CN109633773A - The passive superconduction Terahertz human body security check system of 220GHz - Google Patents
The passive superconduction Terahertz human body security check system of 220GHz Download PDFInfo
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- CN109633773A CN109633773A CN201811599719.6A CN201811599719A CN109633773A CN 109633773 A CN109633773 A CN 109633773A CN 201811599719 A CN201811599719 A CN 201811599719A CN 109633773 A CN109633773 A CN 109633773A
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- G—PHYSICS
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
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Abstract
The invention discloses a kind of passive superconduction Terahertz human body security check systems of 220GHz, are related to human body safety check instrument technical field.The system introduces time-multiplexed concept on the basis of existing safe examination system, and the number of superconducting quantum interference device is reduced by being time-multiplexed, and makes each SQUID device while can support to read the electric current of four transition edges sensors.By introducing switching device of the GaN HEMT modulator as Terahertz, realize that the response to TES device carries out switch control；The use number of SQUID device can be reduced, therefore reduces system cost.
Description
Technical field
The present invention relates to human body safety check instrument technical field more particularly to a kind of passive superconduction Terahertz human body safety checks of 220GHz
System.
Background technique
THz wave refers to electromagnetic wave of the frequency within the scope of 100GHz-10THz, high-end, the submillimeter wave with millimeter wave
And far infrared is overlapped, in macroelectronics to the excessive field of microcosmic photonics.THz wave is in electromagnetic spectrum
Occupy very special position.Terahertz is a kind of radiation source that is new, having many particular advantages；Terahertz Technology be one very
Important intersection Disciplinary Frontiers provide a very tempting opportunity to technological innovation, the national economic development and national security.
THz wave naturally has to nonmetallic and apolar substance penetrability, is highly suitable for detecting human body, detects human skin
And the various dangerous material hidden among clothes.THz wave has human safety simultaneously, this is because the light of THz wave
Sub- energy is very small, not will cause the injury of ionization property to human body cell, is safe to human body.Compared to the microwave and millimeter wave of low frequency
Frequency range, THz wave wavelength is shorter, hereby has high-resolution characteristic.Many substances have fingerprint spectral property in terahertz wave band,
Similar to the fingerprint of people, substance non-damage drive and detection can be applied to.In the numerous applications of Terahertz, ceased at present with human lives
Ceasing relevant is exactly Terahertz safety check technology.Terahertz human body safety check technology be using THz wave to ordinary clothing material (cotton,
Fiber crops, chemical fibre etc.) special penetrability, the blank in human body safety check field has been filled up, has been the important benefit to current human's safety check means
It fills.
Currently used safety detection means are metal detection door and X-ray machine, and metal detections can not be detected effectively except gold
Contraband outside category, typical dangerous material can not visited (sintex, free-flowing dynamite, liquid explosives, gasoline, diesel kerosene), elicited
Out be not dangerous material (mobile phone, steel Beng, key, metal toiletry), X-ray, can be thin to human body since its photon energy is too big
Born of the same parents cause the injury of ionization property, and human body harmfulness is very big.America and Europe has disabled at present.Therefore Terahertz safety check has very big potential market
Value.
The safe examination system of THz wave is broadly divided into two major classes at present, and one kind is passive type safe examination system, and one kind is actively
Formula safe examination system.Passive type safety check feature: first is that it is non-contact, without searching the person, respect tested personnel's individual privacy；Second is that detection effect
Rate is high, and speed is fast, without stop, and tested personnel normal walking in specified security check passage is mentioned significantly by that can complete safety check
High safety check efficiency；Third is that safety is radiationless, similar ordinary camera, monitoring camera do not generate electromagnetism, ionising radiation, to people
Body is harmless.The disadvantage is that resolution ratio is not high, signal-to-noise ratio is not high.Active safe examination system is the milli by actively emitting doses
Metric wave/THz wave (can receive in range of doses), human body be imaged, for passive type safety check instrument, signal-to-noise ratio is higher.
Though there is certain dose of radiation, since millimeter wave/Terahertz photon energy is small, ionization property wound will not be caused to human body cell
Evil.It is currently used main by system, mostly it is to be worked based on room temperature microelectronic component, there is fogging image mostly, acquires
Rate is not high enough, is unable to real time imagery, needs could be imaged within 3 to 5 seconds.
At present the Terahertz safe examination system of passive type with its it is radiationless be easier to be received by general public, therefore the type
Passive type safe examination system obtained significant progress.Passive type Terahertz safe examination system safety check distance more mature at present exists
0.5m to 25m distance.Can be realized the safe examination system of 25m detection range using low-temperature superconducting quantum device as core devices come
Realize the remote probe to human body concealment article.
At present in the Terahertz safe examination system of superconductor, (TES) device and work are sensed using the transition boundary of horizontal array
For superconductive device of the superconducting quantum interference device (SQUID) as core of TES reading circuit, to realize to human body terahertz signal
Detection.Currently used horizontal array is generally 64 and 128, that is, needs 64 or 128 TES and SQUID device,
In both devices, the complex manufacturing technology of SQUID device ratio TES device, cost is higher.
Summary of the invention
The technical problem to be solved by the present invention is to how provide use number, the drop that one kind can reduce SQUID device
The passive superconduction Terahertz human body security check system of the 220GHz of low system cost.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of passive superconduction Terahertz of 220GHz
Human body security check system, it is characterised in that: including human body safety check instrument ontology, the human body safety check instrument ontology includes several low noises
Amplifier, each low-noise amplifier connect through the signal input part of a GaN HEMT modulator and a transition edges sensor
It connects, the signal output end of every four transition edges sensors is connect with the signal input part of a superconducting quantum interference device, described
The working frequency of low-noise amplifier is 220GHz, the output end of superconducting quantum interference device and the signal input part of control computer
Connection receives human body terahertz emission by electromagnetic horn and low-noise amplifier, and amplifies to it, then successively controls
The corresponding four GaN HEMT modulator conducting of each superconducting quantum interference device, realizes that the response to transition edges sensor carries out
Switch control, superconducting quantum interference device is sequentially received the information of transition edges sensor transmission, and carries out to received information
The current signal that transition edges sensor acquires is read and amplified after processing, generates the voltage letter that can carry out electricity processing
Number, voltage signal is sent into control computer after data acquire, and forms the terahertz of human body on a display screen of the control computer
Hereby image.
A further technical solution lies in: the human body safety check instrument ontology further includes rack, is provided with arteries and veins in the rack
Punching cooler, control computer, principal reflection mirror and subreflector, the principal reflection mirror are oppositely arranged with the subreflector, institute
It states principal reflection mirror and subreflector is used to converge the THz wave of human body generation.
A further technical solution lies in: the low-noise amplifier is the low-noise amplifier that amplification factor is greater than 16.
A further technical solution lies in: the transition edges sensor is provided with 64, the superconducting quantum interference device
It is provided with 32.
The beneficial effects of adopting the technical scheme are that the system is drawn on the basis of existing safe examination system
Enter time-multiplexed concept, the number of superconducting quantum interference device (SQUID device) is reduced by being time-multiplexed, makes each
SQUID device can be supported to read the electric current of four transition edges sensors (TES device) simultaneously.By introducing GaN HEMT
Switching device of (high electron mobility transistor) modulator as Terahertz, realization carry out switch control to the response of TES device
System；The use number of SQUID device can be reduced, therefore reduces system cost.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the functional block diagram of Terahertz human body security check system described in the embodiment of the present invention；
Fig. 2 be low-noise amplifier in Terahertz human body security check system described in the embodiment of the present invention, transition edges sensor and
The functional block diagram of superconducting quantum interference device part；
Wherein: 1, low-noise amplifier；2, GaN HEMT modulator；3, transition edges sensor；4, superconducting quantum interference device；5,
Control computer；6, electromagnetic horn；7, rack；8, pulse refrigerator；9, principal reflection mirror；10, subreflector.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, but the present invention can be with
Implemented using other than the one described here other way, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by the specific embodiments disclosed below.
The Terahertz safe examination system of based superconductive device can realize farthest 25 meters of detection range, which uses quilt
Dynamic formula imaging, i.e., the terahertz signal for only receiving human body radiation carry out detection imaging.System operating center frequency is 220GHz, work
Making bandwidth is 90GHz(175 GHz -265GHz), the device work for receiving human body terahertz emission is TES device, i.e. transition side
Edge sensor, the current signal of TES is read by SQUID, that is, superconducting quantum interference device and amplify (wherein TES device and
SQUID device works under liquid helium temperature), the voltage signal that can carry out electricity processing is generated, voltage signal is adopted by data
It is sent into computer terminal display after collection, is the terahertz image for foring human body in computer display terminal.
As Figure 1-Figure 2, the embodiment of the invention discloses a kind of passive superconduction Terahertz human body security check system of 220GHz,
Including human body safety check instrument ontology, the safety check instrument ontology can be Terahertz human body safety check instrument in the prior art.Of the invention
Inventive point is: the human body safety check instrument ontology includes several low-noise amplifiers 1, and each low-noise amplifier 1 is through one
GaN HEMT modulator 2 is connect with the signal input part of a transition edges sensor 3, every four transition edges sensors 3
Signal output end is connect with the signal input part of a superconducting quantum interference device 4, and the working frequency of the low-noise amplifier 1 is
220GHz, the output end of superconducting quantum interference device 4 are connect with the signal input part of control computer 5, by electromagnetic horn 6 and low
Noise amplifier 1 receives human body terahertz emission, and amplifies to it, then successively controls each superconducting quantum interference device 4
Corresponding four GaN HEMT modulator 2 is connected, and realizes that the response to transition edges sensor 3 carries out switch control, superconduction amount
Sub- interferometer 4 is sequentially received the information of the transmission of transition edges sensor 3, and by transition side after handling received information
The current signal that edge sensor 3 acquires reads and amplifies, and generates the voltage signal that can carry out electricity processing, and voltage signal passes through
It is sent into control computer 5 after data acquisition, forms the terahertz image of human body on the display screen of control computer 5.
Further, as shown in Figure 1, the human body safety check instrument ontology further includes rack 7, arteries and veins is provided in the rack 7
Punching cooler 8, control computer 5, principal reflection mirror 9 and subreflector 10, the principal reflection mirror 9 are opposite with the subreflector 10
Setting, the principal reflection mirror 9 and subreflector 10 are used to converge the THz wave of human body generation.Preferably, the low noise is put
Big device 1 is the low-noise amplifier that amplification factor is greater than 16.Preferably, the transition edges sensor 3 is provided with 64, described
Superconducting quantum interference device is provided with 32.
Working principle: the electromagnetic wave that human-body emitting goes out is by will only be left the energy of terahertz wave band after low-noise amplifier
Amount, THz wave subsequently enter GaN HEMT switch modulator, and GaN HEMT switch modulator is based on the two dimension in GaN HEMT
Electron gas realizes that, to the regulation of the switch of THz wave, switching speed can reach GHz, can open the THz wave of entrance
It closes.System operating center frequency is 220GHz in the present embodiment, therefore in GaN HEMT modulation switch device, set 170-
Back-to-back Waveguide-microbelt excessive structural in 260GHz all-wave conduction band is wide, can further filter clutter, THz wave is irradiated to TES
On device, resistance on TES is caused to change, the variation of resistance causes the variation of electric current, and the variation of electric current is read by SQUID
Out.The switch state for successively adjusting GaN HEMT modulated amplifier is adjusted by electronic switch, makes only one TES of same time
The electric current of device has thus reached time division multiplexing read-out by SQUID, so that system can be reduced to SQUID device
Use number.
Claims (4)
1. a kind of passive superconduction Terahertz human body security check system of 220GHz, it is characterised in that: described including human body safety check instrument ontology
Human body safety check instrument ontology includes several low-noise amplifiers (1), and each low-noise amplifier (1) is modulated through a GaN HEMT
Device (2) is connect with the signal input part of a transition edges sensor (3), and the signal of every four transition edges sensors (3) is defeated
Outlet is connect with the signal input part of a superconducting quantum interference device (4), and the working frequency of the low-noise amplifier (1) is
The output end of 220GHz, superconducting quantum interference device (4) are connect with the signal input part of control computer (5), pass through electromagnetic horn
(6) and low-noise amplifier (1) receives human body terahertz emission, and amplifies to it, then successively controls each superconduction amount
Corresponding four GaN HEMT modulator (2) conducting of sub- interferometer (4), realizes that the response to transition edges sensor (3) carries out
Switch control, superconducting quantum interference device (4) are sequentially received the information of transition edges sensor (3) transmission, and to received letter
The current signal of transition edges sensor (3) acquisition is read and is amplified after being handled by breath, and generation can carry out electricity processing
Voltage signal, voltage signal be sent into after data acquire control computer (5), control computer (5) display screen on
Form the terahertz image of human body.
2. the passive superconduction Terahertz human body security check system of 220GHz as described in claim 1, it is characterised in that: the human body peace
Examining instrument ontology further includes rack (7), and pulse refrigerator (8), control computer (5), principal reflection mirror are provided on the rack (7)
(9) be oppositely arranged with subreflector (10), the principal reflection mirror (9) with the subreflector (10), the principal reflection mirror (9) and
Subreflector (10) is used to converge the THz wave of human body generation.
3. the passive superconduction Terahertz human body security check system of 220GHz as described in claim 1, it is characterised in that: the low noise
Amplifier (1) is the low-noise amplifier that amplification factor is greater than 16.
4. the passive superconduction Terahertz human body security check system of 220GHz as described in claim 1, it is characterised in that: the transition side
Edge sensor (3) is provided with 64, and the superconducting quantum interference device is provided with 32.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110109314A (en) * | 2019-04-29 | 2019-08-09 | 清华大学 | A kind of time division multiplexing SQUID amplifier and its preparation process for the reading of suiperconducting transition edge finder array |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279476A (en) * | 2011-07-15 | 2011-12-14 | 中国科学院苏州纳米技术与纳米仿生研究所 | High-speed electrically-modulating terahertz modulator |
| CN109031448A (en) * | 2018-10-29 | 2018-12-18 | 苏州耶拿微电子有限公司 | Using the passive superconduction Terahertz human body safety check instrument of WR4 waveguide |
| CN109031449A (en) * | 2018-10-29 | 2018-12-18 | 苏州耶拿微电子有限公司 | Using the passive superconduction Terahertz human body safety check instrument of WR10 waveguide |
-
2018
- 2018-12-26 CN CN201811599719.6A patent/CN109633773A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279476A (en) * | 2011-07-15 | 2011-12-14 | 中国科学院苏州纳米技术与纳米仿生研究所 | High-speed electrically-modulating terahertz modulator |
| CN109031448A (en) * | 2018-10-29 | 2018-12-18 | 苏州耶拿微电子有限公司 | Using the passive superconduction Terahertz human body safety check instrument of WR4 waveguide |
| CN109031449A (en) * | 2018-10-29 | 2018-12-18 | 苏州耶拿微电子有限公司 | Using the passive superconduction Terahertz human body safety check instrument of WR10 waveguide |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110109314A (en) * | 2019-04-29 | 2019-08-09 | 清华大学 | A kind of time division multiplexing SQUID amplifier and its preparation process for the reading of suiperconducting transition edge finder array |
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Application publication date: 20190416 |