RFID card reader

Abstract

The present application relates to a radio frequency card reader comprising a base and a movable body. The movable body includes an radio frequency card reader chip and an antenna switching assembly, wherein the radio frequency card reader chip has at least one first antenna interface; the base includes an antenna matching network assembly and at least one second antenna interface, wherein the antenna matching network assembly is coupled to the at least one second antenna interface. Embodiments of the present application enable the radio frequency card reader's operating mode to be flexibly switched according to usage requirements.

Description

Technical Field

[0001] The present application relates to the field of radio frequency identification technology, and in particular to a radio frequency card reader. Background Art

[0002] Radio Frequency Identification (RFID) technology is widely used in industrial and commercial environments for purposes such as object identification and tracking. RFID systems can generally be categorized into two types: active and passive. For example, a passive RFID system typically consists of at least one RFID reader, a reader antenna, a server that communicates with the RFID reader, and a large number of passive RFID tags attached to the items being tracked.

[0003] In RFID systems, RFID readers (referred to as "readers") play a crucial role. They use their antenna to acquire information from RFID tags within their specified range. Furthermore, they communicate with servers, outputting the information they read and receiving instructions from them. This allows for target identification, data transmission, and process control.

[0004] Currently, two broad types of card readers are available for different application scenarios or purposes: fixed card readers and portable card readers. Fixed card readers are larger in size and therefore often used in fixed locations. They typically feature multiple antenna interfaces and a wide effective read range, making them suitable for multi-tag, wide-area item identification and tracking. In contrast, portable card readers are smaller in size and often utilize a single, less efficient reader antenna. They have a narrow effective read range and are typically held by an operator close to the tag to read information. They are therefore suitable for close-range reading, writing, and tracking of single tags.

[0005] Currently, in actual applications, with the evolution of next-generation wireless communication technology, the types and number of user-related application scenarios have increased significantly, which has put higher requirements on the performance of RFID products. Old RFID products can no longer meet actual usage needs. Summary of the Invention

[0006] In view of this, embodiments of the present application provide a radio frequency card reader and a radio frequency identification method, which can meet the radio frequency identification requirements of various application scenarios.

[0007] The embodiment of the present application provides a radio frequency card reader, which includes a base and a movable body, wherein:

[0008] The movable body includes a radio frequency reader chip and an antenna switching component, wherein the radio frequency reader chip has at least one first antenna interface; the base includes an antenna matching network component and at least one second antenna interface, and the antenna matching network component is coupled to the at least one second antenna interface; wherein the antenna switching component is used to: when the movable body is separated from the base, use the at least one first antenna interface on the radio frequency reader chip as the working antenna interface of the radio frequency reader; and when the movable body is combined with the base, use the at least one second antenna interface coupled to the antenna matching network component as the working antenna interface of the radio frequency reader.

[0009] In an embodiment of the present application, the first antenna interface is used to connect a first type of antenna; and the second antenna interface is used to connect a second type of antenna.

[0010] In an embodiment of the present application, the radio frequency card reader chip has a first antenna interface; when the movable body is separated from the base, the antenna switching component is used to connect the first antenna interface on the radio frequency card reader chip to the preconfigured first type antenna; when the movable body is combined with the base, the antenna switching component is used to connect the first antenna interface on the radio frequency card reader chip to the antenna matching network component.

[0011] In an embodiment of the present application, the radio frequency card reader chip has multiple first antenna interfaces, and the multiple first antenna interfaces are coupled to a multi-way switching component, and the multi-way switching component is used to select one first antenna interface from the multiple first antenna interfaces; when the movable body is separated from the base, the antenna switching component is used to connect the multi-way switching component with the preconfigured first type antenna; and when the movable body is combined with the base, the antenna switching component is used to connect the multi-way switching component with the antenna matching network component.

[0012] In an embodiment of the present application, when the movable body is separated from the base, the antenna switching component is in a first state to connect one of the first antenna interfaces on the radio frequency reader chip with the first type of antenna; when the movable body is combined with the base, the antenna switching component is in a second state to connect one of the first antenna interfaces on the radio frequency reader chip with the antenna matching network component.

[0013] In an embodiment of the present application, the movable body also includes a position sensing component; the position sensing component is used to detect the position of the movable body, and if it is detected that the movable body is separated from the base, the antenna switching component is notified to switch to the first state; if it is detected that the movable body is combined with the base, the antenna switching component is notified to switch to the second state.

[0014] In an embodiment of the present application, the movable body also includes a microcontroller, wherein after the position sensing component detects that the movable body is separated from the base, the position sensing component sends a first information to the microcontroller, and after the microcontroller receives the first information, the microcontroller sends a first instruction to the antenna switching component, and the antenna switching component switches to the first state after receiving the first instruction; after the position sensing component detects that the movable body is combined with the base, the position sensing component sends a second information to the microcontroller, and after the microcontroller receives the second information, the microcontroller sends a second instruction to the antenna switching component, and the antenna switching component switches to the second state after receiving the second instruction.

[0015] In an embodiment of the present application, the movable body also includes a switching switch, which is coupled to the antenna switching component; the switching switch is used to control the state of the antenna switching component, and when the switching switch is set to the first position, the antenna switching component is controlled to switch to the first state; when the switching switch is set to the second position, the antenna switching component is controlled to switch to the second state.

[0016] In an embodiment of the present application, the base also includes an antenna extension component, which is coupled to the antenna matching network component. The antenna extension component is also coupled to at least one of the second antenna interfaces. The antenna extension component is used to expand each of the second antenna interfaces into multiple antenna interfaces.

[0017] In an embodiment of the present application, the base further includes a power management component, and the power management component is used to supply power to the movable body after the movable body is combined with the base.

[0018] In an embodiment of the present application, the base has a shell, and a mounting component is provided on the surface of the shell. The mounting component is used to install the base at a specified position.

[0019] In an embodiment of the present application, the movable body has a shell, and a holding portion is provided on the shell, and the holding portion is used to move the movable body.

[0020] In an embodiment of the present application, a first assembly component is provided on the outer shell of the base, and a second assembly component is provided on the outer shell of the movable body. The first assembly component corresponds to the second assembly component, and the first assembly component and the second assembly component are used to detachably assemble the movable body to the base.

[0021] An embodiment of the present application also provides a radio frequency identification method, which is based on the radio frequency card reader as described above, wherein the base of the radio frequency card reader is set at a specified position, the at least one first antenna interface is connected to a first type of antenna, and the at least one second antenna interface is connected to a second type of antenna; the radio frequency identification method includes: if the movable body is separated from the base, controlling the antenna switching component to use the at least one first antenna interface on the radio frequency card reader chip as the working antenna interface of the radio frequency card reader; controlling the first type of antenna connected to the working antenna interface to transmit a first radio frequency signal, and receiving a second radio frequency signal corresponding to the first radio frequency signal fed back by the electronic tag; and controlling the radio frequency card reader chip to process the second radio frequency signal.

[0022] In an embodiment of the present application, if the movable body and the base are combined, the antenna switching component is controlled to use at least one second antenna interface coupled to the antenna matching network component as the working antenna interface of the radio frequency reader; the second type antenna connected to the working antenna interface is controlled to transmit a third radio frequency signal, and receive a fourth radio frequency signal fed back by the electronic tag for the third radio frequency signal; and the radio frequency reader chip is controlled to process the fourth radio frequency signal.

[0023] In the embodiment of the present application, the first type of antenna includes an electrically small antenna, and the second type of antenna includes an omnidirectional antenna.

[0024] The radio frequency card reader of the embodiment of the present application changes the previous technical concept of independently designing and using a large-volume fixed card reader and a small-volume portable card reader. Instead, the large-volume base and the movable card reader body are designed as an integral whole. Through the ingenious design of the embodiment of the present application, the radio frequency card reader has the functional modes of both large-scale multi-tag recognition and close-range single-tag recognition. Users can flexibly adopt the two working modes according to their usage needs, which is convenient to use and cost-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the appearance of a radio frequency card reader according to an embodiment of the present application.

[0026] Figure 2 This is a schematic diagram of the structural status of a radio frequency card reader according to an embodiment of the present application.

[0027] Figure 3It is a schematic diagram of the structural state of a radio frequency card reader according to another embodiment of the present application.

[0028] Figure 4 It is a structural diagram of a radio frequency card reader according to another embodiment of the present application. DETAILED DESCRIPTION

[0029] The technical solutions of the embodiments of the present application will be described below in conjunction with the accompanying drawings of the embodiments of the present application. The various details of the embodiments of the present application are described to aid understanding and are merely exemplary embodiments. Those skilled in the art should recognize that various changes or modifications may be made to the described specific embodiments without violating the principles and spirit of the embodiments of the present application. Therefore, all such changes and modifications fall within the scope of protection of the embodiments of the present application. Furthermore, for clarity and conciseness, descriptions of certain well-known functions and structures have been omitted from the description of the specific embodiments, without affecting the implementation of the embodiments of the present application.

[0030] The term "and / or" is used herein to describe a relationship between multiple associated objects. For example, it can represent three possible relationships between two associated objects. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates an "or" relationship between the preceding and following associated objects.

[0031] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the various processes involved does not mean the order of execution. The execution order of each process is determined by its function and internal logic. Therefore, the size of the serial number does not constitute a special restriction on the implementation process of the embodiments of the present application.

[0032] Figure 1 The external effect diagram of a radio frequency card reader 500 according to an embodiment of the present application is schematically shown. The radio frequency card reader 500 includes a movable body 100 and a base 200. A plurality of antennas 300 ( Figure 1 In one embodiment, the antenna 300 may be an omnidirectional antenna capable of reading information over a wide range. In other embodiments, the number of antennas 300 may be 1, 2, 6, 16, or more or less.

[0033] The radio frequency card reader 500 of the embodiment of the present application is a reconfigurable RFID card reader for the following reasons: first, the base 200 has an installation component on its outer shell, and the base 200 can be installed in a specified position, for example, fixedly installed on a roof, a wall, a door frame of an entrance or exit, etc., and a radio frequency signal can be transmitted through the antenna 300; second, a card reader chip and a microcontroller are provided inside the shell of the movable body 100, and the radio frequency front end of the card reader chip has an antenna interface, which can be used to install, for example, a small antenna with lower efficiency; and the movable body 100 can be used in combination with the base 200 or separately from the base 200. For example, a first assembly component can be provided on the outer shell of the base, and a second assembly component can be provided on the outer shell of the movable body 100. The first assembly component corresponds to the second assembly component and is used to detachably assemble the movable body 100 on the base.

[0034] Based on the above-mentioned reconfigurable design principle, when the user installs the movable body 100 on the base 200 for combined use, the working antenna of the radio frequency card reader 500 is the multiple antennas 300 on the base 200 (such as omnidirectional antennas or other suitable types of antennas), and when the user removes the movable body 100 from the base 200 for separate use, the working antenna of the radio frequency card reader 500 is the antenna installed on the movable body 100 (such as a small electric antenna or other suitable types of antennas).

[0035] According to the usage requirements of different application scenarios, users can flexibly choose the combination mode or separation mode of the radio frequency card reader 500. In the combination mode, the omnidirectional antenna on the base 200 can read a large amount of tag information within a large range. In the separation mode, the user holds the movable body 100 to read the tag information within a short range. In fact, it takes into account the advantages of both the old fixed card reader and the portable card reader. The reconfigurable fusion design is not only easy to use and has a wide range of applications, but also can reduce hardware costs to a certain extent.

[0036] Figure 2 A schematic diagram showing the structural state of the radio frequency card reader in the embodiment of the present application in a separated working mode is shown. Figure 3 The schematic diagram of the structure of the radio frequency card reader in the embodiment of the present application in the combined working mode is shown.

[0037] The radio frequency card reader of the embodiment of the present application includes a movable body 100 and a base 200. Specifically, the movable body 100 includes: a radio frequency card reader chip 120, an antenna switching component 110 and a microcontroller 130, wherein the radio frequency card reader chip 120 and the antenna switching component are respectively coupled to the microcontroller, and the radio frequency card reader chip has at least one first antenna interface ( Figure 21 is shown in FIG). The base 200 includes: an antenna matching network component 210 and at least one second antenna interface ( Figure 2 4 are shown), the antenna matching network component 210 is coupled to at least one second antenna interface.

[0038] The antenna switching component 110 of the movable body 100 is used to enable the radio frequency card reader to selectively use the first antenna interface or the second antenna interface as the working antenna interface in different situations.

[0039] In one embodiment of the present application, the antenna switching component 110 may have a first state and a second state; wherein, when the movable body 100 is separated from the base 200, the antenna switching component 110 is in the first state; when the movable body 100 is combined with the base 200, the antenna switching component 110 is in the second state.

[0040] By controlling the state of the antenna switching component 110, when the movable body 100 is separated from the base 200, that is, when the antenna switching component 110 is in the first state, the radio frequency card reader uses the first antenna interface as the working antenna interface; and when the movable body 100 is combined with the base 200, that is, when the antenna switching component 110 is in the second state, the radio frequency card reader uses the second antenna interface as the working antenna interface.

[0041] The antenna matching network assembly 210 in the base 200 is used for impedance matching, enabling the system to transmit maximum signal energy and minimize the impact of echo on signal quality and available power. The antenna matching network assembly 210 in the embodiments of the present application can be implemented using existing antenna matching networks in the art, and its function and operating principle will not be further described.

[0042] The antenna switching component 110 of the embodiment of the present application can be implemented through various implementations, which are described in detail below through multiple embodiments.

[0043] Example 1

[0044] The radio frequency card reader of this embodiment includes the following Figure 2 or Figure 3 The movable body 100 and the base 200 are shown. In this embodiment, the radio frequency card reader chip 120 has a first antenna interface.

[0045] When the movable body 100 is separated from the base 200, Figure 2 As shown, the antenna switching component 110 connects a first antenna interface on the radio frequency reader chip 120 to a preconfigured first type of antenna;

[0046] When the movable body 100 is combined with the base 200 , the antenna switching component 110 connects a first antenna interface on the radio frequency reader chip 120 to the antenna matching network component 210 .

[0047] The antenna matching network component 210 is further coupled to at least one second antenna interface, and a second type of antenna can be installed on the second antenna interface.

[0048] Through the above embodiment, when the user uses the radio frequency card reader, if the user removes the movable body 100 from the base 200, the movable body 100 is separated from the base 200. At this time, the antenna switching component 110 enters the first state, which connects the first antenna interface with the preconfigured first type antenna, that is, the first antenna interface is used as the working interface, and the first type antenna sends and receives radio frequency signals to read the tag information.

[0049] If the user assembles the movable body 100 back onto the base 200 so that the movable body 100 and the base 200 are combined, the antenna switching component 110 enters the second state, disconnecting the first antenna interface from the first type of antenna and connecting the first antenna interface to the antenna matching network component 210. At this time, since the second type of antenna can be installed on one or more second antenna interfaces on the antenna matching network component 210, the radio frequency card reader uses the second antenna interface as the working interface, and the second type of antenna sends and receives radio frequency signals to read the tag information.

[0050] Taking the first type of antenna as a small electric antenna and the second type of antenna as an omnidirectional antenna as an example, when the user removes the movable body 100 from the base 200, the antenna switching component 110 connects the first antenna interface on the radio frequency reader chip 120 in the movable body 100 with the small electric antenna. The user can hold the movable body 100 and move it within the target area to read the tag information at close range, thereby conveniently tracking and locating the tag.

[0051] After the user installs the movable body 100 back on the base 200, the antenna switching component 110 connects the first antenna interface in the movable body 100 with the antenna matching network component 210 in the base 200, so that the antenna matching network component 210 can receive the radio frequency signal emitted by the radio frequency reader chip 120, and then transmit and receive the radio frequency signal through the omnidirectional antenna on the coupled second antenna interface, so that the tags within the coverage range of the omnidirectional antenna can be tracked, completing the switching between the two working modes.

[0052] Example 2

[0053] The radio frequency card reader of this embodiment includes the following Figure 2 or Figure 3The movable body 100 and base 200 are shown. The main difference between this embodiment and embodiment 1 is that the RF card reader chip 120 has multiple first antenna interfaces. For example, the RF card reader chip 120 has multiple RF front ends, each of which has a first antenna interface. In this case, a multi-way switching component (not shown) is connected to the multiple first antenna interfaces. The multi-way switching component can select one first antenna interface from the multiple first antenna interfaces. Specifically, the multi-way switching component is connected to the microcontroller 130 and can select one first antenna interface from the multiple first antenna interfaces according to the instructions of the microcontroller 130 to connect, while the other first antenna interfaces are disconnected.

[0054] In this embodiment, when the main body is separated from the base, the antenna switching component 110 connects the multi-way switching component with the first type of antenna. When the main body and the base are combined, the antenna switching component 110 connects the multi-way switching component with the antenna matching network component 210. In this way, the radio frequency signal can pass through the first antenna interface in the movable body 100, the multi-way switching component, the antenna switching component 110, the antenna matching network component 210 in the base 200 and the second antenna interface in sequence, and finally reach the second type of antenna, thereby completing the switching between the two working modes.

[0055] Example 3

[0056] The radio frequency card reader of this embodiment includes the following Figure 2 or Figure 3 The movable body 100 and the base 200 are shown. The main difference between this embodiment and embodiment 1 is that the movable body 100 of this embodiment further includes a switch (not shown in the figure), which is coupled to the antenna switching component 110 and is used to control the state of the antenna switching component 110. When the switch is set to the first gear, it controls the antenna switching component 110 to switch to the first state, thereby using the first antenna interface on the movable body 100 as the working interface; when the switch is set to the second gear, it controls the antenna switching component 110 to switch to the second state, thereby using the second antenna interface on the base 200 as the working interface.

[0057] When using the RF card reader of this embodiment, the user can actively switch the working mode of the card reader through the switch. For example, when the user removes the movable body 100 from the base, the switch can be turned to the first gear position to switch the antenna switching component 110 to the first state. At this time, the separated working mode is entered, and the user can start to hold the movable body 100 to read the target tag information; after the user puts the movable body 100 back on the base 200, the switch can be turned to the second gear position to switch the antenna switching component 110 to the second state. The RF card reader enters the combined working mode and can start to read the tag data within a larger range. Among them, Figure 2 and Figure 3 As shown, the base 200 may include a microcontroller 230 for performing corresponding control on the base 200 .

[0058] Example 4

[0059] The radio frequency card reader of this embodiment includes the following Figure 2 or Figure 3 The movable body 100 and the base 200 are shown. The main difference between this embodiment and embodiment 3 is that this embodiment does not control the state of the antenna switching component 110 by switching the switch, but instead installs a position sensing component to detect the position of the movable body 100 and determine the working state of the radio frequency card reader.

[0060] Specifically, if the position sensing component detects that the movable body 100 is separated from the base 200, the antenna switching component 110 is notified to switch to the first state; if the position sensing component detects that the body and the base are combined, the antenna switching component is notified to switch to the second state.

[0061] In one possible embodiment, the position sensing component can be implemented using a variety of components. For example, at least one of a short-circuit switch, an infrared sensor, and a proximity switch can be installed on the movable body 100 and / or the base 200 to detect whether the movable body 100 is installed in combination at a specified position on the base 200.

[0062] The position sensing component is coupled to the microcontroller, for example, coupled to the microcontroller 130 on the movable body 100 and / or the microcontroller 230 on the base 200. When the position sensing component detects that the body is separated from the base, it sends a first message to the microcontroller. After receiving the first message, the microcontroller sends a first instruction to the antenna switching component. After receiving the first instruction, the antenna switching component switches to the first state. Similarly, when the position sensing component detects that the body is combined with the base, it sends a second message to the microcontroller. After receiving the second message, the microcontroller sends a second instruction to the antenna switching component. After receiving the second instruction, the antenna switching component switches to the second state, thereby realizing the switching between the two working modes of the radio frequency card reader.

[0063] Example 5

[0064] The radio frequency card reader of this embodiment includes the following Figure 2 or Figure 3 The movable body 100 and base 200 are shown. In this embodiment, the base 200 further includes an antenna extension assembly, which is coupled to the antenna matching network assembly 210 and to at least one second antenna interface. The antenna extension assembly can expand one antenna interface into multiple antenna interfaces, allowing the card reader to accommodate more antennas.

[0065] During operation, in the combined working mode of the RF card reader, the antenna matching network component 210 receives the RF signal transmitted by the antenna switching component 110, and the RF signal can be transmitted to each second type antenna, such as an omnidirectional antenna, through the antenna extension component.

[0066] By utilizing this embodiment, the effective reading range of the card reader can be increased and the performance of the card reader can be improved by placing the antennas at different spatial positions.

[0067] Example 6

[0068] The radio frequency card reader of this embodiment includes the following Figure 2 or Figure 3 The removable body 100 and base 200 are shown. In this embodiment, the base 200 also includes a power management component that can power the body in the combined operation mode of the RFID reader. For example, if the body is equipped with a rechargeable battery, such as a lithium battery, the power management component can charge the battery in the body, ensuring sufficient power when the body is removed for standalone operation.

[0069] Based on any one of the above-described embodiments 1-6 or a combination of multiple embodiments, a radio frequency identification method may be performed, including the following steps:

[0070] S101, if the movable body 100 is separated from the base 200, the antenna switching component 110 is controlled to use at least one first antenna interface on the radio frequency reader chip 120 as a working antenna interface of the radio frequency reader;

[0071] S102, controlling a first type of antenna connected to the working antenna interface to transmit a first radio frequency signal and receive a second radio frequency signal fed back by the electronic tag;

[0072] S103: Control the radio frequency card reader chip to process the second radio frequency signal.

[0073] Furthermore, the following radio frequency identification method may be performed:

[0074] S201, if the movable body 100 and the base 200 are combined, control the antenna switching component 110 to use at least one second antenna interface coupled to the antenna matching network component 210 as a working antenna interface of the radio frequency card reader;

[0075] S202, controlling the second type antenna connected to the working antenna interface to transmit a third radio frequency signal and receive a fourth radio frequency signal fed back by the electronic tag;

[0076] S203: Control the radio frequency card reader chip to process the fourth radio frequency signal.

[0077] Using the above-mentioned radio frequency identification method, users can flexibly select the combination mode or separation mode of the radio frequency card reader. In the combination mode, a large amount of tag information within a large range can be read. In the separation mode, the handheld movable body can read tag information within a short range. The working mode switching is convenient and easy to use.

[0078] It should be noted that the term "removable body" used herein may also refer to a removable module, a removable part, a removable assembly, a mobile module, a mobile part, or a mobile assembly, etc. The tags involved in the embodiments of the present application may be active tags, passive tags, and / or semi-active tags already known in the art; the antenna interfaces and antennas involved in the embodiments of the present application may be antenna interfaces and antennas that comply with relevant standards, and there are no additional restrictions on the type and model of the antenna; the components involved in the embodiments of the present application, such as short-circuit switches, may adopt existing related electronic components, circuit modules, or functional modules, and the implementation of the embodiments of the present application has no special requirements or restrictions on the above.

[0079] In order to more clearly describe the implementation process of the embodiment of the present application, Figure 4The structural diagram of a reconfigurable RFID reader of an embodiment of the present application is schematically shown, which includes: a fixed base and a mobile module, wherein the mobile module includes an RFID reader chip, and the fixed base does not include a reader chip. Furthermore, the mobile module includes an antenna switcher and a position sensor. The antenna switcher can switch the antenna interface led out of the chip to the electrically small and strong polarized antenna provided by the mobile module, or switch the antenna interface led out of the chip to the antenna interface of the fixed base.

[0080] Specifically, the mobile module also includes a microcontroller, a network interface module, and memory modules. The RFID reader chip houses the radio frequency front-end module, digital signal processing module, clock, and power management modules. The fixed base includes the antenna matching network, antenna extender, microcontroller, and power management module.

[0081] The position sensor detects the location of the mobile module, that is, whether it is connected to the fixed base (i.e., combined mode) or disconnected (i.e., separated mode). The microcontroller in the mobile module uses the position status of the mobile module reported by the position sensor to change the state of the antenna switch.

[0082] When the mobile reader module is placed on the fixed base, the antenna switch switches the antenna to the matching network port on the fixed base. The matching network is connected to the fixed base's antenna via an antenna extender. The fixed base's antenna uses an omnidirectional antenna to maximize reading coverage. Furthermore, the fixed base's power management module provides power to the mobile module. When the mobile module is separated from the fixed base, its own power supply maintains operation, and the antenna switch switches the antenna to the mobile module's low-power, high-polarization antenna, thus enabling the handheld reader function.

[0083] The reconfigurable RFID reader of the embodiment of the present application is unprecedented in that it realizes both fixed and portable working modes with a single RFID reader chip, which not only saves hardware costs but also simplifies two independent devices and integrates them into one device. The radio frequency identification method based on this device can take into account both multi-tag identification in a large range and single-tag identification at close range, providing users with a convenient operation method to the greatest extent possible.

[0084] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0085] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A radio frequency card reader, comprising: base and movable body, wherein The movable body includes a radio frequency card reader chip and an antenna switching component, wherein the radio frequency card reader chip has at least one first antenna interface; The base includes an antenna matching network component and at least one second antenna interface, wherein the antenna matching network component is coupled to the at least one second antenna interface; wherein The antenna switching component is used for: When the movable body is separated from the base, at least one first antenna interface on the radio frequency card reader chip serves as a working antenna interface of the radio frequency card reader; and When the movable body is combined with the base, at least one second antenna interface coupled to the antenna matching network component serves as a working antenna interface of the radio frequency card reader.

2. The radio frequency card reader according to claim 1, wherein: The radio frequency card reader chip has a first antenna interface; When the movable body is separated from the base, the antenna switching component is used to connect one of the first antenna interfaces on the radio frequency card reader chip to the first type of antenna; When the movable body is combined with the base, the antenna switching component is used to connect one of the first antenna interfaces on the radio frequency card reader chip to the antenna matching network component.

3. The radio frequency card reader according to claim 1, wherein: The radio frequency card reader chip has a plurality of the first antenna interfaces, and the plurality of the first antenna interfaces are coupled to a multi-way switching component, and the multi-way switching component is used to select one of the plurality of the first antenna interfaces; When the movable body is separated from the base, the antenna switching component is used to connect the multi-way switching component to the first type of antenna; and When the movable body is combined with the base, the antenna switching component is used to connect the multi-way switching component with the antenna matching network component.

4. The radio frequency card reader according to any one of claims 1 to 3, wherein: When the movable body is separated from the base, the antenna switching component is in a first state to connect one of the first antenna interfaces on the radio frequency reader chip to the first type of antenna; When the movable body is combined with the base, the antenna switching component is in the second state to connect one of the first antenna interfaces on the radio frequency reader chip to the antenna matching network component.

5. The radio frequency card reader according to claim 4, wherein: The movable body further includes a position sensing component; The position sensing component is used to: detecting a position of the movable body; If it is detected that the movable body is separated from the base, notifying the antenna switching component to switch to the first state; If it is detected that the movable body is combined with the base, the antenna switching component is notified to switch to the second state.

6. The radio frequency card reader according to claim 5, wherein: The movable body further comprises a microcontroller, wherein, After the position sensing component detects that the movable body is separated from the base, the position sensing component sends a first message to the microcontroller. After receiving the first message, the microcontroller sends a first instruction to the antenna switching component. After receiving the first instruction, the antenna switching component switches to the first state. After the position sensing component detects that the movable body is combined with the base, it sends a second message to the microcontroller. After receiving the second message, the microcontroller sends a second instruction to the antenna switching component. After receiving the second instruction, the antenna switching component switches to the second state.

7. The radio frequency card reader according to claim 4, wherein: The movable body further includes a switch coupled to the antenna switching assembly; The switch is used to: controlling the state of the antenna switching component; When the switch is set to the first position, the antenna switching component is controlled to switch to the first state; When the switch is set to the second position, the antenna switching component is controlled to switch to the second state.

8. The radio frequency card reader according to any one of claims 1 to 3, wherein: The base also includes an antenna extension component, which is coupled to the antenna matching network component. The antenna extension component is also coupled to at least one of the second antenna interfaces. The antenna extension component is used to expand each of the second antenna interfaces into multiple antenna interfaces.

9. The radio frequency card reader according to any one of claims 1 to 3, wherein: The base further includes a power management component, and the power management component is used to supply power to the movable body after the movable body is combined with the base.

10. The radio frequency card reader according to any one of claims 1 to 3, wherein: The base has a shell, and a mounting assembly is provided on the shell. The mounting assembly is used to mount the base at a designated position.

11. The radio frequency card reader according to any one of claims 1 to 3, wherein: The movable body has a shell, and a holding portion is provided on the shell. The holding portion is used to move the movable body.

12. The radio frequency card reader according to any one of claims 1 to 3, wherein: A first assembly component is provided on the outer shell of the base, and a second assembly component is provided on the outer shell of the movable body. The first assembly component corresponds to the second assembly component, and the first assembly component and the second assembly component are used to detachably assemble the movable body to the base.

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