out remote Rapid identification, need not contact detection, can be effectively applied to the use that long-distance explosive is surveyed, reaction time only is several seconds, can differentiate fast whether suspicious item is inflammable explosive article, it is in extensive range to detect explosive, comprises explosive, explosive precursor chemical, self-control explosive, mixes self-control explosive etc.And possessing the advantage of low cost, small size, this equipment can be used for the explosive monitoring of public arena.
Description of drawings
Fig. 1 is the synoptic diagram of a kind of embodiment of the utility model;
Fig. 2 is the synoptic diagram of the another kind of embodiment of the utility model.
Embodiment
The device for fast detecting of a kind of simple type Raman long-distance explosive that the utility model is provided below in conjunction with accompanying drawing is described in further detail:
Embodiment 1
Be a kind of device for fast detecting of simple type Raman long-distance explosive as shown in Figure 1, this pick-up unit comprises laser instrument 2, is used to shine detected sample 1 to produce Raman diffused light; Telescopic system 3 is used for collecting at a distance the scattered light that testing sample 1 produces; Fiber coupling device 5 is used for the optically-coupled that telescopic system 3 is collected is entered optical fiber 4; 3 narrow band filters 7 are used for the narrow bandwidth of light of explosive detection correspondence of only remaining that optical fiber transmits is passed through, and other light filters out; The photo-detector 8 of 3 narrow band filter correspondences is used to survey corresponding narrow band filter 7 filtered light, and produces detection data; Data processing unit 9 is used for the data processing to photo-detector output, compares according to the detection threshold of setting with experimental result, whether judges in the current demand signal feature Raman spectrum of dangerous product; , be used for the light beam of Optical Fiber Transmission is assigned to described each narrow band filter 7 as spectrophotometric unit by fiber optic splitter 6.
Wherein, as shown in Figure 1, laser instrument 2 is the semiconductor solid state laser of 532nm-735nm wavelength, telescopic system 3 is Maksutov-Cassegrain's formula catadioptric telescope, spectrophotometric unit adopts fiber optic splitter 6, with light beam mean allocation to three narrow band filter 7 of Optical Fiber Transmission, the parasitic light of elimination Reyleith scanttering light and other wavelength effectively, the wave number of the centre wavelength of the correspondence of three narrow band filters 7 is respectively 880cm
-1, 1050cm
-1And 1350cm
-1, filter bandwidht is ± 10cm
-1, each narrow band filter 7 respectively corresponding photo-detectors 8 in addition, what photo-detector 8 adopted is the photodetector of magnetic tape trailer fibre, three photo-detectors 8 are used for detection feature peak 884cm respectively
-1RDX, R791, R852 and characteristic peak are at 874cm
-1Plastic explosives such as PETN, characteristic peak is at 1350cm
-1Neighbouring nitrogen dioxide base explosive and dangerous material, as: picric acid; CE; TNT; 2# rock type explosive, and characteristic peak is at 1050cm
-1About nitro category explosive, as urea nitrate, ammonium nitrate fuel oil mixture, ammonium nitrate, slurry explosive etc.
The course of work is: laser instrument 2 irradiation detected samples 1 make it produce scattered light, telescopic system 3 is collected scattered light and is passed to fiber optic splitter 6 by optical fiber 4, the light that fiber optic splitter 6 will be collected is divided into multichannel, every road light is surveyed by photo-detector 8 through optical filter 7 again, the output signal of photo-detector enters data processing unit 9 after A/D converter converts digital quantity to, handle by 9 pairs of output datas of data processing unit, whether judge in the current demand signal feature Raman spectrum of dangerous product A/D converter.Adopt telescopic system to carry out remote Raman detection, therefore not only quick but also safe.
Embodiment 2
As shown in Figure 2, the synoptic diagram of another kind of embodiment of the present utility model, comprise laser instrument 2, telescopic system 3, fiber coupling device 5,7,3 photo-detectors 8 of 4,3 optical filters of optical fiber, wherein, spectrophotometric unit adopts photoswitch 10, described laser instrument 2 irradiation detected samples 1 make it produce scattered light, described telescopic system 3 is collected scattered lights and is passed to light by optical fiber and opens the light 10, and the controller of photoswitch 10 provides a control signal and allows photoswitch 10 switch to one of them wave filter to survey.
Adopt photoswitch with the difference of first kind of embodiment, control detector is surveyed the wave filter of appointment.Be when the light beam that collects arrives photoswitch, the photoswitch controller provides a control signal and allows photoswitch switch to given filter to survey, and the mode of optical switch control signal employing order poll is carried out.This structure is 3 times of scheme 1 on detection time, but can reduce intrasystem optical loss effectively.
Detector of the present utility model possesses multiple explosive detection ability, and possesses low cost, the advantage that volume is little.
Claims (10)
1. the device for fast detecting of a simple type Raman long-distance explosive is characterized in that described pick-up unit comprises:
Laser instrument is used to shine detected sample to produce Raman diffused light;
Telescopic system is used to collect the scattered light that testing sample produces;
Fiber coupling device is used for the optically-coupled that telescopic system is collected is entered optical fiber;
A plurality of narrow band filters, the light that is used for optical fiber is transmitted only remain the narrow bandwidth of light of explosive detection correspondence to be passed through;
The photo-detector of each narrow band filter correspondence is used to survey the corresponding filtered light of narrow band filter, and produces detection data;
Data processing unit is used for the data processing to photo-detector output, compares according to setting detection threshold with experimental result, whether judges in the current demand signal feature Raman spectrum of dangerous product;
Spectrophotometric unit is used for the light beam of Optical Fiber Transmission is assigned to described each narrow band filter.
2. pick-up unit according to claim 1 is characterized in that: described spectrophotometric unit is for being divided into light the fiber optic splitter of corresponding narrow band filter quantity way.
3. pick-up unit according to claim 1 is characterized in that: described spectrophotometric unit is to be used for light beam order poll is switched photoswitch to the tape controller of each narrow band filter.
4. according to described detector one of in the claim 1 to 3, it is characterized in that: described narrow band filter and corresponding photo-detector are three, and the wave number of the centre wavelength of the correspondence of described three narrow band filters is respectively 880cm
-1, 1050cm
-1And 1350cm
-1, filter bandwidht is ± 10cm
-1
5. according to described detector one of in the claim 1 to 3, it is characterized in that: described laser instrument is the semiconductor solid state laser of 532nm-735nm wavelength.
6. detector according to claim 4 is characterized in that: described laser instrument is the semiconductor solid state laser of 532nm-735nm wavelength.
7. according to described detector one of in the claim 1 to 3, it is characterized in that: described telescopic system is Schmidt-Cassegrain or Maksutov-Cassegrain's formula catadioptric telescope.
8. detector according to claim 4 is characterized in that: described telescopic system is Schmidt-Cassegrain or Maksutov-Cassegrain's formula catadioptric telescope.
9. detector according to claim 5 is characterized in that: described telescopic system is Schmidt-Cassegrain or Maksutov-Cassegrain's formula catadioptric telescope.
10. according to described detector one of in the claim 1 to 3, what it is characterized in that its detector adopts is the photodetector of magnetic tape trailer fibre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202867850U CN201732062U (en) | 2010-08-10 | 2010-08-10 | Simple Raman remote explosive quick-detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202867850U CN201732062U (en) | 2010-08-10 | 2010-08-10 | Simple Raman remote explosive quick-detection device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915757A (en) * | 2010-08-10 | 2010-12-15 | 北京路源光科技有限公司 | Simple rapid detection device of Raman long-distance explosive |
| CN103516424A (en) * | 2012-06-26 | 2014-01-15 | 波音公司 | Optical coupler testing system |
| CN109342399A (en) * | 2018-11-21 | 2019-02-15 | 四川出入境检验检疫局检验检疫技术中心 | The fire-proof and explosion-proof protective device of Raman spectrometer measurement inflammable explosive article |
| CN114034641A (en) * | 2021-12-08 | 2022-02-11 | 重庆大学 | Narrow-band filter-based Raman on-chip detection system and method |
-
2010
- 2010-08-10 CN CN2010202867850U patent/CN201732062U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915757A (en) * | 2010-08-10 | 2010-12-15 | 北京路源光科技有限公司 | Simple rapid detection device of Raman long-distance explosive |
| CN103516424A (en) * | 2012-06-26 | 2014-01-15 | 波音公司 | Optical coupler testing system |
| CN103516424B (en) * | 2012-06-26 | 2017-08-15 | 波音公司 | Photo-coupler test system |
| CN109342399A (en) * | 2018-11-21 | 2019-02-15 | 四川出入境检验检疫局检验检疫技术中心 | The fire-proof and explosion-proof protective device of Raman spectrometer measurement inflammable explosive article |
| CN109342399B (en) * | 2018-11-21 | 2024-04-09 | 四川出入境检验检疫局检验检疫技术中心 | Fireproof and explosion-proof protection device for measuring inflammable and explosive products by Raman spectrometer |
| CN114034641A (en) * | 2021-12-08 | 2022-02-11 | 重庆大学 | Narrow-band filter-based Raman on-chip detection system and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110202 Termination date: 20110810 |