Intelligent security door

Abstract

This invention discloses an intelligent security gate, comprising: a security gate body (1), an electronic component box (11), an audible and visual alarm lamp (12), an infrared sensor (13), a display screen (14), and a capacitor plate array (15); wherein, the electronic component box (11) is internally equipped with a multi-channel high-frequency acquisition module, a multi-modal data processing module, and a waveform feature processing motherboard; the electronic component box (11) is located at the top crossbeam of the security gate body (1); the audible and visual alarm lamp (12) and the infrared sensor (13) are located on the side column surface of the security gate body (1); the display screen (14) is located on the outer surface of the electronic component box (11) or on the front panel of the crossbeam of the security gate body (1); the capacitor plate array (15) is located on the inner channel wall of the security gate body (1). It can achieve accurate identification and positioning of target items, improving the convenience of information acquisition for security personnel and the efficiency of security checks.

Description

Technical Field

[0001] This invention relates to the field of security inspection and intelligent sensing technology, and more specifically, to an intelligent security gate. Background Technology

[0002] With the increasing complexity of public safety, security gates, as the first line of defense in various public places, are undeniably crucial. Currently, the security equipment widely used in airports, train stations, large event venues, and government agencies is primarily magnetic induction metal detectors. These devices utilize the principle of electromagnetic induction, detecting objects by emitting alternating magnetic fields and detecting the eddy current effect generated when metal objects cut through magnetic lines of force. While metal detectors are technologically mature, inexpensive, and highly efficient, they have an inherent physical detection blind spot: they can only detect conductive metal materials and are completely unable to identify ceramic knives, composite material firearms, flammable and corrosive liquids in glass bottles, and new 3D-printed non-metallic weapons, posing a significant security risk.

[0003] To compensate for the shortcomings of single metal detection, X-ray backscatter imaging and millimeter-wave imaging technologies have gradually been introduced into the security inspection field. While these two technologies can effectively identify metallic and non-metallic targets through imaging, their application is subject to several limitations. First, X-ray equipment poses a risk of ionizing radiation, making it unsuitable for frequent human scanning, and the equipment is also bulky. Second, although millimeter-wave imaging equipment is radiation-free, its cost is extremely high, and its imaging method raises privacy concerns, making large-scale deployment in crowded public places such as subways and shopping malls difficult.

[0004] Furthermore, existing capacitive detection technology faces challenges such as severe environmental baseline drift, significant interference from differences in human body size, and a high false alarm rate. Meanwhile, current security gates rely on a limited interactive system, primarily using audible and visual alarms for alerts. This makes it difficult for security personnel to quickly and accurately obtain detailed information about target items and relevant supporting judgment criteria, impacting security efficiency. This has become a pressing technical problem that needs to be addressed. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent security gate that addresses the limitations of existing magnetic induction security gates in detecting non-metallic objects, as well as the radiation hazards, high costs, and privacy concerns associated with X-ray and millimeter-wave imaging equipment. This intelligent gate enables precise identification and positioning of target objects, improving the convenience of information acquisition for security personnel and enhancing security inspection efficiency.

[0006] One embodiment of this application provides an intelligent security gate, comprising:

[0007] The security gate body (1), electronic component box (11), sound and light alarm lamp tube (12), infrared sensor (13), display screen (14) and capacitor plate array (15);

[0008] The electronic device box (11) is equipped with a multi-channel high-frequency acquisition module, a multi-modal data processing module and a waveform feature processing motherboard.

[0009] The electronic device box (11) is located at the top crossbeam of the main body (1) of the security gate;

[0010] The audible and visual alarm lamp (12) and infrared sensor (13) are installed on the side column surface of the security gate body (1);

[0011] The display screen (14) is disposed on the outer surface of the electronic device box (11) or on the front panel of the crossbeam of the security gate body (1);

[0012] The capacitor plate array (15) is disposed on the inner channel wall of the security gate body (1);

[0013] The input end of the multi-channel high-frequency acquisition module is electrically connected to the capacitor plate array (15), and its output end is communicatively connected to the waveform feature processing motherboard; the waveform feature processing motherboard is bidirectionally communicatively connected to the multimodal data processing module; the control signal output end of the waveform feature processing motherboard is electrically connected to the audible and visual alarm lamp (12), the infrared sensor (13), and the display screen (14), respectively; the output end of the multimodal data processing module is electrically connected to the display screen (14).

[0014] Optionally, the infrared sensor (13) includes an infrared transmitter and an infrared receiver;

[0015] The infrared transmitter and infrared receiver are symmetrically embedded and installed on the opposite side walls of the left and right columns of the security gate body (1), and are located in a height area of ​​20cm to 50cm from the ground, forming an infrared beam beam that spans the security check channel.

[0016] The signal output pin of the infrared receiver is connected to the external interrupt interface of the waveform feature processing motherboard via a wire.

[0017] Optionally, the display screen (14) is a liquid crystal display module or an OLED display module;

[0018] The display screen (14) is embedded in the front facade of the electronic component box (11);

[0019] The waveform feature processing motherboard is configured to convert the analyzed vertical height coordinate data of the target object into a visual human body model image signal and transmit it to the display screen (14) for marking and display;

[0020] The multimodal data processing module is configured to receive target item feature data transmitted from the waveform feature processing motherboard, fuse and compare it with the pre-stored multimodal reference data, extract associated multimodal information and transmit it to the display screen (14) for display.

[0021] Optionally, the capacitor plate array (15) is composed of several independent capacitor sensing units, which are arranged vertically and equally at intervals along the inner channel wall of the security gate body (1).

[0022] The capacitive sensing unit sequentially comprises: a grounding shield layer (104), an insulating substrate layer (105), a sensing electrode layer (106), and an insulating protective layer (107); wherein,

[0023] The grounding shield layer (104) and the induction electrode layer (106) are respectively attached to both sides of the insulating substrate layer (105);

[0024] The insulating protective layer (107) covers the outer surface of the sensing electrode layer (106);

[0025] The sensing electrode layer (106) is connected to the input terminal of the multi-channel high-frequency acquisition module through a signal shielding line, and the grounding shielding layer (104) is connected to the system ground wire.

[0026] Optionally, the electronic device box (11) includes a metal shielding housing and a mounting bracket;

[0027] The multi-channel high-frequency acquisition module, waveform feature processing motherboard, and multi-modal data processing module are stacked and mounted inside the metal shielding housing using studs.

[0028] The bottom of the electronic device box (11) is provided with a heat dissipation grille and a wire passage hole, which is aligned and connected with the internal wiring channel of the security gate body (1).

[0029] Optionally, the sound and light alarm tube (12) includes a semi-transparent light distribution cover and a dual-color LED light bead assembly arranged inside; the sound and light alarm tube (12) is longitudinally embedded on the outer side of the side column of the security gate body (1);

[0030] The audible and visual alarm lamp (12) is electrically connected to the waveform feature processing motherboard and is configured to switch between a solid green light or a flashing red light state according to the level signal output by the motherboard.

[0031] Optionally, the left and right columns of the security gate body (1) are provided with hollow wiring channels that extend to the top crossbeam; the hollow wiring channels are provided with connecting wire harnesses; one end of the connecting wire harness is connected to the capacitor plate array (15), the infrared sensor (13) and the sound and light alarm lamp (12), and the other end passes through the top crossbeam and enters the electronic device box (11) to connect to the circuit module and the multimodal data processing module.

[0032] Optionally, the multimodal data processing module includes:

[0033] The communication connection includes a multi-modal data receiving unit, a data fusion unit, and a data output unit;

[0034] The multimodal data receiving unit is used to receive externally input multimodal reference data;

[0035] The data fusion unit is used to fuse and compare the target item feature data obtained by the waveform feature processing motherboard with the multimodal reference data obtained by the receiving unit to extract related information.

[0036] The data output unit is used to transmit the fused multimodal information to the display screen (14) for display.

[0037] Optionally, the multimodal data processing module supports data interaction with external databases via a network interface to update multimodal reference data in real time.

[0038] Optionally, the waveform feature processing motherboard is equipped with a time-domain differential feature analysis algorithm unit, which is used to perform real-time differential operations on the received multi-channel time-domain capacitance data and calculate the first derivative.

[0039] The time-domain differential feature analysis algorithm unit is also used to determine whether there are transient spikes in the derivative curve with amplitudes exceeding a preset threshold and durations that are extremely short, thereby distinguishing between smooth background signals generated by changes in human body shape and transient abrupt signals generated by target objects.

[0040] Compared with the prior art, the present invention provides an intelligent security gate, including a security gate body (1), an electronic component box (11), an audible and visual alarm lamp (12), an infrared sensor (13), a display screen (14), and a capacitor plate array (15); wherein, the electronic component box (11) is equipped with a multi-channel high-frequency acquisition module, a multi-modal data processing module, and a waveform feature processing motherboard; the electronic component box (11) is located at the top crossbeam of the security gate body (1); the audible and visual alarm lamp (12) and the infrared sensor (13) are located on the side column surface of the security gate body (1); the display screen (14) is located on the outer surface of the electronic component box (11) or on the front panel of the crossbeam of the security gate body (1); the capacitor plate array (15) is located on the inner channel wall of the security gate body (1). It can achieve accurate identification and positioning of target items, improving the convenience of information acquisition for security personnel and the efficiency of security checks. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of an isometric structure of an intelligent security gate provided in an embodiment of the present invention;

[0042] Figure 2 This is a schematic cross-sectional view of a partial layered structure of a capacitive sensing unit provided in an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of the internal structure and connection relationship of an electronic device box provided in an embodiment of the present invention;

[0044] Figure 4 This is a schematic diagram of a waveform feature processing motherboard provided in an embodiment of the present invention;

[0045] Figure 5 A flowchart illustrating the operation steps of an intelligent security gate, provided as an embodiment of the present invention. Detailed Implementation

[0046] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0047] See Figure 1 , Figure 1This is a schematic diagram of the isometric structure of an intelligent security gate provided in an embodiment of the present invention. The intelligent security gate includes a gate body (1), an electronic component box (11), an audible and visual alarm lamp (12), an infrared sensor (13), a display screen (14), and a capacitor plate array (15). The electronic component box (11) is internally equipped with a multi-channel high-frequency acquisition module, a multi-modal data processing module, and a waveform feature processing motherboard. The electronic component box (11) is located at the top crossbeam of the gate body (1). The audible and visual alarm lamp (12) and the infrared sensor (13) are located on the side columns of the gate body (1). The display screen (14)... The capacitor plate array (15) is disposed on the outer surface of the electronic component box (11) or on the front panel of the crossbeam of the security gate body (1); the capacitor plate array (15) is disposed on the inner channel wall of the security gate body (1); the input end of the multi-channel high-frequency acquisition module is electrically connected to the capacitor plate array (15), and its output end is communicatively connected to the waveform feature processing motherboard; the waveform feature processing motherboard is bidirectionally communicatively connected to the multimodal data processing module; the control signal output end of the waveform feature processing motherboard is electrically connected to the audible and visual alarm lamp (12), the infrared sensor (13), and the display screen (14) respectively; the output end of the multimodal data processing module is electrically connected to the display screen (14).

[0048] Specifically, the infrared sensor (13) includes an infrared transmitter and an infrared receiver; the infrared transmitter and the infrared receiver are symmetrically embedded and installed on the opposite side walls of the left and right columns of the security gate body (1), and are located in a height area of ​​20cm to 50cm above the ground, forming an infrared beam beam that spans the security channel; the signal output pin of the infrared receiver is connected to the external interrupt interface of the waveform feature processing motherboard through a wire.

[0049] It should be noted that the display screen (14) is a liquid crystal display module or an OLED display module; the display screen (14) is embedded in the front facade of the electronic device box (11); the waveform feature processing motherboard is configured to convert the vertical height coordinate data of the target object obtained by analysis into a visual human body model image signal and transmit it to the display screen (14) for marking and display; the multimodal data processing module is configured to receive the target object feature data transmitted by the waveform feature processing motherboard, fuse and compare it with the pre-stored multimodal reference data, extract the associated multimodal information and transmit it to the display screen (14) for display.

[0050] Specifically, the capacitor plate array (15) consists of several independent capacitive sensing units, which are arranged vertically and at equal intervals along the inner channel wall of the security gate body (1). See also Figure 2 , Figure 2This is a partial layered cross-sectional view of a capacitive sensing unit provided in an embodiment of the present invention. The capacitive sensing unit includes, in sequence, a grounding shield layer (104), an insulating substrate layer (105), a sensing electrode layer (106), and an insulating protective layer (107). The grounding shield layer (104) and the sensing electrode layer (106) are respectively attached to the two sides of the insulating substrate layer (105). The insulating protective layer (107) covers the outer surface of the sensing electrode layer (106). The sensing electrode layer (106) is connected to the input terminal of a multi-channel high-frequency acquisition module through a signal shielding line, and the grounding shield layer (104) is connected to the system ground.

[0051] Specifically, the electronic device box (11) includes a metal shielding shell and a mounting bracket; the multi-channel high-frequency acquisition module, the waveform feature processing motherboard and the multi-modal data processing module are stacked inside the metal shielding shell by studs; the bottom of the electronic device box (11) is provided with a heat dissipation grille and a wire passage hole, and the wire passage hole is aligned and connected with the internal wiring channel of the security gate body (1).

[0052] Specifically, the audible and visual alarm lamp tube (12) includes a semi-transparent light distribution cover and a dual-color LED lamp bead assembly arranged inside; the audible and visual alarm lamp tube (12) is longitudinally embedded on the outer side of the side column of the security gate body (1); the audible and visual alarm lamp tube (12) is electrically connected to the waveform feature processing motherboard and is configured to switch between a green constant light or a red flashing light state according to the level signal output by the motherboard.

[0053] Specifically, the left and right columns of the security gate body (1) are provided with hollow wiring channels that extend to the top beam; the hollow wiring channels are provided with connecting wire harnesses; one end of the connecting wire harness is connected to the capacitor plate array (15), the infrared sensor (13) and the sound and light alarm lamp (12), and the other end passes through the top beam and enters the electronic device box (11) to connect to the circuit module and the multimodal data processing module.

[0054] For example, the main body (1) of the security gate includes a left column, a right column, and a top beam, forming an overall U-shaped frame structure. Hollow wiring channels are provided inside the left and right columns, connecting to the internal space of the top beam for concealed wiring. An electronic component box (11) is fixedly mounted on the upper surface of the top beam of the security gate main body (1), using a top-mounted design. Its outer shell can be made of metal shielding material to shield against external electromagnetic interference. A display screen (14) is embedded on the front facade of the electronic component box (11) (facing the entrance of the passageway). The display screen (14) is preferably a liquid crystal display screen, used to visually display the human model and the location information of contraband.

[0055] The sound and light alarm tube (12) is longitudinally embedded on the outer side of the side column of the security gate body (1), and contains a dual-color LED light-emitting component to indicate the safety status of the passing personnel (green light for passage / red light for alarm).

[0056] The infrared sensor (13) includes an infrared transmitter and an infrared receiver, which are symmetrically installed on the opposite side walls of the left and right columns of the security gate body (1), with an installation height of about 70cm from the ground, forming an infrared beam that spans the security check channel for detecting the entry and exit of personnel.

[0057] The capacitor plate array (15) is vertically distributed along the inner channel wall of the security gate body (1). For example, it can be composed of 40 capacitor sensing units arranged in parallel at equal intervals along the vertical direction, dividing the detection area into multiple independent height levels.

[0058] For example, in order to improve detection sensitivity and suppress background interference, each capacitive sensing unit in the capacitor plate array (15) adopts a four-layer composite structure design. From the inner side near the security gate body (1) to the outer side near the passage, the layers are: grounding shield layer (104), insulating substrate layer (105), sensing electrode layer (106), and insulating protective layer (107).

[0059] Specifically, the insulating substrate layer (105) is located in the middle, serving as a supporting framework, and is preferably made of FR-4 epoxy resin fiberglass board. The sensing electrode layer (106) is attached to the outside of the substrate, serving as the core detection electrode plate, and forming a coupling capacitance with the human body passing through the channel. The grounding shield layer (104) is attached to the inside of the substrate and connected to the system ground wire. Its area is larger than that of the sensing electrode layer (106), and it is used to isolate the parasitic capacitance interference generated by the metal frame of the security gate body (1) and to unidirectionally confine the induced electric field inside the security channel. The insulating protective layer (107) is the outermost layer, made of high-strength insulating material, to prevent electrostatic damage caused by direct contact between the human body and the electrodes.

[0060] See Figure 3 , Figure 3This is a schematic diagram of the internal structure and connection relationship of an electronic component box provided in an embodiment of the present invention. The electronic component box (11) integrates a multi-channel high-frequency acquisition module and a waveform feature processing motherboard. The input terminal of the multi-channel high-frequency acquisition module is electrically connected to the sensing electrode layer (106) of each sensing unit in the capacitor plate array (15) through multiple shielded cables. The module contains a multiplexer and a high-speed A / D converter, and is configured to perform cyclic scanning of all plate channels at a sampling frequency higher than 500Hz, converting the weak analog capacitor signal into a digital time-domain signal and transmitting it to the waveform feature processing motherboard. The waveform feature processing motherboard is the control core of the system, and its control output terminal can be connected to the audible and visual alarm lamp (12), the infrared sensor (13), and the display screen (14), respectively. The motherboard integrates a microprocessor (MCU) that runs a time-domain differential feature analysis algorithm.

[0061] Specifically, the multimodal data processing module includes:

[0062] The communication connection includes a multi-modal data receiving unit, a data fusion unit, and a data output unit;

[0063] The multimodal data receiving unit is used to receive externally input multimodal reference data;

[0064] The data fusion unit is used to fuse and compare the target item feature data obtained by the waveform feature processing motherboard with the multimodal reference data obtained by the receiving unit to extract related information.

[0065] The data output unit is used to transmit the fused multimodal information to the display screen (14) for display.

[0066] For example, the externally input multimodal reference data set is It contains image feature data of contraband. Textual description feature data Physical attribute characteristic data (e.g., dielectric constant range, density interval, etc.), then the input relationship of the receiving unit is:

[0067]

[0068] in, , For reference image feature dimensions, such as pixel matrix features, shape contour features, etc.;

[0069] , For text feature dimensions, such as keyword vectors, category description vectors, etc.;

[0070] , For reference dielectric constant range, For reference density range and other physical parameters.

[0071] Simultaneously, the target item feature data output by the waveform feature processing motherboard is received. Its core is the abrupt change in the dielectric constant of the target item. Signal spike characteristics amplitude Duration and spatial location characteristics ,Right now:

[0072]

[0073] A weighted fusion algorithm is used to perform similarity matching between the target item features and multimodal reference data to extract association information. Let the fusion weight be... Given the matching weights corresponding to dielectric characteristics, signal characteristics, and spatial / physical characteristics, the fusion relationship is as follows:

[0074]

[0075] in, This is a similarity function with a value range of [0,1]. The higher the matching degree between x and y, the closer the function value is to 1. To reference the signal spike characteristics of prohibited substances, The physical properties of the target item derived from its dielectric constant.

[0076] Further, related information This can be specifically expressed as:

[0077]

[0078] in, The confidence level of a match between the target item and the reference contraband can be calculated using a similarity function. This represents the reference contraband image feature with the highest matching degree. This indicates the corresponding textual description of the prohibited item, such as its category and hazard level.

[0079] In one optional implementation, the multimodal data processing module supports data interaction with an external database via a network interface to update multimodal reference data in real time.

[0080] The waveform feature processing motherboard is equipped with a time-domain differential feature analysis algorithm unit. The time-domain differential feature analysis algorithm unit is used to perform real-time differential operations on the received multi-channel time-domain capacitance data and calculate the first derivative. The time-domain differential feature analysis algorithm unit is also used to determine whether there are transient spikes in the derivative curve with amplitudes exceeding a preset threshold and durations that are extremely short, thereby distinguishing between smooth background signals generated by changes in human body shape and transient abrupt signals generated by target objects.

[0081] See Figure 4 , Figure 4 This is a schematic diagram of a waveform feature processing motherboard provided in an embodiment of the present invention. The motherboard includes a differential operation unit and a threshold decision unit. The differential operation unit performs first-order differential operations on the real-time capacitance time-domain data acquired by the multi-channel high-frequency acquisition module to calculate the signal rate of change, thereby distinguishing between background and target signals. The capacitance waveform generated by changes in human body shape is continuous and smooth (low-frequency component), resulting in a small and continuous rate of change after differential analysis. Target items, such as contraband, have significantly different dielectric properties from the human body and clear edge contours, causing transient abrupt changes (high-frequency component) to superimpose on the background waveform, forming a steep peak curve after differential analysis, thus achieving signal separation. The threshold decision unit presets a signal amplitude threshold and monitors and determines the derivative curve output by the differential operation unit in real time to filter valid contraband signals. For example, when a transient peak with an amplitude exceeding the preset threshold and a very short duration is detected in the derivative curve, it is determined to be carrying contraband; smooth signals that do not reach the threshold are determined to be normal human interference, avoiding false alarms.

[0082] In summary, the differential operation unit completes signal feature extraction, transforming the contraband signal hidden in the background into identifiable spike features; the threshold decision unit completes effective signal filtering, accurately distinguishing contraband signals from interference signals based on preset standards, together constituting the core identification logic of the security gate.

[0083] See Figure 5 , Figure 5 A flowchart of the operation steps of an intelligent security gate is provided for an embodiment of the present invention, as follows: Figure 5 As shown, the workflow of the security gate is as follows:

[0084] After the system is powered on and initialized, the multi-channel high-frequency acquisition module is in a low-power sleep state, and only the infrared sensor (13) is in working state. When a person enters the channel and blocks the beam of the infrared sensor (13), an interrupt signal is generated to wake up the waveform feature processing motherboard, and the system immediately starts the multi-channel high-frequency acquisition module to perform full-channel high-speed data acquisition on the capacitor plate array (15).

[0085] The waveform feature processing motherboard acquires real-time capacitance time-domain waveform data during the passage of a human body. The algorithm performs differential operations on the waveform. If the person is not carrying contraband, the capacitance waveform is a smooth envelope due to the continuous and gradual changes in body shape, with a small and continuous differential value (rate of change). If contraband (such as a knife) is being carried, the dielectric properties of the contraband differ significantly from those of the human body, and its edge contours are clear. This results in a transient spike with an extremely short duration and a very high rate of change superimposed on the smooth human body background waveform. The algorithm monitors the differential curve in real time, and once it detects a transient spike with an amplitude exceeding a preset threshold, it determines that the person is carrying contraband.

[0086] The mainboard controls the audible and visual alarm lamp (12) to switch to a red flashing state to issue an alarm; at the same time, based on the pole channel number where the spike signal appears (such as pole number 10-12), the height position of the contraband (such as waist) is determined, and a red mark is displayed on the corresponding part of the human body model on the display screen (14). If the judgment is normal, after the personnel pass through, the audible and visual alarm lamp (12) is controlled to display a solid green light, and then the system automatically delays and resets to the standby state.

[0087] As can be seen, this invention utilizes the principle of dielectric constant perturbation to overcome the physical limitations of magnetic induction technology. It can detect not only metals but also effectively identify non-metallic contraband such as ceramics, glass, and liquids. By employing time-domain differential feature analysis technology, it can automatically filter out background interference caused by environmental drift and differences in human body shape based on the transient rate of change of the signal, significantly reducing the false alarm rate. Furthermore, the combination of the display screen and the audible and visual alarm lights provides both macroscopic passage guidance and microscopic location tracking of contraband, greatly improving security inspection efficiency. The system uses low-power passive sensing, with no radiation and no imaging, fully protecting the safety and privacy of those being inspected. Simultaneously, this invention introduces a multimodal data processing module. By fusing multimodal reference data, it displays multimodal information related to contraband on the display screen, enriching the interaction methods of the security gate and enabling security personnel to quickly obtain more auxiliary judgment information, further improving the accuracy and efficiency of security inspections. This effectively solves the problems of traditional security gates having limited interaction and making judgment difficult for security personnel.

[0088] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0089] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0090] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0091] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0092] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0093] If the aforementioned integrated units are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned memory includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0094] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An intelligent security gate, characterized in that, include: The security gate body (1), electronic component box (11), sound and light alarm lamp tube (12), infrared sensor (13), display screen (14) and capacitor plate array (15); The electronic device box (11) is equipped with a multi-channel high-frequency acquisition module, a multi-modal data processing module and a waveform feature processing motherboard. The electronic device box (11) is located at the top crossbeam of the main body (1) of the security gate; The audible and visual alarm lamp (12) and infrared sensor (13) are installed on the side column surface of the security gate body (1); The display screen (14) is disposed on the outer surface of the electronic device box (11) or on the front panel of the crossbeam of the security gate body (1); The capacitor plate array (15) is disposed on the inner channel wall of the security gate body (1); The input end of the multi-channel high-frequency acquisition module is electrically connected to the capacitor plate array (15), and its output end is communicatively connected to the waveform feature processing motherboard; the waveform feature processing motherboard is bidirectionally communicatively connected to the multimodal data processing module; the control signal output end of the waveform feature processing motherboard is electrically connected to the audible and visual alarm lamp (12), the infrared sensor (13), and the display screen (14), respectively; the output end of the multimodal data processing module is electrically connected to the display screen (14).

2. The intelligent security gate according to claim 1, characterized in that, The infrared sensor (13) includes an infrared transmitter and an infrared receiver; The infrared transmitter and infrared receiver are symmetrically embedded and installed on the opposite side walls of the left and right columns of the security gate body (1), and are located in a height area of ​​20cm to 50cm from the ground, forming an infrared beam beam that spans the security check channel. The signal output pin of the infrared receiver is connected to the external interrupt interface of the waveform feature processing motherboard via a wire.

3. The intelligent security gate according to claim 2, characterized in that, The display screen (14) is a liquid crystal display module or an OLED display module; The display screen (14) is embedded in the front facade of the electronic component box (11); The waveform feature processing motherboard is configured to convert the analyzed vertical height coordinate data of the target object into a visual human body model image signal and transmit it to the display screen (14) for marking and display; The multimodal data processing module is configured to receive target item feature data transmitted from the waveform feature processing motherboard, fuse and compare it with the pre-stored multimodal reference data, extract associated multimodal information and transmit it to the display screen (14) for display.

4. The intelligent security gate according to claim 3, characterized in that, The capacitor plate array (15) is composed of several independent capacitor sensing units, which are arranged vertically and at equal intervals along the inner channel wall of the security gate body (1). The capacitive sensing unit sequentially comprises: a grounding shield layer (104), an insulating substrate layer (105), a sensing electrode layer (106), and an insulating protective layer (107); wherein, The grounding shield layer (104) and the induction electrode layer (106) are respectively attached to both sides of the insulating substrate layer (105); The insulating protective layer (107) covers the outer surface of the sensing electrode layer (106); The sensing electrode layer (106) is connected to the input terminal of the multi-channel high-frequency acquisition module through a signal shielding line, and the grounding shielding layer (104) is connected to the system ground wire.

5. The intelligent security gate according to claim 4, characterized in that, The electronic component box (11) includes a metal shielding shell and a mounting bracket; The multi-channel high-frequency acquisition module, waveform feature processing motherboard, and multi-modal data processing module are stacked and mounted inside the metal shielding housing using studs. The bottom of the electronic device box (11) is provided with a heat dissipation grille and a wire passage hole, which is aligned and connected with the internal wiring channel of the security gate body (1).

6. The intelligent security gate according to claim 5, characterized in that, The sound and light alarm tube (12) includes a semi-transparent light distribution cover and a dual-color LED light bead assembly arranged inside; the sound and light alarm tube (12) is longitudinally embedded on the outer side of the side column of the security gate body (1); The audible and visual alarm lamp (12) is electrically connected to the waveform feature processing motherboard and is configured to switch between a solid green light or a flashing red light state according to the level signal output by the motherboard.

7. The intelligent security gate according to claim 6, characterized in that, The left and right columns of the main body (1) of the security gate are provided with hollow cable trays that extend to the top beam; the hollow cable trays are provided with connecting wire harnesses; one end of the connecting wire harnesses is connected to the capacitor plate array (15), the infrared sensor (13) and the sound and light alarm lamp (12), and the other end passes through the top beam and enters the electronic device box (11) to connect to the circuit module and the multimodal data processing module.

8. The intelligent security gate according to claim 7, characterized in that, The multimodal data processing module includes: The communication connection includes a multi-modal data receiving unit, a data fusion unit, and a data output unit; The multimodal data receiving unit is used to receive externally input multimodal reference data; The data fusion unit is used to fuse and compare the target item feature data obtained by the waveform feature processing motherboard with the multimodal reference data obtained by the receiving unit to extract related information. The data output unit is used to transmit the fused multimodal information to the display screen (14) for display.

9. The intelligent security gate according to claim 8, characterized in that, The multimodal data processing module supports data interaction with external databases via a network interface and real-time updates of multimodal reference data.

10. The intelligent security gate according to any one of claims 1 to 9, characterized in that, The waveform feature processing motherboard is equipped with a time-domain differential feature analysis algorithm unit, which is used to perform real-time differential operations on the received multi-channel time-domain capacitance data and calculate the first derivative. The time-domain differential feature analysis algorithm unit is also used to determine whether there are transient spikes in the derivative curve with amplitudes exceeding a preset threshold and durations that are extremely short, thereby distinguishing between smooth background signals generated by changes in human body shape and transient abrupt signals generated by target objects.

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