CN108761553A - Passive millimeter wave binary channels synchronous imaging system and its imaging method for safety check - Google Patents
Passive millimeter wave binary channels synchronous imaging system and its imaging method for safety check Download PDFInfo
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Abstract
The invention discloses a kind of passive millimeter wave binary channels synchronous imaging systems and its imaging method for safety check, belong to the technical fields such as mm-wave imaging, safety check.The present invention includes smooth metal reflecting surface, Cassegrain antenna, radiometer, longitudinal turntable, fibre optical sensor, horizontal rotating disc, sensor catch, close switch, data acquisition unit, computer, scan control unit；Smooth metal reflecting surface is fixed on 45 degree of angles on longitudinal turntable, longitudinal turntable and Cassegrain antenna are coaxially fixed on horizontal rotating disc, the feed of Cassegrain antenna is connected with radiometer, and radiometer is connect with data acquisition unit, and data acquisition unit is connect with computer.Imaging system of the present invention is simple in structure, it is at low cost, small, low in energy consumption, stability is high, image taking speed is fast, the dangerous goods hidden on the person can be effectively detected out, and can safety check imaging be carried out to the tested personnel in the security check passage at left and right sides of scanning platform simultaneously, substantially increase safety check efficiency.
Description
Technical field
The invention belongs to the technical fields such as mm-wave imaging, safety check, are related to a kind of imaging system, and in particular to one kind is used for
The W-waveband passive millimeter wave binary channels synchronous imaging system of human body safety check.
Background technology
Nowadays the situation is tense for security protection, and people are proposed higher to the safety of safe examination system, reliability and intelligence
Requirement.Present safety check department mainly uses the contraband in X-ray safety check instrument detection luggage, and safety check detectability is strong, can obtain
The higher fluoroscopy images of resolution ratio are obtained, but the ionization harm to the human body of X-ray is larger, cannot be used for detecting and be hidden on the person
Contraband.Even if there is currently the X-ray machines of low radiation dose, but it is still not easy to be accepted by the public.Such as Anhui peace
So-called " dim light " the human body safety check instrument of anti-company production its be substantially exactly using low dosage X-ray to human body progress safety check at
Picture starts successively to come into operation in Chengdu east railway station and Chengdu Shuangliu International Airport in April, 2016, but once related special
Family discloses report, causes common people's fear immediately, is ordered in the form of urgent file by State Ministry of Environmental Protection on October 10th, 2016
It deactivates immediately.
Using metal detector, whether the person on have metal, but cannot detect the shape of metal if can detect,
It can not judge whether to be safe hard goods, for example have metal ingredient in artificial limb, it is also possible to wherein keep gun, metal detection
Device cannot in artificial limb metal and gun distinguish, and metal detector needs to detect object cooperation, and efficiency is too low.
Since the weapon etc. that passive millimeter wave imaging technique is hidden on the detection person has advantageous advantage,
So mm-wave imaging technology is used for safety check into a research hotspot in recent years.Passive millimeter imaging technology is to pass through inspection
The millimeter-wave radiation capacity volume variance for surveying target itself carries out comparison imaging, does not need radiation source, is perfectly safe to human body, and clothing
The textiles such as object are to millimeter wave almost unobstructed effect, so suitable for carrying out safety check imaging to human body.According to imaging system
Difference, passive millimeter wave imaging technique are broadly divided into following four：
First, phased array imaging technology, mechanical scanning is replaced using electron scanning.Phased array antenna is by two-dimensional array unit
Composition, each receiving unit are connected with a phase shifter, by controlling and receiving the phase and amplitude of unit, realize antenna beam
The ken.The advantages of technology is that system bulk is smaller, and image taking speed quickly, can realize real time imagery.But antenna structure is multiple
It is miscellaneous, it is more difficult to realize a high-resolution system, studied at present for imaging and passive imaging it is less, still be in development phase.
Second is that synthetic aperture imaging technology, one is simulated using partially coherent principle by the antenna combination of multiple smaller aperture dues
The effect of wide aperture antenna.Such as the NEC Corporation of Japan has developed model machine based on synthetic aperture imaging, German Space Agency is ground
Ground and airborne Ka wave bands and W-waveband synthetic aperture radiometers image-forming system etc. are made.Program technology relative maturity, but
It is to need multiple receiving unit composition thinned arrays, design cost and hardware cost are still very high.
Third, focal plane array image-forming technology, generally use parabola antenna or lens antenna focus, using plurality of cells
Antenna is distributed on focal plane and to the multiple spot in multiple target region while being imaged with the use of reflecting surface structure.It is typical to represent
Have the type products such as Vela125, X250, S350 of Millivision companies of the U.S., Lockheed Martin companies PMMW
The focal plane imaging instrument etc. of imager model machine and Northrop Grumman companies.The technology can greatly shorten imaging time,
But system complexity is higher, and and using focal plane arrays (FPA) as receiving unit, thousands of millimeter wave receiving units easily so that
Hardware cost is sufficiently expensive, also says to be difficult to promote at present.
It is more original millimeter-wave radiation imaging mode fourth, traditional mechanical scanning imaging technique.This kind of mode is adopted
The antenna for using beam angle narrow scans entire scene to obtain the image of scene as receiver, by mechanical movement.Example
As the single channel scanning imaging system of Millivision companies of the U.S., country of Ukraine superconduction radio research center are developed
8mm band imaging systems etc..Common scan mode needs constantly acceleration-deceleration based on rank scanning, in scanning process,
Imaging time is longer, and resolution ratio is relatively low；Or have improved procedure, by the way of another dimension mechanical scanning of electronically scanning at one dimension, add
Speed imaging time, but need to line up array using multiple receivers, considerably increase system cost.The advantages of system
It is that principle is simple, advantage of lower cost makes imaging time reduce if improved to some extent on imaging mode, does not need at some
It is then quite applicable that the occasion of real time imagery, which carries out human body safety check imaging,.
Invention content
It is insufficient existing for existing human body safety check mode the purpose of the present invention is overcoming, a kind of W for human body safety check is provided
The safe examination system of wave band passive millimeter wave binary channels synchronous imaging.
Technical problem proposed by the invention solves in this way：
A kind of W-waveband passive millimeter wave binary channels synchronous imaging system for human body safety check, including smooth metal reflection
Face 1, Cassegrain antenna 2, radiometer 3, longitudinal turntable 4, fibre optical sensor, horizontal rotating disc 6, sensor catch, close switch
801,802, data acquisition unit 9, computer 10, scan control unit 11；
Fibre optical sensor includes horizontal fiber sensor 501 and longitudinal fibre optical sensor 502；
Sensor catch includes two horizon sensor catch 701,702, close switch catch 703 and longitudinal sensor gear
Piece 704,705；
Smooth metal reflecting surface 1 and two longitudinal fibre optical sensor catch 704,705 are fixed on longitudinal turntable 4；It is longitudinal
Turntable 4 and Cassegrain antenna 2 are coaxially fixed on the offside of horizontal rotating disc 6 respectively；Two horizon sensor catch 701,702 and
It is each attached to the side of horizontal rotating disc 6 close to switch catch 703, is used for the start-stop position and level side of controlled level direction turntable
To the effective coverage of visual field；Smooth metal reflecting surface 1 is fixed on 45° angle on longitudinal turntable 4, center and Cassegrain antenna
2 center alignment；The feed of Cassegrain antenna 2 is fixed on the primary reflection surface of Cassegrain antenna 2；The input of radiometer 3
End is connected with the feed of Cassegrain antenna 2, and output end is connected with data acquisition unit 9；The output end of data acquisition unit 9 with
Computer 10, which is connected, carries out data processing and image recovery；Two 701,702 outsides of horizon sensor catch are provided with horizon light
Fiber sensor 501；Two 704,705 outsides of longitudinal sensor catch are provided with longitudinal fibre optical sensor 502；Close to switch catch
There are two close switches 801,802 for 703 outside settings；Horizontal rotating disc 6 and longitudinal turntable 4 are controlled by scan control unit 11 respectively
Two servo motors drive.
The millimeter wave energy that the radiation of two wing passage observation field scape all directions comes is reflected into casey by smooth metal reflecting surface 1
The primary reflection surface of Glenn antenna 2 focuses on feed by Cassegrain antenna 2, and the radiometer 3 being connected with feed can connect
The millimeter wave energy that each beam direction radiation of scape of winding up is come in.
Radiometer 3 is direct detection formula W-waveband millimeter wave radiometer, by the first LNA concatenation units the 301, the 2nd LNA grades
Receipts or other documents in duplicate member 302, pick-up unit 303 and video amplifier unit 304 form；Wherein Cassegrain antenna feed and the first LNA
Concatenation unit 301 is connected, and the first LNA concatenation units 301 are connected with the 2nd LNA concatenation units 302, the 2nd LNA concatenation units 302
It is connected with pick-up unit 303, pick-up unit 303 is connected with video amplifier unit 304；Observe the millimeter-wave radiation of scene
Energy is after the convergence of Cassegrain antenna 2, by the amplification of LNA concatenation units 301,302, the detection of pick-up unit/303, and
Video amplifier unit 304 amplifies, the output voltage signal linear with the millimeter wave energy of observation scene radiation.
45 ° of 4 maximum rotation angle of horizontal rotating disc, longitudinal turntable rotational angle are 360 ° of uniform rotation, longitudinal imaging viewing field
It can be adjusted flexibly according to realistic objective size by controlling the time of data acquisition.
During scanning imagery, binary channels object to be measured is located at the both sides of system.Pass through scan control unit 11
Two servo motors of control drive horizontal rotating disc 6 and longitudinal turntable 4 according to the rotating speed set while rotating, respectively to target field
The horizontal and vertical of scape is scanned.The Serve Motor Control that horizontal rotating disc 6 is rotated by a horizontal direction, horizontal direction turn
For dynamic maximum angle by being controlled close to switch catch 703 and two close to switch 801,802 on horizontal rotating disc, horizontal rotating disc 6 is equal
Speed rotation just rotates backward, and so on whenever being turned to close to switch catch 703 close to switch 801 or 802 position.?
Two horizon sensor catch 701,702 pass through horizontal fiber sensor 501 successively in 6 rotation process of horizontal rotating disc, successively produce
Raw two pulse signals, control beginning and end (the horizon sensor catch of two channel targets scene image datas acquisition
701,702 corresponding angles of circumference are less than two close to switch 801,802 corresponding angles of circumference).And the millimeter wave figure in two channels
The acquisition of each column data then passes through the arteries and veins of longitudinal generation of fibre optical sensor 502 in 1 rotation process of smooth metal reflecting surface as in
It rushes signal and acquires realization into line delay.Longitudinal sensor catch 704 generates pulse signal markers by longitudinal fibre optical sensor 502
Will reflecting surface and is just scanned to first channel targets scene, and the channel targets are collected by data acquisition unit delay
A row pixel data of corresponding position in scene；In the same manner, longitudinal sensor catch 705 is produced by longitudinal fibre optical sensor 502
It indicates that reflecting surface is just scanned to second channel targets scene when raw pulse signal, is delayed and is acquired by data acquisition unit
Obtain a row pixel data of corresponding position in the channel targets scene, wherein delay time is respectively less than two longitudinal optical fiber and passes
Sensor generates the interval of pulse signal.Therefore, 1 each rotation of smooth metal reflecting surface, data acquisition unit just collect both sides
A row pixel data of respective corresponding position in target scene.Since horizontal rotating disc 6 and longitudinal turntable 4 are all uniform rotation, institute
Rows of pixels that height in target scene is equal, alignment arrangement and is mutually parallel are corresponded to per column data with collected.
The collected data of data acquisition unit are finally transferred to computer and carry out the respective handlings such as data separating, overturning, respectively obtain
Binary channels millimeter-wave image.
The invention also discloses a kind of imaging methods using above-mentioned imaging system：Smooth metal reflecting surface 1 is even along axle center
Speed rotation, the two longitudinal sensor catch 704,705 rotated therewith pass through longitudinal fibre optical sensor 502 successively, respectively
It controls data acquisition unit 9 and data acquisition is carried out to the target scene in two channels of system or so, smooth metal reflecting surface 1 leaves
Target scene stops acquisition, and until next time, longitudinal fibre optical sensor 502 generates trigger pulse, and horizontal rotating disc 6 has just turned
The deviation angle in a horizontal direction is crossed, then starts the data acquisition of next column, until the acquisition of whole picture contextual data is completed；Root
Corresponding algorithm process is done according to gathered data and obtains the gray value or pseudo-colours value of binary channels object to be measured, is on computer 10
Reveal the millimeter-wave image of two Channel Synchronous scanning.
The beneficial effects of the invention are as follows：
It needs to accelerate repeatedly in translation scanning process in compared with the existing technology, slow down, it is of the present invention to be used for human body
The W-waveband passive millimeter wave binary channels synchronous imaging system of safety check utilizes direct detection formula W-waveband millimeter wave radiometer, does not need
Local oscillator, it is small, it is low in energy consumption；System cost and imaging time are taken into account, uses two-dimentional turntable spiral scan pattern, it is only necessary to two
Machine carousel uniform rotation is tieed up, is conducive to mechanical stability, and sweep speed is faster；To two destination channel synchronous scannings,
It doubles to improve safety check efficiency；This system is simple in structure, and stability is high, and scan efficiency is high, effectively can detect two simultaneously
Dangerous goods hiding with human body on a channel.
Description of the drawings
Fig. 1 is the operative scenario schematic diagram of system of the present invention；
Fig. 2 is the overall structure block diagram of system of the present invention；
Fig. 3 is the schematic side view of system of the present invention；
Fig. 4 is the schematic top plan view of system of the present invention；
Fig. 5 is the direct detection formula W-waveband millimeter wave radiometer structural schematic diagram of system of the present invention；
Fig. 6 is that system of the present invention realizes the schematic diagram scanned to binary channels object synchronization；
Fig. 7 is scanning track schematic diagram of the system of the present invention to objective plane；
Fig. 8 be carried respectively in two wing passage of system pair of the present invention the target body of metal gun and metal knife into
The design sketch of row scanning imagery.
Specific implementation mode
The present invention is further detailed with reference to the accompanying drawings and examples.
The present embodiment provides a kind of safety check systems of the W-waveband passive millimeter wave binary channels synchronous imaging for human body safety check
System, operative scenario schematic diagram as shown in Figure 1, overall structure block diagram, schematic side view and schematic top plan view respectively such as Fig. 2, Fig. 3
Shown in Fig. 4, including smooth metal reflecting surface 1, Cassegrain antenna 2, radiometer 3, longitudinal turntable 4, fibre optical sensor, level
Turntable 6, sensor catch, close switch 801,802, data acquisition unit 9, computer 10, scan control unit 11；
Fibre optical sensor includes horizontal fiber sensor 501 and longitudinal fibre optical sensor 502；
Sensor catch includes two horizon sensor catch 701,702, close switch catch 703 and longitudinal sensor gear
Piece 704,705；
The bore of Cassegrain antenna 2 is 300mm；
Smooth metal reflecting surface 1 and two longitudinal fibre optical sensor catch 704,705 are fixed on longitudinal turntable 4；It is longitudinal
Turntable 4 and Cassegrain antenna 2 are coaxially fixed on the offside of horizontal rotating disc 6 respectively；Two horizon sensor catch 701,702 and
It is each attached to the side of horizontal rotating disc 6 close to switch catch 703, is used for the start-stop position and level side of controlled level direction turntable
To the effective coverage of visual field；Smooth metal reflecting surface 1 is fixed on 45° angle on longitudinal turntable 4, center and Cassegrain antenna
2 center alignment；The feed of Cassegrain antenna 2 is fixed on the primary reflection surface of Cassegrain antenna 2；The input of radiometer 3
End is connected with the feed of Cassegrain antenna 2, and output end is connected with data acquisition unit 9；The output end of data acquisition unit 9 with
Computer 10, which is connected, carries out data processing and image recovery；Two 701,702 outsides of horizon sensor catch are provided with horizon light
Fiber sensor 501；Two 704,705 outsides of longitudinal sensor catch are provided with longitudinal fibre optical sensor 502；Close to switch catch
There are two close switches 801,802 for 703 outside settings；Horizontal rotating disc 6 and longitudinal turntable 4 are controlled by scan control unit 11 respectively
Two servo motors drive.
The millimeter wave energy that the radiation of two wing passage observation field scape all directions comes is reflected into casey by smooth metal reflecting surface 1
The primary reflection surface of Glenn antenna 2 focuses on feed by Cassegrain antenna 2, and the radiometer 3 being connected with feed can connect
The millimeter wave energy that each beam direction radiation of scape of winding up is come in.
Radiometer 3 is direct detection formula W-waveband millimeter wave radiometer, and structural schematic diagram is as shown in figure 5, by the first LNA
Concatenation unit 301, the 2nd LNA concatenation units 302, pick-up unit 303 and video amplifier unit 304 form；Wherein casey
The feed of Glenn antenna 2 is connected with the first LNA concatenation units 301, the first LNA concatenation units 301 and the 2nd LNA concatenation units
302 are connected, and the 2nd LNA concatenation units 302 are connected with pick-up unit 303, pick-up unit 303 and video amplifier unit
304 are connected；The millimeter-wave radiation energy of scene is observed after the convergence of Cassegrain antenna 2, by LNA concatenation units 301,302
Amplification, the detection of pick-up unit/303 and video amplifier unit 304 amplify, the millimeter wave of output and observation scene radiation
The linear voltage signal of energy.
45 ° of 4 maximum rotation angle of horizontal rotating disc, longitudinal turntable rotational angle are 360 ° of uniform rotation, longitudinal imaging viewing field
It can be adjusted flexibly according to realistic objective size by controlling the time of data acquisition.
As shown in figures 1 to 6, during scanning imagery, binary channels object to be measured is located at the both sides of system.Pass through
Scan control unit 11 controls two servo motors and drives horizontal rotating disc 6 and longitudinal turntable 4 according to the rotating speed set while turning
It is dynamic, the horizontal and vertical of target scene is scanned respectively.The servo motor control that horizontal rotating disc 6 is rotated by a horizontal direction
System, the rotation maximum angle of horizontal direction close to switch catch 703 and two on horizontal rotating disc close to switch 801,802 by controlling
System, the rotation of 6 average rate of horizontal rotating disc are just reversed to turn whenever being turned to close to switch catch 703 close to switch 801 or 802 position
It is dynamic, and so on.A, b are respectively the forward and reverse position for turning to maximum angle of horizontal rotating disc in Fig. 4.It is rotated in horizontal rotating disc 6
Two horizon sensor catch 701,702 pass through horizontal fiber sensor 501 successively in the process, successively generate two pulse letters
Number, controlling the beginning and end that two channel targets scene image datas acquire, (horizon sensor catch 701,702 is corresponding
Angle of circumference is less than two close to switch 801,802 corresponding angles of circumference).And each column data in the millimeter-wave image in two channels
Acquisition then acquired into line delay by the pulse signal that longitudinal fibre optical sensor generates in 1 rotation process of smooth metal reflecting surface
It realizes.During Fig. 6 is longitudinal turntable 4 and 1 each rotation of smooth metal reflecting surface, realizes and binary channels object synchronization is scanned
Schematic diagram, wherein O is the center of longitudinal turntable, and d is the horizontal distance that longitudinal center of turntable arrives objective plane, and θ puts down for target
The longitudinal scanning wide viewing angle (being determined by data acquisition time) in face.Longitudinal sensor catch 704 is by longitudinal fibre optical sensor
It indicates that reflecting surface is just scanned to first channel targets scene when 502 generation pulse signal, is prolonged by data acquisition unit
When collect a row pixel data of corresponding position in the channel targets scene；In the same manner, longitudinal sensor catch 705 passes through
Longitudinal fibre optical sensor 502 indicates that reflecting surface is just scanned to second channel targets scene when generating pulse signal, passes through
Data acquisition unit 9, which is delayed, collects a row pixel data of corresponding position in the channel targets scene, wherein delay time
Respectively less than two longitudinal fibre optical sensors generate the interval of pulse signal.Therefore, 1 each rotation of smooth metal reflecting surface, data
Collecting unit 9 just collects a row pixel data of respective corresponding position in the target scene of both sides.Due to horizontal rotating disc 6 and longitudinal direction
Turntable 4 is all uniform rotation, so collected correspond in target scene equal height, alignment arrangement and mutually per column data
Parallel rows of pixels.Fig. 7 is the scanning track schematic diagram of each channel targets plane in each scanning process, wherein empty
Line indicates the track being scanned to objective plane and data acquire.For example, two horizon sensor catch 701,702 pass through successively
The time interval for crossing horizontal fiber sensor 501 is 5s, and the width of both sides 3m distant object scenes is 1m, and metal mirror turns
Speed is 8r/s, and the data of capture card each column acquisition are 100, and the height of corresponding 3m distant object scenes is 2m, then completes primary
It scans two wing passages and obtains 40 column datas, per column data 100, this 40*100 data is to the distant places 3m width 1m high 2m mesh
Mark the imaging data of scene.The collected data of data acquisition unit are finally transferred to computer and carry out data separating, overturning etc.
Respective handling respectively obtains binary channels millimeter-wave image.Fig. 8 is that there are carrying metal gun at station respectively to two wing passage of scanning platform
The design sketch of imaging is scanned with two target bodies of metal knife.
The present embodiment also discloses a kind of imaging method using above-mentioned imaging system：Smooth metal reflecting surface 1 is along axle center
Uniform rotation, the two longitudinal sensor catch 704,705 rotated therewith pass through longitudinal fibre optical sensor 502 successively, point
Not Kong Zhi data acquisition unit 9 data acquisition, 1 turn of smooth metal reflecting surface are carried out to the target scene in two channels of system or so
Stop acquisition from target scene, longitudinal fibre optical sensor 502 generates trigger pulse until next time, and horizontal rotating disc 6 is just
The deviation angle in a horizontal direction is turned over, then starts the data acquisition of next column, until the acquisition of whole picture contextual data is completed；
Corresponding algorithm process is done according to gathered data and obtains the gray value or pseudo-colours value of binary channels object to be measured, on computer 10
Show the millimeter-wave image of two Channel Synchronous scanning.
The image-forming principle of the present invention is as follows：
Temperature can be from shooting radiated electromagnetic wave, the electromagnetic wave energy distribution of radiation higher than the object of absolute zero in nature
In wide wave frequency range in, wherein in the range of bandwidth is Δ f near millimeter-wave frequency f, object unit bodies
Accumulating the millimeter wave energy size that itself is radiated is：
Wherein phy symbol meaning is：
The emissivity of ρ --- object, between 0 and 1, the emissivity of black matrix is 1, and the emissivity of metal is 0.
K --- Boltzmann constant is 1.38054 × 10-23J/K。
The physical temperature of T --- object.
C --- the light velocity is 299792458m/s.
The millimeter wave power of visible oBject itself radiation is directly proportional to the physical temperature of object.Object not only itself radiates milli
Metric wave energy can also reflect the millimeter wave energy impinged upon thereon, transmit the millimeter wave energy of its rear object radiation, object radiation
Total millimeter wave energy usually can use object resulting radiation temperature TETo weigh：
TE=ρ T0+rTI+tTB (2)
Wherein, the reflectivity of r --- object
TI--- ambient illumination temperature
The transmissivity of t --- object
TB--- the radiation temperature of behind object
Different resulting radiation temperatures is presented since rate, reflectivity and transmissivity difference are hit in transmitting in the object of unlike material.
Such as metal is substantially reflection environment irradiation temperature (ρ=0, r=1), human body absorbs millimeter wave (ρ=0.5~0.9, r < mostly
0.5), and clothes then mainly allow millimeter wave transmit (t=0.6~0.9)；The imaging of passive millimeter wave human body safety check is based on this
What characteristic was realized.
Radiometer receives the millimeter wave energy of scene radiation, and converts it into voltage output, and the voltage of output is：
Vd=CGRF(Ps+Pm) (3)
Wherein, GRFFor LNA concatenation unit gains, C is detection tube sensitivity, PsThe millimeter-wave signal work(received for radiometer
Rate, PrnFor the noise power of radiometer itself.
In conclusion the W-waveband passive millimeter wave binary channels synchronous imaging system proposed by the present invention for human body safety check
System cost and imaging time have been taken into account, it is using two-dimentional turntable spiral scan pattern, i.e., same by horizontal and longitudinal two turntables
When uniform rotation carry out two-dimensional scan, wherein longitudinal turntable and cassette antenna be it is concentric be fixed on horizontal rotating disc together,
Cassegrain antenna receives the millimeter-wave radiation energy of the target scene of longitudinal turntable Smooth metallic plate reflection, passes to milli
Metric wave radiometer；Using direct detection formula W-waveband millimeter wave radiometer, local oscillator is not needed, it is small, it is low in energy consumption；To two mesh
Channel Synchronous scanning is marked, doubles to improve safety check efficiency.This system is simple in structure, and stability is high, and scan efficiency is high, can be effective
Ground detects dangerous goods hiding with human body on two channels simultaneously.
Description and application of the invention herein are illustrative, is not wishing to limit the scope of the invention to above-described embodiment
In.The deformation and change of embodiments disclosed herein are possible, real for those skilled in the art
The replacement and equivalent various parts for applying example are well known.It should be appreciated by the person skilled in the art that not departing from the present invention
Spirit or essential characteristics in the case of, the present invention can in other forms, structure, arrangement, ratio, and with other components,
Material and component are realized.Without departing from the scope and spirit of the present invention, can to embodiments disclosed herein into
The other deformations of row and change.
Claims (4)
1. a kind of W-waveband passive millimeter wave binary channels synchronous imaging system for human body safety check, which is characterized in that including smooth
Metal mirror (1), radiometer (3), longitudinal turntable (4), fibre optical sensor, horizontal rotating disc (6), passes Cassegrain antenna (2)
Sensor catch, close switch (801,802), data acquisition unit (9), computer (10), scan control unit (11)；
Fibre optical sensor includes horizontal fiber sensor (501) and longitudinal fibre optical sensor (502)；
Sensor catch includes two horizon sensor catch (701,702), is kept off close to switch catch (703) and longitudinal sensor
Piece (704,705)；
Smooth metal reflecting surface (1) and two longitudinal fibre optical sensor catch (704,705) are fixed on longitudinal turntable (4)；It is vertical
Coaxially it is fixed on the offside of horizontal rotating disc (6) respectively to turntable (4) and Cassegrain antenna (2)；Two horizon sensor catch
(701,702) and the side that horizontal rotating disc (6) are each attached to close to switch catch (703)；Smooth metal reflecting surface (1) is with 45 °
Angle is fixed on longitudinal turntable (4), and center is aligned with the center of Cassegrain antenna (2)；The feed of Cassegrain antenna (2)
It is fixed on the primary reflection surface of Cassegrain antenna (2)；The feed phase of the input terminal and Cassegrain antenna (2) of radiometer (3)
Even, output end is connected with data acquisition unit (9)；The output end of data acquisition unit (9) is connected with computer (10) into line number
Restore according to processing and image；It is provided with horizontal fiber sensor (501) on the outside of two horizon sensor catch (701,702)；Two
It is provided with longitudinal fibre optical sensor (502) on the outside of a longitudinal sensor catch (704,705)；Close on the outside of switch catch (703)
There are two close switches (801,802) for setting；Horizontal rotating disc (6) and longitudinal turntable (4) are controlled by scan control unit (11) respectively
Two servo motors of system drive.
2. the W-waveband passive millimeter wave binary channels synchronous imaging system according to claim 1 for human body safety check, special
Sign is that radiometer (3) is direct detection formula W-waveband millimeter wave radiometer, by the first LNA concatenation units (301), second
LNA concatenation units (302), pick-up unit (303) and video amplifier unit (304) composition；Wherein Cassegrain antenna is presented
Source is connected with the first LNA concatenation units (301), and the first LNA concatenation units (301) are connected with the 2nd LNA concatenation units (302),
2nd LNA concatenation units (302) are connected with pick-up unit (303), pick-up unit (303) and video amplifier unit
(304) it is connected.
3. the W-waveband passive millimeter wave binary channels synchronous imaging system according to claim 1 for human body safety check, special
Sign is：System is using double turntable spiral scan patterns to the binary channels object synchronization scanning imagery of system both sides；Pass through scanning
Control unit (11) control two servo motors drive horizontal rotating discs (6) and longitudinal direction turntable (4) according to the rotating speed set simultaneously
The scanning horizontal and vertical to target scene to be measured is realized in uniform rotation respectively；Wherein, horizontal rotating disc (6) maximum rotation angle
45 °, longitudinal turntable (4) rotational angle is 360 ° of uniform rotation.
4. a kind of imaging method using imaging system described in claim 1, which is characterized in that smooth metal reflecting surface (1)
Along axle center uniform rotation, the two longitudinal sensor catch (704,705) rotated therewith pass through longitudinal Fibre Optical Sensor successively
Device (502) controls data acquisition unit (9) and carries out data acquisition to the target scene in two channels of system or so respectively, smooth
Metal mirror (1) leaves target scene and stops acquisition, and until next time, longitudinal fibre optical sensor (502) generates triggering arteries and veins
Punching, horizontal rotating disc (6) just have turned through the deviation angle in a horizontal direction, then start the data acquisition of next column, until
The acquisition of whole picture contextual data is completed；Gathered data obtains the gray value or puppet of binary channels object to be measured by corresponding algorithm process
Value of color shows the millimeter-wave image of two Channel Synchronous scanning on computer (10).
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| CN201810218653.5A CN108761553B (en) | 2018-03-16 | 2018-03-16 | Passive millimeter wave dual-channel synchronous imaging system for security inspection and imaging method thereof |
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| CN201810218653.5A CN108761553B (en) | 2018-03-16 | 2018-03-16 | Passive millimeter wave dual-channel synchronous imaging system for security inspection and imaging method thereof |
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| CN108761553B CN108761553B (en) | 2021-03-26 |
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| CN109472089A (en) * | 2018-11-12 | 2019-03-15 | 北京航空航天大学 | A kind of thinned array optimization layout structure and design method suitable for passive millimeter wave human body safety check instrument |
| CN109581527A (en) * | 2018-12-21 | 2019-04-05 | 济南爱我本克网络科技有限公司 | The driving device and method of double-arm millimeter wave imaging system rotating mechanism |
| CN109613619A (en) * | 2018-12-21 | 2019-04-12 | 济南爱我本克网络科技有限公司 | The driving device and method of single arm type millimeter wave imaging system rotating mechanism |
| CN109725363A (en) * | 2019-01-18 | 2019-05-07 | 徐州纽卡电子科技有限公司 | Mm-wave imaging duplex scanning detection system |
| CN110531436A (en) * | 2019-09-06 | 2019-12-03 | 哈尔滨工业大学 | A kind of two-dimensional scanning passive millimeter wave imaging system and method |
| CN111983606A (en) * | 2020-09-03 | 2020-11-24 | 安徽雷鼎电子科技有限公司 | Near-field imaging method of rolling type one-dimensional array radar |
| CN113009588A (en) * | 2021-03-01 | 2021-06-22 | 杭州睿影科技有限公司 | Human body security check equipment based on millimeter wave imaging |
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| CN109472089A (en) * | 2018-11-12 | 2019-03-15 | 北京航空航天大学 | A kind of thinned array optimization layout structure and design method suitable for passive millimeter wave human body safety check instrument |
| CN109472089B (en) * | 2018-11-12 | 2020-12-04 | 北京航空航天大学 | Layout structure and method suitable for passive millimeter wave human body security check instrument |
| CN109581527A (en) * | 2018-12-21 | 2019-04-05 | 济南爱我本克网络科技有限公司 | The driving device and method of double-arm millimeter wave imaging system rotating mechanism |
| CN109613619A (en) * | 2018-12-21 | 2019-04-12 | 济南爱我本克网络科技有限公司 | The driving device and method of single arm type millimeter wave imaging system rotating mechanism |
| CN109613619B (en) * | 2018-12-21 | 2020-11-17 | 济南爱我本克网络科技有限公司 | Driving device and method for rotating mechanism of single-arm millimeter wave imaging system |
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| CN109725363B (en) * | 2019-01-18 | 2020-11-24 | 徐州纽卡电子科技有限公司 | Millimeter wave imaging double-side scanning detection system |
| CN110531436A (en) * | 2019-09-06 | 2019-12-03 | 哈尔滨工业大学 | A kind of two-dimensional scanning passive millimeter wave imaging system and method |
| CN111983606A (en) * | 2020-09-03 | 2020-11-24 | 安徽雷鼎电子科技有限公司 | Near-field imaging method of rolling type one-dimensional array radar |
| CN113009588A (en) * | 2021-03-01 | 2021-06-22 | 杭州睿影科技有限公司 | Human body security check equipment based on millimeter wave imaging |
| CN113009588B (en) * | 2021-03-01 | 2023-05-02 | 杭州睿影科技有限公司 | Human body security inspection equipment based on millimeter wave imaging |
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