A security inspection system based on distributed transmission signal source

Abstract

The present invention relates to the technical field of security inspection systems, and specifically to a security inspection system based on a distributed transmission signal source, comprising an expandable frame structure, a signal processing terminal, a power management terminal, a display terminal, and a plurality of basic security inspection units. The basic security inspection units are detachably mounted on the expandable frame structure, and the display terminal and the basic security inspection units are respectively communicated with the signal processing terminal. The signal processing terminal is used to control the coordination of the scanning actions of the basic security inspection units, receive data collected by the basic security inspection units, and perform imaging processing on the data; the power management terminal is used to distribute and supply power to the basic security inspection units. The security inspection system of the present invention significantly reduces the additional requirements and difficulty of construction conditions in responding to sudden emergency security inspections, especially in scenarios with limited conditions. There is no need to customize the development of additional high and low frequency modules required for the corresponding scenarios, and security inspection scenarios of any scale can be quickly constructed according to scenario requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of security inspection systems, and in particular to a security inspection system based on a distributed transmission signal source. Background Art

[0002] Safety inspections examine the implementation of safety laws and regulations on construction projects, their safety status, working conditions, and potential accidents. These inspections primarily focus on examining employee ideology, systems, machinery and equipment, safety and sanitation facilities, safety education and training, personnel behavior, the use of protective equipment, and the handling of casualties. Ports generally employ four types of security inspection methods: First, X-ray screening equipment primarily checks passengers' luggage. After passing inspection, staff affix a "XX Airport Baggage Security" sticker to the luggage before it can be checked in or carried on board. Second, detection gates conduct physical inspections, primarily to check for prohibited items. Third, magnetic detectors, also known as handheld detectors, are used for close-up inspections of passengers. Fourth, manual inspections involve security staff manually searching passengers' luggage and conducting body searches by male and female inspectors.

[0003] In some emergency scenarios, if a large number of people suddenly gather, risk control is required. There are random and sudden identification of high-risk individuals in high-density places (such as shopping malls, stadiums, and convention and exhibition centers), and mobile inspections in high-value places (such as gold mines). It is usually necessary to build a security inspection system with fast speed, flexible configuration of security inspection environment, and low demand for additional support resources to meet emergency needs. However, in existing security inspection systems, such as the one disclosed in Chinese patent publication No. CN111239847A, a contactless intelligent security inspection system includes station security inspection equipment installed at multiple sites and a security inspection and security information processing service platform serving multiple station security inspection equipment. In addition to the basic security inspection equipment at each station security inspection point, this invention sets up personnel security inspection, item security inspection, security inspection business monitoring equipment and security inspection business information equipment. By adding an artificial intelligence-based security inspection analysis process, normal passengers at each station can be intelligently and contactlessly inspected and items can be inspected. While improving security inspection safety and efficiency, it can minimize manual operations. However, the security inspection system needs to be set up in advance, and due to its complexity, it has strict requirements on the construction environment and cannot be used for rapid processing of sudden emergency scenarios.

[0004] To this end, the present invention provides a security inspection system based on a distributed transmission signal source that can quickly build security inspection scenes of any scale according to scene requirements. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a security inspection system based on a distributed transmission signal source. The system can be infinitely expanded in length and height directions by utilizing an extensible frame structure, so as to realize flexible and rapid construction of security inspection channels. At the same time, by integrating the CPLD logic module on the control module of the basic security inspection unit, and by solidifying the standard sending and receiving actions of a single basic security inspection unit during scanning into the CPLD, the signal processing terminal only needs a small amount of trigger and control signals to realize the coordination of the scanning actions of the basic security inspection unit; and the above measures make the external interface of the entire basic security inspection unit low-frequency, digital, simplified and standardized, and in subsequent expanded applications, especially in scenarios with limited conditions, the additional requirements and construction difficulty for construction conditions are significantly reduced. There is no need to customize the development of additional high and low frequency modules required for the corresponding scenario, and security inspection scenarios of any scale can be quickly constructed according to scenario requirements.

[0006] The object of the present invention is achieved through the following technical solutions:

[0007] A security inspection system based on a distributed transmission signal source includes an expandable frame structure, a signal processing terminal, a power management terminal, a display terminal and multiple basic security inspection units. The basic security inspection units are used for electric scanning security inspection and are detachably mounted on the expandable frame structure. The display terminal and the basic security inspection units are respectively communicated with the signal processing terminal. The signal processing terminal is used to control the coordination of the scanning actions of the basic security inspection units, receive data collected by the basic security inspection units, and perform imaging processing on the data. The basic security inspection units are connected to the power management terminal, and the power management terminal is used to distribute and supply power to the basic security inspection units.

[0008] Furthermore, the basic security inspection unit is a 32-channel fully electrically scanned two-dimensional sparse array for transmitting and receiving, and a distributed signal source is integrated on the substrate of the basic security inspection unit, and the distributed signal source is used to transmit signals and receive local oscillators.

[0009] Furthermore, a control module is provided on the substrate, the distributed signal source is connected to the control module, and a CPLD logic module is integrated on the control module.

[0010] Furthermore, the basic security inspection unit includes a substrate and four transceiver unit groups arranged on the substrate, the transceiver unit groups are arranged in a 2×2 array, the transceiver unit groups include two rows of transmitting units and two columns of receiving units, the two rows of transmitting units and the two columns of receiving units are arranged in a U-shaped array, each row of transmitting units is adjacent to a multi-channel transmitting SPQT module, the transmitting units in the row are respectively connected to the SPQT modules, the SPQT modules are arranged on the outside of the U-shaped array, each column of receiving units is adjacent to a multi-channel receiving module, the receiving units in the column are respectively connected to the multi-channel receiving module, and the multi-channel receiving module is arranged on the inside of the U-shaped array.

[0011] Furthermore, the transmitting unit, receiving unit, transmitting SPQT module and receiving module are respectively arranged on the front end side of the substrate.

[0012] Furthermore, each row of transmitting units includes four transmitting units, each column of receiving units includes four receiving units, the transmitting SPQT module is a four-channel transmitting SPQT module, and the receiving module is a four-channel receiving module. In one transceiver unit group, eight receiving units form two symmetrically arranged linear arrays of receiving units in the y-axis direction, and eight transmitting units form two symmetrically arranged linear arrays of transmitting units in the x-axis direction. The four transceiver unit groups are then arranged in an array, thereby forming a 32-transceiver channel active array antenna on the substrate plane. The transmitting units operate using time-division switching, and a four-channel transmitting SPQT module is used to form a switching network. That is, at the final stage of the transmitting unit, each SPQT module corresponds to four transmitting channels, while the receiving units operate simultaneously, using a four-channel receiving module for receive amplification and frequency conversion processing.

[0013] Furthermore, in a row of transmitting units, the spacing between adjacent transmitting units is D, and in a transceiver unit group, the spacing between the geometric centers of two rows of transmitting units is 4D; in a column of receiving units, the spacing between adjacent receiving units is D, and in a transceiver unit group, the spacing between the geometric centers of two columns of receiving units is 4D.

[0014] Furthermore, the spacing between the geometric centers of adjacent transceiver unit groups is 8D. In an active electronically scanned array antenna, the spacing between two adjacent rows of transmitting units in the same column is 4D, and the spacing between two adjacent columns of receiving units in the same row is 4D.

[0015] Furthermore, the value of D is the working center frequency of the active electronically scanned array antenna corresponding to one times the wavelength of the free space electromagnetic wave.

[0016] Furthermore, in each transceiver unit group, with the midpoint of the transceiver unit group as the origin, two columns of receiving units are symmetrically arranged on both sides of the y-axis, and two rows of transmitting units are symmetrically arranged on both sides of the x-axis.

[0017] Furthermore, the two receiving modules are symmetrically arranged on both sides of the y-axis, and the two transmitting SPQT modules are symmetrically arranged on both sides of the x-axis.

[0018] Furthermore, the receiving module and the transmitting SPQT module are mounted on the surface of the substrate. Preferably, the receiving module and the transmitting SPQT module are mounted on the surface of the circuit substrate using a BGA or QFN surface mounting process, and the receiving unit radiation circuit and the transmitting unit radiation circuit are integrated on the circuit substrate. By mounting the receiving module and the transmitting SPQT module on the surface of the circuit substrate using a BGA or QFN surface mounting process, and integrating the receiving unit radiation circuit and the transmitting unit radiation circuit on the circuit substrate, micro-assembly processes such as high-frequency chip bonding and gold wire bonding in the manufacturing process are avoided, the requirements for process conditions during the assembly process are reduced, the assembly process is simplified, the assembly efficiency is improved, and the manufacturing cost is reduced.

[0019] Furthermore, an external interface is provided on the substrate.

[0020] Furthermore, the external interface includes a DC power feed interface, a digital communication interface, an analog intermediate frequency interface and a reference source input interface.

[0021] Furthermore, a control module is provided on the substrate, and the transmitting SPQT module, receiving module, and external interface are respectively connected to the control module.

[0022] Furthermore, the security inspection system further includes an alarm module, which is connected to the signal processing terminal and is used to issue warning information.

[0023] Furthermore, the warning information is at least one of light and sound warning information.

[0024] Furthermore, the power management terminal is connected to a power source.

[0025] Furthermore, the expandable frame structure includes a lower fixing member, an upper fixing member, multiple lower connecting members, and multiple upper connecting members. The lower fixing member is arranged in parallel with the upper fixing member, the lower connecting members are evenly arranged above the lower fixing member, and the bottom end of the lower connecting member is detachably connected to the lower fixing member. The upper connecting members are evenly arranged below the upper fixing member, and the top end of the upper connecting member is detachably connected to the upper fixing member. The lower connecting members and the upper connecting members are arranged in a one-to-one correspondence, and at least one extension member is arranged between the lower connecting member and the upper connecting member, and the two ends of the extension member are respectively detachably connected to the top end of the lower connecting member and the bottom end of the upper connecting member.

[0026] Furthermore, the basic security inspection unit can be detachably mounted on the extension piece.

[0027] Furthermore, a magnetic connector A is provided on the rear end sidewall of the base plate, and a magnetic connector B is provided on the extension member. These magnetic connectors A and B constitute a magnetic connection assembly, and through the cooperation of the magnetic connection assembly, the basic security inspection unit can be removably attached to the extension member. Preferably, one of the magnetic connectors A and B is a permanent magnet and the other is an iron member, or the magnetic connectors A and B are two permanent magnets that are magnetically attracted to each other.

[0028] Furthermore, the extension pieces are connected in sequence from bottom to top, and two adjacent extension pieces are detachably connected.

[0029] Furthermore, the lower connecting member includes a lower connecting fixed portion and a lower connecting rotating portion, the lower connecting fixed portion and the lower connecting rotating portion are rotatably connected, the bottom of the lower connecting fixed portion is detachably connected to the lower fixing member, and the top of the lower connecting rotating portion is detachably connected to the bottom of the bottommost extension member.

[0030] Furthermore, the bottom of the lower connecting and fixing portion is threadedly connected to the lower fixing piece. Preferably, the top of the lower fixing piece is evenly provided with a plurality of internal thread holes, and the bottom of the lower connecting and fixing portion is provided with external threads matching the internal thread holes.

[0031] Furthermore, the upper connecting member includes an upper connecting fixed portion and an upper connecting rotating portion, the upper connecting fixed portion and the upper connecting rotating portion are rotatably connected, the top of the upper connecting fixed portion is detachably connected to the upper fixing member, and the bottom of the lower connecting rotating portion is detachably connected to the top of the topmost extension member.

[0032] Furthermore, the top of the upper connecting and fixing portion is threadedly connected to the upper fixing piece. Preferably, the bottom of the upper fixing piece is evenly provided with a plurality of internal thread holes, and the top of the upper connecting and fixing portion is provided with external threads matching the internal thread holes.

[0033] Furthermore, the bottom of the extension piece and the bottom of the upper connecting rotating part are respectively provided with fixing clamps, and the top of the extension piece and the top of the lower connecting rotating part are respectively provided with fixing slots, and the fixing slots match the fixing clamps.

[0034] Furthermore, the fixing member is provided with an external thread, and the fixing slot is provided with an internal thread matching the external thread.

[0035] Furthermore, a positioning hole is provided on the fixing card, a first positioning component is provided on the outer side wall of the fixing slot, and a through hole is provided on the side wall of the fixing slot, the first positioning component includes a protective shell, an elastic member, a limiting member and a first positioning member, the protective shell and the through hole are correspondingly arranged on the outer side wall of the fixing slot, the elastic member and the limiting member are arranged in the protective shell, one end of the elastic member is connected to the inner wall of the protective shell away from the through hole, and the other end of the elastic member is connected to the limiting member, without considering the constraint condition of the elastic member, the limiting member can move freely along the axial direction of the through hole in the protective shell; a part of the first positioning member is arranged in the fixing slot, and the other part of the first positioning member passes through the through hole and is connected to the limiting member, and the positioning hole matches the first positioning member.

[0036] Furthermore, for the lower connecting member, the first positioning assembly of the lower connecting member is arranged on the side wall of the lower connecting rotating portion; for the extending member, the first positioning assembly of the extending member is arranged on the top side wall of the extending member.

[0037] Furthermore, a positioning groove is provided on the bottom side wall of the lower connecting rotating part, and a second positioning assembly is provided on the top side wall of the lower connecting fixed part. The second positioning assembly includes a second positioning piece, and the bottom of the second positioning piece is hinged to the lower connecting fixed part. When the second positioning piece is directly below the positioning groove, the top of the second positioning piece can be rotated into the positioning groove to constrain the lower connecting rotating part so that the lower connecting rotating part cannot rotate.

[0038] Furthermore, the second positioning assembly further includes a retractable member with a locking function, the retractable member being disposed on the top of the second positioning member. A locking hole is provided on the top inner wall of the positioning slot, and the locking hole mates with the retractable member. When the second positioning member is rotated so that the top of the second positioning member rotates into the positioning slot, the retractable member is controlled to extend and extend into the locking hole. The locking hole then constrains the second positioning member connected to the retractable member, allowing the second positioning member to remain continuously within the positioning slot, thereby achieving stable restraint on the lower connecting rotating portion.

[0039] The beneficial effects of the present invention are as follows: the security inspection system based on the distributed transmission signal source of the present invention can be infinitely expanded in the length and height directions by utilizing an extensible frame structure, thereby realizing flexible and rapid construction of security inspection channels. By adopting a distributed signal source, the external interface of the basic unit does not contain a millimeter wave signal interface, thereby reducing the design and implementation difficulty of the entire board in the millimeter wave frequency band. At the same time, by integrating the CPLD logic module on the control module of the basic security inspection unit, and by solidifying the standard sending and receiving actions of a single basic security inspection unit during scanning into the CPLD, the signal processing terminal only needs a small amount of trigger and control signals to realize the coordination of the scanning actions of the basic security inspection unit, and further simplifies the complexity of the digital interface. Moreover, the above measures make the external interface of the entire basic security inspection unit low-frequency, digital, simplified and standardized, and in subsequent expansion applications, especially in scenarios with limited conditions, significantly reduce the additional requirements and construction difficulty for construction conditions, and do not need to customize the development of additional high and low frequency modules required for the corresponding scenario, and can quickly build security inspection scenarios of any scale according to scenario requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Schematic diagram of the structure of the security inspection system of the present invention;

[0041] Figure 2 This is a front view of the substrate security inspection unit of the present invention;

[0042] Figure 3 It is a rear view of the substrate security inspection unit of the present invention;

[0043] Figure 4 It is a structural schematic diagram of the lower fixing member of the present invention;

[0044] Figure 5 It is a structural schematic diagram of the upper fixing member of the present invention;

[0045] Figure 6 Schematic diagram of the connection structure of the lower connecting member, the extension member and the upper connecting member of the present invention;

[0046] Figure 7 It is a structural schematic diagram of the lower connecting member of the present invention;

[0047] Figure 8 is a cross-sectional view of the lower connecting member of the present invention;

[0048] Figure 9 It is a structural schematic diagram of the upper connecting member of the present invention;

[0049] Figure 10 It is a structural schematic diagram of the extension member of the present invention;

[0050] In the figure, 1. Scalable framework structure;

[0051] 101. Lower fixing member; 1011. First expansion card; 1012. First expansion notch;

[0052] 102. Upper fixing member; 1021. Second expansion clamp; 1022. Second expansion notch;

[0053] 103, lower connecting member; 1031, lower connecting fixed portion; 1032, lower connecting rotating portion; 1033, second positioning member; 1034, positioning groove; 1035, telescopic member; 1036, clamping hole;

[0054] 104, upper connecting member; 1041, upper connecting fixed portion; 1042, upper connecting rotating portion;

[0055] 105. Extension piece; 1051. Magnetic connector B

[0056] 106, fixing card; 107, fixing card slot; 108, positioning hole;

[0057] 109, first positioning component; 1091, protective shell; 1092, elastic member; 1093, limiting member; 1094, first positioning member;

[0058] 2. Signal processing terminal;

[0059] 3. Power management terminal;

[0060] 4. Display terminal;

[0061] 5. Basic security inspection unit; 501. Baseboard; 502. Transceiver unit group; 503. Transmitter unit; 504. Receiving unit; 505. SPQT module; 506. Receiving module; 507. Control module; 508. External interface; 509. Magnetic connector A. DETAILED DESCRIPTION

[0062] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0063] like Figures 1 to 10As shown, a security inspection system based on a distributed transmission signal source includes an expandable frame structure 1, a signal processing terminal 2, a power management terminal 3, a display terminal 4 and multiple basic security inspection units 5. The basic security inspection units 5 are used for electric scanning security inspection. The basic security inspection units 5 are detachably mounted on the expandable frame structure 1. The display terminal 4 and the basic security inspection units 5 are respectively communicated with the signal processing terminal 2. The signal processing terminal 2 is used to control the coordination of the scanning actions of the basic security inspection units 5, receive data collected by the basic security inspection units 5, and perform imaging processing on the data; the basic security inspection units 5 are connected to the power management terminal 3, and the power management terminal 3 is used to distribute and supply power to the basic security inspection units 5. In response to sudden emergency scenarios, such as the need to conduct risk control in the event of a sudden gathering of a large number of people, or the need to identify high-risk individuals in random and sudden situations in high-density places, the expandable frame structure 1 can be quickly assembled according to the size of the actual scene to form a security inspection channel, and basic security inspection units 5 can be mounted on the expandable frame structure 1. Each basic security inspection unit 5 operates independently, and the power management terminal 3 is used to distribute and supply power to the basic security inspection unit 5. The signal processing terminal 2 is used to control the coordination of the scanning actions of the basic security inspection unit 5, receive the data collected by the basic security inspection unit 5, and perform imaging processing on the data. After the imaging processing is completed, the imaging information is displayed by the display terminal 4. Therefore, the flexible and rapid construction of security inspection channels for responding to sudden scenarios can be quickly realized, thereby improving the flexibility and convenience of using the security inspection system.

[0064] Specifically, the basic security inspection unit 5 includes a substrate 501 and four transceiver unit groups 502 arranged on the substrate 501. The transceiver unit groups 502 are arranged in a 2×2 array. The transceiver unit groups 502 include two rows of transmitting units 503 and two columns of receiving units 504. The two rows of transmitting units 503 and the two columns of receiving units 504 are arranged in a U-shaped array. Each row of transmitting units 503 is adjacent to a multi-channel transmitting SPQT module 505. The transmitting units 503 in the row are respectively connected to the SPQT module 505. The SPQT module 505 is arranged on the outside of the U-shaped array. Each column of receiving units 504 is adjacent to a multi-channel receiving module 506. The receiving units 504 in the column are respectively connected to the multi-channel receiving module 506. The multi-channel receiving module 506 is arranged on the inside of the U-shaped array. During the security inspection process, in a transceiver unit group 502, eight receiving units 504 form two symmetrically arranged receiving unit linear arrays in the y-axis direction, and eight transmitting units 503 form two symmetrically arranged transmitting unit linear arrays in the x-axis direction. The four transceiver unit groups 502 are arranged in an array, thereby forming a 32-transceiver channel active array antenna on the plane of the substrate 501. The transmitting unit 503 operates in a time-division switching manner and adopts a four-channel transmitting SPQT module 505 to form a switching network, that is, each SPQT module 505 at the end of the transmitting unit 503 corresponds to four transmitting channels, and all the receiving units 504 work simultaneously, using a four-channel receiving module 505. The receiving module group 506 receives, amplifies, and frequency-converts the signals received by the receiving unit 504. After imaging processing, a three-dimensional image of the scanning area is finally obtained, thereby realizing high-precision perspective security inspection. The transceiver unit group 502 is arranged in a 4*4 U-shaped array, which effectively reduces the array density and the number of channels, thereby reducing the production cost. The SPQT module 505 is arranged on the outside of the U-shaped array, and the receiving module 506 is arranged on the inside of the U-shaped array, which fully utilizes the layout space inside and outside the sparse array surface, and solves the cross-interference problem caused by the layout and routing of the transceiver units on the same side of the circuit substrate 501 surface. This is of great significance to promoting the application of microwave antennas in security inspection.

[0065] Specifically, the transmitting unit 503 , the receiving unit 504 , the transmitting SPQT module 505 and the receiving module 506 are respectively arranged on the front end side surface of the substrate 501 .

[0066] Specifically, each row of transmitting units 503 includes four transmitting units 503, each column of receiving units 504 includes four receiving units 504, the transmitting SPQT module 505 is a four-channel transmitting SPQT module 505, and the receiving module 506 is a four-channel receiving module 506. In one transceiver unit group, eight receiving units 504 form two symmetrically arranged linear arrays of receiving units in the y-axis direction, and eight transmitting units 503 form two symmetrically arranged linear arrays of transmitting units in the x-axis direction. The four transceiver unit groups 502 are further arranged in an array, thereby forming a 32-transceiver channel active array antenna on the plane of the substrate 501. The transmitting units 503 operate using time-division switching, and the four-channel transmitting SPQT modules 505 form a switching network. That is, at the final stage of the transmitting unit, each SPQT module 505 corresponds to four transmitting channels, while the receiving units 504 operate simultaneously, and the four-channel receiving module 506 performs receive amplification and frequency conversion processing.

[0067] Specifically, in a row of transmitting units 503, the spacing between adjacent transmitting units 503 is D, and in a transceiver unit group 502, the spacing between the geometric centers of two rows of transmitting units 503 is 4D; in a column of receiving units 504, the spacing between adjacent receiving units 504 is D, and in a transceiver unit group 502, the spacing between the geometric centers of two columns of receiving units 504 is 4D.

[0068] Specifically, the distance between the geometric centers of adjacent transceiver unit groups 502 is 8D. In an active electronically scanned array antenna, the distance between two adjacent rows of transmitting units 503 in the same column is 4D, and the distance between two adjacent columns of receiving units 504 in the same row is 4D.

[0069] Specifically, the value of D is the working center frequency of the active electronically scanned array antenna corresponding to one times the wavelength of the free space electromagnetic wave.

[0070] Specifically, in each transceiver unit group 502 , with the midpoint of the transceiver unit group 502 as the origin, two columns of receiving units 504 are symmetrically arranged on both sides of the y-axis, and two rows of transmitting units 503 are symmetrically arranged on both sides of the x-axis.

[0071] Specifically, the two receiving modules 506 are symmetrically arranged on both sides of the y-axis, and the two transmitting SPQT modules 505 are symmetrically arranged on both sides of the x-axis.

[0072] Specifically, the receiving module 506 and the transmitting SPQT module 505 are mounted on the surface of the substrate 501. Preferably, the receiving module 506 and the transmitting SPQT module 505 are mounted on the surface of the circuit substrate 501 using a BGA or QFN surface mount packaging process, and the radiation circuit of the receiving unit 504 and the radiation circuit of the transmitting unit 503 are integrated on the circuit substrate 501. By mounting the receiving module 506 and the transmitting SPQT module 505 on the surface of the circuit substrate 501 using a BGA or QFN surface mount packaging process, and integrating the radiation circuit of the receiving unit 504 and the radiation circuit of the transmitting unit 503 on the circuit substrate 501, micro-assembly processes such as high-frequency chip bonding and gold wire bonding in the manufacturing process are avoided, the requirements for process conditions during the assembly process are reduced, the assembly process is simplified, the assembly efficiency is improved, and the manufacturing cost is reduced.

[0073] Specifically, an external interface 508 is provided on the substrate 501 .

[0074] Specifically, the external interface 508 includes a DC power supply interface, a digital communication interface, an analog intermediate frequency interface, and a reference source input interface.

[0075] Specifically, a control module 507 is provided on the substrate 501, and the transmitting SPQT module 505, receiving module 506, and external interface 508 are respectively connected to the control module 507. In a preferred embodiment, the external interface 508 provided on each substrate 501 is a standard digital-to-analog interface of the same type, and the signal processing terminal 2 and the power management terminal 3 are respectively connected to the control module 507 of the basic security inspection unit 5 via high- and low-frequency interconnect cables.

[0076] Specifically, the control module 507 integrates a CPLD logic module. By solidifying the standard sending and receiving actions of a single basic security inspection unit 5 during scanning into the CPLD, the signal processing terminal 2 only needs a small number of trigger and control signals to coordinate the scanning actions of the basic security inspection unit 5. The above measures make the external interface of the entire basic security inspection unit 5 low-frequency, digital, simplified and standardized. In subsequent expanded applications, especially in scenarios with limited conditions, the additional requirements and difficulty of construction conditions are significantly reduced. There is no need to customize the development of additional high and low frequency modules required for the corresponding scenarios, and security inspection scenarios of any scale can be quickly constructed according to scenario requirements.

[0077] Specifically, the security inspection system also includes an alarm module connected to the signal processing terminal 2 and configured to issue warning messages. During operation, the basic security inspection unit 5 performs electronic scanning security inspections, while the signal processing terminal 2 coordinates the scanning actions of the basic security inspection unit 5, receives the data collected by the basic security inspection unit 5, and performs imaging processing on the data. After the imaging processing is completed, the imaging information is displayed on the display terminal 4. When high-risk factors are detected, the alarm module issues corresponding warning messages, providing visual and audible warnings.

[0078] Specifically, the warning information is at least one of light and sound warning information.

[0079] Specifically, the power management terminal 3 is connected to a power source.

[0080] Specifically, the expandable frame structure 1 includes a lower fixing member 101, an upper fixing member 102, multiple lower connecting members 103, and multiple upper connecting members 104. The lower fixing member 101 is arranged parallel to the upper fixing member 102, and the lower connecting members 103 are evenly arranged above the lower fixing member 101. The bottom end of the lower connecting member 103 is detachably connected to the lower fixing member 101, and the upper connecting member 104 is evenly arranged below the upper fixing member 102. The top end of the upper connecting member 104 is detachably connected to the upper fixing member 102, and the lower connecting member 103 and the upper connecting member 104 are arranged in a one-to-one correspondence. At least one extension member 105 is arranged between the lower connecting member 103 and the upper connecting member 104, and the two ends of the extension member 105 are detachably connected to the top end of the lower connecting member 103 and the bottom end of the upper connecting member 104, respectively. By setting an extension piece 105 between the lower connecting piece 103 and the upper connecting piece 104 and controlling the number of the extension pieces 105, the infinite expansion of the expandable frame structure 1 in the height direction can be controlled, making it convenient to flexibly install the security inspection system according to the actual application environment.

[0081] Specifically, the basic security inspection unit 5 can be detachably mounted on the extension piece 105 .

[0082] Specifically, a magnetic connector A509 is provided on the rear end sidewall of the base plate 501, and a magnetic connector B1051 is provided on the extension member 105. The magnetic connector A509 and the magnetic connector B1051 constitute a magnetic connection assembly, and through the cooperation of the magnetic connection assembly, the basic security inspection unit 5 can be detachably mounted on the extension member 105. Preferably, one of the magnetic connector A509 and the magnetic connector B1051 is a permanent magnet and the other is an iron member, or the magnetic connector A509 and the magnetic connector B1051 are two permanent magnets that are magnetically attracted to each other.

[0083] Specifically, the extension pieces 105 are connected in sequence from bottom to top, and two adjacent extension pieces 105 are detachably connected.

[0084] Specifically, the lower connecting member 103 includes a lower connecting fixed portion 1031 and a lower connecting rotating portion 1032, and the lower connecting fixed portion 1031 and the lower connecting rotating portion 1032 are rotatably connected. The bottom of the lower connecting fixed portion 1031 is detachably connected to the lower fixing member 101, and the top of the lower connecting rotating portion 1032 is detachably connected to the bottom of the bottommost extension member 105.

[0085] Specifically, the bottom of the lower connecting and fixing portion 1031 is threadedly connected to the lower fixing piece 101. Preferably, the top of the lower fixing piece 101 is evenly provided with a plurality of internal thread holes, and the bottom of the lower connecting and fixing portion 1031 is provided with external threads matching the internal thread holes.

[0086] Specifically, the upper connecting member 104 includes an upper connecting fixed portion 1041 and an upper connecting rotating portion 1042, the upper connecting fixed portion 1041 and the upper connecting rotating portion 1042 are rotatably connected, the top of the upper connecting fixed portion 1041 is detachably connected to the upper fixing member 102, and the bottom of the lower connecting rotating portion 1032 is detachably connected to the top of the topmost extension member 105.

[0087] Specifically, the top of the upper connecting and fixing portion 1041 is threadedly connected to the upper fixing piece 102. Preferably, the bottom of the upper fixing piece 102 is evenly provided with a plurality of internal thread holes, and the top of the upper connecting and fixing portion 1041 is provided with external threads matching the internal thread holes.

[0088] Specifically, the bottom of the extension piece 105 and the bottom of the upper connecting rotating part 1042 are respectively provided with fixing clamps 106, and the top of the extension piece 105 and the top of the lower connecting rotating part 1032 are respectively provided with fixing slots 107, and the fixing slots 107 match the fixing clamps 106.

[0089] Specifically, the fixing member 106 is provided with an external thread, and the fixing slot 107 is provided with an internal thread matching the external thread.

[0090] Specifically, a positioning hole 108 is further provided on the fixing card 106, and a first positioning component 109 is provided on the outer side wall of the fixing card slot 107. A through hole is provided on the side wall of the fixing card slot 107. The first positioning component 109 includes a protective shell 1091, an elastic member 1092, a limiting member 1093 and a first positioning member 1094. The protective shell 1091 is provided on the outer side wall of the fixing card slot 107 corresponding to the through hole, and the elastic member 1092 and the limiting member 1093 are provided in the protective shell 1091. One end of the elastic member 1092 is connected to the inner wall of the protective shell 1091 away from the through hole, and the other end of the elastic member 1092 is connected to the limiting member 1093. Without considering the constraint of the elastic member 1092, the limiting member 1093 can move freely along the axial direction of the through hole in the protective shell 1091. A portion of the first positioning member 1094 is set in the fixed card slot 107, and the other portion of the first positioning member 1094 passes through the through hole and connects to the limiting member 1093. The positioning hole 108 matches the first positioning member 1094. During the threaded connection between the fixed card member 106 and the fixed card slot 107, the first positioning assembly 109 cooperates with the positioning hole 108 to achieve a fixed-point connection between the fixed card member 106 and the fixed card slot 107. This ensures that when the first positioning member 1094 is inserted into the positioning hole 108, the magnetic connector B1051 on the extension member 105 are all in the same plane, facilitating the neat mounting of the basic security inspection unit 5.

[0091] Specifically, for the lower connecting member 103 , the first positioning assembly 109 of the lower connecting member 103 is disposed on the side wall of the lower connecting rotating portion 1032 ; for the extending member 105 , the first positioning assembly 109 of the extending member 105 is disposed on the top side wall of the extending member 105 .

[0092] Specifically, a positioning groove 1034 is provided on the bottom side wall of the lower connecting rotating part 1032, and a second positioning assembly is provided on the top side wall of the lower connecting fixed part 1031. The second positioning assembly includes a second positioning member 1033. The bottom of the second positioning member 1033 is hinged to the lower connecting fixed part 1031. When the second positioning member 1033 is directly below the positioning groove 1034, the top of the second positioning member 1033 can be rotated into the positioning groove 1034 to constrain the lower connecting rotating part 1032, so that the lower connecting rotating part 1032 cannot rotate.

[0093] Specifically, the second positioning assembly further includes a retractable member 1035 with a locking function. The retractable member 1035 is disposed on the top of the second positioning member 1033. A locking hole 1036 is disposed on the top inner wall of the positioning slot 1034. The locking hole 1036 matches the retractable member 1035. When the second positioning member 1033 is rotated so that the top of the second positioning member 1033 rotates into the positioning slot 1034, the retractable member 1035 can be controlled to extend and extend into the locking hole 1036. The locking hole 1036 then constrains the second positioning member 1033 connected to the retractable member 1035, allowing the second positioning member 1033 to remain continuously located in the positioning slot 1034, thereby achieving stable restraint of the lower connecting rotating portion 1032.

[0094] Specifically, one end of the lower fixing member 101 is provided with a first expansion card 1011, and the other end of the lower fixing member 101 is provided with a first expansion notch 1012, and the first expansion card 1011 matches the first expansion notch 1012; one end of the upper fixing member 102 is provided with a second expansion card 1021, and the other end of the upper fixing member 102 is provided with a second expansion notch 1022, and the second expansion card 1021 matches the second expansion notch 1022. Through the cooperation of the first expansion card 1011 and the first expansion notch 1012, the end of the lower fixing member 101 is connected in series, and through the cooperation of the second expansion card 1021 and the second expansion notch 1022, the end of the upper fixing member 102 is connected in series, thereby achieving unlimited expansion of the expandable frame structure 1 in the length direction, and facilitating the flexible installation of the security inspection system according to the actual application environment.

[0095] When in use, in response to sudden emergency scenarios, such as the need to conduct risk control in the event of a sudden gathering of a large number of people, or the need to identify high-risk individuals in random sudden situations in high-density places, the head and tail of the lower fixing members 101 can be connected in series according to the size of the actual scene, and the head and tail of the upper fixing members 102 can be connected in series at the same time, and the lower connecting members 103 can be evenly arranged above the lower fixing members 101, and the upper connecting members 104 can be evenly arranged below the upper fixing members 102, and the lower connecting members 103 and the upper connecting members 104 can be arranged one by one, and then a certain number of extension members 105 can be installed between the lower connecting members 103 and the upper connecting members 104 as needed, so that the expandable frame structure 1 can be quickly assembled to form a security inspection channel, and then the expandable frame structure 1 can be quickly assembled to form a security inspection channel. The basic security inspection unit 5 is mounted on the top, and each basic security inspection unit 5 is allowed to operate independently for electric scanning security inspection. The power management terminal 3 is used to distribute and supply power to the basic security inspection unit 5. At the same time, the signal processing terminal 2 is used to control the coordination of the scanning action of the basic security inspection unit 5, receive the data collected by the basic security inspection unit 5, and perform imaging processing on the data. After the imaging processing is completed, the imaging information is displayed by the display terminal 4. When a high-risk factor is detected, the alarm module sends a corresponding warning message, and warns through light information and sound information. It can quickly realize the flexible and rapid construction of security inspection channels to respond to emergency scenarios, and realize the rapid response construction of security inspection systems to respond to prominent situations, which is of great significance for emergency response to sudden incidents.

[0096] The foregoing description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Rather, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant field. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the appended claims.

Claims

1. A security inspection system based on a distributed transmission signal source, characterized in that: It includes an expandable frame structure, a signal processing terminal, a power management terminal, a display terminal, and multiple basic security inspection units. The basic security inspection units are used for electronic scanning security inspection and are detachably mounted on the expandable frame structure. The display terminal and the basic security inspection units are respectively connected to the signal processing terminal for communication. The signal processing terminal is used to control the coordination of the scanning actions of the basic security inspection units, receive data collected by the basic security inspection units, and perform imaging processing on the data. The basic security inspection units are connected to the power management terminal, which is used to distribute and supply power to the basic security inspection units. The basic security inspection unit is a 32-channel fully electrically scanned two-dimensional sparse array for transmitting and receiving. A distributed signal source is integrated on the substrate of the basic security inspection unit. The distributed signal source is used to transmit signals and receive local oscillators. The substrate is provided with a control module, the distributed signal source is connected to the control module, and the control module is integrated with a CPLD logic module; The basic security inspection unit includes a base plate and four transceiver unit groups arranged on the base plate. The transceiver unit groups are arranged in a 2×2 array. The transceiver unit groups include two rows of transmitting units and two columns of receiving units. The two rows of transmitting units and the two columns of receiving units are arranged in a square shape. The expandable frame structure includes a lower fixing member, an upper fixing member, a plurality of lower connecting members, and a plurality of upper connecting members, wherein the lower fixing member is arranged in parallel with the upper fixing member, the lower connecting members are evenly arranged above the lower fixing member, the bottom ends of the lower connecting members are detachably connected to the lower fixing member, the upper connecting members are evenly arranged below the upper fixing member, the top ends of the upper connecting members are detachably connected to the upper fixing member, the lower connecting members are arranged in a one-to-one correspondence with the upper connecting members, at least one extension member is arranged between the lower connecting member and the upper connecting member, and the two ends of the extension member are detachably connected to the top end of the lower connecting member and the bottom end of the upper connecting member respectively; A magnetic connector A is provided on the rear end side wall of the substrate, and a magnetic connector B is provided on the extension piece. The magnetic connector A and the magnetic connector B constitute a magnetic connection assembly. Through the cooperation of the magnetic connection assembly, the basic security inspection unit can be detachably mounted on the extension piece.

2. A security inspection system based on a distributed transmission signal source according to claim 1, characterized in that: Each row of transmitting units is adjacent to a multi-channel transmitting SPQT module, and the transmitting units in the row are respectively connected to the SPQT module, and the SPQT module is arranged on the outside of the U-shaped array. Each column of receiving units is adjacent to a multi-channel receiving module, and the receiving units in the column are respectively connected to the multi-channel receiving module, and the multi-channel receiving module is arranged on the inside of the U-shaped array.

3. A security inspection system based on a distributed transmission signal source according to claim 2, characterized in that: The transmitting unit, receiving unit, transmitting SPQT module and receiving module are respectively arranged on the front end side surface of the substrate.

4. A security inspection system based on a distributed transmission signal source according to claim 1, characterized in that: The substrate is provided with an external interface.

5. A security inspection system based on a distributed transmission signal source according to claim 4, characterized in that: The external interfaces include a DC power feed interface, a digital communication interface, an analog intermediate frequency interface and a reference source input interface.

6. The security inspection system based on a distributed transmission signal source according to claim 1, characterized in that: The security inspection system further comprises an alarm module, which is connected to the signal processing terminal and is used to issue warning information.

7. A security inspection system based on a distributed transmission signal source according to claim 6, characterized in that: The warning information is at least one of light and sound warning information.

8. The security inspection system based on a distributed transmission signal source according to claim 1, characterized in that: The power management terminal is connected to a power source.

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