CN109471193B - Signal processing imaging method of microwave millimeter wave three-dimensional holographic imaging system - Google Patents
Signal processing imaging method of microwave millimeter wave three-dimensional holographic imaging system Download PDFInfo
- Publication number
- CN109471193B CN109471193B CN201811377133.5A CN201811377133A CN109471193B CN 109471193 B CN109471193 B CN 109471193B CN 201811377133 A CN201811377133 A CN 201811377133A CN 109471193 B CN109471193 B CN 109471193B
- Authority
- CN
- China
- Prior art keywords
- dimension
- signal
- millimeter wave
- scanning
- microwave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000003384 imaging method Methods 0.000 title claims abstract description 69
- 238000012545 processing Methods 0.000 title claims description 8
- 238000004422 calculation algorithm Methods 0.000 claims abstract description 36
- 238000004364 calculation method Methods 0.000 claims abstract description 13
- 238000003672 processing method Methods 0.000 claims abstract description 9
- 230000005012 migration Effects 0.000 claims abstract description 8
- 238000013508 migration Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000010363 phase shift Effects 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 claims description 16
- 238000009825 accumulation Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 230000001427 coherent effect Effects 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 5
- 238000007689 inspection Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000009795 derivation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/005—Prospecting or detecting by optical means operating with millimetre waves, e.g. measuring the black losey radiation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/887—Radar or analogous systems specially adapted for specific applications for detection of concealed objects, e.g. contraband or weapons
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a signal processing and imaging method of a microwave millimeter wave three-dimensional holographic imaging system, wherein an echo signal is obtained in the scanning process of a microwave millimeter wave antenna array, and the (y, k) dimension is subjected to image focusing by adopting a phase shift migration algorithm; carrying out image focusing on the x dimension by adopting a back projection reconstruction method; and finally obtaining the three-dimensional complex image of the imaging target. The invention integrates the characteristics of a time domain imaging algorithm and a frequency domain imaging algorithm, adopts a phase shift migration algorithm to perform decoupling and imaging focusing in a vertical array dimension and a distance dimension, adopts a back projection reconstruction algorithm to perform imaging focusing in a plane or cylindrical surface motion scanning dimension, utilizes the advantages that the back projection reconstruction algorithm is suitable for any antenna scanning track and is convenient for motion compensation, is suitable for a microwave millimeter wave plane scanning imaging system and a microwave millimeter wave cylindrical surface scanning imaging system, can achieve the aim of performing algorithm development once, is suitable for two imaging systems, can clearly image and has higher calculation efficiency.
Description
Technical Field
The invention relates to a microwave millimeter wave three-dimensional holographic imaging technology, in particular to a signal processing imaging method of a microwave millimeter wave three-dimensional holographic imaging system.
Background
The microwave millimeter wave three-dimensional holographic imaging security inspection system is a mainstream direction of active microwave millimeter wave human body security inspection, mainly comprises a plane scanning type imaging system and a cylindrical surface scanning type imaging system at present, obtains human body microwave millimeter wave backscattering signals through a microwave millimeter wave receiving and sending front end, can effectively detect contraband and dangerous goods hidden under human body clothes through imaging without contacting a human body, has electromagnetic radiation dose of only one thousandth of radiation of a mobile phone, and is an effective new human body security inspection mode; the system can be widely applied to security inspection occasions such as civil aviation airports, prisons, courtrooms, border checkpoints, customs ports, major activities and the like, and can effectively deter terrorism.
The existing microwave millimeter wave three-dimensional holographic imaging signal processing method mainly comprises a time domain imaging algorithm and a frequency domain imaging algorithm; the time domain imaging algorithm comprises a time domain correlation algorithm and a back projection reconstruction algorithm, is suitable for any antenna scanning track, can be used for microwave millimeter wave plane scanning and cylindrical surface scanning imaging systems, has the advantages of convenient realization of motion compensation, is a classic signal processing imaging algorithm, but is only used as an algorithm for comparing imaging effects because of large calculated amount and more hardware consumption resources and difficult achievement of the real-time requirement of calculation; the frequency domain imaging algorithm comprises a distance migration algorithm and a phase migration algorithm, the algorithm principle derivation of the microwave millimeter wave plane scanning and cylindrical surface scanning imaging system is inconsistent, and if the frequency domain imaging algorithm is applied to an actual system, signal processing imaging software and hardware of the plane scanning and cylindrical surface scanning imaging system need to be developed respectively, so that the hardware cost and the labor cost are increased, and the development period is prolonged.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to realize three-dimensional imaging by combining plane scanning and cylindrical scanning provides a signal processing imaging method of a microwave millimeter wave three-dimensional holographic imaging system.
The invention solves the technical problems through the following technical scheme, and the invention comprises the following steps:
(1) obtaining an echo signal s (x, y, k) in a microwave millimeter wave antenna array scanning process, wherein the echo signal s (x, y, k) is a complex signal and comprises amplitude and phase information; x is the transverse scanning dimension of the microwave millimeter wave antenna array, y is the longitudinal scanning dimension of the microwave millimeter wave antenna array, and k is the frequency scanning dimension of the microwave millimeter wave transceiving front end;
(2) performing y-dimension Fourier transform on the echo signal s (x, y, k) to obtain a vertical-dimension wave number domain signal s (x,ky,k)；
(3) decoupling focusing is carried out on the vertical dimension wave number domain signal by a y-dimension and k-dimension phase shift migration algorithm, namely a focusing plane z is divided in a distance dimensioni,i＝1,2...N；
(4) Calculating to obtain a focal plane ziMatched filtered signal Href (k)y,k,zi) Filtered signal Href (k)y,k,zi) And a vertical dimension wave number domain signal s (x, k)yK) of k)yMultiplying k dimensions to perform matched filtering calculation to obtain a signal s (x, k)y,k,zi)；
(5) For signal s (x, k)y,k,zi) K of (a)yObtaining millimeter wave vertical scanning dimension focusing signal s (x, y', k, z) by dimension inverse Fourier transformi)；
(6) Focusing a signal s (x, y', k, z) in the millimeter wave vertical scan dimensioni) Performing integral accumulation average operation on the frequency scanning dimension k to finally obtain a plane ziSo as to cyclically repeat all the focal planes ziN, y is decoupled from the k-dimensional signal and focused;
(7) then carrying out focusing calculation of x dimension, adopting a back projection reconstruction algorithm, and carrying out y-dimension sampling on each sampling positioniDividing xoz grids, and solving the sampling position (x) of the x-dimension antenna for each pixel point (x ', z') on the gridsi,zi) Slant distance R to grid point position (x', zi；
(8) Interpolating distance dimension of focused image signal s (x, y ', z ') to obtain distance matching sampling point s (x, y ', z)i')；
(9) Distance matching sample point signal s (x, y', z)i') matched with the range dimension, filtered signal Hrefrange_iMultiplying to obtain a distance dimension compressed signal sHref(x,y',zi')；
(10) Compressing the signal s in all x dimensions in the distance dimensionHref(x,y',zi') coherent accumulation calculation to obtain the result of one pixel point; after traversing all pixel points of the grid, obtaining yiFocal profile xoz of location, repeat aboveCalculating to finally obtain a focused target three-dimensional complex image;
(11) and obtaining an amplitude image from the three-dimensional complex image, and then performing distance dimension maximum value projection to obtain a two-dimensional image for display.
In the step (1), x is a transverse scanning dimension of the microwave millimeter wave antenna array, and is plane scanning or cylindrical scanning.
In the step (1), the signal system is a frequency stepping continuous wave signal or a frequency modulation continuous wave signal.
In the step (3), the focal plane z is divided in the distance dimensioni,i＝1,2...N，Δz＝zi-zi-1The criterion for setting the Δ z parameter for the step interval of the focal plane is
c is the speed of light in free space, B ═ fmax-fminIs the bandwidth of microwave millimeter wave radio frequency signal, fminIs the minimum value of the frequency of the radio frequency signal, fmaxIs the maximum value of the frequency of the radio frequency signal.
In the step (4), the filtering signal is:
in the step (7), the grid criterion is divided xoz into x-dimension grid size
z dimension grid size
Wherein
c is the speed of light in free space, fcIs the center frequency, lambda, of microwave millimeter wave radio frequency signalscIs the central wavelength of the microwave millimeter wave radio frequency signal.
In the step (7), the sampling position (x) of the x-dimension antenna is solved for each pixel point (x ', z') on the gridi,zi) Slant to grid point position (x', z
Wherein if the millimeter wave planar scanning imaging system (x)i,zi)＝(xi,0)，xiScanning the dimensional rectangular coordinates for planar motion, if cylindrical scanning imaging system (x)i,zi) Where R is the radius of the scanning cylinder and θ is the angle of the motion scan.
In the step (9), the distance matching sampling point signal s (x, y', z)i') matched with the range dimension, filtered signal Hrefrange_i＝exp(j·2·kc·Ri) Multiplying to obtain a distance dimension compressed signal sHref(x,y',zi') wherein k isc＝2·pi·fc/c,fcIs the center frequency of the millimeter wave radio frequency signal, c is the speed of light in free space, RiAntenna sample position (x) for x dimensioni,zi) The slant to the grid point position (x ', z').
Compared with the prior art, the invention has the following advantages: the invention integrates the characteristics of a time domain imaging algorithm and a frequency domain imaging algorithm, adopts a phase shift migration algorithm to decouple and image and focus in a vertical array dimension and a distance dimension, adopts a back projection reconstruction algorithm to image and focus in a plane or cylindrical surface motion scanning dimension, fully utilizes the advantages that the back projection reconstruction algorithm is suitable for any antenna scanning track and is convenient for motion compensation, is suitable for a microwave millimeter wave plane scanning imaging system and a microwave millimeter wave cylindrical surface scanning imaging system, can achieve the aim of carrying out algorithm development once and being suitable for two imaging systems, can clearly image, greatly reduces the calculation amount compared with the time domain imaging algorithm, does not need repeated development compared with the frequency domain imaging algorithm, effectively reduces the hardware cost and the labor cost, can effectively save the cost and shorten the development period of signal processing software and hardware, and simultaneously, the calculation efficiency is higher.
Drawings
FIG. 1 is a schematic plan scan geometry of a microwave millimeter wave imaging system;
FIG. 2 is a schematic view of a cylindrical surface scanning geometry of a microwave millimeter wave imaging system;
FIG. 3 is a flow chart of a signal processing imaging method of the microwave millimeter wave three-dimensional holographic imaging system of the present invention.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
As shown in fig. 1 and 2, in the present embodiment, in the imaging system of fig. 1 and 2, the antenna array realizes vertical movement of an antenna beam by switching the radio frequency switches of the microwave millimeter wave antenna array 1, which corresponds to the y axis of the coordinate axis; the antenna array drives the antenna array to realize horizontal scanning 2 through a mechanical scanning device, and the horizontal scanning corresponds to an x axis of a coordinate axis; finally, the sampling distribution of the wave beams in the two-dimensional space plane is realized, and the three-dimensional echo signal s (x, y, k) of the space area 3 is obtained, wherein k corresponds to the distance frequency scanning dimension.
As shown in fig. 3, the specific implementation process of this embodiment is as follows:
performing y-dimension Fourier transform on the echo signals s (x, y, k) obtained in the figures 1 and 2 to obtain vertical-dimension wave number domain signals s (x, k)y,k)；
For the vertical dimension wave number domain signal s (x, k)yK) performing decoupling focusing by y-dimension and k-dimension phase shift migration algorithm, specifically describing that a focusing plane z is divided in a distance dimensioni,i＝1,2...N，Δz＝zi-zi-1The criterion for setting the Δ z parameter for the step interval of the focal plane is
c is the speed of light in free space, B ═ fmax-fminIs the bandwidth of microwave millimeter wave radio frequency signal, fminIs the minimum value of the frequency of the radio frequency signal, fmaxIs the maximum value of the frequency of the radio frequency signal;
obtaining a focal plane ziMatched filtered signal of
Signal Href (k)y,k,zi) And signal s (x, k)yK) of k)yMultiplying k dimensions to perform matched filtering calculation to obtain a signal s (x, k)y,k,zi)；
For signal s (x, k)y,k,zi) K of (a)yObtaining millimeter wave vertical dimension focusing signal s (x, y', k, z) by dimension inverse Fourier transformi)；
At said signal s (x, y', k, z)i) Performing integral accumulation average operation on the frequency scanning dimension k to finally obtain a focusing plane ziThe focused image is traversed to obtain all the focusing planes ziN (x, y ', z') such that the signals in the vertical dimension y and the distance dimension z are decoupled and the image is focused, then only the signals in the x dimension need to be focused;
adopting a back projection reconstruction algorithm for the focusing operation of the x dimension, and adopting a back projection reconstruction algorithm at each sampling position y of the y dimensioniDividing xoz grids into x-dimension grids
z dimension grid size
Wherein
c is the speed of light in free space, fcIs the center frequency, lambda, of microwave millimeter wave radio frequency signalscThe central wavelength of the microwave millimeter wave radio frequency signal; finding an x-dimensional antenna sampling position (x) for each pixel point (x ', z') on the gridi,zi) Slant to grid point position (x', z
Wherein if the millimeter wave planar scanning imaging system (x)i,zi)＝(xi,0)，xiScanning a dimension rectangular coordinate for plane motion; if it is a cylindrical scanning imaging system (x)i,zi) (R · con (θ), R · sin (θ)), R being the radius of the scanning cylinder, θ being the angle of the motion scan;
interpolating the distance dimension of the signal s (x, y ', z') to find the corresponding slope distance RiIs matched to the sample point s (x, y', z)i') the interpolation algorithm can select linear interpolation, cell interpolation, 8-point SINC interpolation algorithm, etc.;
sampling point signal s (x, y', z) obtained by interpolationi') matched with the range dimension, filtered signal Hrefrange_i＝exp(j·2·kc·Ri) Multiplying to obtain a distance dimension compressed signal sHref(x,y',zi') wherein k isc＝2·pi·fc/c,fcIs the central frequency of microwave millimeter wave radio frequency signal, c is the speed of light in free space, RiAntenna sample position (x) for x dimensioni,zi) A slope to grid point position (x ', z');
then compressing the signal s in all the x dimensionsHref(x,y',zi') coherent accumulation calculation to obtain the result of one pixel point; after all pixel grids are traversed, y is obtainediFocal profile xoz of position, repeatedly calculating all yiThe focused profile xoz of the location, resulting in a final three-dimensional complex image O (x ', y ', z ') of the object.
The obtained three-dimensional complex image O (x ', y ', z ') can be further processed for display, target detection, target classification and identification and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A signal processing imaging method of a microwave millimeter wave three-dimensional holographic imaging system is characterized by comprising the following steps:
(1) obtaining an echo signal s (x, y, k) in a microwave millimeter wave antenna array scanning process, wherein the echo signal s (x, y, k) is a complex signal and comprises amplitude and phase information; x is the transverse scanning dimension of the microwave millimeter wave antenna array, y is the longitudinal scanning dimension of the microwave millimeter wave antenna array, and k is the frequency scanning dimension of the microwave millimeter wave transceiving front end;
(2) performing y-dimension Fourier transform on the echo signal s (x, y, k) to obtain a vertical-dimension wave number domain signal s (x, k)y,k)；
(3) Decoupling focusing is carried out on the vertical dimension wave number domain signal by a y-dimension and k-dimension phase shift migration algorithm, namely a focusing plane z is divided in a distance dimensioni,i＝1,2...N；
(4) Calculating to obtain a focal plane ziMatched filtered signal Href (k)y,k,zi) Matched filtered signal Href (k)y,k,zi) And a vertical dimension wave number domain signal s (x, k)yK) of k)yMultiplying k dimensions to perform matched filtering calculation to obtain a signal s (x, k)y,k,zi)；
(5) For signal s (x, k)y,k,zi) K of (a)yObtaining millimeter wave vertical scanning dimension focusing signal s (x, y', k, z) by dimension inverse Fourier transformi)；
(6) Focusing a signal s (x, y', k, z) in the millimeter wave vertical scan dimensioni) Performing integral accumulation average operation on the frequency scanning dimension k to finally obtain a plane ziSo as to cyclically repeat all the focal planes ziN, y is decoupled from the k-dimensional signal and focused;
(7) then carrying out focusing calculation of x dimension, adopting a back projection reconstruction algorithm, and carrying out y-dimension sampling on each sampling positioniDividing xoz grids, and solving the sampling position (x) of the x-dimension antenna for each pixel point (x ', z') on the gridsi,zi) Slant distance R to grid point position (x', zi；
(8) Interpolating distance dimension of focused image signal s (x, y ', z ') to obtain distance matching sampling point s (x, y ', z)i')；
(9) Distance matching sample point signal s (x, y', z)i') is matched to the distance dimensionFiltered signal Hrefrange_iMultiplying to obtain a distance dimension compressed signal sHref(x,y',zi')；
(10) Compressing the signal s in all x dimensions in the distance dimensionHref(x,y',zi') coherent accumulation calculation to obtain the result of one pixel point; after traversing all pixel points of the grid, obtaining yiA focal section xoz of position, repeating the above calculation to finally obtain a focused three-dimensional complex image of the target;
(11) and obtaining an amplitude image from the three-dimensional complex image, and then performing distance dimension maximum value projection to obtain a two-dimensional image for display.
2. The signal processing and imaging method for the microwave millimeter wave three-dimensional holographic imaging system according to claim 1, wherein in the step (1), x is a transverse scanning dimension of the microwave millimeter wave antenna array, and is a plane scanning or a cylindrical scanning.
3. The signal processing and imaging method of the microwave and millimeter wave three-dimensional holographic imaging system according to claim 1, wherein in the step (1), the signal system is a frequency stepping continuous wave signal or a frequency modulation continuous wave signal.
4. The signal processing and imaging method for the microwave millimeter wave three-dimensional holographic imaging system according to claim 1, wherein in the step (3), the focusing plane z is divided in the distance dimensioni,i＝1,2...N，Δz＝zi-zi-1The criterion for setting the Δ z parameter for the step interval of the focal plane is
c is the speed of light in free space, B ═ fmax-fminIs the bandwidth of microwave millimeter wave radio frequency signal, fminIs the minimum value of the frequency of the radio frequency signal, fmaxIs the maximum value of the frequency of the radio frequency signal.
5. A method as claimed in claim 1The signal processing and imaging method of the microwave millimeter wave three-dimensional holographic imaging system is characterized in that in the step (4), the matched filtering signal is as follows:
6. the signal processing and imaging method for the microwave and millimeter wave three-dimensional holographic imaging system according to claim 1, wherein in the step (7), the grid criterion of dividing xoz is x-dimension grid size
z dimension grid size
Wherein
c is the speed of light in free space, fcIs the center frequency, lambda, of microwave millimeter wave radio frequency signalscIs the central wavelength of microwave millimeter wave radio frequency signal, B ═ fmax-fminIs the bandwidth of microwave millimeter wave radio frequency signal, fminIs the minimum value of the frequency of the radio frequency signal, fmaxIs the maximum value of the frequency of the radio frequency signal.
7. The signal processing and imaging method for the microwave and millimeter wave three-dimensional holographic imaging system according to claim 6, wherein in the step (7), the sampling position (x) of the x-dimension antenna is obtained for each pixel point (x ', z') on the gridi,zi) Slant to grid point position (x', z
Wherein if the millimeter wave planar scanning imaging system (x)i,zi)＝(xi,0)，xiScanning the dimensional rectangular coordinates for planar motion, if cylindrical scanning imaging system (x)i,zi) Where R is the radius of the scanning cylinder and θ is the angle of the motion scan.
8. The signal processing and imaging method for the microwave millimeter wave three-dimensional holographic imaging system according to claim 1, wherein in the step (9), the distance matching sampling point signal s (x, y', z)i') matched with the range dimension, filtered signal Hrefrange_i＝exp(j·2·kc·Ri) Multiplying to obtain a distance dimension compressed signal sHref(x,y',zi') wherein k isc＝2·pi·fc/c,fcIs the center frequency of the millimeter wave radio frequency signal, c is the speed of light in free space, RiAntenna sample position (x) for x dimensioni,zi) The slant to the grid point position (x ', z').
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811377133.5A CN109471193B (en) | 2018-11-19 | 2018-11-19 | Signal processing imaging method of microwave millimeter wave three-dimensional holographic imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811377133.5A CN109471193B (en) | 2018-11-19 | 2018-11-19 | Signal processing imaging method of microwave millimeter wave three-dimensional holographic imaging system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109471193A CN109471193A (en) | 2019-03-15 |
| CN109471193B true CN109471193B (en) | 2020-05-15 |
Family
ID=65673007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811377133.5A Active CN109471193B (en) | 2018-11-19 | 2018-11-19 | Signal processing imaging method of microwave millimeter wave three-dimensional holographic imaging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109471193B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110794471B (en) * | 2019-09-30 | 2021-04-16 | 博微太赫兹信息科技有限公司 | Millimeter wave sparse array remote monitoring imaging method and system |
| CN110764088B (en) * | 2019-10-25 | 2023-10-27 | 哈尔滨工程大学 | Super-resolution standing point scanning real-time imaging algorithm |
| CN111896951B (en) * | 2020-08-11 | 2022-12-09 | 中国人民解放军国防科技大学 | Three-dimensional imaging and reconstructing method of millimeter wave cylindrical holographic imaging system |
| CN112162327B (en) * | 2020-08-18 | 2021-12-28 | 欧必翼太赫兹科技(北京)有限公司 | Holographic imaging security inspection equipment |
| CN112114310B (en) * | 2020-08-27 | 2022-08-02 | 博微太赫兹信息科技有限公司 | Microwave millimeter wave holographic image reconstruction method based on three-dimensional decomposition |
| CN112099102B (en) * | 2020-08-27 | 2023-07-11 | 博微太赫兹信息科技有限公司 | Antenna array mechanical scanning type holographic image reconstruction method |
| CN112098997B (en) * | 2020-09-18 | 2021-10-15 | 欧必翼太赫兹科技(北京)有限公司 | Three-dimensional holographic imaging security inspection radar image foreign matter detection method |
| CN112558065B (en) * | 2020-09-30 | 2022-04-08 | 北京理工大学 | Three-dimensional imaging method based on reconfigurable electromagnetic surface array |
| CN112634244B (en) * | 2020-12-28 | 2022-09-30 | 博微太赫兹信息科技有限公司 | Three-dimensional complex image processing method and system for target detection |
| CN112782692B (en) * | 2020-12-29 | 2022-08-23 | 北京理工大学 | Imaging system and imaging method based on arc MIMO linear array scanning |
| CN113156432B (en) * | 2021-05-07 | 2023-08-15 | 南京邮电大学 | Portable microwave imaging system |
| CN113848547B (en) * | 2021-09-24 | 2022-09-16 | 苏州威陌电子信息科技有限公司 | Digital holographic fast imaging method |
| CN113933834B (en) * | 2021-10-13 | 2022-07-29 | 苏州威陌电子信息科技有限公司 | Cylindrical scanning microwave imaging method |
| CN116520321B (en) * | 2022-12-05 | 2024-07-19 | 重庆邮电大学 | MIMO array arrangement with half-wavelength uniform scanning and synthetic aperture imaging method thereof |
| CN116577782B (en) * | 2023-04-23 | 2024-01-12 | 珠海微度芯创科技有限责任公司 | Millimeter wave one-dimensional linear array rapid image reconstruction method and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102054267A (en) * | 2010-12-08 | 2011-05-11 | 电子科技大学 | Enhancement method aiming at passive millimeter wave image |
| CN102540183A (en) * | 2010-12-14 | 2012-07-04 | 中国科学院电子学研究所 | Three-dimensional microwave imaging method based on cylinder geometry |
| WO2015021790A1 (en) * | 2013-08-15 | 2015-02-19 | 同方威视技术股份有限公司 | Millimeter-wave three-dimensional holographic scanning imaging apparatus and checking method |
| CN106338732A (en) * | 2016-08-23 | 2017-01-18 | 华讯方舟科技有限公司 | Millimeter wave 3D holographic imaging method and millimeter wave 3D holographic imaging system |
| CN106896359A (en) * | 2015-12-17 | 2017-06-27 | 上海铭剑电子科技有限公司 | Active millimeter wave 3D hologram imaging system and safe examination system |
-
2018
- 2018-11-19 CN CN201811377133.5A patent/CN109471193B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102054267A (en) * | 2010-12-08 | 2011-05-11 | 电子科技大学 | Enhancement method aiming at passive millimeter wave image |
| CN102540183A (en) * | 2010-12-14 | 2012-07-04 | 中国科学院电子学研究所 | Three-dimensional microwave imaging method based on cylinder geometry |
| WO2015021790A1 (en) * | 2013-08-15 | 2015-02-19 | 同方威视技术股份有限公司 | Millimeter-wave three-dimensional holographic scanning imaging apparatus and checking method |
| CN106896359A (en) * | 2015-12-17 | 2017-06-27 | 上海铭剑电子科技有限公司 | Active millimeter wave 3D hologram imaging system and safe examination system |
| CN106338732A (en) * | 2016-08-23 | 2017-01-18 | 华讯方舟科技有限公司 | Millimeter wave 3D holographic imaging method and millimeter wave 3D holographic imaging system |
Non-Patent Citations (1)
| Title |
|---|
| 面向人体安检的毫米波转台成像实验;郑岱阳 等;《太赫兹科学与电子信息学报》;20180228;第16卷(第1期);第90-95页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109471193A (en) | 2019-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109471193B (en) | Signal processing imaging method of microwave millimeter wave three-dimensional holographic imaging system | |
| Moll et al. | Towards three-dimensional millimeter-wave radar with the bistatic fast-factorized back-projection algorithm—Potential and limitations | |
| CN105044719B (en) | A kind of high-precision vertical curved surface imaging method of the Terahertz based on circumference SAR | |
| CN113820711B (en) | Array rapid imaging method and application thereof | |
| CN112114310B (en) | Microwave millimeter wave holographic image reconstruction method based on three-dimensional decomposition | |
| Wei et al. | Sparse array microwave 3-D imaging: Compressed sensing recovery and experimental study | |
| US11385380B2 (en) | System and method for debugging millimeter wave security inspection instrument | |
| CN110794471B (en) | Millimeter wave sparse array remote monitoring imaging method and system | |
| WO2018196245A1 (en) | Close-range microwave imaging method and system | |
| CN109884627A (en) | The short range millimeter wave rapid three dimensional imaging process of any linear array configuration | |
| Hu et al. | Advanced thz mimo sparse imaging scheme using multipass synthetic aperture focusing and low-rank matrix completion techniques | |
| Wang et al. | Azimuth improved radar imaging with virtual array in the forward-looking sight | |
| Sheen et al. | High-resolution 3D microwave imaging of a moving target using optical motion capture | |
| Wang et al. | Efficient wavenumber domain processing for near-field imaging with polyline arrays | |
| CN112099102B (en) | Antenna array mechanical scanning type holographic image reconstruction method | |
| CN111090102B (en) | Super-resolution reflection type terahertz three-dimensional target reconstruction imaging method | |
| Zhu et al. | Microwave imaging of non-rigid moving target using 2D sparse MIMO array | |
| Thammakhoune et al. | Moving target imaging for synthetic aperture radar via RPCA | |
| Kidera et al. | Efficient three-dimensional imaging method based on enhanced range point migration for UWB radars | |
| Wang et al. | Efficient single-frequency millimeter-wave three-dimensional imaging for rapid target identification | |
| Omori et al. | K-space decomposition based super-resolution three-dimensional imaging method for millimeter wave radar | |
| US20240013472A1 (en) | Surface Determination Systems, Threat Detection Systems and Medical Treatment Systems | |
| Lao et al. | Three-dimensional short-range microwave holographic imaging algorithm and imaging system scheme | |
| Swain et al. | A Novel Approach for Quantifying Impact and Abrasive Wear by Short Range mmWave InSAR | |
| Yang et al. | Shape Reconstruction of Concave Objects Based on High-Order Boundary Scattering Transform for Millimeter-Wave Near-Field Imaging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |