Radio frequency card reader and radio frequency identification method

Abstract

A radio frequency card reader (500) and a radio frequency identification method. The radio frequency card reader (500) comprises a base (200) and a movable body (100), wherein the movable body (100) comprises: a radio frequency card reader chip (120) and an antenna switching component (110), the radio frequency card reader chip (120) having at least one first antenna interface; the base (200) comprises: an antenna matching network component (210) and at least one second antenna interface, the antenna matching network component (210) being coupled to the at least one second antenna interface, and the working mode of the radio frequency card reader can be flexibly switched according to demand by using the cooperation of the base (200) and the movable body (100).

Description

Background Art

[0002] Radio Frequency Identification (RFID) technology is widely used in industrial and commercial environments to achieve the purpose of identifying and tracking objects. RFID systems can generally be divided into two categories: active and passive. Taking the passive RFID system as an example, a passive RFID system usually includes at least one RFID reader, a reader antenna, a server that can communicate with the RFID reader, and a large number of RFID passive tags attached to the tracked objects.

[0003] In the RFID system, the RFID reader (referred to as "reader") plays an important role. On the one hand, the reader obtains the RFID tag information within the rated range through the reader antenna; on the other hand, the reader communicates with the server, outputs the read information to the server, and also obtains instructions from the server, thereby achieving the purpose of target identification, data transmission and process control.

[0004] For different application scenarios or different application purposes, there are currently two types of card reader products that can be used, one is a fixed card reader and the other is a portable card reader. Fixed card readers are larger in size, so they are often fixed in a specific location for use. They usually have multiple antenna interfaces and a large effective reading range, which are suitable for multi-tag, large-scale object identification and tracking. In contrast to fixed card readers, portable card readers are smaller in size and mostly use a single, less efficient reader antenna. They have a smaller effective reading range and are usually held by operators and close to the tag to read information. They are 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, the 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 comprises 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 comprises 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 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 first antenna interfaces from 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 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, and the mounting component is used to install the base at a specified position.

[0019] In the 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 reader as described above, wherein the base of the radio frequency 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 reader chip as the working antenna interface of the radio frequency 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 for the first radio frequency signal fed back by the electronic tag; and controlling the radio frequency reader chip to process the second radio frequency signal.

[0022] In an embodiment of the present application, if the movable body is combined with the base, 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 for the third radio frequency signal fed back by the electronic tag; 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 idea of ​​independently designing and using a large-volume fixed card reader and a small-volume portable card reader, and instead designs a large-volume base and a movable card reader body as an integral whole. Through the ingenious design of the embodiment of the present application, the radio frequency card reader has both the functional modes of large-range multi-tag recognition and short-range single-tag recognition. Users can flexibly adopt the two working modes according to their usage requirements, which is easy to use and cost-saving. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0026] Figure 2 It 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 status of a radio frequency card reader according to another embodiment of the present application.

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

[0029] The technical scheme of the embodiment of the present application will be described below in conjunction with the accompanying drawings of the embodiment of the present application. Among them, the various details of the embodiment of the present application are described to help understand, only as an exemplary implementation, and those skilled in the art should recognize that various changes or modifications can be made to the specific implementation described, but will not violate the principles and spirit of the embodiment of the present application, so these changes and modifications all fall within the protection scope of the embodiment of the present application. In addition, for clarity and conciseness, the description of some well-known functions and structures is omitted in the description of the specific implementation, which does not affect the implementation of the embodiment of the present application.

[0030] The term "and / or" in this article is used to describe the association relationship between multiple associated objects, for example, to represent three possible association relationships between two associated objects. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[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 limitation on the implementation process of the embodiments of the present application.

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

[0033] The radio frequency card reader 500 of the embodiment of the present application is a reconfigurable RFID card reader, because: first, the base 200 has a mounting component on the 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 and exit, etc., and a radio frequency signal can be transmitted through the antenna 300; secondly, a card reader chip and a microprocessor are arranged inside the shell of the movable body 100, and the radio frequency front end of the card reader chip has an antenna interface, and a small antenna with low efficiency can be installed, for example; and the movable body 100 can be used in combination with the base 200, and can also be used separately from the base 200, for example, a first assembly component can be arranged on the outer shell of the base, and a second assembly component can be arranged on the outer shell of the movable body 100, and 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 state 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. 1 ). 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 realize that in different situations, the radio frequency card reader can choose to use the first antenna interface or the second antenna interface as the working antenna interface.

[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 component 210 in the base 200 is used for impedance matching, which enables the system to transmit the maximum signal energy and reduce the impact of the echo on the signal quality and available power. The antenna matching network component 210 in the embodiment of the present application can be implemented by an existing antenna matching network in the art, and its function and working principle will not be described in detail.

[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: 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 card reader chip 120 to the antenna matching network component 210 .

[0047] The antenna matching network component 210 is also 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 implementation, when the user removes the movable body 100 from the base 200 during use of the radio frequency card reader, the movable body 100 is separated from the base 200, and 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 is combined with the base 200, the antenna switching component 110 enters the second state, which disconnects the first antenna interface from the first type of antenna and connects 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 card 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 a close distance, thereby conveniently tracking and locating the tag.

[0051] After the user installs the movable body 100 back onto 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 card 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: Figure 2 or Figure 3The movable body 100 and the base 200 are shown. The main difference between this embodiment and embodiment 1 is that the radio frequency card reader chip 120 has multiple first antenna interfaces, such as the radio frequency card reader chip 120 has multiple radio frequency front ends, and each radio frequency front end has a first antenna interface. At this time, a multi-way switching component (not shown in the figure) is connected to the multiple first antenna interfaces, and the multi-way switching component can select a first antenna interface from the multiple first antenna interfaces. Specifically, the multi-way switching component is connected to the microprocessor 130, and can select a first antenna interface from the multiple first antenna interfaces according to the instruction of the microprocessor 130 to be connected, and 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 is combined with the base, the antenna switching component 110 connects the multi-way switching component with the antenna matching network component 120. 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 120 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: 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 switching 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 switching switch is set to the first gear, it controls the antenna switching component 110 to switch to the first state, so that the first antenna interface on the movable body 100 is used as the working interface; when the switching switch is set to the second gear, it controls the antenna switching component 110 to switch to the second state, so that the second antenna interface on the base 200 is used 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 switching switch. For example, when the user removes the movable body 100 from the base, the switching switch can be turned to the first 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 switching switch can be turned to the second position to switch the antenna switching component 110 to the second state, and the RF card reader enters the combined working mode and can start to read the tag data within a larger range around it.

[0058] Example 4

[0059] The radio frequency card reader of this embodiment includes: 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 detects the position of the movable body 100 by installing a position sensing component to 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 implementation, the position sensing component may be implemented using a variety of components, for example, at least one of a short-circuit switch, an infrared sensor, and a proximity switch may 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. When the position sensing component detects that the main body is separated from the base, the first information is sent to the microcontroller. After receiving the first information, 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 main body is combined with the base, the second information is sent to the microcontroller. After receiving the second information, 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 of the two working modes of the radio frequency card reader.

[0063] Example 5

[0064] The radio frequency card reader of this embodiment includes: Figure 2 or Figure 3The movable body 100 and the base 200 are shown. The base 200 in this embodiment also includes an antenna extension component, which is coupled to the antenna matching network component 120 and is also coupled to at least one second antenna interface. The antenna extension component can expand one antenna interface into multiple antenna interfaces, and more antennas can be installed for the card reader.

[0065] During operation, in the combined working mode of the RF card reader, the antenna matching network component 120 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 using 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: Figure 2 or Figure 3 The movable body 100 and the base 200 are shown. The base 200 in this embodiment also includes a power management component, which can supply power to the body in the combined working mode of the radio frequency card reader. For example, if a rechargeable battery such as a lithium battery is provided on the body, the power management component can charge the battery of the body, so that the body can have sufficient power when it is removed and works alone.

[0069] Based on any one of the embodiments 1-6 described above or a combination of multiple embodiments, a radio frequency identification method may be executed, 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, controlling the radio frequency card reader chip to process the second radio frequency signal.

[0073] In addition, the following radio frequency identification method may also 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 receiving a fourth radio frequency signal fed back by the electronic tag;

[0076] S203, controlling the radio frequency card reader chip to process a fourth radio frequency signal.

[0077] Using the above-mentioned radio frequency identification method, users can flexibly choose 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 the 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 in this article can also be expressed as 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 can be active tags, passive tags and / or semi-active tags already available in the art; the antenna interface and antenna involved in the embodiments of the present application can 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 such as short-circuit switches involved in the embodiments of the present application can 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 content.

[0079] In order to more clearly describe the implementation process of the embodiment of the present application, Figure 4 The 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 the reader chip. Further, the mobile module includes an antenna switch and a position sensor, and the antenna switch can switch the antenna interface led out of the chip to the electrically small and strong polarized antenna of 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, a memory module, etc. Among them, the RFID reader chip has a radio frequency front-end module, a digital signal processing module, a clock, a power management module, etc. The fixed base includes an antenna matching network, an antenna extender, a microcontroller, a power management module, etc.

[0081] The position sensor can detect the position of the mobile module, that is, whether the mobile module is connected to the fixed base (i.e., combined mode) or disconnected (i.e., separated mode). The microprocessor in the mobile module can change the state of the antenna switch based on the position state of the mobile module reported by the position sensor.

[0082] When the mobile module of the card reader is placed on the fixed base, the antenna switch switches the antenna to the matching network port of the fixed base. The matching network is connected to the antenna of the fixed base through the antenna extender. The antenna of the fixed base uses an omnidirectional antenna to increase the reading coverage. In addition, the power management module of the fixed base supplies power to the mobile module. When the mobile module is separated from the fixed base, the mobile module has its own power supply to maintain its operation, and the antenna switch switches the antenna to the electrically small and strong polarized antenna on the mobile module, thereby realizing the handheld card 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 one 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 the device can take into account multi-tag identification in a large range and single-tag identification at close range, thereby providing users with a convenient operation method to the greatest extent possible.

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

[0085] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A radio frequency card reader, comprising: base and a movable body, wherein The movable body comprises 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, the antenna matching network component is coupled to the at least one second antenna interface, wherein the movable body is detachably mounted on the base; 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 is used 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 is used as a working antenna interface of the radio frequency card reader; 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, wherein the first type of antenna and the second type of antenna are of different types.

2. The radio frequency card reader according to claim 1, wherein: The radio frequency card reader chip has the 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 first antenna interfaces from 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 with 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 claim 1, 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 card reader chip to 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 card reader chip to the antenna matching network component.

5. The radio frequency card reader according to claim 4, wherein: The movable body also includes a position sensing component; The position sensing component is used for: detecting a position of the movable body; If it is detected that the movable body is separated from the base, instructing 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 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 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, the second information is sent to the microcontroller. After receiving the second information, 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 comprises a switching switch, wherein the switching switch is 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 switching switch is set to the second gear 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 7, 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 7, 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 7, wherein: The base has a shell, and a mounting assembly is arranged 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 7, wherein: The movable body has a shell, and a holding portion is arranged 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 7, wherein: A first assembly component is arranged on the outer shell of the base, and a second assembly component is arranged 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.

13. The radio frequency card reader according to any one of claims 1 to 7, wherein: The first type of antenna includes electrically small antennas, and the second type of antenna includes omnidirectional antennas.

14. A radio frequency identification method, based on the radio frequency card reader according to any one of claims 1 to 13, wherein: The base of the radio frequency card reader is arranged at a designated 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, wherein the first type of antenna and the second type of antenna are of different types; The method comprises: If the movable body is separated from the base, the antenna switching component is controlled to use at least one first antenna interface on the radio frequency card reader chip as a working antenna interface of the radio frequency card reader; Controlling a first type of antenna connected to the working antenna interface to transmit a first radio frequency signal, and receiving a second radio frequency signal fed back by the electronic tag in response to the first radio frequency signal; The radio frequency card reader chip is controlled to process the second radio frequency signal.

15. The method according to claim 14, wherein: The method further comprises: 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 a working antenna interface of the radio frequency card reader; Controlling the second type antenna connected to the working antenna interface to transmit a third radio frequency signal, and receiving a fourth radio frequency signal for the third radio frequency signal fed back by the electronic tag; The radio frequency card reader chip is controlled to process the fourth radio frequency signal.

16. The method according to claim 14 or 15, wherein: The first type of antenna includes electrically small antennas, and the second type of antenna includes omnidirectional antennas.

Images