CN116165723A - Millimeter wave human body imaging security check processing system and method and security check instrument - Google Patents

Millimeter wave human body imaging security check processing system and method and security check instrument Download PDF

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Publication number
CN116165723A
CN116165723A CN202310172004.7A CN202310172004A CN116165723A CN 116165723 A CN116165723 A CN 116165723A CN 202310172004 A CN202310172004 A CN 202310172004A CN 116165723 A CN116165723 A CN 116165723A
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millimeter wave
data processor
antenna array
processing system
switch antenna
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杨小峰
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Shanghai High Tech Industrial Development Co ltd
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Shanghai High Tech Industrial Development Co ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/005—Prospecting or detecting by optical means operating with millimetre waves, e.g. measuring the black losey radiation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging

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  • Remote Sensing (AREA)
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  • Radar, Positioning & Navigation (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

The application provides a millimeter wave human body imaging security check processing system and method, security check appearance, is applied to security check technical field, and wherein millimeter wave human body imaging security check processing system includes: the device comprises a switch antenna array, a servo driving mechanism and a data processor, wherein the data processor controls the switch antenna array to scan beams, controls the servo driving mechanism to drive the switch antenna array to move along the vertical direction, and performs three-dimensional reconstruction on echo signals received by the switch antenna array based on a synthetic aperture radar imaging algorithm, wherein the switch antenna array is used for scanning beams in the horizontal direction and scanning beams in the vertical direction when moving along the vertical direction. The horizontal and vertical beam scanning is carried out through the one-dimensional linear array which is horizontally arranged, so that the security inspection instrument is greatly simplified, the design of the security inspection instrument is simplified, the cost and the implementation difficulty can be reduced, and the application range of the security inspection instrument is enlarged.

Description

Millimeter wave human body imaging security check processing system and method and security check instrument
Technical Field
The application relates to the technical field of security inspection, in particular to a millimeter wave human body imaging security inspection processing system and method and a security inspection instrument.
Background
In occasions such as civil aviation and customs, when security inspection is carried out aiming at whether an approach person carries contraband or not, the mode of combining manual operation with handheld scanning equipment is basically adopted at the present stage, on one hand, the manual inspection is low in efficiency, and on the other hand, the existing handheld equipment is single in function, small in detection range and the like, so that in actual security inspection, the efficiency is low, and the contraband is easy to leak.
Based on this, a new security solution is needed.
Disclosure of Invention
In view of this, the embodiment of the specification provides a millimeter wave human body imaging security inspection processing system and method and a security inspection instrument, which realize millimeter wave human body three-dimensional imaging, improve security inspection efficiency and reduce missing inspection conditions.
The embodiment of the specification provides the following technical scheme:
the embodiment of the specification provides a millimeter wave human body imaging security check processing system, which comprises: a switch antenna array, a servo driving mechanism and a data processor;
the servo driving mechanism is used for driving the switch antenna array to move along the vertical direction;
the switch antenna array comprises a plurality of millimeter wave antenna arrays which are arranged along the horizontal direction, and the millimeter wave antenna arrays are used for transmitting millimeter wave signals and receiving echo signals to the space so as to respectively perform horizontal beam scanning and vertical beam scanning when moving along the vertical direction;
the data processor is configured to:
controlling the switch antenna array to transmit millimeter wave signals and receive echo signals;
controlling the servo driving mechanism to drive the switch antenna array to move along the vertical direction;
and carrying out three-dimensional reconstruction on the echo signals received by the switch antenna array based on a synthetic aperture radar imaging algorithm so as to form a three-dimensional image corresponding to the security personnel.
Preferably, the millimeter wave human body imaging security check processing system further comprises: the identification module is used for identifying whether the target object exists in the three-dimensional image according to image information corresponding to a preset target object, and recording the position information of the target object in the three-dimensional image when the target object exists in the three-dimensional image.
Preferably, the target comprises at least one of the following: metal cutters, ceramic cutters, explosive articles, flammable and explosive liquids, gels, and electronic devices;
the recognition module pre-trains the target object based on a deep learning algorithm so as to obtain the target object detection model after training.
Preferably, the data processor comprises a control unit and a GPU acceleration unit;
the control unit is used for controlling the switch antenna array and the servo driving mechanism to drive;
the GPU acceleration unit is used for carrying out three-dimensional reconstruction on echo signals received by the switch antenna array based on a synthetic aperture radar imaging algorithm so as to form a three-dimensional image corresponding to the detected human body.
Preferably, the millimeter wave human body imaging security check processing system further comprises: the communication unit and the industrial personal computer terminal;
the data processor is arranged in the industrial personal computer terminal, and the communication unit is used for data communication between the data processor, the servo driving mechanism and the switch antenna array.
Preferably, the communication unit comprises a TCP/IP module and a serial port module, wherein the serial port module is used for data communication between the data processor and the servo driving mechanism, and the TCP/IP module is used for data communication between the data processor and the switch antenna array.
Preferably, the millimeter wave human body imaging security check processing system further comprises: the identity recognition unit is used for collecting identity document information of the security personnel and transmitting the identity document information to the data processor; the data processor is also used for verifying the identity document information;
and/or, the millimeter wave human body imaging security check processing system further comprises: the image acquisition unit is used for acquiring the portrait information of the security personnel and transmitting the portrait information to the data processor.
Preferably, the identity recognition unit and the data processor are in data communication based on a USB protocol;
and/or the image acquisition unit and the data processor are in data communication based on a TCP/IP protocol.
Preferably, the millimeter wave human body imaging security check processing system further comprises: the ultrasonic sensor is used for detecting whether the person to be inspected reaches the designated position or not, and sending a security check signal to the data processor when judging that the person to be inspected reaches the designated position; and the data processor controls the servo driving mechanism and the switch antenna array to perform millimeter wave three-dimensional imaging on the security personnel under the triggering of the security signal.
Preferably, the millimeter wave human body imaging security check processing system further comprises: an indication unit for indicating security information, the indication unit comprising at least one of the following indication devices: the device comprises a power supply indicator lamp, an operation indicator lamp, an alarm lamp, an illuminating lamp and a sound module; the data processor controls the indication unit based on an IO control protocol.
The embodiment of the specification also provides a millimeter wave human body imaging security check processing method, which is applied to the millimeter wave human body imaging security check processing system in any one of the specification, and the millimeter wave human body imaging security check method comprises the following steps:
when the security personnel are detected to be located at the preset position, the data processor controls the horizontally arranged switch antenna array to perform beam scanning so as to obtain echo signals of the security personnel in the horizontal direction;
the data processor controls the servo driving mechanism to drive the switch antenna array to move in the vertical direction and controls the switch antenna array to scan the wave beam so as to obtain an echo signal of a person to be checked in the vertical direction;
and the data processor performs three-dimensional reconstruction on the echo signals received by the switch antenna array based on a synthetic aperture radar imaging algorithm so as to form a three-dimensional image corresponding to the security personnel.
The embodiment of the specification also provides a millimeter wave human body imaging security check instrument, which comprises:
the door-shaped body is used for accommodating security personnel;
the millimeter wave human body imaging security check processing system according to any one of the specification;
the switch antenna arrays are respectively arranged in the frames at the two sides of the door-shaped body along the horizontal direction, and the switch antenna arrays move in the vertical direction in the frames under the driving of the servo driving mechanism.
Compared with the prior art, the beneficial effects that above-mentioned at least one technical scheme that this description embodiment adopted can reach include at least:
the horizontal direction beam scanning is carried out based on the one-dimensional linear array which is horizontally arranged, and the vertical direction beam scanning is carried out when the one-dimensional linear array moves along the vertical direction, so that the three-dimensional image corresponding to the security personnel is obtained by carrying out three-dimensional reconstruction on echo signals obtained by the beam scanning based on the synthetic aperture radar imaging algorithm, the three-dimensional imaging in security inspection can be automatically completed, the security inspection efficiency is high, the imaging resolution is high, and the omission is not easy to occur.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a millimeter wave human imaging security inspection processing system in the present application;
fig. 2 is a schematic circuit diagram of a millimeter wave human imaging security inspection processing system in the present application;
FIG. 3 is a schematic structural diagram of a millimeter wave human imaging security check instrument in the present application;
fig. 4 is a flowchart of a millimeter wave human imaging security check processing method in the present application.
Detailed Description
Embodiments of the present application are described in detail below with reference to the accompanying drawings.
Other advantages and effects of the present application will become apparent to those skilled in the art from the present disclosure, when the following description of the embodiments is taken in conjunction with the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. The present application may be embodied or carried out in other specific embodiments, and the details of the present application may be modified or changed from various points of view and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
It is noted that various aspects of the embodiments are described below within the scope of the following claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art will appreciate that one aspect described herein may be implemented independently of any other aspect, and that two or more of these aspects may be combined in various ways. For example, apparatus may be implemented and/or methods practiced using any number and aspects set forth herein. In addition, such apparatus may be implemented and/or such methods practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should also be noted that the illustrations provided in the following embodiments merely illustrate the basic concepts of the application by way of illustration, and only the components related to the application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided in order to provide a thorough understanding of the examples. However, it will be understood by those skilled in the art that the present invention may be practiced without these specific details.
At present, in occasions such as civil aviation and customs, personal belongings security inspection is still carried out on near-field personnel based on manual combination of simple handheld equipment, security inspection efficiency is low, and missed inspection is easy to occur.
Therefore, it is necessary to develop a security inspection instrument capable of automatically imaging a human body.
In view of this, through carrying out intensive study and improvement exploration to security inspection scene, security inspection demand and security inspection scheme, this description embodiment has proposed a millimeter wave human imaging security inspection processing scheme: in view of the good penetrability of millimeter waves to clothing materials and most packaging materials and the reflection characteristics on the surfaces of human bodies and organisms, the millimeter wave antenna array can be used for scanning and imaging security inspection personnel, namely, a one-dimensional linear array (such as a horizontally placed switch antenna array) is arranged on the side surface of the security inspection instrument, millimeter wave beams are further emitted by the switch antenna array, a human body scanning image is obtained by acquiring millimeter wave signals reflected by the surfaces of human bodies after the millimeter wave beams are absorbed by the human bodies, foreign bodies carried by the human bodies are detected through image recognition, and metal or nonmetal objects hidden under the clothing and on the surfaces of the human bodies can be rapidly found and identified. Specifically, the one-dimensional linear array can perform beam scanning in the horizontal direction (for example, the x direction) on the human body, and when the one-dimensional linear array is controlled to move along the vertical direction through the servo scanning system, the one-dimensional linear array can perform beam scanning in the vertical direction (for example, the y direction) on the human body, and finally, three-dimensional reconstruction of echo data is realized by utilizing a synthetic aperture radar imaging algorithm, so that three-dimensional imaging on the human body is realized.
Therefore, the characteristics of millimeter waves are utilized, and the three-dimensional imaging is obtained by combining the x-direction scanning data and the y-direction scanning data, so that articles (such as dangerous articles, contraband articles and the like) which do not belong to human tissues and the positions of the articles can be clearly displayed in the three-dimensional imaging result, the subsequent synthesis of the articles and the positions of the articles into a figure of a detected person is convenient, and the on-site security personnel can intuitively finish security inspection operation on the person entering and exiting, so that detection and early warning of the articles carried by the human body are realized.
It should be noted that, can adopt active millimeter wave synthetic aperture radar imaging technique, realize X through millimeter wave antenna array, y to scanning, human imaging can be carried out to the personnel of examining, imaging speed is fast, image resolution is high, not only can the short-term test hide under clothing and various articles and simulants of human body surface, can also carry out automatic identification sign to the hiding position of article and simulant, therefore realize automatic security check, it is efficient, also be difficult to leak and examine.
The following describes the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.
As shown in fig. 1, the present specification provides a millimeter wave human imaging security inspection processing system, including: a switched antenna array 1, a servo drive mechanism 2 and a data processor (not shown in fig. 1).
The switch antenna array 1 is used as a one-dimensional linear array and horizontally arranged on two sides of the security inspection instrument, and the linear array comprises a plurality of millimeter wave antenna units, so that millimeter wave signals can be transmitted to space and echo signals can be received by utilizing the millimeter wave antenna units, and thus, the security inspection personnel 3 standing in the security inspection instrument can be scanned by a beam in the horizontal direction (marked as x direction) and the beam in the vertical direction (marked as y direction) when moving along the vertical direction.
Correspondingly, the servo driving mechanisms 2 for driving the switch antenna array 1 to move in the vertical direction are correspondingly arranged on two sides of the security inspection instrument, so that when the security inspection personnel need to scan the beams in the vertical direction, the switch antenna array 1 is timely and accurately driven to move in the vertical direction through the servo driving mechanisms 2.
The data processor may be configured to perform the following functions:
controlling the switch antenna array 1 to transmit millimeter wave signals and receive echo signals;
the servo driving mechanism 2 is controlled to drive the switch antenna array 1 to move along the vertical direction;
and carrying out three-dimensional reconstruction on the echo signals received by the switch antenna array based on a synthetic aperture radar imaging algorithm so as to form a three-dimensional image corresponding to the security personnel.
The synthetic aperture radar imaging algorithm may be an existing algorithm, and is not limited herein. In addition, the data processor may be provided with the servo drive mechanism and/or the switch antenna array, or may be provided separately.
The horizontal beam scanning is performed by the one-dimensional linear array, and the vertical beam scanning is performed while moving in the vertical direction, so that echo data in two directions can be obtained, and three-dimensional imaging is performed based on the echo data. Therefore, on one hand, the security inspection imaging has the advantages of simple structure, less required equipment and simple control flow, and is very beneficial to rapidly implementing security inspection schemes in various scenes; secondly, imaging required by automatic security inspection is realized, security inspection efficiency is improved, imaging after horizontal and vertical beam scanning is performed based on millimeter waves, omnidirectional imaging and detection can be realized, and omission is not easy to occur; in the three aspects, millimeter wave imaging can obtain extremely high resolution, and can well image prohibited articles hidden on the body surface of a human body, so that the occurrence of missed detection in security inspection is reduced.
In some embodiments, the millimeter wave frequency for imaging can be the working frequency between 27GHz and 33GHz, the millimeter wave technology in the frequency range is relatively mature at present, the antenna array is easy to design, the implementation difficulty is low, and the cost is low.
In some embodiments, the intelligent detection method can utilize artificial intelligent algorithms such as deep learning to identify prohibited articles such as various metals/non-metals (such as metal knives, ceramic knives, explosives, flammable and explosive liquids, jelly and electronic equipment), can improve the security inspection efficiency, can also improve the security inspection precision, has a wide detection range, and can flexibly adapt to various security inspection scenes. Therefore, the millimeter wave human body imaging security check processing system further comprises: and the identification module (not shown in fig. 1) is used for identifying whether the target object exists in the three-dimensional image according to the image information corresponding to the preset target object, and recording the position information of the target object in the three-dimensional image when the target object exists in the three-dimensional image.
Further, image information pre-training of the target object (i.e., contraband) can be performed based on an artificial intelligence algorithm, and a good classifier is formed.
In some embodiments, for example, corresponding to forbidden targets such as metal cutters, ceramic cutters, explosive, flammable and explosive liquids, jelly, electronic equipment and the like, each target can be pre-trained based on a deep learning algorithm, and form information of each target or analog in each hidden state is obtained, so that image information of each target in different hidden states is obtained after training, imaging precision and resolution are improved, and the possibility of missed detection is reduced.
In some embodiments, the image acceleration processing can be performed by using the mobile terminal GPU, more data can be acquired within the same time, the millimeter wave imaging algorithm can be accelerated, the imaging speed can be improved, and the image accuracy can be improved.
In practice, the separate functional units may be divided in the data processor, i.e. the data processor comprises a control unit, a GPU acceleration unit. The control unit is used for controlling the switch antenna array and the servo driving mechanism to drive; the GPU acceleration unit is used for carrying out acceleration processing on echo data, namely carrying out three-dimensional reconstruction on echo signals received by the switch antenna array based on a synthetic aperture radar imaging algorithm so as to form a three-dimensional image corresponding to a detected human body.
It should be noted that, the GPU acceleration unit may be used as a core for data processing, and may accelerate the acquisition, processing, three-dimensional reconstruction, etc. of echo data, so as to improve the efficiency and accuracy of overall imaging.
In some embodiments, functional modules, such as video acquisition, identity ID recognition, ultrasonic ranging, indication modules and the like, can be additionally arranged in the security inspection instrument, can be flexibly configured through the data processor, and can meet the requirements of independent configuration, independent debugging and the like of different application occasions.
In one example, the millimeter wave human imaging security check processing system further comprises: the identity recognition unit is used for collecting identity document information of the security personnel and transmitting the identity document information to the data processor; the data processor is also used for verifying the identity document information.
For example, as shown in fig. 3, the identity recognition unit 6 is disposed at the entrance of the security inspection instrument, so that the identity document information of the person to be inspected can be recognized quickly by the identity recognition unit, and then security inspection can be performed.
In one example, the millimeter wave human imaging security check processing system further comprises: and the image acquisition unit 7 is used for acquiring the portrait information of the security personnel and transmitting the portrait information to the data processor.
In one example, the millimeter wave human imaging security check processing system further comprises: an ultrasonic sensor (not shown in the figure) for detecting whether the person to be inspected reaches a specified position, and transmitting a security inspection signal to the data processor when it is determined that the person to be inspected reaches the specified position; and the data processor controls the servo driving mechanism and the switch antenna array to perform millimeter wave three-dimensional imaging on the security personnel under the triggering of the security signal.
In one example, the millimeter wave human imaging security check processing system further comprises: an indication unit for indicating security information, the indication unit comprising at least one of the following indication devices: the device comprises a power supply indicator lamp, an operation indicator lamp, an alarm lamp, an illuminating lamp and a sound module; the data processor controls the indication unit based on an IO control protocol. The power supply indicator is used for indicating the power supply of the security inspection instrument, the operation indicator is used for indicating the operation state of the security inspection instrument, the alarm lamp is used for indicating that security inspection personnel carry contraband, the illuminating lamp is used for illuminating the security inspection instrument, the sound module is used for prompting sound prompts such as standing positions and standing postures of the security inspection personnel, and alarming sounds can be sent out when people carry the contraband.
In some embodiments, the functions of controlling and presenting imaging and the like which are beneficial to the operation of security personnel can be integrated and arranged in the industrial personal computer terminal, so that the detection of imaging is arranged at the front end, the judgment after imaging and imaging is arranged at the rear end, and at this time, the data communication between the modules can be completed based on the communication unit.
As shown in fig. 2 and 3, the millimeter wave human body imaging security inspection processing system further includes: a communication unit (not shown separately in the figures) and an industrial personal computer terminal 4. The data processor is arranged in the industrial personal computer terminal 4, and the communication unit is used for data communication between the data processor, the servo driving mechanism and the switch antenna array.
In implementation, the industrial personal computer terminal can run millimeter wave human body imaging security check processing system software, so that dangerous goods and positions thereof existing in the images are imaged, detected and marked clearly on the terminal, and the dangerous goods and the positions thereof are synthesized on a figure corresponding to a checked person and displayed to the scene security check person, and detection and early warning of dangerous goods carried by a human body can be realized.
It should be noted that the communication unit may be a unit module based on protocols such as TCP/IP protocol, serial port protocol (such as RS232, RS485, etc.), digital IO control protocol, etc., and may be determined according to the communication needs between the data processor and the specific functional module.
In one example, as shown in fig. 2, the communication unit includes a TCP/IP module and a serial port module, wherein the serial port module is used for data communication between the data processor and the servo driving mechanism, and the TCP/IP module is used for data communication between the data processor and the switch antenna array (such as the first array and the second array shown in fig. 2).
In an example, the communication unit further includes an IO control module, where the IO control module may be used for communication of digital signals, such as on/off control of an indicator light, such as transmission of a detection result of whether a person to be checked enters a predetermined position of the security inspection apparatus by an ultrasonic sensor, such as controlling sounding of a sound module according to a security inspection result, and so on.
In one example, the identification unit and the data processor communicate data based on a USB protocol; and/or, the image acquisition unit (such as a camera) and the data processor are in data communication based on a TCP/IP protocol.
In some embodiments, the servo drive mechanism may include a driver for driving the servo motor and a servo motor for driving the one-dimensional linear array to perform a movement in a vertical direction.
Based on the same inventive concept, the specification also provides a millimeter wave human body imaging security inspection instrument which can be suitable for occasions such as civil aviation, customs and the like.
As shown in fig. 3, the millimeter wave human imaging security check instrument may include:
a door-shaped body 5 for accommodating a security personnel;
the millimeter wave human imaging security inspection processing system according to any one of the preceding embodiments;
wherein, switch antenna arrays which are arranged along the horizontal direction are respectively arranged in the frames at the two sides of the door-shaped body 5, and the switch antenna arrays move in the vertical direction in the frames under the drive of a servo driving mechanism.
Based on the same inventive concept, the present disclosure also provides a millimeter wave human body imaging security inspection processing method, which is applied to the millimeter wave human body imaging security inspection processing system according to any one of the embodiments in the present disclosure, so as to control each corresponding module in the system and complete security inspection imaging.
As shown in fig. 4, the millimeter wave human body imaging security inspection method includes:
step S402, detecting whether a person to be checked reaches a designated position, if so, executing step S404;
the designated position may be a position where the security personnel stand during security inspection, or may be a position corresponding to a position where the security personnel enter the security inspection range, which is not limited herein.
Step S404, the data processor controls the switch antenna array which is horizontally arranged to scan wave beams so as to obtain echo signals of security personnel in the horizontal direction; the data processor controls the servo driving mechanism to drive the switch antenna array to move in the vertical direction and controls the switch antenna array to scan the wave beam so as to obtain an echo signal of a person to be checked in the vertical direction;
the beam scanning may be performed in the horizontal direction or in the vertical direction, and is not limited herein.
Step S406, the data processor performs three-dimensional reconstruction on the echo signals received by the switch antenna array based on the synthetic aperture radar imaging algorithm so as to form a three-dimensional image corresponding to the security personnel.
In this specification, identical and similar parts of the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the embodiments described later, the description is relatively simple, and reference is made to the description of parts of the system embodiments where relevant.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (12)

1. A millimeter wave human imaging security inspection processing system, comprising: a switch antenna array, a servo driving mechanism and a data processor;
the servo driving mechanism is used for driving the switch antenna array to move along the vertical direction;
the switch antenna array comprises a plurality of millimeter wave antenna arrays which are arranged along the horizontal direction, and the millimeter wave antenna arrays are used for transmitting millimeter wave signals and receiving echo signals to the space so as to respectively perform horizontal beam scanning and vertical beam scanning when moving along the vertical direction;
the data processor is configured to:
controlling the switch antenna array to transmit millimeter wave signals and receive echo signals;
controlling the servo driving mechanism to drive the switch antenna array to move along the vertical direction;
and carrying out three-dimensional reconstruction on the echo signals received by the switch antenna array based on a synthetic aperture radar imaging algorithm so as to form a three-dimensional image corresponding to the security personnel.
2. The millimeter wave human imaging security inspection processing system of claim 1, further comprising: the identification module is used for identifying whether the target object exists in the three-dimensional image according to image information corresponding to a preset target object, and recording the position information of the target object in the three-dimensional image when the target object exists in the three-dimensional image.
3. The millimeter wave human imaging security inspection processing system of claim 2, wherein the target comprises at least one of: gun, metal cutter, ceramic cutter, explosive, inflammable and explosive liquid, jelly, electronic equipment and drugs;
the recognition module pre-trains the target object based on a deep learning algorithm so as to obtain the target object detection model after training.
4. The millimeter wave human imaging security check processing system according to claim 1, wherein the data processor comprises a control unit and a GPU acceleration unit;
the control unit is used for controlling the switch antenna array and the servo driving mechanism to drive;
the GPU acceleration unit is used for carrying out three-dimensional reconstruction on echo signals received by the switch antenna array based on a synthetic aperture radar imaging algorithm so as to form a three-dimensional image corresponding to the detected human body.
5. The millimeter wave human imaging security inspection processing system of claim 1, further comprising: the communication unit and the industrial personal computer terminal;
the data processor is arranged in the industrial personal computer terminal, and the communication unit is used for data communication between the data processor, the servo driving mechanism and the switch antenna array.
6. The millimeter wave human imaging security check processing system of claim 5, wherein the communication unit comprises a TCP/IP module and a serial port module, wherein the serial port module is used for data communication between the data processor and the servo drive mechanism, and the TCP/IP module is used for data communication between the data processor and the switch antenna array.
7. The millimeter wave human imaging security inspection processing system of claim 1, further comprising: the identity recognition unit is used for collecting identity document information of the security personnel and transmitting the identity document information to the data processor; the data processor is also used for verifying the identity document information;
and/or, the millimeter wave human body imaging security check processing system further comprises: the image acquisition unit is used for acquiring the portrait information of the security personnel and transmitting the portrait information to the data processor.
8. The millimeter wave human imaging security inspection processing system according to claim 7, wherein the identity recognition unit and the data processor are in data communication based on a USB protocol;
and/or the image acquisition unit and the data processor are in data communication based on a TCP/IP protocol.
9. The millimeter wave human imaging security inspection processing system of claim 1, further comprising: the ultrasonic sensor is used for detecting whether the person to be inspected reaches the designated position or not, and sending a security check signal to the data processor when judging that the person to be inspected reaches the designated position; and the data processor controls the servo driving mechanism and the switch antenna array to perform millimeter wave three-dimensional imaging on the security personnel under the triggering of the security signal.
10. The millimeter wave human imaging security inspection processing system of claim 1, further comprising: an indication unit for indicating security information, the indication unit comprising at least one of the following indication devices: the device comprises a power supply indicator lamp, an operation indicator lamp, an alarm lamp, an illuminating lamp and a sound module; the data processor controls the indication unit based on an IO control protocol.
11. A millimeter wave human body imaging security check processing method, which is characterized in that the millimeter wave human body imaging security check processing method is applied to the millimeter wave human body imaging security check processing system of any one of claims 1-10, and comprises the following steps:
when the security personnel are detected to be located at the preset position, the data processor controls the horizontally arranged switch antenna array to perform beam scanning so as to obtain echo signals of the security personnel in the horizontal direction;
the data processor controls the servo driving mechanism to drive the switch antenna array to move in the vertical direction and controls the switch antenna array to scan the wave beam so as to obtain an echo signal of a person to be checked in the vertical direction;
and the data processor performs three-dimensional reconstruction on the echo signals received by the switch antenna array based on a synthetic aperture radar imaging algorithm so as to form a three-dimensional image corresponding to the security personnel.
12. A millimeter wave human imaging security check meter, comprising:
the door-shaped body is used for accommodating security personnel;
the millimeter wave human imaging security inspection processing system of any one of claims 1-10;
the switch antenna arrays are respectively arranged in the frames at the two sides of the door-shaped body along the horizontal direction, and the switch antenna arrays move in the vertical direction in the frames under the driving of the servo driving mechanism.
CN202310172004.7A 2023-02-24 2023-02-24 Millimeter wave human body imaging security check processing system and method and security check instrument Pending CN116165723A (en)

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CN202310172004.7A CN116165723A (en) 2023-02-24 2023-02-24 Millimeter wave human body imaging security check processing system and method and security check instrument

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CN202310172004.7A CN116165723A (en) 2023-02-24 2023-02-24 Millimeter wave human body imaging security check processing system and method and security check instrument

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CN116165723A true CN116165723A (en) 2023-05-26

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