CN114185037A

CN114185037A - Real-time imaging system and human body security inspection device

Info

Publication number: CN114185037A
Application number: CN202111404469.8A
Authority: CN
Inventors: 赵自然; 于洋; 乔灵博; 陈志强; 李元景; 王迎新
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-03-15

Abstract

The application relates to a real-time imaging system and a human body security inspection device. The real-time imaging system includes: the beam transceiver module is used for generating, transmitting and receiving beams and outputting echo data of the received beams. The optical assembly is used to converge, propagate, and reflect the emitted and reflected beams. The scanning device is used for adjusting different positions of the measured target irradiated by the beams. The data acquisition and processing system is respectively connected with the beam receiving and transmitting assembly and the scanning device and is used for controlling the scanning device to adjust different positions of the beam irradiating the measured target. The data acquisition and processing system is used for controlling the beam receiving and transmitting component to transmit and receive the beam, receiving echo data and forming an image of a certain position of the measured target according to the echo data. And the measured target can be imaged in real time by adopting a mode of scanning and imaging simultaneously. The echo data of each position of the measured target is completely independent, the measured target does not need to be imaged after being scanned, and the measured target can move in the scanning process.

Description

Real-time imaging system and human body security inspection device

Technical Field

The application relates to the field of human body security check, in particular to a real-time imaging system and a human body security check device.

Background

In the field of human body security inspection, various imaging techniques are applied to security inspection systems. The millimeter wave imaging technology is a technology for imaging by using high-frequency electromagnetic waves with the frequency of 30GHz-300 GHz, and compared with the traditional X-ray imaging technology, the infrared imaging technology and the microwave imaging technology, the millimeter wave imaging has the advantages of good safety, clothing penetration, high image resolution and the like, so that the millimeter wave imaging is suitable for human body security inspection, and millimeter wave human body security inspection instruments are deployed in partial airports in Europe, America and China. The millimeter wave security inspection system can be divided into an active millimeter wave security inspection system and a passive millimeter wave security inspection system according to whether the millimeter waves are radiated to the outside. Compared with a passive millimeter wave security inspection system, the active millimeter wave security inspection system has the advantages of clear imaging, high contrast, small environmental influence and the like.

In the traditional technology, the active millimeter wave human body security inspection system has the defects that real-time imaging is difficult, and a human body needs to be kept still in the inspection process.

Disclosure of Invention

Therefore, it is necessary to provide a real-time imaging system and a human body security inspection device for solving the problems that the active millimeter wave human body security inspection system is difficult to image in real time and the human body needs to be kept still in the inspection process.

A real-time imaging system is characterized by comprising a beam receiving and transmitting assembly, an optical assembly, a scanning device and a data acquisition and processing system. The beam transceiver module is used for generating a beam for irradiating a measured target, receiving the beam reflected by the measured target, and outputting echo data of the reflected beam. The optical assembly is used for converging and propagating the beam emitted by the beam transceiver assembly and the reflected beam. The scanning device is used for adjusting different positions of the measured target irradiated by the beams. The data acquisition and processing system is respectively connected with the beam receiving and transmitting assembly and the scanning device. The data acquisition and processing system is used for controlling the scanning device to adjust the beam to irradiate different positions of the measured target. The data acquisition and processing system is further configured to control the beam transceiver component to transmit and receive the beam. And the data acquisition and processing system receives the echo data transmitted by the beam receiving and transmitting component and forms a three-dimensional image of a certain position of the measured target according to the echo data.

In one embodiment, the beam transceiver component includes an array of transmit antenna lines, an array of receive antenna lines, and a beam transceiver. The array of transmit antenna lines is for transmitting the beam. The array of receive antennas is configured to receive the reflected beam. The beam transceiver is respectively connected with the transmitting antenna line array, the receiving antenna line array and the data acquisition and processing system. The beam transceiver is used for generating the beam and processing the reflected beam to generate the echo data.

In one embodiment, the array of transmit antennas comprises a plurality of transmit antennas and a plurality of electronic switches. The plurality of transmitting antennas are arranged at equal intervals in the first direction. One end of each electronic switch is connected with the beam transceiver. The other end of each electronic switch is respectively connected with one transmitting antenna.

In one embodiment, the array of receive antennas comprises a plurality of receive antennas and a plurality of electronic switches. The plurality of receiving antennas are arranged at equal intervals in the first direction. One end of each electronic switch is connected with the beam transceiver. The other end of each electronic switch is respectively connected with one receiving antenna.

In one embodiment, a plurality of the receiving antennas correspond to a plurality of the transmitting antennas one to one.

In one embodiment, the optical assembly includes a beam splitter and a focusing optical assembly. The beam splitter is used for propagating the beam transmitted by the transmitting antenna line array to the scanning device. The beam splitter enables the receiving antenna line array to receive the reflected beam. The focusing optical assembly is used for converging the emitted beam and the reflected beam into a fan-shaped beam.

In one embodiment, the focusing optical assembly comprises a cylindrical lens or a collimating optical system based on cylindrical reflecting surface focusing.

In one embodiment, the scanning apparatus includes an optical reflection device, a control unit, and a motor. The optical reflection device is used for reflecting the beam to enable the beam to irradiate the measured target. The control unit is respectively connected with the optical reflection device and the data acquisition and processing system. The control unit is used for controlling the optical reflection device to swing. The motor is respectively connected with the optical reflection device and the control unit.

In one embodiment, the optical reflection device includes one of a galvanometer, a reflective plate, and a mirror.

A human body security inspection device comprises the real-time imaging system.

In the real-time imaging system according to the embodiment of the present application, the beam transceiver module generates and transmits the beam. The beam passes through the optical assembly and the scanning device and irradiates a certain section of the measured target. And the wave beam carrying the information of the measured target is reflected and finally returns to the wave beam transceiving component. And the beam receiving and transmitting component processes the reflected beam to obtain the echo data. And the data acquisition and processing system forms a three-dimensional image of a certain position of the measured target according to the echo data. And adjusting the swing of the scanning device to enable the beams to irradiate different positions of the measured target. And reconstructing the three-dimensional image of the measured target according to the three-dimensional image of each position of the measured target and the position information of the scanning device corresponding to the three-dimensional image. The real-time imaging system adopts a mode of scanning and imaging at the same time, and a three-dimensional image of the measured target can be obtained after the scanning is finished. And in the imaging process, the echo data of each position of the detected target are completely independent and do not influence each other. Therefore, the measured target does not need to be imaged after being scanned, and can move in the scanning process.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a top view of a real-time imaging system provided in an embodiment of the present application;

fig. 2 is a schematic diagram of a beam transceiver module according to an embodiment of the present application;

fig. 3 is a schematic diagram illustrating an imaging result of a semi-physical simulation experiment for real-time imaging according to an embodiment of the present application;

fig. 4 is a schematic view of a scanning device according to an embodiment of the present application;

fig. 5 is a top view of a human body security inspection device according to an embodiment of the present application;

fig. 6 is a top view of a human body security inspection device according to another embodiment of the present application.

Description of the reference numerals

The real-time imaging system 10, the beam transceiver component 100, the optical component 200, the scanning device 300, the data acquisition and processing system 400, the object 500 to be detected, the transmitting antenna array 110, the receiving antenna array 120, the beam transceiver 130, the transmitting antenna 111, the electronic switch 112, the receiving antenna 121, the electronic switch 122, the beam splitter 210, the focusing optical component 220, the optical reflection device 310, the control unit 320, the motor 330, and the human body security inspection device 20.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below by way of embodiments and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, the present application provides a real-time imaging system 10. The real-time imaging system 10 includes: a beam transceiver assembly 100, an optical assembly 200, a scanning device 300, and a data acquisition and processing system 400. The beam transceiver module 100 is used for generating a beam for irradiating the target 500 and receiving the beam reflected by the target 500. The beam transceiver component 100 is configured to output echo data of the reflected beam. The optical assembly 200 is used to converge and propagate the beam emitted from the beam transceiver assembly 100 and the reflected beam. The scanning device 300 is used for adjusting different positions of the measured target 500 irradiated by the beams. The data acquisition and processing system 400 is connected to the beam transceiver assembly 100 and the scanning device 300, respectively. The data acquisition and processing system 400 is used to control the scanning device 300 to adjust the beam to illuminate different positions of the measured object 500. The data acquisition and processing system 400 is also used to control the beam transceiver component 100 to transmit and receive the beam. The data acquisition and processing system 400 receives the echo data transmitted by the beam transceiver assembly 100 and forms a three-dimensional image of a position of the target 500 according to the echo data.

First, the data acquisition and processing system 400 controls the beam transceiver component 100 to generate and transmit a beam. The beam leaves the beam transceiver module and reaches the position of the optical module 200. The optical assembly 200 converges the beam into a fan beam. Then, the beam is reflected by the scanning device 300 and irradiated to a position of the target 500. The measured object 500 reflects the beam. The beam passes through the scanning device 300 and the optical component 200 in sequence according to the original path, and is finally received by the beam transceiver component 100. The beam transceiver component 100 processes the reflected beam to obtain the echo data. The echo data includes image information of the irradiated position of the target 500. The beam transceiver component 100 transmits the echo data to the data acquisition and processing system 400. The data acquisition and processing system 400 forms a three-dimensional image of a location of the object 500 based on the echo data and a processing algorithm. At the same time, the data acquisition and processing system 400 stores the position information of the scanning device during this process.

After the above-mentioned one-time imaging is completed, the data acquisition and processing system 400 controls the beam transceiver module 100 to generate and transmit the beam. Moreover, the data acquisition and processing system 400 controls the scanning device 300 to adjust the beam to illuminate different positions of the target 500. By adjusting the beam by the scanning device 300, the scanning of the whole object 500 to be measured can be completed. At this time, the data acquisition and processing system 400 includes three-dimensional images of different positions of the measured object 500 and position information of the scanning device 300 corresponding to the three-dimensional images of different positions. The data acquisition and processing system 400 reconstructs a three-dimensional image of the object 500 according to the three-dimensional images of different positions of the object 500 and the position information of the scanning device 300 corresponding to the three-dimensional images of different positions.

The real-time imaging system 10 uses the beam to scan and image a certain position of the measured object 500. Then, the scanning device 300 adjusts the beam to irradiate different positions of the measured object 500, so as to obtain three-dimensional images of the measured object 500 at different positions. Finally, a three-dimensional image of the measured object 500 is reconstructed according to the three-dimensional images at different positions and the corresponding position information of the scanning device 300. In the process, the echo data generated by scanning different positions of the measured object 500 are completely independent and do not influence each other. Imaging is carried out after full-scene scanning is not required to be completed, and the measured target does not need to be kept static in the scanning process. In addition, the imaging speed is accelerated by the mode of scanning and imaging at the same time, and real-time imaging can be realized.

In one embodiment, the real-time imaging system 10 is adapted for real-time imaging of multiple wavelength bands. The real-time imaging system 10 is suitable for the whole terahertz waveband (i.e., the light wave frequency is 0.1-10THz, and the wavelength is 3000-30um), the infrared waveband and the visible light waveband.

In one embodiment, the real-time imaging system 10 may be applied to medical inspection or military applications.

Referring to fig. 2, in one embodiment, the beam transceiver component 100 includes a transmit antenna line array 110, a receive antenna line array 120, and a beam transceiver 130. The array of transmit antenna lines 110 is used to transmit the beam. The array of receive antennas 120 is used to receive the reflected beam. The beam transceiver 130 is connected to the transmit antenna line array 110, the receive antenna line array 120, and the data acquisition and processing system 400, respectively. The beam transceiver 130 is configured to generate the beam, and perform signal processing on the reflected beam to generate the echo data.

The data acquisition and processing system 400 may control the beam transceiver 130 to generate the beam. The beam is transmitted from the array of transmit antenna lines 110. The array of receive antennas 120 receives the reflected beam and transmits the beam into the beam transceiver 130. The beam transceiver 130 performs signal processing on the reflected beam to obtain the echo data. The beam transceiver 130 transmits the echo data to the data acquisition and processing system 400.

An array of lines is employed in the beam transceiver component 100 to transmit and receive the beams at a lower cost.

In one embodiment, the transmit antenna line array 110 includes a plurality of transmit antennas 111 and a plurality of electronic switches 112. The plurality of transmitting antennas 111 are arranged at equal intervals in the first direction. One end of each of the electronic switches 112 is connected to the beam transceiver 130. The other end of each of the electronic switches 112 is connected to one of the transmitting antennas 111.

The first direction is a vertical direction. The rapid closing and opening of the electronic switch 112 completes the transmission of the beam once by the transmitting antenna 111 connected to the electronic switch 112. The real-time imaging system 10 may control a plurality of the electronic switches 112 in batch, or may control one of the electronic switches 112 individually.

In one embodiment, the array of receive antennas 120 includes a plurality of receive antennas 121 and a plurality of electronic switches 122. The plurality of receiving antennas 121 are arranged at equal intervals in the first direction. One end of each of the electronic switches 122 is connected to the beam transceiver 130. The other end of each of the electronic switches 122 is connected to one of the receiving antennas 121.

The first direction is a vertical direction. The rapid closing and opening of the electronic switch 122 completes the reception of the beam by the receiving antenna 121 connected to the electronic switch 122. The real-time imaging system 10 may control a plurality of the electronic switches 122 in batch, or may control one of the electronic switches 122 individually.

In the above embodiment, the electrical switching time for the closing and opening of the electronic switch 112 and the electronic switch 122 is in the order of microseconds. Therefore, the total time for scanning the object 500 under test is short, in the order of milliseconds. The imaging of different positions of the measured object 500 is not affected by the motion blur of the human body.

In one embodiment, a plurality of the receiving antennas 121 corresponds to a plurality of the transmitting antennas 111 one to one.

Each of the receiving antennas 121 corresponds to one of the transmitting antennas 111. The plurality of receiving antennas 121 and the plurality of transmitting antennas 111 are in one-to-one correspondence in spatial position. In one embodiment, each of the transmit antennas 111 corresponds to a plurality (two or more) of the receive antennas 121.

In one embodiment, the transceiving combination of the transmitting antenna array 110 and the receiving antenna array 120 may adopt a single-transmitting single-receiving (SISO) mode, a single-transmitting double-receiving mode, or a multiple-transmitting multiple-receiving (MIMO) mode.

Referring to fig. 3, one embodiment provides imaging results of a semi-physical simulation test of real-time imaging. The real-time imaging system 10 performs a simulation experiment in a millimeter wave band, and scans the target 500 to be measured by using a millimeter wave beam. In the real-time imaging system 10, the transmitting and receiving combinations of the transmitting antenna array 110 and the receiving antenna array 120 respectively adopt a single-transmitting single-receiving (SISO) mode and a multiple-transmitting multiple-receiving (MIMO) mode to image the T-shaped metal object. Table 1 is the simulation parameters for the corresponding real-time imaging system 10. The left one in fig. 3 is a T-shaped metal plate model, the middle is the imaging result in single-transmit single-receive (SISO) mode, and the right one is the imaging result in multiple-transmit multiple-receive (MIMO) mode. Experimental results show that the real-time imaging system 10 can clearly image the target 500 whether in a single-transmission single-reception (SISO) mode or a multiple-transmission multiple-reception (MIMO) mode. The imaging definition is slightly poor in the multiple-input multiple-output (MIMO) mode, but the number of transmit-receive antennas required by the multiple-input multiple-output (MIMO) mode is greatly reduced.

TABLE 1

Parameter(s)	SISO mode	MIMO mode
			Center frequency	30GHz	30GHz
Bandwidth of	5GHz	5GHz
			Frequency sampling interval	0.064GHz	0.064GHz
Number of transmitting antennas	196	14
			Number of receiving antennas	196	14
Horizontal sampling range	(-0.5m,0.5m)	(-0.5m,0.5m)
			Array length	1m	1m
Imaging distance	1m	1m

Referring to fig. 1, in one embodiment, the optical assembly 200 includes a beam splitter 210 and a focusing optical assembly 220. The beam splitter 210 is used to propagate the beam emitted by the transmit antenna array 110 towards the scanning device. The beam splitter 210 is also used to make the receiving antenna line array 120 receive the reflected beam. The focusing optics 220 are used to converge the emitted beam and the reflected beam into a fan beam.

The array of transmit antenna lines 110 transmit the beam. The beam will be transmitted through the beam splitter 210 and then be focused by the focusing optics 220. The beam is modulated by the scanning device 300 to illuminate a portion of the object 500 under test. The beam is then reflected by the measured object 500. The beam passes through the scanning device 300 to the focusing optical assembly 220 and is converged by the focusing optical assembly 220. After reaching the beam splitter 210, the beam is reflected by the beam splitter 210. The beam is finally received by the array of receive antennas 120. During the beam propagation, the optical path lengths of the transmitting antenna line array 110 and the receiving antenna line array 120 are consistent. It is equivalent to the transmission and reception of the beam with the transmission antenna line array 110 and the reception antenna line array 120 at the same position.

In one embodiment, the focusing optics 220 include a cylindrical lens or collimating optical system based on cylindrical reflective surface focusing.

The cylindrical lens may include one of a hyperbolic cylindrical lens, an aspherical cylindrical lens, and a conical cylindrical lens. The collimating optical system based on the focusing of the cylindrical reflecting surface can avoid the attenuation of beam signals by the lens.

Referring to fig. 4, the scanning apparatus 300 includes an optical reflection device 310, a control unit 320, and a motor 330. The optical reflection device 310 is configured to reflect the beam, so that the beam illuminates the target 500. The control unit 320 is connected to the optical reflection device 310 and the data acquisition and processing system 400, respectively. The control unit 320 is used for controlling the optical reflection device 310 to swing. The motor 330 is connected to the optical reflection device 310 and the control unit 320, respectively.

The optical reflection device 310 may reflect the beam, and change a propagation direction of the beam, so that the beam irradiates the target 500. Meanwhile, the optical reflection device 310 may swing. By changing the angle of the optical reflection device 310, the position of the measured object 500 irradiated by the beam can be changed. The motor 330 powers the optical reflection device 310. The data acquisition and processing system 400 controls the swing of the optical reflection device 310 by controlling the control unit 320.

In one embodiment, the optical reflection device 310 includes one of a galvanometer, a reflective plate, and a mirror.

Referring to fig. 5, the present application provides a human body security inspection apparatus 20 including the real-time imaging system 10 according to any of the above embodiments.

The human body security check device 20 comprises two real-time imaging systems 10. The detected target 500 is in a security check channel, and the two real-time imaging systems 10 are respectively arranged on the left side and the right side of the security check channel. The two real-time imaging systems 10 are used for imaging and detecting the target 500 to be detected in different directions (i.e. front and back). After the object 500 enters the security inspection channel along the arrow direction in the figure, the real-time imaging system 10 on the right side performs three-dimensional imaging on the back side of the object 500. After the target passes through the position trigger in the center of the security check channel, the real-time imaging system 10 on the left side performs three-dimensional imaging on the front surface of the detected target 500. And finally, reconstructing an omnidirectional three-dimensional image of the detected target 500 according to the results of the two three-dimensional imaging. Objects of different materials will have different gray values in the three-dimensional image. And judging whether the detected object 500 carries forbidden articles or not according to the shape feature and the gray value feature obtained from the three-dimensional image.

Referring to fig. 6, in one embodiment, the human body security check device 20 includes a real-time imaging system 10. The real-time imaging system 10 is arranged on one side of the security inspection channel. After the detected target 500 enters the security inspection channel, the real-time imaging system 10 performs three-dimensional imaging on the front surface of the detected target 500. Then, the measured object 500 turns according to the prompt, and the real-time imaging system 10 performs three-dimensional imaging on the back of the measured object 10. And finally, reconstructing an omnidirectional three-dimensional image of the detected target 500 according to the results of the two three-dimensional imaging.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present patent. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A real-time imaging system, comprising:

a beam transceiver component (100) for generating a beam for illuminating a target under test (500), receiving the beam reflected by the target under test (500), and outputting echo data of the reflected beam;

an optical assembly (200) for converging and propagating the beam emitted by the beam transceiver assembly (100) and the reflected beam;

scanning means (300) for adjusting different positions at which the beam irradiates the object under test (500);

the data acquisition and processing system (400) is respectively connected with the beam transceiver component (100) and the scanning device (300) and is used for controlling the scanning device (300) to adjust the beam to irradiate different positions of the measured target (500);

the data acquisition and processing system (400) is further configured to control the beam transceiver component (100) to transmit and receive the beam, receive the echo data transmitted by the beam transceiver component (100), and form a three-dimensional image of a certain position of the measured object (500) according to the echo data.

2. The real-time imaging system of claim 1, wherein the beam transceiver component (100) comprises:

an array of transmit antenna lines (110) for transmitting the beam;

an array of receive antennas (120) for receiving the reflected beam;

and the beam transceiver (130) is respectively connected with the transmitting antenna line array (110), the receiving antenna line array (120) and the data acquisition and processing system (400) and is used for generating the beam and carrying out signal processing on the reflected beam to generate the echo data.

3. The real-time imaging system of claim 2, wherein the array of transmit antenna lines (110) comprises:

a plurality of transmitting antennas (111) arranged at equal intervals in a first direction;

a plurality of electronic switches (112), one end of each electronic switch (112) is connected with the beam transceiver (130), and the other end of each electronic switch (112) is connected with one transmitting antenna (111).

4. The real-time imaging system of claim 2, wherein the array of receive antenna lines (120) comprises:

a plurality of receiving antennas (121) arranged at equal intervals in the first direction;

a plurality of electronic switches (122), one end of each electronic switch (122) is connected with the beam transceiver (130), and the other end of each electronic switch (122) is connected with one receiving antenna (121).

5. The real-time imaging system of claim 4, wherein a plurality of the receiving antennas (121) correspond one-to-one to a plurality of the transmitting antennas (111).

6. The real-time imaging system of claim 1, wherein the optical assembly (200) comprises:

a beam splitter (210) for propagating the beam transmitted by the transmit antenna line array (110) towards the scanning device and for receiving the reflected beam by the receive antenna line array (120);

a focusing optical assembly (220) for converging the emitted beam and the reflected beam into a fan beam.

7. The real-time imaging system of claim 6, wherein the focusing optical assembly (220) comprises a cylindrical lens or a collimating optical system based on cylindrical reflective surface focusing.

8. The real-time imaging system of claim 1, wherein the scanning device (300) comprises:

an optical reflection device (310) for reflecting the beam so that the beam irradiates the measured object (500);

the control unit (320) is respectively connected with the optical reflection device (310) and the data acquisition and processing system (400) and is used for controlling the optical reflection device (310) to swing;

and the motor (330) is respectively connected with the optical reflection device (310) and the control unit (320).

9. The real-time imaging system of claim 8, wherein the optical reflection device (310) comprises one of a galvanometer, a mirror plate, and a mirror.

10. A human body security check device comprising the real-time imaging system of any one of claims 1-9.