CN109856696A - Millimeter wave/THz wave imaging device and human body or article detection method - Google Patents
Millimeter wave/THz wave imaging device and human body or article detection method Download PDFInfo
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- CN109856696A CN109856696A CN201811654178.2A CN201811654178A CN109856696A CN 109856696 A CN109856696 A CN 109856696A CN 201811654178 A CN201811654178 A CN 201811654178A CN 109856696 A CN109856696 A CN 109856696A
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Abstract
Present disclose provides a kind of millimeter wave/THz wave imaging device and human body or article detection methods comprising quasi-optics component, for by checked object spontaneous radiation or reflected beams reflected and converging to detector array, and including reflecting plate；Detector array, for receiving the wave beam from quasi-optics component；And reflecting plate regulating device, it includes rotating mechanism, for driving reflecting plate rotary motion in the horizontal direction, so that the wave beam that reflecting plate is located at visual field different level position part to checked object reflects, with pitching mechanism, for driving reflecting plate in vertical direction pitching, when reflecting plate often rotates by a certain angle under rotating mechanism drive, pitching mechanism drives reflecting plate in vertical direction pitching, so that reflecting plate reflects the wave beam for the part for being located at visual field difference vertical position from checked object, so that sampling in intensive point set among full filed, and in most of region of visual field, sampled point arrangement is uniform.
Description
Technical field
This disclosure relates to safety check technical field, more particularly to a kind of millimeter wave/THz wave imaging device, Yi Jili
The method that human body or article are detected with above-mentioned millimeter wave/THz wave imaging device.
Background technique
Based on passive millimeter wave/THz wave human body safety check technology, has the advantages that uniqueness, by detecting target
The millimeter wave of/terahertz radiation itself realizes imaging, without actively radiating, carries out safety check to human body, utilizes millimeter wave/too
The penetration capacity of Hertz wave realizes the detection for concealing danger.According to the difference of imaging system, passive millimeter wave and Terahertz
Wave imaging technique can be divided into focal plane imaging system and the imaging system based on mechanical scanning.
Millimeter wave terahertz camera based on focal plane imaging technology is using complicated technology and needs special dress
It sets, the basic principle is that by the plurality of cells antenna and reflecting mirror appropriate, lens that are distributed on focal plane to target
Different location is imaged simultaneously.It, can be with using focal plane array array antenna such as the NGC system of Northrop Grumman company, the U.S.
Realize real time imagery, but system complex, such as NGC system at 15 ° of level, the angle that vertical 10 ° of visual field resolution ratio is 0.5 °
Resolution ratio needs 1040 detectors.In order to reduce system cost and complexity, the solution of current main-stream is one dimensional line
Property detector array plus the mode of mechanical scanning imaging is scanned to entire visual field.
Typical detector array is linearly distributed and when detector conical scanning, and the linear arrangement of detector leads to figure
As the middle section of visual field compared to edge sampling density it is much lower, and fringe region compared to central area be we less
The place of care.In addition, rotation image (not rotating entire camera) may cause some potential letters of loss to such arrangement
Breath.
Summary of the invention
The disclosure is designed to provide a kind of millimeter wave/THz wave imaging device, so that sampling in intensive point set
Among full filed, and in most of region of visual field, sampled point arrangement is uniform.
The purpose of the disclosure also reside in provide it is a kind of using millimeter wave/THz wave imaging device to human body or article into
The method of row detection, the testing result of this method is more accurate, is particularly suitable for carrying out the various of safety detection to human body or article
Using.
According to the embodiment of disclosure one aspect, a kind of millimeter wave/THz wave imaging device is provided comprising:
Quasi-optics component, millimeter wave/terahertz wave detector array and reflecting plate regulating device,
The quasi-optics component is suitable for checked object spontaneous radiation or reflected millimeter wave/THz wave is anti-
The millimeter wave/terahertz wave detector array is penetrated and converged to, and receives and is reflected from checked object including being suitable for
The reflecting plate of wave beam；
The millimeter wave/terahertz wave detector array is suitable for receiving the wave beam from the quasi-optics component；And
The reflecting plate regulating device includes:
Rotating mechanism, the rotating mechanism are suitable for driving the reflecting plate rotary motion in the horizontal direction, so that
The reflecting plate to the checked object be located at visual field different level position part spontaneous radiation or reflected wave beam into
Row reflection, and
Pitching mechanism, the pitching mechanism are suitable for driving reflecting plate pitching pendulum in the vertical direction
Dynamic, often to rotate by a certain angle under the drive of the rotating mechanism when the reflecting plate, the pitching mechanism drives institute
It states reflecting plate and carries out pitching in the vertical direction, so that the reflecting plate is located at the visual field to the checked object
The part spontaneous radiation of different vertical positions or reflected wave beam are reflected.
In some embodiments, the rotating mechanism includes:
Pedestal；With
Turntable, the turntable are connect with the pedestal rotary type, and the reflecting plate is installed on the turntable, in institute
State rotary motion in the horizontal direction under the drive of turntable；
Driving device for rotary desk, the driving device for rotary desk are connect with the turntable, are suitable for driving the turntable rotation.
In some embodiments, the turntable includes:
Turntable ontology, the turntable ontology are suitable for connecting with the pedestal rotary type；With
Inverted L bracket, the one end of the L bracket are connect with the turntable ontology, the L bracket it is another
One end is connect with the pitching mechanism.
In some embodiments, the quantity of the L bracket is two, and two L brackets are correspondingly arranged at described
The two sides of pitching mechanism.
In some embodiments, the pitching mechanism includes:
Crank link mechanism, the crank of the crank link mechanism are connect with the reflecting plate, and with the L bracket
Rotary type connection, the connecting rod of the crank link mechanism is slidably connected with the L bracket, with pass through the connecting rod relative to
The rotation of the L bracket slided to drive the crank, and then drive the pitching of the reflecting plate；
Pitching driving device, the pitching driving device are suitable for driving the connecting rod relative to the L shape
The sliding motion of bracket.
In some embodiments, the crank uses semicircular plate, the diameter portion of the semicircular plate and the reflection
Plate connection.
In some embodiments, guide part, the rod slide of the crank link mechanism are provided in the L bracket
Ground is set in the guide part.
In some embodiments, it is provided with angle displacement measurement mechanism on the turntable, for measuring the angle position of the turntable
It moves.
In some embodiments, the L-shaped structure of the pedestal, and connect including horizontal part and with the horizontal part
Vertical portion.
In some embodiments, millimeter wave/THz wave imaging device further includes being suitable for installing the millimeter wave/too
The detector platform of Hertz wave detector array, the detector platform are fixed on the vertical portion of the L-shaped structure.
In some embodiments, the quasi-optics component further includes being suitable for converging the wave beam from the reflecting plate
Condenser lens, the condenser lens are located at the reflecting plate and the millimeter wave/THz wave detection along the path of the wave beam
Between device array.
In some embodiments, millimeter wave/THz wave imaging device further includes being suitable for installing the condenser lens
Lens carrier, the lens carrier are arranged on the vertical portion of the L-shaped structure.
In some embodiments, the quasi-optics component further includes being suitable for converging the wave beam from the checked object
Condenser lens, the condenser lens is between the reflecting plate and checked object.
In some embodiments, multiple millimeter wave/THz waves in the millimeter wave/terahertz wave detector array
Detector is linearly distributed or biserial is staggered.
In some embodiments, the reflecting plate is plane.
In some embodiments, the reflecting plate uses smooth metal surface or metal gate grid.
In some embodiments, the reflecting plate is fresnel reflecting mirror or parabolic mirror.
In some embodiments, millimeter wave/THz wave imaging device further include:
Data processing equipment, the data processing equipment are connect with the millimeter wave/terahertz wave detector array to connect
It receives and for the scan data of checked object and generates millimeter wave/terahertz from the millimeter wave/terahertz wave detector array
Hereby wave image；With
Display device, the display device are connected with the data processing equipment, for receiving and showing from data
The millimeter wave of processing unit/THz wave image.
According to the embodiment of disclosure another aspect, provide it is a kind of using millimeter wave/THz wave imaging device to people
The method that body or article are detected, comprising the following steps:
Step S1: rotating mechanism driving reflecting plate often rotates by a certain angle in the horizontal direction, the driving of pitching mechanism
The reflecting plate swings N in the vertical directionvIt is secondary, to be successively located at the part of visual field difference vertical position certainly to checked object
Hair radiation or reflected millimeter wave/THz wave are reflected, and rotating mechanism drives the reflecting plate in the horizontal direction
Rotate NhIt is secondary, to be successively located at the part spontaneous radiation of visual field different level position to the checked object or be reflected back
Millimeter wave/the THz wave come is reflected；
Step S2: by millimeter wave/terahertz wave detector array scan data obtained for the checked object
It is sent to data processing equipment；With
Step S3: the scan data is rebuild using the data processing equipment to generate the checked object
Millimeter wave/THz wave image.
In some embodiments, the reflecting plate is completed needed for the reflection to the vertical range of visual field where checked object
The times N to be swungvIt is calculate by the following formula:
In formula, [], expression rounded up；
L is distance of the field of view center to reflecting plate center；
H0For the static visual field of millimeter wave/terahertz wave detector arrangement；
θmFor field of view angle corresponding to the vertical range H of visual field.
In some embodiments, time of rotation required for the reflection to the visual field horizontal extent where checked object is completed
Number NhIt is calculate by the following formula:
In formula, [], expression rounded up；
V is visual field horizontal extent；
D is the center spacing of two adjacent millimeter wave/terahertz wave detectors；
L1For object distance；
L2For image distance.
It in some embodiments, further include step S4: in the millimeter wave/THz wave image for generating the checked object
Later, the position for whether having suspicious item and suspicious item to the checked object identify and export result.
It is examined according to millimeter wave/THz wave imaging device described in the above-mentioned various embodiments of the disclosure and human body or article
Survey method drives reflecting plate rotation by rotating mechanism, when reflecting plate often rotates by a certain angle under the drive of rotating mechanism,
Pitching mechanism driving reflecting plate carries out pitching in the vertical direction, passes through the rotating mechanism of reflecting plate regulating device
Cooperation with pitching mechanism can make reflecting plate reflect visual field comprehensively, and sample in intensive point set in full filed
Centre, in addition, uniformly, interpolation is convenient for sampled point arrangement in most of region of visual field.
Detailed description of the invention
Fig. 1 is the schematic front view according to the reflecting plate regulating device of one embodiment of the disclosure；
Fig. 2 is the schematic side view of reflecting plate regulating device shown in FIG. 1；
Fig. 3 is a kind of millimeter wave/THz wave imaging device schematic illustration according to the disclosure；
Fig. 4 is a kind of fit system of the reflecting plate rotary motion and pitching according to one embodiment of the disclosure
Schematic diagram；
Fig. 5 is another cooperation side of the reflecting plate rotary motion and pitching according to one embodiment of the disclosure
The schematic diagram of formula；
Fig. 6 is the schematic diagram of the reflecting plate pitching and the vertical range of visual field according to one embodiment of the disclosure；
Fig. 7 is the schematic diagram of lens imaging；
Fig. 8 is millimeter wave/THz wave imaging device operation schematic diagram according to one embodiment of the disclosure；
Fig. 9 is millimeter wave/THz wave imaging device operation schematic diagram according to another embodiment of the present disclosure；
Figure 10 is the structure according to the condenser lens of another embodiment of the present disclosure between checked object and reflecting plate
Schematic diagram；And
Figure 11 is to be examined using millimeter wave/THz wave imaging device to human body or article according to a kind of of the disclosure
The flow chart of the method for survey.
Specific embodiment
Although by the disclosure is fully described referring to the attached drawing of the preferred embodiment containing the disclosure, before being described herein
It should be appreciated that those skilled in the art can modify disclosure described herein, while obtaining the technical effect of the disclosure.
Thus, it should be understood that above description is an extensive announcement for those of ordinary skill in the art, and its content is not lain in
Limit exemplary embodiment described in the disclosure.
In addition, in the following detailed description, convenient for explaining, to elaborate many concrete details to provide to originally draping over one's shoulders
Reveal the comprehensive understanding of embodiment.It should be apparent, however, that one or more embodiments without these specific details may be used
To be carried out.In other cases, well known construction and device is diagrammatically embodied to simplify attached drawing.
Fig. 1 to Fig. 3 schematically shows millimeter wave/THz wave imaging device of the embodiment according to the disclosure.
The imaging device includes quasi-optics component, reflecting plate regulating device and millimeter wave/terahertz wave detector array 2, wherein quasi-optical
Component is learned to be suitable for reflecting millimeter wave/THz wave of 31 spontaneous radiation of checked object and converging to millimeter wave/THz wave
Detector array 2, and including the reflecting plate 1 for being suitable for receiving and reflecting the wave beam from checked object 31 and it is suitable for convergence
The condenser lens 4 of wave beam from reflecting plate 1.Millimeter wave/terahertz wave detector array 2 is suitable for receiving by quasi-optics group
Part reflect and converge after wave beam.Reflecting plate regulating device includes rotating mechanism 6 and pitching mechanism 7, wherein rotating mechanism
6 are suitable for the driving rotary motion in the horizontal direction of reflecting plate 1, so that reflecting plate 1 is located at 3 difference of visual field to checked object
The wave beam of the part spontaneous radiation of horizontal position is reflected；Pitching mechanism 7 is suitable for driving reflecting plate 1 in vertical side
Upward pitching, often to rotate by a certain angle under the drive of rotating mechanism 6 when reflecting plate 1, pitching mechanism 7 is driven
Reflecting plate 1 carries out one or many pitchings in the vertical direction, so that reflecting plate 1 is located at visual field 3 to checked object 31
The wave beam of the part spontaneous radiation of different vertical positions is reflected.
In accordance with an embodiment of the present disclosure, the millimeter wave/THz wave imaging device by reflecting plate 1 receive and reflect by
Millimeter wave/THz wave of 31 spontaneous radiation of checked object, and by millimeter wave/Terahertz after the convergence effect of line focus lens 4
Wave detector array 2 receives, and drives reflecting plate 1 to rotate by rotating mechanism 6, when under drive of the reflecting plate 1 in rotating mechanism 6
It often rotates by a certain angle, pitching mechanism 7 drives reflecting plate 1 to carry out one or many pitchings in the vertical direction, leads to
The cooperation of the rotating mechanism 6 and pitching mechanism 7 of crossing reflecting plate regulating device can make reflecting plate 1 carry out full visual field 3
Face reflection, and sample in intensive point set among visual field 3, in addition, sampled point arrangement is uniform in most of region of visual field 3,
Interpolation is convenient.
It should be noted that, although in this embodiment, the wave beam that reflecting plate 1 reflects is 31 spontaneous radiation of checked object
Millimeter wave or THz wave, however it will be understood by those of skill in the art that the wave beam may be to be irradiated to checked object
31 and through the reflected millimeter wave/THz wave of checked object 31.
As depicted in figs. 1 and 2, in one exemplary embodiment, rotating mechanism 6 includes pedestal 61 and turntable, wherein
The turntable is connect with 61 rotary type of pedestal, and reflecting plate 1 is mounted on turntable, to revolve in the horizontal direction under the drive of turntable
Transhipment is dynamic, so that reflecting plate 1 under the drive of turntable, is successively located at 3 different level position of visual field to checked object 31
The wave beam of part spontaneous radiation is reflected, i.e. the data acquisition of completion 3 horizontal direction of visual field.The rotating mechanism 6 further includes fitting
It should be in the driving device for rotary desk (such as driving motor) 64 of driving turntable rotation, to drive turntable continuously to revolve with certain speed
Turn, such as 1 revolutions per second to 24 revolutions per seconds.The millimeter wave/THz wave imaging device is by the rotation of turntable to checked object 31
It is reflected in millimeter wave/THz wave of the part spontaneous radiation of 3 different level position of visual field, it is possible to reduce millimeter wave/too
Millimeter wave/terahertz wave detector quantity in Hertz wave detector array 2.
As depicted in figs. 1 and 2, in one exemplary embodiment, turntable includes turntable ontology 62 and two inverted L
Shape bracket 63, wherein rotation ontology 62 is suitable for connecting with 61 rotary type of pedestal；Two L brackets 63 are symmetricly set on pitching
The two sides of swing mechanism 7, and the one end of two L brackets 63 is connect with turntable ontology 62, the other end of L bracket 63
It is connect with pitching mechanism 7, pitching mechanism 7 is able to drive by the rotation of turntable in this way and is turned in the horizontal direction
It is dynamic, and then the reflecting plate 1 connecting with pitching mechanism 7 is driven to rotate in the horizontal direction.
It should be noted that it will be understood by those of skill in the art that in some other embodiment of the disclosure, L shape
The quantity of bracket 63 may be one.
As depicted in figs. 1 and 2, in one exemplary embodiment, pitching mechanism 7 includes crank link mechanism, bent
The crank of handle link mechanism uses semicircular plate 71, and the diameter portion of semicircular plate 71 is connect with reflecting plate 1, semicircular plate 71
The center point connect with two 63 rotary types of L shape bracket respectively by shaft 73；The connecting rod 72 and L shape branch of crank link mechanism
Frame 63 is slidably connected, to drive the rotation of semicircular plate 71, and then band relative to the sliding of L bracket 63 by connecting rod 72
The pitching of dynamic reflecting plate 1, to adjust the angle between reflecting plate 1 and vertical direction, realization is located at checked object 31
Millimeter wave/THz wave of the part spontaneous radiation of the different vertical positions of visual field 3 is reflected, i.e. completion 3 vertical direction of visual field
Data acquisition.In addition, pitching mechanism 7 further includes being suitable for sliding motion of the drive link 72 relative to L bracket 63
Pitching driving device, such as linear actuators.
As depicted in figs. 1 and 2, in one exemplary embodiment, the guide part 74 of tubular is provided in L bracket 63,
The connecting rod 72 of crank link mechanism is slidably set in the guide part 74, can guarantee connecting rod 72 relative to L bracket in this way
63 sliding.
In addition, the angle displacement measurement mechanism (not shown) of the angular displacement suitable for measuring circurmarotate is additionally provided on turntable, with
Just the rotation amplitude for controlling turntable, makes it only work in the horizontal extent of visual field 3.
As depicted in figs. 1 and 2, in one exemplary embodiment, the L-shaped structure of pedestal 61 comprising horizontal part and
The vertical portion being substantially vertically arranged with the horizontal part, intermediate station are pivotally mounted on the horizontal part of pedestal 61.
As depicted in figs. 1 and 2, in one exemplary embodiment, which further includes being suitable for installation millimeter
Wave/terahertz wave detector array 2 detector platform 8, the detector platform 8 are mounted on the vertical portion of L-shaped structure, with
The wave beam from quasi-optics component is received convenient for millimeter wave/terahertz wave detector array 2.
As shown in Figure 1 to Figure 3, in one exemplary embodiment, condenser lens 4 is located at reflecting plate 1 along the path of wave beam
Between millimeter wave/terahertz wave detector array 2.It should be noted that it will be understood by those of skill in the art that at this
In some other disclosed embodiment, condenser lens 4 also be can be set between reflecting plate 1 and checked object 31, i.e., and tested pair
As 31 spontaneous radiations millimeter wave or THz wave pass through convergent lens 4, millimeter wave/terahertz is then reflexed to by reflecting plate 1
It hereby wave detector array 2 and is received by millimeter wave/terahertz wave detector array 2, as shown in Figure 10.
As depicted in figs. 1 and 2, in one exemplary embodiment, which further includes being suitable for installation to focus thoroughly
The lens carrier 5 of mirror 4, the lens carrier 5 are fixed on the vertical portion of L-shaped structure, and are located at detector platform 8 and reflection
Between plate 1.
In one exemplary embodiment, millimeter wave/terahertz wave detector array 2 is in staggered (such as Fig. 9 of biserial
It is shown), the arragement direction of each column is parallel with visual field normal direction.Herein, visual field normal direction refer to from the center of reflecting plate 1 to
The direction of the horizontal line of the longitudinal centre line of visual field 3.Millimeter wave/terahertz in millimeter wave/terahertz wave detector array 2
Hereby the number of wave detector is determined according to required visual field size and required resolution ratio, and millimeter wave/terahertz wave detector is big
It is small to be determined according to wavelength, processing technology and required sampling density etc..It should be noted that those skilled in the art should
Understand, in some other embodiment of the disclosure, millimeter wave/terahertz wave detector array 2 can also be linearly distributed
(as shown in Figure 8), arragement direction are also parallel with visual field normal direction.
In visual field 3, the fit system of rotary motion and pitching can use " N " font or snakelike.Wherein, such as
Shown in Fig. 4, the characteristics of " N " font is: pitching starting point always in 3 bottom of visual field (being also possible to top), reflects from the bottom to top
(or from top to bottom reflecting), after having reflected a column, millimeter wave/terahertz wave detector array 2 returns to starting pitch angle, to water
Square to rotation to after next angle, repeatedly pitching process again.As shown in figure 5, snakelike feature is adjacent two column
Pitching track it is end to end, the time for returning to zero position has been saved relative to " N " font.
In addition, it should be noted that, it will be understood by those of skill in the art that in some embodiments of the present disclosure, instead
Penetrating plate 1 can be plane, such as smooth metal surface or metal gate grid, in the other embodiment of the disclosure,
Reflecting plate 1 is also possible to nonplanar, such as fresnel reflecting mirror or parabolic mirror.
In one embodiment of the present disclosure, which can also include data processing equipment (not shown).The number
It is wirelessly connected according to processing unit and millimeter wave/terahertz wave detector array 2 or wired connection to receive comes from millimeter wave/too
Hertz wave detector array 2 for the scan data collected of checked object 3 and generate millimeter wave/THz wave image.It should
Imaging device can also include display device, which is connected with data processing equipment, comes from for receiving and showing
The millimeter wave of data processing equipment/THz wave image.
In one exemplary embodiment, data processing equipment can be used for generating control signal and will control signal hair
Giving driving device for rotary desk and pitching driving device, turntable rotates and/or pitching mechanism 7 is swung to drive.Another
In one exemplary embodiment, imaging device also may include and the mutually independent control device of data processing equipment.
As shown in figure 11, the disclosure additionally provide it is a kind of using millimeter wave/THz wave imaging device to human body or article
The method detected, comprising the following steps:
Step S1: rotating mechanism 6 drives reflecting plate often to rotate by a certain angle in the horizontal direction, and pitching mechanism 7 drives
Dynamic reflecting plate 1 swings N in the vertical directionvIt is secondary, to be successively located at the part of the different vertical positions of visual field 3 to checked object 31
Millimeter wave/THz wave of spontaneous radiation is reflected, and rotating mechanism 6 drives reflecting plate 1 to rotate N in the horizontal directionhIt is secondary,
It is carried out instead with being successively located at millimeter wave/THz wave of the part spontaneous radiation of 3 different level position of visual field to checked object 31
It penetrates；
Step S2: by millimeter wave/terahertz wave detector array 2 scan data obtained for checked object 31
It is sent to data processing equipment；With
Step S3: scan data is rebuild using data processing equipment to generate the millimeter wave of checked object 31/too
Hertz wave image.
This method can accurately carry out comprehensive imaging and detection to checked object 31, and wherein checked object 31 can
To be human body, it is also possible to article.
Fig. 6 shows the pitching of reflecting plate 1 and the schematic diagram of the vertical range of visual field.As shown in Fig. 6, millimeter wave/too
The static visual field of Hertz wave detector array 2 is H0, the horizontal distance at center to the center of reflecting plate 1 of visual field 3 is L, vertically
Field range is H, and field of view angle corresponding to the vertical field range H is θm.Reflecting plate 1 swings θ, corresponding field of view angle
Change 2 θ, so field of view angle corresponding to vertical field range H is θm, the swing angle of corresponding reflecting plate 1 is θm/2。
Wherein, reflecting plate 1 completes time of swing required for the reflection to the vertical range of visual field 3 where checked object 31
Number NvIt is calculate by the following formula:
In formula, [], expression rounded up；
L be visual field 3 center to the center of reflecting plate 1 distance；
H0For the static visual field of millimeter wave/terahertz wave detector arrangement 2；
θmFor field of view angle corresponding to vertical field range H.
It is assumed that millimeter wave/terahertz wave detector number is N, two adjacent millimeter wave/terahertz wave detectors
When the spacing d of center, then the maximum offset-fed distance y of millimeter wave/terahertz wave detectorm, then
It is possible thereby to which calculating the static visual field of millimeter wave/terahertz wave detector array 2 is H0.As shown in fig. 7, milli
The static visual field H of metric wave/terahertz wave detector array 20With object distance L1, image distance L2Need to meet following relational expression
Complete the times N of rotation required for the reflection to 3 horizontal extent of visual field where checked object 31hPass through following formula
It calculates:
In formula, [], expression rounded up；
V is visual field horizontal extent；
D is the center spacing of two adjacent millimeter wave/terahertz wave detectors；
L1For object distance；
L2For image distance.
The angle that rotating mechanism 6 drives reflecting plate 1 to rotate every time in the horizontal direction should be according to millimeter wave/THz wave
The static visual field of detector array 2 in the horizontal direction determines.Similarly, the angle that pitching mechanism 7 is swung answers root
It is determined according to the static visual field of millimeter wave/terahertz wave detector array in the vertical direction.
Property embodiment as an example, this method can also include:
Step S4: generate checked object 31 millimeter wave/THz wave image after, to checked object 31 whether band
There is the position of suspicious item 32 and suspicious item 32 identify and export result.
In above-mentioned steps S4, for the identification of suspicious item 32 and its position can by Computer Automatic Recognition or
The method that manual identified or the two combine carries out.As a result output can be indicated for example, by showing on the display apparatus
It directly displays and whether has the modes such as the conclusion of suspicious item 32 to realize, result can also be will test and directly print or send.
Execute detection security staff can according to the testing result that above-mentioned steps S4 is provided come to human body or article whether
Position with suspicious item 32 and suspicious item 32 is confirmed, can also be checked by artificial detection.
As shown in figure 8, in one exemplary embodiment, millimeter wave/terahertz wave detector number N is 20, and
In a column arrangement, the center spacing d of two adjacent millimeter wave/terahertz wave detectors is 7mm, maximum offset-fed distance ymFor
7cm.Object distance L1For 3.5m, image distance L2For 0.7m, static visual field H can be calculated according to formula (3)0=70cm.In order to complete
The vertical range H of visual field is the reflection of 2m, and the number of required swing is 3, respectively " angle θ in pitchingOn", " angle θ in pitchingIn”
" pitching inferior horn θUnder".To the times N of rotation required for visual field horizontal extent 1mhAt least 29, it ultimately forms as shown in Figure 8
Visual field distribution.
As shown in figure 9, in one exemplary embodiment, millimeter wave/terahertz wave detector number N is 40, and is in
Biserial is staggered, and two adjacent millimeter wave/terahertz wave detector center spacing d are 14mm in each column, maximum inclined
Present distance ymFor 14cm.Object distance L1For 3.5m, image distance L2For 0.7m, static visual field H can be calculated according to formula (3)0=
90cm.In order to complete the reflection that the vertical range H of visual field is 1.8m, the number of required swing is 2, respectively " angle in pitching
θOn" and " pitching inferior horn θUnder"；To the times N of rotation required for visual field horizontal extent 1mhAt least 15, it ultimately forms such as Fig. 9 institute
The visual field distribution shown.
It is examined according to millimeter wave/THz wave imaging device described in the above-mentioned various embodiments of the disclosure and human body or article
Survey method drives reflecting plate 1 to rotate by rotating mechanism 6, when the certain angle of rotation every under drive of the reflecting plate 1 in rotating mechanism 6
Degree, pitching mechanism 7 drive reflecting plate 1 to carry out pitching in the vertical direction, pass through the rotation of reflecting plate regulating device
The cooperation of mechanism 6 and pitching mechanism 7 can make reflecting plate 1 reflect visual field 3 comprehensively, and sample in intensive point set
Among full filed, in addition, uniformly, interpolation is convenient for sampled point arrangement in most of region of visual field.
It will be understood to those skilled in the art that embodiment described above is all exemplary, and this field
Technical staff can make improvements, and structure described in various embodiments is in terms of not recurring structure or principle
It can be freely combined in the case where conflict.
After the preferred embodiment that the disclosure is described in detail, those skilled in the art can be apparent from,
It does not depart from the protection scope of appended claims and spirit is lower can carry out various change and change, and the disclosure is also not only restricted to
The embodiment of examples cited embodiment in specification.
Claims (22)
1. a kind of millimeter wave/THz wave imaging device comprising: quasi-optics component, millimeter wave/terahertz wave detector array
With reflecting plate regulating device,
The quasi-optics component is suitable for that checked object spontaneous radiation or reflected millimeter wave/THz wave are reflected and converged
Gather to the millimeter wave/terahertz wave detector array, and including being suitable for receiving and reflecting the wave beam from checked object
Reflecting plate；
The millimeter wave/terahertz wave detector array is suitable for receiving the wave beam from the quasi-optics component；And
The reflecting plate regulating device includes:
Rotating mechanism, the rotating mechanism is suitable for driving the reflecting plate rotary motion in the horizontal direction, so that described
Reflecting plate is located at the part spontaneous radiation of visual field different level position to the checked object or reflected wave beam carries out instead
It penetrates, and
Pitching mechanism, the pitching mechanism are suitable for driving reflecting plate pitching in the vertical direction, with
When often rotating by a certain angle under drive of the reflecting plate in the rotating mechanism, the pitching mechanism drives the reflection
Plate carries out pitching in the vertical direction, so that the reflecting plate is located at the visual field difference vertically to the checked object
The part spontaneous radiation of position or reflected wave beam are reflected.
2. imaging device according to claim 1, wherein the rotating mechanism includes:
Pedestal；With
Turntable, the turntable are connect with the pedestal rotary type, and the reflecting plate is installed on the turntable, in the turntable
Drive under rotary motion in the horizontal direction；
Driving device for rotary desk, the driving device for rotary desk are connect with the turntable, are suitable for driving the turntable rotation.
3. imaging device according to claim 2, wherein the turntable includes:
Turntable ontology, the turntable ontology are suitable for connecting with the pedestal rotary type；With
Inverted L bracket, the one end of the L bracket are connect with the turntable ontology, the other end of the L bracket
It is connect with the pitching mechanism.
4. imaging device according to claim 3, wherein the quantity of the L bracket is two, two L shape branch
Frame is correspondingly arranged at the two sides of the pitching mechanism.
5. imaging device according to claim 3, wherein the pitching mechanism includes:
Crank link mechanism, the crank of the crank link mechanism are connect with the reflecting plate, and with the L bracket rotary type
Connection, the connecting rod of the crank link mechanism is slidably connected with the L bracket, with by the connecting rod relative to the L shape
The rotation of bracket slided to drive the crank, and then drive the pitching of the reflecting plate；
Pitching driving device, the pitching driving device are suitable for driving the connecting rod relative to the L bracket
Sliding motion.
6. imaging device according to claim 5, wherein the crank use semicircular plate, the semicircular plate it is straight
Path portion is connect with the reflecting plate.
7. imaging device according to claim 5, wherein be provided with guide part, the crank connecting link in the L bracket
It is set in the guide part to the rod slide of mechanism.
8. imaging device according to claim 2, wherein angle displacement measurement mechanism is provided on the turntable, for surveying
Measure the angular displacement of the turntable.
9. imaging device according to claim 2, wherein the L-shaped structure of pedestal, and including horizontal part and with institute
State the vertical portion of horizontal part connection.
10. imaging device according to claim 9, wherein further include being suitable for installing the millimeter wave/THz wave to visit
The detector platform of device array is surveyed, the detector platform is fixed on the vertical portion of the L-shaped structure.
11. imaging device according to claim 9, wherein the quasi-optics component further includes being suitable for convergence from institute
The condenser lens of the wave beam of reflecting plate is stated, the condenser lens is located at the reflecting plate and the millimeter along the path of the wave beam
Between wave/terahertz wave detector array.
12. imaging device according to claim 11, wherein further include the lens branch suitable for installing the condenser lens
Frame, the lens carrier are arranged on the vertical portion of the L-shaped structure.
13. imaging device according to claim 1, wherein the quasi-optics component further includes being suitable for convergence from institute
The condenser lens of the wave beam of checked object is stated, the condenser lens is between the reflecting plate and checked object.
14. imaging device according to claim 1, wherein multiple in the millimeter wave/terahertz wave detector array
Millimeter wave/terahertz wave detector is linearly distributed or biserial is staggered.
15. imaging device described in any one of -14 according to claim 1, wherein the reflecting plate is plane.
16. imaging device according to claim 15, wherein the reflecting plate uses smooth metal surface or metal gate
Grid.
17. imaging device described in any one of -14 according to claim 1, wherein the reflecting plate is fresnel reflecting mirror
Or parabolic mirror.
18. imaging device described in any one of -14 according to claim 1, wherein further include:
Data processing equipment, the data processing equipment are connect to receive and with the millimeter wave/terahertz wave detector array
For the scan data of checked object and millimeter wave/THz wave is generated from the millimeter wave/terahertz wave detector array
Image；With
Display device, the display device are connected with the data processing equipment, for receiving and showing from data processing
The millimeter wave of device/THz wave image.
19. a kind of method detected using millimeter wave/THz wave imaging device to human body or article, including following step
It is rapid:
Step S1: rotating mechanism driving reflecting plate often rotates by a certain angle in the horizontal direction, described in the driving of pitching mechanism
Reflecting plate swings N in the vertical directionvIt is secondary, to be successively located at the part spontaneous radiation of visual field difference vertical position to checked object
Or reflected millimeter wave/THz wave is reflected, rotating mechanism drives the reflecting plate to rotate N in the horizontal directionh
It is secondary, with successively to the checked object be located at visual field different level position part spontaneous radiation or reflected millimeter
Wave/THz wave is reflected；
Step S2: millimeter wave/terahertz wave detector array scan data obtained for the checked object is sent
To data processing equipment；With
Step S3: the scan data is rebuild using the data processing equipment to generate the millimeter of the checked object
Wave/THz wave image.
20. according to the method for claim 19, wherein the reflecting plate is completed to the vertical model of visual field where checked object
The times N swung required for the reflection enclosedvIt is calculate by the following formula:
In formula, [], expression rounded up；
L is distance of the field of view center to reflecting plate center；
H0For the static visual field of millimeter wave/terahertz wave detector arrangement；
θmFor field of view angle corresponding to the vertical range H of visual field.
21. according to the method for claim 20, wherein complete the reflection institute to the visual field horizontal extent where checked object
The times N for needing to rotatehIt is calculate by the following formula:
In formula, [], expression rounded up；
V is visual field horizontal extent；
D is the center spacing of two adjacent millimeter wave/terahertz wave detectors；
L1For object distance；
L2For image distance.
22. method described in any one of 9-21 according to claim 1, wherein further include step S4: described tested generating
After the millimeter wave of object/THz wave image, to the checked object whether have the position of suspicious item and suspicious item into
Row identifies and exports result.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811654178.2A CN109856696A (en) | 2018-12-29 | 2018-12-29 | Millimeter wave/THz wave imaging device and human body or article detection method |
| PCT/CN2019/110375 WO2020134333A1 (en) | 2018-12-29 | 2019-10-10 | Millimeter wave/terahertz wave imaging equipment and human or object detecting method |
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| CN201811654178.2A CN109856696A (en) | 2018-12-29 | 2018-12-29 | Millimeter wave/THz wave imaging device and human body or article detection method |
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