CN104914478A - Terahertz human body safety check system and method - Google Patents
Terahertz human body safety check system and method Download PDFInfo
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- CN104914478A CN104914478A CN201510376894.9A CN201510376894A CN104914478A CN 104914478 A CN104914478 A CN 104914478A CN 201510376894 A CN201510376894 A CN 201510376894A CN 104914478 A CN104914478 A CN 104914478A
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Abstract
The invention discloses a terahertz human body safety check system and method. The safety check system includes a terahertz human body safety check scanning mechanism, a control circuit board connected to a terahertz detector in the terahertz human body safety check scanning mechanism, an industrial control computer connected with the control circuit board, and an image display connected with the industrial control computer. A rack of the terahertz human body safety check scanning mechanism is provided with a rolling cylinder type multi-face reflecting rotary mirror and a rotation driving mechanism driving the rolling cylinder type multi-face reflecting rotary mirror to rotate and a horizontal swinging driving device driving the rolling cylinder type multi-face reflecting rotary mirror to swing horizontally. An upper concave mirror and a lower concave mirror are disposed in the tilt upward side and the front tilt downward side of the rolling cylinder type multi-face reflecting rotary mirror and both of the upper concave mirror and the lower concave mirror face towards the rolling cylinder type multi-face reflecting rotary mirror. The terahertz human body safety check system and method have advantages of high scanning speed, low vibration and noise, simple mechanical structure, low manufacture cost and the like.
Description
Technical field
The invention belongs to Terahertz applied technical field, particularly relate to a kind of Terahertz human body security check system and method.
Background technology
Terahertz is the electromagnetic wave of frequency at 0.1THz-10THz, and wave band is between infrared and millimeter wave, is in important position in electromagnetic wave spectrum.From physics, THz wave is in the zone of transition of electronics to photonics; From frequency domain, the important frequencies scope such as frequency of the characteristic frequency of plasma wave, the organic and rotation and vibration frequency of biomacromolecule, the cosmic space photon of about 50% in the frequency coverage of THz wave semiconductor; From application point, THz wave has bandwidth, energy is little, coherence is strong, measure signal to noise ratio (S/N ratio) high, is suitable for the various fields such as material characteristics sign, high-resolution imaging, medical diagnosis, safety check, information communication, radar detection, air and environment measuring.Therefore, THz wave has important application prospect in national economy and national security etc.
Terahertz has very strong penetrability, can penetrate clothing easily, and human body self can produce this electromagnetic wave and to external radiation, therefore, Terahertz human body safety check instrument is developed.Terahertz human body safety check instrument is the THz wave sent by passive reception human body, after treated conversion, forms the two-dimentional Terahertz " snapshot " of human body.When being concealed with article in thing that people wears the clothes, absorb and stopped the normal trace of THz wave, make to produce intensity contrast between the position at corresponding article place in " snapshot " and human body background, thus find out the existence of article, and show the shape of article and the position at its place on a display screen.
Terahertz human body safety check instrument is compared with conventional body's safety check means, has four characteristics:
(1) safer.Traditional safety check instrument generally adopts X ray initiatively emission detection, and Terahertz safety check instrument is then the electromagnetic wave that passive acceptance sends from human body self, and equipment itself does not exist any ionization or electromagnetic radiation, is perfectly safe to detected personnel.
(2) more reliable.Traditional safety check instrument is mainly used in metallics detection, and Terahertz safety check instrument not only can detect metallics, can also detect the nonmetallic substance that the person carries, as pottery, powder, liquid, colloid etc.
(3) more civilized.Equipment Inspection mode is contactless inspection, and tested personnel need not undress, and testing result does not show any physical trait details, and adequately protect tested personnel's individual privacy.
Fig. 1 shows physical construction and the scanning theory of existing a kind of Terahertz human body safety check instrument: comprise pendulum mirror 11, concave mirror 12, lead screw motor 14, screw mandrel 15, swing mirror bracket 16, luffing mechanism 17 etc.The THz wave that human body 10 sends, being reflexed to its oblique upper by the pendulum mirror 11 of the one side circle swung has on the concave mirror 12 of optically focused effect, then terahertz detector 13 (having 1-3) institute's perception of concave mirror 12 focal position is located at, form the capable pixel of 1-3, pendulum mirror 11 drives generation luffing by lead screw motor 14, completes the scanning of the top-down whole height of human body; Large number of rows pixel stacks up, and forms complete scan image.
In order to improve sweep velocity, this Terahertz human body safety check instrument physical construction has had a kind of pattern of upgrading, be mirrored by physical construction and be copied into identical two covers up and down, be responsible for separately above the waist and the scanning of the lower part of the body, then upper and lower scanning result is superimposed as a width complete image.Due to all doubling with number of optical devices of all parts, comprising motor and screw mandrel and driver is also all independently upper and lower two covers, therefore complicated in mechanical structure, with high costs.In addition, pendulum mirror adopts reciprocating swing form, feature there is acceleration-deceleration to zero, and then heterodromous process, acceleration of motion is large, if mechanism can not do enough light and handy, inertia is large, vibration is large, and speed also cannot improve, and pendulum scarnning mirror speed obviously strengthens the problems such as even motor overload warning once raising there will be leading screw noise.
And the formation method of existing Terahertz human body safety check instrument is next direct stacking pixel of lining by line scan, therefore it is large to there is anamorphose, image blur, the problem that resolution is low.
In addition, current terahertz detector is in continuous working after a period of time, its output voltage there will be drift, this needs suspend body scans and guarantee that scanning area does not detect thing, under being switched to calibration mode, the soft-key button clicking calibration carries out manual calibration, just can work on after calibration.The interval of calibration of this calibrating mode is long, cannot solve the situation that detector drift occurs in the process of single pass.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of sweep velocity high, reduce vibration and noise, physical construction is simple, the Terahertz human body security check system of low cost of manufacture, to overcome the deficiency that prior art exists.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of Terahertz human body security check system, it includes: Terahertz human body safety check scanning mechanism, the control circuit board be connected with the terahertz detector in Terahertz human body safety check scanning mechanism, the industrial computer be connected with control circuit board again and the image display be connected with industrial computer again, described Terahertz human body safety check scanning mechanism comprises frame, upper recess surface mirror and concave surface mirror, the focal position of described upper recess surface mirror and described concave surface mirror is respectively equipped with terahertz detector, it is characterized in that: the rotary drive mechanism that described frame is provided with drum-type multiaspect reflecting rotating mirror and drives described drum-type multiaspect reflecting rotating mirror to rotate and the horizontal hunting drive unit driving described drum-type multiaspect reflecting rotating mirror horizontal hunting, described upper recess surface mirror and described concave surface mirror lay respectively at the front oblique upper of described drum-type multiaspect reflecting rotating mirror and front oblique below and all towards described drum-type multiaspect reflecting rotating mirror, described rotary drive mechanism is also connected with described control circuit board with described horizontal hunting driving mechanism.
Described industrial computer is also connected with alarm.
Described drum-type multiaspect reflecting rotating mirror is formed by mirror holder with around the plane mirror that the polylith be arranged on mirror holder side face is end to end.
In a preferred embodiment of the invention, described drum-type multiaspect reflecting rotating mirror is drum-type six reflecting rotating mirrors, the plane mirror that namely on mirror holder side face, installation six pieces is end to end.
In the specific embodiment of the present invention, described horizontal hunting drive unit is by cage horizontal pendulum moving frame, the swing electrical mechanisms driving cage horizontal pendulum moving frame to swing by toggle becomes, and described drum-type multiaspect reflecting rotating mirror is located in described cage horizontal pendulum moving frame.
In the specific embodiment of the present invention, the back shaft be located in mirror holder is fixed with in the middle part of described cage horizontal pendulum moving frame, described rotating driving device is be fixed on rotation motor back shaft being positioned at mirror holder inside, and described rotation motor drives described mirror holder to rotate centered by back shaft.
Described frame front is provided with upper and lower crossbeam, and the anterior upper and lower end of described cage horizontal pendulum moving frame is respectively provided with and is arranged on axle portion on upper and lower crossbeam to form the oscillation centre of cage horizontal pendulum moving frame.
Described rotation motor and described swing motor are all connected with angular transducer.Realize reconstructing scan image by the position coordinates of the pendulum angle and the anglec of rotation and image slices vegetarian refreshments of measuring drum-type multiaspect reflecting rotating mirror like this, described angular transducer is also connected with described control circuit board.Described angular transducer is scrambler.
Adopt technique scheme, Terahertz human body security check system of the present invention have sweep velocity high, reduce vibration and noise, the advantages such as physical construction is simple, low cost of manufacture.
In addition, the present invention also provides a kind of safety inspection method using above-mentioned Terahertz human body security check system, it is characterized in that:
Control circuit board index drum formula multiaspect reflecting rotating mirror rotates in centre position, human body front and level swings back and forth, upper recess surface mirror and concave surface mirror receive the THz wave of the upper part of the body that the reflection of described drum-type multiaspect reflecting rotating mirror comes and the lower part of the body respectively and focus on to terahertz detector, and described control circuit board Real-time Collection Terahertz visits the anglec of rotation of terahertz wave signal and described drum-type multiaspect reflecting rotating mirror, pendulum angle be transferred to industrial computer;
Industrial computer sets up each group of anglec of rotation of drum-type multiaspect reflecting rotating mirror and the one-to-one relationship of pendulum angle and each pixel coordinate of scan image;
The terahertz signal detected corresponding to each group of anglec of rotation and pendulum angle is changed into image intensity value and is filled into each pixel of respective coordinates point by point thus forms complete scanned image by industrial computer.
The rotational speed of described drum-type multiaspect reflecting rotating mirror and the relative speed of hunting frequency adjustable, preferably often swing back and forth once rotate 27 circle.
In order to the output voltage offset problem of terahertz detector can be overcome, in human body safety check method of the present invention, every block plane mirror of described drum-type multiaspect reflecting rotating mirror is also allowed to complete after to body scans, also the region outside human body is scanned, control terahertz detection calibrate according to terahertz wave signal cannot be received in the region of terahertz detector outside human body.Due to calibration frequency be every rotation sweep human body once, be equivalent to complete in real time in single pass process, and do not need the working time outside occupying volume.
Adopt above-mentioned safety inspection method, the present invention have image clear, be out of shape little and that resolution is high advantage, and achieving run-down with regard to carrying out the calibration of a terahertz detector in real time, not needing the working time outside occupying volume, ensure that human body safety check can long-time continuous carry out.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail:
Fig. 1 is the structural representation of the Terahertz human body safety check instrument of prior art;
Fig. 2 is system architecture schematic diagram of the present invention;
Fig. 3 is the structural representation of Terahertz human body safety check scanning mechanism;
Fig. 4 is the structural representation of drum-type multiaspect reflecting rotating mirror, and its inside is provided with rotating driving device;
Fig. 5 is the structural representation of horizontal hunting drive unit.
Embodiment
As shown in Figure 2, Terahertz human body security check system of the present invention, comprises Terahertz human body safety check scanning mechanism 01, control circuit board 02, industrial computer 03, image display 04 and alarm 05.
Wherein, as shown in Fig. 3 and Fig. 3, Terahertz human body safety check scanning mechanism 01 is made up of frame 100, drum-type multiaspect reflecting rotating mirror 200, upper recess surface mirror 301, concave surface mirror 302, terahertz detector, rotary drive mechanism 400, horizontal hunting drive unit 500.
Wherein, frame 100 by four discrete growth rectangular frames column 101, be located at top ceiling 102 and be located at bottom base station 103 form.
In the present embodiment, drum-type multiaspect reflecting rotating mirror 200 is drum-type six reflecting rotating mirrors, level is arranged on the middle part of frame 100, forms by hexahedral mirror holder 201 with around being arranged on six pieces of end to end plane mirrors 202 in mirror holder 201 circumference six planes.Rotary drive mechanism 400 is positioned at mirror holder 201.
Shown in Fig. 3 composition graphs 5, horizontal hunting drive unit 500 is made up of swing motor 501, cage horizontal pendulum moving frame 502, toggle 503.Toggle 503 is made up of rotating disk 531 and connecting rod 532.
Back up pad 511 is fixed with between two root posts at frame 100 rear portion, back up pad 511 is fixed with backing plate 512, be connected with the end plate 513 vertical with backing plate 512 in the lower end of backing plate 512, swing motor 501 is fixed on below end plate 513, and its output shaft is upward through end plate 513.The top of backing plate 512 is fixed with clutch shaft bearing seat 514, the first rotating shaft is provided with in this bearing seat 514, the upper end of the first rotating shaft is connected to the center of rotating disk 531, and lower end connects the output shaft of swing motor 501 by shaft coupling, and swing motor 501 is also provided with the first scrambler 517.One end hinge of connecting rod 532 is at the off-centered card edge of rotating disk 531.
Again as shown in Figure 3, cage horizontal pendulum moving frame 502 entirety is diamond structure, has the end frame 521 of upper and lower rhombus, is connected to many support bars 522 between upper and lower end frame 521 and middle part connects many support bars 522 and the fixed frame of front opening forms 523.
Respectively up and down between two root posts of frame 100 front portion fix a crossbeam 520.The front end of the upper and lower end frame of cage horizontal pendulum moving frame 502 respectively has axle portion 524, be hubbed on the center on upper and lower crossbeam respectively and form the oscillation centre of cage horizontal pendulum moving frame 502, the other end hinge of connecting rod 532 is in the side margins of lower end frame 521.
Again as shown in Figure 4, be fixed with the back shaft 203 of horizontally set between in the middle part of the supported on both sides bar 522 of cage horizontal pendulum moving frame 502 by fixture block 5221, the mirror holder 201 of drum-type six reflecting rotating mirrors is arranged on back shaft 203, can roll around back shaft 203.
Rotary drive mechanism 400 is arranged on the inside of mirror holder 201, rolls around back shaft 203 for driving mirror holder 201.Rotary drive mechanism 400 comprises base 401, the rotating shaft of rotation motor 402, second bearing seat 403, second, the second scrambler 406, driving gear 407 and follower gear 408.Wherein, rotation motor 402 and the second bearing seat 403 are fixed in base 401, second rotating shaft 404 is arranged in the second bearing seat 403, its one end is connected with the output shaft of rotation with motor 402 front end by shaft coupling, the other end installs driving gear 407, and follower gear 408 is fixed on one of them end face inside of mirror holder 201 and engages with driving gear 407.Second scrambler 406 is arranged on the output shaft of rotation motor 402 rear end.Like this, by the driving of rotation with stepper motor 402, drum-type six reflecting rotating mirrors can be made to roll around back shaft 203.
Again as shown in Figure 3, upper recess surface mirror 301 to be fixed on ceiling 102 and to be positioned at the front oblique upper of drum-type six reflecting rotating mirrors, and concave surface mirror 302 to be fixed on base station 103 and to be positioned at the front oblique below of drum-type six reflecting rotating mirrors.Terahertz detector has two, wherein goes up terahertz detector 3031 and to be fixed on ceiling 102 and the focal position being positioned at upper recess surface mirror 301, and lower terahertz detector 3032 to be fixed on base station 103 and to be positioned at the focal position of concave surface mirror 302.
The anterior position that base station 103 is positioned at frame 100 is also provided with the platform 104 of standing for tested personnel.
Above-mentioned swing motor 501 and rotation motor 402 preferably adopt stepper motor.The Terahertz human body safety check scanning mechanism adopted in the present invention, it has following feature compared with existing Terahertz human body safety check scanning mechanism:
The scanning of upper half of human body and the lower part of the body is solved with drum-type six reflecting rotating mirrors of middle traverse, instead of the upper lower part of the body scanning of human body was responsible for by picture with the duplicate light path system of upper and lower two cover in the past, the feature of width is greater than according to human height's size, and the feature that drum-type six reflecting rotating mirror rolling rotational scan range are large, original single mirror left and right reciprocally swinging scanning many minute surfaces become around its axle center rotation are scanned up and down, like this, many mirrors are become from single mirror, to-and-fro movement becomes continuous rotary motion, thus reach efficiency and significantly improve with smooth running without impact, be easy to the object raised speed, and noise is low.
The circumferential each face of hexahedral mirror holder 201 is provided with plane mirror, and by rotation, with motor head roll formula six reflecting rotating mirrors, around axle center, rolling rotates.The effect of the concave surface mirror of drum-type six reflecting rotating mirror front oblique upper upper recess surface mirrors and position, front lower place is the human body THz wave receiving each mirror-reflection, focus on the terahertz detector at respective concave mirror focus place respectively, upper recess surface mirror and concave surface mirror are responsible for above the waist and the light of the lower part of the body separately, form the scanning of a row human body full-height.Drum-type six reflecting rotating mirrors, from left swing to the right side, just complete the scanning of human body Width, and next time, scanning then put a left side again from the right side, completed the scanning of lower next human body Width; The swing of drum-type six reflecting rotating mirrors is reached with motor driving crank linkage assembly by swinging; Higher than the efficiency of the straight reciprocating motion of screw mandrel, speed is fast, and structure is simple, and cost is low.
Again as shown in Figure 2, rotation motor 402 in Terahertz human body safety check scanning mechanism 01, swing motor, upper terahertz detector 3031, lower terahertz detector 3032, first scrambler 517, second are compiled scrambler 406 and are all connected with control circuit board 02, controller circuit board 02 connects industrial computer 03 again, and image display 04 is also connected with industrial computer 03 with alarm 05.
Wherein, the function of control circuit board 02 controls electric rotating machine 402 and swing motor 501 to carry out head roll formula multiaspect reflecting rotating mirror 200 and rotate and swung body scans, gather the terahertz wave signal data of terahertz detector and the angle-data of scrambler and transmit data to industrial computer, the function of industrial computer 03 is rebuild image, identifies dangerous goods and report to the police by image procossing.
Therefore, as can be seen from foregoing detailed description, Terahertz human body security check system of the present invention have sweep velocity high, reduce vibration and noise, the advantages such as physical construction is simple, low cost of manufacture.
In addition, the present invention uses the process of the safety inspection method of above-mentioned Terahertz human body security check system to be:
Control circuit board index drum formula multiaspect reflecting rotating mirror rotates in centre position, human body front and level swings back and forth, upper recess surface mirror and concave surface mirror receive the THz wave of the upper part of the body that the reflection of described drum-type multiaspect reflecting rotating mirror comes and the lower part of the body respectively and focus on to terahertz detector, and described control circuit board Real-time Collection Terahertz visits the anglec of rotation of terahertz wave signal and described drum-type multiaspect reflecting rotating mirror, pendulum angle be transferred to industrial computer;
Industrial computer sets up each group of anglec of rotation of drum-type multiaspect reflecting rotating mirror and the one-to-one relationship of pendulum angle and each pixel coordinate of scan image;
The terahertz signal detected corresponding to each group of anglec of rotation and pendulum angle is changed into image intensity value and is filled into each pixel of respective coordinates point by point thus forms complete scanned image by industrial computer.
The relative speed of the preferred rotational speed of drum-type multiaspect reflecting rotating mirror and hunting frequency is adjustable, preferably often swings back and forth and once rotates 27 circles.
In order to the output voltage offset problem of terahertz detector can be overcome, gather in human body safety check method of the present invention, every block plane mirror of described drum-type multiaspect reflecting rotating mirror is allowed to complete after to body scans, also the region outside human body is scanned, control terahertz detection calibrate according to terahertz wave signal cannot be received in the region of terahertz detector outside human body.
For above-mentioned drum-type six reflecting rotating mirrors, each plane mirror run-down is rotation 60 degree, wherein human body can be scanned within the scope of 0-26 °, analyzing spot is in imaging region interscan, receive the terahertz wave signal that human body sends, can utilize and collect terahertz wave signal and carry out image reconstruction.When plane mirror rotates over 26 °, analyzing spot moves to outside imaging region thereupon, and arrive a region, the THz wave of human-body emitting can well be blocked due to the shielding action of Scan Architecture in this region, terahertz detector cannot detect terahertz wave signal, thus controls the drift being used for calibration detectors self.
Because calibration frequency often rotates one piece of plane reflection scarnning mirror human body once, be equivalent to complete in real time in single pass process, and do not need the working time outside occupying volume.
Adopt above-mentioned safety inspection method, the present invention have image clear, be out of shape little and that resolution is high advantage, and achieving run-down with regard to carrying out the calibration of a terahertz detector in real time, not needing the working time outside occupying volume, ensure that human body safety check can long-time continuous carry out.
Claims (10)
1. a Terahertz human body security check system, it includes: Terahertz human body safety check scanning mechanism, with the control circuit board of the terahertz detector in Terahertz human body safety check scanning mechanism, the industrial computer be connected with control circuit board again and the image display that is connected with industrial computer again; Described Terahertz human body safety check scanning mechanism comprises frame, upper recess surface mirror and concave surface mirror, and the focal position of described upper recess surface mirror and described concave surface mirror is respectively equipped with terahertz detector, it is characterized in that:
The rotary drive mechanism that described frame is provided with drum-type multiaspect reflecting rotating mirror and drives described drum-type multiaspect reflecting rotating mirror to rotate and the horizontal hunting drive unit driving described drum-type multiaspect reflecting rotating mirror horizontal hunting, described upper recess surface mirror and described concave surface mirror lay respectively at the front oblique upper of described drum-type multiaspect reflecting rotating mirror and front oblique below and all towards described drum-type multiaspect reflecting rotating mirror, described rotary drive mechanism is also connected with described control circuit board with described horizontal hunting driving mechanism.
2. Terahertz human body security check system according to claim 1, is characterized in that: described industrial computer is also connected with alarm.
3. Terahertz human body security check system according to claim 1, is characterized in that: described drum-type multiaspect reflecting rotating mirror is formed by mirror holder with around the plane mirror that the polylith be arranged on mirror holder side face is end to end.
4. Terahertz human body security check system according to claim 3, is characterized in that: described drum-type multiaspect reflecting rotating mirror is drum-type six reflecting rotating mirrors.
5. Terahertz human body security check system according to claim 3, it is characterized in that: described horizontal hunting drive unit is by cage horizontal pendulum moving frame, the swing electrical mechanisms driving cage horizontal pendulum moving frame to swing by toggle becomes, described drum-type multiaspect reflecting rotating mirror is located in described cage horizontal pendulum moving frame, and described swing motor connects described control circuit board.
6. Terahertz human body security check system according to claim 5, it is characterized in that: in the middle part of described cage horizontal pendulum moving frame, be fixed with the back shaft be located in mirror holder, described rotating driving device is be fixed on rotation motor back shaft being positioned at mirror holder inside, described rotation motor drives mirror holder to rotate centered by back shaft, and described rotation motor connects described control circuit board.
7. Terahertz human body security check system according to claim 6, is characterized in that: described rotation motor and described swing motor are all connected with angular transducer, and described angular transducer all connects described control circuit board.
8. a Terahertz human body safety check method, is characterized in that: use Terahertz human body security check system as claimed in claim 1, and its safety check process is:
Control circuit board index drum formula multiaspect reflecting rotating mirror rotates in centre position, human body front and level swings back and forth, upper recess surface mirror and concave surface mirror receive the THz wave of the upper part of the body that the reflection of described drum-type multiaspect reflecting rotating mirror comes and the lower part of the body respectively and focus on to terahertz detector, and described control circuit board Real-time Collection Terahertz visits the anglec of rotation of terahertz wave signal and described drum-type multiaspect reflecting rotating mirror, pendulum angle be transferred to industrial computer;
Industrial computer sets up each group of anglec of rotation of drum-type multiaspect reflecting rotating mirror and the one-to-one relationship of pendulum angle and each pixel coordinate of scan image;
The terahertz signal detected corresponding to each group of anglec of rotation and pendulum angle is changed into image intensity value and is filled into each pixel of respective coordinates point by point thus forms complete scanned image by industrial computer.
9. Terahertz human body safety check method according to claim 8, is characterized in that: often swinging back and forth of described drum-type multiaspect reflecting rotating mirror once rotates 27 circles.
10. Terahertz human body safety check method according to claim 8, it is characterized in that: allow every block plane mirror of described drum-type multiaspect reflecting rotating mirror complete after to body scans, also the region outside human body is scanned, control terahertz detection calibrate according to terahertz wave signal cannot be received in the region of terahertz detector outside human body.
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| CN105425310A (en) * | 2015-10-27 | 2016-03-23 | 中船重工（西安）东仪矿用安全装备有限公司 | Safety check system and safety check method used for common occasions |
| CN109521492A (en) * | 2018-12-29 | 2019-03-26 | 同方威视技术股份有限公司 | Millimeter wave/THz wave safety check instrument and its reflecting plate scanning driving device |
| CN109633776A (en) * | 2018-12-29 | 2019-04-16 | 同方威视技术股份有限公司 | Millimeter wave/THz wave imaging device and human body or article detection method |
| CN109856696A (en) * | 2018-12-29 | 2019-06-07 | 同方威视技术股份有限公司 | Millimeter wave/THz wave imaging device and human body or article detection method |
| CN109870740A (en) * | 2018-12-29 | 2019-06-11 | 清华大学 | Millimeter wave/THz wave imaging device and its reflecting plate regulating device |
| CN111352170A (en) * | 2020-03-09 | 2020-06-30 | 浙江云特森科技有限公司 | Sectional scanning method |
| WO2020134333A1 (en) * | 2018-12-29 | 2020-07-02 | 同方威视技术股份有限公司 | Millimeter wave/terahertz wave imaging equipment and human or object detecting method |
| CN111781650A (en) * | 2020-05-29 | 2020-10-16 | 欧必翼太赫兹科技(北京)有限公司 | Terahertz security inspection imaging device |
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