CN113465267B - Intelligent refrigerator, food material management method and medium - Google Patents

Intelligent refrigerator, food material management method and medium Download PDF

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Publication number
CN113465267B
CN113465267B CN202010582749.7A CN202010582749A CN113465267B CN 113465267 B CN113465267 B CN 113465267B CN 202010582749 A CN202010582749 A CN 202010582749A CN 113465267 B CN113465267 B CN 113465267B
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electronic tag
food material
intelligent refrigerator
antenna
radio frequency
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CN113465267A (en
Inventor
谢飞学
曲磊
赵启东
高桢
李正义
高语函
孙菁
高雪松
陈维强
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Hisense Group Holding Co Ltd
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Qingdao Hisense Electronic Industry Holdings Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control devices
    • 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
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2500/00—Problems to be solved
    • F25D2500/06—Stock management
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2600/00—Control issues
    • F25D2600/06—Controlling according to a predetermined profile

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

The application discloses an intelligent refrigerator, a food material management method and a medium. Because this application installs the radio frequency identification antenna on intelligent refrigerator, this radio frequency identification antenna can be according to predetermined cycle, with the electronic tags in the intelligent refrigerator of predetermined different power detection, and whether receive the information that the electronic tags in the intelligent refrigerator feedbacks under different power, confirm first notice information, send this first notice information to the treater, so that follow-up treater carries the first notice information of electronic tags's information according to the radio frequency identification antenna in the predetermined cycle that receives, confirm the target locker room that electronic tags's edible material is located, be favorable to eating the material management to the edible material in the intelligent refrigerator, and need not the intelligent refrigerator that the structure is too complicated, just can confirm the position of the edible material in the intelligent refrigerator, manufacturing cost has been practiced thrift.

Description

Intelligent refrigerator, food material management method and medium
Technical Field
The application relates to the technical field of intelligent household appliances, in particular to an intelligent refrigerator, a food material management method, a device, equipment and a medium.
Background
In the development process of an intelligent refrigerator, food material management is one of the largest bright spots of the intelligent refrigerator. In the food material management process, functions of inquiring food material placing date, searching food material position, automatically reminding food material existence and the like are provided for busy city white collars, so that people are helped to guarantee food material freshness to the maximum extent, and food material waste is reduced.
The existing food material management is mainly realized by a visual scheme or a Radio Frequency Identification (RFID) scheme.
For the visual scheme, the scheme mainly includes that a camera of an intelligent refrigerator is used for collecting food material images, the collected food material images are input into a pre-trained deep learning network model, and food materials contained in the food material images are obtained through the deep learning network model. Although in the scheme, the user only needs to put the food material image into the intelligent refrigerator, through the deep learning network model, the calculation amount required in the process of obtaining the food material contained in the food material image is large, the requirement on hardware configuration of the intelligent refrigerator is very high, and the accuracy of food material identification is easily influenced by factors such as the precision of the collected food material image and the deep learning network model.
For the RFID scheme, the type of the food materials is mainly determined by reading electronic tags of the food materials in the intelligent refrigerator, but when the position of the food materials contained in the intelligent refrigerator is determined, only shielding layers can be added among the refrigerating chamber, the freezing chamber and the temperature-changing chamber, and the refrigerating chamber, the freezing chamber and the temperature-changing chamber are respectively provided with independent RFID antennas which can only read the electronic tags of the food materials stored in the corresponding storage chambers. According to the identification of the RFID antenna of the electronic tag which reads a certain food material and the corresponding relation between the pre-stored identification and the storage room, the storage room where the electronic tag is located is determined, namely the storage room where the food material is stored is determined. In this scheme, need design the shielding layer between every locker room in the intelligent refrigerator to all install the RFID antenna at every shielding layer, just can confirm the target locker room that eats the material place in the intelligent refrigerator, the structure is complicated, and the cost of manufacture is higher.
Disclosure of Invention
The application provides an intelligent refrigerator, a food material management method, a food material management device, food material management equipment and a food material management medium, which are used for solving the problems that the calculation amount required by food material identification of the existing intelligent refrigerator is large, the requirement on hardware configuration is very high, and the structure is too complex.
In a first aspect, the present application provides an intelligent refrigerator, comprising: a radio frequency identification antenna and a processor;
the radio frequency identification antenna is used for detecting the electronic tags of food materials in the intelligent refrigerator at different preset powers according to a preset period, determining first notification information according to whether information fed back by the electronic tags in the intelligent refrigerator is received at different preset powers, and sending the first notification information to the processor;
the processor is configured to receive each first notification message sent by the radio frequency identification antenna in the preset period; and determining a target storage room where the food material of the electronic tag is located according to the first notification information carrying the information of the electronic tag.
In a second aspect, the present application further provides a food material management method, including:
receiving each piece of first notification information sent by a radio frequency identification antenna in a preset period, wherein the first notification information is determined by the fact that whether information fed back by an electronic tag in the intelligent refrigerator is received or not under preset different power in the preset period by the radio frequency identification antenna;
and determining a target storage chamber where the food material of the electronic tag is located according to the information of the electronic tag carried in the first notification information.
In a third aspect, the present application further provides a food material management apparatus, including:
the receiving unit is used for receiving each piece of first notification information sent by the radio frequency identification antenna in a preset period, wherein the first notification information is determined by the radio frequency identification antenna in the preset period according to whether information fed back by the electronic tag in the intelligent refrigerator is received under preset different powers;
and the processing unit is used for determining a target storage chamber where the food material of the electronic tag is located according to the information of the electronic tag carried in the first notification information.
In a fourth aspect, the present application further provides an electronic device, where the electronic device at least includes a processor and a memory, and the processor is configured to implement the steps of the food material management method as described above when executing a computer program stored in the memory.
In a fifth aspect, the present application further provides a computer-readable storage medium storing a computer program, which when executed by a processor, implements the steps of the food material management method as described above.
As the radio frequency identification antenna is arranged on the intelligent refrigerator, the radio frequency identification antenna can detect the electronic tags in the intelligent refrigerator according to the preset period and the preset different powers, thereby identifying the electronic tags of food materials in different storage chambers in the intelligent refrigerator, determining first notification information according to whether the information fed back by the electronic tags in the intelligent refrigerator is received under different powers, sending the first notification information to the processor, so that the subsequent processor determines a target storage chamber where the food material of the electronic tag is located according to the received first notification information carrying the information of the electronic tag sent by the radio frequency identification antenna in the preset period, which is favorable for food material management of the food material in the intelligent refrigerator, and need not the intelligent refrigerator that the structure is too complicated, just can confirm the position of eating the material in the intelligent refrigerator, practiced thrift the cost of manufacture.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an intelligent refrigerator according to some embodiments of the present application;
FIG. 2 is a schematic diagram of an RFID antenna for detecting RFID tags at different distances with different power levels according to some embodiments of the present application;
FIG. 3 is a graphical illustration of a correlation between times and distances provided by some embodiments of the present application;
4(a) -4(b) are schematic views illustrating the installation position of an RFID antenna according to some embodiments of the present application;
fig. 5 is a schematic structural diagram of a smart refrigerator according to some embodiments of the present application, in which four rfid antennas are simultaneously installed at the bottom and the bottom of the smart refrigerator;
fig. 6 is a schematic view illustrating an installation position of an access operation recognition antenna according to some embodiments of the present application;
fig. 7 is a schematic view of a process for realizing food material management of a specific intelligent refrigerator according to some embodiments of the present application;
fig. 8 is a schematic view illustrating a food material management process according to some embodiments of the present application;
fig. 9 is a schematic structural diagram of a food material management apparatus according to some embodiments of the present application;
fig. 10 is a schematic structural diagram of an electronic device according to some embodiments of the present application.
Detailed Description
In order to accurately determine a target storage chamber where food materials in an intelligent refrigerator are located, the application provides the intelligent refrigerator, a food material management method, a food material management device, equipment and a medium.
To make the objects, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
RFID is a non-contact automatic identification technology, and is one of the core technologies of the Internet of things. It automatically identifies the target object (electronic tag) by radio frequency signal, thereby obtaining or recording the relevant data of the target object. The RFID can be applied to various severe environments, the technical development is mature, the identification accuracy is high, and manual intervention is not needed in the process of identifying the target object, so that the RFID is widely applied to the fields of logistics, unmanned goods selling and the like.
Among them, an electronic tag, also called an RFID tag, includes a chip storing data that can be used as identification information for identifying an article and a built-in antenna.
In the application scene of intelligent refrigerator, the user can be on eating the material and attach rather than the electronic tags who corresponds the kind, will attach the edible material that has attached electronic tags and put into the locker room. In order to determine a storage chamber where food materials are located in the intelligent refrigerator, the following intelligent refrigerator can install the radio frequency identification antennas at the inner side of the intelligent refrigerator, for example, at the top or the bottom of the inner side of the intelligent refrigerator, and each radio frequency identification antenna detects the electronic tags of the food materials in the intelligent refrigerator at preset different powers according to a preset period. Based on the information of the electronic tags detected by each radio frequency identification antenna, a processor of the intelligent refrigerator carries out corresponding processing, and therefore the storage chamber where the food materials of the electronic tags are located is determined.
Fig. 1 is a schematic structural diagram of an intelligent refrigerator provided in some embodiments of the present application, where the intelligent refrigerator includes: a radio frequency identification antenna 12 and a processor 11;
the radio frequency identification antenna 12 is configured to detect an electronic tag of a food material in the intelligent refrigerator at preset different powers according to a preset period, determine first notification information according to whether information fed back by the electronic tag in the intelligent refrigerator is received at the different powers, and send the first notification information to the processor 11;
the processor 11 is configured to receive each first notification message sent by the radio frequency identification antenna 12 in the preset period; and determining a target storage chamber where the food material of the electronic tag is located according to the first notification information carrying the information of the electronic tag.
In the application, the intelligent refrigerator comprises a processor 11 and a radio frequency identification antenna 12, the processor 11 is connected with the radio frequency identification antenna 12, the radio frequency identification antenna 12 is used for detecting an electronic tag of food in the intelligent refrigerator, determining first notification information according to whether the information of the electronic tag is detected, namely whether information fed back by the electronic tag is received, sending the first notification information to the processor 11, and based on the received first notification information, the processor 11 performs corresponding processing, so as to determine a target storage chamber where the food of the electronic tag is located.
In general, each storage chamber in the intelligent refrigerator is sequentially placed from top to bottom, and the electronic tags of food materials in different storage chambers are different from the radio frequency identification antenna 12 on the intelligent refrigerator. The maximum detection distance of the rfid antenna 12 is related to the detection power thereof, and the larger the detection power is, the farther the maximum detection distance of the rfid antenna 12 is, the smaller the detection power is, and the closer the maximum detection distance of the rfid antenna 12 is.
If radio frequency identification antenna 12 installs at the inboard top of intelligent refrigerator, from the order of top to bottom in the intelligent refrigerator, the locker room that sets up is locker room 1, locker room 2, locker room 3 respectively, and this radio frequency identification antenna 12 power a can detect the electronic tags of eating the material in locker room 1 nearest among the intelligent refrigerator, and this radio frequency identification antenna 12 needs to use the power b that is greater than power a, just can detect the electronic tags of eating the material in locker room 2.
Therefore, in order to conveniently and accurately determine the target storage chamber where the food material is located, in the present application, a period of detecting the electronic tag of each rfid antenna 12 and a power of the electronic tag for detecting the food material in the detection period are preset, where the power of the electronic tag for detecting the food material in the detection period of the rfid antenna 12 is different. In the practical application process, after the user attaches the electronic tag to the food material, the food material attached with the electronic tag is placed in the intelligent refrigerator, each radio frequency identification antenna 12 of the intelligent refrigerator detects the electronic tag in the intelligent refrigerator according to a preset period and preset different power, when the electronic tag in the intelligent refrigerator enters the detection range of the radio frequency identification antenna 12, induced current can be generated and becomes an activated state, then feedback information is generated according to data stored inside, and the feedback information is sent to the radio frequency identification antenna 12 through the antenna of the user. The radio frequency identification antenna 12 determines a first notification message according to whether information fed back by an electronic tag in the intelligent refrigerator is received under different preset powers, and sends the first notification message to the processor 11 of the intelligent refrigerator, wherein if the radio frequency identification antenna 12 receives the information fed back by the electronic tag in the intelligent refrigerator under a certain power, the first notification message is generated according to the fed-back information, and if the radio frequency identification antenna 12 does not receive the information fed back by the electronic tag in the intelligent refrigerator under a certain power, the first notification message is generated according to a detection result that the electronic tag is not detected.
In addition, in order to ensure that the electronic tag of the food material in each storage chamber in the intelligent refrigerator can be detected by different powers as much as possible, the rfid antenna 12 can be installed at the top, or the bottom, of the inner side of the intelligent refrigerator.
In a preset period, the electronic tags of the food materials in the intelligent refrigerator are detected with preset power. The predetermined different power may be determined according to a predetermined increasing or decreasing function, for example, p ═ t2、p＝t、p＝logt、p＝etAn equal function, wherein p is power, and t is relative time in the preset period; or may be determined according to the statistical minimum power of each storage room, which can be detected in advance. Specifically, the power setting mode may be set according to actual requirements, and is not limited specifically herein.
It should be noted that when a preset period is set, different values can be set according to different scenes, and if it is desired to detect the electronic tags of the food materials in the intelligent refrigerator in time, the preset period can be set to be shorter; if the resource consumed by frequently detecting the electronic tag is expected to be reduced, the preset period can be set to be longer, but the preset period is not too large or too small, and the preset period is flexibly set according to actual requirements during specific setting.
In this application, the rfid antenna 12 and the processor 11 share a timer, and when the rfid antenna 12 starts to detect the electronic tag according to a preset period, the processor 11 also starts to receive the first notification information sent by the rfid antenna 12 according to the preset period. Based on the above embodiment, after the processor 11 receives each first notification message sent by the radio frequency identification antenna 12 in a preset period, the processor 11 analyzes each first notification message, and determines the first notification message carrying the information of the electronic tag according to the analysis result. And performing corresponding processing according to the first notification information carrying the information of the electronic tag, so as to determine a target storage room where the food material of the electronic tag is located.
When the number of the radio frequency identification antennas 12 is set, different values can be set according to different scenes, and if the target storage chamber where the determined food material is located is expected to be more accurate, the number can be set to be larger; if the manufacturing cost is saved, the number can be set to be smaller, but the number is not too large or too small, preferably 3 or 4, and the specific setting needs to be flexibly set according to actual requirements.
Since the radio frequency identification antenna 12 is installed on the intelligent refrigerator, the radio frequency identification antenna 12 can detect the electronic tags in the intelligent refrigerator at preset different powers according to preset periods, thereby identifying the electronic tags of food materials in different storage chambers in the intelligent refrigerator, determining first notification information according to whether the information fed back by the electronic tags in the intelligent refrigerator is received at different powers, sending the first notification information to the processor 11, so that the subsequent processor 11 determines a target storage chamber where the food material of the electronic tag is located according to the received first notification information carrying the information of the electronic tag sent by the radio frequency identification antenna 12 in the preset periods, which is beneficial to food material management of the food materials in the intelligent refrigerator, and can determine the position of the food material in the intelligent refrigerator without the intelligent refrigerator with an excessively complex structure, the manufacturing cost is saved.
In order to accurately determine a target storage compartment where a food material of an electronic tag is located, on the basis of the above embodiment, in the present application, the processor 11 is specifically configured to, for each electronic tag, obtain a total number of times of first notification information that is sent by the radio frequency identification antenna 12 and carries information of the electronic tag in the preset period; and determining the storage room corresponding to the total times as a target storage room where the food material of the electronic tag is located according to the corresponding relation between the times stored in advance and the storage rooms.
Because the electronic tags of the food materials in different storage rooms are different from the radio frequency identification antenna 12, the power of the electronic tags of the food materials in each storage room detected by the radio frequency identification antenna 12 is different, the power required by the electronic tags of the food materials in the storage room close to the radio frequency identification antenna 12 is smaller, and the power required by the electronic tags of the food materials in the storage room far away from the radio frequency identification antenna 12 is larger. But when the larger power is used to detect the electronic tag of the food material in the far storage room, the electronic tag of the food material in the near storage room will also be detected, so that the first times of the electronic tags of the food materials in the closer storage room are detected are more than the second times of the electronic tags of the food materials in the farther storage room, and the number of times the electronic tag is detected is inversely proportional to the distance between the storage compartment in which it is located and the rfid antenna 12, i.e., the closer a certain storage compartment is to the rfid antenna 12, the more closely the rfid antenna 12 is within a predetermined period, the more times the electronic tag of the food material in the storage compartment is detected with different power, the farther the distance between a certain storage compartment and the rfid antenna 12 is, the rfid antenna 12 detects the electronic tags of the food materials in the storage compartment with different powers for a predetermined period less frequently.
Fig. 2 is a schematic diagram of an rfid antenna for detecting electronic tags at different distances with different power levels according to some embodiments of the present application, where the greater the power of the rfid antenna 12, the greater the detection range, and the farther away the electronic tag can be detected.
Based on this, in order to accurately determine the target storage room where the food material of the electronic tag is located, it is known in advance to perform detection several times in one cycle, and therefore, in the present application, the correspondence between the times and the storage room is stored in advance. Based on the above embodiment, after the processor 11 receives each first notification message sent by the rfid antenna 12 in a preset period, each first notification message is analyzed first, and each first notification message carrying information of the electronic tag is determined. According to the first notification information carrying the information of the electronic tag, each electronic tag detected by the rfid antenna 12 in the preset period is determined. For each electronic tag, determining the total times of first notification information carrying information of the electronic tag, which is sent by the radio frequency identification antenna 12 in a preset period; and determining the storage room corresponding to the total times according to the corresponding relation between the times stored in advance and the storage rooms, and determining the storage room corresponding to the total times as a target storage room where the food material of the electronic tag is located.
Specifically, for each electronic tag, the total number of times that the rfid antenna 12 detects the electronic tag with different power may be determined by the following formula:
Figure BDA0002553005050000061
wherein k is a positive integer greater than 0, z is a preset number of different powers, and n is a positive integer not less than 1kThe total number of times of the first notification information carrying the information of the electronic tag k transmitted for the rfid antenna 12; p is a radical of formulakPower at which the radio frequency identification antenna 12 detects the electronic tag k; function isgetEPC (p)k) Is equal to the power pkIf the rfid antenna 12 detects the electronic tag k, it returns to 1, otherwise it returns to 0.
It should be noted that, in the correspondence relationship between the pre-stored times and the storage rooms, different times may correspond to one storage room, but one time corresponds to only one storage room.
In another possible embodiment, in order to further accurately determine a target storage chamber where a food material of each electronic tag is located, in the present application, the processor 11 is specifically configured to, if at least two radio frequency identification antennas 12 are installed at the top or the bottom of the intelligent refrigerator, obtain, for each electronic tag carried in the first notification information sent by each radio frequency identification antenna 12, a target number of times of the first notification information carried with information of the electronic tag sent by the radio frequency identification antenna 12 in the preset period; determining a target distance corresponding to the target times according to a corresponding relation between the times and the distances which are stored in advance; for each electronic tag, according to the measured target distance corresponding to each radio frequency identification antenna 12 of the electronic tag, determining the target vertical distance from the position of the electronic tag to the plane on which each radio frequency identification antenna 12 is installed; and determining the storage chamber corresponding to the target vertical distance as the target storage chamber where the food material of the electronic tag is located according to the corresponding relationship between the vertical distance and the storage chamber which is stored in advance.
In the practical application process, the radio frequency identification antenna 12 may detect the electronic tag of the food material located in the center of one storage room a, and the required power is the same as the electronic tag of the food material located in the edge of another storage room B, which results in that the number of times that the radio frequency identification antenna 12 detects the electronic tag of the food material located in different storage rooms is the same, so that the target storage room where the food material of each tag is located is determined to be inaccurate only according to the corresponding relationship between the number of times and the storage rooms. Generally, the number of times that the electronic tag of the food material in the smart refrigerator is detected has strong correlation with the distance between the electronic tag and the radio frequency identification antenna 12, and the number of times that the electronic tag of the food material in the smart refrigerator is detected is inversely proportional to the distance between the food material of the electronic tag and the radio frequency identification antenna 12, that is, the more the number of times that the electronic tag of the food material in the smart refrigerator is detected is, the closer the distance between the food material of the electronic tag and the radio frequency identification antenna 12 is, the closer the target storage chamber where the food material of the electronic tag is located is to the radio frequency identification antenna 12 is, the less the number of times that the electronic tag of the food material in the smart refrigerator is detected is, the farther the distance between the food material of the electronic tag and the radio frequency identification antenna 12 is, and the farther the target storage chamber where the food material of the electronic tag is located is from the radio frequency identification antenna 12 is.
Fig. 3 is a schematic diagram of a correlation between times and distances according to some embodiments of the present disclosure. As shown in the figure, when the distance between the electronic tag and the rfid antenna 12 is 20cm, the number of times that the electronic tag is detected is at most, which is 6 times, and when the distance between the electronic tag and the rfid antenna 12 is 100cm, the number of times that the electronic tag is detected is at least, which is only 2 times, so that it can be known that the number of times that the electronic tag of the food material in the intelligent refrigerator is detected is in inverse proportion to the distance between the food material of the electronic tag and the rfid antenna 12, and has strong correlation.
Based on this, in order to further accurately determine the target storage chamber where the food material of each electronic tag is located, in the present application, at least two rfid antennas 12 may be installed at the top or the bottom of the inner side of the intelligent refrigerator, and the correspondence between the number of times and the distance may be stored in advance. After receiving each first notification message sent by each rfid antenna 12 in the preset period, the processor 11 first obtains the first notification message carrying the information of the electronic tag sent by each rfid antenna 12 in the preset period. Then, for each electronic tag carried in the first notification information sent by each rfid antenna 12, the target frequency of the first notification information carrying the information of the electronic tag sent by the rfid antenna 12 is determined, and the distance corresponding to the target frequency is determined according to the correspondence between the pre-stored frequency and the distance.
Fig. 4(a) -4(b) are schematic views illustrating an installation position of an rfid antenna 12 according to some embodiments of the present application. As shown in fig. 4(a), three RFID antennas 12, namely, an RFID antenna 1, an RFID antenna 2 and an RFID antenna 3, are mounted on the top of the inner side of the intelligent refrigerator, and the three RFID antennas 12 are arranged as shown in fig. 4 (b). In fig. 4(a), 5 storage chambers are provided in the intelligent refrigerator, and food materials attached with electronic tags, namely, RFID tags 1 and 2, are provided in the first-layer storage chamber and the second-layer storage chamber.
Suppose RFID antennas 1, RThe power required by the FID antenna 2 and the RFID antenna 3 for detecting the electronic tag of the food material in the first-layer storage chamber in the preset detection period is p respectively211、p311、p411，p321、p421，p131、p231、p331、p431Then, the processor 11 determines the target number of times that each RFID antenna 12 transmits the first notification information carrying information of the RFID tag 1, where the target number of times that the RFID antenna 1 transmits the first notification information carrying information of the RFID tag 1 is 3, the target number of times that the RFID antenna 2 transmits the first notification information carrying information of the RFID tag 1 is 4, and the target number of times that the RFID antenna 3 transmits the first notification information carrying information of the RFID tag 1 is 3, respectively. Specifically, for each electronic tag carried in the first notification information sent by each radio frequency identification antenna 12, determining the number of times that each radio frequency identification antenna 12 detects the electronic tag with different power, that is, determining the number of times that the target carrying the electronic tag is sent may be determined by the following formula:
Figure BDA0002553005050000081
j is a positive integer not less than 1, k is a positive integer greater than 0, z is a preset number of different powers, and n is a positive integer not less than 1jkThe target times of first notification information carrying the information of the electronic tag k and sent by the jth radio frequency identification antenna 12 in a preset period; p is a radical ofjkDetecting the power of the electronic tag k for the jth rfid antenna 12; function isgetEPC (p)jk) Is at a power pjkIf the jth rfid antenna 12 detects the electronic tag k, then 1 is returned, otherwise 0 is returned.
After the number of times that each RFID antenna 12 transmits the first notification information carrying the information of the RFID tag 1 is determined based on the above method, according to the correspondence relationship between the number of times and the distance stored in advance, it is determined that the target distance corresponding to the number of times 3 of the RFID antenna 1 is L1, the target distance corresponding to the number of times 2 of the RFID antenna 2 is L2, and the target distance corresponding to the number of times 4 of the RFID antenna 3 is L3. Based on the same method, it is determined that the target distance corresponding to the target number of times of RFID tag 2 by RFID antenna 1 is L1 ', the target distance corresponding to the target number of times of RFID tag 2 by RFID antenna 2 is L2 ', and the target distance corresponding to the target number of times of RFID tag 2 by RFID antenna 3 is L3 '.
Since the distance between the food materials in the different storage rooms and the distance between the radio frequency identification antennas 12 are different, in the present application, for the convenience of determining the target storage room where the food material of the electronic tag is located, the corresponding relationship between the vertical distance and the storage room is pre-stored. In a specific implementation process, for each electronic tag in the intelligent refrigerator, since the position of the food material of the electronic tag in the intelligent refrigerator is determined, and based on the above embodiment, according to the target number of times that each radio frequency identification antenna 12 sends the first notification information carrying the information of the electronic tag, after the target distance between each radio frequency identification antenna 12 and the food material of the electronic tag is respectively determined, based on each target distance, the specific position of the food material of the electronic tag can be determined. When determining the specific position of the food material of the electronic tag, a preset processing algorithm may be used for determining, for example, an algorithm such as space geometry.
Specifically, for example, at least two rfid antennas 12 are installed on the intelligent refrigerator, each rfid antenna 12 transmits an electronic tag a in a preset period, and according to a determined target distance between the rfid antenna 12 and the food material of the electronic tag a, a circle with the rfid antenna 12 as a center and the target distance as a radius may be determined. And taking the intersection point of each circle as the position of the food material of the electronic tag A. If two antennas are available, a triangle can be constructed according to each circle center and the intersection point, and the target vertical distance of the connecting line of the food material of the electronic tag A and the two radio frequency identification antennas 12 is determined based on the triangle and each target distance; if at least more than three radio frequency identification antennas 12 are installed on the intelligent refrigerator, triangles are constructed according to any two circle centers and the intersection point, and the vertical distance from the food material of the electronic tag A to the plane where the radio frequency identification antennas 12 are located is determined based on each triangle and the corresponding target distance. Wherein, each radio frequency identification antenna 12 is on the same plane, such as the top or the bottom of the inner side of the intelligent refrigerator.
After the target vertical distance from the position of the electronic tag to the plane where each rfid antenna 12 is installed is determined, the storage room corresponding to the target vertical distance is determined according to the correspondence relationship between the pre-stored vertical distance and the storage room, and finally the storage room corresponding to the target vertical distance is determined as the target storage room where the food material of the electronic tag is located.
It is believed that a person skilled in the art can determine a specific process based on the content described in the embodiments of the present application, and details are not described herein.
In order to accurately determine the target storage chamber where the food material of each electronic tag is located, on the basis of the above embodiments, in the present application, the radio frequency identification antenna 12 is specifically configured to determine first notification information according to different powers and whether information fed back by the electronic tag in the intelligent refrigerator is received under the corresponding power;
the processor 11 is specifically configured to determine, for each electronic tag, a minimum power value according to power carried in first notification information that is sent by the radio frequency identification antenna 12 in the preset period and carries information of the electronic tag; and determining the storage room corresponding to the minimum power value as a target storage room where the food material of the electronic tag is located according to the corresponding relation between the pre-stored power and the storage room.
Since the power required for the rfid antenna 12 to detect the electronic tag of the food material in the storage compartment closer thereto is smaller, the power required for the rfid antenna 12 to detect the electronic tag of the food material in the storage compartment farther therefrom is larger. In this case, in order to accurately determine the target storage room in which the food material of each electronic tag is located, in the present application, the correspondence relationship between the power and the storage room is stored in advance. When the rfid antenna 12 receives information fed back by the electronic tag in the smart refrigerator according to different powers and corresponding powers, it determines first notification information and sends the first notification information to the processor 11.
After receiving each first notification message sent by the radio frequency identification antenna 12 in a preset period, the processor 11 analyzes the first notification message first, and determines each first notification message carrying information of the electronic tag. And acquiring each electronic tag sent by the rfid antenna 12 according to each first notification message carrying information of the electronic tag. For each electronic tag, determining each power carried in first notification information carrying information of the electronic tag sent by the radio frequency identification antenna 12 in a preset period, and determining a minimum power value; and determining the storage room corresponding to the minimum power value according to the corresponding relation between the pre-stored power and the storage room, and determining the storage room corresponding to the minimum power value as a target storage room where the food material of the electronic tag is located.
It should be noted that, in the correspondence relationship between the pre-stored power and the storage chambers, different powers may correspond to one storage chamber, but one power corresponds to only one storage chamber.
In another possible embodiment, in order to further accurately determine the target storage chamber where the food material of each electronic tag is located, in the present application, the rfid antenna 12 is specifically configured to determine the first notification information according to different powers and whether information fed back by the electronic tag in the intelligent refrigerator is received under the corresponding power;
the processor 11 is specifically configured to, if at least two radio frequency identification antennas 12 are installed at the top or the bottom of the intelligent refrigerator, determine, for each electronic tag carried in the first notification information sent by each radio frequency identification antenna 12, a minimum power value according to power carried in the first notification information carrying information of the electronic tag sent by the radio frequency identification antenna 12 in the preset period; determining a target distance corresponding to the minimum power value according to a pre-stored corresponding relationship between power and distance; for each electronic tag, according to the measured target distance corresponding to each radio frequency identification antenna 12 of the electronic tag, determining a target vertical distance from the position of the electronic tag to a plane on which each radio frequency identification antenna 12 is installed; and determining the storage room corresponding to the target vertical distance according to the corresponding relation between the prestored vertical distance and the storage room, and determining the storage room corresponding to the target vertical distance as the target storage room where the food material of the electronic tag is located.
In the practical application process, the radio frequency identification antenna 12 may detect the electronic tag of the food material located in the center of one storage room and the electronic tag of the food material located in the edge of another storage room, which have the same required power, so that it may be inaccurate to determine the target storage room where the food material of each tag is located only according to the corresponding relationship between the power and the storage rooms. Therefore, in order to further accurately determine the target storage chamber where the food material of each electronic tag is located, in the present application, at least two rfid antennas 12 may be installed at the top or bottom of the intelligent refrigerator, and a corresponding relationship between power and distance is stored in advance. After receiving each first notification message sent by each rfid antenna 12 in the preset period, the processor 11 first obtains the first notification message carrying the information of the electronic tag sent by each rfid antenna 12 in the preset period. Then, for each electronic tag carried in the first notification information sent by each rfid antenna 12, the power carried in the first notification information carrying the information of the electronic tag sent by the rfid antenna 12 is determined, so as to determine the minimum power value according to each power corresponding to the electronic tag, and determine the distance corresponding to the minimum power value according to the correspondence between the pre-stored power and the distance.
Since the distance between the food materials in different storage rooms and the distance between the radio frequency identification antennas 12 is different, in the present application, for the convenience of determining the target storage room where the food material of the electronic tag is located, the corresponding relationship between the vertical distance and the storage room is pre-stored. In a specific implementation process, for each electronic tag, since the position of the food material of the electronic tag in the intelligent refrigerator is determined, and based on the above embodiment, the distance between each radio frequency identification antenna 12 and the food material of the electronic tag is determined according to the minimum power value of the electronic tag detected by each radio frequency identification antenna 12, and then based on each distance, the specific position of the food material of the electronic tag can be determined. When determining the specific position of the food material of the electronic tag, a preset processing algorithm may be used for determining, for example, an algorithm such as space geometry.
The specific method for determining the specific position of the food material of the electronic tag based on each distance is the same as the above embodiment, and is not described herein again.
Furthermore, since it may occur that the food material of the electronic tag at different positions in the same storage room may not be accurately determined only from the rfid antenna 12 installed at the top or bottom. Therefore, at least two rfid antennas 12 may be simultaneously installed at the bottom and the bottom of the smart refrigerator. Then, based on the data detected by the at least two rfid antennas 12 on the top or the bottom, the corresponding processing of the method of the above embodiment is performed, so as to determine the target storage chamber where the food material of each electronic tag is located.
Fig. 5 is a schematic structural diagram of a smart refrigerator provided with four rfid antennas 12 installed at the bottom and the bottom of the smart refrigerator according to some embodiments of the present application. In fig. 5, 4 RFID antennas distributed in a 2 × 2 matrix, namely, RFID antenna 1, RFID antenna 2, RFID antenna 3, and RFID antenna 4, are mounted on the top of the intelligent refrigerator, and 4 RFID antennas distributed in a 2 × 2 matrix, namely, RFID antenna 5, RFID antenna 6, RFID antenna 7, and RFID antenna 8, are also mounted on the bottom of the intelligent refrigerator. Based on the data detected by the 8 RFID antennas at the top and the bottom, the corresponding processing of the method of the above embodiment is performed, so as to determine the target storage chamber where the food material of each electronic tag is located.
In order to accurately identify the change of the access state of the food material in the intelligent refrigerator, on the basis of the above embodiments, in the present application, the intelligent refrigerator further includes: an access action recognition antenna;
the access action recognition antenna is installed on the inner side of the intelligent refrigerator, faces towards a refrigerator door body, and is used for detecting the electronic tags of food materials in the intelligent refrigerator at preset different powers according to the preset period, determining second notification information according to whether information fed back by the electronic tags in the intelligent refrigerator is received at the different powers, and sending the second notification information to the processor 11;
the processor 11 is configured to receive each second notification message sent by the access action identification antenna in the preset period, and determine an access state of the food material of the electronic tag according to information of the electronic tag carried in the second notification message.
In the prior art, for determining the access state of the food material, the access state of the food material is generally updated by the processor 11 through a door opening and closing signal of the refrigerator door, after the door is closed, the detected food material with the newly added electronic tag is determined as the stored food material, and the detected food material with the reduced electronic tag is determined as the taken food material. According to the method for determining the access state of the food material, the access state of the food material can be updated only after a door opening and closing signal of the refrigerator door body is received, so that the process of determining the access state of the food material is delayed for a long time, the access state of the food material in the intelligent refrigerator cannot be updated in time, and the experience of a user is reduced.
Therefore, in order to determine the access state of the food material in time, in the present application, the intelligent refrigerator further includes an access operation identification antenna, the access operation identification antenna is also connected to the processor 11 of the intelligent refrigerator, the access operation identification antenna is configured to detect an electronic tag of the food material in the intelligent refrigerator, determine second notification information according to whether the information of the electronic tag is detected, that is, whether information fed back by the electronic tag is received, send the second notification information to the processor 11, and based on the second notification information sent by the access operation identification antenna, the processor 11 performs corresponding processing, thereby determining the access state of the food material of the electronic tag.
In order to determine the access state of the food material in time and improve user experience, in the present application, the access action recognition antenna detects the electronic tag of the food material in the smart refrigerator according to a preset period, where the preset period is less than the time taken to generally perform the access action. If the access state of the food material is determined as soon as possible, the preset period can be set to be shorter, if a large amount of resources are consumed to avoid frequently determining the access state of the food material, the preset period can be set to be longer, but the preset period is not too long or too short, and the preset period can be flexibly set according to actual requirements.
In general, when a user accesses food materials of an electronic tag in an intelligent refrigerator, the distance between the food materials of the electronic tag and the intelligent refrigerator is changed, for example, when the user stores the food materials of the electronic tag into a storage chamber in the intelligent refrigerator, the distance between the food materials of the electronic tag and the storage chamber is closer and closer; when the user takes out certain electronic tags's edible material from a certain locker room in the intelligent refrigerator, this electronic tags's edible material can be more and more far away apart from this locker room.
Therefore, in order to conveniently and accurately determine the access state of the food material, in the present application, the access operation identification antenna may also detect the electronic tag of the food material in the smart refrigerator at preset different powers according to the preset period in the above embodiment, determine second notification information according to whether information fed back by the electronic tag is received at different powers, and send the second notification information to the processor 11 of the smart refrigerator, where if the access operation identification antenna receives the information fed back by the electronic tag in the smart refrigerator at a certain power, the second notification information is generated according to the fed-back information, and if the access operation identification antenna does not receive the information fed back by the electronic tag in the smart refrigerator at a certain power, the second notification information is generated according to a detection result that the electronic tag is not detected.
Wherein, when the user carries out the access operation to the edible material in the intelligent refrigerator, should eat the material and should correspond the change of locker room distance on the horizontal direction in the intelligent refrigerator, can be greater than the change of distance on the vertical direction. Therefore, in order to ensure that the access state of the food material of the electronic tag can be determined according to the change of the distance between the food material and the corresponding storage chamber in the intelligent refrigerator in the horizontal direction, the access action recognition antenna is installed on the inner side of the intelligent refrigerator and faces towards the refrigerator door body.
When the number of the access action identification antennas is set, different values can be set according to different scenes, and if the determined target storage chamber where the food material is located is expected to be more accurate, the number can be set to be larger; if the manufacturing cost is expected to be saved, the number can be set to be smaller, but the number is not too large or too small, for example, one storage chamber is installed in each storage chamber, or one storage chamber is installed in every other storage chamber, and the specific setting needs to be flexibly set according to actual requirements.
Fig. 6 is a schematic view of the installation positions of access operation identification antennas according to some embodiments of the present application, as shown in fig. 6, five access operation identification antennas, namely, an RFID antenna a, an RFID antenna b, an RFID antenna c, an RFID antenna d, and an RFID antenna e, are installed at the top of the inner side of the smart refrigerator, and the placement positions of the five access operation identification antennas are as shown in fig. 6, and one access operation identification antenna is installed in each of 5 storage rooms in the smart refrigerator. In order to save the manufacturing cost, only one first-layer storage room, one third-layer storage room and one fifth-layer storage room can be respectively installed; in order to make the determined target storage room where the food material is located more accurate, two sides of the RFID antenna a, the RFID antenna b, the RFID antenna c, the RFID antenna d and the RFID antenna e can be respectively provided with one more storage room.
In order to accurately identify a change of an access state of a food material in an intelligent refrigerator, in the present application, on the basis of the foregoing embodiments, if at least one access operation identification antenna is installed in the intelligent refrigerator, for each electronic tag carried in second notification information sent by each access operation identification antenna, the processor 11 is specifically configured to obtain an identification number of the second notification information carrying information of the electronic tag sent by the access operation identification antenna in the preset period, and determine a number difference between the identification number and a cached identification number corresponding to the access operation identification antenna; aiming at each electronic tag, determining the maximum value of the frequency difference according to the measured frequency difference corresponding to each access action identification antenna of the electronic tag; if the identification times corresponding to the maximum time difference value are larger than a preset first storage time threshold value, and the absolute value of the maximum time difference value is larger than a preset second storage time threshold value, determining that the access state of the food material of the electronic tag is storage; and if the identification times corresponding to the maximum time difference value are smaller than a preset first taking-out time threshold value, and the absolute value of the maximum time difference value is larger than a preset second taking-out time threshold value, determining that the access state of the food material of the electronic tag is taken out.
In the practical application process, when the food material of a certain electronic tag in the intelligent refrigerator is taken out, the food material is more and more far away from a storage chamber where the food material is located, and the times that the access action identification antenna in the intelligent refrigerator detects the food material of the electronic tag with different powers in two adjacent preset periods are less and less. When the food material of one electronic tag is stored in the intelligent refrigerator, the food material is closer to the storage chamber into which the food material is placed, and the times that the access action identification antenna in the intelligent refrigerator detects the food material of the electronic tag with different powers in two adjacent preset periods are more and more.
Therefore, in order to accurately identify the access state of the food material of each electronic tag, in the present application, the identification times of each electronic tag identified by each access action identification antenna in each preset period are cached. Based on the above embodiment, after acquiring each electronic tag carried in the first notification information sent by each access operation identification antenna, the processor 11 acquires the identification times of the second notification information carrying the information of the electronic tag sent by the access operation identification antenna and the identification times of the second notification information carrying the information of the electronic tag sent by the access operation identification antenna in the last preset period, and then calculates the identification times of the second notification information carrying the information of the electronic tag sent by the access operation identification antenna in the current preset period and the time difference value between the identification times corresponding to the cached access operation identification antenna.
Because when the food material of a certain electronic tag in the intelligent refrigerator is taken out, the food material is more and more far away from the storage chamber where the food material is located, the times of detecting the food material of the electronic tag by different powers in a preset period by the access action identification antenna in the intelligent refrigerator are reduced, and the times of reducing are less than a certain first threshold value because the taking-out action is continuous. Similarly, when the food material of a certain electronic tag is stored in the intelligent refrigerator, the food material is closer to the storage chamber into which the food material is put, the number of times that the food material of the electronic tag is detected by the access action recognition antenna in the intelligent refrigerator with different powers in a preset period is increased, and the increased number of times is greater than a certain second threshold value because the stored action is relatively continuous.
Therefore, in the present application, in order to conveniently determine the access state of the food material of each electronic tag, a first logging time threshold, a second logging time threshold, a first fetching time threshold, and a second fetching time threshold are preset. After each number difference value is obtained based on the above embodiment, for each electronic tag, determining a maximum number difference value corresponding to the electronic tag according to the measured number difference value corresponding to each access action identification antenna of the electronic tag; if the identification frequency corresponding to the maximum frequency difference value is greater than a preset first storage frequency threshold value, and the absolute value of the maximum frequency difference value is greater than a preset second storage frequency threshold value, it is indicated that the distance between the food material of the electronic tag and the intelligent refrigerator is closer and closer, and the food material of the electronic tag is already put into the intelligent refrigerator, and the storage and taking state of the food material of the electronic tag is determined to be storage; if the identification frequency corresponding to the maximum frequency difference value is smaller than a preset first taking-out frequency threshold value, and the absolute value of the maximum frequency difference value is larger than a preset second taking-out frequency threshold value, it is indicated that the distance between the food material of the electronic tag and the intelligent refrigerator is longer and longer, and the food material of the electronic tag is not in the intelligent refrigerator, and the access state of the food material of the electronic tag is determined to be taking out.
The first storage time threshold and the second storage time threshold may be the same or different. When setting up, can set up different values according to the difference of scene, if hope in time discerning the state of depositing in of eating the material, this first number of times of depositing threshold value and second deposit the less that number of times threshold value can all set up, if hope avoid the mistake to discern the state of depositing in of eating the material, this first number of times of depositing threshold value and second deposit the more that number of times threshold value can all set up.
Similarly, the first extraction frequency threshold and the second extraction frequency threshold may be the same or different. When setting is carried out, different values can be set according to different scenes, and if the food material taking state is expected to be identified in time, the first taking time threshold is set to be larger, and the second taking time threshold is set to be smaller; if the food material is expected to be prevented from being mistakenly identified, the first taking-out frequency threshold is set to be smaller, and the second taking-out frequency threshold is set to be larger.
In another possible embodiment, when the access state of the food material of each electronic tag is determined, the access state of the food material may also be determined based on the power when the electronic tag of the food material is detected. Specifically, the access action identification antenna is specifically configured to determine second notification information according to different powers and whether information fed back by the electronic tag in the intelligent refrigerator is received under the corresponding power;
the processor 11 is specifically configured to, if at least one access operation identification antenna is installed in the intelligent refrigerator, determine, for each electronic tag carried in the second notification information sent by each access operation identification antenna, a minimum detected power value according to power carried in the second notification information, which carries information of the electronic tag and is sent by the access operation identification antenna in the preset period; determining a power difference value between the minimum detection power value and a minimum detection power value corresponding to the cached access action identification antenna; aiming at each electronic tag, determining a maximum power difference value according to a measured power difference value corresponding to each access action identification antenna of the electronic tag; if the minimum detection power value corresponding to the maximum power difference value is larger than a preset first storage power threshold value, and the absolute value of the maximum power difference value is larger than a preset second storage power threshold value, determining that the access state of the food material of the electronic tag is storage; and if the minimum detection power value corresponding to the maximum power difference value is smaller than a preset first power taking-out threshold value, and the absolute value of the maximum power difference value is larger than a preset second power taking-out threshold value, determining that the access state of the food material of the electronic tag is taken out.
In the practical application process, when the food material of a certain electronic tag in the intelligent refrigerator is taken out, the food material is more and more far away from the storage chamber where the food material is located, the access action identification antenna in the intelligent refrigerator is in two adjacent preset periods, the minimum power required by the food material for detecting the electronic tag is more and more large, when the food material of the certain electronic tag is stored in the intelligent refrigerator, the food material is more and more close to the storage chamber where the food material is placed, and the access action identification antenna in the intelligent refrigerator is in two adjacent preset periods, and the minimum power required by the food material for detecting the electronic tag is more and more small.
Therefore, in order to accurately identify the access state of the food material of each electronic tag, in the present application, the minimum detection power value required for each electronic tag to be identified by each access operation identification antenna in each preset period is cached. Based on the foregoing embodiment, after obtaining the information of each electronic tag carried in the second notification information sent by each access operation identification antenna, the processor 11 obtains, for each electronic tag, the power carried in the second notification information that carries the information of the electronic tag and is sent by the access operation identification antenna, and the minimum detected power value that the access operation identification antenna detects the electronic tag in the last preset period of the cache, and then calculates the power difference between the minimum detected power value that the access operation identification antenna detects the electronic tag in the current preset period and the minimum detected power value that corresponds to the access operation identification antenna in the cache.
Because when the food material of a certain electronic tag in the intelligent refrigerator is taken out, the food material is more and more far away from the storage chamber where the food material is located, the minimum detection power required by the food material detected by the electronic tag in the access action recognition antenna in the intelligent refrigerator is increased in a preset period, and the increased power is less than a certain third threshold value because the taking-out action is continuous. Similarly, when the food material of a certain electronic tag is stored in the intelligent refrigerator, the food material is closer to the storage chamber into which the food material is stored, and the access action recognition antenna in the intelligent refrigerator detects that the minimum detection power required by the food material of the electronic tag is reduced in a preset period, and the reduced power is greater than a certain fourth threshold value because the stored action is relatively continuous.
Therefore, in the present application, in order to determine the access state of the food material of each electronic tag, a first storing power threshold, a second storing power threshold, a first extracting power threshold, and a second extracting power threshold are preset. After each power difference value is obtained based on the embodiment, for each electronic tag, determining the maximum power difference value corresponding to the electronic tag according to the power difference value corresponding to each access action identification antenna of the electronic tag; if the identification power corresponding to the maximum power difference is larger than a preset first storage power threshold value, and the absolute value of the maximum power difference is larger than a preset second storage power threshold value, it is indicated that the distance between the food material of the electronic tag and the intelligent refrigerator is closer and closer, and the food material of the electronic tag is already put into the intelligent refrigerator, and the access state of the food material of the electronic tag is determined to be storage; if the identification power corresponding to the maximum power difference value is smaller than a preset first extraction power threshold value, and the absolute value of the maximum power difference value is larger than a preset second extraction power threshold value, it is indicated that the distance between the food material of the electronic tag and the intelligent refrigerator is longer and longer, and the food material of the electronic tag is not in the intelligent refrigerator, and it is determined that the access state of the food material of the electronic tag is extraction.
The first storage power threshold and the second storage power threshold may be the same or different. When the food storage device is set, different values can be set according to different scenes, if the storage state of food materials is expected to be identified in time, the first storage power threshold value and the second storage power threshold value can be set to be smaller, and if the storage state of the food materials is expected to be prevented from being identified by mistake, the first storage power threshold value and the second storage power threshold value can be set to be larger.
Similarly, the first and second extraction power thresholds may be the same or different. When setting is carried out, different values can be set according to different scenes, and if the food material taking-out state is expected to be identified in time, the first taking-out power threshold value is set to be larger, and the second taking-out power threshold value is set to be smaller; if the food material is expected to be prevented from being mistakenly identified, the first extraction power threshold value is set to be smaller, and the second extraction power threshold value is set to be larger.
In the following, a detailed description is given of a process of managing food materials for an intelligent refrigerator according to a specific embodiment, and fig. 7 is a schematic diagram of a process of managing food materials for an intelligent refrigerator according to some embodiments of the present application, where the process includes:
at least two radio frequency identification antennas 12 and at least one access action identification antenna are installed on the intelligent refrigerator, and the step of S701 is executed for each radio frequency identification antenna 12 and each access action identification antenna:
s701: and detecting the electronic tags of the food materials in the intelligent refrigerator at different preset powers according to a preset period.
For convenience of description, the following description will be given with respect to notification information, which is sent by each rfid antenna 12 and each access operation identification antenna and carries information of the same electronic tag:
s702: the processor 11 counts the target times of receiving the first notification information carrying the information of the electronic tag sent by each radio frequency identification antenna 12 in a preset period, and receives the identification times of receiving the second notification information carrying the information of the electronic tag sent by each access action identification antenna.
Specifically, the counting, by the processor 11, the target times of receiving, in a preset period, the first notification information carrying the information of the electronic tag, sent by each radio frequency identification antenna 12, includes:
receiving each first notification message carrying the information of the electronic tag sent by each radio frequency identification antenna 12; for each rfid antenna 12, the target times of the first notification information carrying the information of the electronic tag sent by the rfid antenna 12 in the preset period is obtained, and then S703 is executed.
Specifically, the counting, by the processor 11, the number of times of receiving, in a preset period, the second notification information carrying the information of the electronic tag sent by each access action identification antenna includes:
the processor 11 receives each second notification message carrying the information of the electronic tag sent by each access action recognition antenna, and for each access action recognition antenna, obtains the number of times of recognition of the second notification message carrying the information of the electronic tag sent by the access action recognition antenna in the preset period, and then knows S707.
S703: and determining the target distance corresponding to each radio frequency identification antenna 12 according to the target times of the first notification information carrying the information of the electronic tag, which is sent by the radio frequency identification antenna 12 in a preset period.
S704: and determining the target vertical distance from the position of the electronic tag to the plane provided with each radio frequency identification antenna 12 according to the measured target distance corresponding to each radio frequency identification antenna 12 of the electronic tag.
S705: and determining the storage room corresponding to the target vertical distance as a target storage room where the food material of the electronic tag is located according to the corresponding relation between the vertical distance and the storage room which are stored in advance.
S706: and acquiring the identification times of the second notification information carrying the electronic tag sent by the access action identification antenna in the current preset period aiming at each access action identification antenna, and determining the time difference value corresponding to the identification times of the access action identification antenna and the cached identification times corresponding to the radio frequency identification antenna 12.
S707: determination of access status.
Fig. 8 is a schematic view of a food material management process provided in some embodiments of the present application, where the process includes:
s801: receiving each first notification message sent by a radio frequency identification antenna in a preset period, wherein the first notification message is determined by the radio frequency identification antenna according to whether a message fed back by an electronic tag in the intelligent refrigerator is received under preset different powers in the preset period.
S802: and determining a target storage chamber where the food material of the electronic tag is located according to the information of the electronic tag carried in the first notification information.
In the application, the food material management method is applied to electronic equipment, and the electronic equipment can be equipment such as an intelligent refrigerator and a processor of a radio frequency identification reader-writer, and can also be a server.
The following describes the food material management method provided by the present application, with an execution subject as a processor of the rfid reader:
the radio frequency identification reader comprises a processor and a radio frequency identification antenna. The processor of the radio frequency identification reader-writer transmits a specific radio frequency signal outwards through the radio frequency identification antenna. When the electronic tag is detected by the radio frequency identification antenna, the electronic tag generates induced current and becomes an activated state, and the information stored in the electronic tag is sent to the radio frequency identification reader-writer through the antenna of the electronic tag; and the processor of the radio frequency identification reader-writer receives the information sent by the electronic tag, demodulates and decodes the information of the electronic tag, and then performs subsequent processing based on the food material management method.
The processor of the radio frequency identification reader-writer is a device for reading or writing information in the electronic tag, and the processor mainly has the functions of controlling the radio frequency identification antenna to transmit radio frequency signals with different powers to the electronic tag, receiving response information of the electronic tag, decoding the information of the electronic tag, and then performing subsequent processing based on the food material management method.
The radio frequency identification antenna is mainly a transmitting/receiving device for transmitting data between the radio frequency identification reader-writer and the electronic tag. The method comprises the steps of detecting electronic tags of food materials in the intelligent refrigerator at different powers according to a preset period, and transmitting radio frequency signals between the electronic tags and a radio frequency identification reader.
For the concepts, explanations, detailed descriptions and other steps related to the food material management method in the present application and related to the technical solutions provided in the embodiments of the present application, please refer to the descriptions of the foregoing methods or other embodiments, which are not repeated herein.
As the radio frequency identification antenna is arranged on the intelligent refrigerator, the radio frequency identification antenna can detect the electronic tags in the intelligent refrigerator according to the preset period and the preset different power, thereby identifying the electronic tags of food materials in different storage chambers in the intelligent refrigerator, determining first notification information according to whether information fed back by the electronic tags in the intelligent refrigerator is received under different powers, sending the first notification information to the processor, so that the subsequent processor determines a target storage chamber where the food material of the electronic tag is located according to the received first notification information carrying the information of the electronic tag sent by the radio frequency identification antenna in the preset period, which is favorable for food material management of the food material in the intelligent refrigerator, and need not the intelligent refrigerator that the structure is too complicated, just can confirm the position of eating the material in the intelligent refrigerator, practiced thrift the cost of manufacture.
Fig. 9 is a schematic structural diagram of a food material management device according to some embodiments of the present application, where the food material management device includes:
the receiving unit 91 is configured to receive each first notification message sent by the radio frequency identification antenna in a preset period, where the first notification message is determined by whether the radio frequency identification antenna receives information fed back by the electronic tag in the intelligent refrigerator at preset different powers in the preset period;
the processing unit 92 is configured to determine, according to the information of the electronic tag carried in the first notification information, a target storage room where the food material of the electronic tag is located.
For the concepts, explanations and detailed descriptions related to the food material management device in the present application and related to the technical solutions of food material management provided in the embodiments of the present application, and other steps please refer to the descriptions of the foregoing methods or other embodiments, which are not repeated herein.
As the radio frequency identification antenna is arranged on the intelligent refrigerator, the radio frequency identification antenna can detect the electronic tags in the intelligent refrigerator according to the preset period and the preset different powers, thereby identifying the electronic tags of food materials in different storage chambers in the intelligent refrigerator, determining first notification information according to whether information fed back by the electronic tags in the intelligent refrigerator is received under different powers, sending the first notification information to the processor, so that the subsequent processor determines a target storage chamber where the food material of the electronic tag is located according to the received first notification information carrying the information of the electronic tag sent by the radio frequency identification antenna in the preset period, which is favorable for food material management of the food material in the intelligent refrigerator, and need not the intelligent refrigerator that the structure is too complicated, just can confirm the position of the edible material in the intelligent refrigerator, practiced thrift the cost of manufacture.
Fig. 10 is a schematic structural diagram of an electronic device according to some embodiments of the present application, and on the basis of the foregoing embodiments, the present application further provides an electronic device, as shown in fig. 10, including: the system comprises a processor 1001, a communication interface 1002, a memory 1003 and a communication bus 1004, wherein the processor 1001, the communication interface 1002 and the memory 1003 are communicated with each other through the communication bus 1004;
the memory 1003 has stored therein a computer program which, when executed by the processor 1001, causes the processor 1001 to perform the steps of:
receiving each piece of first notification information sent by a radio frequency identification antenna in a preset period, wherein the first notification information is determined by the fact that whether information fed back by an electronic tag in the intelligent refrigerator is received or not under preset different power in the preset period by the radio frequency identification antenna;
and determining a target storage chamber where the food material of the electronic tag is located according to the information of the electronic tag carried in the first notification information.
As the principle of solving the problems of the electronic device is similar to that of the food material management method, the implementation of the electronic device can refer to the implementation of the method, and repeated parts are not described again.
The communication bus mentioned in the electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this is not intended to represent only one bus or type of bus.
The communication interface 1002 is used for communication between the electronic device and other devices.
The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Alternatively, the memory may be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a central processing unit, a Network Processor (NP), and the like; but may also be a Digital instruction processor (DSP), an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like.
As the radio frequency identification antenna is arranged on the intelligent refrigerator, the radio frequency identification antenna can detect the electronic tags in the intelligent refrigerator according to the preset period and the preset different powers, thereby identifying the electronic tags of food materials in different storage chambers in the intelligent refrigerator, determining first notification information according to whether information fed back by the electronic tags in the intelligent refrigerator is received under different powers, sending the first notification information to the processor, so that the subsequent processor determines a target storage chamber where the food material of the electronic tag is located according to the received first notification information carrying the information of the electronic tag sent by the radio frequency identification antenna in the preset period, which is favorable for food material management of the food material in the intelligent refrigerator, and need not the intelligent refrigerator that the structure is too complicated, just can confirm the position of the edible material in the intelligent refrigerator, practiced thrift the cost of manufacture.
On the basis of the foregoing embodiments, the present application further provides a computer-readable storage medium, in which a computer program executable by a processor is stored, and when the program is run on the processor, the processor is caused to execute the following steps:
receiving each piece of first notification information sent by a radio frequency identification antenna in a preset period, wherein the first notification information is determined by the fact that whether information fed back by an electronic tag in the intelligent refrigerator is received or not under preset different power in the preset period by the radio frequency identification antenna;
and determining a target storage chamber where the food material of the electronic tag is located according to the information of the electronic tag carried in the first notification information.
For the concepts, explanations, detailed descriptions and other steps related to the technical solutions provided in the embodiments of the present application related to the computer-readable storage medium of the food material management method in the present application, please refer to the descriptions of the foregoing methods or other embodiments, which are not repeated herein.
As the radio frequency identification antenna is arranged on the intelligent refrigerator, the radio frequency identification antenna can detect the electronic tags in the intelligent refrigerator according to the preset period and the preset different power, thereby identifying the electronic tags of food materials in different storage chambers in the intelligent refrigerator, determining first notification information according to whether the information fed back by the electronic tags in the intelligent refrigerator is received under different powers, sending the first notification information to the processor, so that the subsequent processor determines the target storage chamber where the food material of the electronic tag is located according to the received first notification information carrying the information of the electronic tag sent by the radio frequency identification antenna in the preset period, which is beneficial to food material management of the food material in the intelligent refrigerator, and need not the intelligent refrigerator that the structure is too complicated, just can confirm the position of eating the material in the intelligent refrigerator, practiced thrift the cost of manufacture.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application 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, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (7)

1. An intelligent refrigerator, characterized in that the intelligent refrigerator comprises: a radio frequency identification antenna and a processor;
the radio frequency identification antenna is arranged at the top or the bottom of the inner side of the intelligent refrigerator and used for detecting the electronic tags of food materials in the intelligent refrigerator at different preset powers according to a preset period, determining first notification information according to whether information fed back by the electronic tags in the intelligent refrigerator is received at different powers or not, and sending the first notification information to the processor;
the processor is configured to receive each first notification message sent by the radio frequency identification antenna in the preset period; determining a target storage layer where food materials of the electronic tag are located according to first notification information carrying information of the electronic tag;
the processor is specifically configured to acquire, for each electronic tag, a total number of times of first notification information that is sent by the radio frequency identification antenna within the preset period and carries information of the electronic tag; and determining the storage layer corresponding to the total times as a target storage layer where the food material of the electronic tag is located according to the corresponding relation between the pre-stored times and the storage layer.
2. The intelligent refrigerator according to claim 1, wherein the processor is specifically configured to, if at least two rfid antennas are installed, obtain, for each electronic tag carried in the first notification information sent by each rfid antenna, a target number of times of the first notification information sent by the rfid antenna in the preset period and carrying information of the electronic tag; determining a target distance corresponding to the target times according to a corresponding relation between the times and the distances which are stored in advance; for each electronic tag, determining a target vertical distance from the position of the electronic tag to a plane provided with each radio frequency identification antenna according to the measured target distance corresponding to each radio frequency identification antenna of the electronic tag; and determining the storage layer corresponding to the target vertical distance as a target storage layer where the food material of the electronic tag is located according to the corresponding relation between the vertical distance and the storage layer which is stored in advance.
3. The intelligent refrigerator of claim 1, further comprising: an access action recognition antenna;
the access action recognition antenna is arranged on the inner side of the intelligent refrigerator, faces a refrigerator door body, and is used for detecting the electronic tags of food materials in the intelligent refrigerator at preset different powers according to the preset period, determining second notification information according to whether information fed back by the electronic tags in the intelligent refrigerator is received at the different powers, and sending the second notification information to the processor;
the processor is configured to receive each piece of second notification information sent by the access action identification antenna in the preset period, and determine an access state of the food material of the electronic tag according to information of the electronic tag carried in the second notification information.
4. The intelligent refrigerator according to claim 3, wherein the processor is specifically configured to, if the intelligent refrigerator is equipped with at least one access operation recognition antenna, acquire, for each electronic tag carried in second notification information sent by each access operation recognition antenna, the number of times of recognition of the second notification information, which carries information of the electronic tag, sent by the access operation recognition antenna in the preset period, and determine a number difference between the number of times of recognition and the number of times of recognition corresponding to the cached access operation recognition antenna; aiming at each electronic tag, determining the maximum value of the frequency difference according to the measured frequency difference corresponding to each access action identification antenna of the electronic tag; if the identification times corresponding to the maximum time difference are larger than a preset first storage time threshold, and the absolute value of the maximum time difference is larger than a preset second storage time threshold, determining that the access state of the food material of the electronic tag is storage; and if the identification times corresponding to the maximum time difference value are smaller than a preset first taking-out time threshold value, and the absolute value of the maximum time difference value is larger than a preset second taking-out time threshold value, determining that the access state of the food material of the electronic tag is taken out.
5. The intelligent refrigerator according to claim 3, wherein the access action recognition antenna is specifically configured to determine the second notification information according to different powers and whether information fed back by the electronic tag in the intelligent refrigerator is received at the corresponding power;
the processor is specifically configured to determine, for each electronic tag carried in second notification information sent by each access action identification antenna, a minimum detected power value according to a power carried in the second notification information carrying information of the electronic tag sent by the access action identification antenna in the preset period if the intelligent refrigerator is equipped with at least one access action identification antenna; determining a power difference value between the minimum detection power value and the minimum detection power value corresponding to the cached access action identification antenna; aiming at each electronic tag, determining a maximum value of a power difference according to the measured power difference corresponding to each access action identification antenna of the electronic tag; if the minimum detection power value corresponding to the maximum power difference value is larger than a preset first storage power threshold value, and the absolute value of the maximum power difference value is larger than a preset second storage power threshold value, determining that the access state of the food material of the electronic tag is storage; and if the minimum detection power value corresponding to the maximum power difference value is smaller than a preset first extraction power threshold value, and the absolute value of the maximum power difference value is larger than a preset second extraction power threshold value, determining that the access state of the food material of the electronic tag is extraction.
6. A method of food material management, the method comprising:
receiving each piece of first notification information sent by a radio frequency identification antenna in a preset period, wherein the first notification information is determined by the fact that whether information fed back by an electronic tag in the intelligent refrigerator is received or not at preset different power in the preset period by the radio frequency identification antenna; the radio frequency identification antenna is arranged at the top or the bottom of the inner side of the intelligent refrigerator;
determining a target storage layer where food materials of the electronic tag are located according to the information of the electronic tag carried in the first notification information;
wherein, the determining, according to the information of the electronic tag carried in the first notification information, a target storage tier where a food material of the electronic tag is located includes:
acquiring the total times of first notification information which is sent by the radio frequency identification antenna and carries the information of the electronic tag in the preset period aiming at each electronic tag; and determining the storage layer corresponding to the total times as a target storage layer where the food material of the electronic tag is located according to the corresponding relation between the times stored in advance and the storage layer.
7. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by a processor, implements the steps of the food material management method as claimed in claim 6.
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