WO2019006919A1 - 无人售货柜的商品扫描方法及其系统 - Google Patents

无人售货柜的商品扫描方法及其系统 Download PDF

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Publication number
WO2019006919A1
WO2019006919A1 PCT/CN2017/107883 CN2017107883W WO2019006919A1 WO 2019006919 A1 WO2019006919 A1 WO 2019006919A1 CN 2017107883 W CN2017107883 W CN 2017107883W WO 2019006919 A1 WO2019006919 A1 WO 2019006919A1
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Prior art keywords
rfid reader
information
tag
product
predetermined
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PCT/CN2017/107883
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English (en)
French (fr)
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李文华
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深圳正品创想科技有限公司
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Publication of WO2019006919A1 publication Critical patent/WO2019006919A1/zh

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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • G06K17/0022Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
    • G06K17/0029Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07FCOIN-FREED OR LIKE APPARATUS
    • G07F9/00Details other than those peculiar to special kinds or types of apparatus
    • G07F9/002Vending machines being part of a centrally controlled network of vending machines

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  • the present application relates to the field of RFID technology, and in particular, to a commodity scanning method and system for an unmanned vending cabinet.
  • a vending machine is a machine that can automatically pay for goods according to the input of coins. It has the advantage of being free from time and place, saving capacity, facilitating transactions, etc., and has begun to be widely used.
  • Each vending cabinet can be viewed as a separate cargo storage bin.
  • the vending cabinet can sell the corresponding goods according to the user's instructions.
  • the goods to be sold need to be recorded in order to provide the data to the back-end applications, such as statistics on the sales of the goods, whether the goods are in conformity with the inventory, and whether the goods sold are correct. Whether the vending cabinet can run well, etc.
  • the vending cabinet in the sales process, the vending cabinet usually uses mechanical actions to drop the goods, and cannot automatically count the currently sold goods, and cannot be used for each sale. Carrying out inventory or statistics is not convenient for timely reflecting the user's shopping situation, and has a certain impact on the reliability of the vending machine operation.
  • the present invention provides a method for scanning a product of an unmanned vending cabinet and a system thereof, and aims to solve the problem that the inventory cannot be counted for each shopping situation in the prior art, and the reliability of the vending machine is not good.
  • An embodiment of the present application provides an item scanning method for an unmanned vending cabinet.
  • the method comprises: respectively providing a first RFID reader on a cargo storage rack of an unmanned vending cabinet and a second RFID reader at a take-out opening of the unmanned vending cabinet; acquiring, by the first RFID reader, leaving the The first item information of the goods of the goods storage rack;
  • the commodity is provided with a passive RFID tag;
  • the passive RFID tag stores at least one tag information, and the tag information corresponds to commodity information of the commodity;
  • the first RFID reader and the second RFID readers are passive RFID readers.
  • the obtaining, by the first RFID reader, the first product information of the product leaving the cargo storage rack specifically includes:
  • the product information corresponding to the tag information is acquired as the first product information based on the tag information.
  • the obtaining, by the second RFID reader, the second commodity information of the product in the pickup port by using the second RFID reader specifically includes:
  • the item information corresponding to the tag information is acquired as the second item information based on the tag information.
  • the method further includes: detecting whether there is a user purchase instruction; starting the first RFID reader when there is a user purchase instruction; and within a predetermined second time interval, The vending machine shipment failure is determined when the first RFID reader does not detect the tag information.
  • the system includes: a first RFID reader disposed on a cargo storage rack of the unmanned vending cabinet; a second RFID reader disposed at the access opening of the unattended kiosk, one or more memories, and one or more a processor; the memory storing executable computer program instructions, invoked by the one or more processors to perform: obtaining, by the first RFID reader, first commodity information of an item leaving the cargo storage rack Obtaining, by the second RFID reader, second commodity information of the commodity in the retrieval port during a predetermined first time interval; comparing a degree of matching between the first commodity information and the second commodity information; When the matching degree is lower than the predetermined matching threshold, it is determined that the commodity information acquisition error is obtained.
  • the commodity is provided with a passive RFID tag;
  • the passive RFID tag stores at least one tag information, and the tag information corresponds to commodity information of the commodity;
  • the first RFID reader and the second RFID readers are passive RFID readers.
  • the processor when performing the first commodity information of the commodity leaving the cargo storage rack by using the first RFID reader, the processor is specifically configured to:
  • the product information corresponding to the tag information is acquired as the first product information based on the tag information.
  • the processor is specifically configured to: be used by the second RFID reader Transmitting a carrier signal to the pickup port at a predetermined detection period; activating the passive RFID tag entering the pickup port through the carrier signal; receiving the radio frequency signal returned by the passive RFID tag, and recording the tag in the radio frequency signal Information and the signal strength of the radio frequency signal; determining whether the signal strength change of the same radio frequency signal exceeds a predetermined threshold between adjacent periods; if so, determining that the commodity of the fetching port moves; if not, determining the fetching port
  • the product is in a stable state; after the predetermined state is maintained for a predetermined period of time, the product information corresponding to the tag information is acquired as the second product information based on the tag information.
  • the processor is further configured to: detect whether there is a user purchase instruction; initiate the first RFID reader when there is a user purchase instruction; and during the predetermined second time interval, the first RFID reading When the tag information is not detected, the vending machine shipment failure is determined.
  • Another aspect of the present application provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer Actuating the computer based on the first RFID reader disposed on the cargo storage rack of the unmanned vending cabinet and the second RFID reader disposed at the access opening of the unmanned vending cabinet Product scanning method.
  • the merchandise scanning method and system for the unmanned vending cabinet provided by the embodiment of the present application scans each sales situation of the goods, and can timely count the sales of the goods to ensure the reliable operation of the vending machine.
  • the double scanning method is used, which can further ensure the accuracy of the scanning information, and accurately obtain the price, quantity and other information of each product sale.
  • FIG. 1 is a flow chart of a method for scanning a product of an unattended vault provided by an embodiment of the present application
  • FIG. 2 is a flow chart of a method for scanning a product of an unmanned vending machine according to another embodiment of the present application
  • FIG. 3 is a flowchart of a method for controlling a first RFID reader in a commodity scanning method according to another embodiment of the present application
  • FIG. 4 is a schematic diagram showing the hardware structure of a commodity scanning system of an unattended cabinet provided by an embodiment of the present application.
  • each sale of goods usually consists of two action steps.
  • the vending machine pushes the goods out of the shelf after receiving the user's shopping order and confirming that the payment is completed.
  • the goods that are ejected from the shelves are then transferred to the access opening of the vending container by gravity or other suitable mechanical transport mechanism.
  • the cargo may specifically be any suitable commodity, such as a beverage, a bagged snack, a candy, and the like.
  • the shelf form for storage may also be in any suitable form, such as a compartmentalized compartment, a plurality of spaced compartments, and the like.
  • the commodity scanning method provided by the embodiment of the present application can be applied to scan and record each of the above-mentioned goods sales processes to ensure reliable and stable operation of the vending machine.
  • FIG. 1 is a method for scanning a commodity of an unattended cabinet according to an embodiment of the present application. As shown in FIG. 1, corresponding to two different steps in the above-mentioned goods sales process, the method may include:
  • a first RFID reader is disposed on the cargo storage rack of the unmanned vending cabinet, and a second RFID reader is disposed at the unloading port of the unmanned vending cabinet.
  • scanning for goods is implemented based on a radio frequency technology such as RFID.
  • the RFID reader is a device capable of acquiring information stored in an RFID tag, and specifically, any suitable form of RFID reader available to perform such a function.
  • an RFID reader has a read range of a specific size, by its antenna or Other similar components are formed. When the electronic tag is moved and enters the reading range, it can be read by the RFID reader.
  • the first RFID reader is disposed on the cargo storage rack, and corresponds to the first step in the sales process of the goods, and is used for detecting the goods detached from the cargo storage rack and obtaining the corresponding commodity information.
  • the second RFID reader corresponds to the second step in the sales process for detecting product information at the access opening. As described above, when the merchandise is detached from the cargo storage rack, it takes a certain time to enter between the take-out ports. When the goods (goods) enter the access opening, the second RFID reader is further activated to obtain the commodity information of the goods in the pickup.
  • the predetermined first time interval is an adjustable parameter for reflecting the time. By the predetermined first time interval, it can be ensured that the first cargo reader and the second RFID reader belong to the same goods sales process.
  • the predetermined first time interval may be determined by the structure of the particular application vending machine and is an empirical value. For example 1 second, 5 seconds or longer / shorter intervals.
  • the degree of matching is used to measure the inconsistency between the two.
  • the matching degree is a variable for quantizing the difference between the first item information and the second item information, which may be a percentage obtained by multiplying each type of information in the item information by a corresponding weight, and adding . For example, it can be calculated based on the price, quantity, brand, volume, and the like in the product information.
  • the matching threshold is also an empirical data, and some tolerances may be reserved by setting a matching threshold, allowing some differences between the first item information and the second item information, such as a change in the quantity of certain items or between the old and new versions of the goods. The change.
  • the matching threshold may also be set to 100%, and there is no difference between the first item information and the second item information.
  • the double scanning method is adopted, and mutual verification is performed through two steps in the sales process of the goods, so that the accuracy of the scanned information can be ensured, and the price, quantity and other information of each product sale can be accurately obtained.
  • the RFID technology applied in the embodiments of the present application can be divided into a plurality of different types.
  • the lowest cost, most widely used passive RFID tag and a passive RFID reader coupled therewith can be used.
  • the passive RFID tag can store specific tag information, such as a certain product code or other specific code. Passive RFID tags can be attached to the item, for example by pasting.
  • a passive RFID reader can determine a particular item by reading the item in the passive RFID tag. That is, there is a unique correspondence between the product and the RFID tag. As described above, the detection of the commodity can be further realized by utilizing the characteristics of the RFID reader.
  • FIG. 2 is a method for scanning a commodity according to another embodiment of the present application. This method is implemented by giving passive RFID tags. As shown in FIG. 2, the method specifically includes:
  • a continuous carrier signal is transmitted by the first RFID reader in a predetermined area.
  • the predetermined area may specifically be a partial path through which the merchandise must pass when leaving the shelf. For example, the merchandise outlet of the shelf.
  • the specific predetermined area may be set or determined by the antenna or placement position of the first RFID reader.
  • the passive RFID tag that is fixed or adhered to the merchandise enters the predetermined area and is activated by the carrier signal.
  • the relationship between a passive RFID tag and a reader is a many-to-one relationship.
  • Each RFID tag cannot communicate with each other. Therefore, if a plurality of passive RFID tags enter the predetermined area at the same time, they are all activated and return information to the RFID reader at a short time interval or even at the same time.
  • the RFID reader is unable to process information that is returned simultaneously or nearly simultaneously. If such a situation occurs frequently, the RFID tag information is lost, thereby affecting the detection or judgment of the product information.
  • step 203 the passive tag returns the tag information in a random time interval to avoid such a situation as much as possible. Since each passive RFID tag returns information at random times. Therefore, the probability of multiple tag information returning at the same time is greatly reduced, ensuring the detection accuracy of the RFID reader.
  • the information can be passed to the background or other cloud server.
  • the first product information is determined according to the correspondence between the tag information and the product information.
  • the first item information may specifically be a sum of a plurality of types of item information and item information related to the item.
  • the first product information can comprehensively reflect all the products purchased in a certain purchase behavior.
  • the first RFID reader needs to be continuously maintained in operation. Therefore, the power consumption of the RFID reader can be reduced by controlling the startup time. It is only started part of the time to save power.
  • FIG. 3 is a flowchart of a method for determining whether to activate a first RFID reader according to an embodiment of the present application. As shown in FIG. 3, the method includes:
  • Detect whether there is a user purchase instruction During normal time, when the vending machine is in normal operation, the first RFID reader does not need to be activated and detected. Only when a user purchase order occurs indicates that the user may begin to enter the shopping process.
  • the first RFID reader is activated when there is a user purchase instruction. After entering the shopping process, it is necessary to start the first RFID reader in time to ensure that the detachment of the product can be smoothly detected.
  • the control terminal in the background can be notified through the wireless network or other suitable manner to timely handle such a failure.
  • step 300 may further include:
  • the carrier signal is transmitted by the second RFID reader to the pickup port at a predetermined detection period.
  • the working mode of the second RFID reader is periodic operation. This is based on the characteristics of the access opening being a fixed container. Because the goods usually stay in the pickup for a longer period of time (relative to the specific path). Therefore, the way of working in a periodic manner is not in the period of stopping work, resulting in the occurrence of missed detection without detecting the RFID tag of certain commodities.
  • the carrier signal also activates the passive RFID tag, thereby enabling the reader to read the tag information of the RFID tag.
  • the second RFID reader may also cause the label to simultaneously activate the response due to the presence of a plurality of labels, causing a problem of label collision.
  • the signal strength of the RF signal is related to the location of the commodity.
  • the signal strength of the RF signal has a specific fixed value at each location when the product is in a particular location, taking into account the reflection of the entire access port and, in other cases. Therefore, the RF signal strength returned by the RFID tag can also be used as the location information of the commodity.
  • step 2081 Determine whether the signal strength of the same radio frequency signal changes between adjacent periods A predetermined threshold is drawn. If yes, go to step 2081; if no, go to step 2082.
  • the second RFID reader operates with a certain period of time.
  • the collection of tag information is performed once per cycle. In this way, it is determined whether the accurate data of the item in the take-up port has moved.
  • the stable state of the commodity indicates that the current commodity does not move in the access opening, which is a relatively stable state.
  • the product information corresponding to the tag information is acquired as the second product information according to the tag information.
  • the second product information can be determined and used as a comparison with the first product information.
  • the RFID reader can read the tag information multiple times, so that all the product information can be read, and the RFID reader does not obtain the product information due to the collision of the tag or the simultaneous response. Causes a wrong judgment.
  • the embodiment of the present application further provides an unmanned vending system.
  • the unmanned vending system can include:
  • a first RFID reader 401 disposed on the cargo storage rack of the unmanned vending cabinet and a second RFID reader 402 disposed at the access opening of the unattended kiosk, one or more memories 403, and one or more processes 404.
  • a memory 403 and a processor 404 are taken as an example.
  • the memory 403 may specifically include: a high speed random access memory, and may further include a nonvolatile memory such as at least one magnetic disk storage device, a flash memory device, or other nonvolatile solid state storage device.
  • memory 403 can optionally include memory remotely located relative to processor 404, which can be connected to the video preview device over a network. Examples of the above networks include, but are not limited to, the Internet, an intranet, a local area network, Mobile communication networks and combinations thereof.
  • the unmanned vending system can also add or save some devices according to actual needs without being limited to the above devices, for example, adding a microphone for implementing voice control, a wireless communication module, and the like.
  • the memory stores executable computer program instructions that are invoked by the one or more processors to perform the method steps of: obtaining, by the first RFID reader, first commodity information of an item leaving the cargo storage rack Obtaining, by the second RFID reader, second commodity information of the commodity in the retrieval port during a predetermined first time interval; comparing a degree of matching between the first commodity information and the second commodity information; When the matching degree is lower than the predetermined matching threshold, it is determined that the commodity information acquisition error is obtained.
  • the above method steps may also be divided into one or more functional units having corresponding functions according to actual conditions, and implemented by a combination of software, hardware or software and hardware by a processor and/or a memory.
  • a passive RFID tag may be specifically selected as a tag that is attached to the item for identifying and identifying the item. At least one tag information is stored in the passive RFID tag, and the tag information corresponds to product information of the product.
  • the first RFID reader and the second RFID reader are both passive RFID readers.
  • the processor may further control the first RFID reader and the second RFID reader for detection characteristics in different steps and possible detection error situations:
  • the processor invokes a computer executable program within the memory to implement one or more functional units to perform the following steps:
  • the processor invokes a computer executable program within the memory to implement one or more functional units to perform the steps of: predetermined detection by the second RFID reader to the access port Periodically transmitting a carrier signal; activating the passive RFID tag entering the pickup port through the carrier signal; receiving the radio frequency signal returned by the passive RFID tag, and recording the tag information in the radio frequency signal and the signal strength of the radio frequency signal; Whether the change in the signal strength of the same radio frequency signal exceeds a predetermined threshold between adjacent periods; if so, it is determined that the commodity of the take-up port moves; if not, it is determined that the commodity of the take-up port is in a stable state; After the state is maintained for a predetermined period of time, the item information corresponding to the tag information is acquired as the second item information based on the tag information.
  • the startup time of the first RFID reader can be controlled by the processor to enable the first RFID reader to operate in need. Within the time period.
  • the processor can be configured to detect whether there is a user purchase instruction.
  • the processor activates the first RFID reader when there is a user purchase instruction; and determines that the vending machine is shipped when the first RFID reader does not detect the tag information within a predetermined second time interval malfunction.
  • the embodiment of the present application further provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer Actuating the computer based on the first RFID reader disposed on the cargo storage rack of the unmanned vending cabinet and the second RFID reader disposed at the access opening of the unmanned vending cabinet Product scanning method method.
  • the above-mentioned unmanned vending system can perform the method provided by the embodiment of the present application, and has the corresponding functional modules and beneficial effects of the execution method.
  • the method provided by the embodiments of the present application can perform the method provided by the embodiment of the present application, and has the corresponding functional modules and beneficial effects of the execution method.
  • the computer software can be stored in a computer readable storage medium, which, when executed, can include the flow of an embodiment of the methods described above.
  • the storage medium may be a magnetic disk, an optical disk, a read-only storage memory, or a random storage memory.

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Abstract

一种无人售货柜的商品扫描方法及其系统。该方法包括:分别在无人售货柜的货物存放架上设置第一RFID阅读器以及在无人售货柜的取物口处设置第二RFID阅读器(100);通过第一RFID阅读器,获取离开货物存放架的商品的第一商品信息(200);在预定的第一时间间隔内,通过第二RFID阅读器,获取取物口内的商品的第二商品信息(300);比较第一商品信息和第二商品信息的匹配程度(400);在匹配程度低于预定的匹配阈值时,确定为商品信息获取错误(500)。对每次的货物销售情况都进行扫描,能够及时的进行商品销售情况的统计,确保自动售货机的可靠运行。另一方面,能够进一步的确保扫描信息的准确性,准确的获取每次商品销售的价格、数量以及其他的信息。

Description

无人售货柜的商品扫描方法及其系统 技术领域
本申请涉及RFID技术领域,特别是涉及一种无人售货柜的商品扫描方法及其系统。
背景技术
自动售货柜是一种能够根据投入钱币自动付货的机器。其具有不受时间、地点的限制,能够节省能力,方便交易等的优势,开始被广泛的应用。
每个自动售货柜都可以看做一个独立货物存储仓。自动售货柜可以根据用户指令,销售相应的货品。在自动售货柜销售商品的过程中,需要对销售的货品进行记录,以便于将这些数据提供给后端的应用,例如进行货物销售的统计,与库存是否相符,销售的货物是否正确。自动售货柜是否能够良好的运行等。
在实现本申请过程中,发明人发现相关技术存在以下问题:自动售货柜在销售过程中,通常是使用机械动作使商品掉落,不能自动的统计当前销售的货物,无法对每次的销售情况进行盘点或者统计,不便于及时的反映用户的购物情况,对于自动售货机运行的可靠性有一定的影响。
发明内容
本申请提供一种无人售货柜的商品扫描方法及其系统,旨在解决现有技术中无法对每次购物情况进行盘点,自动售货机可靠性不佳的问题。
本申请实施例一方面提供了一种无人售货柜的商品扫描方法。该方法包括:分别在无人售货柜的货物存放架上设置第一RFID阅读器以及在无人售货柜的取物口处设置第二RFID阅读器;通过第一RFID阅读器,获取离开所述货物存放架的商品的第一商品信息;
在预定的第一时间间隔内,通过第二RFID阅读器,获取所述取物口内的商品的第二商品信息;比较所述第一商品信息和第二商品信息的匹配程度;在所述匹配程度低于预定的匹配阈值时,确定为商品信息获取错误。
可选地,所述商品上设置有无源RFID标签;所述无源RFID标签内存储有至少一个标签信息,所述标签信息与商品的商品信息对应;所述第一RFID阅读器和第二RFID阅读器均为无源RFID阅读器。
可选地,所述通过第一RFID阅读器,获取离开所述货物存放架的商品的第一商品信息,具体包括:
由所述第一RFID阅读器,在预定区域内,发射连续的载波信号;
通过所述载波信号,激活进入所述预定区域的无源RFID标签;
被激活的无源RFID标签间隔随机时间后,向所述RFID阅读器返回所述标签信息;
根据所述标签信息,获取与所述标签信息对应的商品信息作为第一商品信息。
可选地,所述在预定时间间隔内,通过第二RFID阅读器,获取所述取物口内的商品的第二商品信息,具体包括:
由所述第二RFID阅读器向取物口,以预定的检测周期发射载波信号;
通过所述载波信号,激活进入取物口的无源RFID标签;
接收无源RFID标签返回的射频信号,并记录所述射频信号中的标签信息以及射频信号的信号强度;
判断相邻周期之间,同一个射频信号的信号强度变化是否超出预定的阈值;若是,则确定取物口的商品发生移动;若否,则确定取物口的商品处于稳定状态;
在所述稳定状态维持预定时长后,根据所述标签信息,获取与所述标签信息对应的商品信息作为第二商品信息。
可选地,所述方法还包括:检测是否存在用户购买指令;在存在用户购买指令时,启动所述第一RFID阅读器;在预定的第二时间间隔内, 所述第一RFID阅读器没有检测到标签信息时,确定所述自动售货机出货故障。
本申请实施例另一方面提供了一种无人售货柜系统。该系统包括:设置在无人售货柜的货物存放架上的第一RFID阅读器以及设置在无人售货柜的取物口处的第二RFID阅读器、一个或多个存储器以及一个或多个处理器;所述存储器存储有可执行计算机程序指令,被所述一个或者多个处理器调用,用以执行:通过第一RFID阅读器,获取离开所述货物存放架的商品的第一商品信息;在预定的第一时间间隔内,通过第二RFID阅读器,获取所述取物口内的商品的第二商品信息;比较所述第一商品信息和第二商品信息的匹配程度;在所述匹配程度低于预定的匹配阈值时,确定为商品信息获取错误。
可选地,所述商品上设置有无源RFID标签;所述无源RFID标签内存储有至少一个标签信息,所述标签信息与商品的商品信息对应;所述第一RFID阅读器和第二RFID阅读器均为无源RFID阅读器。
可选地,在执行通过第一RFID阅读器,获取离开所述货物存放架的商品的第一商品信息时,所述处理器具体用于:
由所述第一RFID阅读器,在预定区域内,发射连续的载波信号;
通过所述载波信号,激活进入所述预定区域的无源RFID标签;
被激活的无源RFID标签间隔随机时间后,向所述RFID阅读器返回所述标签信息;
根据所述标签信息,获取与所述标签信息对应的商品信息作为第一商品信息。
可选地,在执行在预定时间间隔内,通过第二RFID阅读器,获取所述取物口内的商品的第二商品信息时,所述处理器具体用于:由所述第二RFID阅读器向取物口,以预定的检测周期发射载波信号;通过所述载波信号,激活进入取物口的无源RFID标签;接收无源RFID标签返回的射频信号,并记录所述射频信号中的标签信息以及射频信号的信号强度;判断相邻周期之间,同一个射频信号的信号强度变化是否超出预定的阈值;若是,则确定取物口的商品发生移动;若否,则确定取物口 的商品处于稳定状态;在所述稳定状态维持预定时长后,根据所述标签信息,获取与所述标签信息对应的商品信息作为第二商品信息。
可选地,所述处理器还用于:检测是否存在用户购买指令;在存在用户购买指令时,启动所述第一RFID阅读器;在预定的第二时间间隔内,所述第一RFID阅读器没有检测到标签信息时,确定所述自动售货机出货故障。
本申请另一方面提供一种计算机程序产品,所述计算机程序产品包括存储在非易失性计算机可读存储介质上的计算机程序,所述计算机程序包括程序指令,当所述程序指令被计算机执行时,使所述计算机基于设置在无人售货柜的货物存放架上的第一RFID阅读器以及设置在无人售货柜的取物口处的第二RFID阅读器,执行上述无人售货柜的商品扫描方法。
本申请实施例提供的无人售货柜的商品扫描方法及系统,对每次的货物销售情况都进行扫描,能够及时的进行商品销售情况的统计,确保自动售货机的可靠运行。另外,扫描过程中,使用的是双重扫描的方式,能够进一步的确保扫描信息的准确性,准确的获取每次商品销售的价格、数量以及其他的信息。
附图说明
为了更清楚地说明本申请实施例的技术方案,下面将对本申请实施例中所需要使用的附图作简单地介绍。显而易见地,下面所描述的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的无人售货柜的商品扫描方法的方法流程图;
图2是本申请另一实施例提供的无人售货柜的商品扫描方法的方法流程图;
图3是本申请另一实施例提供的商品扫描方法中,控制第一RFID阅读器的方法流程图;
图4是本申请实施例提供的无人售货柜的商品扫描系统的硬件结构示意图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本申请进行进一步详细说明。应当理解,此处所描述的具体实施例仅用以解释本申请,并不用于限定本申请。
在典型的自动售货柜的货物销售过程中,每次的货物销售通常由两个动作步骤组成。首先,自动售货机在接收到用户的购物指令并确认付款完毕后,会将货物从货架上推出。然后,从货架上推出的货品会依靠重力或者其他合适的机械传送机构,传送至自动售货柜的取物口内。
最后,由用户从取物口中,将货品取出从而完成一次完整的货物销售交易流程。
所述货物具体可以是任何合适的商品,例如饮料、袋装零食、糖果等等。存放的货架形式也可以是任何合适的形式,例如隔层式的,多个间隔组成的隔间等等。
在自动售货机的实际运行过程中,可以应用本申请实施例提供的商品扫描方法,对上述每次的货物销售过程进行扫描和记录,确保自动售货机可靠、稳定的运行。
图1为本申请实施例提供的无人售货柜的商品扫描方法。如图1所示,与上述货物销售流程中的两个不同的步骤相对应的是,该方法可以包括:
100、分别在无人售货柜的货物存放架上设置第一RFID阅读器以及在无人售货柜的取物口处设置第二RFID阅读器。
在本申请实施例中,基于RFID这样的无线射频技术来实现对于商品的扫描。所述RFID阅读器是能够获取RFID标签内存储的信息的设备,具体可以采用现有任何合适形式的RFID阅读器来完成这样的功能。
通常的,RFID阅读器具有一个特定大小的读取范围,由其天线或者 其他相类似的组件所形成。当电子标签被移动,进入到该读取范围时,即可被RFID阅读器读取获得。
200、通过第一RFID阅读器,获取离开所述货物存放架的商品的第一商品信息。
第一RFID阅读器设置在货物存放架上,其与货物销售过程中的第一个步骤相对应,用于检测从货物存放架脱离的货品,获取其对应的商品信息。
300、在预定的第一时间间隔内,通过第二RFID阅读器,获取所述取物口内的商品的第二商品信息。
第二RFID阅读器则与销售过程中的第二个步骤相对应,用于检测在取物口处的商品信息。如上所述,当商品从货物存放架脱离,进入到取物口之间需要耗费一定的时间。当货物(商品)进入到取物口时,才进一步的启动第二RFID阅读器,获取在取物口中商品的商品信息。
所述预定的第一时间间隔是一个用于反映上述时间的可调节参数。通过该预定的第一时间间隔,能够确保第一RFID阅读器和第二RFID阅读器之间属于同一个货物销售过程。
一般的,所述预定的第一时间间隔可以由具体应用的自动售货机的结构所决定,是一个经验数值。例如1秒,5秒或者更长/更短的间隔。
400、比较所述第一商品信息和第二商品信息的匹配程度。在正常情况下,由于两个步骤均属于同一个货物销售过程。因此,第一商品信息与第二商品信息之间应当不存在任何差别。
但是,在一些可能的情况下,例如驱动机构故障,传动链断裂等,有可能会造成第一商品信息和第二商品信息不一致。在本申请实施例中,使用了匹配程度来衡量两者之间的不一致的情况。
该匹配程度是一个用于量化第一商品信息和第二商品信息之间的的差别的变量,其可以是一个百分数,由商品信息中的各个类型的信息乘以相应的权重后,相加获得。例如,可以根据商品信息中的价格、数量、品牌、体积等进行计算。
500、在所述匹配程度低于预定的匹配阈值时,确定为商品信息获 取错误。
所述匹配阈值也是一个经验数据,通过设置匹配阈值可以保留一些容忍度,允许第一商品信息和第二商品信息之间存在的一些差别,例如某些商品数量上的变化或者货物新旧版本之间的变化。当然,在一些实施例中,也可以将匹配阈值设置为100%,不允许第一商品信息和第二商品信息之间存在差别。
通过上述方式,可以对每次的货物销售情况都进行扫描,能够及时的进行商品销售情况的统计。而且使用的是双重扫描的方式,通过货物销售过程中的两个步骤进行相互的验证,能够保证扫描信息的准确性,准确的获取每次商品销售的价格、数量以及其他的信息。
在本申请实施例中应用的RFID技术可以划分为多种不同的类型。在本实施例中,可以使用成本最低,应用最为广泛的无源RFID标签以及与其配合的无源RFID阅读器。
所述无源RFID标签可以存储有特定的标签信息,例如是某个商品编码或者其他特定的编码。无源RFID标签可以固定在商品的上,例如通过粘贴的方式。
这样的,无源RFID阅读器可以通过读取无源RFID标签中的商品来确定具体的商品。亦即商品与RFID标签之间具有唯一对应的关系。如上所述,利用RFID阅读器的特性,也可以进一步的实现商品的检测。
图2为本申请另一实施例提供的商品扫描方法。该方法给予无源RFID标签来实现。如图2所示,所述方法具体包括:
201、由所述第一RFID阅读器,在预定区域内,发射连续的载波信号。所述预定区域具体可以使商品离开货架时,必须通过的部分路径。例如,货架的商品出口。
具体的预定区域可以通过第一RFID阅读器的天线或者摆放位置设置或者确定。
202、通过所述载波信号,激活进入所述预定区域的无源RFID标签。当商品从货架中被取出或者推出时,固定或者粘附在商品上的无源RFID标签会进入到预定区域中,从而被载波信号激活。
203、被激活的无源RFID标签间隔随机时间后,向所述RFID阅读器返回所述标签信息。
通常的,无源RFID标签与阅读器之间的关系为多对一的关系。每个RFID标签之间无法相互通信。因此,若同时有多个无源RFID标签进入到预定区域时,均会被激活并且在很短的时间间隔、甚至同时返回信息给RFID阅读器。
所述RFID阅读器在很多情况下,是无法处理同时或者接近同时返回的信息。这样的情况若频繁发生会导致RFID标签信息的遗失,从而影响对于商品信息的检测或者判断。
步骤203中无源标签以间隔随机时间的方式返回标签信息则能够尽可能的避免这样的情况的发生。由于每个无源RFID标签均是以随机时间返回信息的。因此,多个标签信息同时返回的概率会极大的降低,确保了RFID阅读器的检测准确性。
204、根据所述标签信息,获取与所述标签信息对应的商品信息作为第一商品信息。
在获取到标签信息以后,可以将这些信息传递至后台或者其他的云端服务器。根据标签信息与商品信息之间的对应关系,确定第一商品信息。
应当说明的是,所述第一商品信息具体可以是多个商品的多种类型的,与商品相关的商品信息的总和。该第一商品信息能够全面的反映某次商品购买行为中,购买的全部商品。
较佳的是,由于第一RFID阅读器需要持续的维持在工作状态。因此,可以通过对启动时间的控制,来降低RFID阅读器消耗的功耗。只在部分时间启动以达到节约功耗的目的。
图3为本申请实施例提供的,用于判断是否启动第一RFID阅读器的方法流程图。如图3所示,所述方法包括:
301、检测是否存在用户购买指令。常规时间中,自动售货机处于正常运行状态时,第一RFID阅读器并不需要启动,检测。只有当出现用户购买指令时,表明用户可能开始进入购物流程。
302、在存在用户购买指令时,启动所述第一RFID阅读器。进入购物流程后,需要及时的启动第一RFID阅读器,保证商品的脱离能够被顺利的检测获得。
303、在预定的第二时间间隔内,所述第一RFID阅读器没有检测到标签信息时,确定所述自动售货机出货故障。在一些情况下,若用户购买商品以后,很长时间没有检测到商品信息,属于异常情况。其可能是由于机械结构卡锁导致商品无法掉落或者其它原因。
这时,可以确定所述自动售货机存在着出货故障,可以通过无线网络或者其它合适的方式,通知到后台的控制终端,使其及时的处理这样的故障。
在一些实施例中,如图2所示,步骤300具体还可以包括:
205、由所述第二RFID阅读器向取物口,以预定的检测周期发射载波信号。在本申请实施例中,第二RFID阅读器的工作模式为周期性工作。这是基于取物口是一个固定容器的特点所决定的。因为货物通常会在取物口中停留较长的时间(相对于经过特定的路径而言)。所以,以周期性工作的方式也不会在停止工作的周期,导致没有检测到某些商品的RFID标签而出现漏检的情况。
206、通过所述载波信号,激活进入取物口的无源RFID标签。与上述步骤相类似的,载波信号也会激活无源RFID标签,从而使阅读器能够读取RFID标签的标签信息。
207、接收无源RFID标签返回的射频信号,并记录所述射频信号中的标签信息以及射频信号的信号强度。与第一RFID阅读器检测步骤中存在的问题相类似的是,第二RFID阅读器也有可能因为多个标签的存在而导致出现标签同时激活响应,产生标签碰撞现象的问题。
射频信号的信号强度与商品的位置相关。通常的,在商品处于特定位置时,综合考虑整个取物口的反射以及其它的情况下,射频信号的信号强度在每个位置均有特定的固定值。因此,利用RFID标签返回的射频信号强度也可以作为商品的位置信息。
208、判断相邻周期之间,同一个射频信号的信号强度变化是否超 出预定的阈值。若是,则执行步骤2081;若否,则执行步骤2082。
第二RFID阅读器是以一定的周期进行工作的。在每个周期都进行一次标签信息的采集。通过这样的方式来确定取物口中的商品的准确数据,是否发生了移动。
2081、确定取物口的商品发生移动。在一次用户购买多个商品时,不同商品落入到取物口的时间通常会有所差别。因此,相互之间会造成影响,出现商品位置的变动。因此,这时可以认为某次购物行为尚未结束,不能进行作为商品信息。
2082、确定取物口的商品处于稳定状态。商品稳定状态表明当前商品在取物口中没有移动,是一个较为稳定的状态。
209、在所述稳定状态维持预定时长后,根据所述标签信息,获取与所述标签信息对应的商品信息作为第二商品信息。
在商品维持一定的稳定时间后,可以认为本次的商品购物过程已经结束,从而可以确定第二商品信息,并用于作为与第一商品信息进行比较。
在本实施例中,RFID阅读器可以多次读取标签信息,这样也可以实现全部商品信息的读取,不会因标签的碰撞或者同时响应等现象导致RFID阅读器获得商品信息不齐全,从而引发错误判断。
与上述方法相对应的,本申请实施例还进一步提供了一种无人售货柜系统。如图4所示,该无人售货柜系统可以包括:
设置在无人售货柜的货物存放架上的第一RFID阅读器401以及设置在无人售货柜的取物口处的第二RFID阅读器402、一个或多个存储器403以及一个或多个处理器404。在本实施例中,以一个存储器403和一个处理器404为例。
所述存储器403具体可以包括:高速随机存取存储器,还可以包括非易失性存储器,例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。在一些实施例中,存储器403可选包括相对于处理器404远程设置的存储器,这些远程存储器可以通过网络连接至视频预览装置。上述网络的实例包括但不限于互联网、企业内部网、局域网、 移动通信网及其组合。
可选地,所述无人售货柜系统还可以根据实际需要,添加或者减省一些设备而不限于以上的设备,例如添加用于实现语音控制的麦克风、无线通信模组等。
所述存储器存储有可执行计算机程序指令,被所述一个或者多个处理器调用,用以执行如下方法步骤:通过第一RFID阅读器,获取离开所述货物存放架的商品的第一商品信息;在预定的第一时间间隔内,通过第二RFID阅读器,获取所述取物口内的商品的第二商品信息;比较所述第一商品信息和第二商品信息的匹配程度;在所述匹配程度低于预定的匹配阈值时,确定为商品信息获取错误。
上述方法步骤也可以根据实际情况划分为一个或者多个具有相应功能的功能单元,由处理器和/或存储器以软件、硬件或者软件硬件结合的方式实现。
在一些实施例中,具体可以选用无源RFID标签作为固定在商品上,用于标识和识别商品的标签。所述无源RFID标签内存储有至少一个标签信息,所述标签信息与商品的商品信息对应。
相对应地,所述第一RFID阅读器和第二RFID阅读器均为无源RFID阅读器。
由于无源RFID标签和阅读器之间是多对一的关系,任意标签之间不存在通信过程。针对不同的步骤中的检测特点和可能存在的检测错误情形,所述处理器还可以进一步的对第一RFID阅读器和第二RFID阅读器进行控制:
对于第一RFID阅读器,所述处理器调用存储器内的计算机可执行程序,实现一个或者多个功能单元,以执行如下步骤:
由所述第一RFID阅读器,在预定区域内,发射连续的载波信号;通过所述载波信号,激活进入所述预定区域的无源RFID标签;被激活的无源RFID标签间隔随机时间后,向所述RFID阅读器返回所述标签信息;根据所述标签信息,获取与所述标签信息对应的商品信息作为第一商品信息。
对于第二RFID阅读器,所述处理器调用存储器内的计算机可执行程序,实现一个或者多个功能单元,以执行如下步骤:由所述第二RFID阅读器向取物口,以预定的检测周期发射载波信号;通过所述载波信号,激活进入取物口的无源RFID标签;接收无源RFID标签返回的射频信号,并记录所述射频信号中的标签信息以及射频信号的信号强度;判断相邻周期之间,同一个射频信号的信号强度变化是否超出预定的阈值;若是,则确定取物口的商品发生移动;若否,则确定取物口的商品处于稳定状态;在所述稳定状态维持预定时长后,根据所述标签信息,获取与所述标签信息对应的商品信息作为第二商品信息。
在一些实施例中,为了避免第一RFID阅读器长时间工作导致的功耗消耗较大的问题,可以通过处理器控制第一RFID阅读器的启动时间以使第一RFID阅读器能够运行在需要的时间段内。
具体的,处理器可以用于检测是否存在用户购买指令。在存在用户购买指令时,处理器启动所述第一RFID阅读器;并且在预定的第二时间间隔内,所述第一RFID阅读器没有检测到标签信息时,确定所述自动售货机出货故障。
本申请实施例还提供一种计算机程序产品,所述计算机程序产品包括存储在非易失性计算机可读存储介质上的计算机程序,所述计算机程序包括程序指令,当所述程序指令被计算机执行时,使所述计算机基于设置在无人售货柜的货物存放架上的第一RFID阅读器以及设置在无人售货柜的取物口处的第二RFID阅读器,执行上述无人售货柜的商品扫描方法方法。
上述无人售货柜系统可执行本申请实施例所提供的方法,具备执行方法相应的功能模块和有益效果。未在本实施例中详尽描述的技术细节,可参见本申请实施例所提供的方法。
专业人员应该还可以进一步意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、计算机软件或者二者的结合来实现,为了清楚地说明硬件和软件的可互换性,在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬 件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。所述的计算机软件可存储于计算机可读取存储介质中,该程序在执行时,可包括如上述各方法的实施例的流程。其中,所述的存储介质可为磁碟、光盘、只读存储记忆体或随机存储记忆体等。
以上所述仅为本申请的实施方式,并非因此限制本申请的专利范围,凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本申请的专利保护范围内。

Claims (11)

  1. 一种无人售货柜的商品扫描方法,其特征在于,包括:
    分别在无人售货柜的货物存放架上设置第一RFID阅读器以及在无人售货柜的取物口处设置第二RFID阅读器;
    通过第一RFID阅读器,获取离开所述货物存放架的商品的第一商品信息;
    在预定的第一时间间隔内,通过第二RFID阅读器,获取所述取物口内的商品的第二商品信息;
    比较所述第一商品信息和第二商品信息的匹配程度;
    在所述匹配程度低于预定的匹配阈值时,确定为商品信息获取错误。
  2. 根据权利要求1所述的方法,其特征在于,所述商品上设置有无源RFID标签;所述无源RFID标签内存储有至少一个标签信息,所述标签信息与商品的商品信息对应;所述第一RFID阅读器和第二RFID阅读器均为无源RFID阅读器。
  3. 根据权利要求2所述的方法,其特征在于,所述通过第一RFID阅读器,获取离开所述货物存放架的商品的第一商品信息,具体包括:
    由所述第一RFID阅读器,在预定区域内,发射连续的载波信号;
    通过所述载波信号,激活进入所述预定区域的无源RFID标签;
    被激活的无源RFID标签间隔随机时间后,向所述RFID阅读器返回所述标签信息;
    根据所述标签信息,获取与所述标签信息对应的商品信息作为第一商品信息。
  4. 根据权利要求3所述的方法,其特征在于,所述在预定时间间隔内,通过第二RFID阅读器,获取所述取物口内的商品的第二商品信息,具体包括:
    由所述第二RFID阅读器向取物口,以预定的检测周期发射载波信号;
    通过所述载波信号,激活进入取物口的无源RFID标签;
    接收无源RFID标签返回的射频信号,并记录所述射频信号中的标签信息以及射频信号的信号强度;
    判断相邻周期之间,同一个射频信号的信号强度变化是否超出预定的阈值;若是,则确定取物口的商品发生移动;若否,则确定取物口的商品处于稳定状态;
    在所述稳定状态维持预定时长后,根据所述标签信息,获取与所述标签信息对应的商品信息作为第二商品信息。
  5. 根据权利要求3所述的方法,其特征在于,所述方法还包括:
    检测是否存在用户购买指令;
    在存在用户购买指令时,启动所述第一RFID阅读器;
    在预定的第二时间间隔内,所述第一RFID阅读器没有检测到标签信息时,确定所述自动售货机出货故障。
  6. 一种无人售货柜系统,其特征在于,包括:
    设置在无人售货柜的货物存放架上的第一RFID阅读器以及设置在无人售货柜的取物口处的第二RFID阅读器、一个或多个存储器以及一个或多个处理器;
    所述存储器存储有可执行计算机程序指令,被所述一个或者多个处理器调用,用以执行:
    通过第一RFID阅读器,获取离开所述货物存放架的商品的第一商品信息;
    在预定的第一时间间隔内,通过第二RFID阅读器,获取所述取物口内的商品的第二商品信息;
    比较所述第一商品信息和第二商品信息的匹配程度;
    在所述匹配程度低于预定的匹配阈值时,确定为商品信息获取错误。
  7. 根据权利要求6所述的无人售货机系统,其特征在于,所述商品上设置有无源RFID标签;所述无源RFID标签内存储有至少一个标签信息,所述标签信息与商品的商品信息对应;所述第一RFID阅读器和 第二RFID阅读器均为无源RFID阅读器。
  8. 根据权利要求7所述的无人售货机系统,其特征在于,在执行通过第一RFID阅读器,获取离开所述货物存放架的商品的第一商品信息时,所述处理器具体用于:
    由所述第一RFID阅读器,在预定区域内,发射连续的载波信号;
    通过所述载波信号,激活进入所述预定区域的无源RFID标签;
    被激活的无源RFID标签间隔随机时间后,向所述RFID阅读器返回所述标签信息;
    根据所述标签信息,获取与所述标签信息对应的商品信息作为第一商品信息。
  9. 根据权利要求8所述的无人售货机系统,其特征在于,在执行在预定时间间隔内,通过第二RFID阅读器,获取所述取物口内的商品的第二商品信息时,所述处理器具体用于:
    由所述第二RFID阅读器向取物口,以预定的检测周期发射载波信号;
    通过所述载波信号,激活进入取物口的无源RFID标签;
    接收无源RFID标签返回的射频信号,并记录所述射频信号中的标签信息以及射频信号的信号强度;
    判断相邻周期之间,同一个射频信号的信号强度变化是否超出预定的阈值;若是,则确定取物口的商品发生移动;若否,则确定取物口的商品处于稳定状态;
    在所述稳定状态维持预定时长后,根据所述标签信息,获取与所述标签信息对应的商品信息作为第二商品信息。
  10. 根据权利要求8所述的无人售货机系统,其特征在于,所述处理器还用于:
    检测是否存在用户购买指令;
    在存在用户购买指令时,启动所述第一RFID阅读器;
    在预定的第二时间间隔内,所述第一RFID阅读器没有检测到标签信息时,确定所述自动售货机出货故障。
  11. 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存储在非易失性计算机可读存储介质上的计算机程序,所述计算机程序包括程序指令,当所述程序指令被计算机执行时,使所述计算机基于设置在无人售货柜的货物存放架上的第一RFID阅读器以及设置在无人售货柜的取物口处的第二RFID阅读器,执行如权利要求1所述的方法。
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