Door plate assembly and pass-type detection device applying same

Abstract

The utility model discloses a door plate assembly and a pass-type detection device using the same, and solves the problem of how to facilitate zero setting of a receiving coil. The door plate assembly comprises a receiving coil unit, a transmitting coil unit and a door plate, the receiving coil unit is installed on the first side face of the door plate, and the transmitting coil unit is installed on the second side face of the door plate. According to the utility model, the receiving coil unit and the transmitting coil unit are respectively positioned on different side surfaces of the door plate, so that the receiving coil unit is not influenced by the transmitting coil unit when being zeroed.

Description

Technical Field

[0001] The utility model belongs to the technical field of through-type detection, and particularly relates to a door panel assembly and a through-type detection device applying the same. Background Art

[0002] At present, for the two side door panels of a through-type detection device, a transmitting coil and a receiving coil are arranged on each side door panel. How to reasonably arrange the transmitting coil and the receiving coil to facilitate zeroing of the receiving coil is an urgent problem to be solved. Summary of the Utility Model

[0003] The purpose of the embodiment of the utility model is to provide a door panel assembly and a through-type detection device applying the same, which can facilitate zeroing of the receiving coil.

[0004] To achieve the above purpose, the technical solution of the embodiment of the utility model is realized as follows: A door panel assembly includes a receiving coil unit, a transmitting coil unit and a door panel. The receiving coil unit is installed on a first side surface of the door panel, the transmitting coil unit is installed on a second side surface of the door panel. The first side surface and the second side surface are two opposite side surfaces on the door panel, and the first side surface and the second side surface are non-coplanar.

[0005] In some embodiments, the projection of the receiving coil unit on the door panel is located within the projection of the transmitting coil unit on the door panel.

[0006] In some embodiments, the receiving coil unit includes a plurality of receiving coil groups arranged at intervals in the vertical direction.

[0007] In some embodiments, each receiving coil group includes two receiving coils arranged at intervals in the horizontal direction.

[0008] In some embodiments, the extending direction of each receiving coil is the vertical direction.

[0009] In some embodiments, the transmitting coil unit includes a plurality of first vertical current-carrying wires, a plurality of second vertical current-carrying wires and a plurality of horizontal current-carrying wires; each of the first vertical current-carrying wires is arranged along a first vertical end of the second side surface, and each of the second vertical current-carrying wires is arranged along a second vertical end of the second side surface; each of the horizontal current-carrying wires is arranged in sequence in the vertical direction.

[0010] In some embodiments, in the receiving coil group, the distance between the projection of the center of the first receiving coil on the second side surface and the first vertical current-carrying wire is less than the distance from the second vertical current-carrying wire; the distance between the projection of the center of the second receiving coil on the second side surface and the second vertical current-carrying wire is less than the distance from the first vertical current-carrying wire.

[0011] In some embodiments, the distance between the projection of the first receiving coil on the second side surface and the first vertical current-carrying wire is 50 - 100 mm;

[0012] and / or, the distance between the projection of the second receiving coil on the second side surface and the second vertical current-carrying wire is 50 - 100 mm.

[0013] In some embodiments, the projection of the center of each receiving coil on the second side surface is at a distance less than a set threshold from at least one of the horizontal current-carrying wires.

[0014] To achieve the above object, another technical solution of the present utility model is implemented as follows: A through-type detection device includes two sets of the door panel assemblies as described above, and a detection channel is provided between the two sets of door panel assemblies. The first side surface of the door panel faces the detection channel.

[0015] In the embodiments of the present utility model, the receiving coil unit and the transmitting coil unit are respectively located on different side surfaces of the door panel. Thus, when physically zeroing the receiving coil unit, it will not be affected by the transmitting coil unit, and higher detection sensitivity can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an exploded view of the door panel assembly provided in Embodiment 1 of the present utility model;

[0017] Figure 2 is a structural schematic diagram of the door panel assembly provided in Embodiment 1 of the present utility model;

[0018] Figure 3 is Figure 2 the left view of;

[0019] Figure 4 is Figure 2 the right view of;

[0020] Figure 5 is a structural schematic diagram of the door panel assembly provided in Embodiment 1 of the present utility model with the door panel removed;

[0021] Figure 6 is a side view structural schematic diagram of the receiving coil provided in Embodiment 1 of the present utility model;

[0022] Figure 7 is a structural schematic diagram of the through-type detection device provided in Embodiment 2 of the present utility model.

[0023] In the figure, 1. Door panel assembly, 11. Receiver coil unit, 111. Receiver coil group, 1111. Receiver coil, 11111. Fitting, 11112. Wire, 12. Transmitter coil unit, 121. First vertical current-carrying wire, 122. Second vertical current-carrying wire, 123. Horizontal current-carrying wire, 13. Door panel, 131. First side, 132. Second side, 133. Hole, 134. Notch, 2. Detection channel, 14. Fastening piece. Detailed implementation mode

[0024] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the following further details the present utility model in combination with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] In the description of the present utility model, it should be clear that the terms "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "horizontal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present utility model and does not mean that the indicated device or element must have a specific orientation or position. Therefore, it should not be construed as a limitation to the present utility model. In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] Embodiment 1

[0027] A door panel assembly 1 provided in Embodiment 1 of the present utility model, as Figure 1 and Figure 2 shown, includes a receiver coil unit 11, a transmitter coil unit 12, and a door panel 13. The receiver coil unit 11 is installed on the first side 131 of the door panel 13, and the transmitter coil unit 12 is installed on the second side 132 of the door panel 13.

[0028] The door panel assembly 1 in Embodiment 1 can be applied to a through-type detection device, etc., for detecting metals, contraband, etc. The first side 131 and the second side 132 are arranged parallel and opposite to each other. When the door panel assembly 1 is applied to a through-type detection device, the first side 131 can face the detection channel of the through-type detection device, and the second side 132 is away from the detection channel. The transmitting coil unit 12 generates, for example, an electromagnetic field covering the detection channel of the through-type detection device. When the object to be detected passes through the detection channel, a corresponding induction signal will be generated, and the receiving coil unit 11 receives this induction signal to facilitate the detection of the object to be detected. The receiving coil unit 11 can include a plurality of receiving coils, and the transmitting coil unit 12 can include a plurality of transmitting coils.

[0029] To ensure the detection accuracy, it is necessary to zero the receiving coil unit 11. The purpose of zeroing is to make the value output by the receiving coil unit 11 meet the requirements when no object to be detected passes through, that is, to make the initial state of the receiving coil unit 11 meet the requirements, so as to ensure the accuracy of detecting the object to be detected. If zeroing is achieved by moving the position of the receiving coils in the receiving coil unit 11, and if the transmitting coil unit 11 and the receiving coil unit 12 are arranged on the same side, then the receiving coil unit 12 needs to be arranged on the transmitting coil unit 11. When zeroing the receiving coil unit 11, by adjusting the position of the receiving coils in the receiving coil unit 11, it will be affected by the transmitting coil unit 12. That is, due to the existence of the transmitting coil unit 12, the mounting surface where the receiving coil unit 11 is located is not flat but uneven, which will lead to low zeroing efficiency and low accuracy. In Embodiment 1 of the present invention, the receiving coil unit 11 and the transmitting coil unit 12 are located on different sides of the door panel 13. When zeroing the receiving coil unit 11, since the transmitting coil unit 12 and the receiving coil unit 11 are on different sides of the door panel 13, the receiving coil unit 11 will not be affected by the transmitting coil unit 12 during zeroing, which is more convenient for zeroing and can improve the efficiency and effect of zeroing. In the specific implementation process of Embodiment 1, as Figure 1 shown, further, the projection of the receiving coil unit 11 on the door panel 13 is located within the projection of the transmitting coil unit 12 on the door panel 13.

[0030] Among them, the projection of the receiving coil unit 11 on the door panel 13 being located within the projection of the transmitting coil unit 12 on the door panel 13 can enable the receiving coil unit 11 and the transmitting coil unit 12 to have a larger overlapping area. In this way, the receiving coil unit 11 can receive more magnetic induction lines, thereby improving the sensitivity of the receiving coil unit 11.

[0031] As Figure 5As shown, the projection of the receiving coil unit 11 on the door panel 13 is located within the projection of the transmitting coil unit 12 on the door panel 13. The specific description is as follows: If the door panel 13 is removed and the transmitting coil unit 12 and the receiving coil unit 11 are moved to the same side, the receiving coil unit 11 is located within the area where the transmitting coil unit 12 is located.

[0032] Furthermore, as Figure 3 and Figure 4 shown, a notch 134 can be provided on one side of the door panel 13. When the door panel assembly 1 is assembled to the through-type detection device later, other components can be placed as needed at the corresponding position of the notch 134.

[0033] In the specific implementation process of this Embodiment 1, as Figure 3 、 Figure 7 shown, the receiving coil unit 11 includes a plurality of receiving coil groups 111 arranged at intervals in the vertical direction.

[0034] In the specific implementation process of this Embodiment 1, as Figure 3 、 Figure 7 shown, each receiving coil group 111 includes two receiving coils 1111 arranged at intervals in the horizontal direction.

[0035] More specifically, the number of the receiving coil groups 111 is not limited to only the number of the receiving coil groups 111 in Figure 1 . Regarding the plurality of receiving coil groups 111 arranged at intervals in the vertical direction, the vertical direction is parallel to the gravity direction (i.e., the Z-axis), and the receiving coil groups 111 are arranged in sequence from high to low. In this way, all the receiving coil groups 111 can cover a relatively wide height range, so as to be able to expand the detection range of the door panel assembly 1 in the vertical direction, and the number of the receiving coil groups 111 can be set according to the detection range requirement of the door panel assembly 1 in the vertical direction.

[0036] Regarding each receiving coil group 111 including two receiving coils 1111 arranged at intervals in the horizontal direction, if the door panel assembly 1 is applied to a through-type detection device, this horizontal direction is parallel to the passing direction of the detection channel (i.e., the Y-axis). In other words, the two receiving coils 1111 are located at different positions along the passing direction. In this way, along the passing direction, each receiving coil group 111 can cover a relatively wide range, so as to be able to ensure a relatively wide detection range along the passing direction and avoid false negatives.

[0037] In this embodiment, when the object to be measured is not present, the two receiving coils 1111 are in a balanced state, and there is no induced voltage at the output end of the receiving coil group 111. When the object to be measured appears, the eddy current excited on its surface will change the balance state of the two receiving coils 1111. At this time, the receiving coil group 111 will output an induced voltage at the output end, and thus the object to be measured can be detected very sensitively.

[0038] In this embodiment, if the receiving coil unit 11 needs to be zeroed, the transmitting coil unit 12 is energized, and it is ensured that there is no object to be measured in the detection channel. For each receiving coil group 111, the output end is connected to an oscilloscope. One receiving coil 1111 can be fixed in position, and the position of the other receiving coil 1111 relative to the fixed receiving coil 1111 is moved until the voltage displayed at the output end is zero. At this time, the receiving coil group 111 is in a balanced state, and the zeroing is completed.

[0039] Among them, each receiving coil 1111 can extend in the vertical direction, or in the horizontal direction (i.e., the passing direction of the detection channel), or extend obliquely relative to the vertical direction. The extension referred to here means the extension direction of the side where the relatively long side of the receiving coil 1111 is located. If the shape of the receiving coil 1111 is rectangular, it means that the extension direction of the long side is the vertical direction, or the horizontal direction, or obliquely relative to the vertical direction.

[0040] In the specific implementation process of this Embodiment 1, as Figure 3 shown, the extension direction of each of the receiving coils 1111 is the vertical direction.

[0041] More specifically, when the extension direction of each of the receiving coils 1111 is the vertical direction, more detection data in the vertical direction, that is, the Z-axis direction, can be obtained, making the door panel assembly 1 highly sensitive.

[0042] Furthermore, the shape of the receiving coil 1111 is oval, rectangular or polygonal, as long as it can ensure that the projected area of the receiving coil 1111 is within the transmitting coil unit 12. As Figure 5 、 Figure 6 shown, the receiving coil 1111 includes a fitting 11111 and a wire 11112. In Embodiment 1, the fitting 11111 includes, for example, two opposite vertical sides and two opposite arc sides. Such a setting not only facilitates winding the wire 11112, but also enables the wire 11112 to closely adhere to the fitting 11111 without causing damage to the wire 11112.

[0043] In the specific implementation process of this Embodiment 1, as Figure 4As shown, the transmitting coil unit 12 includes a plurality of first vertical current-carrying wires 121, a plurality of second vertical current-carrying wires 122, and a plurality of horizontal current-carrying wires 123. Each of the first vertical current-carrying wires 121 is arranged along the first vertical end of the second side surface 132, and each of the second vertical current-carrying wires 122 is arranged along the second vertical end of the second side surface 132. Each of the horizontal current-carrying wires 123 is arranged in sequence in the vertical direction.

[0044] More specifically, the first vertical current-carrying wires 121 and the second vertical current-carrying wires 122 are arranged in parallel and are both perpendicular to the horizontal current-carrying wires 123. All the first vertical current-carrying wires 121, all the second vertical current-carrying wires 122, the uppermost horizontal current-carrying wire 123, and the lowermost horizontal current-carrying wire 123 together enclose a rectangular area. The projection of the receiving coil unit 11 on the door panel 13 is, for example, located within the projection of this rectangular area on the door panel 13. The first vertical end of the second side surface 132 is, for example, the end far from the notch 134, and the second vertical end of the second side surface 132 is, for example, the end provided with the notch 134. Then the first vertical end and the second vertical end are in the Z-axis direction and are located at both ends of the second side surface 132.

[0045] Furthermore, a fixing member 14 for fixing the transmitting coil unit 12 is provided on the door panel 13, such as Figure 2 , Figure 4 As shown, the fixing member 14 is provided on the second side surface 132 of the door panel 13, and the transmitting coil unit 12 is fixedly arranged on the second side surface 132 through the fixing member 14. The fixing member 14 can be a screw, a bolt, or other components that play a fixing role. The fixing members 14 are arranged along the first vertical end and the second vertical end, and the fixing members 14 along the first vertical end and the fixing members 14 along the second vertical end correspond to each other in the horizontal direction. The wires of the transmitting coil unit 12 are wound around the fixing members 14. The plurality of first vertical current-carrying wires 121, the plurality of second vertical current-carrying wires 122, and the plurality of horizontal current-carrying wires 123 are fixed by being fixed on the fixing members 14. Each first vertical current-carrying wire 121 is fixed on the first vertical end of the second side surface 132 through the fixing member 14, thereby ensuring that each of the first vertical current-carrying wires 121 can be located on the same straight line in the vertical direction. Each second vertical current-carrying wire 122 is fixed on the second vertical end of the second side surface 132 through the fixing member 14. Thereby ensuring that each of the second vertical current-carrying wires 122 can be located on the same straight line in the vertical direction and is parallel to the first vertical current-carrying wires 121. Each horizontal current-carrying wire 123 passes through the fixing members 14 that correspond to each other in the horizontal direction, making the plurality of horizontal current-carrying wires 123 parallel. The setting of the fixing member 14 not only plays a fixing role but also plays a role in limiting the horizontal and vertical degrees of the transmitting coil unit 12.

[0046] Furthermore, as Figure 3 - Figure 4As shown, a hole 133 is also provided on the door panel 13. The hole 133 facilitates connecting each group of receiving coil groups 111 to the control device of the through-type detection device through wires.

[0047] In the specific implementation process of this Embodiment 1, as Figure 5 shown, in the receiving coil group 111, the distance between the projection of the center of the first receiving coil 1111 on the second side surface 132 and the first vertical current-carrying wire 121 is less than the distance from the second vertical current-carrying wire 122. The distance between the projection of the center of the second receiving coil 1111 on the second side surface 132 and the second vertical current-carrying wire 122 is less than the distance from the first vertical current-carrying wire 121.

[0048] More specifically, each of the first vertical current-carrying wires 121 is arranged along the first vertical end of the second side surface 132, and each of the second vertical current-carrying wires 122 is arranged along the second vertical end of the second side surface 132. Each of the horizontal current-carrying wires 123 is arranged in sequence in the vertical direction, which can make the receiving coil 1111 as close as possible to the vertical current-carrying wire of the transmitting coil unit 12, and make the receiving coil 1111 and the transmitting coil have more overlapping areas. In Figure 5 it, the distance between the projection of the center of the first receiving coil 1111 on the second side surface 132 and the first vertical current-carrying wire 121 is less than the distance from the second vertical current-carrying wire 122, that is Figure 5 the left receiving coil 1111 in it is as close as possible to the first vertical current-carrying wire 121, and at the same time, the projection of the left receiving coil 1111 is located within the transmitting coil unit 12. Similarly, the distance between the projection of the center of the second receiving coil 1111 on the second side surface 132 and the second vertical current-carrying wire 122 is less than the distance from the first vertical current-carrying wire 121, that is Figure 5 the right receiving coil 1111 in it is as close as possible to the second vertical current-carrying wire 122, and at the same time, the projection of the right receiving coil 1111 is located within the transmitting coil unit 12. The first receiving coil 1111 and the second receiving coil 1111 are close to the vertical current-carrying wire to improve the receiving sensitivity of the receiving coil unit 11 in the Y-axis direction.

[0049] In the specific implementation process of this Embodiment 1, as Figure 5 shown, the distance between the first receiving coil 1111 and the first vertical current-carrying wire 121 is 50 - 100 mm.

[0050] And / or, the distance between the second receiving coil 1111 and the second vertical current-carrying wire 122 is 50 - 100 mm.

[0051] More specifically, the above description includes the following three parallel schemes.

[0052] The first solution: The distance between the first receiving coil 1111 and the first vertical current-carrying wire 121 is 50 - 100 mm.

[0053] The second solution: The distance between the second receiving coil 1111 and the second vertical current-carrying wire 122 is 50 - 100 mm.

[0054] The third solution: The distance between the first receiving coil 1111 and the first vertical current-carrying wire 121 is 50 - 100 mm and the distance between the second receiving coil 1111 and the second vertical current-carrying wire 122 is 50 - 100 mm.

[0055] The first receiving coil 1111 needs to be arranged as close as possible to the first vertical current-carrying wire 121. For example, Figure 5 the distance between the left receiving coil 1111 and the first vertical current-carrying wire 121 is A, and the second receiving coil 1111 needs to be arranged as close as possible to the second vertical current-carrying wire 122. The distance between the right receiving coil 1111 and the second vertical current-carrying wire 122 is B. Both A and B can be 50 - 100 mm, which can ensure that the door panel assembly 1 has a high receiving sensitivity in the Y-axis direction.

[0056] In the specific implementation process of this Embodiment 1, as Figure 5 shown, the projection of the center of each receiving coil 1111 on the second side 132 is at least less than a set threshold distance from at least one of the horizontal current-carrying wires 123.

[0057] More specifically, the arrangement of each receiving coil 1111 needs to consider the position of the horizontal current-carrying wire 123 in the transmitting coil unit 12, so that each receiving coil group 111 is close to the horizontal current-carrying wire 123, that is, each receiving coil group 111 is at the position with the best sensitivity in the Z-axis direction. For example: Figure 5 shown, the transmitting coil unit 12 includes a total of eight horizontal current-carrying wires 123, and the receiving coil unit 11 includes a total of six groups of receiving coil groups 111. Each group of receiving coil groups 111 is close to one of the horizontal current-carrying wires 123, that is, except for the two horizontal current-carrying wires 123 at the uppermost and lowermost ends, the projections of the six middle horizontal current-carrying wires 123 on the door panel 13 are respectively close to the projections of one group of receiving coil groups 111 on the door panel 13.

[0058] The working principle provided by Embodiment 1 of the present utility model is as follows: The receiving coil unit 11 and the transmitting coil unit 12 are respectively arranged on different sides of the door panel 13. The height of the receiving coil groups 111 arranged at intervals in the vertical direction is set according to requirements so that it is located at the optimal position of the sensitivity in the Z-axis direction. In each receiving coil group 111, the first receiving coil 1111 needs to be as close as possible to the first vertical current-carrying wire 121, and the second receiving coil 1111 needs to be as close as possible to the second vertical current-carrying wire 122. The distance is set at 50 - 100 mm, which can ensure that the door panel assembly 1 has a high receiving sensitivity in the Y-axis direction.

[0059] Embodiment 2

[0060] A through-type detection device provided by Embodiment 2 of the present utility model, as Figure 7 shown, includes two groups of door panel assemblies 1 described in Embodiment 1, and a detection channel 2 is provided between the two groups of door panel assemblies 1.

[0061] After adopting the above scheme, when the door panel assembly 1 in Embodiment 1 is used in a through-type detection device, it can improve the sensitivity of the through-type detection device, and it is convenient to zero the receiving coil unit 11 without being affected by the transmitting coil unit 12.

[0062] In the specific implementation process of this Embodiment 2, as Figure 7 shown, the first side 131 of the door panel 13 faces the detection channel 2.

[0063] More specifically, the first side 131 faces the detection channel 2 of the through-type detection device. The magnetic field that the receiving coil unit 11 can sense is stronger, and the receiving distance is short, having higher sensitivity and reducing the false alarm rate.

[0064] Furthermore, the through-type detection device further includes a display device, a display device, and a control device connected to both the display device and the transmitting coil unit 12 and the receiving coil unit 11. The display device includes at least one of a thermal imaging display, an infrared temperature sensor, or an alarm indicator light. The display device is used to display the detection content in the detection channel 2, and the control device is used to control the transmitting coil unit 12 and the receiving coil unit 11.

[0065] The working principle provided by Embodiment 2 of the present utility model is as follows: The door panel assembly 1 is installed in the through-type detection device, and the first side 131 of the door panel 13 faces the detection channel 2. The magnetic field that the receiving coil unit 11 can sense is stronger, and the receiving distance is short, having higher sensitivity and reducing the false alarm rate.

[0066] In summary, the receiving coil unit 11 and the transmitting coil unit 12 provided in the embodiments of the present utility model are respectively located on different sides of the door panel 13, which also facilitates the zero adjustment of the receiving coil unit 11 without being affected by the transmitting coil unit 12.

[0067] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A door panel assembly, characterized in that: The invention comprises a receiving coil unit (11), a transmitting coil unit (12) and a door panel (13); the receiving coil unit (11) is installed on a first side surface (131) of the door panel (13); the transmitting coil unit (12) is installed on a second side surface (132) of the door panel (13); the first side surface (131) and the second side surface (132) are two side surfaces arranged opposite to each other on the door panel (13); and the first side surface (131) and the second side surface (132) are not coplanar.

2. The door panel assembly according to claim 1, characterized in that: The projection of the receiving coil unit (11) on the door panel (13) is located within the projection of the transmitting coil unit (12) on the door panel (13).

3. The door panel assembly according to claim 1, characterized in that: The receiving coil unit (11) comprises a plurality of receiving coil groups (111) arranged at intervals in a vertical direction.

4. The door panel assembly according to claim 3, characterized in that: Each receiving coil group (111) comprises two receiving coils (1111) arranged at intervals in a horizontal direction.

5. The door panel assembly according to claim 4, characterized in that: The extending direction of each receiving coil (1111) is a vertical direction.

6. The door panel assembly according to claim 4, characterized in that: The transmitting coil unit (12) comprises a plurality of first vertical conducting wires (121), a plurality of second vertical conducting wires (122) and a plurality of horizontal conducting wires (123); each of the first vertical conducting wires (121) is arranged along a first vertical end of the second side surface (132), and each of the second vertical conducting wires (122) is arranged along a second vertical end of the second side surface (132); and each of the horizontal conducting wires (123) is arranged in sequence along a vertical direction.

7. The door panel assembly according to claim 6, characterized in that: In the receiving coil group (111), the distance between the projection of the center of the first receiving coil (1111) on the second side surface (132) and the first vertical conducting wire (121) is shorter than the distance between the projection of the center of the second receiving coil (1111) on the second side surface (132) and the second vertical conducting wire (122) is shorter than the distance between the projection of the center of the second receiving coil (1111) on the second side surface (132) and the first vertical conducting wire (121).

8. The door panel assembly according to claim 7, characterized in that: The distance between the projection of the first receiving coil (1111) on the second side surface (132) and the first vertical conducting wire (121) is 50-100 mm; And / or, the distance between the projection of the second receiving coil (1111) on the second side surface (132) and the second vertical conducting line (122) is 50-100 mm.

9. The door panel assembly according to claim 6, characterized in that: The distance between the projection of the center of each receiving coil (1111) on the second side surface (132) and at least one of the horizontal conducting lines (123) is less than a set threshold.

10. A through-type detection device, characterized in that: It comprises two groups of door panel assemblies (1) as described in any one of claims 1 to 9, and a detection channel (2) is provided between the two groups of door panel assemblies (1); the first side surface (131) of the door panel (13) faces the detection channel (2).

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