Security check door

Abstract

The utility model discloses a security check door, and relates to the technical field of security and protection equipment design. The security check door comprises a first door body and a second door body which are arranged at an interval, a security check channel is formed between the first door body and the second door body, each of the first door body and the second door body comprises a mounting plate, a magnetic detection coil and a metal detection coil, and the magnetic detection coils and the metal detection coils are arranged on the mounting plates. And the magnetic detection coil and the metal detection coil are arranged on the mounting plate in a staggered manner. According to the scheme, the problem of poor detection precision of the existing security door can be solved.

Description

Technical Field

[0001] This application belongs to the field of security equipment design technology, specifically relating to a security gate. Background Technology

[0002] Currently, security gates are widely used in various fields, such as train stations, airports, shopping malls, libraries, convention centers and other public places with high traffic, mainly for security checks on people and goods.

[0003] Security gates on the market mainly detect items containing metal by setting up metal detection coils inside the gate. However, this detection method is relatively simple, resulting in poor detection accuracy. Utility Model Content

[0004] The purpose of this application is to provide a security gate that can solve the problem of poor detection accuracy of current security gates.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] This application provides a security gate, including a first gate body and a second gate body arranged at intervals, forming a security inspection channel between the first gate body and the second gate body. Both the first gate body and the second gate body include a mounting plate, a magnetic detection coil and a metal detection coil. The magnetic detection coil and the metal detection coil are both disposed on the mounting plate, and the magnetic detection coil and the metal detection coil are staggered on the mounting plate.

[0007] In this embodiment, by adding a magnetic detection coil and mounting both the magnetic detection coil and the metal detection coil on the mounting plates of the first and second doors, and staggering their arrangement on the mounting plates, the magnetic detection coil receives magnetic signals to detect magnetic items when the security gate is operating. When an item containing metal enters the security channel, the metal detection coil can detect it. In other words, the magnetic detection coil can detect magnetic metals, supplementing the detection of smaller magnetic metals that the metal detection coil cannot detect. Furthermore, by detecting the strength of the magnetic properties of the inspected item, the inspected item can be classified, thereby improving the detection accuracy of the security gate. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the security gate disclosed in the embodiments of this application;

[0009] Figure 2 This is an exploded view of the first or second door body disclosed in the embodiments of this application;

[0010] Figure 3This is an exploded view of a portion of the structure of the first or second door body disclosed in an embodiment of this application.

[0011] Figure 4 This is a schematic diagram of a portion of the structure of the first or second gate disclosed in an embodiment of this application;

[0012] Figure 5 for Figure 4 A magnified view of a portion of the structure shown;

[0013] Figure 6 for Figure 4 Partial cross-sectional view of the structure shown.

[0014] Explanation of reference numerals in the attached figures:

[0015] 100-First door body, 110-Mounting plate, 111-Positioning hole, 120-Magnetic detection coil, 121-Third coil, 122-Fourth coil, 130-Metal detection coil, 131-First coil, 131a-Positive terminal, 131b-Negative terminal, 132-Second coil, 140-Circuit board, 141-Board segment, 142-Electrical connection part, 143-Connection hole, 150-Support plate, 151-Allowing hole, 160-Connector, 170-Protective cover plate, 180-Power panel;

[0016] 200 - Second gate body;

[0017] 300 - Top connection component. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0020] The security gate provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0021] like Figures 1 to 6 As shown in the figure, this application discloses a security gate. Optionally, the security gate can be a millimeter-wave security gate, which has the characteristics of fast scanning imaging speed, comprehensive detection, safety and reliability, good privacy protection effect and high detection accuracy. Of course, it can also be other types of security gates. This application does not make specific limitations on this.

[0022] The security gate includes a first door body 100 and a second door body 200 spaced apart, forming a security screening channel between them. This channel has an entrance end and an exit end. Personnel enter the security screening channel from the entrance end for security checks and then exit from the exit end. Optionally, the security gate also includes a top connecting assembly 300, through which the first door body 100 and the second door body 200 are connected.

[0023] Both the first gate 100 and the second gate 200 include a mounting plate 110, a magnetic detection coil 120 (also referred to as an inductive structure), and a metal detection coil 130. The magnetic detection coil 120 and the metal detection coil 130 detect personnel passing through based on different detection principles. The metal detection coil 130 detects personnel through the cooperation of a transmitting coil and a receiving coil. Optionally, one of the metal detection coil 130 on the first gate 100 and the metal detection coil 120 on the second gate 200 can be a receiving coil, and the other can be a transmitting coil. Of course, the metal detection coil 130 on the first gate 100 and the second gate 200 can also have both transmitting and receiving coils. This application embodiment does not impose specific limitations on this.

[0024] Both the magnetic detection coil 120 and the metal detection coil 130 are mounted on the mounting plate 110, and the magnetic detection coil 120 and the metal detection coil 130 are staggered on the mounting plate 110, that is, the mounting positions of the magnetic detection coil 120 and the metal detection coil 130 on the mounting plate 110 do not overlap, avoiding mutual interference between them. Furthermore, the working ends of both the magnetic detection coil 120 and the metal detection coil 130 face the security inspection channel. Optionally, the metal detection coil 130 can be an enameled copper coil. Since copper has good ductility and conductivity, this facilitates the installation of the metal detection coil 130 and provides good signal transmission performance. Of course, other metal structures can also be used; this embodiment does not impose specific limitations on this.

[0025] In this embodiment, by adding a magnetic detection coil 120 and mounting both the magnetic detection coil 120 and the metal detection coil 130 on the mounting plate 110 of the first door body 100 and the second door body 200, and staggering the magnetic detection coil 120 and the metal detection coil 130 on the mounting plate 110, when the security gate is in operation, the magnetic detection coil 120 is used to receive magnetic signals to detect magnetic items; when an item containing metal enters the security channel, the metal detection coil 130 can detect the item containing metal. In other words, the magnetic detection coil 120 can detect magnetic metals, supplementing the detection of smaller magnetic metals that the metal detection coil 130 cannot detect. Furthermore, by detecting the strength of the magnetism of the inspected item, the inspected item can be classified, thereby improving the detection accuracy of the security gate. Therefore, this embodiment can solve the problem of poor detection accuracy in current security gates.

[0026] In an optional embodiment, the magnetic detection coil 120 and the metal detection coil 130 are staggered on the mounting plate 110 to avoid mutual interference. However, if the distance between the magnetic detection coil 120 and the metal detection coil 130 is too large, they will occupy a large space. Therefore, the magnetic detection coil 120 can be arranged in the peripheral area of ​​any one of the metal detection coils 130. Alternatively, when the magnetic detection coil 120 and the metal detection coil 130 are located on different sides of the mounting plate 110, the orthographic projection of the magnetic detection coil 120 is arranged in the peripheral area of ​​the orthographic projection of any one of the metal detection coils 130 in the thickness direction of the mounting plate 110. This ensures that the magnetic detection coil 120 and the metal detection coil 130 can work independently and can also be arranged in a concentrated manner, thereby reducing the space occupied by them.

[0027] In a further optional embodiment, the metal detection coil 130 disposed on the mounting plate 110 includes a first coil group symmetrically arranged relative to a first axis, wherein the first axis is parallel to the height direction of the first door body 100; and / or, the metal detection coil 130 on the mounting plate 110 includes a second coil group symmetrically arranged relative to a second axis, wherein the second axis is parallel to the passage direction of the security check channel; either the first coil group or the second coil group includes a first coil 131 and a second coil 132 arranged at intervals, and the magnetic detection coil 120 is arranged at the interval between the first coil 131 and the second coil 132.

[0028] Specifically, in the configuration where the first coil group is symmetrically arranged about the first axis, and the magnetic detection coil 120 is arranged at intervals between the first coil 131 and the second coil 132 of the first coil group, the magnetic detection coil 120, the first coil 131, and the second coil 132 can all extend along the height direction of the security check channel. While keeping the size of the mounting plate 110 unchanged, the size of the magnetic detection coil 120, the first coil 131, and the second coil 132 can be increased, thereby increasing the detection range. In the configuration where the second coil group is symmetrically arranged about the second axis, and the magnetic detection coil 120 is arranged at intervals between the first coil 131 and the second coil 132 of the second coil group, the first coil 131, the magnetic detection coil 120, and the second coil 132 are arranged sequentially at intervals along the height direction of the security check channel. In this case, the space occupied by the first coil 131, the magnetic detection coil 120, and the second coil 132 in the passage direction of the security check channel is relatively small. Of course, the first coil group and the second coil group can also be arranged simultaneously on the mounting plate 110. In this case, the magnetic detection coil 120 can be arranged in a cross shape, thereby further increasing the detection range of the magnetic detection coil 120. In other words, there are multiple ways to arrange the magnetic detection coil 120 and the metal detection coil 130, and the specific arrangement can be flexibly selected according to actual needs to meet various usage requirements.

[0029] Optionally, the metal detection coil 130 and the magnetic detection coil 120 can be configured with different circuit boards to form two independent signal transmission paths; in other optional embodiments, the first door body 100 and the second door body 200 also include a circuit board 140, and the magnetic detection coil 120 and the metal detection coil 130 share the circuit board 140, that is, the magnetic detection coil 120 and the metal detection coil 130 are both electrically connected to the circuit board 140. Specifically, after the magnetic detection coil 120 detects a magnetic item, it sends a first detection signal to the circuit board 140. After the metal detection coil 130 detects an item containing metal, it sends a second detection signal to the circuit board 140. During the operation of the security gate, when only the first detection signal is transmitted to the circuit board 140, it indicates that the item is magnetic (such as a Bluetooth headset); when only the second detection signal is transmitted to the circuit board 140, it indicates that the item contains metal; when the detection signal transmitted to the circuit board 140 includes both the first and second detection signals, it indicates that the item contains both magnetic and metal structures. This can further improve the classification effect of the security gate in detecting items. Furthermore, the magnetic detection coil 120 and the metal detection coil 130 share the same circuit board 140, which not only saves the cost of manufacturing the circuit board 140, but also reduces the space occupied by the circuit board 140.

[0030] Optionally, the circuit board 140 and the magnetic detection coil 120 can both be mounted on the mounting plate 110, in which case they can be staggered. Alternatively, in other optional embodiments, when the circuit board 140 is arranged along the height direction of the first door body 100, the first coil 131 and the second coil 132 are located on both sides of the circuit board 140 along the passage direction of the security check channel, which facilitates the electrical connection of the first coil 131 and the second coil 132 to the circuit board 140. In the width direction of the security check channel (referring to the direction perpendicular to the passage direction), the magnetic detection coil 120 is located on one side of the circuit board 140, and the working end of the magnetic detection coil 120 faces into the security check channel to detect the items being inspected in the security check channel. When the size of the mounting plate 110 is fixed, with the above arrangement, the circuit board 140 does not need to occupy additional space in the passage direction of the security check channel, which can reserve more space for the installation of the magnetic detection coil 120 and the metal detection coil 130.

[0031] Optionally, the number of first coils 131 and second coils 132 can both be one; or, the number of first coils 131 and second coils 132 can both be at least two. The magnetic detection coil 120 has a first side and a second side arranged opposite to each other. Each first coil 131 is arranged on the first side of the magnetic detection coil 120, and each second coil 132 is arranged on the second side of the magnetic detection coil 120. The first coils 131 and the second coils 132 are arranged sequentially at intervals in the height direction of the security check channel. In this scheme, by setting multiple first coils 131 and second coils 132 in a limited space, the length of the metal detection coil 130 can be increased, thereby extending the current path of the metal detection coil 130 and improving the detection performance of the metal detection coil 130.

[0032] In another optional embodiment, in the extension direction of the security checkpoint, the magnetic detection coil 120 is disposed in the middle region of the mounting plate 110. In this case, the dimensions of the first coil 131 and the second coil 132 disposed on opposite sides of the magnetic detection coil 120 can be basically the same, and correspondingly, the forces acting on the mounting plate 110 are also basically the same, resulting in a more balanced force distribution. Of course, in the extension direction of the security checkpoint, the magnetic detection coil 120 can also be disposed in the edge region of the mounting plate 110.

[0033] In a further optional embodiment, both the first coil 131 and the second coil 132 have a positive terminal 131a and a negative terminal 131b. The positive terminal 131a of the first coil 131 is electrically connected to the negative terminal 131b of the second coil 132 via a circuit board 140, and the negative terminal 131b of the first coil 131 is electrically connected to the positive terminal 131a of the second coil 132 via a circuit board 140. Optionally, the circuit board 140 is provided with a plurality of electrical connection portions 142, and the positive terminals 131a and 131b of the first coil 131 and the positive terminals 131a and 131b of the second coil 132 are respectively electrically connected to each electrical connection portion 142 in a one-to-one correspondence. Optionally, the positive terminals 131a and 131b of the first coil 131 and the positive terminals 131a and 131b of the second coil 132 can be electrically connected to each electrical connection part 142 by welding, which provides good connection stability; further optionally, each electrical connection part 142 can be a solder pad, so that the positive terminals 131a and 131b of the first coil 131 and the second coil 132 can be stably connected to each electrical connection part 142.

[0034] The magnetic detection coil 120 includes a third coil 121 and a fourth coil 122 spaced apart. In the height direction of the first door body 100, each electrical connection 142 is located in the interval between the third coil 121 and the fourth coil 122. This not only facilitates the arrangement of the electrical connection 142 but also ensures that the magnetic detection coil 120 has a large installation area, thereby increasing the detection range of the magnetic detection coil 120. Alternatively, a continuous magnetic detection coil 120 can be provided on only one side of each electrical connection 142, or the third coil 121 and the fourth coil 122 can both be arranged on the same side of each electrical connection 142.

[0035] Optionally, both the first door body 100 and the second door body 200 include a connector 160. The circuit board 140 is provided with a connection hole 143. One end of the connector 160 passes through the connection hole 143 and is connected to the mounting plate 110. Each electrical connection part 142 is arranged around the connector 160, that is, each electrical connection part 142 and the connector 160 are arranged in a concentrated manner to save space on the circuit board 140.

[0036] Optionally, both the first coil 131 and the second coil 132 can be circular; or, in other optional embodiments, both the first coil 131 and the second coil 132 are rectangular. In this case, the perimeter of the first coil 131 and the second coil 132 is larger, and the current path in the first coil 131 and the second coil 132 is correspondingly longer, which is beneficial to improving the detection performance of the first coil 131 and the second coil 132. Furthermore, in the height direction of the security check channel, the positive terminal 131a and the negative terminal 131b are both located in the middle part of the rectangular structure, so that the electrical connection parts 142 are concentrated, which facilitates manufacturing.

[0037] In another optional embodiment, the first end of the magnetic detection coil 120 is electrically connected to the circuit board 140, that is, the first end of the magnetic detection coil 120 is electrically connected to the side of the circuit board 140 facing the mounting plate 110. The mounting plate 110 is provided with a positioning hole 111, and the second end of the magnetic detection coil 120 is inserted into the positioning hole 111 so that the magnetic detection coil 120 and the mounting plate 110 are positioned and engaged. This not only increases the contact area between the magnetic detection coil 120 and the mounting plate 110, thereby improving the connection stability between the two, but also allows at least a portion of the magnetic detection coil 120 to be inserted into the positioning hole 111, which allows the magnetic detection coil 120 to be closer to the security check channel, thereby improving the detection efficiency of the magnetic detection coil 120.

[0038] Optionally, each coil of the magnetic detection coil 120 can be a columnar structure to facilitate connection with the mounting plate 110.

[0039] In an optional embodiment, since the magnetic detection coil 120 needs to have a certain inductance, the magnetic detection coil 120 needs to meet a certain height. Optionally, the thickness of the mounting plate 110 can be equal to the height of the magnetic detection coil 120. Alternatively, the first door 100 and the second door 200 also include a support plate 150. The support plate 150 is provided with a clearance hole 151. The second end of the magnetic detection coil 120 passes through the clearance hole 151 and is positioned and engaged with the positioning hole 111 so that the circuit board 140 is supported on the support plate 150. In this case, while ensuring that the height of the magnetic detection coil 120 remains unchanged, the thickness of the mounting plate 110 can be set to be smaller, thereby reducing the weight of the first door 100 and the second door 200.

[0040] Optionally, the circuit board 140 can be a continuous integral structure; or, in another optional embodiment, the circuit board 140 includes at least two board segments 141 connected in sequence, with adjacent board segments 141 interlocking along the height direction of the security check channel. This solution sets the circuit board 140 as multiple board segments 141, which are electrically connected by interlocking, which facilitates the packaging and transportation of the circuit board 140.

[0041] Optionally, the positioning hole 111 can be a circular hole. In this case, during the installation of the circuit board 140, when the first segment of the circuit board 140 is installed on the mounting plate 110 and the second segment is installed, after one end of the second segment is inserted into the first segment, the magnetic detection coil 120 on the second segment may be misaligned with the corresponding positioning hole 111 on the mounting plate 110. In this case, the size of the positioning hole 111 needs to be increased. Alternatively, the positioning hole 111 can be an elongated hole that extends along the height direction of the security check channel. During the installation of the circuit board 140, it is convenient to install each segment 141 of the circuit board 140. Furthermore, the magnetic detection coil 120 and the positioning hole 111 are positioned and matched in the passage direction of the security check channel to improve the connection stability between the magnetic detection coil 120 and the mounting plate 110. Of course, the shape of the positioning hole 111 can also be adapted to the magnetic detection coil 120. For example, if the positioning hole 111 is a circular hole, the magnetic detection coil 120 can be inserted into the positioning hole 111 first, and then the circuit board 140 can be installed.

[0042] Optionally, in the width direction of the security checkpoint, the magnetic detection coil 120 and the metal detection coil 130 can be respectively arranged on opposite sides of the mounting plate 110; or, in the width direction of the security checkpoint, the magnetic detection coil 120 and the metal detection coil 130 can both be arranged on the same side of the mounting plate 110, which can reduce the thickness of the first door body 100 and the second door body 200, thereby reducing the space occupied by the security gate.

[0043] Optionally, both the magnetic detection coil 120 and the metal detection coil 130 can be disposed on the side of the mounting plate 110 facing the security checkpoint; or, both the magnetic detection coil 120 and the metal detection coil 130 can be disposed on the side of the mounting plate 110 away from the security checkpoint. In this case, the mounting plate 110 is a non-metallic structure, such as a wooden structure, to ensure that magnetic field lines can pass through the mounting plate 110, thereby ensuring the detection performance of the magnetic detection coil 120 and the metal detection coil 130.

[0044] Optionally, the metal detection coil 130 can be moved relative to the mounting plate 110. After the magnetic detection coil 120 is installed on the mounting plate 110, the position of the metal detection coil 130 can be adjusted to achieve zeroing of the circuit, i.e., manual zeroing, so that the detection performance of the security gate is in a better state. Furthermore, since the magnetic detection coil 120 is set between the first coil 131 and the second coil 132 of the metal detection coil 130, the signals on both sides of the magnetic detection coil 120 can be kept balanced, so that the magnetic detection coil 120 can maintain a better zeroing value during operation.

[0045] Optionally, both the first door 100 and the second door 200 include a protective cover 170 and a power panel 180. The protective cover 170 is disposed on the side of the mounting plate 110 away from the security check channel. The protective cover 170 and the mounting plate 110 form an accommodating space. The magnetic detection coil 120, the metal detection coil 130, the circuit board 140, and the support plate 150 are all located within the accommodating space. The power panel 180 is detachably disposed on the protective cover 170. The power panel 180 is located at the lower part of the protective cover 170. The power panel 180 is electrically connected to the circuit board 140 and is used for plugging in external devices.

[0046] Based on the security gate disclosed in this application embodiment, after the magnetic detection coil 120 and the metal detection coil 130 are installed, the positions of the first coil 131 and the second coil 132 relative to the magnetic detection coil 120 are adjusted to achieve zeroing, so that the first coil 131 and the second coil 132 maintain signal balance, thereby ensuring that the metal detection coil 130 and the magnetic detection coil 120 do not interfere with each other, and both can achieve good detection results. Furthermore, the metal detection coil 130 and the magnetic detection coil 120 can collect signals simultaneously, and each has its own signal processing unit. By extracting the feature values ​​of their respective channels, they are jointly input into the processing unit of the circuit board 140, namely the pattern recognition algorithm unit (i.e., the CNN (Convolutional Neural Network) of the circuit board 140) for item classification.

[0047] The metal detection coil 130 is used to detect items containing metal, and the magnetic detection coil 120 is used to detect magnetic items, such as Bluetooth headsets, smart glasses, and other items containing permanent magnets. However, the headset signal cannot be detected by the magnetic detection coil 120. Therefore, by combining the magnetic detection coil 120 and the metal detection coil 130 to form a complementary system, some items that contain permanent magnets and can be detected by the magnetic detection coil 120 can be further classified, thereby improving the detection accuracy of the security gate for item classification, and thus better classifying and identifying small magnetic items.

[0048] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A security gate, characterized in that, It includes a first door (100) and a second door (200) spaced apart, forming a security checkpoint between the first door (100) and the second door (200). Both the first door body (100) and the second door body (200) include a mounting plate (110), a magnetic detection coil (120) and a metal detection coil (130). The magnetic detection coil (120) and the metal detection coil (130) are both disposed on the mounting plate (110), and the magnetic detection coil (120) and the metal detection coil (130) are staggered on the mounting plate (110).

2. The security gate according to claim 1, characterized in that, The magnetic detection coil (120) is arranged in the periphery of any one of the metal detection coils (130).

3. The security gate according to claim 2, characterized in that: The metal detection coil (130) on the mounting plate (110) includes a first coil group symmetrically arranged relative to a first axis, wherein the first axis is parallel to the height direction of the first door (100); and / or, the metal detection coil (130) on the mounting plate (110) includes a second coil group symmetrically arranged relative to a second axis, wherein the second axis is parallel to the passage direction of the security check channel; Each of the first coil group and the second coil group includes a first coil (131) and a second coil (132) arranged at intervals, and the magnetic detection coil (120) is arranged at the interval between the first coil (131) and the second coil (132).

4. The security gate according to claim 3, characterized in that, Both the first door body (100) and the second door body (200) include a circuit board (140), and the magnetic detection coil (120) and the metal detection coil (130) share the circuit board (140).

5. The security gate according to claim 4, characterized in that, When the circuit board (140) is arranged along the height direction of the first door body (100), the first coil (131) and the second coil (132) are located on both sides of the circuit board (140) along the passage direction of the security check channel. In the width direction of the security check channel, the magnetic detection coil (120) is located on one side of the circuit board (140), and the working end of the magnetic detection coil (120) faces into the security check channel.

6. The security gate according to claim 5, characterized in that, Both the first coil (131) and the second coil (132) have a positive terminal (131a) and a negative terminal (131b). The circuit board (140) is provided with a plurality of electrical connection parts (142). The positive terminal (131a) and the negative terminal (131b) of the first coil (131) and the positive terminal (131a) and the negative terminal (131b) of the second coil (132) are respectively electrically connected to each of the electrical connection parts (142). The magnetic detection coil (120) includes a third coil (121) and a fourth coil (122) spaced apart. In the height direction of the first door body (100), each of the electrical connection parts (142) is located in the interval area between the third coil (121) and the fourth coil (122).

7. The security gate according to claim 4, characterized in that, The first end of the magnetic detection coil (120) is electrically connected to the circuit board (140). The mounting plate (110) is provided with a positioning hole (111). The second end of the magnetic detection coil (120) is inserted into the positioning hole (111) so that the magnetic detection coil (120) and the mounting plate (110) are positioned and cooperated.

8. The security gate according to claim 7, characterized in that, Both the first door body (100) and the second door body (200) include a support plate (150). The support plate (150) is provided with at least two clearance holes (151). The second end of the magnetic detection coil (120) passes through the clearance hole (151) and is positioned and engaged with the positioning hole (111) so that the circuit board (140) is supported on the support plate (150).

9. The security gate according to claim 7, characterized in that, The circuit board (140) includes at least two sequentially connected board segments (141), with adjacent board segments (141) interlocked along the height direction of the security checkpoint; and / or, The positioning hole (111) is an elongated hole that extends along the height direction of the security check channel. The magnetic detection coil (120) and the positioning hole (111) are positioned and matched in the passage direction of the security check channel.

10. The security gate according to claim 1, characterized in that, The magnetic detection coil (120) and the metal detection coil (130) are both located on the same side of the mounting plate (110).

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