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 PDFInfo
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- 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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- rfid reader
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods 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
- G06K17/0022—Methods 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
- G06K17/0029—Methods 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
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F9/00—Details other than those peculiar to special kinds or types of apparatus
- G07F9/002—Vending 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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Description
Claims (11)
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201710539339.2A CN107358276B (zh) | 2017-07-04 | 2017-07-04 | 无人售货柜的商品扫描方法及其系统 |
CN201710539339.2 | 2017-07-04 |
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