阅读说明：本技术 一种基于太赫兹和毫米波弧形天线阵列的主动式安检仪 (Active security check instrument based on terahertz and millimeter wave arc antenna array ) 是由 龚晓凌 谌敦强 孟祥新 王健 柳桃荣 姚武生 屈浩 谭名昇 刘海建 刘扬 于 2020-03-27 设计创作，主要内容包括：本发明公开了一种基于太赫兹和毫米波弧形天线阵列的主动式安检仪,属于安检仪技术领域,包括结构组件、成像处理组件、伺服驱动组件与连接组件,所述结构组件包括顶部框架、底部框架与至少四个支撑柱,所述支撑柱两两对称设置。本发明与平面扫描方式的太赫兹和毫米波人体安检设备相比,弧形天线阵列覆盖的水平方向角度足够大,避免了人体安检时身体两侧的检测盲区；与圆柱扫描方式的太赫兹和毫米波人体安检设备相比,减少了收发天线单元的个数,也减少了设备的成本和重量,而且更符合椭圆体的人体外形；同时由于第一、第二太赫兹/毫米波段收发机为直线运动,而在圆柱扫描方式的设备中是圆弧运动,机械设计更为简单,系统的稳定性更高。(The invention discloses an active security check instrument based on terahertz and millimeter wave arc-shaped antenna arrays, which belongs to the technical field of security check instruments and comprises a structural component, an imaging processing component, a servo driving component and a connecting component, wherein the structural component comprises a top frame, a bottom frame and at least four supporting columns, and the supporting columns are arranged in a pairwise symmetry manner. Compared with terahertz and millimeter wave human body security inspection equipment in a plane scanning mode, the angle of the arc-shaped antenna array in the horizontal direction is large enough, and detection blind areas on two sides of a human body are avoided during human body security inspection; compared with terahertz and millimeter wave human body security inspection equipment in a cylindrical scanning mode, the terahertz and millimeter wave human body security inspection equipment has the advantages that the number of the receiving and transmitting antenna units is reduced, the cost and the weight of the equipment are reduced, and the appearance of an ellipsoid is better met; meanwhile, the first terahertz/millimeter waveband transceiver and the second terahertz/millimeter waveband transceiver move linearly and move in a circular arc mode in equipment in a cylindrical scanning mode, so that the mechanical design is simpler, and the stability of the system is higher.)

1. An active security check appearance based on terahertz and millimeter wave arc antenna array which characterized in that: the terahertz/millimeter wave band transceiver imaging device comprises a structural component, an imaging processing component, a servo driving component and a connecting component, wherein the structural component comprises a top frame, a bottom frame and at least two supporting columns, the supporting columns are symmetrically arranged, the top frame is connected with the bottom frame through the supporting columns, the bottom frame and the supporting columns form a cylindrical space for a person to be detected to stand and pass through, the imaging processing component comprises at least two terahertz/millimeter wave band transceivers, the terahertz/millimeter wave band transceivers are respectively connected with the supporting columns, the terahertz/millimeter wave band transceivers are symmetrically distributed on two sides of the cylinder, the servo driving component is respectively connected with the terahertz/millimeter wave band transceivers through the connecting component, and the servo driving component drives the terahertz/millimeter wave band transceivers to scan along the vertical direction, the terahertz/millimeter wave band transceiver comprises an arc-shaped antenna array and a transceiver body, wherein the arc-shaped antenna array is used for eliminating a human body side imaging blind area, the terahertz/millimeter wave band transceiver is arranged on the transceiver body and is movably connected with the transceiver body, and the coverage angle in the arc-shaped antenna array is determined by a specific use scene.

2. The active security check instrument based on the terahertz and millimeter wave arc antenna arrays as claimed in claim 1, wherein: the imaging processing assembly further comprises a real-time imaging processor, a touch display and an upper computer, wherein the real-time imaging processor is used for receiving terahertz and millimeter wave signals received by the terahertz/millimeter wave band transceiver, the touch display and the upper computer are used for displaying terahertz and millimeter wave images and target identification results, the real-time imaging processor is arranged on the top frame, the installation position of the touch display is determined according to use requirements, and the real-time imaging processor is in communication connection with the upper computer.

3. The active security check instrument based on the terahertz and millimeter wave arc antenna arrays as claimed in claim 2, characterized in that: the terahertz/millimeter wave band transceiver further comprises a frequency synthesizer used for generating signals required by the security check instrument, the frequency synthesizer is arranged on the top frame, and the upper computer is connected with the frequency synthesizer through a standard communication interface.

4. The active security check instrument based on the terahertz and millimeter wave arc antenna arrays as claimed in claim 1, wherein: coupling assembling includes guide rail and slider, the guide rail sets up on the support column, the slider sets up on the transceiver body, guide rail and transceiver body sliding connection, terahertz/millimeter wave band transceiver is followed guide rail direction up-and-down motion is treated the personnel of examining and is scanned.

5. The active security check instrument based on the terahertz and millimeter wave arc antenna arrays as claimed in claim 4, wherein: coupling assembling still includes flexible connectors and synchronous gear area, the bottom of transceiver body is passed through flexible connectors with bottom frame swing joint, the both ends in synchronous gear area respectively with be located both sides the top of transceiver body is connected.

6. The active security check instrument based on the terahertz and millimeter wave arc antenna arrays as claimed in claim 5, wherein: the servo drive assembly comprises a servo motor and a servo driver for controlling the servo motor, the servo motor and the servo driver are arranged on the top frame, the synchronous gear belt is in meshed transmission with an output shaft of the servo motor, and the servo motor drives the synchronous gear belt to move so as to drive the terahertz/millimeter waveband transceiver located on two sides to move up and down for scanning.

7. The active security check instrument based on the terahertz and millimeter wave arc antenna arrays as claimed in claim 6, wherein: coupling assembling still including being used for connecting the synchronous pulley of synchronous gear area, synchronous pulley sets up on servo motor's the output shaft.

8. The active security check instrument based on the terahertz and millimeter wave arc antenna arrays as claimed in claim 1, wherein: in the scanning process of a person to be detected, the terahertz/millimeter wave band transceivers positioned on two sides respectively transmit terahertz and millimeter waves of different frequency bands, and the terahertz/millimeter wave band transceivers positioned on two sides adopt a working mode of simultaneous working.

9. The active security check instrument based on the terahertz and millimeter wave arc antenna arrays as claimed in claim 1, wherein: in the scanning process of a person to be detected, the terahertz/millimeter wave band transceivers positioned on two sides respectively transmit terahertz and millimeter waves of the same frequency band, and the terahertz/millimeter wave band transceivers positioned on two sides adopt an alternative working mode.

10. The active security check instrument based on the terahertz and millimeter wave arc antenna arrays as claimed in claim 1, wherein: the quantity of support column is two sets ofly, and every group includes two, two sets of the support column symmetry sets up, and two liang of being relative the support column forms the entry and the export of active security check appearance respectively, the central point of bottom frame puts and is provided with the region of standing, and entry, export and the region of standing form the security check passageway.

Technical Field

The invention relates to the technical field of security check instruments, in particular to an active security check instrument based on terahertz and millimeter wave arc antenna arrays.

Background

The urgent need of international anti-terrorism situation puts forward various new requirements on human body security inspection, and firstly, non-contact three-dimensional holographic imaging detection needs to be carried out on articles shielded by human clothes so as to improve the identification rate of suspicious targets such as dangerous articles, contraband articles and the like and reduce the omission ratio; secondly, the detection capability needs to be expanded, and non-metallic objects such as ceramic, plastic, paper, powder, liquid and the like are detected besides the metal target, wherein the non-metallic objects comprise guns, cutters, explosives, drugs, compact discs, cash, liquid, chips, ceramic and the like; and thirdly, the product is safe and harmless and does not cause harm to human health to meet the requirements of national and industrial standards and specifications.

The metal detector comprises a metal security check door and a handheld metal detector, the security check mode of the metal security check instrument is that a person to be checked passes through the metal security check door first, when a hidden metal object is found, the metal door can send out alarm sound, and a corresponding indicator lamp flickers. The staff again detects the human body with hand-held type metal detector and hand touch mode. One of such detection methods is: only hidden metal objects can be detected, and nonmetal contraband articles such as ceramics, powder, liquid and the like cannot be detected, so that great hidden danger is brought to security work; the second step is as follows: the private parts of people can be touched, and misunderstanding and conflict can be generated; and thirdly: the main body parts of each person to be examined need to be stooped down to carefully examine, and the workload of workers is very large.

In recent years, the detection of metal and non-metal objects can be realized by the aid of an X-ray human body security check instrument with low radiation dose internationally, and the X-ray human body security check instrument is not accepted by the public due to the fact that the X-ray human body security check instrument is harmful to ionizing radiation of human bodies and is difficult to popularize and use in daily security check.

The terahertz and millimeter wave wavelength is 30-10 mm, the microwave and millimeter wave wavelength is between the microwave and the infrared ray, the terahertz and millimeter wave wavelength can penetrate through clothes, the passive security inspection instrument utilizes the temperature difference between a human body and a carried article to carry out imaging, the imaging resolution is in the centimeter level, the terahertz and millimeter wave wavelength is one order of magnitude lower than the resolution of active imaging, and the terahertz and millimeter wave wavelength is different from the requirement of a user.

The active security check instrument transmits terahertz and millimeter wave signals to a person to be checked, the signals penetrate through fabrics such as clothes and the like, the signals are reflected back to the receiving antenna after contacting with the skin, a high-resolution image of an object hidden under the clothes can be obtained through processing, and the detected object can be well distinguished and identified. A part of terahertz and millimeter wave signals radiated to a human body are absorbed by subcutaneous fat after contacting the skin, no ionizing radiation exists, the energy radiated to the human body is far lower than the national standard requirement, the radiation is less than one thousandth of mobile phone radiation, and the terahertz and millimeter wave signals are absolutely safe to the human body.

However, the current active security check instrument works in a mode of flat scanning and cylindrical surface scanning, and a linear array works in a mode of one-dimensional electronic scanning and mechanical scanning or a planar array works in a mode of two-dimensional electronic scanning. The beam direction of the antenna of the plane scanning security check instrument is always vertical to the array surface, the two antennas can only image the front and back targets of the human body, the two sides of the human body cannot be irradiated, and a large blind area can exist. Two antenna arrays hung on the cylindrical scanning security inspection instrument horizontally scan in two circular arc sectors, and are not matched with the trunk of the human ellipsoid; the height of the cylindrical scanning antenna array is generally designed to be 2 meters and matched with the limit height of a human body, the length of the antenna of the cylindrical surface security check instrument is long, the number of units is large, the system is more complex, the cost is doubled, and the weight is larger. Therefore, an active security check instrument based on terahertz and millimeter wave arc antenna arrays is provided.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: how to make active security check appearance and human appearance more match to make security check work become more high-speed high-efficient, provide an active security check appearance based on terahertz and millimeter wave arc antenna array now.

The invention solves the technical problems by the following technical scheme, the invention comprises a structural component, an imaging processing component, a servo driving component and a connecting component, wherein the structural component comprises a top frame, a bottom frame and at least two supporting columns, the supporting columns are symmetrically arranged, the top frame is connected with the bottom frame through the supporting columns, the top frame, the bottom frame and the supporting columns form a cylindrical space for a person to be detected to stand and pass through, the imaging processing component comprises at least two terahertz/millimeter waveband transceivers, the terahertz/millimeter waveband transceivers are respectively connected with the supporting columns, the terahertz/millimeter waveband transceivers are symmetrically distributed on two sides of the cylindrical space, the servo driving component is respectively connected with the terahertz/millimeter waveband transceivers through the connecting component, the terahertz/millimeter wave band transceiver is driven by the servo driving assembly to scan along the vertical direction and comprises an arc-shaped antenna array and a transceiver body, the arc-shaped antenna array is used for eliminating a human body side imaging blind area, the terahertz/millimeter wave band transceiver is arranged on the transceiver body and is movably connected with the transceiver body, and the coverage angle in the arc-shaped antenna array is determined by a specific use scene.

Furthermore, the imaging processing assembly further comprises a real-time imaging processor for receiving terahertz and millimeter wave signals received by the terahertz/millimeter wave band transceiver, a touch display and an upper computer for displaying and processing terahertz and millimeter wave images and target identification results, the real-time imaging processor and the upper computer are all arranged on the top frame, the installation position of the touch display is determined according to the use requirement so as to be convenient to use as the principle, and the real-time imaging processor is in communication connection with the upper computer. And during security inspection, a security inspection operator clicks a button on the touch display, and the upper computer distributes a control instruction to the frequency synthesizer, the real-time imaging processor and the servo driver.

Furthermore, the terahertz/millimeter wave band transceiver further comprises a frequency synthesizer used for generating signals required by the security check instrument, the frequency synthesizer is arranged on the top frame, and the upper computer is connected with the frequency synthesizer through a standard communication interface.

Further, coupling assembling includes guide rail and slider, the guide rail sets up on the support column, the slider sets up on the transceiver body, guide rail and transceiver body sliding connection, terahertz/millimeter wave band transceiver is followed the guide rail direction up-and-down motion is treated the personnel of examining and is scanned. The specifications of the guide rail and the slide block are not limited, and the terahertz/millimeter wave band transceiver can be ensured to carry out horizontal symmetrical scanning.

Furthermore, coupling assembling still includes flexible connectors and synchronous gear area, the bottom of transceiver body is passed through flexible connectors with bottom frame swing joint, the both ends in synchronous gear area respectively with be located both sides the top of transceiver body is connected. Under the drive of the servo motor, the terahertz/millimeter wave band transceivers positioned on two sides can scan in the horizontal direction from top to bottom on one side and scan in the horizontal direction from bottom to top on the other side.

Furthermore, the servo drive assembly comprises a servo motor and a servo driver for controlling the servo motor, the servo motor and the servo driver are all arranged on the top frame, the synchronous gear belt is in meshed transmission with an output shaft of the servo motor, and the servo motor drives the synchronous gear belt to move so as to drive the terahertz/millimeter waveband transceiver located on two sides to move up and down for scanning.

Furthermore, coupling assembling still includes the synchronous pulley who is used for connecting the synchromesh area, synchronous pulley sets up on servo motor's the output shaft.

Furthermore, in the process of scanning the person to be detected, the terahertz/millimeter wave band transceivers positioned on two sides respectively transmit terahertz and millimeter waves of different frequency bands, and the terahertz/millimeter wave band transceivers positioned on two sides adopt a working mode of working simultaneously. The terahertz/millimeter wave transceiver has higher replaceability due to the alternative working mode, and the complexity of software and hardware of the terahertz/millimeter wave transceiver is reduced.

Furthermore, in the process of scanning the person to be detected, the terahertz/millimeter wave band transceivers positioned on two sides respectively transmit terahertz and millimeter waves of the same frequency band, and the terahertz/millimeter wave band transceivers positioned on two sides adopt an alternative working mode. The simultaneous working mode can increase the scanning speed in case the mechanical structure is sufficiently stable and the computational resources are sufficient.

Furthermore, the quantity of support column is two sets of, and every group includes two, two sets of the support column symmetry sets up, and two liang of relative the support column forms the entry and the export of active security check appearance respectively, the central point of bottom frame puts and is provided with the district of standing, and entry, export and the district of standing form the security check passageway.

Compared with the prior art, the invention has the following advantages: compared with terahertz and millimeter wave human body security inspection equipment in a planar scanning mode, the active security inspection instrument based on the terahertz and millimeter wave arc-shaped antenna arrays has the advantages that the angle of the arc-shaped antenna arrays in the horizontal direction is large enough, and detection blind areas on two sides of a human body during human body security inspection are avoided; compared with terahertz and millimeter wave human body security inspection equipment in a cylindrical scanning mode, the terahertz and millimeter wave human body security inspection equipment has the advantages that the number of the receiving and transmitting antenna units is reduced, the cost and the weight of the equipment are reduced, and the terahertz and millimeter wave human body security inspection equipment is more in line with the ellipsoidal human body structure; meanwhile, the first terahertz/millimeter waveband transceiver and the second terahertz/millimeter waveband transceiver move linearly and move in a circular arc mode in equipment in a cylindrical scanning mode, so that the mechanical design is simpler, and the stability of the system is higher.

Drawings

Fig. 1 is a schematic structural diagram of an active security inspection apparatus based on terahertz and millimeter wave arc antenna arrays according to a second embodiment and a third embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first arc antenna array of an active security device based on terahertz and millimeter wave arc antenna arrays in the second and third embodiments of the present invention.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.