Nonlinear node detection module, security check device and security check door

Abstract

The invention provides a nonlinear node detection module, a security check device and a security check door. The non-linear node detection module comprises an antenna plate, an antenna assembly and a non-linear node detection unit, the antenna assembly and the nonlinear node detection unit are both arranged on the antenna plate; the antenna assembly comprises a transmitting antenna and a receiving antenna assembly which are electrically connected with the nonlinear node detection unit respectively; the antenna plate is sequentially provided with a plurality of antenna assemblies in the gravity direction. According to the scheme, whether the detected target carries the electronic equipment or not is detected by adopting a nonlinear node detection principle, so that manual secondary inquiry is avoided, the security check passing efficiency is improved, and the labor cost is reduced.

Description

Technical Field

[0001] The present application relates to a nonlinear node detection module, a security inspection device and a security inspection door. Background Art

[0002] Most of the security gates in the prior art are metal security gates. When a person passes through with metal objects, an alarm will be generated. The metal objects on the person or in the package carried by the person can be detected, such as various controlled knives, weapons, electronic equipment and other objects containing metal. Summary of the invention

[0003] The inventors have found that current security gates are usually only able to detect and alarm metal objects, but cannot detect electronic devices. For places where electronic equipment security checks are required, such as places with high confidentiality standards, manual secondary inquiries are required, which will result in low security check efficiency and increase labor costs. In view of the above-mentioned problem of being unable to detect electronic devices, it is necessary to propose a nonlinear node detection module, a security inspection device, and a security inspection gate. The technical solutions proposed in this application are as follows:

[0004] In a first aspect, an embodiment of the present application provides a nonlinear node detection module, including an antenna board, an antenna assembly, and a nonlinear node detection unit;

[0005] The antenna assembly and the nonlinear node detection unit are both arranged on the antenna board;

[0006] The antenna assembly includes a transmitting antenna and a receiving antenna assembly electrically connected to the nonlinear node detection unit respectively;

[0007] The antenna board is provided with a plurality of antenna components in sequence along the direction of gravity.

[0008] In one or some optional embodiments, the receiving surface of the receiving antenna assembly faces the transmitting antenna and is obliquely disposed on the antenna board, the transmitting surface of the transmitting antenna faces the receiving antenna assembly and is obliquely disposed on the antenna board, and the receiving antenna assembly and the transmitting antenna are at different heights in the direction of gravity.

[0009] In one or some optional embodiments, the distance between the bottom end of the emitting surface and the center of the receiving surface is smaller than the distance between the top end of the emitting surface and the center of the receiving surface; the distance between the bottom end of the receiving surface and the center of the emitting surface is smaller than the distance between the top end of the receiving surface and the center of the emitting surface.

[0010] In one or some optional embodiments, the angle between the receiving surface of the receiving antenna assembly and the antenna board is 45°, and / or the angle between the transmitting surface of the transmitting antenna and the antenna board is 45°.

[0011] In one or some optional embodiments, the coverage ranges of the fundamental wave signals transmitted by the transmitting antennas in two adjacent antenna assemblies intersect in the direction of gravity.

[0012] In one or some optional embodiments, an antenna fixing bracket is provided on the antenna board; the transmitting antenna in one of the antenna assemblies is installed on one side of the antenna fixing bracket, and the receiving antenna assembly in another antenna assembly is installed on the other side.

[0013] In one or some optional embodiments, the receiving antenna assembly includes a second-order receiving antenna and a third-order receiving antenna;

[0014] The second-order receiving antenna is closer to the antenna board than the third-order receiving antenna; or,

[0015] The third-order receiving antenna is closer to the antenna board than the second-order receiving antenna.

[0016] In one or some optional embodiments, the transmitting antenna includes a plurality of first antenna elements, and the width of the coverage range of the fundamental wave signals emitted by all the first antenna elements in the horizontal direction is less than or equal to the width of the antenna board.

[0017] In a second aspect, an embodiment of the present application further proposes a security inspection device, comprising the above-mentioned nonlinear node detection module.

[0018] In the third aspect, an embodiment of the present application further proposes a security door, comprising two door panel assemblies, each of which comprises the above-mentioned nonlinear node detection module; the antenna assembly of one of the door panel assemblies is arranged relative to the antenna assembly of the other door panel assembly.

[0019] In one or some optional embodiments, in the two door panel assemblies, the transmitting antenna in the antenna assembly of one door panel assembly and the receiving antenna assembly in the antenna assembly opposite to the other door panel assembly are arranged relative to each other in the direction of gravity; or,

[0020] The transmitting antennas in the antenna assemblies opposite to each other in the two door panel assemblies are arranged opposite to each other in the direction of gravity.

[0021] In one or some optional embodiments, the coverage ranges of fundamental wave signals transmitted by two groups of transmitting antennas in two antenna assemblies arranged opposite to each other on the two antenna boards intersect in the horizontal direction.

[0022] In one or some optional embodiments, the receiving antenna assembly includes a second-order receiving antenna and a third-order receiving antenna; the receiving signals of two groups of the second-order receiving antennas in two antenna assemblies arranged opposite to each other on the two antenna boards intersect in the horizontal coverage range; and / or,

[0023] The coverage areas of the receiving signals of the two groups of the third-order receiving antennas in the two antenna assemblies arranged opposite to each other on the two antenna boards intersect in the horizontal direction.

[0024] Based on the above technical solution, the beneficial effects of this application compared with the prior art are as follows:

[0025] The nonlinear node detection module provided in the embodiment of the present application adopts the principle of nonlinear node detection to detect whether the detected target carries an electronic device. In addition, the receiving surface of the receiving antenna assembly faces the transmitting antenna and is obliquely arranged on the antenna board, the transmitting surface of the transmitting antenna faces the receiving antenna assembly and is obliquely arranged on the antenna board, and the receiving antenna assembly and the transmitting antenna are at different heights in the direction of gravity. In this way, the wave coverage ranges of the transmitting antenna and the receiving antenna assembly will have more intersecting parts, and because the transmitting antenna and the receiving antenna assembly are inclined to face each other, it is convenient for the receiving antenna assembly to receive the harmonic signal reflected from the detection target corresponding to the transmitting antenna, thereby improving the detection reliability and detection efficiency. In addition, since the transmitting surface of the transmitting antenna is tilted, the fundamental wave signal emitted by the transmitting antenna can enter the electronic device from the front as well as from the top and bottom. The receiving surface of the receiving antenna assembly is tilted, which is also convenient for receiving harmonic signals reflected from the electronic device in multiple directions (such as the front, top, and bottom). This can further reduce the missed detection rate, improve the detection accuracy, reduce the false alarm rate of security inspections, and ensure the reliability of detection. It is not only suitable for the detection of larger electronic devices, but also for the detection of small electronic devices such as mobile phones. Moreover, the principle of nonlinear node detection is used to detect whether the detected target carries an electronic device, thereby avoiding manual secondary inquiries, improving the efficiency of security inspections, and reducing labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a front view of a nonlinear node detection module provided in an embodiment of the present application;

[0027] Figure 2 yes Figure 1 A front view of the antenna assembly of the nonlinear node detection module shown;

[0028] Figure 3 yes Figure 1 A stereogram of the nonlinear node detection module shown;

[0029] Figure 4is a front view of another nonlinear node detection module provided in an embodiment of the present application;

[0030] Figure 5 yes Figure 4 A front view of the antenna assembly of the nonlinear node detection module shown;

[0031] Figure 6 yes Figure 4 A stereogram of the nonlinear node detection module shown;

[0032] Figure 7 yes Figure 1 or Figure 4 A rear view of the nonlinear node detection module shown;

[0033] Figure 8 It is a structural schematic diagram of the security door provided in an embodiment of the present application;

[0034] Fig. 9 yes Figure 8 A schematic diagram of a partial three-dimensional structure of a side surface of an embodiment of the security door shown;

[0035] Fig.10 It corresponds to Fig. 9 The structural schematic diagram of the left door panel assembly of the security door shown;

[0036] Fig.11 It corresponds to Fig. 9 A schematic diagram of the three-dimensional structure of another side portion of the security door shown;

[0037] Fig.12 It corresponds to Fig.11 The structural schematic diagram of the right door panel assembly of the security door shown;

[0038] Fig.13 yes Figure 8 A schematic diagram of a partial three-dimensional structure of a side surface of another embodiment of the security door shown;

[0039] Fig.14 It corresponds to Fig.13 A schematic diagram of the three-dimensional structure of another side portion of the security door shown;

[0040] Fig.15 It corresponds to Fig.13 and Fig.14 The schematic diagram of the structure of the left and right door panel components of the security door shown;

[0041] Fig.16 It is a partial structural schematic diagram of a door panel assembly of a security door provided in an embodiment of the present application;

[0042] Fig.17It is a schematic diagram of the display interface of the display in the security door provided in the embodiment of the present application;

[0043] Fig.18 It corresponds to Figures 9 to 12 The radiation diagram of the transmitting antenna of the security gate shown;

[0044] Fig.19 It corresponds to Figures 9 to 12 A schematic diagram of the lobes of all transmitting antennas and receiving antenna components of the security door shown;

[0045] Fig. 20 is with Fig.19 A similar schematic diagram of the lobes of all transmitting antenna and receiving antenna components of another security door;

[0046] Fig.21 It corresponds to Figures 13 to 15 The schematic diagram of the lobes of all transmitting antennas of the security gate shown;

[0047] Fig. 22 It corresponds to Figures 13 to 15 A schematic diagram of the lobes of all transmitting antennas and receiving antenna components of the security door shown;

[0048] Fig.23 is with Fig. 22 A similar schematic diagram of the lobes of all transmitting antenna and receiving antenna components of another security door;

[0049] Fig.24 yes Figure 8 Another structural schematic diagram of the door panel assembly of the security door shown.

[0050] in:

[0051] 1. Nonlinear node detection module; 101 is an antenna board; 1011 is the front of the antenna board; 10111 is the first arrangement area; 1012 is the back of the antenna board; 10121 is the second arrangement area; 102 is an antenna assembly; 1021 is a transmitting antenna; 10211 is a first antenna element; 10212 is a transmitting surface; 102121 is the top of the transmitting surface; 102122 is the bottom of the transmitting surface; 1022 is a receiving antenna assembly; 10221 is a second-order receiving antenna; 102211 is a second antenna element; 10222 is a third-order receiving antenna; 102221 is a third antenna element; 10223 is a receiving surface; 102231 is the top of the receiving surface; 102232 is the bottom of the receiving surface; 103 is a nonlinear node detection unit; 104 is an antenna fixing bracket; 1041 is a first inclined surface; 1042 is a second inclined surface;

[0052] 2 is a door panel assembly; 201 is a chassis fixing beam; 202 is a chassis shielding plate; 203 is an inner cover plate; 204 is a vertical beam; 205 is an alarm light; 206 is a top beam cover plate; 207 is a base; 208 is a floor mat;

[0053] 3 is the central controller;

[0054] 4 is a display. DETAILED DESCRIPTION

[0055] Embodiment 1

[0056] The present application embodiment proposes a nonlinear node detection module 1, referring to Figures 1 to 7 As shown, it can be applied to security gates or other devices that need to detect electronic devices. The nonlinear node detection module 1 includes: an antenna board 101, an antenna assembly 102 and a nonlinear node detection unit 103.

[0057] The antenna assembly 102 and the nonlinear node detection unit 103 are both disposed on the antenna board 101 .

[0058] The antenna assembly 102 includes a transmitting antenna 1021 and a receiving antenna assembly 1022 which are electrically connected to the nonlinear node detection unit 103. The antenna board 101 is provided with a plurality of antenna assemblies 102 in sequence along the gravity direction (see Figure 1 ).

[0059] The receiving surface 10223 of the receiving antenna component 1022 faces the transmitting antenna 1021 and is obliquely arranged on the antenna board 101, the transmitting surface 10212 of the transmitting antenna 1021 faces the receiving antenna component 1022 and is obliquely arranged on the antenna board 101, and the receiving antenna component 1022 and the transmitting antenna 1021 are at different heights in the direction of gravity.

[0060] It should be noted that the receiving surface 10223 of the receiving antenna assembly 1022 is a surface for receiving electromagnetic wave signals. For example, if the receiving antenna assembly 1022 adopts a PCB antenna, the surface on which the PCB antenna is arranged is the receiving surface 10223. The transmitting surface 10212 of the transmitting antenna 1021 is a surface for transmitting electromagnetic wave signals. For example, if the transmitting antenna 1021 adopts a PCB antenna, the surface on which the PCB antenna is arranged is the transmitting surface 10212.

[0061] In this embodiment, refer to Figure 3 or Figure 6As shown, the receiving surface 10223 of the receiving antenna component 1022 faces the transmitting antenna 1021 and is obliquely arranged on the antenna board 101, for example, the receiving surface 10223 of the receiving antenna component 1022 is obliquely facing the transmitting antenna 1021. The transmitting surface 10212 of the transmitting antenna 1021 faces the receiving antenna component 1022 and is obliquely arranged on the antenna board 101, for example, the transmitting surface 10212 of the transmitting antenna 1021 is obliquely facing the receiving antenna component 1022.

[0062] In this embodiment, the receiving antenna assembly 1022 and the transmitting antenna 1021 are at different heights in the gravity direction, which can be, Figures 1 to 3 As shown, in the direction of gravity, the receiving antenna assembly 1022 is higher than the transmitting antenna 1021, or, referring to Figures 4 to 6 As shown, in the gravity direction, the receiving antenna assembly 1022 is lower than the transmitting antenna 1021. For example, if the receiving antenna assembly 1022 is located above and the transmitting antenna 1021 is located below, the normal direction of the receiving surface 10223 of the receiving antenna assembly 1022 is obliquely downward and does not point to the antenna board 101; the normal direction of the transmitting surface 10212 of the transmitting antenna 1021 is obliquely upward and does not point to the antenna board 101.

[0063] In this embodiment, the receiving antenna assembly 1022 includes a second-order receiving antenna 10221 and a third-order receiving antenna 10222. Figures 1 to 3 As shown, in the gravity direction, the second-order receiving antenna 10221 is lower than the third-order receiving antenna 10222, or, it can also be, refer to Figures 4 to 6 As shown, in the direction of gravity, the second-order receiving antenna 10221 is higher than the third-order receiving antenna 10222.

[0064] The nonlinear node detection unit 103 is used to drive the transmitting antenna 1021 to transmit the fundamental wave signal, and to receive the harmonic signal returned by the receiving antenna assembly 1022, so as to detect the electronic device according to the received harmonic signal. In this embodiment, the fundamental wave signal is, for example, an electromagnetic wave with a frequency of 3.4-3.6GHz, and the harmonic signal includes, for example, a second harmonic signal and a third harmonic signal, wherein the second harmonic signal is, for example, a harmonic with a frequency of 7-7.5GHz, and the third harmonic signal is, for example, a harmonic with a frequency of 10-10.6GHz. The nonlinear node detection unit 103 includes, for example, a radio frequency circuit, or includes a radio frequency circuit and a processing unit (such as an MCU). The electronic device is, for example, a mobile phone. Among them, "detecting the electronic device according to the harmonic signal" can be performed by the nonlinear node detection unit 103, or by another central controller. Specifically, the harmonic signal can be analyzed and processed according to the intensity of the harmonic signal or by using the fuzzy recognition algorithm and self-learning algorithm in the field of artificial intelligence, and then the electronic device can be detected according to the harmonic change law before and after the fundamental wave is emitted (such as: detecting whether the target is carrying an electronic device, or detecting whether the target is an electronic device).

[0065] The nonlinear node detection module 1 provided in the embodiment of the present application adopts a receiving surface 10223 of the receiving antenna component 1022 facing the transmitting antenna 1021 and being obliquely arranged on the antenna board 101, and the transmitting surface 10212 of the transmitting antenna 1021 facing the receiving antenna component 1022 and being obliquely arranged on the antenna board 101, so that the wave coverage ranges of the transmitting antenna 1021 and the receiving antenna component 1022 will have more intersecting parts, and because the transmitting antenna 1021 and the receiving antenna component 1022 are inclined to face each other, it is convenient for the receiving antenna component 1022 to receive the harmonic signal reflected from the detection target corresponding to the transmitting antenna 1021, thereby improving the detection reliability and detection efficiency. In addition, because the transmitting surface 10212 of the transmitting antenna 1021 is inclined, the fundamental wave signal emitted by the transmitting antenna 1021 can enter the electronic device from the top and bottom in addition to from the front, which can further reduce the missed detection rate. The receiving surface 10223 of the receiving antenna assembly 1022 is tilted, which is also convenient for receiving harmonic signals reflected from the electronic device in multiple directions (such as the front, top, and bottom). Therefore, this embodiment can detect electronic devices by analyzing the received harmonic signals through the above arrangement, which can improve the detection accuracy, reduce the false alarm rate of security inspection, and ensure the reliability of detection. It is not only suitable for the detection of electronic devices with larger volumes, but also suitable for the detection of small electronic devices such as mobile phones. Moreover, the principle of nonlinear node detection is used to detect electronic devices, which avoids manual secondary inquiries, improves the efficiency of security inspections, and reduces labor costs.

[0066] In one embodiment, referring to Figures 4 to 6As shown, the distance between the bottom end 102122 of the transmitting surface 10212 of the transmitting antenna 1021 and the center of the receiving surface 10223 of the receiving antenna assembly 1022 is smaller than the distance between the top end 102121 of the transmitting surface 10212 of the transmitting antenna 1021 and the center of the receiving surface 10223 of the receiving antenna assembly 1022, that is, the bottom end 102122 of the transmitting surface 10212 is closer to the receiving antenna assembly 1022. The distance between the bottom end 102232 of the receiving surface 10223 of the receiving antenna assembly 1022 and the center of the transmitting surface 10212 of the transmitting antenna 1021 is smaller than the distance between the top end 102231 of the receiving surface 10223 of the receiving antenna assembly 1022 and the center of the transmitting surface 10212 of the transmitting antenna 1021, that is, the bottom end 102232 of the receiving surface 10223 is closer to the transmitting antenna 1021 than the top end 102231. Therefore, viewed from the side, the transmitting surface 10212 of the transmitting antenna 1021, the antenna board 101, and the receiving surface 10223 of the receiving antenna assembly 1022 together form a trapezoid, with the antenna board 101 serving as the base of the trapezoid, and the line between the top end 102121 of the transmitting surface 10212 and the top end 102231 of the receiving surface 10223 serving as the top end of the trapezoid, with the length of the top end being greater than the length of the bottom end.

[0067] In one embodiment, referring to Figure 3 or Figure 6 As shown, there is a first set angle α1 between the transmitting surface 10212 of the transmitting antenna 1021 and the antenna board 101, and the first set angle α1 is greater than 0° and less than 90°. Similarly, there is a second set angle α2 between the receiving surface 10223 of the receiving antenna assembly 1022 and the antenna board 101, and the second set angle α2 is greater than 0° and less than 90°. Specifically, the first set angle α1 and the second set angle α2 can be the same, for example, 45°; or the first set angle α1 and the second set angle α2 can also be different. Among them, if the transmitting antenna 1021 is plate-shaped, the above-mentioned first set angle α1 is also the angle between the transmitting antenna 1021 and the antenna board 101. If the receiving antenna assembly 1022 is plate-shaped, the above-mentioned second set angle α2 is also the angle between the receiving antenna assembly 1022 and the antenna board 101.

[0068] Therefore, in this embodiment, the transmitting surface 10212 of the transmitting antenna 1021 can be tilted relative to the antenna board 101, and the receiving surface 10223 of the receiving antenna assembly 1022 can also be tilted relative to the antenna board 101. Figure 3As shown, the antenna assembly 102 includes a transmitting antenna 1021 located at the bottom and a second-order receiving antenna 10221 and a third-order receiving antenna 10222 located at the top, that is, the normal direction of the transmitting surface 10212 of the transmitting antenna 1021 is obliquely upward and does not point to the antenna board 101, and the normal direction of the receiving surface 10223 of the second-order receiving antenna 10221 and the third-order receiving antenna 10222 is obliquely downward and does not point to the antenna board 101. In other embodiments, refer to Figure 6 As shown, the antenna assembly 102 includes a transmitting antenna 1021 located at the top and a second-order receiving antenna 10221 and a third-order receiving antenna 10222 located at the bottom, respectively. The normal direction of the transmitting surface 10212 of the transmitting antenna 1021 is obliquely downward and not pointing to the antenna board 101, while the normal direction of the receiving surface 10223 of the second-order receiving antenna 10221 and the third-order receiving antenna 10222 is obliquely upward and not pointing to the antenna board 101.

[0069] For electronic devices with good shielding, such as mobile phones and voice recorders, the fundamental wave signal enters the interior of the electronic device from the charging port, earpiece, speaker, headphone jack and other structures to detect nonlinear nodes, that is, semiconductor nodes. In the embodiment of the present application, when the electronic device is carried close to the user, since the transmitting surface 10212 of the transmitting antenna 1021 is tilted relative to the antenna plate 101, the fundamental wave signal emitted by the transmitting antenna 1021 can be incident from multiple directions and can more easily enter the interior of the electronic device, thereby improving the detection accuracy and detection efficiency, reducing the false alarm rate of detection, and achieving accurate detection of small-sized and well-shielded electronic devices.

[0070] In a specific embodiment, if Figure 1 , Figure 4 and Figure 7 As shown, the antenna assembly 102 and the nonlinear node detection unit 103 are respectively arranged on the front side 1011 and the back side 1012 of the antenna board 101. In this way, it is easier to arrange the antenna assembly 102 on the front side 1011 of the antenna board 101 accordingly.

[0071] In a specific embodiment, referring to Figure 1 or Figure 4 As shown, the antenna board 101 of the nonlinear node detection module 1 is provided with a plurality of antenna components 102 in sequence along the gravity direction, and the fundamental wave signals emitted by the transmitting antennas 1021 in two adjacent antenna components 102 intersect in the coverage range in the gravity direction.

[0072] In the embodiment of the present application, the fundamental wave signals emitted by the transmitting antennas 1021 in the two adjacent antenna assemblies 102 of the nonlinear node detection module 1 intersect in the coverage range in the gravity direction, thereby avoiding the detection range that cannot be covered along the gravity direction, thereby realizing the detection of the detection target within the area where multiple antenna assemblies 102 are arranged along the gravity direction, and reducing the missed alarm rate. Among them, the gravity direction is parallel to the length direction of the antenna plate 101, for example Figure 1 Top-to-bottom orientation shown.

[0073] Among them, the antenna board 101 of the nonlinear node detection module 1 is provided with a plurality of antenna components 102 in sequence along the gravity direction, and there may be the following situations: first, each antenna component 102 includes a transmitting antenna 1021 and a receiving antenna component 1022; second, some antenna components 102 include a transmitting antenna 1021 and a receiving antenna component 1022, and some antenna components 102 (such as the antenna component 102 at the bottom) only include a transmitting antenna 1021 or a receiving antenna component 1022. These are all within the protection scope of the present application. In a specific embodiment, refer to Figure 3 As shown, an antenna fixing bracket 104 is provided on the antenna board 101, and a transmitting antenna 1021 in one of the antenna assemblies 102 is installed on one side of the antenna fixing bracket 104, and a receiving antenna assembly 102 in another antenna assembly 102 is installed on the other side. Specifically, the antenna fixing bracket 104 may include a first inclined surface 1041 and a second inclined surface 1042 connected at the top. The transmitting antenna 1021 is fixed to the first inclined surface 1041 of the antenna fixing bracket 104, and the receiving antenna assembly 102 (such as a second-order receiving antenna 10221 and a third-order receiving antenna 10222) is fixed to the second inclined surface 1042 of the antenna fixing bracket 104. Of course, it can also be, refer to Figure 6 As shown, the transmitting antenna 1021 is fixed to the second inclined surface 1042 of the antenna fixing bracket 104, and the receiving antenna assembly 102 (such as the second-order receiving antenna 10221 and the third-order receiving antenna 10222) is fixed to the first inclined surface 1041 of the antenna fixing bracket 104. The first inclined surface 1041 and the second inclined surface 1042 can be installed on the antenna board 101 at opposite angles. When the transmitting antenna 1021 is fixed to the antenna fixing bracket 104, the first set angle α1 between the transmitting surface 10212 of the transmitting antenna 1021 and the antenna board 101 can be the angle α1 between the first inclined surface 1041 of the antenna fixing bracket 104 and the antenna board 101, for example, the angle α1 can be 45°.

[0074] When the receiving antenna assembly 102 is fixed on the antenna fixing bracket 104, the second set angle α2 between the receiving surface 10223 of the receiving antenna assembly 102 and the antenna board 101 can be the angle α2 between the second inclined surface 1042 of the antenna fixing bracket 104 and the antenna board 101, for example, the angle α2 can be 45°.

[0075] Further, there is a suspended space between the transmitting antenna 1021 and the antenna fixing bracket 104, and / or there is a suspended space between the receiving antenna assembly 102 and the antenna fixing bracket 104. For example, except for the connecting member, there is a gap between the transmitting antenna 1021 and the rest of the antenna fixing bracket 104, that is, air; except for the connecting member, there is a gap between the receiving antenna assembly 102 and the rest of the antenna fixing bracket 104, that is, air. In this way, the reference layer of the transmitting antenna 1021 and the receiving antenna assembly 102 is an air layer, which can improve the gain.

[0076] In a specific embodiment, referring to Figure 4 or Figure 5 As shown, the distance between the bottom of the first inclined surface 1041 and the second inclined surface 1042 is greater than the distance between the tops thereof, and the bottoms of the first inclined surface 1041 and the second inclined surface 1042 are mounted on the antenna board 101, for example, the cross section of the antenna fixing bracket 104 is a triangle or an isosceles trapezoid. The above mounting method makes the transmitting antenna 1021 and the receiving antenna assembly 102 more stable.

[0077] In a specific embodiment, referring to Figure 3 or Figure 6As shown, the receiving antenna assembly 1022 includes a second-order receiving antenna 10221 and a third-order receiving antenna 10222. The second-order receiving antenna 10221 of the receiving antenna assembly 1022 is closer to the antenna board 101 than the third-order receiving antenna 10222, that is, the second-order receiving antenna 10221 is arranged on the antenna fixing bracket 104 close to the antenna board 101, while the third-order receiving antenna 10222 is arranged on the antenna fixing bracket 104 away from the antenna board 101, or in other words, the second-order receiving antenna 10221 is arranged on the inner side of the antenna fixing bracket 104, while the third-order receiving antenna 10222 is arranged on the outer side of the antenna fixing bracket 104, that is, the third-order receiving antenna 10222 is arranged further outward than the second-order receiving antenna 10221. Of course, in other optional embodiments, it may be that the third-order receiving antenna 10222 of the receiving antenna assembly 1022 is closer to the antenna board 101 than the second-order receiving antenna 10221, and the second-order receiving antenna 10221 is arranged on the antenna fixing bracket 104 away from the antenna board 101, while the third-order receiving antenna 10222 is arranged on the antenna fixing bracket 104 close to the antenna board 101, or in other words, the second-order receiving antenna 10221 is arranged on the outside of the antenna fixing bracket 104, while the third-order receiving antenna 10222 is arranged on the inside of the antenna fixing bracket 104, that is, the second-order receiving antenna 10221 is arranged further outward than the third-order receiving antenna 10222.

[0078] In a specific embodiment, referring to Figure 2 or Figure 5 As shown, the transmitting antenna 1021 of the nonlinear node detection module 1 includes a plurality of first antenna elements 10211, and the width of the horizontal coverage range of the fundamental wave signals emitted by all the first antenna elements 10211 is less than or equal to the width of the antenna board 101. In other words, the fundamental wave emitted by the transmitting antenna 1021 in the horizontal direction will not exceed the antenna board 101. Among them, the width direction of the antenna board 101 is parallel to the arrangement direction of the plurality of first antenna elements 10211, for example Figure 1 As shown, the width direction of the antenna board 101 is from left to right. Since the transmitting antenna 1021 includes multiple first antenna elements 10211, that is, an antenna array is adopted, the fundamental wave signals emitted by all the first antenna elements 10211 can be superimposed on each other, thereby reducing the width of the entire fundamental wave signal lobe and improving the strength of the transmitted signal.

[0079] In a specific embodiment, referring to Figure 2 or Figure 5As shown, the receiving antenna component 1022 of the nonlinear node detection module 1 includes a second-order receiving antenna 10221 and a third-order receiving antenna 10222. The second-order receiving antenna 10221 includes a plurality of second antenna elements 102211. In a specific embodiment, the third-order receiving antenna 10222 of the nonlinear node detection module 1 includes a plurality of third antenna elements 102221.

[0080] In the embodiment of the present application, the transmitting antenna 1021 of the nonlinear node detection module 1 includes a plurality of first antenna elements 10211, and the fundamental wave signals of the plurality of first antenna elements 10211 will not exceed the detection width of the antenna board 101 in the horizontal direction, thereby preventing components outside the nonlinear node detection module 1 from interfering with the detection result and reducing the false alarm rate. Correspondingly, the second-order receiving antenna 10221 of the nonlinear node detection module 1 includes a plurality of second antenna elements 102211, and the third-order receiving antenna 10222 includes a plurality of third antenna elements 102221, which is also more convenient for receiving the second harmonic signal and the third harmonic signal reflected by the fundamental wave signal emitted by the plurality of first antenna elements 10211.

[0081] In a specific embodiment, referring to Figure 7 As shown, the antenna board 101 of the nonlinear node detection module 1 is provided with a plurality of nonlinear node detection units 103 electrically connected in sequence along the gravity direction. In the embodiment of the present application, the antenna assembly 102 of the nonlinear node detection module 1 and the nonlinear node detection unit 103 may correspond one to one, for example, the nonlinear node detection unit 103 controls the antenna assembly 102 at the same height, so that the antenna assembly 102 and the nonlinear node detection unit 103 are easily arranged.

[0082] In the nonlinear node detection module 1 provided in the embodiment of the present application, the receiving surface 10223 of the receiving antenna component 1022 faces the transmitting antenna 1021 and is obliquely arranged on the antenna board 101, the transmitting surface 10212 of the transmitting antenna 1021 faces the receiving antenna component 1022 and is obliquely arranged on the antenna board 101, and the receiving antenna component 1022 and the transmitting antenna 1021 are at different heights in the gravity direction. In this way, the wave coverage ranges of the transmitting antenna 1021 and the receiving antenna component 1022 will have more intersecting parts, and because the transmitting antenna 1021 and the receiving antenna component 1022 are inclined to face each other, it is convenient for the receiving antenna component 1022 to receive the harmonic signal reflected from the detection target corresponding to the transmitting antenna 1021, thereby improving the detection reliability and detection efficiency. In addition, since the transmitting surface 10212 of the transmitting antenna 1021 and the receiving surface 10223 of the receiving antenna assembly 1022 are both tilted, the fundamental wave signal emitted by the transmitting antenna 1021 can enter the inside of the electronic device from the top and bottom in addition to from the front, and the receiving antenna assembly 1022 is also more convenient for receiving harmonic signals reflected from multiple directions (such as the front, top, and bottom), which can further reduce the missed detection rate, improve the detection accuracy, reduce the false alarm rate of security inspection, ensure the reliability of detection, and is not only suitable for the detection of electronic devices with larger volumes, but also for the detection of electronic devices with smaller volumes such as mobile phones. Moreover, the principle of nonlinear node detection is used to detect whether the detected target carries an electronic device, which avoids manual secondary inquiry, improves the efficiency of security inspection, and reduces labor costs.

[0083] Embodiment 2

[0084] Based on the same inventive concept, an embodiment of the present application further provides a security inspection device, which includes the nonlinear node detection module 1 described in the above-mentioned embodiment 1.

[0085] The form of the security inspection device is not specifically limited in this embodiment, for example, it includes a single door panel with a nonlinear node detection module 1 installed on the door panel, or includes two door panels with a nonlinear node detection module 1 installed on each door panel, etc.

[0086] The detailed implementation process of the embodiment of the present application can refer to the detailed description of the nonlinear node detection module 1 in the above-mentioned embodiment 1, and will not be elaborated here.

[0087] Embodiment 3

[0088] Based on the same inventive concept, an embodiment of the present application further provides a security door, which includes the nonlinear node detection module 1 described in the above-mentioned embodiment 1.

[0089] In the present application, for example, refer to Figures 8 to 16As shown, the security door includes two door panel components 2, each of which includes the nonlinear node detection module 1 in the first embodiment. The antenna component 102 of one door panel component 2 is arranged opposite to the antenna component 102 of the other door panel component 2. For example, referring to Figures 9 to 15 As shown, the antenna plate 101 of the nonlinear node detection module 1 can be a component of the door panel assembly 2 of the security door, combined with Figure 1 , Figure 4 and Figure 7 As shown, the antenna assembly 102 and the nonlinear node detection unit 103 of the nonlinear node detection module 1 are arranged on the front 1011 and the back 1012 of the antenna board respectively. On the security door, the fronts 1011 of the two antenna boards are arranged relative to each other, so that the antenna assemblies 102 on the two antenna boards 101 are facing the inside of the security door, and the nonlinear node detection units 103 on the two antenna boards 101 are facing the outside of the security door. Among them, the antenna assemblies 102 on the left and right door panel assemblies 2 are arranged relative to each other, for example: the number of antenna assemblies 102 on the left and right door panel assemblies 2 is the same, and the heights of the two relatively arranged antenna assemblies 102 can be exactly the same or different (such as the heights of the partial areas of the two antenna assemblies 102 are the same, that is, the two antenna assemblies 102 on both sides are slightly offset in height), which are all within the protection range.

[0090] In a specific embodiment, referring to Figures 1 to 16As shown, the front side 1011 of the antenna board of the nonlinear node detection module 1 faces the inside of the security inspection door, and the back side 1012 faces the outside of the security inspection door. The front side is provided with a first arrangement area 10111, and the back side 1012 is provided with a second arrangement area 10121. The first arrangement area 10111 is provided with a plurality of antenna components 102 (e.g., five), and each antenna component 102 includes a transmitting antenna 1021, a second-order receiving antenna 10221, and a third-order receiving antenna 10222. The second arrangement area 10121 is provided with a plurality of (e.g., five) nonlinear node detection units 103 corresponding to the antenna components 102. The nonlinear node detection unit 103 has the functions of transmitting fundamental wave signals, receiving second harmonic signals, and receiving third harmonic signals. Each nonlinear node detection unit 103 is electrically connected to the transmitting antenna 1021, the second-order receiving antenna 10221 and the third-order receiving antenna 10222 of the corresponding antenna assembly 102, respectively, and is used to drive the transmitting antenna 1021 to transmit the fundamental wave signal, and receive the second harmonic signal returned by the second-order receiving antenna 10221 and the third harmonic signal returned by the third-order receiving antenna 10222, so as to perform signal analysis on the received second harmonic signal and third harmonic signal, thereby detecting the electronic device. Among them, the first antenna assembly 102 at the top of the left door panel assembly 2 is arranged opposite to the first antenna assembly 102 at the top of the right door panel assembly 2. Going down in sequence, the second, third, and fourth antenna assemblies 102 of the left door panel assembly 2 are arranged opposite to the second, third, and fourth antenna assemblies 102 of the right door panel assembly 2, respectively.

[0091] In the embodiment of the present application, the security gate adopts the nonlinear node detection module 1 of the above embodiment. In addition to the above-mentioned effects of the nonlinear node detection module 1, since the transmission power of the transmitting antenna 1021 in the nonlinear node detection module 1 is relatively small, it will not generate any radiation to the human body, has high safety and reliability, and is suitable for the detection of human bodies or packages, and detects whether human bodies or packages carry electronic devices.

[0092] There are several situations in which the position setting methods between the transmitting antenna 1021 and the receiving antenna assembly 1022 in the antenna assembly 102 arranged on the left and right sides of the security door are as follows.

[0093] In one embodiment, referring to Figures 9 to 12As shown, in the security door, in the two relative antenna assemblies 102 arranged on the left and right door panel assemblies 2, the transmitting antenna 1021 of the antenna assembly 102 of one door panel assembly 2 and the receiving antenna assembly 1022 of the relative antenna assembly 102 of the other door panel assembly 2 are arranged relative to each other in the direction of gravity. It should be noted that the transmitting antenna 1021 and the receiving antenna assembly 1022 of the two relative antenna assemblies 102 arranged on the left and right door panel assemblies 2 are arranged relative to each other in the direction of gravity, and the heights of the transmitting antenna 1021 and the receiving antenna assembly 1022 in the direction of gravity can be the same, or the heights of the two in the direction of gravity can partially overlap. Fig.18 and Fig.19 In the two door panel assemblies 2 shown, in the antenna assemblies 102 on the left and right sides, the transmitting antenna 1021 of the antenna assembly 102 on the left is in a diagonal relationship with the transmitting antenna 1021 in the antenna assembly 102 on the right, such as the transmitting antenna 1021 on the left is located at the bottom and the normal direction of the transmitting surface 10212 is obliquely upward, while the transmitting antenna 1021 on the right is located at the top and the normal direction of the transmitting surface 10212 is obliquely downward, such as Fig.19 As shown. In this way, through the joint action of the transmitting antennas 1021 on the left and right sides at different positions, the coverage range of the fundamental wave signal is more uniform, and the fundamental wave signal can enter the inside of the electronic device from the upper end and the lower end of the electronic device, thereby improving the detection sensitivity.

[0094] Of course, in other embodiments, it can be, refer to Fig. 20 As shown, for the antenna components 102 on the left and right sides that are relatively set, the transmitting antenna 1021 in the left door panel component 2 is located at the top and the normal direction of the transmitting surface 10212 is obliquely downward, while the transmitting antenna 1021 in the right door panel component 2 is located at the bottom and the normal direction of the transmitting surface 10212 is obliquely upward. Similarly, the coverage range of the fundamental wave signal can be made more uniform, and the fundamental wave signal can enter the interior of the electronic device from the upper and lower ends of the electronic device, thereby improving the detection sensitivity.

[0095] In another embodiment, referring to Figures 13 to 15As shown, in the security door, in the two opposite four antenna assemblies 102 arranged on the left and right door panel assemblies 2, the transmitting antenna 1021 of the antenna assembly 102 of one door panel assembly 2 and the transmitting antenna 1021 of the antenna assembly 102 of the other door panel assembly 2 are arranged relative to each other in the direction of gravity. In this embodiment, for the two opposite antenna assemblies 102 on the left and right sides, the relative position relationship of the transmitting antenna 1021 and the receiving antenna assembly 1022 is the same. For example, for the opposite antenna assemblies 102 on the left and right sides, the transmitting antenna 1021 is located above the receiving antenna assembly 1022. It should be noted that, for the oppositely arranged left and right antenna assemblies 102, the two transmitting antennas 1021 on the left and right sides are arranged relative to each other, and the heights of the two transmitting antennas 1021 in the direction of gravity can be the same, or the heights of the two can partially overlap in the direction of gravity. Fig.21 and Fig. 22 As shown, the normal directions of the emitting surfaces 10212 of the two transmitting antennas 1021 of the two door panel assemblies 2 which are relatively arranged in the direction of gravity can both be obliquely downward, and the normal directions of the two are symmetrical to each other and both point to the aisle of the security door. In this way, through the joint action of the transmitting antennas 1021 on the left and right sides, the fundamental wave signal can enter the interior of the electronic device from the electronic device, avoiding signal crosstalk in different directions, and improving the detection accuracy of the security door.

[0096] Of course, in other embodiments, it can be, refer to Fig.23 As shown, for the two antenna assemblies 102 on the left and right sides, the transmitting antenna 1021 is located below the receiving antenna assembly 1022. Similarly, the heights of the two transmitting antennas 1021 on the left and right sides in the gravity direction can be the same, or the heights of the two transmitting antennas 1021 in the gravity direction can partially overlap. In this embodiment, the normal directions of the transmitting surfaces 10212 of the two transmitting antennas 1021 are both obliquely upward, and the normal directions of the two are symmetrical and both point to the aisle of the security door, which can also achieve that the fundamental wave signal can enter the interior of the electronic device from the electronic device, avoiding signal crosstalk in different directions, and improving the detection accuracy of the security door.

[0097] In a specific embodiment, in the security door, reference Figures 18 to 23 As shown, the fundamental wave signals emitted by the two groups of transmitting antennas 1021 in the two antenna assemblies 102 arranged opposite to each other on the two antenna boards 101 intersect in the horizontal coverage. The horizontal direction here can be parallel to the direction from the left door panel assembly 2 to the right door panel assembly 2 on the plane at the same height. In the two antenna assemblies 102 arranged opposite to each other on the left and right door panel assemblies 2, the positions of the two groups of transmitting antennas 1021 are not necessarily opposite to each other (such as Fig.19 The two transmitting antennas 1021 are not facing each other, or Fig. 22As shown, the two transmitting antennas 1021 are positioned opposite to each other, and the horizontal coverage ranges of the fundamental wave signals emitted by them all intersect, that is, the fundamental wave signals can cover the range from the left door panel assembly 2 to the right door panel assembly 2 in the security inspection door passage. Thus, the detection of the detection target is realized in each plane direction in the security inspection door, further reducing the missed alarm rate of the security inspection door, and realizing all-round coverage of the detection target.

[0098] Further, the receiving antenna assembly 1022 includes a second-order receiving antenna 10221 and a third-order receiving antenna 10222. In order to receive the second harmonic signal and / or the third harmonic signal generated by the detection target from different directions, in the security gate, refer to Fig. 22 , Fig.23 The coverage ranges of the receiving signals of the two groups of second-order receiving antennas 10221 in the two antenna assemblies 102 arranged opposite to each other on the two antenna boards 101 intersect in the horizontal direction. And / or, the coverage ranges of the receiving signals of the two groups of third-order receiving antennas 10222 in the two antenna assemblies 102 arranged opposite to each other on the two antenna boards 101 intersect in the horizontal direction. The horizontal direction here can be parallel to the direction from the left door panel assembly 2 to the right door panel assembly 2 on the plane at the same height. In the two antenna assemblies 102 arranged opposite to each other on the left and right door panel assemblies 2, the positions of the two groups of second-order receiving antennas 10221 do not matter whether they are relative (such as Fig.19 As shown, the two groups of second-order receiving antennas 10221 are not opposite to each other, or the positions of the two groups of second-order receiving antennas 10221 are opposite to each other), and the coverage ranges of their receiving signals in the horizontal direction intersect, that is, the receiving signal can cover the range from the left door panel assembly 2 to the right door panel assembly 2 in the security door passage; regardless of whether the positions of the two groups of third-order receiving antennas 10222 are opposite to each other (such as Fig.19 The two groups of third-order receiving antennas 10222 shown are not opposite to each other, or the positions of the two groups of third-order receiving antennas 10222 are opposite to each other), and the coverage ranges of their receiving signals in the horizontal direction intersect, that is, the receiving signal can cover the range from the left door panel assembly 2 to the right door panel assembly 2 in the security gate channel.

[0099] In a specific embodiment, referring to Figure 8 As shown, the security door further includes a central controller 3, which is electrically connected to the nonlinear node detection module 1 and is used to control the nonlinear node detection module 1. Based on this, in the embodiment of the present application, the receiving antenna assembly 1022 includes a second-order receiving antenna 10221 and a third-order receiving antenna 10222, and the security door can implement the detection process in the following manner:

[0100] The central controller 3 triggers the nonlinear node detection module 1 to start working. The nonlinear node detection unit 103 generates a fundamental wave signal and radiates it through the corresponding transmitting antenna 1021 of the antenna component 102 to detect the detection target passing through the detection range of the antenna component 102. The detection target can be a person or an object. If the detection target carries an electronic device, the electronic device will generate a second harmonic signal and a third harmonic signal, so that the second-order receiving antenna 10221 of the antenna component 102 will receive the second harmonic signal, and the third-order receiving antenna 10222 of the antenna component 102 will receive the third harmonic signal. The second-order receiving antenna 10221 and the third-order receiving antenna 10222 respectively transmit the received second harmonic signal and third harmonic signal to the nonlinear node detection unit 103. The nonlinear node detection unit 103 processes the signal and transmits it to the central controller 3 for result output.

[0101] In the present application, refer to Figure 7 and Figure 8 As shown, the multiple groups of nonlinear node detection units 103 on each door panel assembly 2 are connected in series and then connected to the central controller 3 , so as to transmit the detection results obtained after signal processing to the central controller 3 .

[0102] In a specific embodiment, the security door also includes a sensor (not shown in the figure), which is connected to the central controller 3 and is used to send a trigger signal to the central controller 3 when sensing a detection target, so as to trigger the nonlinear node detection module 1 to start working through the central controller 3.

[0103] In the embodiment of the present application, the sensor may be an infrared sensor. In addition, based on the multi-directional arrangement of the infrared sensor and the antenna assembly 102, the central controller 3 may use infrared ranging technology and an automatic height matching algorithm to accurately and quickly perform a location alarm on the electronic device carried by the detection target. The specific implementation of the infrared ranging technology and the automatic height matching algorithm may refer to the detailed description in the conventional technology, and is not specifically limited here.

[0104] In a specific embodiment, the security door further includes a display 4 electrically connected to the central controller 3. Specifically, it can be, refer to Figure 8 As shown, the display 4 is a display 4 provided on the central controller 3 , through which the shape image of the detection target can be displayed. When an electronic device is detected, the electronic device is indicated at a corresponding position of the shape image.

[0105] In the embodiment of the present application, since there are both metal nodes and nonlinear nodes in the electronic device, when the detection target passing through the security gate carries an electronic device, the electronic device will radiate a harmonic signal at the same time, so the receiving antenna component 1022 will receive the corresponding harmonic signal. Thus, according to the harmonic signal received by the nonlinear node detection unit 103, it is possible to determine whether the detection target carries an electronic device. In addition, the location alarm of the carried electronic device can be performed on the display 4, and the specific number of electronic devices can be displayed.

[0106] For example, refer to Fig.17 As shown, if the detection target is a human body, when it is determined that the human body is carrying an electronic device, a detection human-shaped image can be displayed on the display 4 of the central controller 3. When an electronic device is detected, the position of the electronic device is marked. Based on the above-mentioned sensor, the number of people passing through the security gate from a preset time can also be counted, such as the number of people passing from a certain time to the current time in a day. When the nonlinear node detection module 1 detects that the human body is carrying an electronic device and issues an alarm, the number of alarms issued from the preset time can also be counted and displayed accordingly. In the embodiment of the present application, the display 4 can also display the current date and time. And in order to facilitate the operator to interact with the security gate, operation buttons, such as configuration buttons, can also be displayed on the display 4, and the operator can set and maintain the security gate.

[0107] In a specific embodiment, referring to Figure 2 or Figure 5As shown, the transmitting antenna 1021 is provided with four first antenna elements 10211, that is, each antenna assembly 102 is provided with eight first antenna elements 10211. The second-order receiving antenna 10221 is provided with eight second antenna elements 102211, and the third-order receiving antenna 10222 is also provided with eight third antenna elements 102221. By selecting first antenna elements 10211 of suitable specifications and reasonably arranging the positions of each first antenna element 10211 on the antenna board 101, it can be achieved that the coverage range of the lobe diagram of the fundamental wave signal emitted by the transmitting antenna 1021 of the adjacent antenna assembly 102 of a single door panel assembly 2 intersects in the gravity direction, and the coverage range of the lobe diagram of the fundamental wave signal emitted by the transmitting antenna 1021 of the opposite antenna assembly 102 of the two door panel assemblies 2 of the security door intersects in the horizontal direction. By selecting a second antenna element 102211 and a third antenna element 102221 of suitable specifications and reasonably arranging the positions of each second antenna element 102211 and each third antenna element 102221 on the antenna plate 101, it is possible to achieve that the coverage ranges of the second-order receiving antennas 10221 on the antenna assemblies 102 relative to the two door panel assemblies 2 of the security door intersect in the horizontal direction, and it is also possible to achieve that the coverage ranges of the third-order receiving antennas 10222 on the antenna assemblies 102 relative to the two door panel assemblies 2 of the security door intersect in the horizontal direction.

[0108] In the embodiment of the present application, by arranging multiple antenna components 102 on the antenna board 101, the detection area in the security door is divided into multiple detection grids, and the multiple antenna components 102 on the two door panel components 2 will fully cover the detection target, reducing the missed alarm rate of the security door. When the detection target passes through the security door, if each nonlinear node detection unit 103 receives a harmonic signal, it can quickly complete the electronic device detection of each detection grid in the detection area according to the received signal of different nonlinear node detection units 103, combined with the position of its corresponding antenna component 102, to determine whether the detection target carries an electronic device. When the detection target carries an electronic device, the position of the electronic device in the detection target is quickly locked, and the location alarm is performed on the electronic device carried by the detection target.

[0109] In one embodiment, referring to Fig.16As shown, the door panel assembly 2 of the security door also includes two chassis fixing beams 201 arranged at the upper end of the antenna plate 101 and spaced apart by a preset height. Therefore, there are four chassis fixing beams 201 on the security door, the left end of the central controller 3 is fixed between the two chassis fixing beams 201 of the left door panel assembly 2, and the right end of the central controller 3 is fixed between the two chassis fixing beams 201 of the right door panel assembly 2. By fixing the left and right ends of the central controller 3 to the corresponding two chassis fixing beams 201, the central controller 3 is used as the top frame of the security door to form a "door" type structure of the security door. In the embodiment of the present application, the material of the chassis shielding plate 202 can be selected according to actual needs, for example, it can be an aluminum profile. In the embodiment of the present application, the central controller 3 can be fixed to the chassis fixed beam 201 by bolts. Of course, in some other optional methods, the central controller 3 can also be fixed to the chassis fixed beam 201 by fixing glue. The fixing method between the central controller 3 and the chassis fixed beam 201 can also be implemented according to the fixing method described in detail in the conventional technology.

[0110] In the embodiment of the present application, the assembly of the security door can be realized by fixing the chassis fixing beam 201 of the door panel assembly 2 with the central controller 3, and the installation is convenient and flexible. The security door is assembled from three modules, namely, two door panel assemblies 2 and one central controller 3, and can be embedded in the building or set in the security inspection channel according to actual needs.

[0111] In a specific embodiment, referring to Fig.16 As shown, the door panel assembly 2 also includes a chassis shielding plate 202. The chassis shielding plate 202 is arranged between the central controller 3 and the antenna assembly 102. Fig.16 As shown, the chassis shielding plate 202 is arranged at the bottom end of the central controller 3, so that during the detection process of the security gate, the fundamental signal emitted by the transmitting antenna 1021 of the antenna assembly 102 and the harmonic signal generated by the detection target are shielded, thereby avoiding or reducing signal interference to the central controller 3.

[0112] In a specific embodiment, referring to Fig.24 As shown, the door panel assembly 2 also includes an inner cover plate 203 and an outer cover plate (not shown in the figure). The inner cover plate 203 and the outer cover plate cover the front 1011 and the back 1012 of the antenna board respectively. In the embodiment of the present application, the inner cover plate 203 is set on the front 1011 of the antenna board, and the antenna components 102 on the antenna board 101 are covered by the inner cover plate 203 to achieve protection for each antenna component 102, and the outer cover plate is set on the back 1012 of the antenna board 101, and the nonlinear node detection units 103 on the antenna board 101 are covered by the outer cover plate to achieve protection for each nonlinear node detection unit 103.

[0113] In a specific embodiment, referring to Fig.24 As shown, the door panel assembly 2 also includes vertical beams 204 arranged on the left and right sides of the antenna plate 101.

[0114] The vertical beam 204 covers the outer ends of the inner cover plate 203 and the outer cover plate, thereby fixing the inner cover plate 203 and the outer cover plate. Fig.24 As shown, the security door may also include an alarm light 205, which is electrically connected to the central controller 3. Specifically, it may be, refer to Fig.24 As shown, the alarm light 205 can be a light bar embedded in the outer side of the vertical beam 204. The light bar is controlled to alarm through the central controller 3. When the security door determines that the detection target carries an electronic device, the central controller 3 can control the light bar to be always on or flash to realize the alarm function.

[0115] In a specific embodiment, referring to Fig.24 As shown, the door panel assembly 2 further includes a top beam cover plate 206 .

[0116] The top beam cover plate 206 is disposed on the top of the antenna board 101 and covers the upper end of the vertical beam 204 .

[0117] In a specific embodiment, referring to Fig.24 As shown, the door panel assembly 2 also includes a base 207. The antenna board 101 is vertically mounted on the base 207. Fig.24 As shown, a base 207 is respectively provided at the bottom of the two sets of door panel assemblies 2 of the security door, and the door panel assemblies 2 are placed vertically through the base 207. In some optional embodiments, wheels, such as universal wheels, can be provided below the base 207. Furthermore, the wheels can be raised and lowered. When the security door needs to be moved, the wheels are controlled to extend out of the base 207, so that the security door can be moved conveniently. When the security door is moved to a predetermined position, the wheels are controlled to rise and retract inside the base 207, so that the base 207 contacts the ground, thereby realizing the fixed placement of the security door.

[0118] In a specific embodiment, referring to Figure 8 As shown, the security door also includes a floor mat 208. The floor mat 208 is arranged at the bottom end of the base 207 of the two door panel assemblies 2.

[0119] In one embodiment, the door panel assembly 2 also includes an absorbing material and / or a metal shell arranged at the bottom and / or side of the antenna assembly 102. For example, an absorbing material is arranged on the front of the antenna plate 101 and the bottom of the antenna assembly 102, or an absorbing material is arranged on the back 1012 of the antenna plate 101, the vertical cladding beam 204, the base 207, and the top beam cover plate 206 to prevent the electromagnetic wave signal from radiating outside the security door, and also to prevent the electronic equipment outside the security door from interfering with the detection results. Furthermore, in order to improve the stability of the security door, a metal shell (not shown in the figure, for example, the outer cover plate is a metal shell) is also arranged on the outer side of the absorbing material to reflect the electromagnetic waves into the channel of the security door. In this embodiment, the absorbing material used can be a material in conventional technology, for example, an absorbing adhesive film. The material used for the metal shell can be selected according to actual conditions, for example, aluminum or aluminum alloy material.

[0120] In a specific embodiment, a speaker (not shown in the figure) may also be provided in the central controller 3 of the security gate. When the security gate determines that the detection target carries an electronic device, the central controller 3 may control the speaker to play a sound to realize an alarm function.

[0121] In the security inspection door provided in the embodiment of the present application, the receiving surface 10223 of the receiving antenna assembly 1022 faces the transmitting antenna 1021 and is obliquely arranged on the antenna board 101, and the transmitting surface 10212 of the transmitting antenna 1021 faces the receiving antenna assembly 1022 and is obliquely arranged on the antenna board 101, and the receiving antenna assembly 1022 and the transmitting antenna 1021 are at different heights in the direction of gravity. In this way, the wave coverage ranges of the transmitting antenna 1021 and the receiving antenna assembly 1022 will have more intersecting parts, and because the transmitting antenna 1021 and the receiving antenna assembly 1022 are inclined to face each other, it is convenient for the receiving antenna assembly 1022 to receive the harmonic signal reflected from the detection target corresponding to the transmitting antenna 1021, thereby improving the detection reliability and detection efficiency. In addition, since the transmitting surface 10212 of the transmitting antenna 1021 and the receiving surface 10223 of the receiving antenna assembly 1022 are both tilted, the fundamental wave signal emitted by the transmitting antenna 1021 can enter the inside of the electronic device from the top and bottom in addition to from the front, and the receiving antenna assembly 1022 can also receive harmonic signals reflected from multiple directions (such as the front, top, and bottom), which can further reduce the missed detection rate. The electronic device can be detected by analyzing the harmonic signal fed back by the received detection target, which can improve the detection accuracy, reduce the false alarm rate of security inspection, ensure the reliability of detection, and is not only applicable to the detection of electronic devices with larger volumes, but also to the detection of small electronic devices such as mobile phones. Moreover, the principle of nonlinear node detection is used to detect whether the detected target carries an electronic device, which avoids manual secondary inquiry, improves the efficiency of security inspection, and reduces labor costs.

[0122] The security door provided in the embodiment of the present application realizes detection of electronic equipment. The security door has a simple structure and is easy to assemble. In addition, since the transmission power of the transmitting antenna 1021 in the nonlinear node detection module 1 of the security door is relatively small, it will not generate any radiation to the human body. It has high safety and reliability, and improves the efficiency of security inspection.

[0123] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", as explained by "including" used as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

Claims

1. A nonlinear node detection module, characterized in that: It includes an antenna board, an antenna assembly and a nonlinear node detection unit; The antenna assembly and the nonlinear node detection unit are both arranged on the antenna board; The antenna assembly includes a transmitting antenna and a receiving antenna assembly electrically connected to the nonlinear node detection unit respectively; The antenna board is provided with a plurality of antenna components in sequence along the direction of gravity.

2. The nonlinear node detection module according to claim 1, characterized in that: The receiving surface of the receiving antenna assembly faces the transmitting antenna and is obliquely arranged on the antenna board. The transmitting surface of the transmitting antenna faces the receiving antenna assembly and is obliquely arranged on the antenna board. The receiving antenna assembly and the transmitting antenna are at different heights in the direction of gravity.

3. The nonlinear node detection module according to claim 2, characterized in that: The distance between the bottom end of the emitting surface and the center of the receiving surface is smaller than the distance between the top end of the emitting surface and the center of the receiving surface; the distance between the bottom end of the receiving surface and the center of the emitting surface is smaller than the distance between the top end of the receiving surface and the center of the emitting surface.

4. The nonlinear node detection module according to claim 2, characterized in that: The angle between the receiving surface of the receiving antenna assembly and the antenna board is 45°, and / or the angle between the transmitting surface of the transmitting antenna and the antenna board is 45°.

5. The nonlinear node detection module according to any one of claims 2 to 4, characterized in that: The coverage ranges of the fundamental wave signals transmitted by the transmitting antennas in two adjacent antenna assemblies intersect in the direction of gravity.

6. The nonlinear node detection module according to claim 5, characterized in that: An antenna fixing bracket is arranged on the antenna board; the transmitting antenna in one of the antenna assemblies is installed on one side of the antenna fixing bracket, and the receiving antenna assembly in another antenna assembly is installed on the other side of the antenna fixing bracket.

7. The nonlinear node detection module according to claim 6, characterized in that: The receiving antenna assembly includes a second-order receiving antenna and a third-order receiving antenna; The second-order receiving antenna is closer to the antenna board than the third-order receiving antenna; or, The third-order receiving antenna is closer to the antenna board than the second-order receiving antenna.

8. The nonlinear node detection module according to any one of claims 1 to 4, characterized in that: The transmitting antenna includes a plurality of first antenna elements, and the width of the coverage range of fundamental wave signals emitted by all the first antenna elements in the horizontal direction is less than or equal to the width of the antenna board.

9. A security inspection device, characterized in that: It comprises the nonlinear node detection module as described in any one of claims 1-8.

10. A security door, characterized in that: It comprises two door panel assemblies, each of which comprises the nonlinear node detection module as described in any one of claims 1 to 8; the antenna assembly of one of the door panel assemblies is arranged relative to the antenna assembly of the other door panel assembly.

11. The security door according to claim 10, characterized in that: In the two door panel assemblies, the transmitting antenna in the antenna assembly of one door panel assembly and the receiving antenna assembly in the antenna assembly opposite to the other door panel assembly are arranged opposite to each other in the direction of gravity; or, The transmitting antennas in the antenna assemblies opposite to each other in the two door panel assemblies are arranged opposite to each other in the direction of gravity.

12. The security door according to claim 10, characterized in that: The coverage ranges of the fundamental wave signals transmitted by the two groups of transmitting antennas in the two antenna assemblies arranged opposite to each other on the two antenna boards intersect in the horizontal direction.

13. The security door according to claim 10, characterized in that: The receiving antenna assembly includes a second-order receiving antenna and a third-order receiving antenna; the receiving signals of two groups of the second-order receiving antennas in two antenna assemblies arranged opposite to each other on the two antenna boards intersect in the horizontal coverage range; and / or, The coverage areas of the receiving signals of the two groups of the third-order receiving antennas in the two antenna assemblies arranged opposite to each other on the two antenna boards intersect in the horizontal direction.

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