CN104076358B - A kind of passive millimeter imaging rays safety detection apparatus - Google Patents

Abstract

The invention discloses a kind of passive millimeter imaging rays safety detection apparatus, including: one-dimensional Caustic method (1), reflecting plate (3), aobvious control subsystem (4), signal processor (5), internal calibration combination (6), reflecting plate rotating mechanism (7), media panels (8), frame (9), monitor station (11), ellipsoid reflecting surface (2) and outer calibration combination (10).Ellipsoid reflecting surface (2) focuses on the electromagnetic wave of human body radiation, one-dimensional Caustic method (1) is converted into voltage signal the electromagnetic wave after focusing, signal processor (5) gathers voltage signal and gives aobvious control subsystem (4), and aobvious control subsystem (4) exports two dimensional gray figure after processing.Use internal calibration combination (6) to carry out associating calibration with outer calibration combination (10), improve picture quality.Metal, nonmetal prohibited items can be detected.The present invention has that system loss is little, highly sensitive, reliability is high, low cost, the advantage such as lightweight.

Description

A kind of passive millimeter imaging rays safety detection apparatus

Technical field

The present invention relates to a kind of rays safety detection apparatus, particularly a kind of passive millimeter imaging rays safety detection apparatus.

Background technology

Current passive millimeter imaging rays safety detection apparatus includes: Caustic method, reflecting plate, aobvious control subsystem, signal processor, Internal calibration combination, reflecting plate rotating mechanism, media panels, frame, concentrating element, monitor station.Caustic method uses face battle array or line Battle array, the element of its focal plane mainly uses direct detection formula radiometer and superhet radiometer, and the former need not local oscillator, volume Little being prone to of weight organizes battle array, and broader bandwidth, temperature control is higher, but higher to the detection device sensitivity requirement in radiometer. The latter's Project Realization is simple, but bandwidth is not the most easy to do greatly, and temperature control is poor, needs local oscillation signal, is difficult to organize battle array.One As use lens as concentrating element, lens many selections dielectric material, such as: politef, dielectric material intensity is less, suitable Close the system small-bore, resolution requirement is the highest.When systemic resolution requires higher, owing to aperture of lens increase, thickness increase, Cause Insertion Loss to become greatly, system temperature resolution declines, cost raises.The weight of heavy caliber di-lens reaches up to a hundred kilograms, by This kind of material common intensity is little, can produce the deformation of lens, cause hydraulic performance decline even to lose efficacy in engineer applied.

Summary of the invention

It is an object of the invention to provide a kind of passive millimeter imaging rays safety detection apparatus, solve heavy caliber di-lens Insertion Loss big, Malformation, the problem that hydraulic performance decline even lost efficacy.

A kind of passive millimeter imaging rays safety detection apparatus, including: one-dimensional Caustic method, reflecting plate, aobvious control subsystem, signal processing The combination of machine, internal calibration, reflecting plate rotating mechanism, media panels, frame and monitor station, also include: ellipsoid reflecting surface and outer fixed Mark combination.Described one-dimensional Caustic method, including: reception antenna and radiometer.Described internal calibration combination, including: room temperature is fixed Mark source, high temperature reference source, rotary electric machine and mechanical fastener.Described room temperature reference source, including: absorbing material A, metal Structure A and temperature sensor A.Described high temperature reference source, including: absorbing material B, metal structure B, heater and temperature Sensor B.Described outer calibration combination, including: structure-steel framing and absorbing material C.Described aobvious control subsystem, including: image Processing module, system control module and human-computer interaction module.

The function of image processing module has been the filtering of view data, image non-linear strengthens and image is split.System controls mould The function of block has been the communication with signal processor, it is achieved to reflecting plate rotating mechanism, the control of internal calibration combination and reception letter The data of number datatron loopback.The function of human-computer interaction module is to provide human-computer interaction interface, it is simple to operator use.

Outer calibration combination is placed in the dead ahead of media panels side.Monitor station is placed on the structure-steel framing of outer calibration combination, and media panels is put Connecting in frame and by securing member, reflecting plate is placed on reflecting plate rotating mechanism and is connected by securing member, reflecting plate rotating machine The interface that controls of structure is connected with the control interface of signal processor.Ellipsoid reflecting surface is placed in bottom frame and is connected by securing member.One Dimension Caustic method is placed in frame and is connected by securing member, the output interface of one-dimensional Caustic method and the Data Input Interface of signal processor Connect.The interface that controls of internal calibration combination is connected with the control interface of signal processor.Temperature sensor A data-interface, temperature pass Sensor B data interface is all connected with the temperature data acquisition interface of signal processor.The communication interface of signal processor and host computer Communication interface connect.Room temperature reference source and high temperature reference source are respectively placed in the two ends of mechanical fastener, and rotary electric machine is placed in frame. Absorbing material A is pasted onto the inner surface of metal structure A, and temperature sensor A is pasted onto the surface of absorbing material A.Absorbing material B Being pasted onto the inner surface of metal structure B, temperature sensor B is pasted onto the surface of absorbing material B, and heater is placed in metal structure B Outer surface and connected by securing member.Absorbing material C is pasted onto on structure-steel framing.

The reception antenna of one-dimensional Caustic method divides two rows to place, and unit interval is D₁, computing formula is shown in formula (1), and two rows receive sky Distance between centers of tracks is D₃, two row's reception antenna horizontal displacement distances D₂。D₁=2D₂=2D₃.The central distribution of reception antenna is reflecting with ellipsoid Center, face is initial point, f_iFor on the circle of radius.f_iFor the image space focal length of ellipsoid reflecting surface, i.e. ellipsoid reflecting surface center and one-dimensional focal plane The distance at battle array center.Radiometer, the computing formula that number is N, N of reception antenna are shown in formula (2), N round numbers.

$D_1=\frac{1.22{\mathrm{\λf}}_i}{D}---\left(1\right)$

Wherein: the wavelength that centered by λ, frequency is corresponding；f_iImage space focal length for ellipsoid reflecting surface；D is the diameter of ellipsoid reflecting surface.

$N=\frac{2L}{1.22{\mathrm{\λf}}_o}---\left(2\right)$

Wherein: the wavelength that centered by λ, frequency is corresponding；f_oFor thing side's focal length of ellipsoid reflecting surface, i.e. ellipsoid reflecting surface center to reflection Plate centre distance and reflecting plate center are to the minimum distance sum of monitor station center vertical line；L is observation swath.

For the signal flow of millimeter wave safety check imaging device, the electromagnetic wave of human body radiation is irradiated to reflecting plate, warp through media panels After reflecting plate, electromagnetic wave arrives ellipsoid reflecting surface, and after ellipsoid reflecting surface converges, electromagnetic wave focuses at one-dimensional Caustic method, electromagnetic wave Entering radiometer after being received antenna, radiometer changes into voltage signal electromagnetic wave, and signal processor gathers voltage signal and it Give image processing module, data are filtered by image processing module, image non-linear strengthen and image segmentation after by man-machine interaction Image is shown by module.

For the workflow of millimeter wave safety check imaging device, first carrying out internal calibration work, room temperature reference source turns to one-dimensional focal plane Battle array top, the temperature of absorbing material A is ambient temperature, temperature range :-10 DEG C-30 DEG C, and signal processor gathers one-dimensional focal plane One group of signal V of battle array_1iWith temperature information T₁, V_1iIt is an array, a length of N.After collection completes, high temperature reference source turns to one Dimension Caustic method top, the temperature of the absorbing material B of high temperature reference source is by heater control, and working range is 40 DEG C-60 DEG C, letter Number datatron gathers one group of signal V of one-dimensional Caustic method_2iWith temperature information T₂, V_2iIt is an array, a length of N.Collection completes Rear high temperature reference source is removed.Signal processor is T₁、V_1i、T₂, V_2iBe transferred to system control module, system control module according to V_1i、T₁、V_2i、T₂Obtain the Transfer Parameters a of each radiometer_iWith correction value b_i, and the computing formula of output apparent temperature, see formula (5). a_iComputing formula is shown in formula (3), b_iComputing formula is shown in formula (4).Then carrying out outer calibration work, signal processor controls one-dimensional focal plane Beyond Zhen, calibration is combined as target and gathers the voltage signal V of one group of radiometer output_oi, signal processor is signal V_oiIt is transferred to system Control module, system control module is calculated apparent temperature T_oi, T_oiBeing one group of data, data length is N.At T_oiIn find out Maximum of T_om, T_omDeduct T_oiObtaining one group of correction value, correction value gathers signal with each radiometer and is added

$a_i=\frac{T_2-T_1}{V_{2i}-V_{1i}}---\left(3\right)$

$b_i=\frac{V_{2i}{T}_1-V_{1i}{T}_2}{V_{2i}-V_{1i}}---\left(4\right)$

$T_{oi}=\frac{V_{oi}-b_i}{a_i}---\left(5\right)$

Parameter declaration:

T_oi: the apparent temperature that the i-th path radiation meter output voltage is corresponding, the sequence number of i: radiometer, value 1-N, lower same；

V_oi: the i-th path radiation meter output voltage；

a_i: the i-th path radiation meter Transfer Parameters；

b_i: the i-th path radiation meter correction value；

After completing calibration, tested personnel stand in monitor station, and operator send detection by human-computer interaction module to signal processor and refer to Order, signal processor receives instruction retroreflection plate rotating mechanism and sends downward scan instruction, and reflecting plate rotating mechanism drives reflecting plate It is scanned from the top down, and feedback reflector Board position information is to signal processor.Signal processor is adopted according to the image prestored Collection position, determines whether reflecting plate arrives image capture position, and when arriving image capture position, signal processor gathers one-dimensional Caustic method Output and be transmitted to system control module.Signal processor continues the positional information of detection reflecting plate, arrives next image acquisition During position, signal processor gathers the output of one-dimensional Caustic method, circulates according to this, until signal processor detects the position of reflecting plate Exceed image acquisition areas, i.e. complete an image frame grabber.Signal processor scans up to the transmission of reflecting plate rotating mechanism Instruction, sends frame data to system control module simultaneously and gathers end signal.System control module receives a frame data collection to be terminated After signal, data are filtered by startup image processing module, image non-linear strengthens, image segmentation, by man-machine after having processed Gray-scale map is shown by interactive module.Reflecting plate during being rotated up signal processor also according to the positional information collection figure of reflecting plate As data, the process that mode rotates down with reflecting plate.Until signal processor detects that the position of reflecting plate has exceeded image and adopted Ji Qu, i.e. completes an image frame grabber, and signal processor sends the instruction of scanning downwards to reflecting plate rotating mechanism, simultaneously to being System control module sends frame data and gathers end signal.After system control module receives a frame data collection end signal, start number Be filtered data according to processing module, image non-linear strengthens, image segmentation, by human-computer interaction module by gray scale after having processed Figure shows.Above-mentioned signal processor controls reflecting plate scanning, gathers one-dimensional Caustic method data, system control module, image procossing mould Block, human-computer interaction module process and show that the process of gray-scale map is repeated until that operator send stopping by human-computer interaction module After order, reflecting plate returns to original position, and signal processor stops data collection.The determination process of image capture position is: reflection Plate normal alignment visual field peak i.e. 2m eminence starts, and is spaced one position of half resolution cell storage, until reflecting plate normal reaches Position to monitor station is terminated.

The present invention uses ellipsoid reflecting surface as concentrating element, and one-dimensional Caustic method is as receiving parts, and it is right to realize with the rotation of reflecting plate The covering of visual field, completes the out of contact imaging to human body, generates two dimensional gray figure, it is possible to achieve to metal, nonmetal prohibited items Detection.This equipment uses passive type working system, radiationless, safety good.Internal calibration combination is used to carry out with outer calibration combination Real-time calibration, improves picture quality.Have compared with the equipment using di-lens that system loss is little, highly sensitive, reliability Height, low cost, the feature such as lightweight.

Accompanying drawing explanation

The composition schematic diagram of Fig. 1 a kind of mm-wave imaging rays safety detection apparatus；

One-dimensional Caustic method top view in Fig. 2 a mm-wave imaging rays safety detection apparatus；

One-dimensional Caustic method front view in Fig. 2 b mm-wave imaging rays safety detection apparatus；

Internal calibration combination top view composition schematic diagram in Fig. 3 one mm-wave imaging rays safety detection apparatus；

Room temperature reference source schematic side view in Fig. 4 a mm-wave imaging rays safety detection apparatus；

High temperature reference source schematic side view in Fig. 4 b mm-wave imaging rays safety detection apparatus；

Aobvious control subsystem composition schematic diagram in Fig. 5 one mm-wave imaging rays safety detection apparatus；

The most one-dimensional Caustic method 1-1-i. reception antenna, i takes 1-N；1-2-i. radiometer, i takes 1-N；2. ellipsoid reflecting surface 3. Reflecting plate 4. aobvious control subsystem 4-1 image processing module 4-2 system control module 4-3 human-computer interaction module 5. signal Datatron 6. internal calibration combination 6-1 rotary electric machine 6-2 mechanical fastener 6-3 room temperature reference source 6-4 high temperature reference source 6-5 absorbing material B 6-6 metal structure B 6-7 heater 6-8 temperature sensor B 6-9 absorbing material A 6-10 metal structure A 6-11 temperature sensor A 7. reflecting plate rotating mechanism 8. media panels 9. frame 10. is outer fixed Mark combination 10-1. structure-steel framing 10-2. absorbing material C 11 monitor station

Detailed description of the invention

A kind of passive millimeter imaging rays safety detection apparatus, including: one-dimensional Caustic method 1, reflecting plate 3, aobvious control subsystem 4, signal Datatron 5, internal calibration combination 6, reflecting plate rotating mechanism 7, media panels 8, frame 9 and monitor station 11, also include: ellipse Spherical reflector 2 and outer calibration combination 10.Described one-dimensional Caustic method 1, including: reception antenna 1-1-i, i take 1-N, and spoke Penetrate meter 1-2-i, i and take 1-N.Described internal calibration combination 6 includes: room temperature reference source 6-3, high temperature reference source 6-4, rotation electricity Machine 6-1, mechanical fastener 6-2.Described room temperature reference source includes absorbing material A6-9, metal structure A6-10, temperature sensing Device A6-11.Described high temperature reference source includes absorbing material B6-5, metal structure B6-6, heater 6-7, temperature sensor B6-8.Described outer calibration combination 10 includes structure-steel framing 10-1 and absorbing material C10-2.Described aobvious control subsystem 4, including Image processing module 4-1, system control module 4-2 and human-computer interaction module 4-3.

The function of image processing module 4-1 has been the filtering of view data, image non-linear strengthens and image is split；System control The function of molding block 4-2 has been and the communication of signal processor 5, it is achieved to reflecting plate rotating mechanism 7, internal calibration combination 6 Control and receive signal processor 5 loopback data；The function of human-computer interaction module 4-3 is to provide human-computer interaction interface, just Use in operator.

Outer calibration combination 10 is placed on the dead ahead of media panels 8 side.Monitor station 11 is placed in the structure-steel framing of outer calibration combination 10 Upper 10-1, the media panels 8 of imaging device is placed in frame 9 and is connected by securing member, and reflecting plate 3 is placed in reflecting plate and rotates Mechanism upper 7, is connected by securing member, and the interface that controls of reflecting plate rotating mechanism 7 is connected with the control interface of signal processor 5. Ellipsoid reflecting surface 2 is placed in bottom frame 9 and is connected by securing member.One-dimensional Caustic method 1 is placed in frame 9, is connected by securing member, The output interface of one-dimensional Caustic method 1 is connected with the Data Input Interface of signal processor 5.The control interface of internal calibration combination 6 and letter The control interface of number datatron 5 connects.Temperature sensor A 6-11 data-interface, temperature sensor B 6-8 data-interface all with The temperature data acquisition interface of signal processor 5 connects.The communication interface of signal processor 5 and the aobvious communication interface controlling subsystem 4 Connect.Room temperature reference source 6-3 and high temperature reference source 6-4 is respectively placed in the two ends of mechanical fastener 6-2, and rotary electric machine 6-1 is placed in On mechanical fastener 6-2.Absorbing material A 6-9 is pasted onto the inner surface of metal structure A 6-10, temperature sensor A 6-11 It is pasted onto the surface of absorbing material A 6-9.Absorbing material B 6-5 is pasted onto the inner surface of metal structure B 6-6, temperature sensor B 6-8 is pasted onto the surface of absorbing material B 6-5, and heater 6-7 is placed in the outer surface of metal structure B 6-6 by securing member even Connect.Absorbing material C 10-2 is pasted onto on structure-steel framing 10-1.

The reception antenna 1-1-i, i of one-dimensional Caustic method 1 take 1-N, and point two rows are placed, and unit interval is: D₁, two trestle column For D₃, two row's reception antenna horizontal displacement distances D₂。D₁=2D₂=2D₃.Reception antenna 1-1-i, i take 1-N, central distribution exist With ellipsoid reflecting surface 2 center as initial point, f_iFor on the circle of radius.f_iFor image space focal length, i.e. ellipsoid reflecting surface 2 center and one-dimensional Jiao The distance at face battle array 1 center.Radiometer 1-2-i, i take 1-N, and reception antenna 1-1-i, i take the computing formula of 1-N, N and see formula (2), N round numbers.

$D_1=\frac{1.22{\mathrm{\λf}}_i}{D}---\left(1\right)$

Wherein: the wavelength that centered by λ, frequency is corresponding；f_iImage space focal length for ellipsoid reflecting surface；D is the diameter of ellipsoid reflecting surface.

$N=\frac{2L}{1.22{\mathrm{\λf}}_o}---\left(2\right)$

Wherein: the wavelength that centered by λ, frequency is corresponding；f_oFor thing side's focal length of ellipsoid reflecting surface, i.e. ellipsoid reflecting surface 2 center to anti- Penetrate the minimum distance sum of plate 3 centre distance and reflecting plate 3 center to monitor station 11 center vertical line；L is observation swath.

For the signal flow of millimeter wave safety check imaging device, the electromagnetic wave of human body radiation is irradiated to reflecting plate 3 through media panels 8, After being reflected plate 3, electromagnetic wave arrives ellipsoid reflecting surface 2, and after ellipsoid reflecting surface 2 converges, electromagnetic wave is poly-at one-dimensional Caustic method 1 Jiao, electromagnetic wave is received antenna 1-1-i, and i takes 1-N, and the rear radiometer 1-2-i, i of entering takes 1-N, radiometer 1-2-i, i Taking 1-N, electromagnetic wave is changed into voltage signal, signal processor 5 gathers voltage signal and gives image processing module 4-1 it, Data are filtered by image processing module 4-1, image non-linear strengthen and image segmentation after by human-computer interaction module 4-3 by image Display.

Workflow for millimeter wave safety check imaging device: first carry out internal calibration work: internal calibration combines 6 room temperature reference sources 6-3 turns to one-dimensional Caustic method 1 top, and the temperature of absorbing material A6-9 is ambient temperature, operating temperature range :-10 DEG C-30 DEG C, signal processor 5 gathers one group of signal V of one-dimensional Caustic method 1_1iWith temperature information T₁, V_1iIt is an array, a length of N. After collection completes, high temperature reference source 6-4 turns to one-dimensional Caustic method 1 top, the temperature of the absorbing material B 6-5 of high temperature reference source 6-4 Degree is controlled by heater 6-7, and working range is 40 DEG C-60 DEG C, and signal processor 5 gathers one group of signal V of one-dimensional Caustic method_2i With temperature information T₂。V_2iIt is an array, a length of N.After collection completes, high temperature reference source 6-4 removes.Signal processor 5 T₁、V_1i、T₂, V_2iBeing transferred to system control module 4-6, system control module 4-6 is according to V_1i、T₁、V_2i、T₂Obtain each spoke Penetrate meter 1-2-i, i take 1-N, Transfer Parameters a_i, correction value b_iAnd output apparent temperature computing formula see formula (5).a_iMeter Calculate formula and see formula (3), b_iComputing formula is shown in formula (4).Then carrying out outer calibration work, signal processor 5 controls one-dimensional Caustic method Beyond 1, calibration combination 10 gathers the voltage signal V of one group of radiometer 1-2-i output for target_oi, 5 signal V of signal processor_oi It is transferred to system control module 4-6, system control module 4-6 and is calculated apparent temperature T_Oi,T_oiIt is one group of data, data length For N, at T_oiIn find out maximum of T_om, T_omDeduct T_oiObtaining one group of correction value, correction value gathers signal with each radiometer and is added

$a_i=\frac{T_2-T_1}{V_{2i}-V_{1i}}---\left(3\right)$

$b_i=\frac{V_{2i}{T}_1-V_{1i}{T}_2}{V_{2i}-V_{1i}}---\left(4\right)$

$T_{oi}=\frac{V_{oi}-b_i}{a_i}---\left(5\right)$

Parameter declaration:

T_oi: the apparent temperature that radiometer 1-2-i output voltage is corresponding, i: take 1-N, lower same；

V_oi: the output voltage of radiometer 1-2-i；

a_i: the Transfer Parameters of radiometer 1-2-i；

b_i: the correction value of radiometer 1-2-i.

After completing calibration, tested personnel stand in monitor station 11, and operator pass through human-computer interaction module 4-3 to signal processor 5 Sending detection instruction, signal processor is received 5 and is sent downward scan instruction to instruction retroreflection plate rotating mechanism 7, and reflecting plate rotates Mechanism 7 drives reflecting plate 3 to be scanned from the top down, and feedback reflector plate 3 positional information is to signal processor 5.Signal processing According to the image capture position prestored, machine 5 judges whether reflecting plate 3 arrives image capture position, when arriving image capture position Signal processor 5 gathers the output of one-dimensional Caustic method 1 and is transmitted to system control module 4-2.It is anti-that signal processor 5 continues detection Penetrating the positional information of plate 3, when arriving next image capture position, signal processor 5 gathers the output of one-dimensional Caustic method 1, depends on This circulation, until signal processor 5 detects that the position of reflecting plate 3 has exceeded image acquisition areas, i.e. completes a two field picture and adopts Collection, signal processor 5 sends the instruction scanned up to reflecting plate rotating mechanism 7, sends one to system control module 4-2 simultaneously Frame data gather end signal.After system control module 4-2 receives a frame data collection end signal, start image processing module Data are filtered by 4-1, image non-linear strengthens and image segmentation, by human-computer interaction module 4-3 by gray-scale map after having processed Display.Signal processor 5 is also according to the positional information collection view data of reflecting plate 3 during being rotated up for reflecting plate 3, square The process that method rotates down with reflecting plate 3.Until signal processor 5 detects that the position of reflecting plate 3 has exceeded image acquisition areas, I.e. completing an image frame grabber, signal processor 5 sends the instruction of scanning downwards to reflecting plate rotating mechanism 7, simultaneously to system Control module 4-2 sends frame data and gathers end signal.After system control module 4-2 receives a frame data collection end signal, Data are filtered by startup data processing module 4-1, image non-linear strengthens, image segmentation, by man-machine interaction after having processed Gray-scale map is shown by module 4-3.Above-mentioned signal processor 5 controls reflecting plate 3 and scans, gathers one-dimensional Caustic method 1 data, system Control module 4-2, image processing module 4-1, human-computer interaction module 4-3 process and show that the process of gray-scale map repeats, directly always Being sent to operator by human-computer interaction module 4-3 after ceasing and desisting order, reflecting plate 3 returns to original position, signal processor 5 Stop data collection.The determination process of image capture position is: reflecting plate 3 normal alignment visual field peak i.e. 2m eminence starts, It is spaced one position of half resolution cell storage, until the position that reflecting plate 3 normal reaches monitor station 11 is terminated.

Claims (1)

1. a passive millimeter imaging rays safety detection apparatus, including: one-dimensional Caustic method (1), reflecting plate (3), aobvious control subsystem (4), signal processor (5), internal calibration combination (6), reflecting plate rotating mechanism (7), media panels (8), frame (9) With monitor station (11), it is characterised in that also include: ellipsoid reflecting surface (2) and outer calibration combination (10)；Described one-dimensional focal plane Battle array (1), including: reception antenna (1-1-i) and radiometer (1-2-i)；Described internal calibration combination (6), including: room temperature Reference source (6-3), high temperature reference source (6-4), rotary electric machine (6-1) and mechanical fastener (6-2)；Described room temperature calibration Source (6-3), including: absorbing material A (6-9), metal structure A (6-10) and temperature sensor A (6-11)；Described High temperature reference source (6-4), including: absorbing material B (6-5), metal structure B (6-6), heater (6-7) and temperature pass Sensor B (6-8)；Described outer calibration combination (10), including: structure-steel framing (10-1) and absorbing material C (10-2)；Described Aobvious control subsystem (4), including image processing module (4-1), system control module (4-2) and human-computer interaction module (4-3)；

The function of image processing module (4-1) has been the filtering of view data, image non-linear strengthens and image is split；System The function of control module (4-2) has been and the communication of signal processor (5), it is achieved to reflecting plate rotating mechanism (7), interior The control of calibration combination (6) and the data of reception signal processor (5) loopback；The function of human-computer interaction module (4-3) is to carry For human-computer interaction interface, it is simple to operator use；

Outer calibration combination (10) is placed in the dead ahead of media panels (8) side；Monitor station (11) is placed in outer calibration combination (10) Structure-steel framing (10-1) on, it is upper and connected by securing member that media panels (8) is placed in frame (9), and reflecting plate (3) is placed in Reflecting plate rotating mechanism (7) is upper and is connected by securing member, the control interface of reflecting plate rotating mechanism (7) and signal processor (5) Control interface connect；Ellipsoid reflecting surface (2) is placed in frame (9) bottom and is connected by securing member；One-dimensional Caustic method (1) It is placed in frame (9) above and to be connected by securing member, the output interface of one-dimensional Caustic method (1) and the data of signal processor (5) Input interface connects；The control interface of internal calibration combination (6) is connected with the control interface of signal processor (5)；Temperature sensor A (6-11) data-interface, temperature sensor B (6-8) data-interface all temperature data acquisitions with signal processor (5) connect Mouth connects；The communication interface of signal processor (5) is connected with the communication interface of host computer；Room temperature reference source (6-3) and high temperature Reference source (6-4) is respectively placed in the two ends of mechanical fastener (6-2), and rotary electric machine (6-1) is placed in frame (9)；Inhale ripple Materials A (6-9) is pasted onto the inner surface of metal structure A (6-10), and temperature sensor A (6-11) is pasted onto absorbing material A (6-9) surface；Absorbing material B (6-5) is pasted onto the inner surface of metal structure B (6-6), temperature sensor B (6-8) Being pasted onto the surface of absorbing material B (6-5), heater (6-7) is placed in the outer surface of metal structure B (6-6) and by fastening Part connects；Absorbing material C (10-2) is pasted onto on structure-steel framing (10-1)；

The reception antenna (1-1-i) of one-dimensional Caustic method (1) point two rows are placed, and unit interval is D₁, computing formula is shown in formula (1), Two row's reception antenna (1-1-i) spacing are D₃, two row's reception antenna (1-1-i) horizontal displacement distances D₂；D₁=2D₂=2D₃；Connect Receive antenna (1-1-i) central distribution with ellipsoid reflecting surface (2) center as initial point, f_iFor on the circle of radius；f_iAnti-for ellipsoid Penetrate the distance of the image space focal length in face (2), i.e. ellipsoid reflecting surface (2) center and one-dimensional Caustic method (1) center；Radiometer (1-2-i), The computing formula that number is N, N of reception antenna (1-1-i) is shown in formula (2), N round numbers；

$D_1=\frac{1.22{\mathrm{\λf}}_i}{D}---\left(1\right)$

Wherein: the wavelength that centered by λ, frequency is corresponding；f_iImage space focal length for ellipsoid reflecting surface (2)；D is ellipsoid reflecting surface (2) Diameter；

$N=\frac{2L}{1.22{\mathrm{\λf}}_o}---\left(2\right)$

Wherein: the wavelength that centered by λ, frequency is corresponding；f_oFor thing side's focal length of ellipsoid reflecting surface (2), i.e. ellipsoid reflecting surface (2) Center is to the minimum distance sum of reflecting plate (3) centre distance with reflecting plate (3) center to monitor station (11) center vertical line；L For observation swath；

For the signal flow of millimeter wave safety check imaging device, the electromagnetic wave of human body radiation is irradiated to reflection through media panels (8) Plate (3), is reflected plate (3) electromagnetic wave afterwards and arrives ellipsoid reflecting surface (2), and after ellipsoid reflecting surface (2) converges, electromagnetic wave exists One-dimensional Caustic method (1) place focuses on, and electromagnetic wave is received antenna (1-1-i) and enters radiometer (1-2-i), radiometer (1-2-i) afterwards Electromagnetic wave is changed into voltage signal, and signal processor (5) gathers voltage signal and gives image processing module (4-1) it, Data are filtered by image processing module (4-1), image non-linear strengthen and image segmentation after by human-computer interaction module (4-3) Image is shown；

For the workflow of millimeter wave safety check imaging device, first carrying out internal calibration work, room temperature reference source (6-3) turns to One-dimensional Caustic method (1) top, the temperature of absorbing material A (6-9) is ambient temperature, temperature range :-10 DEG C-30 DEG C, letter Number datatron (5) gathers one group of signal V of one-dimensional Caustic method (1)_1iWith temperature information T₁, V_1iIt is an array, a length of N； After collection completes, high temperature reference source (6-4) turns to one-dimensional Caustic method (1) top, the absorbing material of high temperature reference source (6-4) The temperature of B (6-5) is controlled by heater (6-7), and working range is 40 DEG C-60 DEG C, and signal processor (5) gathers one-dimensional One group of signal V of Caustic method (1)_2iWith temperature information T₂, V_2iIt is an array, a length of N；Collection complete after high temperature reference source (6-4) remove；Signal processor (5) is T₁、V_1i、T₂, V_2iBeing transferred to system control module (4-2), system controls mould Block (4-2) is according to V_1i、T₁、V_2i、T₂Obtain the Transfer Parameters a of each radiometer (1-2-i)_iWith correction value b_i, and output apparent The computing formula of temperature, is shown in formula (5)；a_iComputing formula is shown in formula (3), b_iComputing formula is shown in formula (4)；Then outer calibration work is carried out Making, it is that target gathers one group of radiometer (1-2-i) that signal processor (5) controls to calibrate combination (10) beyond one-dimensional Caustic method (1) The voltage signal V of output_oi, signal processor (5) is signal V_oiIt is transferred to system control module (4-2), system control module (4-2) apparent temperature T it is calculated_oi, T_oiBeing one group of data, data length is N；At T_oiIn find out maximum of T_om, T_omSubtract Remove T_oiObtaining one group of correction value, correction value gathers signal with each radiometer (1-2-i) and is added

$a_i=\frac{T_2-T_1}{V_{2_i}-V_{1i}}---\left(3\right)$

$b_i=\frac{V_{2_i}{T}_1-V_{1_i}{T}_2}{V_{2_i}-V_{1_i}}---\left(4\right)$

$T_{oi}=\frac{V_{oi}-b_i}{a_i}---\left(5\right)$

Parameter declaration:

T_oi: the apparent temperature that the i-th path radiation meter (1-2-i) output voltage is corresponding, the sequence number of i: radiometer (1-2-i), Value 1-N, lower same；

V_oi: the i-th path radiation meter (1-2-i) output voltage；

a_i: the i-th path radiation meter (1-2-i) Transfer Parameters；

b_i: the i-th path radiation meter (1-2-i) correction value；

After completing calibration, tested personnel stand in monitor station (11), and operator pass through human-computer interaction module (4-3) at signal Reason machine (5) sends detection instruction, and signal processor (5) receives instruction retroreflection plate rotating mechanism (7) and sends scanning downwards Instruction, reflecting plate rotating mechanism (7) drives reflecting plate (3) to be scanned from the top down, and feedback reflector plate (3) position letter Breath is to signal processor (5)；Signal processor (5), according to the image capture position prestored, determines that reflecting plate (3) is No arrival image capture position, when arriving image capture position, signal processor (5) gathers the output of one-dimensional Caustic method (1) also It is transmitted to system control module (4-2)；Signal processor (5) continues the positional information of detection reflecting plate (3), arrives next During individual image capture position, signal processor (5) gathers the output of one-dimensional Caustic method (1), circulates according to this, until at signal Reason machine (5) detects that the position of reflecting plate (3) has exceeded image acquisition areas, i.e. completes an image frame grabber；At signal Reason machine (5) sends the instruction scanned up to reflecting plate rotating mechanism (7), sends one to system control module (4-2) simultaneously Frame data gather end signal；After system control module (4-2) receives a frame data collection end signal, start image procossing mould Data are filtered by block (4-1), image non-linear strengthens, image segmentation, by human-computer interaction module (4-3) after having processed Gray-scale map is shown；Reflecting plate (3) during being rotated up signal processor (5) also according to reflecting plate (3) position believe Breath gathers view data, the process that the same reflecting plate of mode (3) rotates down；Until signal processor (5) detects reflecting plate (3) position has exceeded image acquisition areas, i.e. completes an image frame grabber, and signal processor (5) rotates to reflecting plate Mechanism (7) sends the instruction of scanning downwards, sends frame data to system control module (4-2) simultaneously and gathers end signal； After system control module (4-2) receives a frame data collection end signal, start data processing module and data are filtered, scheme As non-linear enhancing, image segmentation, by human-computer interaction module (4-3), gray-scale map is shown after having processed；Above-mentioned signal processing Machine (5) controls reflecting plate (3) and scans, gathers one-dimensional Caustic method (1) data, system control module (4-2), image procossing Module (4-1), human-computer interaction module (4-3) process and to show that the process of gray-scale map is repeated until that operator pass through man-machine Interactive module (4-3) sends after ceasing and desisting order, and reflecting plate (3) returns to original position, and signal processor (5) stops gathering number According to；The determination process of image capture position is: reflecting plate (3) normal alignment visual field peak i.e. 2m eminence starts, interval half One position of individual resolution cell storage, until the position that reflecting plate (3) normal reaches monitor station (11) is terminated.