Card reading equipment and card reading system

Abstract

The utility model relates to the technical field of communication, in particular to card reading equipment and a card reading system. The card reading device comprises a coil coupling plate and an NFC card reader, the coil coupling plate is in electromagnetic coupling with the NFC card reader and the NFC label, the coil coupling plate is located between the NFC card reader and the NFC label, the electromagnetic coupling effect between the NFC card reader and the NFC label can be enhanced, it can be guaranteed that the relative positions of the NFC card reader and the NFC label are stable, and the optimal coupling condition is met; the enhanced magnetic field more effectively covers the NFC tag at a farther position, so that the NFC tag can receive a stronger magnetic field signal and generate a larger induced electromotive force, thereby improving the signal transmission efficiency and communication distance between the NFC card reader and the NFC tag, solving the problem that the existing NFC technology is insufficient in the aspect of remote communication, and improving the user experience. And the application range of the NFC technology can be expanded, so that the requirements of various practical application scenes can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication technical field especially, relate to a kind of card reading equipment and card reading system. BACKGROUND

[0002] In the field of near field communication technology, NFC technology as a kind of short-distance high-frequency based radio technology, its standard communication distance is usually within 10 centimeters, the original intention of this design is to ensure the security and privacy protection of data transmission, only very close equipment can exchange information, can effectively prevent unauthorized access and data theft.

[0003] However, also because of limited card reading distance, become the key factor restricting its application range, make it difficult to meet the needs of some specific industries and application scenarios.For example, NFC tag identification of large equipment on industrial automation production line, reading of goods NFC tag placed on long-distance shelf in logistics storage, etc.The objects in these application scenarios are often bulky, position dispersed or environment complex, distance far leads to serious NFC signal attenuation, cannot satisfy identification accuracy and efficiency, while limiting the further application and promotion of NFC technology.

[0004] Therefore, it is urgent to design a card reading equipment and card reading system capable of reading NFC tag at long distance. UTILITY MODEL CONTENT

[0005] Therefore, the utility model provides a kind of card reading equipment and card reading system for solving the problem of the deficiency of existing NFC technology in long-distance communication.

[0006] To solve the above technical problem, an embodiment of the utility model provides a kind of card reading equipment, the card reading equipment includes NFC card reader and coil coupling board, the NFC card reader is used to read NFC tag, the coil coupling board is electromagnetically coupled with the NFC card reader, and is used to electromagnetically coupled with NFC tag, the coil coupling board is located between the NFC card reader and the NFC tag.

[0007] As an embodiment of the utility model, the coil coupling board includes first coil assembly and dielectric structure, the first coil assembly is electromagnetically coupled with the NFC card reader, and is located in the dielectric structure.

[0008] As an embodiment of the utility model, the coil coupling board further includes second coil assembly, the dielectric structure has upper side wall and lower side wall, the first coil assembly is located in the upper side wall, and the second coil assembly is located in the lower side wall.

[0009] As an embodiment of the utility model, the first coil assembly includes an upper coil and a first capacitor, the upper coil is electromagnetically coupled with the NFC card reader, the upper coil is arranged on the upper side wall, and two legs of the first capacitor are respectively connected with two ends of the upper coil, so that the resonant frequency of the upper coil is a first preset frequency.

[0010] As an embodiment of the utility model, the second coil assembly includes a lower coil and a second capacitor, the lower coil has the same winding direction as the upper coil, the lower coil is electromagnetically coupled with the NFC card reader, the lower coil is arranged on the lower side wall, and two legs of the second capacitor are respectively connected with two ends of the lower coil, so that the resonant frequency of the lower coil is a second preset frequency.

[0011] As an embodiment of the utility model, the coil coupling plate includes a first coil assembly, and the first coil assembly is electromagnetically coupled with the NFC card reader.

[0012] As an embodiment of the utility model, the coil coupling plate further includes a second coil assembly, the second coil assembly is electromagnetically coupled with the NFC card reader, the second coil assembly corresponds to the first coil assembly in an up-down direction, and the second coil assembly has the same winding direction as the first coil assembly.

[0013] As an embodiment of the utility model, the first preset frequency is the same as the second preset frequency.

[0014] As an embodiment of the utility model, the number of turns of the upper coil and the lower coil is a preset number of turns.

[0015] The utility model provides a kind of card reading system to solve above-mentioned technical problem, the card reading system includes card reading device, and the card reading device is the card reading device described above.

[0016] Compared with prior art, the card reading device and the card reading system provided by the utility model embodiment have the following advantages:

[0017] 1. The card reading device provided by the utility model, through the coil coupling plate and the NFC card reader, NFC tag electromagnetic coupling, and when the NFC card reader reads the NFC tag, the coil coupling plate is located between the NFC card reader and the NFC tag, which not only can enhance the electromagnetic coupling effect between the NFC card reader and the NFC tag, but also can ensure the relative position stability between the three and meet the optimal coupling condition, the enhanced magnetic field can more effectively cover the NFC tag at a farther position, the coil in the NFC tag card can receive a stronger magnetic field signal, thereby generating a greater induced electromotive force, thereby improving the signal transmission efficiency and communication distance between the NFC card reader and the NFC tag, thus effectively solving the problem of insufficient long-distance communication of the existing NFC technology, and helping to expand the application range of the NFC technology, so that it can better meet the needs of various actual application scenarios.

[0018] 2. The card reading device provided by the utility model, the coil coupling plate is electromagnetically coupled with the NFC card reader through the first coil assembly and arranged in the medium structure, when the NFC card reader reads the NFC tag, the first coil assembly and the medium structure are sequentially arranged between the NFC card reader and the NFC tag, so that the medium structure can reduce the energy loss of the first coil assembly in the signal transmission process, ensure the purity and accuracy of signal transmission, and improve the performance of the card reading device.

[0019] 3. The card reading device provided by the utility model, the coil coupling plate is electromagnetically coupled with the NFC card reader through the second coil assembly, the first coil assembly and the second coil assembly are arranged on the upper side wall and the lower side wall of the medium structure respectively, and when the NFC card reader reads the NFC tag, the first coil assembly, the medium structure and the second coil assembly are sequentially arranged between the NFC card reader and the NFC tag, which can further enhance the superposition effect and strength of the magnetic field, generate a greater induced electromotive force, enhance the signal transmission between the NFC tag and the NFC card reader, and thus improve the communication efficiency and communication distance.

[0020] 4. The card reading device provided by the utility model, the first coil assembly is electromagnetically coupled with the NFC card reader through the upper coil, and the two legs of the first capacitor are connected with the two ends of the upper coil, so that the resonant frequency of the upper coil is 13.56Mhz, which is the first preset frequency, ensuring the effective communication between the NFC card reader and the NFC tag, thereby ensuring the compatibility of the card reading device with the existing NFC tag, so that the card reading device can be widely applied to various NFC application scenarios.

[0021] 5、The utility model provides a card reading equipment, second coil assembly passes through the lower layer coil and NFC card reader electromagnetic coupling, and the both ends of two legs of second electric capacity are connected with the lower layer coil respectively, can make the resonant frequency of the lower layer coil be second preset frequency 13.56Mhz, has guaranteed the effective communication between NFC card reader and NFC label, thereby guaranteeing the compatibility of card reading equipment and existing NFC label, make card reading equipment can be widely applied to various NFC application scene, in addition, the winding direction of the lower layer coil and upper layer coil is same, make the magnetic field of the lower layer coil and the magnetic field of upper layer coil mutually superimposed, thereby enhancing the superposition effect and strength of magnetic field, make the enhanced magnetic field can be more effective to cover the NFC label of far position, and the coil in the label NFC label can receive stronger magnetic field signal, and then produce greater induced electromotive force, thereby enhancing the signal transmission between NFC label and card reading module, and improve communication efficiency and communication distance. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, below will to the drawing needed to use in the embodiment or prior art description briefly introduced, obviously, the drawing in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0023] Among them:

[0024] Figure 1 It shows the communication schematic diagram in the card reading equipment provided by the embodiment one of the utility model,

[0025] Figure 2 It shows the explosion schematic diagram of coil coupling board of the card reading equipment provided by the embodiment one of the utility model,

[0026] Figure 3 It shows the first coil assembly and medium structure three-dimensional schematic diagram of the card reading equipment provided by the embodiment one of the utility model,

[0027] Figure 4 It shows the experimental test data schematic diagram of the card reading equipment provided by the embodiment one of the utility model,

[0028] Figure 5 It shows the communication schematic diagram in the card reading equipment provided by the embodiment two of the utility model,

[0029] Figure 6 It shows the first coil assembly three-dimensional schematic diagram of the card reading equipment provided by the embodiment two of the utility model,

[0030] Figure 7The utility model discloses a read card equipment of embodiment two provides the three -dimensional schematic view of second coil subassembly.

[0031] The drawing mark explanation is shown:

[0032] 1, read card equipment, 2, NFC label, 10, read card equipment

[0033] 11, coil coupling board, 12, NFC card reader,

[0034] 101, coil coupling board, 102, NFC card reader,

[0035] 111, first coil subassembly, 112, second coil subassembly, 113, medium structure,

[0036] 1011, first coil subassembly, 1012, second coil subassembly,

[0037] 1111, upper coil, 1112, first capacitor, 1121, lower coil, 1122, second capacitor,

[0038] 10111, upper coil, 10112, first capacitor, 10121, lower coil, 10122, second capacitor. DETAILED DESCRIPTION

[0039] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The drawings show embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used herein in the specification generally have only the meanings described herein and are not intended to limit the present application.

[0041] It can be understood that the singular forms "a", "an" and "the" also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "comprise / contain" or "have" and the like specify the presence of stated features, integers, steps, operations, components, parts or combinations thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, components, parts or combinations thereof.

[0042] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or a middle element can be present at the same time. The terms "vertical", "horizontal", "left", "right" and the like used herein are for illustrative purposes only. In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0043] In addition, the terms "provided", "provided with", "connected", "connected to" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] Embodiment one

[0045] Please refer to Figure 1 The first embodiment of the present application discloses a card reading device 1, which comprises an NFC card reader 12 and a coil coupling plate 11, the NFC card reader 12 is used for reading an NFC tag 2, the coil coupling plate 11 is electromagnetically coupled with the NFC card reader 12 and is used for electromagnetically coupling with the NFC tag 2, and the coil coupling plate 11 is located between the NFC card reader 12 and the NFC tag 2.

[0046] Specifically, when the NFC card reader 12 reads the NFC tag 2, a signal propagation route from the NFC card reader 12 to the NFC tag 2 is formed, and the coil coupling plate 11 is located in the path of the signal propagation route.

[0047] Specifically, the NFC card reader 12 is all card readers with NFC reading function, including but not limited to smart phones, smart computers, smart tablets, professional card readers and the like, so that the card reading device 1 can be easily integrated into the existing NFC system, reducing the upgrade cost of the system.

[0048] Specifically, the NFC tag 2 is a common tag card of NFC type, and stores corresponding information for reading.

[0049] It can be understood that the card reading device 1 is electromagnetically coupled with the NFC card reader 12 and the NFC tag 2 through the coil coupling plate 11, and when the NFC card reader 12 reads the NFC tag 2, the coil coupling plate 11 is located between the NFC card reader 12 and the NFC tag 2, which not only can enhance the electromagnetic coupling effect between the NFC card reader 12 and the NFC tag 2, but also can ensure that the relative positions among the three meet the optimal coupling conditions, and the enhanced magnetic field can more effectively cover the NFC tag at a farther position, so that the coil in the NFC tag 2 card can receive a stronger magnetic field signal, thereby generating a greater induced electromotive force, thereby improving the signal transmission efficiency and communication distance between the NFC card reader 12 and the NFC tag 2, thus effectively solving the problem of insufficient long-distance communication of the existing NFC technology, and helping to expand the application range of the NFC technology, so that it can better meet the needs of various actual application scenarios.

[0050] Specifically, the coil coupling plate 11 only needs to be placed between the NFC card reader 12 and the NFC tag 2 and electromagnetically coupled with the two, so as to realize the increase of the card reading distance, without the need for large-scale hardware modification of the existing card reading device 1, thereby greatly reducing the upgrading cost and application cost of the system, and being conducive to the wide promotion and application of the technology.

[0051] Further, as shown in Figure 1 and Figure 2 , the coil coupling plate 11 comprises a first coil assembly 111 and a dielectric structure 113, the first coil assembly 111 is electromagnetically coupled with the NFC card reader 12, and is arranged on the dielectric structure 113.

[0052] Specifically, when the NFC card reader 12 reads the NFC tag 2, the first coil assembly 111 and the dielectric structure 113 are sequentially arranged between the NFC card reader 12 and the NFC tag 2.

[0053] It can be understood that the coil coupling plate 11 electromagnetically couples the first coil assembly 111 with the NFC card reader 12 and is arranged on the dielectric structure 113, so that when the NFC card reader 12 reads the NFC tag 2, the first coil assembly 111 and the dielectric structure 113 are sequentially arranged between the NFC card reader 12 and the NFC tag 2, so that the dielectric structure 113 can reduce the energy loss of the first coil assembly 111 in the signal transmission process, ensuring the purity and accuracy of signal transmission and improving the performance of the card reading device 1.

[0054] Specifically, the medium structure 113 is made of a material with high dielectric constant and low loss characteristics, specifically tetrafluoroethylene, which has excellent dielectric properties and chemical stability, not only effectively reducing the energy loss of the first coil assembly 111 during signal transmission, but also ensuring the performance stability of the medium structure 113 during long-term use.

[0055] Further, as shown in Figure 2 and Figure 3 , the first coil assembly 111 includes an upper coil 1111 and a first capacitor 1112, the upper coil 1111 is electromagnetically coupled with the NFC reader 12, the upper coil 1111 is arranged on the upper side wall, and the two legs of the first capacitor 1112 are respectively connected with the two ends of the upper coil 1111, so that the resonance frequency of the upper coil 1111 is a first preset frequency.

[0056] Specifically, the first coil assembly 111 is electromagnetically coupled with the NFC reader 12 through the upper coil 1111, and the two legs of the first capacitor 1112 are respectively connected with the two ends of the upper coil 1111, so that the resonance frequency of the upper coil 1111 is a first preset frequency, wherein the first preset frequency is 13.56Mhz, which can ensure the effective communication between the NFC reader 12 and the NFC tag 2, thereby ensuring the compatibility of the card reading device 1 with the existing NFC tag 2, so that the card reading device 1 can be widely applied to various NFC application scenarios.

[0057] Further, as shown in Figure 2 and Figure 4 , the coil coupling plate 11 further includes a second coil assembly 112, the medium structure 113 has an upper side wall and a lower side wall, the first coil assembly 111 is arranged on the upper side wall, and the second coil assembly 112 is arranged on the lower side wall.

[0058] Specifically, when the NFC reader 12 reads the NFC tag 2, the first coil assembly 111, the medium structure 113, and the second coil assembly 112 are sequentially arranged between the NFC reader 12 and the NFC tag 2.

[0059] It can be understood that the coil coupling plate 11 is electromagnetically coupled with the NFC card reader 12 by adding the second coil assembly 112, the first coil assembly 111 and the second coil assembly 112 are arranged on the upper side wall and the lower side wall of the medium structure 113 respectively, and when the NFC card reader 12 reads the NFC tag 2, the first coil assembly 111, the medium structure 113 and the second coil assembly 112 are arranged in sequence between the NFC card reader 12 and the NFC tag 2, which can further enhance the superposition effect and strength of the magnetic field, generate a larger induced electromotive force, enhance the signal transmission between the NFC tag and the NFC card reader 12, and thus improve the communication efficiency and communication distance.

[0060] Further, the second coil assembly 112 includes a lower coil 1121 and a second capacitor 1122, the winding direction of the lower coil 1121 is the same as that of the upper coil 1111, the lower coil 1121 is electromagnetically coupled with the NFC card reader 12, the lower coil 1121 is arranged on the lower side wall, and the two legs of the second capacitor 1122 are respectively connected to the two ends of the lower coil 1121, so that the resonant frequency of the lower coil 1121 is a second preset frequency.

[0061] Further, the first preset frequency and the second preset frequency are the same.

[0062] Specifically, the first preset frequency and the second preset frequency are both 13.56Mhz, which can ensure that the card reading device 1 is compatible with existing ordinary tag cards of the NFC type, so that the card reading device 1 can be widely applied to various NFC reading application scenarios.

[0063] Specifically, the second coil assembly 112 is electromagnetically coupled with the NFC card reader 12 through the lower coil 1121, and the two legs of the second capacitor 1122 are respectively connected to the two ends of the lower coil 1121, so that the resonant frequency of the lower coil 1121 is the second preset frequency 13.56Mhz, which can ensure the effective communication between the NFC card reader 12 and the NFC tag 2, thereby ensuring the compatibility of the card reading device 1 with the existing NFC tag 2, so that the card reading device 1 can be widely applied to various NFC application scenarios.

[0064] Specifically, the winding direction of the lower coil 1121 is the same as that of the upper coil 1111, so that the magnetic field generated by the lower coil 1121 and the magnetic field generated by the upper coil 1111 are superimposed on each other, thereby enhancing the superposition effect and strength of the magnetic field, so that the enhanced magnetic field can more effectively cover the NFC tag at a farther position, and the coil in the NFC tag can receive a stronger magnetic field signal, thereby generating a larger induced electromotive force, thereby enhancing the signal transmission between the NFC tag and the card reading module, and improving the communication efficiency and communication distance.

[0065] Specifically, the coupling material used in the coil coupling plate 11 is FR4, which is a glass fiber reinforced epoxy resin plate, belongs to an insulating material, has good electrical insulation performance, can withstand high voltage, can prevent short circuit in the device, and has high mechanical strength, good dimensional stability, good heat resistance, a working temperature of 130 DEG C, and also resists chemical corrosion, and is used as a printed circuit board in the utility model to couple the first coil assembly 111, the medium structure 113 and the second coil assembly 112.

[0066] Specifically, the size of the coil coupling plate 11, the number of turns of the upper coil 1111 and the lower coil 1121, and the wire material of the coil can be adjusted according to the specific application scenario and requirements to achieve the best card reading distance and performance optimization, and can be compatible with various existing NFC card reading devices 1 and tag cards, improve the flexibility and adaptability of the card reading device 1, and reduce the application cost and promotion difficulty.

[0067] For ease of understanding, the principle of the coil coupling plate 11 for enhancing the NFC communication distance is described in detail. When the NFC card reader 12 emits a radio frequency signal, the signal will first reach the upper coil 1111 of the coil coupling plate 11, and an induced current is generated in the upper coil 1111, and the induced circuit excites a magnetic field. In addition, since the wire direction of the lower coil 1121 and the upper coil 1111 is the same, the magnetic field generated by the lower coil 1121 and the magnetic field generated by the upper coil 1111 are superimposed on each other, thereby enhancing the superposition effect and strength of the magnetic field. The enhanced magnetic field can more effectively cover the NFC tag at a farther position, so that the coil in the NFC tag can receive a stronger magnetic field signal, thereby generating a larger induced electromotive force. Therefore, the signal transmission between the NFC card reader 12 and the NFC tag is enhanced, thereby improving the communication efficiency and communication distance.

[0068] Please refer to Table 1 as shown below. Under five different conditions, the test results of the card reading distance between the NFC card reader 12 and the NFC tag when the coil coupling plate 11 is not used, and the test results of the card reading distance between the NFC card reader 12 and the NFC tag after the coil coupling plate 11 is used, confirm that the use of the coil coupling plate 11 can effectively improve the card reading distance and solve the problem of insufficient long-distance communication of the NFC technology in the prior art.

[0069] Environment T1 T2 T3 T4 T5 Without coil coupling plate 35 mm 30 mm 34 mm 8 mm 50 mm With coil coupling plate 60 mm 60 mm 60 mm 30 mm 80 mm

[0070] Table 1

[0071] Further, the number of turns of the upper coil 1111 and the lower coil 1121 is a predetermined number of turns, which is four turns in the embodiment of the utility model, but should not be limited to the utility model.

[0072] Embodiment Two

[0073] The second embodiment of the utility model discloses a card reading equipment 10, and the card reading equipment 10 disclosed in the second embodiment is basically same with the card reading equipment 1 disclosed in the first embodiment, and the same parts of the two will not be repeated here, and the main difference is that, please refer to Figure 5 As shown in the figure, the card reading equipment 10 comprises a coil coupling plate 101 and an NFC card reader 102, the coil coupling plate 101 comprises a first coil assembly 1011, and the first coil assembly 1011 is electromagnetically coupled with the NFC card reader 102.

[0074] Specifically, please refer to Figures 6-7 As shown in the figure, the first coil assembly 1011 comprises an upper layer coil 10111 and a first capacitor 10112, two legs of the first capacitor 10112 are connected with two ends of the upper layer coil 10111 respectively, so that the resonant frequency of the upper layer coil 10111 is 13.56Mhz.

[0075] Further, the coil coupling plate 101 further comprises a second coil assembly 1012, the second coil assembly 1012 is electromagnetically coupled with the NFC card reader 102, the second coil assembly 1012 corresponds to the first coil assembly 1011 upside down, and the winding direction of the second coil assembly 1012 is same with that of the first coil assembly 1011.

[0076] Specifically, the second coil assembly 1012 comprises a lower layer coil 10121 and a second capacitor 10122, the winding direction of the lower layer coil 10121 is same with that of the upper layer coil 10111, and two legs of the second capacitor 10122 are connected with two ends of the lower layer coil 10121 respectively, so that the resonant frequency of the lower layer coil 10121 is 13.56Mhz.

[0077] The card reading equipment 10 provided in the second embodiment of the utility model has the same effect as the card reading equipment 1 provided in the first embodiment, and will not be repeated here.

[0078] Embodiment Three

[0079] The third embodiment of the utility model discloses a card reading system, which is suitable for various application scenarios requiring long-distance NFC communication, including but not limited to industrial automation, logistics storage and the like, and the card reading system comprises the card reading equipment 1 in the first embodiment, and the card reading system provided in the second embodiment of the utility model has the same effect as the card reading equipment 1 provided in the first embodiment, and will not be repeated here.

[0080] Any combination of the technical features in the above embodiments can be made, and for the sake of brevity, not all possible combinations are described above, however, as long as the combination of the technical features does not exist contradictory, it should be considered within the scope of the present disclosure.

[0081] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, under the premise of not departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A card reading device, characterized by: The card reading device comprises an NFC card reader and a coil coupling board, the NFC card reader is used for reading an NFC tag, the coil coupling board is electromagnetically coupled with the NFC card reader and is used for electromagnetically coupling with the NFC tag, and the coil coupling board is located between the NFC card reader and the NFC tag.

2. The card reading device of claim 1, wherein: The coil coupling board comprises a first coil assembly and a dielectric structure, the first coil assembly is electromagnetically coupled with the NFC card reader and is arranged on the dielectric structure.

3. The card reading device of claim 2, wherein: The coil coupling board further comprises a second coil assembly, the dielectric structure has an upper sidewall and a lower sidewall, the first coil assembly is arranged on the upper sidewall, and the second coil assembly is arranged on the lower sidewall.

4. The card reading apparatus according to claim 3, characterized by: The first coil assembly comprises an upper layer coil and a first capacitor, the upper layer coil is electromagnetically coupled with the NFC card reader, the upper layer coil is arranged on the upper sidewall, and two branches of the first capacitor are respectively connected to two ends of the upper layer coil so that a resonant frequency of the upper layer coil is a first preset frequency.

5. The card reading apparatus according to claim 4, characterized by: The second coil assembly comprises a lower layer coil and a second capacitor, the lower layer coil has the same winding direction as the upper layer coil, the lower layer coil is electromagnetically coupled with the NFC card reader, the lower layer coil is arranged on the lower sidewall, and two branches of the second capacitor are respectively connected to two ends of the lower layer coil so that a resonant frequency of the lower layer coil is a second preset frequency.

6. The card reading device of claim 1, wherein: The coil coupling board comprises a first coil assembly, and the first coil assembly is electromagnetically coupled with the NFC card reader.

7. The card reading device of claim 6, wherein: The coil coupling board further comprises a second coil assembly, the second coil assembly is electromagnetically coupled with the NFC card reader, the second coil assembly corresponds to the first coil assembly in up-down direction, and the second coil assembly has the same winding direction as the first coil assembly.

8. The card reading device of claim 5, wherein: The first preset frequency is the same as the second preset frequency.

9. The card reading device of claim 5, wherein: The number of turns of the upper layer coil and the lower layer coil is a preset number of turns.

10. A card reading system characterized by comprising: The card reading system comprises the card reading device, and the card reading device is the card reading device according to any one of claims 1-9.

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