CN109782366A - Multiple-input multiple-output aerial array arrangement, human body safety check device and method for active millimeter wave safety check imaging - Google Patents
Multiple-input multiple-output aerial array arrangement, human body safety check device and method for active millimeter wave safety check imaging Download PDFInfo
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Abstract
Embodiment of the disclosure discloses a kind of sparse multiple-input multiple-output array arrangement, human body safety check equipment and human body safety check method for active millimeter wave safety check imaging.One group of transmitting antenna of multiple-input multiple-output array arrangement to include for launch wavelength be millimeter wave and for receives be by the wavelength of human body reflection millimeter wave one group of receiving antenna.Transmitting antenna is arranged along the first row, and receiving antenna is arranged along the second row, and the first row is parallel to the second row and is spaced apart.More than two receiving antenna is accordingly arranged between two adjacent transmitting antennas.
Description
Technical field
Embodiment of the disclosure is related to human body safety check field, in particular to for millimeter wave including multiple-input multiple-output antenna array
Column and human body safety check device and method.
Background technique
The current form of anti-terrorism both at home and abroad is increasingly serious, terrorist carried in the way of concealment gun, cutter and
The dangerous material such as explosive, drugs constitute great threat to space safety.The features such as airport, railway station occasion human body safety check
Technology has obtained the great attention of traffic management department, various countries.
Have in the prior art based on active millimeter wave Terahertz human body imaging technique.The technical work principle is equipment
First to human body radiation millimeter wave, the millimeter wave after human body or suspicious item scattering is then received by detector, passes through weight
Algorithm is built human body is imaged.However, computationally intensive, image taking speed is slower.The transmitting millimeter wave and detection millimeter wave used
Antenna it is more, the device is complicated, and manufacture difficulty is big.
Summary of the invention
According to the one side of the disclosure, embodiment of the disclosure provides a kind of for the dilute of active millimeter wave safety check imaging
Multiple-input multiple-output array arrangement is dredged, including for one group of transmitting antenna of millimeter wave and being used to receive by described one group for launch wavelength
The wavelength of transmitting antenna transmitting reflected by human body is one group of receiving antenna of millimeter wave；
Wherein, one group of transmitting antenna includes multiple transmitting antennas along the first row arrangement, one group of receiving antenna
Including the multiple receiving antennas arranged along the second row, multiple transmitting antennas of the first row of one group of transmitting antenna are parallel to institute
Multiple receiving antennas of second row of one group of receiving antenna are stated, and one group described in one group of transmitting antenna and the second row described in the first row
Receiving antenna is spaced apart, and is generally aligned in the same plane；
Wherein, the phase of the second row corresponding with the gap length between two adjacent transmitting antennas that the first row arranges
The quantity that at least one receiving antenna makes the quantity of transmitting antenna be less than receiving antenna is arranged within the scope of equal length.
In one embodiment, at least one transmitting antenna is aligned the company so that between the two at least one receiving antenna
Direction of the line perpendicular to one group of transmitting antenna or the row of one group of receiving antenna.
In one embodiment, the line and one group of transmitting of any one transmitting antenna and any one receiving antenna
The direction of the row of antenna or one group of receiving antenna is angled.
In one embodiment, the multiple transmitting antenna is opened with the distance interval of the integral multiple of the wavelength of radiated wave, institute
Multiple receiving antennas are stated to open with the distance interval of the wavelength of one times of radiated wave.
In one embodiment, multiple transmitting antennas are with the distance interval of the wavelength of 2 times, 3 times, 4 times or 5 times of radiated wave
It opens.
In one embodiment, a transmitting antenna of one group of transmitting antenna and one group of receiving antenna near
The midpoint of one line is counted as the virtual of this pair of of transmitting antenna-receiving antenna in close corresponding multiple receiving antennas
Displaced phase center, the distance between adjacent displaced phase center are the half of the wavelength of radiated wave.
In one embodiment, one group of transmitting antenna described in the first row is spaced apart with one group of receiving antenna described in the second row
Distance is less than the 10% of image-forming range.
In one embodiment, described in the first transmitting antenna and the second row of one group of transmitting antenna described in the first row one group connect
The first receiving antenna for receiving antenna, which misplaces, to be arranged.
In one embodiment, sparse multiple-input multiple-output array arrangement further includes control switch, for controlling one group of hair
It penetrates antenna and successively emits millimeter wave.
In one embodiment, sparse multiple-input multiple-output array arrangement is configured to: one group of transmitting antenna can be along first
Row arrangement multiple transmitting antennas one by one successively transmitting radiated wave complete one group of transmitting antenna one-dimensional scanning, and can along with
Human body two-dimensional scanning is completed in the orthogonal direction displacement in the direction of the row of one group of transmitting antenna, and can be become based on Fourier
The synthetic aperture Holographic Algorithm changed completes imaging.
In one embodiment, it is holographic to be configured to the synthetic aperture based on Fourier transformation for sparse multiple-input multiple-output array arrangement
Algorithm once completes image reconstruction, imaging formula to correct imaging region are as follows:
Wherein, σ (x, y) is the scattering coefficient of human body, R0It is image-forming range, FT2DFor two-dimensional Fourier transform,It is two
Inverse Fourier transform is tieed up, j is imaginary unit, and k is propagation constant, kx、kyIt is space propagation constant respectively；
The echo-signal of human body is received for a pair of of transmitting antenna-receiving antenna combination；KωFor the sky of stepped frequency radar
Between frequency；For a point target in target area, I indicates to be located at I (xn, yn) at scattering point target, define I and hair
Penetrate antenna AtDistance be RT, n, I and receiving antenna ArBetween distance be RR, n。
An aspect of this disclosure provides a kind of sparse multiple-input multiple-output array cloth for active millimeter wave safety check imaging
Set, including for launch wavelength be millimeter wave multirow transmitting antenna arranged in parallel and for receives by human body reflection wavelength
For the multirow receiving antenna arranged in parallel of millimeter wave, every a line transmitting antenna includes multiple transmitting antennas, and every a line receives day
Line includes multiple receiving antennas；
The multirow transmitting antenna is parallel to the multirow receiving antenna；The multirow transmitting antenna and the multirow receive
Antenna is separated from each other；
Wherein, a line transmitting antenna in multirow transmitting antenna and a line receiving antenna in multirow receiving antenna are constituted such as
Above-mentioned sparse multiple-input multiple-output array arrangement.
The one side of the disclosure provides a kind of human body safety check equipment, including one or more above-mentioned sparse multiple-input multiple-output battle arrays
Column arrangement.
In one embodiment, sparse multiple-input multiple-output array described in any one of one or more claim 1-11 or 12
Arrangement includes the first sparse multiple-input multiple-output array arrangement and the second sparse multiple-input multiple-output array arrangement, wherein first is sparse multiple more
It receives array arrangement and the second sparse multiple-input multiple-output array arrangement is relatively arranged to limit implementation human body safety check therebetween
Inspection space, and the first sparse multiple-input multiple-output array arrangement and the second sparse multiple-input multiple-output array arrangement are configured to
It is translated along the vertical direction in perpendicular to implement to scan.
In one embodiment, human body safety check equipment further include:
First frame, the first sparse multiple-input multiple-output array be arranged on the first frame can on the first frame on move down
It is dynamic；With,
Second frame, the second sparse multiple-input multiple-output array be arranged on the second frame can on the second frame on move down
It is dynamic；
Wherein, the first track-type facilities are set on the first frame, and the first sparse multiple-input multiple-output array is arranged to slide
Mode is connected to first track-type facilities so as to move along first track-type facilities to carry out first to human body and sweep
It retouches；Second track-type facilities are set on the second frame, and the second sparse multiple-input multiple-output array arrangement is connected in a manner of it can slide
Second track-type facilities are connected to so as to move along second track-type facilities to carry out the second scanning to human body.
In one embodiment, human body safety check equipment further include:
Driving device, for driving the described first sparse multiple-input multiple-output array arrangement to move along first track-type facilities
And/or the sparse multiple-input multiple-output array arrangement of driving described second is moved along second track-type facilities；With
Restraint device, the restraint device for constraining, arrange and described second is dilute by the described first sparse multiple-input multiple-output array
The movement relation of multiple-input multiple-output array arrangement is dredged so that the first sparse multiple-input multiple-output array is arranged and described second is sparse more
Hair array arrangements of receiving can only move more in opposite direction.
In one embodiment, the restraint device is connection the first sparse multiple-input multiple-output array arrangement and described the
The connecting line band of the rigidity of two sparse multiple-input multiple-output array arrangements；
Wherein, first track-type facilities are equipped with the first fixed pulley, and second track-type facilities are equipped with the second fixed pulley, institute
Connecting line band is stated successively to be connected to by the first fixed pulley and the second fixed pulley from the described first sparse multiple-input multiple-output array arrangement
The second sparse multiple-input multiple-output array arrangement.
In one embodiment, human body safety check equipment includes: first driving device, and it is sparse multiple to directly drive described first
Receive array arrangement, the first sparse multiple-input multiple-output array is arranged through first driving device and is connected to the first track-type facilities more；
With, the second driving device, the described second sparse multiple-input multiple-output array arrangement, the second sparse multiple-input multiple-output array are directly driven
It is arranged through the second driving device and is connected to the second track-type facilities.
In one embodiment, the first sparse multiple-input multiple-output array arrangement is by lowest frequency to most high-frequency emission millimeter wave, the
Two sparse multiple-input multiple-output arrays arrangements by most high frequency to lowest frequency millimeter wave, alternatively, the second sparse multiple-input multiple-output array arrange by
Lowest frequency is to most high-frequency emission millimeter wave, the first sparse multiple-input multiple-output array arrangement by most high frequency to lowest frequency millimeter wave.
The one side of the disclosure provides a kind of using if above-mentioned human body safety check equipment is to the method for human body examinations.
Detailed description of the invention
Fig. 1 shows a kind of schematic diagram of one-dimensional single-shot list receipts aerial array；
Fig. 2 shows a kind of schematic diagrames of one-dimensional multiple-input multiple-output aerial array；
Fig. 3 shows multi-emitting antenna-more receiving antennas working principle diagram；
Fig. 4 shows the schematic diagram of the sparse multiple-input multiple-output array arrangement of one embodiment of the disclosure, wherein transmitting antenna
Between spacing be 4 λ；
Fig. 5 shows the schematic diagram of the sparse multiple-input multiple-output array arrangement of one embodiment of the disclosure, wherein transmitting antenna
Between spacing be 4 λ；
Fig. 6 A, 6B show the schematic diagram of the sparse multiple-input multiple-output array arrangement of one embodiment of the disclosure, wherein emitting
Spacing between antenna is 3 λ；
Fig. 7 A, 7B show the schematic diagram of the sparse multiple-input multiple-output array arrangement of one embodiment of the disclosure, wherein emitting
Spacing between antenna is 2 λ；
Fig. 8 A, 8B show the schematic diagram of the sparse multiple-input multiple-output array arrangement of one embodiment of the disclosure, wherein emitting
Spacing between antenna is 5 λ；
Fig. 9 shows the human body safety check equipment of one embodiment of the disclosure；
Figure 10 shows the human body safety check equipment of one embodiment of the disclosure, including driving device and restraint device；
Figure 11 shows the human body safety check equipment of one embodiment of the disclosure, does not include restraint device；
Specific embodiment
Although the disclosure allows various modifications and interchangeable form, its specific embodiment passes through example
Mode is shown in the accompanying drawings, and will be described herein in detail.It should be appreciated, however, that the attached drawing of accompanying and detailed retouching
It states and is not configured to the disclosed concrete form that is restricted to of the disclosure, but on the contrary, be to cover the right fallen by being appended
It is required that all modifications, equivalent form and alternative forms in the spirit and scope of the present disclosure limited.Attached drawing be in order to illustrate,
Thus draw not to scale.
The terms such as "upper", "lower", "left", "right" have been used in the present specification, are not intended to limit the absolute of element
Orientation, but help to understand to describe the relative position of element in the view；" top side " and " bottom side " is phase in this specification
For under normal circumstances, the orientation of the upright the upper side and lower side of object；" first ", " second " etc. are also not to sort, but
In order to distinguish different components.
Multiple embodiments according to the disclosure are described with reference to the accompanying drawings.
First introduce some basic knowledge of the millimeter wave human body safety check for embodiment of the disclosure.Active millimeter wave
Human body safety check equipment is generally received at present using one-dimensional single-shot list or quasi- single-shot list receives aerial array synthetic aperture imaging principle.Ginseng
According to Fig. 1, dual-mode antenna (transmitting antenna-receiving antenna) unit is indicated in Fig. 1 intermediate cam shape, indicates transmitting antenna, R with T
Indicate that receiving antenna, TR indicate transmitting antenna-receiving antenna unit.It needs on aperture length direction in imaging according to half-wavelength
Spacing principle, is equidistantly spaced from actual dual-mode antenna unit, dual-mode antenna unit rear end (not shown) by high-speed switch with
Transceiver is connected, and first dual-mode antenna unit combines data acquisition of completion with transceiver by switch, by opening
Concern is changed, and is controlled second dual-mode antenna unit and is combined by switch with transceiver, then completes a data acquisition, is successively controlled
System switch from first dual-mode antenna unit is switched to n-th dual-mode antenna unit, can complete the acquisition of N group data, acquisition at
As the data information of required N number of equivalent unit.
The antenna element one-dimensional array imaging mode of transceiver or bistatic is the disadvantage is that need the antenna of substantial amounts
Resource, in order to realize the sampling of N number of antenna element, transceiver aerial array needs N number of antenna element, bistatic antenna
Array needs 2N antenna element, and dual-mode antenna utilization rate is very low；In addition, since antenna unit array realization needs antenna element
Number is more, and antenna element spacing needs to meet Nyquist and uses theorem, i.e. antenna element interval half-wavelength pitch requirements, when
When working frequency is lower, physics realization difficulty is little, but with the raising of working frequency, realizes that difficulty will be stepped up.
Nyquist refers to that the number of samples needed along aperture is determined by several factors using theorem, including wavelength, hole
Diameter size, target size and range-to-go.If being less than π from a sampled point to the phase shift of next sampled point,
Meet Nyquist rule.The worst situation will be, target very close to aperture and sampled point close to aperture edge.It is right
In space samples interval Ax, the worst situation will be that phase shift is no more than 2k Δ x.Therefore, sampling rule can indicate are as follows:
Δ x < (λ/4)
Wherein, λ=2 π/k is wavelength.
This result requires strictly than common, because target (such as human body) usually range aperture is closer, antenna
Beam angle is usually less than 180 degree.Based on this reason, the magnitude of sampling interval that the imaging system of application generallys use in λ/2.
It is compared by taking working frequency 24-30GHz and 70-80GHz as an example, corresponding wavelength is respectively 10mm and 4mm,
Realize one-dimensional array shown in Fig. 1, then requiring dual-mode antenna spacing is respectively 5mm and 2mm, it is assumed that antenna aperature length is 1m
When, transceiver aerial array is respectively necessary for 200 and 500 antenna elements, and bistatic aerial array needs 400 and 1000
Antenna element.It can be seen that the increase antenna spacing with frequency becomes smaller, required number of antennas is sharply increased.Antenna spacing becomes smaller
So that design and the array layout design of antenna element all have great difficulty, while it also will limit dual-mode antenna performance.
The increase of number of antennas, not only increases hardware cost, increases the complexity of system, and data volume increases, acquisition time
Become.Therefore, the application in terms of safety check is imaged in high frequency millimeter wave (50GHz-300GHz) human body of one-dimensional array shown in Fig. 1 is realized
Feasibility is not high, does not have Project Realization value.
Fig. 2 shows a kind of antenna arrangement modes of sparse distribution multiple-input and multiple-output, and wherein T indicates that transmitting antenna, R indicate
Receiving antenna has disadvantage although this antenna arrangement mode can reduce the number of antenna: for example, due to equivalent phase
Center and dual-mode antenna can only use back-projection algorithm, and back-projection algorithm calculating speed is slow, image reconstruction apart from larger
Time is long.Rear orientation projection is a kind of accurate imaging calculation based on signal procesing in time domain originating from computed tomography
Method.Its basic thought is to imaging point each in imaging region, by calculating the point to the delay between sending and receiving antenna, by institute
Have echo to its contribution coherent superposition to obtain the point corresponding pixel value in the picture, in this way to entire imaging region by
Point ground carries out coherent superposition processing, can be obtained the image of imaging region.This algorithm it is maximum the disadvantage is that need to entirely at
As section, each point is rebuild, and reconstruction speed is slow, and time-consuming；In addition, the receiving antenna at both ends is dense distribution, interval need to expire
Sufficient Nyquist uses theorem.Such as 170GHz-260GHz frequency range, typical transmitting antenna and receiving antenna bore are 10.8mm,
And a length of 1.36mm of the corresponding half-wave of centre frequency.Obviously, this antenna element mode is unsuitable.A kind of solution is just
It is sparse receiving antenna, so that displaced phase center interval is grown up than half-wave, but antenna samples deficiency will lead to reconstruction image
Artifact it is serious.
To solve above-mentioned deficiency, the disclosure proposes a kind of sparse multiple-input multiple-output array arrangement, passes through multiple-input multiple-output battle array
Column rarefaction design and control technology can greatly improve acquisition speed and antenna element utilization rate；It is complete along array direction
Realize that electric scanning (passes through the Antenna Operation one by one of switch control antenna or uses one by one by switch control antenna in ground
Frequency scanning), it is not necessarily to mechanical scanning, may be implemented quickly to scan, improves image taking speed；And it can be using based in quick Fu
The algorithm for reconstructing of leaf variation, and then significantly improve reconstruction speed；Hardware complexity is reduced simultaneously, improves engineering realizability.
In accordance with an embodiment of the present disclosure, a kind of sparse multiple-input multiple-output array cloth for active millimeter wave imaging is provided
It sets, wherein controlling by the way that single station is equivalent with electric switch, equivalent unit spacing is arranged to be slightly larger than or be equal to working frequency pair
The half of wavelength is answered, the equivalent unit is displaced phase center.
For convenience of explanation, a kind of multiple-input multiple-output system is shown referring to Fig. 3, member X-Y coordinate system is set in x-axis
Upper setting is sparse to carry out transmitting-receiving combination, uses At(xt, yt) and Ar(xr, yr) respectively indicate a pair of of combined transmitting antenna of transmitting-receiving and connect
Receive the position coordinates at antenna and its place.
For a point target in target area, I indicates to be located at I (xn, yn) at scattering point target, define I and hair
The distance for penetrating antenna At is RT, n, I between receiving antenna Ar at a distance from be RR, n, R0Between target area center and linear array
Vertical range namely image-forming range.
Echo-signal after passing point target scattering can be expressed as
Sn(xt, yt；xr, yr；Kω)=σ (xn, yn)eXp[-jKω(RT, n+RR, n)]
Wherein, σ (x, y) is the scattering coefficient of human body, KωFor the spatial frequency of stepped frequency radar, j is imaginary unit.
A is combined for transmitting-receivingtArReceive the echo-signal of target area are as follows:
Wherein D is imaging region.
Transmitting and the equivalent position for receiving signal can be indicated that the equivalent position is two only by the phase center of antenna
The physical centre in vertical antenna or aperture.In multiple-input multiple-output system, a transmitting antenna corresponds to multiple receiving antennas, the disclosure
Embodiment in, receiving antenna unit and transmission antenna unit are arranged to be not at same position, this transmitting and reception day
A virtual system simulation can be used in the system of space of lines separation, in virtual system, in each group of transmitting and receives day
A virtual location is added between line, this position is referred to as displaced phase center.Dual-mode antenna combines number of echoes collected
According to can be equivalent to its displaced phase center Ae (xe, ye) position internal loopback antenna echo collected.
The transmitting-receiving is combined, the relationship of physical coordinates can indicate between each antenna are as follows:
Using displaced phase center principle, equivalent echo signal can be indicated are as follows:
Principle is arranged according to the sparse multiple-input multiple-output array of the above-mentioned active millimeter wave imaging of the disclosure, and Fig. 4 is shown
One embodiment.Sparse multiple-input multiple-output array arrangement in Fig. 4 can specifically be constructed by following steps:
First according to imaging indicators parameter such as working frequency (wavelength X), aerial array length, that is, antenna aperature Lap etc.
It is required that determining required equivalent unit number N and interval d；
Then, actual antennas unit is arranged according to bistatic mode, transmitting antenna/receiving antenna is respectively according to mutually flat
Two capable lineal layouts, are divided into dtr；
Then, the arrangement of transmission antenna unit is designed, transmitting antenna sum Nt is arbitrary number, is determined by antenna aperature Lap；
The spacing of each transmitting antenna is that M λ (is in the present embodiment 4 λ)；
Next, the arrangement of design receiving antenna unit, receiving antenna sum are arbitrary number Nr, receiving antenna equidistantly divides
Cloth, spacing λ.
The sparse multiple-input multiple-output array arrangement of active millimeter wave safety check imaging is configured to according to above step, including
For one group of transmitting antenna that launch wavelength is millimeter wave and for receive by the wavelength that human body reflects is millimeter wave one group connect
Receive antenna.In the present embodiment, one group of transmitting antenna includes multiple transmitting antennas along the first row arrangement, and described one group connects
Receiving antenna includes multiple receiving antennas along the arrangement of the second row, and one group of transmitting antenna described in the first row is parallel to one described in the second row
Group receiving antenna, and one group of transmitting antenna described in the first row is spaced apart with one group of receiving antenna described in the second row, and is located at same
Plane；Wherein, accordingly arrangement is more than two to the gap length in the first row between two adjacent transmitting antennas in a second row
A receiving antenna, so as to reduce the quantity of receiving antenna, the quantity ratio of transmitting antenna while guaranteeing image definition
The quantity of receiving antenna is few, to reduce total number of elements, thus reduces manufacture difficulty and cost.
It, can be there are many form when sparse multiple-input multiple-output array arranges work.For example, in one embodiment, first
Capable multiple transmitting antennas one by one/stepping electromagnetic signals from left to right (that is, since the transmitting antenna of one end),
The electromagnetic wave signal of each transmitting antenna is received and (is guaranteed in equivalent phase near its such as 6 or 8 receiving antennas
Half-wavelength is divided between the heart).The transmitting that finally all transmitting antennas complete a signal completes the scanning of a line.
In one embodiment, (for example) another working forms, multiple transmitting antennas of the first row emit the electricity of a frequency simultaneously
The signal of magnetostatic wave signal, each transmitting antenna transmitting is encoded, and the signal that receiving antenna receives will need to carry out after decoding
Image application completes the transmitting an of electromagnetic wave signal and receives to complete an one-dimensional scanning.In one embodiment, first
Capable multiple transmitting antennas one by one/stepping electromagnetic signals from left to right (that is, since the transmitting antenna of one end), often
The electromagnetic wave signal of a transmitting antenna is received near its such as 6 or 8 receiving antennas, and transmitting antenna transmitting
The frequency of electromagnetic wave signal is gradually increased.The transmitting that finally all transmitting antennas complete a signal completes sweeping for a line
It retouches.In one embodiment, (for example) there are also a kind of working forms, transmitting is electric one by one from left to right for the multiple transmitting antennas of the first row
Magnetostatic wave signal, after completing an one-dimensional scanning, after the first row transmitting antenna translates certain displacement in transverse direction, again by
The frequency of a electromagnetic signals, electromagnetic wave signal is different from previous transmission.
Transmitting antenna and receiving antenna can also have other working methods.
In one embodiment, at least one transmitting antenna is aligned the company so that between the two at least one receiving antenna
Direction of the line perpendicular to one group of transmitting antenna or the row of one group of receiving antenna；However, it should be understood that this is not must
Must.
However, in another embodiment, the line and described one of any one transmitting antenna and any one receiving antenna
The direction of the row of group transmitting antenna or one group of receiving antenna is angled；This can be advantageous, and can efficiently use
Space between transmitting antenna and neighbouring receiving antenna will not make a pair of of transmitting antenna lean on too close with receiving antenna.
In one embodiment (as example), multiple transmitting antennas are opened with the distance interval of the wavelength of 4 times of radiated wave.
One group of receiving antenna includes multiple receiving antennas, is opened with the distance interval of the wavelength of one times of radiated wave.Transmitting antenna and
Receiving antenna is in the case where meeting above-mentioned condition, the length or so-called aperture quantification arranged according to array.
Fig. 4 shows a kind of arrangement, a transmitting antenna of one group of transmitting antenna and one group of receiving antenna it is corresponding
The midpoint of the line of one receiving antenna is counted as the virtual displaced phase center of this pair of of transmitting antenna-receiving antenna, phase
The distance between adjacent displaced phase center is the half of the wavelength of radiated wave.It is square in Fig. 4 (following Fig. 5 is also similar)
It being connected between the receiving antenna that the transmitting antenna and circle R that shape T is indicated indicate with dotted line, the midpoint of T and R are indicated with triangle,
Triangle position means that virtual displaced phase center.One transmitting antenna can generally correspond to multiple receiving antennas, such as
One transmitting antenna can correspond to 3,4,5,6,7 or 8 receiving antennas, the i.e. signal that a transmitting antenna issues
It is received and identified by 3,4,5,6,7 or 8 receiving antennas near it.The actually signal of transmitting antenna
It may also be received by other receiving antennas, however in practical applications it is not intended that the signal of other receiving antennas, that is,
Say that each transmitting antenna implements measurement with fixed corresponding receiving antenna pairing.Have between every a pair of transmitting antenna-receiving antenna
There is a virtual displaced phase center, these virtual displaced phase centers, i.e. equivalent phase shown in triangle in Fig. 4
The distance that the position at center is separated from each other is the half of the wavelength of radiated wave.In order to reduce the number of transmitting antenna and receiving antenna
Amount, and the overlapping of displaced phase center is generally avoided, the distance between adjacent displaced phase center is the wavelength of radiated wave
It is approximately half of can satisfy finally constitute the distance between clearly image, such as adjacent displaced phase center be radiated wave
0.3 to 0.7 times of wavelength.In other words, the distance between adjacent displaced phase center is greater than the one of the wavelength of radiated wave
Half it is too many when, then may fogging image.
In accordance with an embodiment of the present disclosure, one group of receiving antenna interval described in one group of transmitting antenna and the second row described in the first row
The distance opened can be arbitrary, still, one group of receiving antenna interval described in one group of transmitting antenna and the second row described in the first row
The distance opened is as small as possible to be advantageous, because will cause displaced phase center condition (adjacent displaced phase center apart from excessive
The spacing half that is wavelength or half close to wavelength) it is invalid；However, in practical applications, will cause reality apart from too short
Existing difficulty, crosstalk and spatial arrangement not under problem.In one embodiment, one group of transmitting antenna and the second row described in the first row
One group of receiving antenna distance spaced apart is less than the 10% of image-forming range.
In one embodiment, sparse multiple-input multiple-output array arrangement further includes that can control switch, for controlling described one
Group transmitting antenna successively emits millimeter wave.
In one embodiment, sparse multiple-input multiple-output array arrangement is configured to successively emit by one group of transmitting antenna
Radiated wave completes the scanning of one group of transmitting antenna, by multiple-input multiple-output array arrangement along the side with the row of one group of transmitting antenna
To orthogonal direction displacement be gradually completing human body two-dimensional scanning；And the synthetic aperture Holographic Algorithm based on Fourier transformation is completed
Imaging.As shown in figure 4, emitting millimeter magnitude radiated wave since the transmitting antenna of first, left side, receiving antenna, which receives, returns to letter
Number, subsequent second transmitting antenna emits radiated wave, successively operates, and completes single pass.Then, upward or downward along paper
A step distance is moved in direction, repeats above-mentioned scanning again, gradually scans human body.
In one embodiment, it is holographic to be configured to the synthetic aperture based on Fourier transformation for sparse multiple-input multiple-output array arrangement
Algorithm once completes image reconstruction, imaging formula to correct imaging region are as follows:
Wherein, σ (x, y) is the scattering coefficient of human body, R0It is image-forming range, FT2DFor two-dimensional Fourier transform,It is two
Inverse Fourier transform is tieed up, j is imaginary unit, and k is propagation constant, kx、kyIt is space propagation constant respectively；
The echo-signal of human body is received for a pair of of transmitting antenna-receiving antenna combination；KωFor the sky of stepped frequency radar
Between frequency.
When work, by control switch, multiple transmitting antennas successively emit radiated wave.When the 1st transmitting antenna work, the
1 to the 4th receiving antenna acquires echo data；When the 2nd transmitting antenna work, the 1st to the 8th receiving antenna acquires number of echoes
According to；When the 3rd transmitting antenna work, the 5th to the 12nd receiving antenna acquires echo data；In turn, each transmitting antenna
Corresponding 8 receiving antennas acquire data；A to the last transmitting antenna, i.e. the Nt transmitting antenna, last 4 receptions day
Line acquires data.
After all transmitting antennas successively emit, primary lateral data acquisition is completed, (Nt-1) × 8 echo is finally obtained
Data.According to above-mentioned displaced phase center principle, these echo datas can be equivalent to (Nt-1) × 8 displaced phase center institute
Collected echo data.Also, it is divided into 0.5 λ between among these equivalent phases, meets nyquist sampling Law requirement
Equivalent member distribution.
Then synthetic aperture scanning is carried out in ary Quadrature direction, i.e. mechanical scanning is completed the scanning to two-dimentional aperture, swept
The step-length retouched also needs to meet using theorem, i.e. 0.5 λ of half-wavelength.
After completing two-dimentional aperture scanning, collected echo data can be expressed as S (xt, yt；xr, yr；Kω)。
Finally, may be implemented quickly to rebuild in conjunction with the synthetic aperture Holographic Algorithm changed based on fast Fourier, complete at
Picture.
The purpose of imaging algorithm is exactly the picture that target is finally inversed by from echo expression formula, i.e., target scattering coefficient σ (x,
Y), the synthetic aperture Holographic Algorithm based on Fourier transformation, without point-by-point to entire imaging region as subsequent projection algorithm
It rebuilds, but utilizes the advantage of Fast Fourier Transform (FFT), once correct imaging region is rebuild and is completed.Imaging formula are as follows:
Wherein R0 is image-forming range.
In another embodiment, as shown in figure 5, transmitting antenna array and receiving antenna array carry out dislocation design, emit
First antenna of the aerial array the left-hand side and first antenna spacing of the receiving antenna array the left-hand side are λ.
The sparse multiple-input multiple-output array arrangement proposed in the disclosure is based on single station principle of equal effects, i.e. array of designs passes through list
Stand control that is equivalent and combining control switch so that finally formed displaced phase center (be also referred to as in the disclosure equivalent unit or
Equivalent aerial unit) meet nyquist sampling law, it is, the finally formed equivalent aerial unit of dual-mode antenna array
Spacing is slightly larger than or is equal to the half of working frequency corresponding wavelength.Embodiment of the disclosure is according to mentioned above principle, it is contemplated that
High band millimetre wavelength is shorter, to take into account engineering realizability, while being controlled using array rarefaction design and array switch
Technology, it is final to realize the requirement of half-wave long spacing equivalent aerial cell distribution.
It is introduced by taking the design process of 63 transmitting antennas and 248 receiving antenna composition arrays as an example referring to Fig. 4
The sparse multiple-input multiple-output array method for arranging of the disclosure, those skilled in the art can introduction progress Sparse Arrays according to the present invention
The arrangement of column.
Firstly, according to imaging indicators parameter request, such as imaging resolution, sidelobe level parameter determine required equivalent list
First number and interval, that is, determine the distribution of equivalent virtual array.The interval of equivalent array element needs maximum to be slightly larger than or wait
In the half of operation wavelength.
Then, actual antennas unit is arranged according to bistatic mode, transmitting antenna/receiving antenna is respectively according to mutually flat
Two capable lineal layouts, straight line spacing can be arbitrary value, but small as far as possible (can be λ, 1.5 λ, 2 λ, 3 λ, 4 λ
Deng), it is reasonably selected with actual design antenna element size and array sizes design requirement, array sizes 1m design of the present invention.
Then, as shown in figure 4, the arrangement of design transmission antenna unit, transmitting antenna sum (are extended to other for 63
Meaning number, specific number are determined by factors such as imaging resolution, areas imagings), each transmitting antenna spacing is 4 λ.
Next, the arrangement of design receiving antenna unit, receiving antenna sum (is extended to any other number, has for 248
Body number is determined that each receiving antenna spacing is λ by factors such as imaging resolution, areas imagings.Transmitting antenna array and reception
Aerial array first place is to as shown in Figure 4 at that time.
In embodiment shown in Fig. 5, transmitting antenna array and the dislocation of receiving antenna array first place are designed, transmitting antenna array
First antenna of the left-hand side and first antenna spacing of the receiving antenna array the left-hand side are that λ (can be any other value, generally be taken as
Arbitrary value between [- 5 λ, 5 λ]).
When work, first transmitting antenna carries out difference to preceding answering a receiving antenna of M/2 (i.e. 4)；Second to Nt-1
Transmitting antenna is distributed corresponding M (i.e. 8) a receiving antenna and carries out difference；The Nt transmitting antenna is to last M/2 (i.e. 4) a reception
Antenna carries out difference, obtains the equivalent unit distribution of 0.5 λ at equal intervals, finally obtains and meet nyquist sampling Law requirement
Equivalent member distribution；It is controlled by electric switch, successively switches transmitting antenna and complete a data acquisition.Then in ary Quadrature direction
Synthetic aperture scanning is carried out, the scanning to two-dimentional aperture is completed.Finally, complete in conjunction with the synthetic aperture changed based on fast Fourier
Algorithm is ceased, may be implemented quickly to rebuild, completes imaging test.
Fig. 6 shows another embodiment of the present disclosure, in contrast to the embodiment of FIG. 4, the spacing of each transmitting antenna is 3
λ, the spacing between each receiving antenna is λ, wherein in Fig. 6 A, first transmitting antenna and the alignment of first receiving antenna, and in Fig. 6 B,
First transmitting antenna and first receiving antenna are staggered a λ.
Fig. 7 shows another embodiment of the present disclosure, in contrast to the embodiment of FIG. 4, the spacing of each transmitting antenna is 2
λ, the spacing between each receiving antenna is λ, wherein in Fig. 7 A, first transmitting antenna and the alignment of first receiving antenna, and in Fig. 7 B,
First transmitting antenna and first receiving antenna are staggered a λ.
Fig. 8 shows another embodiment of the present disclosure, in contrast to the embodiment of FIG. 4, the spacing of each transmitting antenna is 5
λ, the spacing between each receiving antenna is λ, wherein in Fig. 8 A, first transmitting antenna and the alignment of first receiving antenna, and in Fig. 8 B,
First transmitting antenna and first receiving antenna are staggered a λ.When work, first transmitting antenna to preceding answer 5 receiving antennas into
Row difference；Second to Nt-1 corresponding 10 receiving antennas of transmitting antenna distribution carry out difference；The Nt transmitting antenna is to most
5 receiving antennas carry out difference afterwards, obtain the equivalent unit distribution of 0.5 λ at equal intervals, finally obtain that meet nyquist sampling fixed
The equivalent member distribution that rule requires；It is controlled by electric switch, successively switches transmitting antenna and complete a data acquisition.Then in array
Orthogonal direction carries out synthetic aperture scanning, completes the scanning to two-dimentional aperture.Finally, in conjunction with the conjunction changed based on fast Fourier
It at aperture Holographic Algorithm, may be implemented quickly to rebuild, complete imaging test.For example, 51 transmitting antennas and 250 can be set
Receiving antenna forms the array of 1m.
According to another embodiment of the present disclosure, unlike above embodiments, one kind being used for active millimeter wave safety check
Imaging sparse multiple-input multiple-output array arrangement include for launch wavelength be millimeter wave multirow transmitting antenna arranged in parallel and
For receiving the multirow receiving antenna arranged in parallel that the wavelength reflected by human body is millimeter wave, thus, transmitting antenna can be sent out
Stronger signal is penetrated, receiving antenna can obtain stronger signal, and scanning accuracy is enhanced.Every a line transmitting antenna includes multiple
Transmitting antenna, every a line receiving antenna include multiple receiving antennas.In this way, multirow transmitting antenna successively emits millimeter magnitude radiation
Wave completes single pass, substantially increases scan efficiency, and the human body area of single pass covering increases, and improves scanning speed.?
In the present embodiment, the electromagnetic wave signal of transmitting antenna transmitting can be encoded, so that the predetermined receiving antenna for receiving its signal
The signal received can be identified and decode to generate image.
In the present embodiment, the multirow transmitting antenna is parallel to the multirow receiving antenna；The multirow transmitting antenna
It is separated from each other with the multirow receiving antenna.A line transmitting antenna of multirow transmitting antenna and a line in multirow receiving antenna
Receiving antenna constitutes above-mentioned sparse multiple-input multiple-output array arrangement.
In one embodiment of the present disclosure, a kind of human body safety check equipment is also provided, including one or more above-mentioned dilute
Dredge multiple-input multiple-output array arrangement.
In one embodiment, as shown in figure 9, human body safety check equipment includes the first sparse multiple-input multiple-output array arrangement 100
200 are arranged with the second sparse multiple-input multiple-output array, wherein the first sparse multiple-input multiple-output array arrangement and the second sparse multiple-input multiple-output
Array arrangement is relatively arranged to limit the inspection space S for implementing human body safety check therebetween.First sparse multiple-input multiple-output
Array arrangement 100 and the second sparse multiple-input multiple-output array arrangement are configured to be translated along the vertical direction with reality in perpendicular
Apply scanning.
For example, as shown in figure 9, the first sparse multiple-input multiple-output array arrangement 100 its institute in perpendicular from top to bottom,
Second sparse multiple-input multiple-output array arrangement 200 scans in perpendicular at it from bottom to top respectively.
In one embodiment, as shown in Figure 10, human body safety check equipment includes the first frame 101, and first is sparse multiple more
Array arrangement 100 is received on the first frame 101, so as to move up and down on the first frame 101；Human body safety check equipment packet
The second frame 201 is included, the second sparse multiple-input multiple-output array arrangement 200 is on the second frame 201, so as in the second frame
It is moved up and down on 201.Specifically, the first track-type facilities 104, the first sparse multiple-input multiple-output battle array can be set on the first frame 101
Column arrangement 100 is connected to first track-type facilities 104 in a manner of it can slide so as to fill along first guide rail
It is mobile to carry out the first scanning to object to be measured (human body) to set 104；The second track-type facilities can be set on second frame 201
204, the second sparse multiple-input multiple-output array arrangement 200 is connected to second track-type facilities 204 in a manner of it can slide
So as to move along second track-type facilities 204 to carry out the second scanning to the object (human body) to be measured.Described
One track-type facilities 104 and second track-type facilities 204 can be parallel to each other.
Human body safety check equipment may include driving device 400, for driving the described first sparse multiple-input multiple-output array arrangement
100 move and/or drive the described second sparse multiple-input multiple-output array arrangement 200 along institute along first track-type facilities 104
It is mobile to state the second track-type facilities 204.Human body safety check equipment can also include restraint device, and the restraint device is described for constraining
The movement relation of first sparse multiple-input multiple-output array arrangement 100 and the second sparse multiple-input multiple-output array arrangement 200 is so that institute
It states the first sparse multiple-input multiple-output array arrangement 100 and the second sparse multiple-input multiple-output array arrangement 200 can only be along opposite side
To movement.In one embodiment, the restraint device is to the described first sparse multiple-input multiple-output array arrangement 100 and described second
The positional relationship of sparse multiple-input multiple-output array arrangement 200 is constrained so that the first sparse multiple-input multiple-output array arrangement 100
It can only be moved at an equal rate with the described second sparse multiple-input multiple-output array arrangement 200.Specifically, the restraint device is
Connect the rigidity of the described first sparse multiple-input multiple-output array arrangement 100 and the second sparse multiple-input multiple-output array arrangement 200
Connecting line band 300.First track-type facilities 104 are equipped with the first fixed pulley 103, and second track-type facilities 204 are equipped with second
Fixed pulley 203, the connecting line band successively pass through the first fixed pulley 103 from the described first sparse multiple-input multiple-output array arrangement 100
The described second sparse multiple-input multiple-output array arrangement 200 is connected to the second fixed pulley 203.
In another embodiment, as shown in figure 11, human body safety check equipment includes the first frame 101, and first is sparse multiple more
Array arrangement 100 is received on the first frame 101, so as to move up and down on the first frame 101.Human body safety check equipment packet
The second frame 201 is included, the second sparse multiple-input multiple-output array arrangement 200 is on the second frame 201, so as in the second frame
It is moved up and down on 201.The first track-type facilities 104, the first sparse multiple-input multiple-output array arrangement can be set on first frame 101
100 are connected to first track-type facilities 104 in a manner of it can slide so as to move along first track-type facilities 104
It is dynamic to be scanned with carrying out first to object to be measured (human body)；It can be set the second track-type facilities 204 on second frame 201, described
Two sparse multiple-input multiple-output arrays arrangements 200 are connected to second track-type facilities 204 in a manner of it can slide so as to edge
Second track-type facilities 204 it is mobile to carry out the second scanning to the object (human body) to be measured.Driving device includes direct
Drive the first driving device 401 of the described first sparse multiple-input multiple-output array arrangement 100, the first sparse multiple-input multiple-output array
Arrangement 100 is connected to the first track-type facilities 104 by first driving device.The driving device includes directly driving described second
Second driving device 402 of sparse multiple-input multiple-output array arrangement 200, the second sparse multiple-input multiple-output array arrangement 200 pass through
Second driving device is connected to the second track-type facilities 204.By this arrangement, the first sparse multiple-input multiple-output array arranges 100 Hes
Second sparse multiple-input multiple-output array arrangement 200 can be independently controlled, such as the moving direction of the two can identical or on the contrary, shifting
Dynamic speed can be identical or different.In the present embodiment, it is not provided with the connection of such as first pulley and second pulley and rigidity
The restraint device of tape 300.
In the first sparse multiple-input multiple-output array arrangement 100 and the second sparse multiple-input multiple-output array arrangement 200 together to be measured
During the entire process of object is scanned, the first sparse multiple-input multiple-output array arrangement 100 and described second sparse multiple more
It receives different at the time of 200 transmitting millimeter wave of array arrangement.For example, when scanning is commenced, by control switch, first is sparse multiple
The transmitting antennas for receiving array arrangement 100 successively emit millimeter-wave signal more, the second sparse multiple-input multiple-output array arrangement 200
Transmitting antenna successively emits millimeter-wave signal.For example, when scanning is commenced, by control switch, the first sparse multiple-input multiple-output battle array
Column arrangement 100 by lowest frequency to most high-frequency emission millimeter wave, the second sparse multiple-input multiple-output array arrange 200 by most high frequency to minimum
It takes place frequently and penetrates millimeter wave；Alternatively, the second sparse multiple-input multiple-output array arrangement 200 is sparse multiple more by lowest frequency to most high frequency, first
Array arrangement 100 is received by most high frequency to lowest frequency.In the present embodiment, the first sparse multiple-input multiple-output array arrangement 100 and second
Sparse multiple-input multiple-output array arrangement 200 can be scanned individually, and the scanning signal of the two is used to form the image of human body.
Human body safety check equipment according to an embodiment of the present disclosure further includes processor or controller, for controlling driving device
To implement scan operation, it is also used to handle the millimeter-wave signal that receives with by the first sparse multiple-input multiple-output array arrangement 100 and the
The image on the millimeter wave echo signal processing adult body surface of two sparse multiple-input multiple-output array arrangements 200, can be also used for receiving
Externally input instruction etc..
When carrying out safety check to human body such as passenger etc. using the human body safety check equipment of the disclosure, it is only necessary to which human body rests on people
In body rays safety detection apparatus, i.e., between the first sparse multiple-input multiple-output array arrangement 100 and the second sparse multiple-input multiple-output array arrangement 200,
First sparse multiple-input multiple-output array arrangement 100 and the second sparse scanning simultaneously of multiple-input multiple-output array arrangement 200 scan people respectively
Then the side of body will scan resulting signal and be sent to processor or controller, carry out image by processor or controller
Processing forms the image of human body, and completion conveniently checks.
In one embodiment of the present disclosure, it also provides a kind of using if above-mentioned sparse multiple-input multiple-output array arrangement is to people
The method of body examinations.
Although some embodiments of this totality inventional idea have been shown and have illustrated, those of ordinary skill in the art will be managed
Solution can make a change these embodiments in the case where the principle and spirit without departing substantially from this totality inventional idea, the disclosure
Range is limited with claim and their equivalent.
Claims (20)
1. a kind of sparse multiple-input multiple-output array arrangement for active millimeter wave safety check imaging, including for launch wavelength in the least
One group of transmitting antenna of metric wave and for receive by one group of transmitting antenna transmitting by human body reflect wavelength be millimeter wave
One group of receiving antenna；
Wherein, one group of transmitting antenna includes multiple transmitting antennas along the first row arrangement, and one group of receiving antenna includes
Along multiple receiving antennas of the second row arrangement, multiple transmitting antennas of the first row of one group of transmitting antenna are parallel to described one
Multiple receiving antennas arrangement of second row of group receiving antenna, and one group described in one group of transmitting antenna and the second row described in the first row
Receiving antenna is spaced apart, and is generally aligned in the same plane；
Wherein, the second row corresponding with the gap length between two adjacent transmitting antennas that the first row arranges is mutually isometric
The quantity that at least one receiving antenna makes the quantity of transmitting antenna be less than receiving antenna is arranged in degree range.
2. sparse multiple-input multiple-output array arrangement according to claim 1, wherein at least one transmitting antenna and at least one
Receiving antenna is aligned so that line between the two is perpendicular to the row of one group of transmitting antenna or one group of receiving antenna
Direction；Or
The line and one group of transmitting antenna or one group of reception of any one transmitting antenna and any one receiving antenna
The direction out of plumb of the row of antenna.
3. sparse multiple-input multiple-output array arrangement according to claim 1, wherein the multiple transmitting antenna is with radiated wave
The distance interval of the integral multiple of wavelength is opened, and the multiple receiving antenna is opened with the distance interval of the wavelength of one times of radiated wave.
4. sparse multiple-input multiple-output array arrangement according to claim 4, plurality of transmitting antenna with 2 times, 3 times, 4 times or
The distance interval of the wavelength of 5 times of radiated wave is opened.
5. sparse multiple-input multiple-output array arrangement according to claim 1, wherein one of one group of transmitting antenna emits
The midpoint of one line is counted as this in hithermost corresponding multiple receiving antennas of antenna and one group of receiving antenna
The virtual displaced phase center of a pair of of transmitting antenna-receiving antenna, the distance between adjacent displaced phase center are radiation
0.3 to 0.7 times of the wavelength of wave.
6. sparse multiple-input multiple-output array arrangement according to claim 5, wherein between adjacent displaced phase center away from
Half from the wavelength for radiated wave.
7. sparse multiple-input multiple-output array arrangement according to claim 1, wherein one group of transmitting antenna described in the first row and the
The distance spaced apart of one group of receiving antenna described in two rows is less than the 10% of image-forming range.
8. sparse multiple-input multiple-output array according to claim 1 is arranged, wherein the head of one group of transmitting antenna described in the first row
The first receiving antenna of one group of receiving antenna described in a transmitting antenna and the second row, which misplaces, to be arranged.
9. sparse multiple-input multiple-output array arrangement according to claim 1, further includes control switch, for controlling described one group
Transmitting antenna successively emits millimeter wave.
10. sparse multiple-input multiple-output array arrangement according to claim 5, be configured to: one group of transmitting antenna being capable of edge
Multiple transmitting antennas of the first row arrangement successively emit the one-dimensional scanning that radiated wave completes one group of transmitting antenna one by one, and can
Human body two-dimensional scanning is completed along with the displacement of the orthogonal direction in the direction of the row of one group of transmitting antenna, and can be based in Fu
The synthetic aperture Holographic Algorithm of leaf transformation completes imaging.
11. sparse multiple-input multiple-output array arrangement according to claim 10, is configured to the synthesis hole based on Fourier transformation
Diameter Holographic Algorithm once completes image reconstruction, imaging formula to correct imaging region are as follows:
Wherein, σ (x, y) is the scattering coefficient of human body, R0It is image-forming range, FT2DFor two-dimensional Fourier transform,For two-dimentional Fu
In leaf inverse transformation, j is imaginary unit, and k is propagation constant, kx、kyIt is space propagation constant respectively；
The echo-signal of human body is received for a pair of of transmitting antenna-receiving antenna combination；KωFor the space frequency of stepped frequency radar
Rate；For a point target in target area, I indicates to be located at I (xn, yn) at scattering point target, define I and transmitting day
Line AtDistance be RT, n, I and receiving antenna ArBetween distance be RR, n。
12. a kind of sparse multiple-input multiple-output array arrangement for active millimeter wave safety check imaging, including be for launch wavelength
The multirow transmitting antenna arranged in parallel of millimeter wave and for receive by human body reflect wavelength be millimeter wave it is arranged in parallel
Multirow receiving antenna, every a line transmitting antenna include multiple transmitting antennas, and every a line receiving antenna includes multiple receiving antennas；
The multirow transmitting antenna is parallel to the multirow receiving antenna；The multirow transmitting antenna and the multirow receiving antenna
It is separated from each other；
Wherein, a line transmitting antenna in multirow transmitting antenna and a line receiving antenna in multirow receiving antenna constitute such as right
It is required that sparse multiple-input multiple-output array arrangement described in 1.
13. a kind of human body safety check equipment, including one or more sparse more as described in any one of claim 1-11 or 12
Hair receives array arrangement.
14. human body safety check equipment as claimed in claim 13, wherein any one of one or more claim 1-11 or 12
The sparse multiple-input multiple-output array arrangement includes the first sparse multiple-input multiple-output array arrangement and the second sparse multiple-input multiple-output array cloth
It sets, wherein the first sparse multiple-input multiple-output array arrangement and the second sparse multiple-input multiple-output array arrangement are relatively arranged so as in the two
Between limit the inspection space for implementing human body safety check, and the first sparse multiple-input multiple-output array arrangement and the second sparse multiple-input multiple-output
Array arrangement is configured to be translated along the vertical direction in perpendicular to implement to scan.
15. human body safety check equipment as claimed in claim 14, wherein human body safety check equipment further include:
First frame, the first sparse multiple-input multiple-output array are arranged on the first frame and can move up and down on the first frame；With,
Second frame, the second sparse multiple-input multiple-output array are arranged on the second frame and can move up and down on the second frame；
Wherein, the first track-type facilities are set on the first frame, and the first sparse multiple-input multiple-output array arrangement is in a manner of it can slide
First track-type facilities are connected to so as to move along first track-type facilities to carry out the first scanning to human body；The
Second track-type facilities are set on two frames, and the second sparse multiple-input multiple-output array arrangement is connected to institute in a manner of it can slide
The second track-type facilities are stated so as to move along second track-type facilities to carry out the second scanning to human body.
16. human body safety check equipment as claimed in claim 15, wherein human body safety check equipment further include:
Driving device, for drive the described first sparse multiple-input multiple-output array arrangement to move along first track-type facilities and/
Or the sparse multiple-input multiple-output array arrangement of driving described second is moved along second track-type facilities；With
Restraint device, the restraint device for constraining, arrange and described second is sparse more by the described first sparse multiple-input multiple-output array
The hair movement relations for receiving array arrangement so that the first sparse multiple-input multiple-output array is arranged and described second is sparse multiple more more
Receiving array arrangement can only move in opposite direction.
17. human body safety check equipment as claimed in claim 16, wherein the restraint device is that connection described first is sparse multiple
The connecting line band of the rigidity for receiving array arrangement and the described second sparse multiple-input multiple-output array arrangement more；
Wherein, first track-type facilities are equipped with the first fixed pulley, and second track-type facilities are equipped with the second fixed pulley, the company
Wiring band is successively connected to by the first fixed pulley and the second fixed pulley described from the described first sparse multiple-input multiple-output array arrangement
Second sparse multiple-input multiple-output array arrangement.
18. human body safety check equipment as claimed in claim 15, wherein human body safety check equipment includes: first driving device, directly
The described first sparse multiple-input multiple-output array arrangement is driven, the first sparse multiple-input multiple-output array is arranged through first driving device
It is connected to the first track-type facilities；With, the second driving device, the described second sparse multiple-input multiple-output array arrangement is directly driven, it is described
Second sparse multiple-input multiple-output array is arranged through the second driving device and is connected to the second track-type facilities.
19. human body safety check equipment as claimed in claim 14, wherein the first sparse multiple-input multiple-output array arrangement by lowest frequency to
Most high-frequency emission millimeter wave, the second sparse multiple-input multiple-output array are arranged by most high frequency to lowest frequency millimeter wave, alternatively, second is sparse
Multiple-input multiple-output array arrangement by lowest frequency to most high-frequency emission millimeter wave, the first sparse multiple-input multiple-output array arrange by most high frequency to
Lowest frequency millimeter wave.
20. a kind of human body safety check method implemented using human body safety check equipment described in any one of claim 13-19.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811653893.4A CN109782366A (en) | 2018-12-29 | 2018-12-29 | Multiple-input multiple-output aerial array arrangement, human body safety check device and method for active millimeter wave safety check imaging |
| EP19817109.2A EP3647826A4 (en) | 2018-08-17 | 2019-08-15 | Multiple-transmitting multiple-receiving antenna array arrangement for active millimeter wave security inspection imaging, and human body security inspection device and method |
| JP2020571671A JP7181319B2 (en) | 2018-08-17 | 2019-08-15 | Multiple transmit/receive antenna array arrangement used for active millimeter wave security inspection imaging, human body security inspection apparatus and method |
| BR112020027061-0A BR112020027061A2 (en) | 2018-08-17 | 2019-08-15 | MULTIPLE TRANSMISSION AND MULTIPLE RECEPTIONS ANTENNA MATRIX ARRANGEMENT, AND SAFETY INSPECTION APPLIANCE IN THE HUMAN BODY |
| PCT/CN2019/100787 WO2020035023A1 (en) | 2018-08-17 | 2019-08-15 | Multiple-transmitting multiple-receiving antenna array arrangement for active millimeter wave security inspection imaging, and human body security inspection device and method |
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| CN201811653893.4A CN109782366A (en) | 2018-12-29 | 2018-12-29 | Multiple-input multiple-output aerial array arrangement, human body safety check device and method for active millimeter wave safety check imaging |
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| CN109782366A true CN109782366A (en) | 2019-05-21 |
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