CN106568293A - Detection method for food operation of refrigerator, and refrigerator - Google Patents
Detection method for food operation of refrigerator, and refrigerator Download PDFInfo
- Publication number
- CN106568293A CN106568293A CN201610898818.9A CN201610898818A CN106568293A CN 106568293 A CN106568293 A CN 106568293A CN 201610898818 A CN201610898818 A CN 201610898818A CN 106568293 A CN106568293 A CN 106568293A
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- China
- Prior art keywords
- food
- refrigerator
- information
- database
- electronic tag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
- G06K17/0029—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
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- 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
Abstract
The invention provides a detection method for the food operation of a refrigerator, and the refrigerator. The method comprises the following steps: detecting the electronic tags of foods by virtue of radiofrequency identification to obtain the information of the foods, and continuously measuring the signal intensity value of each electronic tag in a time of detecting that a door body of the refrigerator is opened, and calculating the difference value between the measured maximum signal intensity value and minimum signal intensity value during the opening period of the door body; judging whether the difference value is greater than a preset value or not; and if so, determining the foods with the electronic tags to be the operated foods in the door-opening time, and the operated foods comprise the foods taken out from the refrigerator, the foods placed in the refrigerator from the outside and the foods moved in the refrigerator. According to the method disclosed by the invention, the maximum value and the minimum value of the signal intensity of each food tag are acquired in the time of detecting that the door body is opened, the difference value between the maximum value and the minimum value is calculated, and whether the foods are operated or not is judged through the difference value of the signal intensity; and the method is more accurate compared with other detection methods in the prior art.
Description
Technical field
The present invention relates to refrigerator field, the detection method and refrigerator of more particularly to a kind of refrigerator food operation.
Background technology
With the continuous development of society, smart home increasingly becomes an inevitable development trend of family life, refrigerator
Used as the indispensable household appliances of family life, the intellectuality of itself is also imperative.And with RF identification
The research of (Radio Frequency Identification, abbreviation RFID) technology, RFID technique is also progressively applied to intelligence
Can refrigerator art.
At present refrigerator is managed using RFID technique to the food for storing, and is also limited only to refresh refrigerator inside food row
Table simultaneously shows on display module, it is impossible to accomplish the turnover of real Tracking Recognition food.For example, during refrigerator open, which
Article is taken out from refrigerator inside, and which article is that to be put into refrigerator inside and which article from outside be in the refrigerator
Portion moves, and prior art cannot complete above-mentioned judgement only by RFID scanning labels.
In addition, the mode that article the is passed in and out Trend judgement strong and weak also by RFID signal is judged is judged in prior art,
But specific experiment shows, in switch gate, action is very fast, and signal monitoring error is larger, and strong and weak according to signal becomes for user
It is undesirable that gesture judges that article enters artificial situation.
The content of the invention
In view of the above problems, it is proposed that the present invention so as to provide one kind overcome the problems referred to above or at least in part solve on
State the detection method and refrigerator of the refrigerator food operation of problem.
The present invention one further objective is that and judge whether food is user-operably.
Another of the present invention further objective is that and judge whether food introduces/takes out refrigerator by user.
The present invention another further objective is that it is more accurate in order to detect.
According to an aspect of the present invention, the invention provides a kind of refrigerator food operation detection method, including：In inspection
Measure in the time that refrigerator door is unlocked, the electronics that the food using RF identification detection refrigerator inside and near refrigerator is carried
Label is to obtain the information of food, and the signal strength values of test constantly each electronic tag, and calculates during door body is opened,
The maximum signal value for measuring and the difference of minimum signal strength value；Judge difference whether more than default value；If so, sentence
Surely the food with electronic tag is the food operated in this opening time, and the food for being operated includes from refrigerator inside taking
The food for going out, the food for being put into refrigerator inside from outside and the food moved in refrigerator inside.
Alternatively, after the step of judging the food with electronic tag as the food operated in this opening time also
Including：The information for judging each food for being operated whether there is in the first database, and the first data-base recording has in refrigerator
Before door body is unlocked, using RF identification the information of all foods with electronic tag of refrigerator inside for obtaining is detected；If
It is, by the information record of the food for being operated in the second database；If it is not, judging that the food for being operated is put into ice as from outside
Food inside case, and the information of food is added in the first database.
Alternatively, also include after the step food with electronic tag being recorded in the second database：In detection
After being closed to door body, the information for obtaining all foods with electronic tag of refrigerator inside is detected again using RF identification；
Judge that the food information in each second database whether there is in the information aggregate for detecting the food for obtaining again respectively；If
It is the food for judging food to move in refrigerator inside；If it is not, food is judged as the food taken out from refrigerator inside, and
The information of food is deleted from the first database；The first database is corrected and stored so that subsequent detection is used.
Alternatively, the step of detecting all foods with electronic tag of refrigerator inside again using RF identification includes：
Arrange multiple different frequencies carries out repeated detection to food of the refrigerator inside with electronic tag, in case leak-stopping inspection.
Alternatively, the first database is corrected and stored for including the step of subsequent detection is used：It is many using RF identification
The information of secondary food of the detection refrigerator inside with electronic tag；The information aggregate and the first number of the food for obtaining will every time be detected
It is compared according to storehouse；Will be present in food information aggregate and be not present in the first database food information add to first number
According to storehouse；The first database is will be present in, but persistently presets the food information that detection number of times is not appeared in food information set
Delete from the first database；The first database is stored so that subsequent detection is used.
According to a further aspect in the invention, present invention also offers a kind of refrigerator, including：Door body is opened and closed detection module, matches somebody with somebody
It is set to the open and-shut mode of detection refrigerator door；RF identification read module, be configured to detect that refrigerator door is unlocked when
It is interior, detect refrigerator inside and near the electronic tag that carries of food of refrigerator to obtain the information of food, and test constantly is every
The signal strength values of individual electronic tag, and calculate during refrigerator door is opened, the maximum signal value for measuring and minimum
The difference of signal strength values；Message processing module, is configured to, in the case where difference is more than default value, judge to carry electronics mark
The food of label is the food operated in this opening time, and the food for being operated includes the food taken out from refrigerator inside, from
The food that outside is put into the food of refrigerator inside and moves in refrigerator inside.
Alternatively, RF identification read module, was configured to before door body is unlocked, and detection obtains refrigerator inside owns
The information of the food with electronic tag constitutes the first database；Message processing module is configured to, in the food for being operated
In the case that information is present in the first database, by the information record of the food for being operated in the second database, grasped
In the case that the information of the food of work is not present in the first database, judge the food for being operated to be put in refrigerator from outside
The food in portion, and the information of food is added in the first database.
Alternatively, RF identification read module is configured to, and is detecting after door body is closed, and detection again obtains refrigerator
The information of internal all foods with electronic tag；Message processing module is configured to, the food letter in the second database
In the case that breath is present in the information aggregate for detecting the food for obtaining again, judge that food is moved in refrigerator inside
Food, in the case that the food information in the second database is not present in the information aggregate for detect again the food for obtaining,
Food is judged as the food taken out from refrigerator inside, and the information of food is deleted from the first database, and correct and deposit
The first database is stored up so that subsequent detection is used.
Alternatively, RF identification read module is configured to, and arranges multiple different frequencies and carries electronics mark to refrigerator inside
The food of label carries out repeated detection, in case leak-stopping inspection.
Alternatively, RF identification read module is configured to, and repeated detection obtains food of the refrigerator inside with electronic tag
The information of thing；Message processing module is configured to, and will every time detect the information aggregate and first of the food of the refrigerator inside for obtaining
Database is compared, will be present in food information aggregate and the food information that is not present in the first database add to first
Database, will be present in the first database, but persistently preset the food letter that detection number of times is not appeared in food information set
Breath is deleted from the first database.
The invention provides a kind of detection method of refrigerator food operation, including：Detecting what refrigerator door was unlocked
In time, detect the electronic tag that carries of food using RF identification to obtain the information of food, and test constantly each electronics
The signal strength values of label, and calculate during door body is opened, the maximum signal value for measuring and minimum signal strength value
Difference；Judge difference whether more than default value；If so, judge the food with electronic tag as quilt in this opening time
The food of operation, the food for being operated includes the food taken out from refrigerator inside, from outside be put into refrigerator inside food and
In the food that refrigerator inside is moved.Because in the middle of the process that operated in food, its electronic tag to RF identification reads
The distance of module can change, and its signal strength signal intensity also can change with the change of distance, and the method for the present invention is in door body quilt
In the time of unlatching, the maximum and minimum of a value of the signal strength signal intensity of food label are obtained, and calculate its difference, by signal strength signal intensity
Difference judges whether food is operated, and other detection method detections are more accurate in the prior art that compares.
Further, the method for the present invention also judges that the information of each food for being operated whether there is in the first database
In.If the information of the food for being operated is not present in the first database, judge that the food for being operated is put into ice as from outside
Food inside case.
In addition, the method for the present invention also judges respectively that food information in each second database whether there is in examining again
In the information aggregate of the food for measuring；If so, judge that food is the food moved in refrigerator inside；And if it is not, sentence
It is the food taken out from refrigerator inside to determine food.The method of the present invention is counted by being detected to refrigerator inside food and with first
It is compared according to storehouse and the second database, can accurately judges that out by the shape of the action type of operation food or turnover refrigerator
State.
Further, after door body is closed, again detection acquisition refrigerator inside is all with electronic tag for the present invention
Food information during, RF identification read module arranges multiple different frequencies to refrigerator inside with electronic tag
Food carries out repeated detection, in case leak-stopping inspection.Because the identification frequency of different electronic tags may be different, therefore know in radio frequency
When other read module is identified to electronic tag, multiple operating center frequencies are set, at each of the frequencies to electronic tag
Once recognized, the result for recognizing each time is collected, obtained the information aggregate of refrigerator inside food, improve detection
Accuracy.
According to the detailed description below in conjunction with accompanying drawing to the specific embodiment of the invention, those skilled in the art will be brighter
Above-mentioned and other purposes, the advantages and features of the present invention.
Description of the drawings
Describe some specific embodiments of the present invention in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter.
Identical reference denotes same or similar part or part in accompanying drawing.It should be appreciated by those skilled in the art that these
What accompanying drawing was not necessarily drawn to scale.In accompanying drawing：
Fig. 1 is the schematic appearance of refrigerator according to an embodiment of the invention；
Fig. 2 is the structured flowchart of refrigerator according to an embodiment of the invention；
Fig. 3 is the schematic diagram of the detection method of refrigerator food operation according to an embodiment of the invention；
Fig. 4 is the flow chart of the detection method of refrigerator food operation according to an embodiment of the invention；And
Fig. 5 is the flow chart of the detection method of refrigerator food operation in accordance with another embodiment of the present invention.
Specific embodiment
The present embodiment provide firstly a kind of refrigerator, the schematic appearance of Fig. 1 refrigerators according to an embodiment of the invention,
Fig. 2 is the structured flowchart of refrigerator according to an embodiment of the invention, and the refrigerator includes：Door body 10, door body is opened and closed detection module
20th, RF identification read module 30 and message processing module 40.
Door body opening and closing detection module 20 detects the open and-shut mode of refrigerator door 10, the detection mould of door body opening and closing in the present embodiment
Block 20 can include pressure sensor, and the pressure size that pressure sensor can be according to suffered by itself sends the electricity of varying strength
Signal.Pressure sensor may be mounted on the contact surface of refrigerator body and door body 10, when door body 10 is opened and closed, pressure
The pressure that sensor is experienced is different, and by sending the electric signal of varying strength to refrigerator master control borad opening for door body 10 is determined
Closed state.
RF identification read module 30 detecting in the time that refrigerator door 10 is unlocked, detection refrigerator inside and close
The electronic tag that the food of refrigerator is carried is to obtain the information of food, and the signal strength values of test constantly each electronic tag,
And calculate during refrigerator door 10 is opened, the maximum signal value for measuring and the difference of minimum signal strength value.
Radio frequency discrimination RFID (Radio Frequency Identification) technology is a kind of communication technology, can be passed through
Radio signals identification specific objective simultaneously reads and writes related data, and without the need for setting up machinery or light between identifying system and specific objective
Learn contact.Its most important advantage is contactless identification, and it can penetrate snow, mist, ice, coating, dust and dirt and bar code and cannot use
Adverse circumstances label reading, and reading rate is exceedingly fast, in most cases less than 100 milliseconds.Therefore, in intelligent refrigerator
RFID technique has huge application prospect, and unforeseen huge space can be brought to the intellectuality of refrigerator.
In refrigerator field, can be by configuring RFID on refrigerator, to realize producing, transport, using process
In management and control to refrigerator；Rfid interrogator 30 can be also configured on refrigerator, on storage food electronic tag is configured, realize refrigerator
Intelligent management to food.The electronic tag configured on storage food can include title, species, date of manufacture, the guarantor of food
The essential information of the various foods such as matter phase, weight.
In the present embodiment, RF identification read module 30 can include rfid interrogator 30, and rfid interrogator 30 can be with
The front side of refrigerator door 10 is arranged at, and rfid interrogator 30 has certain detection range, in the hand-held food of user near refrigerator
And prepare just to be able to detect that electronic tag when being put into refrigerator inside, and label information is read, while rfid interrogator 30 also can
Enough read the electronic tag of all foods of refrigerator inside.The rfid interrogator 30 of the present embodiment can also in real time measure electronic tag
Signal strength signal intensity, because in the middle of the process that operated in food, the distance of its electronic tag to rfid interrogator 30 can become
Change, its signal strength signal intensity also can change with the change of distance, it is however generally that, electronic tag to the distance of rfid interrogator 30 is got over
Far, its signal strength signal intensity is weaker.For example, if food taken out by refrigerator inside, the signal strength signal intensity of electronic tag can be by dying down by force.
Rfid interrogator 30 within the time that door body 10 is unlocked, can also obtain the maximum and minimum of the signal strength signal intensity of food label
Value, and calculate its difference.
Message processing module 40 judges the food with electronic tag as this in the case where difference is more than default value
The food operated in opening time, the food for being operated includes the food taken out from refrigerator inside, is put in refrigerator from outside
The food in portion and the food moved in refrigerator inside.
The refrigerator of the present embodiment determines whether food is operated by above-mentioned signal difference.When certain food position occur it is bright
When aobvious mobile, for example, take out from refrigerator inside, be put into refrigerator inside from outside or moved in addition by a compartment of refrigerator
One compartment, above-mentioned difference can be more than default value, now judge the food and operated when opening door body 10 for this user
Food；When certain food position is not moved or is only to carry out minute movement in same chamber interior, above-mentioned difference
Value can be less than or equal to default value, now judge that the food is that this user opens the food not operated during door body 10.On
Stating default value can be set according to the concrete set location of rfid interrogator 30 and model of refrigerator size.
Table 1 is that inventor carries out the experimental data that different operating is recorded on same refrigerator for different foods.
In this experiment, inventor has carried out different types of operation to food, during operating each time, chooses 7 time points
The signal strength signal intensity of the electronic tag of food is measured (unit of signal strength data is dBm in table).In this experiment, in advance
If numerical value chooses 10dBm.
Table 1
After obtaining the data of 7 time points, maximum signal level therein and minimum signal value are chosen, and calculate both differences
Value.Certainly, in order that experimental data is more accurate, in other test, it is also possible to which the time point more than 7 is set, and
Maximum signal level therein and minimum signal value are chosen with calculating difference.We can see that from table if food is operated
(moving in refrigerator or in refrigerator inside including taking out from refrigerator, being put into), its difference is more than default value, and if food
Thing is not operated, and its difference is less than default value.Therefore, the experiment confirm using signal strength difference judge food whether by
The feasibility of operation.
The refrigerator of the present embodiment can also include display screen 50, and display screen 50 is arranged at the front side of refrigerator door 10, above-mentioned true
The fixed food title for being operated can be displayed in the form of a list on display screen 50, to facilitate user to check.
In the present embodiment, also before door body 10 is unlocked, detection obtains refrigerator inside to RF identification read module 30
The information of all foods with electronic tag constitutes the first database.Door body 10 is detected in door body opening and closing detection module 20 to open
Before opening, RF identification read module 30 carries out one-time detection to all electronic tags of refrigerator inside, and all by what is detected
Food information constitutes the first database.
Message processing module 40 also in the case where the information of the food for being operated is present in the first database, will be grasped
The information record of the food of work is in the second database.The feelings being not present in the information of the food for being operated in the first database
Under condition, judge that the food for being operated is the food that refrigerator inside is put into from outside, and the information of food is added to into the first data
In storehouse.
The above-mentioned food for being operated includes the food taken out from refrigerator inside, from outside be put into refrigerator inside food and
In the food that refrigerator inside is moved.If the information of the food for being operated is present in the first database, it was demonstrated that the food
Just Already in refrigerator inside before this opens door body 10 in user, the food belong to the food that refrigerator inside takes out or
The food that refrigerator inside is moved.If the information of the food for being operated is not present in the first database, it was demonstrated that the food
In user, this is not present in refrigerator inside before opening door body 10, and the food belongs to from outside and is put into the food of refrigerator inside.
Above-mentioned RF identification read module 30 is also being detected after door body 10 is closed, and detection again obtains refrigerator inside institute
There is the information of the food with electronic tag.
Message processing module 40 is configured to, and the food information in the second database is present in and detects the food for obtaining again
In the case of in the information aggregate of thing, food is judged as the food moved in refrigerator inside, the food in the second database
In the case that thing information is not present in the information aggregate for detect again the food for obtaining, food is judged to take out from refrigerator inside
Food, and the information of food is deleted from the first database, and correct and store the first database for subsequent detection
Use.
As described above, the food taken out comprising refrigerator inside in the second database and move in refrigerator inside
Food information.Judge that the food information in each second database whether there is in the information aggregate for detecting the food for obtaining again
In, if certain food is present in the information aggregate of above-mentioned food, it was demonstrated that after door body 10 is closed, the food is present in refrigerator
Portion, is the food moved in refrigerator inside, if another food is not present in the information aggregate of above-mentioned food, it was demonstrated that door
After body 10 is closed, the food has been moved off refrigerator inside, and the food is the food taken out from refrigerator inside.The quilt of above-mentioned determination
The food title of operation and action type can be displayed in the form of a list on display screen 50, to facilitate user to check, example
Such as：Food A is the food that this is put in refrigerator；Food B is the food that this takes out from refrigerator inside；Food C is in refrigerator
Portion is moved etc..
After door body 10 is closed, detection again obtains the mistake of the information of all foods with electronic tag of refrigerator inside
Cheng Zhong, RF identification read module 30 can arrange multiple different frequencies to refrigerator inside with electronic tag food carry out it is many
Secondary detection, in case leak-stopping inspection.Because the identification frequency of different electronic tags may be different, therefore in 30 pairs of electricity of rfid interrogator
When subtab is identified, multiple operating center frequencies are set, electronic tag is once recognized at each of the frequencies, will
The result for recognizing each time is collected, and obtains the information aggregate of refrigerator inside food.For example, rfid interrogator 30 is adjusted to
One frequency, detects to food of the refrigerator inside with electronic tag, has obtained the information of tri- kinds of food of A, B, C, and RFID reads
Write device 30 to adjust again to second frequency, food of the refrigerator inside with electronic tag is detected again, obtain two kinds of D, E
The information of food, then, the information aggregate of the refrigerator inside food for getting finally is detected again includes five kinds of foods of A to E
Information.
In the present embodiment, arrange two operating center frequencies to detect electronic tag, above-mentioned two work centre
Frequency is respectively 921.375MHz and 922.125MHz.
After all action types by operation food determine, the also repeated detection of RF identification read module 30 obtains ice
The information of food of the case inside with electronic tag.
Message processing module 40 will also every time detect the information aggregate and the first database of the food of the refrigerator inside for obtaining
Be compared, will be present in food information aggregate and the food information that is not present in the first database add to the first data
Storehouse, will be present in the first database, but persistently preset food information that detection number of times do not appeared in food information set from
Delete in first database.
In the present embodiment, after all action types by operation food determine, the first database can also be entered
Row is further corrected, the electronic tag of the repeated detection refrigerator inside food of rfid interrogator 30, if a certain food information is deposited
Be above-mentioned rfid interrogator 30 detection obtain food information aggregate in and be not present in the first database, it was demonstrated that the food
For missing inspection food, the first database is added it to.Persistently presetting in the detection process of detection number of times, if the first database
In certain food information do not appear in the information aggregate of above-mentioned food always, it was demonstrated that the food is taken out, by its information
Delete from the first database.The information that above-mentioned revised first database contains all foods in current refrigerator is carried out,
Use for detecting next time.
The present embodiment additionally provides a kind of detection method of refrigerator food operation, and Fig. 3 is according to one embodiment of the invention
Refrigerator food operation detection method schematic diagram, the method be used for judge whether food is operated, it includes：
Step S302, detecting in the time that refrigerator door 10 is unlocked, using RF identification detection refrigerator inside and
Near the electronic tag that carries of food of refrigerator obtaining the information of food.Above-mentioned detected food is included in refrigerator inside
All foods, and user will be put into the food in refrigerator, when the hand-held food with electronic tag of user is near refrigerator,
Rfid interrogator 30 just can obtain the information of electronic tag.
Step S304, the signal strength values of test constantly each electronic tag, and calculate during door body 10 is opened, measurement
The maximum signal value for arriving and the difference of minimum signal strength value.In the present embodiment, during the unlatching of door body 10, every pre-
If the time is once gathered to the signal strength values of each electronic tag, obtain multiple data in pick out maximum and
Minimum of a value, and seek its difference.Due in the middle of the process that operated in food, the distance meeting of its electronic tag to rfid interrogator 30
Change, its signal strength signal intensity also can change with the change of distance, it is however generally that, electronic tag is to rfid interrogator 30
Distance is more remote, and its signal strength signal intensity is weaker.
Whether step S306, judge above-mentioned difference more than default value.Refrigerator determines that food is by above-mentioned signal difference
It is no to be operated.
Step S308, if the judged result of step S308 is yes, when judging that the food with electronic tag opens the door as this
The interior food for being operated.When certain food position occurs apparent motion, for example, take out from refrigerator inside, from outside ice is put into
Case inside moves to another compartment by a compartment of refrigerator, and above-mentioned difference can be more than default value, now judge
The food is that this user opens the food operated during door body 10.
Step S310, if the judged result of step S308 is no, when judging that the food with electronic tag opens the door as this
The interior food not operated.When certain food position is not moved or be only in same chamber interior to carry out small shifting
When dynamic, above-mentioned difference can be less than or equal to default value, now judge the food and do not grasped when opening door body 10 for this user
The food of work.Above-mentioned default value can be set according to the concrete set location of rfid interrogator 30 and model of refrigerator size
It is fixed.
Fig. 4 is the flow chart of the detection method of refrigerator food operation according to an embodiment of the invention, and the method is used for
Judge by the concrete operations type of operation food, aforesaid operations type includes taking out food from refrigerator, is put into food to refrigerator inside
Thing, food is moved in refrigerator inside, the method performs successively following steps：
Step S402, using RF identification the information group of all foods with electronic tag of refrigerator inside for obtaining is detected
Into the first database.
Whether step S404, detection door body 10 is unlocked.Door body opening and closing detection module 20 detects the opening and closing of refrigerator door 10
State, the detection module 20 of door body opening and closing in the present embodiment can include pressure sensor, and pressure sensor can be according to itself
Suffered pressure size sends the electric signal of varying strength.Pressure sensor may be mounted at connecing for refrigerator body and door body 10
In contacting surface, when door body 10 is opened and closed, the pressure that pressure sensor is experienced is different, by sending to refrigerator master control borad
The electric signal of varying strength is determining the open and-shut mode of door body 10.
Step S406, within the time that door body 10 is unlocked, using RF identification detect the electronic tag that carries of food with
Obtain the information of food.
Step S408, the signal strength values of test constantly each electronic tag, and calculate during door body 10 is opened, measurement
The maximum signal value for arriving and the difference of minimum signal strength value.
Whether step S410, judge difference more than default value.
Step S412, if the judged result of step S410 is yes, when judging that the food with electronic tag opens the door as this
The interior food for being operated.
Step S414, if the judged result of step S410 is no, when judging that the food with electronic tag opens the door as this
The interior food not operated.
Step S416, the information for judging the food for being operated is present in the first database.
Step S418, if the judged result of step S416 is yes, by the information record of the food for being operated in the second data
In storehouse.If the information of the food for being operated is present in the first database, it was demonstrated that in user, this opens door body 10 to the food
Just Already in refrigerator inside before, the food belongs to the food that refrigerator inside is taken out or the food moved in refrigerator inside
Thing.
Step S420, judges that the food for being operated is the food that refrigerator inside is put into from outside, and the information of food is added
In being added to the first database.If the information of the food for being operated is not present in the first database, it was demonstrated that the food is in user
This to be opened and be not present in refrigerator inside before door body 10, and the food belongs to from outside and is put into the food of refrigerator inside.
Whether step S422, detection door body 10 is closed.
Step S424, if the judged result of step S422 is yes, using RF identification acquisition refrigerator inside institute is detected again
There is the information of the food with electronic tag.Again after detecting that packet this operation containing user of the food of acquisition terminates, ice
The food that case inside is placed.In above-mentioned detection process, RF identification read module 30 can arrange multiple different frequencies to ice
Food of the case inside with electronic tag carries out repeated detection, in case leak-stopping inspection.Because the identification frequency of different electronic tags can
Can be different, therefore when rfid interrogator 30 is identified to electronic tag, multiple operating center frequencies are set, in each frequency
Electronic tag is once recognized under rate, the result for recognizing each time is collected, obtained after user operation in refrigerator
The information aggregate of portion's food.
Step S426, judges that the food information in the second database whether there is in the information aggregate for detecting again.
Step S428, if the judged result of step S426 is yes, judges food as the food moved in refrigerator inside
Thing..If certain food is present in the information aggregate of the above-mentioned food for detecting again, it was demonstrated that after door body 10 is closed, the food
Thing is present in refrigerator inside, is the food moved in refrigerator inside.
Step S430, if the judged result of step S426 is no, judges food as the food taken out from refrigerator inside, and will
The information of food is deleted from the first database.If certain food is not present in the information aggregate of above-mentioned food, it was demonstrated that door body
After 10 are closed, the food has been moved off refrigerator inside, and the food is the food taken out from refrigerator inside.
So far, refrigerator inside is operated the concrete operations type of food to obtain clearly.All by operation food
After action type determines, the first database can also further be corrected, while preserving revised first data
Storehouse uses for subsequent detection.
Fig. 5 is the flow chart of the detection method of refrigerator food operation in accordance with another embodiment of the present invention, and the method is used
In further being corrected to the first database, the method performs successively following steps：
Step S502, using the information of food of the RF identification repeated detection refrigerator inside with electronic tag.
Step S504, will every time detect that the information aggregate of the food for obtaining and the first database are compared.
Step S506, will be present in food information aggregate and the food information that is not present in the first database add to
One database.If a certain food information be present in above-mentioned rfid interrogator 30 detection obtain food information aggregate in and not
It is present in the first database, it was demonstrated that the food is missing inspection food, adds it to the first database.
Step S508, will be present in the first database, but persistently default detection number of times does not appear in food information set
In food information delete from the first database.Persistently presetting in the detection process of detection number of times, if the first database
In certain food information do not appear in the information aggregate of above-mentioned food always, it was demonstrated that the food is taken out, by its information
Delete from the first database, above-mentioned default detection number of times for example can be able to be 10 by user's sets itself.Such as first
In secondary detection process, the A foods being not detected by the first database, then the undetected number of times of A foods increase by 1 by 0, when carrying out
When the tenth detection, the undetected number of times of A foods increases to 10, and (that is continuous 10 detections are and detect A foods
Thing), then assert that refrigerator inside has not had A foods, the information of A foods is deleted from the first database.
The information that above-mentioned revised first database contains all foods in current refrigerator is carried out, for examining next time
Survey is used.
A kind of detection method of refrigerator food operation is present embodiments provided, including：Opened refrigerator door 10 is detected
In the time opened, detect the electronic tag that carries of food using RF identification to obtain the information of food, and test constantly each
The signal strength values of electronic tag, and calculate during door body 10 is opened, the maximum signal value for measuring and minimum signal
The difference of intensity level；Judge difference whether more than default value；When if so, judging that the food with electronic tag opens the door as this
The interior food for being operated, the food for being operated includes the food taken out from refrigerator inside, and from outside the food of refrigerator inside is put into
Thing and the food moved in refrigerator inside.Because in the middle of the process that operated in food, its electronic tag to radio frequency is known
The distance of other read module 30 can change, and its signal strength signal intensity also can change with the change of distance, the side of the present embodiment
Method obtains the maximum and minimum of a value of the signal strength signal intensity of food label within the time that door body 10 is unlocked, and calculates its difference,
Judge whether food is operated by signal strength difference, other detection method detections are more accurate in the prior art that compares.
Further, the method for the present embodiment also judges that the information of each food for being operated whether there is in the first data
In storehouse.If the information of the food for being operated is not present in the first database, judge the food for being operated to be put into from outside
The food of refrigerator inside.
In addition, the method for the present embodiment also judges respectively that the food information in each second database whether there is in again
In the information aggregate of the food that detection is obtained；If so, judge that food is the food moved in refrigerator inside；And if it is not,
Food is judged as the food taken out from refrigerator inside.The method of the present embodiment to refrigerator inside food by being detected and with
One database and the second database are compared, and can accurately judge that out by the action type of operation food or pass in and out refrigerator
State.
Further, after door body 10 is closed, again detection acquisition refrigerator inside is all with electronics for the present embodiment
During the information of the food of label, RF identification read module 30 arranges multiple different frequencies and carries electronics to refrigerator inside
The food of label carries out repeated detection, in case leak-stopping inspection.Because the identification frequency of different electronic tags may be different, therefore
When RF identification read module 30 is identified to electronic tag, multiple operating center frequencies are set, it is right at each of the frequencies
Electronic tag once recognized, the result for recognizing each time collected, and obtains the information aggregate of refrigerator inside food, is carried
The high accuracy of detection.
So far, although those skilled in the art will appreciate that detailed herein illustrate and describe multiple showing for the present invention
Example property embodiment, but, without departing from the spirit and scope of the present invention, still can be direct according to present disclosure
It is determined that or deriving many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all these other variations or modifications.
Claims (10)
1. the detection method that a kind of refrigerator food is operated, including：
Detecting in the time that the refrigerator door is unlocked, the refrigerator inside is being detected and near described using RF identification
The electronic tag that the food of refrigerator is carried is to obtain the information of the food, and the signal of test constantly each electronic tag
Intensity level, and calculate during the door body is opened, the maximum signal value for measuring and the difference of minimum signal strength value；
Judge the difference whether more than default value；
If so, judge that the food with the electronic tag is the food that operated in this opening time, it is described to be operated
Food includes the food taken out from the refrigerator inside, and the food of the refrigerator inside is put into and in the refrigerator from outside
The food that portion moves.
2. method according to claim 1, where it is determined that the food with the electronic tag is in this opening time
Also include after the step of food for being operated：
The information for judging each food for being operated whether there is in the first database, and first data-base recording has
Before the refrigerator door is unlocked, detect that the refrigerator inside for obtaining is all with the electronics mark using RF identification
The information of the food of label；
If so, by the information record of the food for being operated in the second database；
If it is not, judge the food for being operated as the food that the refrigerator inside is put into from outside, and by the letter of the food
Breath is added in first database.
3. method according to claim 2, wherein the food with electronic tag is recorded in the second database
The step of after also include：
Detecting after the door body is closed, detecting that the acquisition refrigerator inside is all with described again using RF identification
The information of the food of electronic tag；
Judge food information in each described second database with the presence or absence of in detecting the food that obtains again respectively
In information aggregate；
If so, judge that the food is the food moved in the refrigerator inside；
If it is not, judge that the food is the food taken out from the refrigerator inside, and by the information of the food from described first
Delete in database；
First database is corrected and stored so that subsequent detection is used.
4. method according to claim 3, wherein having detected all bands of the refrigerator inside again using RF identification
The step of food for stating electronic tag, includes：
Arrange multiple different frequencies carries out repeated detection to food of the refrigerator inside with the electronic tag, in case leak-stopping
Inspection.
5. method according to claim 3, wherein correcting and storing first database so that subsequent detection is used
Step includes：
Using the information of food of the refrigerator inside described in RF identification repeated detection with the electronic tag；
To every time detect that the information aggregate of the food for obtaining and first database are compared；
The information aggregate that will be present in the food and the food information that is not present in first database add to described
One database；
First database is will be present in, but persistently presets the food that detection number of times is not appeared in the food information set
Thing information is deleted from first database；
First database is stored so that subsequent detection is used.
6. a kind of refrigerator, including：
Door body is opened and closed detection module, is configured to detect the open and-shut mode of the refrigerator door；
RF identification read module, is configured to detecting in the time that the refrigerator door is unlocked, and detects in the refrigerator
Portion and near the electronic tag that carries of food of the refrigerator to obtain the information of the food, and test constantly each described electricity
The signal strength values of subtab, and calculate during the refrigerator door is opened, the maximum signal value for measuring and minimum
The difference of signal strength values；With
Message processing module, is configured to, in the case where the difference is more than default value, judge with the electronic tag
Food is the food operated in this opening time, and the food for being operated includes the food taken out from the refrigerator inside
Thing, the food for being put into the refrigerator inside from outside and the food moved in the refrigerator inside.
7. refrigerator according to claim 6, wherein
The RF identification read module, was configured to before the door body is unlocked, and detection obtains the refrigerator inside institute
First database is constituted by the information of the food with the electronic tag；
Described information processing module is configured to, and is present in first database in the information of the food for being operated
In the case of, by the information record of the food for being operated in the second database, the food for being operated information not
In the case of being present in first database, judge that the food for being operated is put into the refrigerator inside as from outside
Food, and the information of the food is added in first database.
8. refrigerator according to claim 7, wherein
The RF identification read module is configured to, and is detecting after the door body is closed, and detection again obtains the ice
The information of all foods with the electronic tag in case inside；
Described information processing module is configured to, and the food information in second database is present in what detection again was obtained
In the case of in the information aggregate of the food, judge that the food is the food moved in the refrigerator inside, in institute
State in the case that the food information in the second database is not present in the information aggregate for detect again the food for obtaining, sentence
The fixed food is the food taken out from the refrigerator inside, and the information of the food is deleted from first database
Remove, and correct and store first database so that subsequent detection is used.
9. refrigerator according to claim 8, wherein
The RF identification read module is configured to, and arranges multiple different frequencies and carries the electronics mark to the refrigerator inside
The food of label carries out repeated detection, in case leak-stopping inspection.
10. refrigerator according to claim 8, wherein
The RF identification read module is configured to, and repeated detection obtains food of the refrigerator inside with the electronic tag
The information of thing；
Described information processing module is configured to, and will every time detect information aggregate and the institute of the food of the refrigerator inside for obtaining
State the first database to be compared, will be present in the information aggregate of the food and be not present in the food of first database
Information is added to first database, will be present in first database, but persistently default detection number of times is not appeared in
Food information in the food information set is deleted from first database.
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