CN102426361A - Human body security inspection system used for millimeter wave active three-dimensional holographic imaging - Google Patents
Human body security inspection system used for millimeter wave active three-dimensional holographic imaging Download PDFInfo
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- CN102426361A CN102426361A CN2011103347689A CN201110334768A CN102426361A CN 102426361 A CN102426361 A CN 102426361A CN 2011103347689 A CN2011103347689 A CN 2011103347689A CN 201110334768 A CN201110334768 A CN 201110334768A CN 102426361 A CN102426361 A CN 102426361A
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Abstract
The invention discloses a human body security inspection system used for millimeter wave active three-dimensional holographic imaging. The system comprises a cylindrical main body frame provided with an outlet and an inlet, a first millimeter wave transceiver and a second millimeter wave transceiver as well as a first millimeter wave switch antenna array and a second millimeter wave switch antenna array which are correspondingly connected; a rotary scanning and driving device is used for driving the first millimeter wave switch antenna array and the second millimeter wave switch antenna array to rotate oppositely; a control device is used for controlling the rotary scanning and driving device as well as the first millimeter wave transceiver and the second millimeter wave transceiver to cause the first millimeter wave transceiver and the second millimeter wave transceiver to respectively carry out parallel cylindrical rotating scanning on area to be scanned in a first scanning area and a second scanning area; and a parallel image processing device is used for synthesizing a three-dimensional holographic image of personnel to be inspected according to acquisition data of the first millimeter wave transceiver and the second millimeter wave transceiver and spatial position information of the acquisition data. By adopting the human body security inspection system used for millimeter wave active three-dimensional holographic imaging, disclosed by the invention, detecting velocity on the personnel to be inspected is improved.
Description
Technical field
The present invention relates to a kind of human body security check system.More specifically, the present invention relates to human body security check system and scan method based on the imaging of the 3D hologram of the active high speed column rotation sweep of millimeter wave.
Background technology
The urgent of International Terrorism form proposed many-sided new demand to human body safety check, needs at first to realize that the human body clothing is covered article down realizes that the non-formula 3D hologram imaging of undressing detects, and improves the efficient of discerning suspicious object; The second, need the expansion detectability, can realize detecting, comprise gun, cutter, explosive, drugs, CD, cash, liquid, chip, pottery etc. metal and non-metal article; Three, need on the basis that ensures above demand, reduce of the harm of safe examination system detection means to health.
The prior art means that can be used for human body safety check comprise: metal detection, x-ray imaging, master, passive millimeter wave detection etc.
Traditional personnel's safe examination system adopts metal object detection door and hand-held metal detector that human body is carried out the metal contraband goods basically and surveys, and this mode can't detect the nonmetal contraband goods that concealment is carried, and like drugs, explosive etc., brings hidden danger to security protection.
In recent years, the X ray human body safety check appearance that has occurred low radiation dose in the world can be realized the detection to metal and nonmetal target, because there is radiation hazard in it to personnel's health, is not accepted by the public, is difficult in daily safety check, promote the use of.
By contrast; The millimeter wave detection technology has can penetrate the human body clothing; Little to human body radiation dosage, realize imaging, can discern plurality of advantages such as each metalloid and nonmetal contraband goods; Along with the development of millimeter-wave technology and the reduction of device cost, in human body safety check, just progressively draw attention over past ten years.The millimeter wave detection technology can be divided into passive detection and active detection; The passive detection technology is to utilize the microwave brightness temperature of object spontaneous radiation; Realize by the imaging of observed objects through modes such as focal plane arrays (FPA) microwave radiation machine, synthetic synthetic aperture microwave radiometers; Present this mode exists that imaging precision is not high, the problem of systematic observation real-time difference, can't get into practical application at present.
Active millimeter wave human body security check system mainly utilizes plane synthetic aperture technique, cylinder synthetic aperture technique.Wherein: the scarce capacity that the plane synthetic aperture technique produces the 3D hologram stereo-picture, utilize the cylinder synthetic aperture technique to become the developing direction of active millimeter wave human body security check system at present.
The active high speed column of millimeter wave rotation sweep three-dimensional imaging human body security check system has taked the active column synthetic aperture technique of millimeter wave to realize the non-formula safety detection of undressing to the personnel to be tested.Rotation sweep and vertical direction TURP that this safe examination system has taked switch aerial array circumferencial direction machinery to drive change the detection mode that scanning combines.
But existing safe examination system is single switch aerial array, uses single switch arrays antenna that the mode that the personnel to be tested carries out scanning probe has been prolonged the sweep time to the personnel to be tested, has reduced safety check efficient.
Summary of the invention
The object of the invention is to provide the human body security check system of the active 3D hologram imaging of a kind of millimeter wave, realizes the fast detecting to the personnel to be tested.
The human body security check system of the active 3D hologram imaging of millimeter wave of the present invention comprises:
Have the cylindrical body framework of gateway, form first scanning area, second scanning area and zone to be scanned;
First millimeter wave transceiver and second millimeter wave transceiver;
The first millimeter wave switch aerial array that is connected with said first millimeter wave transceiver is with the second millimeter wave switch aerial array that is connected with said second millimeter wave transceiver;
The rotation sweep drive unit is used to drive the rotation of said first millimeter wave switch aerial array and the said second millimeter wave switch aerial array subtend;
Control device is used to control the rotation sweep drive unit and first and second millimeter wave transceivers, make the first and second millimeter wave switch aerial arrays respectively in first and second scanning areas to the said zone to be scanned cylinder rotation sweep that walks abreast; And
The parallel image treating apparatus is used for according to synthesizing personnel to be tested's 3D hologram image from the image data of first and second millimeter wave transceivers and the spatial positional information of this image data.
Further, said rotation sweep drive unit comprises two symmetrically arranged swivel arms, and the said first millimeter wave switch aerial array and the second millimeter wave switch aerial array are separately positioned on the said swivel arm.
Further, said rotation sweep drive unit comprises grating angle information output unit, is used to export the rotation angle information of the said first and second millimeter wave switch aerial arrays.
Further, the rotating range of said first millimeter wave switch aerial array and said second millimeter wave switch aerial array subtend rotation is 120 degree.
Further; Said first and second millimeter wave transceivers comprise timing control unit respectively; Said millimeter wave switch arrays antenna is confirmed the column scan position on the horizontal circumference direction of scanning through said grating angle information output unit, switches through the scanning that said timing control unit is implemented on the vertical sweep direction.
Further, millimeter wave switch aerial array comprises a plurality of receiving antennas unit and corresponding a plurality of transmission antenna unit, and receiving antenna unit and transmission antenna unit apportion are staggered, and uniformly-spaced arrange between each antenna element.
Further, said antenna is electromagnetic horn and/or dielectric rod antenna, and said switch is that hilted broadsword is thrown the stacked combination form more and is used for the switching to antenna element.
Further, each millimeter wave transceiver provides the step frequency continuous wave to corresponding millimeter wave switch aerial array, and operating frequency range is 12 to 50GHz.
On the other hand, the present invention also provides the scan method of the human body security check system of the active 3D hologram imaging of a kind of millimeter wave.This method comprises: said rotation sweep drive unit drive under the control of control device the said first millimeter wave switch aerial array and the second millimeter wave switch aerial array respectively in first scanning area and second scanning area parallel subtend rotation treat scanning area and carry out the cylinder rotation sweep, the parallel image treating apparatus is according to the 3D hologram image from the synthetic personnel to be tested of spatial positional information of the image data of first and second millimeter wave transceivers and this image data.
Further, receiving antenna unit in the said millimeter wave switch aerial array and the transmission antenna unit transmitting-receiving that interlocks.
On the other hand, the human body security check system of the active 3D hologram imaging of millimeter wave of the present invention adopts frequency division scan mode and empty branch scan mode that the personnel to be tested is scanned.
Said frequency division mode is in scan period, and the frequency of operation of the detectable signal that provides with second millimeter wave transceiver that synchronization first millimeter wave transceiver provides is different.
Further, in scan period, the frequency of operation of the detectable signal that provides with second millimeter wave transceiver that synchronization first millimeter wave transceiver provides has equal difference on the frequency.
Further, first millimeter wave transceiver and second millimeter wave transceiver provide step frequency continuous wave detectable signal respectively.
Further, in scan period, the frequency of operation of the detectable signal that provides with second millimeter wave transceiver that synchronization first millimeter wave transceiver provides differs 50MHz.
Said empty branch mode scan method is in scan period, and the detection of antenna element is highly different in the arbitrary moment first millimeter wave switch aerial array and the second millimeter wave switch aerial array.
Further, in whole scan period, said detection height position keeps identical difference.
Further, empty branch mode scan method comprises:
Respectively the first millimeter wave switch aerial array is equally divided into first the first half and first the latter half, the second millimeter wave switch aerial array is equally divided into second the first half and second the latter half;
The first millimeter wave switch aerial array is scanned up to last antenna element of said first the first half downwards from first antenna element of said first the first half; Simultaneously, the second millimeter wave switch aerial array is scanned up to last antenna element of said second the latter half downwards from first antenna element of said second the latter half; And
The first millimeter wave switch aerial array is scanned up to last antenna element of said first the latter half downwards from first antenna element of said first the latter half; Simultaneously, the second millimeter wave switch aerial array is scanned up to last antenna element of said second the first half downwards from first antenna element of said second the first half.
Perhaps, empty branch mode scan method comprises:
Respectively the first millimeter wave switch aerial array is equally divided into first the first half and first the latter half, the second millimeter wave switch aerial array is equally divided into second the first half and second the latter half;
The first millimeter wave switch aerial array is scanned up to last antenna element of said first the latter half downwards from first antenna element of said first the latter half; Simultaneously, the second millimeter wave switch aerial array is scanned up to last antenna element of said second the first half downwards from first antenna element of said second the first half; And
The first millimeter wave switch aerial array is scanned up to last antenna element of said first the first half downwards from first antenna element of said first the first half; Simultaneously, the second millimeter wave switch aerial array is scanned up to last antenna element of said second the latter half downwards from first antenna element of said second the latter half.
Perhaps, the scan method of empty branch mode comprises:
Respectively the first millimeter wave switch aerial array is equally divided into first the first half and first the latter half, the second millimeter wave switch aerial array is equally divided into second the first half and second the latter half;
The first millimeter wave switch aerial array upwards is scanned up to first antenna element of said first the first half from last antenna element of said first the first half; Simultaneously, the second millimeter wave switch aerial array upwards is scanned up to first antenna element of said second the latter half from last antenna element of said second the latter half; And
The first millimeter wave switch aerial array upwards is scanned up to first antenna element of said first the latter half from last antenna element of said first the latter half; Simultaneously, the second millimeter wave switch aerial array upwards is scanned up to first antenna element of said second the first half from last antenna element of said second the first half.
Perhaps, empty branch mode scan method comprises: respectively the first millimeter wave switch aerial array is equally divided into first the first half and first the latter half, the second millimeter wave switch aerial array is equally divided into second the first half and second the latter half;
The first millimeter wave switch aerial array upwards is scanned up to first antenna element of said first the latter half from last antenna element of said first the latter half; Simultaneously, the second millimeter wave switch aerial array upwards is scanned up to first antenna element of said second the first half from last antenna element of said second the first half; And
The first millimeter wave switch aerial array upwards is scanned up to first antenna element of said first the first half from last antenna element of said first the first half; Simultaneously, the second millimeter wave switch aerial array upwards is scanned up to first antenna element of said second the latter half from last antenna element of said second the latter half.
The present invention also can be used in combination frequency division mode scan method and empty branch mode scan method.
The invention has the advantages that:
The three-dimensional column scanning safe examination system of the through type structure that 1, adopts can be positioned over the security check passage critical point, and the personnel to be tested can come into the safety check zone straight, to improve safety check efficient.
2, through adopting the mode of two millimeter wave transceivers and the concurrent working of millimeter wave switch aerial array; Compare with the form of millimeter wave array antenna with millimeter wave transceiver of employing; Can shorten the safety check time greatly, avoid human body the wobble effects image quality during long scanning probe, to occur.
3, through adopting the interleaving detection technology between the array antenna Transmit-Receive Unit, can improve and treat the precision that scanning area vertical direction wave beam is surveyed, the resolution of imaging results at vertical direction is doubled.
4, adopted the high precision rotation sweep drive unit that to export rotation angle information, can accurately obtain the angle position of millimeter array antenna, with the detection accuracy of the circumferencial direction rotation sweep of improving the standard at horizontal circumferencial direction rotation sweep.
5,, improved the imaging definition level through frequency division, avoided the subtend radiation interference when empty branch technology makes millimeter wave switch aerial array subtend and line scanning.
Description of drawings
Below with reference to accompanying drawings and combine embodiment that the present invention is specified.
Fig. 1 is the main block diagram of the human body security check system of the active 3D hologram imaging of millimeter wave of the present invention;
Fig. 2 is the top view of system of the present invention;
Fig. 3 forms the work relationship figure that reaches with miscellaneous part for the millimeter wave transceiver of system of the present invention;
Fig. 4 is the millimeter wave switch antenna array structure synoptic diagram of system of the present invention;
Fig. 5 form for the rotation sweep drive unit of system of the present invention and with miscellaneous part work relationship figure;
Fig. 6 is system works flow process figure;
Fig. 7 is system's Flame Image Process basic flow sheet;
Fig. 8 is empty branch mode technical schematic diagram.
Embodiment
With reference to the accompanying drawings and by embodiments of the invention, technical scheme of the present invention is done detailed description.Should be appreciated that each component is schematic and nonrestrictive shown in the accompanying drawing, each characteristic is not in scale draws.In each device accompanying drawing, identical Reference numeral is represented identical component.
As illustrated in fig. 1 and 2, the human body security check system of the active 3D hologram of millimeter wave of the present invention imaging comprises columned main body frame 1, controls computing machine 13, control device 4, first millimeter wave transceiver 2 and second millimeter wave transceiver 3, the first millimeter wave switch aerial array 7 that is connected with first millimeter wave transceiver 2 and the second millimeter wave switch aerial array 8 that is connected with second millimeter wave transceiver 3, the rotation sweep drive unit 6 and the parallel image treating apparatus 5 that can produce rotation angle information.This safe examination system is the through type structure, and promptly columned main body frame 1 is provided with inlet 11 and outlet 12, main body frame 1 is inner form to be scanned regional 15, at inlet 11 with export and form first scanning area 9 and second scanning area 10 that is symmetrically distributed between 12.Main body frame 1 top is provided with rotation sweep drive unit 6; As shown in Figure 5; This rotation sweep drive unit 6 comprises motor 30, wheel box 31, comprises that also two symmetrically arranged swivel arms 32 are used for respectively fixedly millimeter wave transceiver and millimeter wave switch aerial array.In the present embodiment, first millimeter wave transceiver 2, the first millimeter wave switch aerial array 7 are suspended on the swivel arm of a side wherein, and second millimeter wave transceiver 3, the second millimeter wave switch aerial array 8 are suspended on the swivel arm of opposite side.The swivel arm that first and second scanning areas adopt closed transparent safeguard structure will be fixed with millimeter wave switch aerial array respectively seals wherein.After personnel to be tested 14 is got into by inlet 11; Stand still in regional 15 center to be scanned; The security staff is through controlling computing machine 13 trigger sweeps instruction; Rotation sweep drive unit 6 drive installation under the control of control device 4 is treated the parallel cylinder rotation sweep of scanning area 15 in millimeter wave transceiver 2 and 3, the millimeter wave switch aerial array 7 and 8 of swivel arm in two scanning areas 9 and 10 of the safe examination system main body frame that is placed in.After accomplishing scanning, the personnel to be tested is left by outlet 12.
The first millimeter wave switch aerial array 7 and the second millimeter wave switch aerial array 8 are driven by said rotation sweep drive unit 6, carry out the subtend rotation along first scanning area 9 and second scanning area 10 respectively, and each swivel arm slewing area for example is 120 degree.Because the lobe that the detectable signal of each antenna element institute radiation of millimeter wave switch aerial array forms is enough to cover the personnel's to be measured space of 360 degree on every side; Therefore both sides millimeter wave switch aerial array also line scanning is simultaneously carried out 360 degree circular scans compared with single millimeter wave switch aerial array and can be shortened sweep time greatly.
As shown in Figure 5, rotation sweep drive unit 6 also comprises grating angle information output unit 33.Grating angle information output unit 33 is to utilize grating to confirm the column scan switching position on the horizontal circumferencial direction, to control device 4 angular position information is provided, thereby confirms the work schedule of the vertical and horizontal circumferencial direction millimeter wave detection of antenna wave beam.
Millimeter wave transceiver provides the step frequency continuous wave to millimeter wave switch aerial array.The step frequency continuous wave here is continuous and the ripple of frequency step.Typical operating frequency range is 12 to 50GHz; Interval between the Frequency point is that step value is confirmed according to the target area scope; Such as 50MHz, 100MHz or 200MHz etc., export the detectable signal of the continuous wave of tens of nanosecond time span at each frequency millimeter wave transceiver.According to shown in Figure 3; Millimeter wave transceiver comprises: high stability crystal oscillator 16, first frequency synthesizer 17 and second frequency synthesizer 20, first converter unit 18 and second converter unit 21, first directional coupler 19 and second directional coupler 22; First frequency mixer 23 and second frequency mixer 24, quadrature demodulator 25, data acquisition unit 26 and timing control unit 27.Wherein, first frequency synthesizer 17 has tens of nanosecond frequency agility rate speed with second frequency synthesizer 20, and the present invention can use Direct Digital Frequency Synthesizers (DDS) or voltage controlled oscillator (VCO); Data acquisition unit 26 for example utilizes the collection of AD acquisition mode.
High stability crystal oscillator 16 output reference time signals also divide two-way to offer first frequency synthesizer 17 and second frequency synthesizer 20 respectively; Through first frequency synthesizer 17 output emission detection baseband signals, export with reference to baseband signal through second frequency synthesizer 20.The emission detection baseband signal becomes the emission detection signal of millimeter wave band after through 18 frequency conversions of first converter unit; Become the reference signal of millimeter wave band after through 21 frequency conversions of second converter unit with reference to baseband signal.The emission detection signal is divided into two-way again through first directional coupler 19, and reference signal also is divided into two-way through second directional coupler 22.The transmission channel that the first via signal of emission detection signal sends millimeter wave switch aerial array to is used for the detection of a target, and the second road signal of emission detection signal and the second road signal of reference signal are used as through 24 mixing of second frequency mixer and receive with reference to baseband signal.The first via of reference signal with from the reception signal of the receiving cable of millimeter wave switch aerial array through first frequency mixer 23 mutually mixing as receiving baseband signal.Reception is passed through quadrature demodulator 25 demodulation with reference to baseband signal and receiving baseband signal, and gathers through data acquisition unit 26, obtains amplitude and the phase information of step frequency probing wave under each Frequency point to the personnel to be tested.More than all parts receive 27 controls of the inner timing control unit of millimeter wave transceiver, thereby realize that the scanning on the vertical direction switches.
The transmission channel of the millimeter wave switch aerial array of being mentioned among this paper is meant transmission antenna unit, and receiving cable is meant the receiving antenna unit, specifies to see also hereinafter.
As shown in Figure 4, millimeter wave switch aerial array is made up of a plurality of antenna elements, comprises transmission antenna unit 28 that is used to transmit and the receiving antenna unit 29 that is used to receive signal.Millimeter wave switch aerial array is a bistatic; Transmission antenna unit 28 (being called for short bill unit) and receiving antenna unit 29 (be called for short and receive the unit) are arranged according to the staggered order of transmitting-receiving; And uniformly-spaced arrange between each antenna element; Be uniformly-spaced to arrange between the bill unit, receive between the unit and uniformly-spaced arrange, uniformly-spaced staggered arranging between bill unit and the receipts unit.
The form of antenna comprises electromagnetic horn and/or dielectric rod antenna form.Through sending out, receive the alternating expression transmitting-receiving control of antenna element, can realize treating the high density detecting beam scanning of scanning area 15 vertical directions.
Switch in the millimeter wave switch aerial array is that hilted broadsword is thrown the stacked combination form more; Like typical 256 cell arrays by 32 one-level hilted broadsword eight throw switches; 4 secondary hilted broadsword eight throw switches and 1 three grades hilted broadsword four throw switches constitute, and the antenna element of accomplishing the aerial array in the vertical direction switches.
In safe examination system of the present invention, the work schedule of safety check process is as shown in Figure 6, and process is following:
Step 1, after S35, the system power-up in the system each several part accomplish self check, if any fault then S36, through controlling computing machine 13 display system failure messages and maintenance, then get into step 2 like non-fault.
Step 3, system get into safety check scanning work state, and personnel to be tested 14 vertically stands still in regional 15 central authorities to be scanned after being got into by system entry 11.S40, by the security staff through controlling computing machine 13 trigger sweeps instructions.S41, rotation sweep drive unit 6 are installed in first and second millimeter wave transceiver, first and second millimeter wave switch aerial array on the swivel arm 32 in drive under the control of control device 4; In first and second scanning area of safe examination system main body frame that is placed in, treat the cylinder rotation sweep of scanning area 15; The column scan switching position that the grating angle information output unit 33 of millimeter wave switch aerial array through rotation sweep drive unit 6 confirmed on the horizontal circumferencial directions, the scanning that the timing control unit 27 through millimeter wave transceiver is implemented on the vertical sweep direction is switched.The scan-data of each antenna element that the data acquisition unit 26 in the millimeter wave transceiver is gathered is sent into parallel image treating apparatus 5 promptly in the probing wave amplitude and the phase information of each locus and frequency.S42, parallel image treating apparatus 5 utilize the system calibration data that obtain among the S39, to the personnel to be tested's 14 that collects among the S41 scan-data handle, image shows and dangerous suspicious object identification and indicating.
The typical implementation procedure of S42 is as shown in Figure 7; Comprise: S44, cylinder two-dimensional fast fourier transform (" Fast Fourier Transform (FFT) " is called for short FFT); S45, cylinder deconvolution (one dimension FFT), S46, polar coordinates-rectangular coordinate interpolation, S47, three-dimensional Fast Fourier Transform Inverse (FFTI) (IFFT).And then be as shown in Figure 8, and accomplish the dangerous suspicious object on it is discerned and indicated through the typical active millimeter wave 3D hologram gray level image of imaging output.
In addition, native system breaks down in above arbitrary steps, then step 34, trigger and reset (reset) order and get into the System self-test of step 1 by controlling computing machine 13.
Through safe examination system being designed to the channel-type structure; Take the mode of two row switch aerial array subtend rotation sweep concurrent workings; Reduced switch aerial array angle rotating range; Shorten the rotation sweep detection time more than one times, avoid human body the wobble effects image quality during long scanning probe, to occur.Yet because two row subtend antenna distances nearer (in the basic 1m); Adopt the column synthetic aperture technique to carry out the antenna beam broad of near field detection (30～60 degree); And adopt the working method work of step frequency continuous wave, will cause between the two array antenna arrays subtend to disturb bigger.
According to a preferred embodiment of the present invention; The first millimeter wave switch aerial array and the second millimeter wave switch aerial array adopt frequency division concurrent working mode; In scan period; The frequency of operation of the detectable signal that the detectable signal that the arbitrary moment first millimeter wave transceiver 2 provides and second millimeter wave transceiver 3 provide keeps difference during whole rotation sweep, keep the difference on the frequency that equates between the frequency of operation of two millimeter wave transceivers.Because the millimeter wave transceiver of system of the present invention adopts the step frequency continuous wave to carry out detection scanning; And first millimeter wave transceiver 2 all adopts identical frequency steps long value with second millimeter wave transceiver 3; Like 0.1GHz; Therefore the frequency of operation with the step frequency continuous wave of the frequency of operation of the step frequency continuous wave of first millimeter wave transceiver 2 and second millimeter wave transceiver 3 uniformly-spaced staggers; Working frequency points representative value like first millimeter wave transceiver 2 is: 30GHz, 30.1GHz, 30.2GHz, 30.3GHz ..., 39.9GHz, 40GHz; The working frequency points representative value of second millimeter wave transceiver 3 is: 30.05GHz, 30.15GHz, 30.25GHz ..., 38.5GHz, 39.5GHz; Frequency between each frequency differs and remains 50MHz; Then make the frequency of the detectable signal of the first millimeter wave switch aerial array 7 and the 8 difference radiation of the first millimeter wave switch aerial array during whole rotation sweep, all keep equal difference, so that the concurrent working as far as possible without interfering with each other each other of two-sided array antenna.
According to a further advantageous embodiment of the invention, the first millimeter wave switch aerial array and the second millimeter wave switch aerial array can adopt empty branch mode parallel.In scan period, the detection of antenna element highly keeps difference in the arbitrary moment first millimeter wave switch aerial array 7 and the second millimeter wave switch aerial array 8, remains identical difference in height between the parallel scanning position of subtend.Concrete grammar is: as shown in Figure 8; For each millimeter wave switch aerial array; Can it be divided into two parts up and down; Promptly; The first millimeter wave switch aerial array 7 being equally divided into first the first half 81 and first the latter half 82, the second millimeter wave switch aerial array 8 is equally divided into second the first half 83 and second the latter half 84, is 256 like the number that has antenna element separately of the first millimeter wave switch aerial array 7 and the first millimeter wave switch aerial array 8; Then first the first half 81 of the first millimeter wave switch aerial array 7, first the latter half 82, second the first half 83 of the second millimeter wave switch aerial array 8 and the antenna element number of second the latter half 84 are 128, promptly from the 128th antenna element of the 1st antenna element to lower side of top side.
Then work schedule for example can be arranged like this: first the first half 81 of the first millimeter wave switch aerial array 7 for from the 1st antenna element of top side progressively to the 128th antenna element scanning probe of this part, simultaneously second the latter half 84 of the second millimeter wave switch aerial array 8 from the 1st antenna element of its top side progressively to the 128th antenna element scanning probe of this part.Then first the latter half 82 of the first millimeter wave switch aerial array 7 from the 1st antenna element of top side progressively to the 128th antenna element scanning probe of this part, simultaneously second the first half 83 of the second millimeter wave switch aerial array 8 from the 1st antenna element of its top side progressively to the 128th antenna element scanning probe of this part.
Perhaps; First the latter half 82 of the first millimeter wave switch aerial array 7 be from the 1st antenna element of top side progressively to the 128th antenna element scanning probe of this part, simultaneously second the first half 83 of the second millimeter wave switch aerial array 8 from the 1st antenna element of its top side progressively to the 128th antenna element scanning probe of this part.Then first the first half 81 of the first millimeter wave switch aerial array 7 from the 1st antenna element of top side progressively to the 128th antenna element scanning probe of this part, simultaneously second the latter half 84 of the second millimeter wave switch aerial array 8 from the 1st antenna element of its top side progressively to the 128th antenna element scanning probe of this part.
Perhaps; First the first half 81 of the first millimeter wave switch aerial array 7 be from the 128th antenna element of lower side progressively to the 1st antenna element scanning probe of this part, simultaneously second the latter half 84 of the second millimeter wave switch aerial array 8 from the 128th antenna element of its lower side progressively to the 1st antenna element scanning probe of this part.Then first the latter half 82 of the first millimeter wave switch aerial array 7 from the 128th antenna element of lower side progressively to the 1st antenna element scanning probe of this part, simultaneously second the first half 83 of the second millimeter wave switch aerial array 8 from the 128th antenna element of its lower side progressively to the 1st antenna element scanning probe of this part.
Perhaps; First the latter half 82 of the first millimeter wave switch aerial array 7 be from the 128th antenna element of lower side progressively to the 1st antenna element scanning probe of this part, simultaneously second the first half 83 of the second millimeter wave switch aerial array 8 from the 128th antenna element of its lower side progressively to the 1st antenna element scanning probe of this part.Then first the first half 81 of the first millimeter wave switch aerial array 7 from the 128th antenna element of lower side progressively to the 1st antenna element scanning probe of this part, simultaneously second the latter half 84 of the second millimeter wave switch aerial array 8 from the 128th antenna element of its lower side progressively to the 1st antenna element scanning probe of this part.
As long as highly differing the height that remains 128 antenna elements, its detection when carrying out scanning probe of both sides just can avoid subtend to disturb like this; Antenna lobe spatially not occur overlapping in the antennas operating unit separately at any one time for the millimeter wave switch aerial array that makes both sides, makes the concurrent working as far as possible without interfering with each other each other of two-sided array antenna.
The present invention can adopt frequency division mode, empty branch mode separately, also can the two be used in combination, and the imaging definition level of system is improved.
Embodiment of the above and said case study on implementation; Be one of case study on implementation of the present invention; Be not to limit practical range of the present invention,, all should be encompassed in the protection domain of patent of the present invention so the equivalence that all shapes according to patent of the present invention, structure and principle and method are done changes with this.Should be appreciated that the above detailed description of technical scheme of the present invention being carried out by preferred embodiment is schematic and nonrestrictive.Those of ordinary skill in the art is reading on the basis of instructions of the present invention and can make amendment to the technical scheme that each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.Protection scope of the present invention is only limited the claims of enclosing.
Claims (8)
1. the human body security check system of the active 3D hologram imaging of a millimeter wave is characterized in that this system comprises:
Have the cylindrical body framework (1) of gateway, form first scanning area (9), second scanning area (10) and zone to be scanned (15);
First millimeter wave transceiver (2) and second millimeter wave transceiver (3);
The first millimeter wave switch aerial array (7) that is connected with said first millimeter wave transceiver (2) is with the second millimeter wave switch aerial array (8) that is connected with said second millimeter wave transceiver (3);
Rotation sweep drive unit (6) is used to drive the rotation of said first millimeter wave switch aerial array (7) and said second millimeter wave switch aerial array (8) subtend;
Control device (4); Be used to control the rotation sweep drive unit and first and second millimeter wave transceivers (2; 3) make the first and second millimeter wave switch aerial arrays (7,8) respectively in first and second scanning areas (9,10) to said zone to be scanned (15) the cylinder rotation sweep that walks abreast; And
The parallel image treating apparatus is used for according to synthesizing personnel to be tested's 3D hologram image from the image data of first and second millimeter wave transceivers and the spatial positional information of this image data.
2. the human body security check system of the active 3D hologram imaging of millimeter wave according to claim 1 is characterized in that,
Said rotation sweep drive unit (6) comprises two symmetrically arranged swivel arms (32), and the said first millimeter wave switch aerial array (7) and the second millimeter wave switch aerial array (8) are separately positioned on the said swivel arm.
3. the human body security check system of the active 3D hologram imaging of millimeter wave according to claim 1 is characterized in that,
Said rotation sweep drive unit (6) comprises grating angle information output unit (33), is used to export the rotation angle information of the said first and second millimeter wave switch aerial arrays (7,8).
4. the human body security check system of the active 3D hologram imaging of millimeter wave according to claim 1 is characterized in that,
The rotating range of said first millimeter wave switch aerial array (7) and the rotation of said second millimeter wave switch aerial array (8) subtend is 120 degree.
5. the human body security check system of the active 3D hologram imaging of millimeter wave according to claim 3 is characterized in that,
Said first and second millimeter wave transceivers comprise timing control unit (27) respectively; Said millimeter wave switch arrays antenna is confirmed the column scan position on the horizontal circumference direction of scanning through said grating angle information output unit (33), switches through the scanning that said timing control unit (27) is implemented on the vertical sweep direction.
6. the human body security check system of the active 3D hologram imaging of millimeter wave according to claim 1 is characterized in that,
Millimeter wave switch aerial array comprises a plurality of receiving antennas unit and corresponding a plurality of transmission antenna unit, and receiving antenna unit and transmission antenna unit apportion are staggered, and uniformly-spaced arrange between each antenna element.
7. the human body security check system of the active 3D hologram imaging of millimeter wave according to claim 1 is characterized in that,
Said antenna is electromagnetic horn and/or dielectric rod antenna, and said switch is that hilted broadsword is thrown the stacked combination form more and is used for the switching to antenna element.
8. the human body security check system of the active 3D hologram imaging of millimeter wave according to claim 1 is characterized in that,
Each millimeter wave transceiver provides the step frequency continuous wave to corresponding millimeter wave switch aerial array, and operating frequency range is 12 to 50GHz.
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