Antenna assembly, reading device and conveying system

Abstract

This application relates to an antenna assembly, a reading device, and a delivery system. The antenna assembly includes an antenna plate, which includes a first dielectric layer; a first surface and a second surface opposite each other along the thickness direction of the first dielectric layer; an antenna layer disposed within the first dielectric layer and spaced apart from the first and second surfaces; two ground layers located on the first and second surfaces, respectively; each ground layer has a through-hole penetrating the ground layer along the thickness direction of the first dielectric layer, and the orthographic projection of the antenna layer onto the plane of the first surface lies within the orthographic projection of the through-hole onto the plane of the first surface; each ground layer includes a connected grounding body and a shielding ring, the shielding ring surrounding the outer periphery of the through-hole, and the shielding rings of the two ground layers are electrically connected through the grounding hole. Therefore, the antenna assembly, reading device, and delivery system provided in this application can improve the reading success rate of the reading device.

Description

Technical Field

[0001] This application relates to the field of radio frequency identification technology, and in particular to antenna assemblies, reading devices, and delivery systems. Background Technology

[0002] Near-field communication array technology is a non-contact automatic identification technology. In principle, it is controlled by a processor unit (or microprocessor unit, hereinafter referred to as the main unit). Through a circuit built with a dedicated radio frequency chip or discrete components, it transmits and receives radio frequency signals to identify target objects (the target objects are generally dedicated or general-purpose near-field communication array tags, hereinafter referred to as tags) and obtain relevant data. After the tag enters the magnetic field emitted by the reader, it receives the radio frequency signal emitted by the reader and transmits the product information stored in the chip by using the energy obtained by the induced current.

[0003] In related technologies, the conveying system may include a reading device that can identify tags on the moving parts. However, the reading success rate of the aforementioned reading devices is low. Utility Model Content

[0004] Therefore, it is necessary to provide an antenna assembly, a reading device, and a delivery system that can improve the reading success rate of the reading device.

[0005] In a first aspect, embodiments of this application provide an antenna assembly, which includes an antenna board, the antenna board comprising:

[0006] A first dielectric layer; comprising a first surface and a second surface opposite to each other along the thickness direction of the first dielectric layer;

[0007] The antenna layer is disposed within the first dielectric layer and is spaced apart from the first surface and the second surface, respectively.

[0008] Two grounding layers are located on the first surface and the second surface, respectively. The grounding layers are provided with through holes that penetrate the grounding layers along the thickness direction of the first dielectric layer. The orthographic projection of the antenna layer on the plane where the first surface is located is located within the orthographic projection of the through holes on the plane where the first surface is located.

[0009] The grounding layer includes a connected grounding body and a shielding ring. The shielding ring surrounds the outer periphery of the through hole, and the grounding body is located on the side of the shielding ring away from the through hole. The antenna assembly includes a group of grounding holes located on the outer periphery of the through hole. The group of grounding holes includes multiple grounding holes arranged at intervals along the circumference of the through hole. The grounding holes penetrate the first dielectric layer, and the shielding rings of the two grounding layers are electrically connected through the grounding holes.

[0010] The antenna assembly provided in this application embodiment has an antenna layer that is well wrapped by a first dielectric layer and not exposed outside the first dielectric layer. This makes the antenna layer less susceptible to physical interference from the driving magnetic track, so as to adapt to vibration, dust, and liquid splash conditions. In addition, the antenna layer is not directly exposed to interference such as low-frequency magnetic field of the driving magnetic track, high-frequency harmonics of the motor, and inverter noise, which can improve the magnetic field coupling stability of the antenna board, thereby improving the reading success rate of the antenna assembly and the reading device.

[0011] In one embodiment, the distance between the orthographic projection of the antenna layer on the plane of the first surface and the orthographic projection of the via on the plane of the first surface is in the range of 0.5mm-2mm.

[0012] In one embodiment, in a group of grounding holes, the distance between two adjacent grounding holes is less than or equal to 3 mm; and / or,

[0013] The diameter of the grounding hole ranges from 0.2mm to 0.4mm.

[0014] In one embodiment, the antenna assembly includes a control board and an interference circuit, the interference circuit being disposed on the control board, and the antenna board and the control board being electrically connected via a radio frequency coaxial cable.

[0015] In one embodiment, there are multiple grounding hole groups, which are arranged at intervals along a direction away from the through hole.

[0016] In the same grounding hole group, the distance between two adjacent grounding holes is the first distance; the two adjacent grounding hole groups are defined as the first grounding hole group and the second grounding hole group, the first grounding hole group is located on the side of the second grounding hole group facing the through hole, the first distance of the first grounding hole group is less than the first distance of the second grounding hole group, and the diameter of the grounding hole in the first grounding hole group is greater than the diameter of the grounding hole in the second grounding hole group.

[0017] In one embodiment, the antenna assembly includes a first mounting member and a second mounting member, the first mounting member being connected to an antenna plate and the second mounting member being used to connect to a trajectory conveying device.

[0018] The second mounting component is provided with a sliding groove, and part of the first mounting component is inserted into the sliding groove and is movable along the extension direction of the sliding groove.

[0019] In one embodiment, the chute includes a first chute and a second chute that are connected, the second chute being located on the side of the first chute facing the chute opening, and the first mounting member includes a first insertion part and a second insertion part, the first insertion part being located in the first chute, one end of the second insertion part being located in the second chute, and the other end of the second insertion part being connected to the antenna board.

[0020] Along the groove depth direction perpendicular to the slide, the size of the first insertion part is larger than the size of the second insertion part, the opening size of the first groove is larger than the opening size of the second groove, the second mounting member at the second groove protrudes from the groove sidewall of the first groove and is configured as a limiting part, and the first insertion part is located between the groove bottom wall of the slide and the limiting part.

[0021] In one embodiment, the chute includes a first sub-chute extending along a first direction; the first direction is perpendicular to the chute depth direction.

[0022] The second mounting component has a disassembly groove on the side facing the slide groove. The disassembly groove is located on at least one side of the first sub-slide groove along a first direction and communicates with the first sub-slide groove. Along the groove depth direction perpendicular to the slide groove, the size of the first insertion portion is smaller than the opening size of the disassembly groove; and / or,

[0023] The chute includes at least one second sub-chute and at least one third sub-chute, which are correspondingly arranged. In the corresponding second and third sub-chutes, the third sub-chute is located on one side of the second sub-chute along a first direction and is connected to the second sub-chute. The second sub-chute extends along a second direction and is located on one side of the first sub-chute along the second direction. One end of the second sub-chute along the second direction is connected to the first sub-chute. A flexible buffer is provided on the wall of the third sub-chute. When the first and second mounting members are in a limited position, a third sub-chute is constructed as a limited sub-chute. Part of the first mounting member is located in the limited sub-chute. The shape of the first mounting member in the limited sub-chute is adapted to the shape of the limited sub-chute. The flexible buffer in the limited sub-chute is in a compressed state. The second direction is perpendicular to the chute depth direction and intersects with the first direction.

[0024] Secondly, embodiments of this application provide a reading device, including the antenna assembly of the first aspect.

[0025] Thirdly, embodiments of this application provide a conveying system, including a trajectory conveying device and a reading device in the second aspect, wherein at least a portion of the reading device is installed on the trajectory conveying device, and the trajectory conveying device is used to support the trajectory movement of the object to be measured. Attached Figure Description

[0026] Figure 1 This is a side view of the antenna board provided in an embodiment of this application.

[0027] Figure 2 This is a cross-sectional view of the antenna board provided in an embodiment of this application.

[0028] Figure 3 A cross-sectional view of the first and second mounting components provided in the embodiments of this application.

[0029] Figure 4A side view of the second mounting component provided in an embodiment of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. Antenna board; 111. First dielectric layer; 1111. First surface; 1112. Second surface; 112. Encapsulation layer; 120. Antenna layer; 130. Grounding layer; 131. Through hole; 132. Grounding body; 133. Shielding ring; 140. Grounding hole group; 141. Grounding hole; 150. IPEX interface; 210. First mounting component; 211. First insertion part; 212. Second insertion part; 220. Second mounting component; 221. Slide; 2211. First slot; 2212. Second slot; 2221. First sub-slide; 2222. Second sub-slide; 2223. Third sub-slide; 223. Disassembly / assembly slot; 2241. First slot sidewall; 225. Limiting part; 230. Blocking component; A. First direction; B. Second direction; C. Third direction. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0038] In related technologies, the delivery system may include a reading device capable of identifying tags on the vehicle. The reading device includes an antenna board, which comprises a circuit board and an antenna layer disposed on the surface of the circuit board.

[0039] However, the antenna layer is located on the surface of the circuit board, making it susceptible to physical interference from the drive magnetic track. In addition, the antenna layer is directly exposed to interference from the low-frequency magnetic field of the drive magnetic track, high-frequency harmonics of the motor, and inverter noise, which leads to a decrease in the magnetic field coupling stability of the antenna board, resulting in a low reading success rate of the reading device.

[0040] To address the aforementioned issues, embodiments of this application provide an antenna assembly, a reading device, and a delivery system, which can improve the reading success rate of the antenna assembly and the reading device.

[0041] The following will combine Figures 1-4The antenna assembly, reading device, and delivery system provided in the embodiments of this application will be described.

[0042] See Figure 2 This application provides an antenna assembly, which includes an antenna plate 100. The antenna plate 100 includes a first dielectric layer 111, which includes a first surface 1111 and a second surface 1112 opposite to each other along the thickness direction of the first dielectric layer 111. An antenna layer 120 is disposed within the first dielectric layer 111, and the antenna layer 120 is spaced apart from the first surface 1111 and the second surface 1112. In this way, the antenna layer 120 is well enclosed by the first dielectric layer 111 and is not exposed outside the first dielectric layer 111, making the antenna layer 120 less susceptible to physical interference from the drive magnetic track, so as to adapt to vibration, dust, and liquid splash conditions. In addition, the antenna layer 120 is not directly exposed to interference such as low-frequency magnetic field of the drive magnetic track, high-frequency harmonics of the motor, and inverter noise, which can improve the magnetic field coupling stability of the antenna plate 100, thereby improving the reading success rate of the antenna assembly and the reading device.

[0043] For example, antenna layer 120 can be a multi-turn spiral structure.

[0044] For example, the antenna layer 120 can be a rectangular or racetrack-shaped multi-turn spiral structure to ensure that the magnetic field coverage area of ​​the antenna layer 120 matches the motion path of the object under test. When the antenna plate 100 is mounted on the side of the trajectory conveying device (e.g., a drive magnetic track), the magnetic field coupling area can be increased.

[0045] For example, by optimizing the number of turns and linewidth of the spiral structure of antenna layer 120, the magnetic field strength and space occupation can be balanced, ensuring the magnetic field stability at the 13.56MHz operating frequency, while avoiding the antenna layer 120 being too large and breaking the space constraints of the transmission line, and ensuring that the read / write distance can cover the normal distance between the object under test and the reading node.

[0046] For example, the inductance of antenna layer 120 is 1μH-3μH.

[0047] For example, the antenna layer 120 has a spiral structure with 2 turns, a linewidth of 0.3 mm, an outer diameter of 14.8 mm, and an inductance of 1.47 μH.

[0048] For example, the two ends of the antenna layer 120 are electrically connected to the matching circuit.

[0049] See Figure 1 and Figure 2The antenna board 100 includes two grounding layers 130, which are located on the first surface 1111 and the second surface 1112, respectively. The grounding layer 130 is provided with a through hole 131, which penetrates the grounding layer 130 along the thickness direction (i.e., direction D) of the first dielectric layer 111. The orthographic projection of the antenna layer 120 on the plane where the first surface 1111 is located is within the orthographic projection of the through hole 131 on the plane where the first surface 1111 is located. In this way, by providing grounding layers 130 on both sides of the antenna layer 120, the coupling of the low-frequency strong magnetic field of the driving magnetic track to the antenna layer 120 can be weakened, which is beneficial to improving the reading success rate of the reading device.

[0050] The grounding layer 130 is arranged around the periphery of the through-hole 131, which can shield against external interference sources. The through-hole 131 can avoid magnetic field cancellation caused by a complete ground plane, ensuring that the 13.56MHz useful magnetic field can effectively penetrate. The overall thickness of the two grounding layers 130 and the antenna layer 120 is compressed to a small size, which can meet the compact installation requirements of the drive magnetic rail and the reading device. At the same time, by partially wrapping the antenna layer 120 with the two grounding layers 130, a basic shielding frame is formed, reducing external physical interference and electromagnetic interference directly acting on the antenna layer 120.

[0051] See Figure 1 and Figure 2 The grounding layer 130 includes a grounding body 132 and a shielding ring 133 connected together. The shielding ring 133 surrounds the outer periphery of the through hole 131, and the grounding body 132 is arranged around the shielding ring 133 on the side away from the through hole 131. The antenna assembly includes a grounding hole group 140 (i.e., a ring of grounding holes) located on the outer periphery of the through hole 131. The grounding hole group 140 includes a plurality of grounding holes 141 arranged at intervals along the circumference of the through hole 131. The grounding holes 141 penetrate the first dielectric layer 111. The shielding rings 133 of the two grounding layers 130 are electrically connected through the grounding holes 141. In this way, by setting the shielding ring 133 and the grounding holes 141, the high-frequency harmonics of the motor, the frequency converter noise and the electromagnetic noise of the drive magnetic track can be suppressed. A low-impedance discharge path for the coupled induced current of the drive magnetic track can also be established, which can avoid the antenna performance attenuation caused by the induced current and further suppress the coupling of the external interference source to the antenna layer 120.

[0052] For example, the shape of the via 131 is consistent with the outline of the antenna layer 120.

[0053] See Figure 2In some embodiments, the antenna board 100 may include an encapsulation layer 112, which may be located at least on the side of the ground layer 130 away from the antenna layer 120. Thus, by providing the encapsulation layer 112, it is beneficial to improve the mechanical strength and dustproof and waterproof performance of the antenna board 100, and to resist mechanical vibration, dust accumulation, and liquid splashes in some scenarios (such as food washing and car painting), thereby reducing the risk of the antenna board 100 failing due to environmental factors.

[0054] For example, the distance between the orthographic projection of the antenna layer 120 on the plane containing the first surface 1111 and the orthographic projection of the via 131 on the plane containing the first surface 1111 is in the range of 0.5mm-2mm. This can avoid magnetic field distortion caused by edge effects. For example, this distance can be 0.5mm, 1mm, 1.2mm, 1.5mm, 2mm or any value between 0.5mm and 2mm.

[0055] For example, in the grounding hole group 140, the distance between two adjacent grounding holes 141 is less than or equal to 5 mm. For example, the distance can be any value of 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm or less than 5 mm.

[0056] For example, the diameter of the grounding hole 141 is in the range of 0.2mm-0.4mm. For instance, the diameter can be 0.2mm, 0.3mm, 0.4mm or any value between 0.2mm and 0.4mm.

[0057] For example, the number of grounding holes 141 in the grounding hole group 140 can be any number of 8, 12, 20 or more than 2.

[0058] For example, the grounding holes 141 of the grounding hole group 140 are evenly arranged.

[0059] For example, the width of the shielding ring 133 is 1 mm.

[0060] For example, the material of the grounding layer 130 may include copper or other metallic materials.

[0061] In some embodiments, the antenna assembly includes a control board and an interference circuit. The interference circuit is disposed on the control board, and the antenna board 100 and the control board are electrically connected by a radio frequency coaxial cable. In this way, the control board and the antenna board 100 are set up separately and independently, achieving effective physical isolation between the interference circuit and the antenna board 100, so that the interference circuit located on the control board has less interference to the antenna board 100.

[0062] For example, the antenna board 100 is provided with an IPEX interface 150, and the radio frequency coaxial cable is connected to the IPEX interface 150.

[0063] For example, the RF coaxial cable is 80mm long and uses a double-shielded structure (inner aluminum foil, outer braided mesh) to further enhance anti-interference capabilities.

[0064] In some embodiments, the interference circuitry on the control board includes power supply circuitry (DC-DC converter, LDO regulator), crystal oscillators (especially 13.56MHz frequency doubling crystal oscillators, such as 27.12MHz), high-speed digital signal lines (clock lines and data lines with a transmission rate ≥100MHz), etc.

[0065] For example, a copper foil shield (3mm high) is provided around the DC-DC converter on the control board, and the shield is connected to the ground plane.

[0066] In some embodiments, the edge of the antenna board 100 can be provided with a simple positioning and mounting structure and a buffer structure. The positioning and mounting structure can ensure that the antenna board 100 is installed quickly and accurately, avoiding installation deviations that could affect the coupling effect. The buffer structure (such as a silicone pad) absorbs vibrations during the operation of the drive magnetic track, reducing antenna solder joint detachment and module damage caused by vibration, and improving long-term operational reliability.

[0067] For example, the grounding layer of the first surface 1111 can be a first grounding layer. The grounding layer of the second surface 1112 can be a second grounding layer. The thickness of the first grounding layer is 0.3 mm, the thickness of the second grounding layer is 0.2 mm, and the thickness of the antenna layer 120 is 0.2 mm. A membrane layer for mounting the IPEX interface and matching circuit is provided on the side of the second grounding layer 130 opposite to the antenna layer 120. The pins of the IPEX interface are connected to the feed point of the antenna layer 120, and the base shield of the IPEX interface is soldered to the adjacent second grounding layer.

[0068] In some embodiments, there are multiple grounding hole groups 140, which are arranged at intervals along the direction away from the through hole 131. In this way, by setting multiple grounding hole groups 140, the coupling of external interference sources to the antenna layer 120 can be better suppressed.

[0069] In some embodiments, within the same grounding hole group 140, the distance between two adjacent grounding holes 141 is defined as a first distance. Two adjacent grounding hole groups 140 are defined as a first grounding hole group and a second grounding hole group, respectively. The first grounding hole group is located on the side of the second grounding hole group facing the through-hole 131. The first distance between the first grounding hole groups is less than the first distance between the second grounding hole groups, and the aperture of the grounding hole 141 in the first grounding hole group is larger than the aperture of the grounding hole 141 in the second grounding hole group. Thus, setting a smaller first distance for the first grounding hole group, which is closer to the antenna layer 120, and setting a larger aperture for the grounding hole 141, is beneficial for improving the resistance of multiple grounding hole groups 140 to external interference. Furthermore, setting a smaller first distance for the second grounding hole group, which is farther from the antenna layer 120, and setting a smaller aperture for the grounding hole 141, is beneficial for reducing the area occupied by the second grounding hole group.

[0070] See Figure 3 In some embodiments, the antenna assembly includes a positioning and mounting structure, which includes a first mounting member 210 and a second mounting member 220. The first mounting member 210 is connected to the antenna plate 100, and the second mounting member 220 is used to connect to the trajectory conveying device. The first mounting member 210 and the second mounting member 220 are detachably connected. Thus, by setting the first mounting member 210 and the second mounting member 220, the antenna plate 100 and the trajectory conveying device can be quickly installed and removed.

[0071] See Figure 3 In some embodiments, the second mounting member 220 is provided with a slide groove 221, and a portion of the first mounting member 210 is inserted into the slide groove 221. The first mounting member 210 is movably configured along the extension direction of the slide groove 221. Thus, by sliding the first mounting member 210 in the slide groove 221, the position of the first mounting member 210 in the slide groove 221 can be adjusted to adjust the position of the antenna plate 100 relative to the trajectory conveying device, so that the antenna plate 100 can be applied to more scenarios.

[0072] See Figure 3In some embodiments, the slide 221 includes a first groove 2211 and a second groove 2212 that are connected. The second groove 2212 is located on the side of the first groove 2211 facing the opening of the slide 221. The first mounting member 210 includes a first insertion part 211 and a second insertion part 212. The first insertion part 211 is located in the first groove 2211. One end of the second insertion part 212 is located in the second groove 2212. The other end of the second insertion part 212 is connected to the antenna board 100. The other end of the second insertion part 212 is located outside the slide 221. Along the groove depth direction perpendicular to the slide 221, the size of the first insertion part 211 is larger than the size of the second insertion part 212. The opening size of the first groove 2211 is larger than the opening size of the second groove 2212. The second mounting member 220 at the second groove 2212 protrudes from the groove sidewall of the first groove 2211 and is configured as a limiting part 225. The first insertion part 211 is located between the bottom wall of the slide groove 221 and the limiting part 225. In this way, the opening size of the second groove 2212 is smaller. During the sliding of the first mounting member 210 in the slide groove 221, the limiting part 225 blocks the first insertion part 211, preventing the first insertion part 211 from exiting the slide groove 221 through the second groove 2212. The limiting part 225 and the bottom wall of the slide groove 221 can limit the first mounting member 210 along the groove depth direction of the slide groove 221, which can prevent the first mounting member 210 from accidentally coming out of the slide groove 221 along the groove depth direction (i.e., the third direction C).

[0073] See Figure 4 In some embodiments, the chute 221 includes a first sub-chute 2221, which extends along a first direction A. The first direction A is perpendicular to the groove depth direction (i.e., direction C) of the chute 221. Thus, by setting the first sub-chute 2221, the first mounting member 210 can move within the first sub-chute 2221 along the first direction A to adjust the position of the first mounting member 210 in the first direction A, thereby adjusting the position of the antenna plate 100 relative to the trajectory conveying device in the first direction A.

[0074] See Figure 4 In some embodiments, the second mounting member 220 has a disassembly groove 223 on the side facing the slide groove 221. The disassembly groove 223 is located on at least one side of the first sub-slide groove 2221 along the first direction A, and the disassembly groove 223 communicates with the first sub-slide groove 2221. Along the groove depth direction perpendicular to the slide groove 221, the size of the first insertion part 211 is smaller than the opening size of the disassembly groove 223. Thus, both the first insertion part 211 and the second insertion part 212 can freely enter and exit the disassembly groove 223 along the direction C. When assembling the first mounting member 210 and the second mounting member 220, the first insertion part 211 and the second insertion part 212 can be inserted into the disassembly groove 223 first, and then the first insertion part 211 and the second insertion part 212 can be driven into the slide groove 221 along the first direction.

[0075] See Figure 4 In some embodiments, the slide 221 includes at least one second sub-slide 2222 and at least one third sub-slide 2223, with the second sub-slide 2222 and the third sub-slide 2223 correspondingly disposed; in the corresponding second sub-slide 2222 and third sub-slide 2223, the third sub-slide 2223 is located on one side of the second sub-slide 2222 along the first direction A, and the third sub-slide 2223 communicates with the second sub-slide 2222; the second sub-slide 2222 extends along the second direction B, and the second sub-slide 2222 is located on one side of the first sub-slide 2221 along the second direction B, the second sub-slide 2222... One end of groove 2222 along the second direction B communicates with the first sub-slide groove 2221. Thus, when assembling the first mounting component 210 and the second mounting component 220, the first mounting component 210 first enters the disassembly groove 223, then enters the first sub-slide groove 2221 along the first direction and moves within it. Next, it enters the second sub-slide groove 2222 along the second direction and moves within it along the second direction B. Finally, it enters the third sub-slide groove 2223 along the first direction, thus defining the limiting state of the first mounting component 210 and the second mounting component 220. When the first mounting component 210 and the second mounting component 220 are in the limiting state, the first mounting component 210 is fixed to the second mounting component 220.

[0076] In some embodiments, a flexible buffer is provided on the groove wall of the third sub-slide 2223. When the first mounting member 210 and the second mounting member 220 are in the limiting state, a third sub-slide 2223 is constructed as a limiting sub-slide, and part of the first mounting member 210 is located in the limiting sub-slide. The shape of the first mounting member 210 located in the limiting sub-slide is adapted to the shape of the limiting sub-slide. The flexible buffer in the limiting sub-slide is in a compressed state. In this way, the flexible buffer in the limiting sub-slide prevents the first mounting member 210 from shaking in the limiting sub-slide and can play a pre-fixing role for the first mounting member 210. In addition, it can also play a buffering role to prevent vibration from damaging the antenna plate 100.

[0077] For example, the second direction B is perpendicular to the groove depth direction C, and the first direction A and the second direction B intersect, for example, the first direction A and the second direction B are perpendicular.

[0078] In some embodiments, the third sub-slide 2223 includes a first slot sidewall 2241 facing away from the corresponding second sub-slide 2222. The antenna assembly includes a blocking member 230, which is detachably connected to the second mounting member 220 via screws. The blocking member 230 is mounted on the side of the second mounting member 220 facing the slide 221. When the first mounting member 210 and the second mounting member 220 are in a limited position, the first mounting member 210 is located between the first slot sidewall 2241 of the limiting sub-slide and the blocking member 230. The first slot sidewall 2241 and the blocking member 230 of the limiting sub-slide can limit the first mounting member 210 along a first direction. The two opposite slot sidewalls of the limiting sub-slide along a second direction can limit the first mounting member 210 along the second direction, thereby fixing the first mounting member 210 in the limiting sub-slide to fix the first mounting member to the second mounting member.

[0079] For example, the antenna assembly is suitable for an operating frequency of 13.56 MHz.

[0080] In some embodiments, the antenna assembly is suitable for smart cards, IoT terminals, industrial control equipment (track conveying devices), medical fields, aerospace fields, smart agriculture fields, etc.

[0081] For example, in a hospital's drug management system, by installing RFID tags on drug storage shelves and medicine boxes, and using reading devices, information such as the inventory quantity, location, and expiration date of drugs can be tracked quickly and accurately. At the same time, their excellent dustproof and waterproof performance ensures stable operation in the complex environment of a hospital (such as cleaning and disinfection, and humidity control of drug storage), avoiding reading errors caused by environmental factors and ensuring the accuracy and safety of drug management.

[0082] For example, in the maintenance and management of aircraft components, antenna assemblies can be used to track component information of critical parts such as aircraft engines and wings. Due to the extremely high requirements for equipment reliability and stability in the aerospace environment, the dustproof and waterproof design of the antenna panel, along with its precise positioning function, ensures accurate reading and management of component information under complex conditions such as extreme temperature and pressure changes and strong electromagnetic interference at high altitudes, providing strong support for safe aircraft flight.

[0083] For example, in greenhouse crop management, by installing RFID tags on planting racks and irrigation equipment, reading devices can monitor crop growth environment parameters (such as temperature, humidity, and light) in real time, and achieve precise irrigation and fertilization control based on the tag information. Its waterproof and dustproof performance adapts to the high humidity and potential dust environment inside greenhouses, ensuring long-term stable operation of the system and contributing to the intelligent and efficient development of agricultural production.

[0084] For example, the reading device can be combined with 5G technology. Leveraging 5G's high-speed data transmission and low latency, rapid, real-time transmission of RFID data can be achieved, providing more efficient support for remote monitoring and management. For instance, in a smart factory, production data collected by the RFID reading device can be transmitted in real-time to a cloud server via a 5G network. Managers can then view production progress, equipment status, and other information anytime, anywhere via mobile phone or computer, enabling remote production scheduling and quality control.

[0085] For example, the reading device can be fused with other types of sensors, such as temperature sensors, pressure sensors, and humidity sensors. In cold chain logistics, for instance, integrating RFID tags with temperature sensors onto cargo packaging allows the reading device to not only track the cargo's location in real time but also acquire its temperature information. When the temperature exceeds a preset range, the system can promptly issue an alarm, alerting staff to take appropriate measures to ensure the quality and safety of the goods. This multi-sensor fusion approach provides users with more comprehensive and accurate information.

[0086] For example, when the antenna board 100 is subjected to anti-interference testing, and the DC-DC converter on the control board is working (output current 260mA) and SPI signal is being transmitted, the read / write success rate of the antenna board 100 is ≥99.5%. In the read / write performance test of the antenna board 100, under interference-free conditions, the maximum read / write distance between the antenna board 100 and a standard 13.56MHz RFID tag is 38mm, meeting the application requirements of smart card readers.

[0087] The following describes the reading device provided in the embodiments of this application.

[0088] This application provides a reading device, which includes the antenna assembly described in the above embodiments. The reading device can be a near-field communication array reading device, which is mounted on a trajectory conveying device. The trajectory conveying device supports the movement of the object under test along a preset track. The near-field communication array (NFC) refers to a communication system built using near-field communication technology, used for wireless communication and data transmission over a short range. It is typically used for data transmission between mobile devices or between a mobile device and a reader, and can include RFID (Radio-Frequency Identification), NFC (Near Field Communication), etc. This embodiment uses RFID as an example for explanation; other specific implementations of NFC arrays are the same as this embodiment and will not be elaborated upon here.

[0089] In some embodiments, the reading device may include a tag unit and a sensing module. The tag unit is fixed to the object under test and is used to transmit tag signals associated with the location information of the object under test based on a preset program. The preset program may refer to a transmission control program built into the tag unit, through which signal content can be edited, signal frequency set, transmission interval set, etc. The sensing module is fixed to the trajectory conveying device and is used to receive tag signals within the sensing range. The sensing module may include an antenna assembly.

[0090] The following describes the conveying system provided in the embodiments of this application.

[0091] This application provides a conveying system, which includes a trajectory conveying device and a reading device. The reading device is at least partially installed on the trajectory conveying device, which is used to support the trajectory movement of the object to be measured.

[0092] In some embodiments, the antenna plate 100 may be mounted on the side of the trajectory conveying device.

[0093] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0094] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An antenna assembly, characterized in that, The antenna assembly includes an antenna board, the antenna board comprising: A first dielectric layer; comprising a first surface and a second surface opposite to each other along the thickness direction of the first dielectric layer; An antenna layer is disposed within the first dielectric layer and is spaced apart from the first surface and the second surface, respectively. Two grounding layers are located on the first surface and the second surface, respectively; the grounding layer is provided with a through hole, which penetrates the grounding layer along the thickness direction of the first dielectric layer; the orthographic projection of the antenna layer on the plane where the first surface is located is located within the orthographic projection of the through hole on the plane where the first surface is located. The grounding layer includes a connected grounding body and a shielding ring. The shielding ring surrounds the outer periphery of the through hole, and the grounding body is located on the side of the shielding ring away from the through hole. The antenna assembly includes a group of grounding holes located on the outer periphery of the through hole. The group of grounding holes includes a plurality of grounding holes arranged at intervals along the circumference of the through hole. The grounding holes penetrate the first dielectric layer, and the shielding rings of the two grounding layers are electrically connected through the grounding holes.

2. The antenna assembly according to claim 1, characterized in that, The distance between the orthographic projection of the antenna layer on the plane containing the first surface and the orthographic projection of the through hole on the plane containing the first surface is in the range of 0.5mm-2mm.

3. The antenna assembly according to claim 1, characterized in that, In the grounding hole group, the distance between two adjacent grounding holes is less than or equal to 3 mm; and / or, The diameter of the grounding hole ranges from 0.2mm to 0.4mm.

4. The antenna assembly according to any one of claims 1-3, characterized in that, The antenna assembly includes a control board and an interference circuit. The interference circuit is disposed on the control board, and the antenna board and the control board are electrically connected via a radio frequency coaxial cable.

5. The antenna assembly according to any one of claims 1-3, characterized in that, The number of grounding hole groups is multiple, and the multiple grounding hole groups are arranged at intervals along a direction away from the through hole; In the same grounding hole group, the distance between two adjacent grounding holes is a first distance; the two adjacent grounding hole groups are defined as a first grounding hole group and a second grounding hole group, the first grounding hole group is located on the side of the second grounding hole group facing the through hole, the first distance of the first grounding hole group is less than the first distance of the second grounding hole group, and the diameter of the grounding hole in the first grounding hole group is greater than the diameter of the grounding hole in the second grounding hole group.

6. The antenna assembly according to any one of claims 1-3, characterized in that, The antenna assembly includes a first mounting component and a second mounting component, the first mounting component being connected to the antenna plate, and the second mounting component being used to connect to the trajectory conveying device. The second mounting component is provided with a groove, and a portion of the first mounting component is inserted into the groove and is movable along the extension direction of the groove.

7. The antenna assembly according to claim 6, characterized in that, The chute includes a first chute and a second chute that are connected. The second chute is located on the side of the first chute facing the chute opening. The first mounting component includes a first insertion part and a second insertion part. The first insertion part is located in the first chute. One end of the second insertion part is located in the second chute. The other end of the second insertion part is connected to the antenna board. Along the groove depth direction perpendicular to the slide, the size of the first insertion part is larger than the size of the second insertion part, the opening size of the first groove is larger than the opening size of the second groove, the second mounting member at the second groove protrudes from the groove sidewall of the first groove and is configured as a limiting part, and the first insertion part is located between the groove bottom wall of the slide and the limiting part.

8. The antenna assembly according to claim 7, characterized in that, The chute includes a first sub-chute, which extends along a first direction; the first direction is perpendicular to the chute depth direction. The second mounting component has a disassembly groove on the side facing the slide groove. This disassembly groove is located on at least one side of the first sub-slide groove along the first direction and communicates with the first sub-slide groove. Along the groove depth direction perpendicular to the slide groove, the size of the first insertion portion is smaller than the opening size of the disassembly groove; and / or, The chute includes at least one second sub-chute and at least one third sub-chute, with the second and third sub-chutes correspondingly arranged. In the corresponding second and third sub-chutes, the third sub-chute is located on one side of the second sub-chute along the first direction and communicates with it. The second sub-chute extends along a second direction and is located on one side of the first sub-chute along the second direction, with one end of the second sub-chute communicating with the first sub-chute along the second direction. A flexible buffer is provided on the wall of the third sub-chute. When the first and second mounting members are in a limited position, one of the third sub-chutes is configured as a limited sub-chute, with a portion of the first mounting member located within the limited sub-chute. The shape of the first mounting member within the limited sub-chute matches the shape of the limited sub-chute, and the flexible buffer within the limited sub-chute is in a compressed state. The second direction is perpendicular to the chute depth direction and intersects with the first direction.

9. A reading device, characterized in that, Includes the antenna assembly described in any one of claims 1-8.

10. A conveying system, characterized in that, The device includes a trajectory conveying device and a reading device as described in claim 9, wherein at least a portion of the reading device is mounted on the trajectory conveying device, and the trajectory conveying device is used to support the trajectory movement of the object under test.

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