WO2023092558A1 - 电子货架标签定位系统及方法、电子货架标签及导轨 - Google Patents
电子货架标签定位系统及方法、电子货架标签及导轨 Download PDFInfo
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- WO2023092558A1 WO2023092558A1 PCT/CN2021/134015 CN2021134015W WO2023092558A1 WO 2023092558 A1 WO2023092558 A1 WO 2023092558A1 CN 2021134015 W CN2021134015 W CN 2021134015W WO 2023092558 A1 WO2023092558 A1 WO 2023092558A1
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- Prior art keywords
- guide rail
- electronic shelf
- shelf label
- label
- product
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000004590 computer program Methods 0.000 claims description 31
- 230000006870 function Effects 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 5
- 230000003252 repetitive effect Effects 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 13
- 230000009286 beneficial effect Effects 0.000 description 2
- 229920001690 polydopamine Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 101150057198 ESL1 gene Proteins 0.000 description 1
- 101150022494 GLG1 gene Proteins 0.000 description 1
- 102100034223 Golgi apparatus protein 1 Human genes 0.000 description 1
- 101100065666 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) ESL2 gene Proteins 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000002360 preparation method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/08—Logistics, e.g. warehousing, loading or distribution; Inventory or stock management
- G06Q10/087—Inventory or stock management, e.g. order filling, procurement or balancing against orders
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/08—Fastening or securing by means not forming part of the material of the label itself
- G09F3/18—Casings, frames or enclosures for labels
- G09F3/20—Casings, frames or enclosures for labels for adjustable, removable, or interchangeable labels
- G09F3/204—Casings, frames or enclosures for labels for adjustable, removable, or interchangeable labels specially adapted to be attached to a shelf or the like
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/08—Fastening or securing by means not forming part of the material of the label itself
- G09F3/18—Casings, frames or enclosures for labels
- G09F3/20—Casings, frames or enclosures for labels for adjustable, removable, or interchangeable labels
- G09F3/208—Electronic labels, Labels integrating electronic displays
Definitions
- the invention relates to the technical field of electronic shelf labels, in particular to an electronic shelf label positioning system and method, an electronic shelf label and a guide rail.
- Existing positioning methods include triangulation.
- APs are deployed at three determined locations (x1, y1) (x2, y2) (x3, y3), and the electronic price tag receives wireless signals from the three APs of BS1, BS2, and BS3 at position E, and is estimated by the received signal strength RSSI
- the distance r1, r2 and r3 from the electronic price tag to BS1, BS2 and BS3 can be calculated by calculating the intersection area of the three circles in Figure 1 to obtain the position of point E.
- Triangulation has the following disadvantages: the wireless signal in the actual environment is uncertain, and the multipath and fading of the signal will cause a large change in RSSI, making it difficult to obtain an accurate distance value.
- the complexity of the wireless environment is aggravated by the shielding and attenuation of signals by shelves and customers, and the positioning accuracy is greatly affected.
- the accuracy can only be a few meters. Exceeding 80cm in the supermarket scene will lead to wrong aisle positions, and this accuracy cannot meet the needs of retailers.
- UWB positioning adopts the principle of TDOA (Time Difference Of Arrival, time difference of arrival).
- TDOA Time Difference Of Arrival, time difference of arrival
- the electronic price tag repeats and uninterruptedly broadcasts data frames to surrounding modules with nanosecond-level narrow pulses.
- Each positioning module uses a high-sensitivity receiver to measure the time when the data frame reaches the receiver antenna.
- Position the time difference of radio signal propagation between base stations, and obtain the distance difference between the electronic price tag and multiple positioning modules.
- the location tag is located on the hyperbola with the two modules as the focus. If there are more than three base stations, multiple hyperbolic equations can be established, and the intersection of these hyperbolic equations is the two-dimensional coordinate position of the price tag.
- the UWB system needs to be deployed separately. At the same time, the UWB signal attenuates faster, and the positioning base station needs to be intensively increased, which increases the equipment investment cost of the retailer.
- UWB has high requirements for deployment and implementation. Concrete walls or metals have strong attenuation on UWB signals, resulting in poor positioning accuracy or failure to locate.
- the UWB solution consumes a lot of power on the label side, which cannot meet the requirements of retailers for the 5-10-year service life of electronic shelf labels.
- An embodiment of the present invention provides an electronic shelf label, including: a main control SoC, a card reader IC, a screen, and a power supply device;
- the main control SoC is used for: controlling the screen display and completing the communication function with the AP;
- the card reader IC is used for: reading wireless tags
- the power supply device is used for: supplying power to the electronic shelf label.
- the embodiment of the present invention also provides a guide rail, which is used to install the above-mentioned electronic shelf label, including: a guide rail identification area and a label area;
- each tag has a unique and non-repetitive ID number
- An identification device is installed in the identification area of the guide rail, and the identification device includes a guide rail ID, and the guide rail ID is formed by arranging and summarizing the ID numbers of the wireless tags in sequence.
- the embodiment of the present invention also provides an electronic shelf label positioning system, including: the above-mentioned electronic shelf label, the above-mentioned guide rail, PDA and background server; wherein the guide rail is installed on the commodity shelf;
- the PDA is used to: scan the product shelf ID and the guide rail ID to form a binding relationship between the shelf and the guide rail ID; scan the electronic shelf label ID and the product ID to form the binding relationship between the electronic shelf label and the product; the binding relationship is transmitted to the background server;
- the electronic shelf label is used to: read the wireless tag ID on the guide rail and send it to the background server;
- the background server is used to: push the commodity and price information to be displayed on the electronic shelf label; determine the guide rail ID based on the wireless tag ID, determine the shelf information based on the binding relationship between the shelf and the guide rail ID and the guide rail ID, and obtain the corresponding electronic shelf label based on the shelf information Location.
- the embodiment of the present invention also provides an electronic shelf label positioning method, including:
- the PDA scans the product shelf ID and guide rail ID to form the binding relationship between the shelf and the guide rail ID; scans the electronic shelf label ID and product ID to form the binding relationship between the electronic shelf label and the product; the binding relationship is sent to the background server;
- the electronic shelf label reads the wireless tag ID on the guide rail and sends it to the background server;
- the background server pushes the product and price information to be displayed on the electronic shelf label; determines the guide rail ID based on the wireless tag ID, determines the shelf information based on the binding relationship between the shelf and the guide rail ID and the guide rail ID, and obtains the corresponding electronic shelf label position based on the shelf information;
- the electronic shelf label is the above-mentioned electronic shelf label
- the guide rail is the above-mentioned guide rail; the guide rail is installed on the commodity shelf.
- An embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored on the memory and operable on the processor, and the processor implements the above-mentioned electronic shelf label positioning method when executing the computer program.
- An embodiment of the present invention also provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the above-mentioned electronic shelf label positioning method is realized.
- An embodiment of the present invention also provides a computer program product, the computer program product includes a computer program, and when the computer program is executed by a processor, the above electronic shelf label positioning method is realized.
- an electronic shelf label positioning system including electronic shelf labels, guide rails, PDAs and background servers, and the electronic shelf labels include main control SoC , card reader IC, screen and power supply equipment; the main control SoC is used to: control the screen display and complete the communication function with AP; the card reader IC is used to: read wireless tags; the power supply equipment is used to: supply power to electronic shelf labels.
- the guide rail includes: the guide rail identification area and the label area; among them, the label area is equipped with multiple wireless tags, and each label has a unique and unique ID number; the guide rail identification area is equipped with an identification device, and the identification device includes guide rail ID, guide rail ID It is formed by arranging and summarizing the ID numbers of wireless tags in sequence.
- Fig. 1 is a schematic structural diagram of an electronic shelf label in an embodiment of the present invention
- Fig. 2 is the schematic structural view of guide rail structure in the embodiment of the present invention.
- FIG. 3 is a schematic structural diagram of an electronic shelf label positioning system in an embodiment of the present invention.
- Fig. 4 is the schematic structural view of the guide rail structure prepared in the embodiment of the present invention.
- Fig. 5 is the schematic diagram of shelf in the embodiment of the present invention.
- FIG. 6 is a schematic diagram of the binding of the shelf ID and the wireless tag in the embodiment of the present invention.
- Figure 7 is a schematic diagram of the binding of shelf IDs, wireless tags, commodities and electronic shelf labels in an embodiment of the present invention
- Fig. 8 is a product display diagram in the embodiment of the present invention.
- Fig. 9 is a flow chart 1 of an electronic shelf label positioning method in an embodiment of the present invention.
- FIG. 10 is the second flow chart of the electronic shelf label positioning method in the embodiment of the present invention.
- the present invention proposes an electronic shelf label.
- the structure of the electronic shelf label is shown in Figure 1, including: a main control SoC, a card reader IC, a screen and a power supply device (ie, a battery);
- the main control SoC is used for: controlling the screen display and completing the communication function with the AP;
- the card reader IC is used for: reading wireless tags
- the power supply device is used for: supplying power to the electronic shelf label.
- AP Access Point
- SoC System on Chip
- SoC System on Chip
- a system on a chip is an integrated circuit with a dedicated target, which contains a complete system and all the content of embedded software.
- FIG. 1 it further includes: a displacement sensor for detecting whether the electronic shelf label moves.
- the electronic shelf label can judge whether there is movement through the displacement sensor, and it can be set to read the tag information (wireless tag information) after the movement occurs and comes back to rest, thereby reducing power consumption.
- the main control SoC is further configured to: control the card reader IC based on the displacement signal detected by the displacement sensor.
- the present invention proposes a guide rail, the structure of which is shown in Figure 2, for installing the above-mentioned electronic shelf label, including: a guide rail identification area and a label area;
- each tag has a unique and non-repetitive ID number
- An identification device is installed in the identification area of the guide rail, and the identification device includes a guide rail ID, and the guide rail ID is formed by arranging and summarizing the ID numbers of the wireless tags in sequence.
- the identification device adopts a guide rail label; wherein, the guide rail ID is written in the guide rail label.
- the identity recognition device adopts a two-dimensional code; wherein, the two-dimensional code is generated by the guide rail ID.
- the guide rail label and multiple wireless tags are fixed on the guide rail by pasting or side inserting.
- the guide rail further includes scales for assisting the alignment of commodities. That is, it can assist the clerk to align the products.
- the present invention also proposes an electronic shelf label positioning system, as shown in Figure 3, comprising: the above-mentioned electronic shelf label, the above-mentioned guide rail, PDA and background server; wherein the guide rail is installed on the commodity shelf.
- the track position can be obtained by binding the track ID and the shelf ID, and the binding relationship is stored in the background server.
- the price tag is installed on the guide rail, and the ID of the wireless tag on the guide rail is read and uploaded to the server. By comparing the ID number of the wireless tag, the position of the guide rail and the shelf is obtained.
- the PDA is used to: scan the product shelf ID and the guide rail ID to form a binding relationship between the shelf and the guide rail ID; scan the electronic shelf label ID and the product ID to form the binding relationship between the electronic shelf label and the product; sent to the background server;
- the electronic shelf label is used to: read the wireless tag ID on the guide rail and send it to the background server;
- the background server is used to: push the commodity and price information to be displayed on the electronic shelf label; determine the guide rail ID based on the wireless tag ID, determine the shelf information based on the binding relationship between the shelf and the guide rail ID and the guide rail ID, and obtain the corresponding electronic shelf label based on the shelf information Location.
- PDA Personal Digital Assistant
- Guide rail preparation Paste or side insert the wireless tags to the guide rail label area in sequence, read the wireless tag IDs sequentially through the PDA, generate guide rail IDs after summarization, and write the guide rail IDs into the guide rail labels.
- the summarized guide rail ID can also generate a QR code and paste it or insert it sideways and fix it to the guide rail identification area.
- the binding relationship between the rail ID and each wireless ID is generated.
- the size of each wireless tag is 3cm-5cm.
- R101 in Figure 4 The content of R101 in Figure 4 is T101T102T103T104T105T106T107T108, read or scan the code once to get all the tag IDs arranged in order on the guide rail.
- Guide rail binding Install the prepared guide rail on the shelf, PDA first scans the shelf ID, and then scans the ID of each layer of guide rail in turn to form a binding relationship between the shelf and guide rail ID. From the above, the binding relationship between the guide rail ID and each wireless tag can be known, and thus the binding relationship between the shelf ID and the wireless tag can be established, as shown in Table 1 and Figure 6.
- the background server starts positioning, and the electronic shelf label reads the wireless label of the guide rail and reports it.
- the server obtains the accurate guide rail ID by comparing the binding relationship between the guide rail ID and the wireless tag ID, and then obtains the shelf information through the binding relationship between the guide rail ID and the shelf. In this way, the location information of the corresponding commodity can be accurately obtained.
- the fifth electronic shelf label ESL5 in Figure 7 reads the label ID T204 on the guide rail.
- the lookup table 1 it can be accurately known that the shelf label is located in the fourth label area of the second layer guide rail of the S001 shelf.
- the background server is further configured to: generate a product display map based on the binding relationship between the electronic shelf label and the product and the position of the electronic shelf label, as shown in FIG. 8 .
- Fig. 9 is a flow chart 1 of an electronic shelf label positioning method in an embodiment of the present invention. As shown in Fig. 9, the method includes:
- Step 901 the PDA scans the commodity shelf ID and the rail ID to form a binding relationship between the shelf and the rail ID; scans the electronic shelf label ID and the commodity ID to form a binding relationship between the electronic shelf label and the commodity; the binding relationship is sent to the background server;
- Step 902 the electronic shelf label reads the wireless tag ID on the guide rail and sends it to the background server;
- Step 903 The background server pushes the product and price information to be displayed on the electronic shelf label; determines the guide rail ID based on the wireless tag ID, determines the shelf information based on the binding relationship between the shelf and the guide rail ID and the guide rail ID, and obtains the corresponding electronic shelf label based on the shelf information Location;
- the electronic shelf label is the above-mentioned electronic shelf label
- the guide rail is the above-mentioned guide rail; the guide rail is installed on the commodity shelf.
- Step 1001 The background server generates a product display map based on the binding relationship between the electronic shelf label and the product, and the position of the electronic shelf label.
- An embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored on the memory and operable on the processor, and the processor implements the above-mentioned electronic shelf label positioning method when executing the computer program.
- An embodiment of the present invention also provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the above-mentioned electronic shelf label positioning method is implemented.
- An embodiment of the present invention also provides a computer program product, where the computer program product includes a computer program, and when the computer program is executed by a processor, the above electronic shelf label positioning method is realized.
- an electronic shelf label positioning system including electronic shelf labels, guide rails, PDAs and background servers, and the electronic shelf labels include main control SoC , card reader IC, screen and power supply equipment; the main control SoC is used to: control the screen display and complete the communication function with AP; the card reader IC is used to: read wireless tags; the power supply equipment is used to: supply power to electronic shelf labels.
- the guide rail includes: a guide rail identification area and a label area; among them, multiple wireless tags are installed in the label area, and each label has a unique and non-repeating ID number; an identification device is installed in the guide rail identification area, and the identification device includes guide rail ID, guide rail ID It is formed by arranging and summarizing the ID numbers of wireless tags in sequence.
- the present invention obtains following beneficial effect:
- the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
- computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
- These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions
- the device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.
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Abstract
Description
位置 | 导轨ID | 无线标签ID |
S001货架第四层 | R104 | T401T402T403T404T405T406T407T408 |
S001货架第三层 | R103 | T301T302T303T304T305T306T307T308 |
S001货架第二层 | R102 | T201T202T203T204T205T206T207T208 |
S001货架第一层 | R101 | T101T102T103T104T105T106T107T108 |
电子货架标签 | 商品 |
ESL1 | 商品A |
ESL2 | 商品B |
ESL3 | 商品C |
ESL4 | 商品D |
ESL5 | 商品E |
ESL6 | 商品F |
ESL7 | 商品G |
ESL8 | 商品H |
ESL9 | 商品I |
Claims (16)
- 一种电子货架标签,其特征在于,包括:主控SoC、读卡器IC、屏幕和供电设备;所述主控SoC用于:控制屏幕显示并完成和AP通信功能;所述读卡器IC用于:读取无线标签;所述供电设备用于:给电子货架标签供电。
- 如权利要求1所述的电子货架标签,其特征在于,还包括:位移传感器,用于检测电子货架标签是否有移动。
- 如权利要求2所述的电子货架标签,其特征在于,所述主控SoC还用于:基于位移传感器检测到的位移信号控制所述读卡器IC。
- 如权利要求1所述的电子货架标签,其特征在于,所述供电设备为电池。
- 一种导轨,其特征在于,用于安装权利要求1至4任一项所述的电子货架标签,包括:导轨标识区和标签区;其中,标签区安装有多个无线标签,每个标签有唯一不重复的ID号;导轨标识区安装有身份识别装置,身份识别装置包括导轨ID,导轨ID由无线标签ID号依顺序排列汇总而成。
- 如权利要求5所述的导轨,其特征在于,所述身份识别装置采用导轨标签;其中,导轨标签内写入导轨ID。
- 如权利要求5所述的导轨,其特征在于,所述身份识别装置采用二维码;其中,二维码由导轨ID生成。
- 如权利要求5所述的导轨,其特征在于,导轨标签和多个无线标签通过粘贴或者侧插方式固定在导轨上。
- 如权利要求5所述的导轨,其特征在于,所述导轨上还包括刻度,用于辅助商品对齐。
- 一种电子货架标签定位系统,其特征在于,包括:权利要求1至4任一项所述的电子货架标签、权利要求5至9任一项所述的导轨、PDA和后台服务器;其中导轨安装于商品货架上;所述PDA用于:扫描商品货架ID和导轨ID,形成货架和导轨ID的绑定关系;扫描电子货架标签ID和商品ID,形成电子货架标签和商品的绑定关系;绑定关系传送至后台服务器;电子货架标签用于:读取导轨上的无线标签ID并传送至后台服务器;后台服务器用于:推送商品及价格信息显示在电子货架标签上;基于无线标签ID确定导轨ID,基于货架和导轨ID的绑定关系、导轨ID,确定货架信息,基于货架信息得到对应电子货架标签位置。
- 如权利要求10所述的电子货架标签定位系统,其特征在于,所述后台服务器还用于:基于电子货架标签和商品的绑定关系、电子货架标签位置,生成商品陈列图。
- 一种电子货架标签定位方法,其特征在于,包括:PDA扫描商品货架ID和导轨ID,形成货架和导轨ID的绑定关系;扫描电子货架标签ID和商品ID,形成电子货架标签和商品的绑定关系;绑定关系传送至后台服务器;电子货架标签读取导轨上的无线标签ID并传送至后台服务器;后台服务器推送商品及价格信息显示在电子货架标签上;基于无线标签ID确定导轨ID,基于货架和导轨ID的绑定关系、导轨ID,确定货架信息,基于货架信息得到对应电子货架标签位置;其中,电子货架标签为权利要求1至4任一项所述的电子货架标签,导轨为权利要求5至9任一项所述的导轨;导轨安装于商品货架上。
- 如权利要求12所述的电子货架标签定位方法,其特征在于,还包括:后台服务器基于电子货架标签和商品的绑定关系、电子货架标签位置,生成商品陈列图。
- 一种计算机设备,包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序,其特征在于,所述处理器执行所述计算机程序时实现权利要求12至13任一所述电子货架标签定位方法。
- 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质存储有计算机程序,所述计算机程序被处理器执行时实现权利要求12至13任一所述电子货架标签定位方法。
- 一种计算机程序产品,其特征在于,所述计算机程序产品包括计算机程序,所述计算机程序被处理器执行时实现权利要求12至13任一所述电子货架标签定位方法。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2023507723A JP2024500197A (ja) | 2021-11-29 | 2021-11-29 | 電子棚札の位置決めシステム及び方法、電子棚札、並びに、ガイドレール |
CA3237548A CA3237548A1 (en) | 2021-11-29 | 2021-11-29 | Electronic shelf label positioning system and method, electronic shelf label and guide rail |
AU2021470577A AU2021470577A1 (en) | 2021-11-29 | 2021-11-29 | Electronic shelf label positioning system and method, electronic shelf label and guide rail |
EP21958588.2A EP4224367A4 (en) | 2021-11-29 | 2021-11-29 | SYSTEM AND METHOD FOR POSITIONING ELECTRONIC SHELF LABELS AND ELECTRONIC SHELF LABEL AND GUIDE RAIL |
PCT/CN2021/134015 WO2023092558A1 (zh) | 2021-11-29 | 2021-11-29 | 电子货架标签定位系统及方法、电子货架标签及导轨 |
US18/314,603 US11961423B2 (en) | 2021-11-29 | 2023-05-09 | Electronic shelf label positioning system and method, electronic shelf label and guide rail |
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EP4224367A4 (en) | 2024-02-21 |
EP4224367A1 (en) | 2023-08-09 |
US20230274667A1 (en) | 2023-08-31 |
US11961423B2 (en) | 2024-04-16 |
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