Battery-free maintenance-free electronic tag control system and control method

Abstract

The invention is suitable for the field of electronic tags, and provides a battery-free maintenance-free electronic tag control system and control method. The system comprises a host module and a slave module which are fixed on a guide rail, the host module comprises a solar cell panel and a capacitor, the solar cell panel is configured to receive indoor light energy, and the capacitor is configured to store electric energy converted from the light energy; the host module provides electric energy for the electronic tag of the slave module based on the guide rail; the host module sends a data signal to the electronic tag of the slave module by means of the guide rail; according to the electronic tag, lasting and stable operation and efficient content updating of the electronic tag can be achieved through solar power supply, the electronic tag does not need to replace a battery, the maintenance cost is reduced, and meanwhile the content updating efficiency and flexibility of the electronic tag can be improved. The system can be suitable for various application scenes in indoor and low-light environments.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic tags, and in particular relates to a battery-free and maintenance-free electronic tag control system and control method. Background Art

[0002] Most traditional electronic tags are powered by batteries, which have defects such as limited battery life, the need for regular battery replacement, and high maintenance costs. For application scenarios with a large number of electronic tags distributed indoors, the inability of batteries to operate stably and sustainably will also affect the timely update of the electronic tag content. Summary of the invention

[0003] The embodiments of the present application provide a battery-free and maintenance-free electronic tag control system and control method, which can solve the technical problems in the prior art that electronic tags have limited battery life and cannot be kept stable for a long time, resulting in high battery maintenance costs and affecting the timely update of content of electronic tags.

[0004] In a first aspect, the present application provides a battery-free and maintenance-free electronic tag control system, the control system comprising a host module and a slave module fixed to a guide rail; the host module is configured to provide power to the electronic tag of the slave module based on the guide rail;

[0005] The host module is used to send a data signal to the electronic tag of the slave module by means of the guide rail;

[0006] The host module includes a solar panel and a capacitor; the solar panel is configured to receive indoor light energy, and the capacitor is configured to store electrical energy converted from the light energy.

[0007] In particular, the guide rail is a metal guide rail, the slave module includes an electronic tag, the electronic tag is equipped with a metal piece, the electronic tag is fixed to the metal guide rail through the metal piece, and the metal piece is in contact with the conductive metal strip of the metal guide rail; the host module sends a data signal to the electronic tag with the help of the metal guide rail.

[0008] In particular, the host module includes a wireless transceiver module and a first power carrier module; the electronic tag internally includes a second controller and a second power carrier module;

[0009] The wireless transceiver module is configured to receive data signals transmitted by the indoor base station;

[0010] The first power carrier module is configured to modulate the data signal onto the guide rail for transmission;

[0011] The second power carrier module is used to receive the data signal, and demodulate the data signal and transmit it to the second controller.

[0012] In particular, the host module further comprises a first controller;

[0013] The first controller is used to determine the target slave module corresponding to the data signal, and call the first power carrier module to modulate the data signal onto the guide rail for transmission to the electronic tag of the target slave module.

[0014] In particular, the electronic tag also includes a display module;

[0015] The display module is used to display the to-be-displayed content related to the data signal.

[0016] In particular, the indoor base station is configured to communicate with n host modules, and each of the host modules is configured to control m slave modules.

[0017] In a second aspect, the present application provides a battery-free and maintenance-free electronic tag control method, the method being applied to the system as described in the first aspect above, the control system comprising a host module and a slave module fixed to a guide rail, the method comprising:

[0018] The host module receives indoor light energy through a solar cell panel and converts the indoor light energy into electric energy, and transmits the electric energy and a data signal to the electronic tag of the slave module based on the guide rail.

[0019] In particular, the guide rail is a metal guide rail, the electronic tag is provided with a metal piece, the electronic tag is fixed to the metal guide rail through the metal piece, and the metal piece is in contact with a conductive metal strip of the metal guide rail;

[0020] The method further comprises:

[0021] The host module receives the data signal, determines the target slave module to which the data signal points, and transmits the data signal to the target slave module based on the metal rail;

[0022] The target slave module obtains the content to be displayed from the data signal, and displays the content to be displayed.

[0023] In particular, the host module includes a wireless transceiver module, a first controller and a first power carrier module; the electronic tag includes a second controller and a second power carrier module, and the method further includes:

[0024] The host module receives a data signal, determines a target slave module to which the data signal points, and transmits the data signal to the target slave module based on the metal rail, including:

[0025] The wireless transceiver module receives the data signal transmitted by the indoor base station;

[0026] The first controller determines the target slave module to which the data signal points, and calls the first power carrier module to modulate the data signal onto the metal rail, so as to transmit the data signal to the target slave module;

[0027] The target slave module acquires the content to be displayed from the data signal, and displays the content to be displayed, including:

[0028] The target slave module calls the second power carrier module to demodulate the data signal;

[0029] The second controller obtains the content to be displayed from the data signal, and displays the content to be displayed in the display module.

[0030] In a third aspect, the present application also provides another battery-free maintenance-free electronic tag control method, the method is applied to an indoor base station, the indoor base station is configured to communicate with n host modules, each of the host modules is configured to control m slave modules; the slave module and the host module have a mapping management relationship, the method includes:

[0031] Obtaining an update instruction for a target electronic tag input by a user;

[0032] Determine the target mapping management relationship corresponding to the slave module where the target electronic tag is located;

[0033] Determine the target host module corresponding to the target electronic tag based on the mapping management relationship;

[0034] The update instruction is sent to the target host module, so that the target host module transmits the data signal to the target electronic tag.

[0035] The beneficial effects of the embodiments of the present application are: the electronic tag can be operated stably and efficiently updated through solar power supply, and the electronic tag of the system does not need to replace the battery, which reduces the maintenance cost, and can improve the efficiency and flexibility of the content update of the electronic tag. It is suitable for various indoor and low-light environment application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0037] Figure 1 is a schematic diagram of a master module and a slave module of a control system of an embodiment of the present application being fixed on a guide rail;

[0038] Figure 2 It is a structural diagram of an embodiment of the host module and the slave module in a specific implementation of the embodiment of the present application;

[0039] Figure 3 This is a flow chart of an embodiment of a battery-free and maintenance-free electronic tag control method of the present application;

[0040] Figure 4 It is a schematic diagram of a battery-free and maintenance-free electronic tag control system provided by an embodiment of the present application deployed indoors;

[0041] Figure 5 It is a flowchart of another embodiment of the battery-free and maintenance-free electronic tag control method of the present application. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0044] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] It is understandable that most traditional electronic tags are powered by batteries, which have defects such as limited battery life, the need for regular battery replacement, and high maintenance costs. For application scenarios with a large number of electronic tags distributed indoors, the inability of batteries to operate stably and sustainably will also affect the timely update of the electronic tag content.

[0046] In view of the above-mentioned technical defects of the prior art, the embodiments of the present application provide a battery-free and maintenance-free electronic tag control system and control method, which realizes the long-term stable operation and efficient content update of the electronic tag through solar power supply and power carrier. The electronic tag of the embodiment of the present application does not need to replace the battery, which reduces the maintenance cost and improves the efficiency and flexibility of content update. It is suitable for various application scenarios in indoor and low-light environments. The technical solution of the present application is explained below through specific embodiments.

[0047] Embodiment 1

[0048] like Figure 1 As shown, the embodiment of the present application provides a battery-free and maintenance-free electronic tag control system, the control system includes a host module 01 and a slave module 02 fixed to a guide rail 03;

[0049] The host module 01 is configured to provide power to the electronic tag of the slave module 02 based on the guide rail 03;

[0050] The host module 01 is used to send data signals to the electronic tag of the slave module 02 by means of the guide rail 03;

[0051] The host module 01 includes a solar panel 010 and a capacitor 012; the solar panel 010 is configured to receive indoor light energy, and the capacitor 012 is configured to store electrical energy converted from light energy. Specifically, the host module 01 can also be an electronic tag in nature, and of course the host module 01 can also be a small terminal device: the host module is composed of a solar panel, a capacitor and a first controller.

[0052] In a specific implementation, the capacitor 012 can be a supercapacitor (ultracapacitor), and the solar panel 010 is used to receive indoor light energy and store electrical energy using the supercapacitor. The first controller 011 can be a low-cost microcontroller (MCU, Microcontroller Unit), and the first controller 011 cooperates with the wireless transceiver module 013 to form a wireless communication MCU, (wireless transceiver module 013) can use wireless communication technology to communicate with the base station, receive the data signal transmitted by the indoor base station, and store the data corresponding to the data signal. In addition, the wireless communication MCU also uses power carrier communication technology to send data signals to the electronic tag of the slave module 02 through the conductive metal strip on the guide rail 03.

[0053] In the embodiment of the present application, the guide rail 03 is a metal guide rail, the slave module 02 includes an electronic tag, the electronic tag is equipped with a metal part, the electronic tag is fixed to the metal guide rail 03 through the metal part, and the metal part is in contact with the conductive metal strip 031 of the metal guide rail 03; the host module 01 sends a data signal to the electronic tag of the slave module 02 with the help of the metal guide rail 03.

[0054] In a specific implementation, the metal piece of the electronic tag of the slave module 02 may be composed of two metal spring sheets, which are used to contact the conductive metal strip 031 on the guide rail 03 for power supply and communication. The guide rail 03 may have two conductive metal strips 031, which are used to provide power and communication channels for the electronic tag of the slave module 02. The electronic tag of the slave module 02 includes a second controller 021 and a display module 022 (such as Figure 2 The second controller 021 of the slave module 02 can adopt a low-cost microcontroller (MCU, Microcontroller Unit), and the display module 022 can adopt an ink screen without battery power supply.

[0055] Furthermore, in some embodiments, the host module 01 further includes a first power carrier module 014; the electronic tag of the slave module 02 further includes a second power carrier module 024;

[0056] The host module 01 (first power carrier module 014) and the slave module 02 (second power carrier module 024) communicate with each other using power carrier communication technology, which realizes data transmission by supplying power superimposed with high-frequency signals on the line. The first power carrier module 014 modulates the data signal onto the metal rail 03 for transmission, while the second power carrier module 024 receives the data signal and transmits it to the second controller 021 after demodulating the data signal. For example, in a specific application, after the electronic tag of the slave module 02 receives the power and data signal, the second controller 021 decides whether to update the content currently displayed in the display module 022 according to the instruction data in the transmitted data signal.

[0057] The beneficial effects of the embodiments of the present application are: the electronic tag can be operated stably and permanently by solar power supply and power carrier module, and the system of the present application does not need to replace batteries, which reduces maintenance costs. Meanwhile, the stable operation of the electronic tag can help the display content of the electronic tag to be updated in a timely and efficient manner, which can improve the efficiency and flexibility of updating the content of the electronic tag. It is suitable for various application scenarios in indoor and low-light environments.

[0058] Embodiment 2

[0059] Based on the battery-free and maintenance-free electronic tag control system provided in the first embodiment above, the present application embodiment provides a control method such as: Figure 3 As shown, the control method includes:

[0060] Step S10, the host module receives the data signal, determines the target slave module to which the data signal points, and transmits the data signal to the target slave module based on the metal rail;

[0061] It is understandable that the electronic tags of the slave modules in the embodiment of the present application are deployed on indoor supermarket shelves as an example. The electronic tags of each slave module are used to display the unit price of a specified item on the shelf. In shopping malls, the prices of some items need to be changed frequently. The prices in the morning, afternoon and evening are different, but the overall price is unchanged, such as a certain category of vegetables. The price this morning is 5 yuan, and in the evening it is 2 yuan. The next morning is still 5 yuan, and in the afternoon it is 2 yuan, which requires frequent manual changes.

[0062] In a specific implementation, the wireless transceiver module of the host module receives the data signal transmitted by the indoor base station; the data signal may be an update command for the currently displayed content of the electronic tag, for example, the current price of the electronic tag is 5 yuan, which needs to be changed to 2 yuan. The data signal may also include the target slave identification code to be updated. The host module may poll each slave module. Only when the slave module's own identification code is consistent with the identification code in the update command, the corresponding target slave module will receive the data signal. The electronic tags of other slave modules with inconsistent identification codes are in a silent state.

[0063] For example, the data signal may be a signal with an electronic tag for a certain product (i.e., a slave module responsible for displaying the product) sent by the system maintenance personnel of the mall through an indoor base station;

[0064] The first controller of the host module determines the target slave module to which the data signal points, and calls the first power carrier module to modulate the data signal onto the metal rail to transmit the data signal to the target slave module; it is understandable that after the host module receives the data signal, the first controller of the host module can analyze the received data signal, and determine from the analysis result which commodity's price is to be adjusted, and can determine the electronic tag responsible for displaying the commodity (i.e., the target slave module), and then modulate the received data signal through the power carrier technology, modulate the data signal onto two conductive metal strips of the metal rail, and then transmit it to the receiving end (i.e., the second power carrier module of the target slave module) through the conductive metal strips of the rail.

[0065] Step S20: the target slave module obtains the content to be displayed from the data signal, and displays the content to be displayed.

[0066] In a specific implementation, the target slave module calls the second power carrier module to demodulate the data signal; then the second controller of the target slave module obtains the content to be displayed from the data signal, and displays the content to be displayed in the display module of the target slave module.

[0067] It is understandable that the second power carrier module of the target slave module demodulates the data signal to achieve data signal transmission and communication. The second controller of the target slave module can analyze the data signal transmitted from the host module, determine from the analysis result that the price of the product needs to be adjusted, and obtain the updated price (i.e., the content to be displayed) through simple calculation, and finally display the updated price of the product through the ink screen.

[0068] The beneficial effect of the embodiment of the present application is that the host module receives indoor light energy through the solar panel and uses the capacitor to store electrical energy. When the content of the electronic tag of the slave module needs to be updated, the host module polls each slave module, and the host module sends the data information with the updated content to the target slave module through the power carrier communication technology, so that the target slave module obtains the content to be displayed from the data signal, and displays the content to be displayed through the display unit of the electronic tag, which can complete the real-time update of the electronic tag content of the slave module at the first time under the premise of low cost, improve the user experience, and help users save hardware costs and labor costs.

[0069] Embodiment 3

[0070] Further, based on the above-mentioned embodiment 1 and embodiment 2, the present application also provides an embodiment of a control method applied to an indoor base station. In this embodiment, Figure 4 As shown, the indoor base station 04 is configured to communicate with n host modules 01, and each host module 01 is configured to control m slave modules 02; there is a mapping management relationship between the slave module 02 and the host module 01, and the mapping management relationship will be stored in the database, wherein n and m are both positive integers;

[0071] It is understandable that the indoor base station 04 of the present application can act as a gateway, and one indoor base station 04 can manage multiple host modules 01. The indoor base station 04 can only communicate with the host module 01, and cannot communicate with the electronic tag of the slave module 02. The communication between the indoor base station 04 and the host module 01 is achieved by using wireless communication technology.

[0072] In the host module 01, the number of slave modules 02 installed on the rail is automatically determined to register multiple electronic tag slave information. Each slave module 02 entity corresponds to a logical sub-device in a host module 01 entity, and a host module 01 host can have multiple logical sub-devices at the same time. In a specific implementation, the operation of each entity slave module 02 is realized by operating the logical sub-device of the host module 01. Accordingly, the method of the embodiment of the present application with the indoor base station 04 as the execution subject includes:

[0073] Step A1: obtaining an update instruction for a target electronic tag input by a user;

[0074] Step A2: determining the target mapping management relationship corresponding to the slave module where the target electronic tag is located;

[0075] Step A3: determining the target host module corresponding to the target electronic tag based on the mapping management relationship;

[0076] Step A4: Send the update instruction to the target host module, so that the target host module transmits the data signal to the target electronic tag.

[0077] As with the second embodiment described above, the electronic tag of the slave module in the third embodiment of the present application is still described by taking the supermarket shelf deployed indoors as an example:

[0078] The update instruction can be sent by the system maintenance personnel of the mall through the indoor base station with an instruction signal for a certain product (i.e., the electronic tag of the slave module responsible for displaying the product);

[0079] Since the indoor base station is responsible for managing multiple host modules 01, each host module 01 is responsible for managing multiple slave modules 02;

[0080] Therefore, when the indoor base station receives the user's update instruction for the target electronic tag, it will search the database for the target mapping management relationship corresponding to the slave module where the target electronic tag is located, and confirm the target host module responsible for managing the target electronic tag from the database according to the target mapping management relationship;

[0081] Then the indoor base station sends the update instruction to the target host module, which then modulates the received update instruction through power carrier technology, modulates the update instruction onto the metal rail, transmits it to the target slave module through the conductive metal strip of the rail, and displays the content through the display unit of the electronic tag of the target slave module. It can complete the real-time update of the electronic tag content of a specified target slave module in the first time at a low cost, improves the user experience, and helps users save the hardware cost and labor cost of the electronic tag.

[0082] Furthermore, in other embodiments, the hardware components of the indoor base station 04 may include a processor, a memory, a communication interface, and a bus. The processor, the memory, and the communication interface communicate via the bus, or may communicate via other means such as wireless transmission. The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory. The memory stores program code, and the processor can call the computer program stored in the memory to execute Figure 5 The method shown.

[0083] It should be understood that in the embodiments of the present application, the processor may be a CPU, or may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0084] The memory may include a read-only memory and a random access memory, and provide instructions and data to the processor. The memory may also include a non-volatile random access memory. The memory may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link DRAM (SLDRAM), and direct memory bus random access memory (DR RAM).

[0085] In addition to the data bus, the bus may also include a power bus, a control bus, a status signal bus, etc.

[0086] In addition, an embodiment of the present application further provides a storage medium, which is a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in the above-mentioned method embodiments can be implemented.

[0087] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium can at least include: any entity or device that can carry the computer program code to the camera / terminal device, recording medium, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, RandomAccess Memory), electric carrier signal, telecommunication signal and software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

[0088] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0089] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0090] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0091] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents; and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should be included in the protection scope of the present application. The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents; and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A battery-free and maintenance-free electronic tag control system, characterized in that: The control system comprises a host module and a slave module fixed to the guide rail; the host module is configured to provide power to the electronic tag of the slave module based on the guide rail; The host module is used to send a data signal to the electronic tag of the slave module by means of the guide rail; The host module includes a solar panel and a capacitor; the solar panel is configured to receive indoor light energy, and the capacitor is configured to store electrical energy converted from the light energy.

2. The system according to claim 1, characterized in that The guide rail is a metal guide rail, the slave module includes an electronic tag, the electronic tag is equipped with a metal piece, the electronic tag is fixed to the metal guide rail through the metal piece, and the metal piece is in contact with the conductive metal strip of the metal guide rail; the host module sends a data signal to the electronic tag with the help of the metal guide rail.

3. The system according to claim 1 or 2, characterized in that: The host module includes a wireless transceiver module and a first power carrier module; the electronic tag includes a second controller and a second power carrier module; The wireless transceiver module is configured to receive data signals transmitted by the indoor base station; The first power carrier module is configured to modulate the data signal onto the guide rail for transmission; The second power carrier module is used to receive the data signal, and demodulate the data signal and transmit it to the second controller.

4. The system according to claim 3, characterized in that The host module also includes a first controller; The first controller is used to determine the target slave module corresponding to the data signal, and call the first power carrier module to modulate the data signal onto the guide rail for transmission to the electronic tag of the target slave module.

5. The system according to claim 4, characterized in that The electronic tag also includes a display module; The display module is used to display the to-be-displayed content related to the data signal.

6. The system according to claim 3, characterized in that The indoor base station is configured to communicate with n host modules, and each of the host modules is configured to control m slave modules, wherein n and m are positive integers.

7. A battery-free and maintenance-free electronic tag control method, characterized in that: The method is applied to the system according to any one of claims 1 to 6, wherein the control system comprises a host module and a slave module fixed to a guide rail, and the method comprises: The host module receives indoor light energy through a solar cell panel and converts the indoor light energy into electric energy, and transmits the electric energy and a data signal to the electronic tag of the slave module based on the guide rail.

8. The method according to claim 7, characterized in that The guide rail is a metal guide rail, the electronic tag is equipped with a metal piece, the electronic tag is fixed to the metal guide rail through the metal piece, and the metal piece is in contact with the conductive metal strip of the metal guide rail; The method further comprises: The host module receives the data signal, determines the target slave module to which the data signal points, and transmits the data signal to the target slave module based on the metal rail; The target slave module obtains the content to be displayed from the data signal, and displays the content to be displayed.

9. The method according to claim 7, characterized in that The host module includes a wireless transceiver module, a first controller and a first power carrier module; the electronic tag includes a second controller and a second power carrier module, and the method further includes: The host module receives a data signal, determines a target slave module to which the data signal points, and transmits the data signal to the target slave module based on the metal rail, including: The wireless transceiver module receives the data signal transmitted by the indoor base station; The first controller determines the target slave module to which the data signal points, and calls the first power carrier module to modulate the data signal onto the metal rail, so as to transmit the data signal to the target slave module; The target slave module acquires the content to be displayed from the data signal, and displays the content to be displayed, including: The target slave module calls the second power carrier module to demodulate the data signal; The second controller obtains the content to be displayed from the data signal, and displays the content to be displayed in the display module.

10. A battery-free and maintenance-free electronic tag control method, characterized in that: The method is applied to an indoor base station, the indoor base station is configured to communicate with n host modules, each of the host modules is configured to control m slave modules; The slave module and the host module have a mapping management relationship, and the method includes: Obtaining an update instruction for a target electronic tag input by a user; Determine the target mapping management relationship corresponding to the slave module where the target electronic tag is located; Determine the target host module corresponding to the target electronic tag based on the mapping management relationship; The update instruction is sent to the target host module, so that the target host module transmits the data signal to the target electronic tag.

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