CN207764388U - Active continuous wave Terahertz human body cache detection device - Google Patents
Active continuous wave Terahertz human body cache detection device Download PDFInfo
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- CN207764388U CN207764388U CN201820112104.5U CN201820112104U CN207764388U CN 207764388 U CN207764388 U CN 207764388U CN 201820112104 U CN201820112104 U CN 201820112104U CN 207764388 U CN207764388 U CN 207764388U
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- human body
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- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 238000005516 engineering process Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 abstract description 2
- 239000013078 crystal Substances 0.000 description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 description 8
- 239000004615 ingredient Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- -1 medical diagnosis Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 239000012491 analyte Substances 0.000 description 4
- 239000003814 drug Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000000265 homogenisation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000013019 agitation Methods 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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Abstract
The utility model is related to field of safety check, specifically provide a kind of active continuous wave Terahertz human body cache detection device.Its structure includes at least two terahertz sources sources, plus lens, terahertz detector and control system, image procossing and display module are built-in in the control system, plus lens and terahertz detector are arranged in human body side to be detected, at least two terahertz sources source distribution are arranged between human body to be detected and plus lens, and the terahertz signal of terahertz sources source transmitting is after the reflection of human body cache to be detected, terahertz detector surface is imaged in through plus lens, the terahertz detector is connect with image procossing and display module.Compared with prior art, the active continuous wave Terahertz human body cache detection device of the utility model has the characteristics that low cost, detection efficiency height, performance are stablized, and can be widely used in the fields such as Passenger Transport Security Inspection, meeting safety check, factory's entrainment detection.
Description
Technical field
The utility model is related to field of safety check, specifically provide a kind of hiding analyte detection dress of active continuous wave Terahertz human body
It sets.
Background technology
THz wave is the electromagnetic wave that frequency is 0.1-1THZ ranges, and frequency is answered between microwave and infrared ray
Field includes：Many aspects such as industrial nondestructive testing, material, medical diagnosis, air and environmental monitoring, communication.Due to too
Hertz wave can penetrate most apolar substances such as：Leather, fabric, paper, therefore, in carrying out human body and hiding analyte detection
Without searching the person, the cache of human body just can be detected, using wide in human body hides analyte detection.Existing Terahertz safety check apparatus master
It has the following disadvantages：One, the ingredient of cache cannot be detected, the contrabands such as explosive, drugs cannot detect in time；
Two, using time-domain spectroscopy scanning technique, it is rectangular area of the area with respect to human body very little to emit to the terahertz emission face of human body,
It needs to realize by above-mentioned terahertz emission Surface scan Whole Body to be detected Whole Body, this scanning process consumption
Time-consuming, the complete human body surface of surface sweeping needs several hours, it is difficult to meet the needs of safety check；Three, the producing method of terahertz emission
Method, semiconductor photosensitive antenna or terahertz light electric diode based on photomixing are generated for quantum cascade laser, on the one hand, too
Hertzion radiation energy is low, and in microwatt magnitude, on the other hand, quantum cascade laser generates Terahertz method needs and freezed
Journey limits application of the Terahertz in reality；Four, the terahertz signal that human body is reflected back, cost are collected with metallic mirror
Height, installation accuracy is high, is not easy to practical application.
Invention content
The utility model is in view of the above shortcomings of the prior art, to provide that a kind of low cost, detection efficiency be high, performance is stablized
Active continuous wave Terahertz human body cache detection device.
Technical solution adopted by the utility model to solve its technical problems is：Active continuous wave Terahertz human body is hidden
Analyte detection device, including at least two terahertz sources sources, plus lens, terahertz detector and control system, the control
Image procossing and display module are built-in in system, plus lens and terahertz detector are arranged in human body side to be detected, until
Few two terahertz sources source distribution are arranged between human body to be detected and plus lens, and the terahertz of terahertz sources source transmitting
Hereby signal images in terahertz detector surface, the Terahertz after the reflection of human body cache to be detected through plus lens
Detector is connect with image procossing and display module.
The terahertz detector is preferably the real-time terahertz detector of high speed, resolution ratio 0.5-1mm, for real-time
Imaging.
It is embedded with article Terahertz reflection characteristic database in described image processing and display module.The database is root
The difference of the reflection-absorption characteristic of terahertz signal is established according to different material.Image procossing and display module pass through than logarithm
According to the terahertz signal that library and substance are reflected back, the ingredient of article is determined, while the ingredient of object being presented in real time.For fried
The contrabands such as medicine, drugs can Realtime Alerts, prompt security staff.
In order to preferably realize that the body scan of human body to be detected, above-mentioned detection device further include revolving-turret, the rotation
Platform of walking around is used to support and drives human body rotating to be detected.
Revolving-turret can be electrically connected with control system, and rotary speed can be controlled by control system, and and image
The processing speed of processing and display module synchronizes, preferably 120 °/s.
Preferably, 4-6 terahertz sources source is evenly distributed between human body and plus lens to be detected, to ensure
Even swept area can cover entire human body surface.For example, being arranged in 4 terahertz sources sources in human body to be detected and plus lens
Between same facade in, and be located at the top, lower section, left and right side of plus lens.
Preferably, waveguide and diversing lens, terahertz sources can be arranged in terahertz sources source signal transmitting terminal
The terahertz signal of source transmitting is after waveguide and diversing lens shaping homogenization, uniform irradiation human body to be detected.The waveguide
Pipe is metal material, for realizing THz wave high reflectance and launch the Shape correction of Terahertz waveform.The transmitting
Lens are polytetrafluoroethylene (PTFE) or High Resistivity Si planoconvex spotlight, for carrying out Homogenization Treatments, focus position to transmitting terahertz signal
Setting in waveguide tube signals output.
Preferably, the terahertz sources source uses the external chamber surface-emitting laser of two-way light.More specifically, terahertz
Hereby emission source is preferably using two-way incident laser, respectively near-infrared laser, Submillineter Wave Technology, the near-infrared laser wavelength
808nm, the Submillineter Wave Technology wavelength is preferably 1080nm.Two-way laser continuous agitation nonlinear crystal generates continuous wave terahertz
It hereby radiates, the THz wave of generation is continuous wave without time domain delay.By electromagnetic field in high cycle by the mould of two kinds of laser
Formula is limited in nonlinear crystal, and the outgoing Terahertz energy of 20-100 milliwatts is generated with this.
The nonlinear crystal material is to mix MgO niobates nonlinear crystals.
The plus lens is two-piece type achromatic lens, and material is polytetrafluoroethylene (PTFE) or High Resistivity Si, for terahertz
Hereby signal carries out convergence and anaberration processing.
Compared to the prior art, the active continuous wave Terahertz human body cache detection device of the utility model have with
Under advantageous effect outstanding：
One, the terahertz emission face of multiple terahertz sources sources transmitting can cover human body whole surface to be detected, therefore nothing
The progressive scan to human body need to be carried out, the terahertz signal by receiving the reflection of human body cache can be imaged real-time, be examined
It surveys efficient；
Two, the efficient convergence collection that terahertz signal is realized with plus lens, without using metallic mirror, low cost,
Anti-corrosion dirt exclusion capabilities are strong, are conducive to the popularization and application of the device；
Three, it is provided with revolving-turret, is easy to implement the whole body detection to human body, it is simple in structure, and further improve inspection
Survey efficiency.
Description of the drawings
Attached drawing 1 is the structural schematic diagram of the active continuous wave Terahertz human body cache detection device of the utility model；
Attached drawing 2 is the office of the cloth of active continuous wave Terahertz human body cache detection device terahertz signal source shown in Fig. 1
Schematic diagram；
Attached drawing 3 is terahertz sources source structure in active continuous wave Terahertz human body cache detection device shown in Fig. 1
Schematic diagram.
Specific implementation mode
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, but not as to the utility model
Restriction.
A most preferred embodiment is given below：
As shown in Fig. 1, the active continuous wave Terahertz human body cache detection device of the utility model is mainly by too
Hertz emission source 1, waveguide（Metal material）2, diversing lens（Polytetrafluoroethylene (PTFE) planoconvex spotlight）3, plus lens（Two-piece type disappears
Aberration lens, polytetrafluoroethylene (PTFE) material）4, terahertz detector（Resolution ratio 0.5-1mm）5,7 structure of control system 6 and revolving-turret
At.Terahertz sources source 1, waveguide 2, diversing lens 3, plus lens 4, terahertz detector 5 are assemblied in revolving-turret 7
Side.Control system 6 is built-in with image procossing and display module.Terahertz detector 5, revolving-turret 7 connect with control system 6
It connects.
Terahertz sources source 1, waveguide 2, diversing lens 3 constitute one group of terahertz signal source A.Wherein, waveguide 2 is fixed
Signal transmitting terminal in terahertz sources source 1, the focal position of diversing lens 3 are located at the signal output end of waveguide 2.Four groups too
Hertz signal source A is assemblied in the same facade between human body 8 and plus lens 4 to be detected, and is located at plus lens 4
Top, lower section, left and right side（As shown in Fig. 2）.
Revolving-turret 7 is electrically connected with control system 6, and rotary speed is 120 °/s, is used to support and drives to be detected
Human body 8 rotates.
As shown in Fig. 3, the terahertz sources source 1, hardware configuration and terahertz sources source in the prior art phase
Together, difference lies in the present embodiment terahertz sources sources to use two-way incident laser, is the near-infrared laser that wavelength is 808nm respectively
With the Submillineter Wave Technology that wavelength is 1080nm.Two-way laser through reflector 11, surface reflection chip 12, calibrator 13, cloth scholar this
Special window 14, reflector 15 reach nonlinear crystal 16, and continuous agitation nonlinear crystal 16 generates continuous wave terahertz emission, generates
THz wave without time domain delay be continuous wave.The pattern of two kinds of laser is limited to by electromagnetic field in high cycle non-thread
In property crystal 16, the outgoing Terahertz energy of 20-100 milliwatts is generated with this.The nonlinear crystal 16 is non-to mix MgO niobates
Linear crystal.
The terahertz signal of THz source emission source 1 turns rotation by the shaping homogenization of waveguide 2, diversing lens 3
8 surface of human body to be detected on platform 7 carries out uniform irradiation.The terahertz signal of human body cache reflection is by plus lens 4
Convergence and anaberration processing, on 5 surface of terahertz detector, the image information of acquisition by image procossing and is shown real time imagery
Show that module real time imagery, the image of object can be clearly presented.Meanwhile image procossing and display module by comparison data library and
The terahertz signal that substance is reflected back determines the ingredient of article, and the ingredient of object is presented in real time.Explosive, drugs etc. are disobeyed
Contraband goods Realtime Alerts prompt security staff.
Claims (8)
1. active continuous wave Terahertz human body cache detection device, it is characterised in that：Including at least two terahertz sources
Source, plus lens, terahertz detector and control system are built-in with image procossing and display module in the control system, converge
In human body side to be detected, at least two terahertz sources source distribution are arranged to be detected for poly- lens and terahertz detector setting
Between human body and plus lens, and terahertz sources source transmitting terahertz signal after the reflection of human body cache to be detected,
Terahertz detector surface is imaged in through plus lens, the terahertz detector is connect with image procossing and display module.
2. active continuous wave Terahertz human body cache detection device according to claim 1, which is characterized in that also wrap
Revolving-turret is included, the revolving-turret is used to support and drives human body rotating to be detected.
3. active continuous wave Terahertz human body cache detection device according to claim 2, which is characterized in that rotation
The rotary speed of turntable is 120 °/s.
4. active continuous wave Terahertz human body cache detection device according to claim 1 or 2, which is characterized in that
4-6 terahertz sources source is evenly distributed between human body and plus lens to be detected.
5. active continuous wave Terahertz human body cache detection device according to claim 4, which is characterized in that terahertz
Hereby transmitting source signal transmitting terminal is provided with waveguide and diversing lens, and the terahertz signal of terahertz sources source transmitting is through waveguide
After being homogenized with diversing lens shaping, uniform irradiation human body to be detected.
6. active continuous wave Terahertz human body cache detection device according to claim 5, which is characterized in that terahertz
Hereby emission source uses two-way incident laser, respectively near-infrared laser, Submillineter Wave Technology.
7. active continuous wave Terahertz human body cache detection device according to claim 6, which is characterized in that described
The wavelength of near-infrared laser is 808nm, and the Submillineter Wave Technology wavelength is 1080nm.
8. active continuous wave Terahertz human body cache detection device according to claim 1 or 2, which is characterized in that
The plus lens is two-piece type achromatic lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820112104.5U CN207764388U (en) | 2018-01-23 | 2018-01-23 | Active continuous wave Terahertz human body cache detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820112104.5U CN207764388U (en) | 2018-01-23 | 2018-01-23 | Active continuous wave Terahertz human body cache detection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109471195A (en) * | 2018-12-29 | 2019-03-15 | 同方威视技术股份有限公司 | Millimeter wave terahertz imaging equipment and object identification classification method |
| CN109581530A (en) * | 2018-12-28 | 2019-04-05 | 同方威视技术股份有限公司 | Portable Terahertz rays safety detection apparatus |
| CN113418891A (en) * | 2021-07-14 | 2021-09-21 | 青岛大学 | Terahertz ground detection system for detecting safety of bottom of vehicle and detection method thereof |
-
2018
- 2018-01-23 CN CN201820112104.5U patent/CN207764388U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581530A (en) * | 2018-12-28 | 2019-04-05 | 同方威视技术股份有限公司 | Portable Terahertz rays safety detection apparatus |
| CN109471195A (en) * | 2018-12-29 | 2019-03-15 | 同方威视技术股份有限公司 | Millimeter wave terahertz imaging equipment and object identification classification method |
| CN109471195B (en) * | 2018-12-29 | 2023-11-10 | 同方威视技术股份有限公司 | Millimeter wave terahertz imaging device and object identification and classification method |
| CN113418891A (en) * | 2021-07-14 | 2021-09-21 | 青岛大学 | Terahertz ground detection system for detecting safety of bottom of vehicle and detection method thereof |
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