CN113932530B - Refrigerator and control method thereof - Google Patents
Refrigerator and control method thereof Download PDFInfo
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- CN113932530B CN113932530B CN202110683884.5A CN202110683884A CN113932530B CN 113932530 B CN113932530 B CN 113932530B CN 202110683884 A CN202110683884 A CN 202110683884A CN 113932530 B CN113932530 B CN 113932530B
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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
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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
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
The invention relates to a refrigerator and a control method thereof, wherein the refrigerator comprises: a box body; a box door; a plurality of antennas; a controller configured to: when the condition that the label inventory starting condition is met is determined, controlling the antenna to perform frequency sweep detection on each antenna so as to determine the optimal identification frequency point of each electronic label in the box body corresponding to the antenna from the working frequency interval of the antenna; the optimal identification frequency point is a working frequency point of the antenna when the received signal intensity of the electronic tag is maximum; for each antenna, controlling the antenna to sequentially identify each electronic tag according to the optimal identification frequency point of each electronic tag corresponding to the antenna so as to obtain a tag information set acquired by the antenna; the label information set comprises label information of each electronic label; and managing the food materials according to the label information sets collected by all the antennas. The method has higher tag identification rate and can improve the accuracy of food material management.
Description
Technical Field
The invention relates to the technical field of refrigerators, in particular to a refrigerator and a control method of the refrigerator.
Background
With the development of science and technology, at present, a plurality of refrigerators realize the identification and management of food materials in the refrigerators by arranging RFID antennas in refrigerating chambers, wide temperature chambers and freezing chambers of the refrigerators and reading the food material information stored in different electronic tags. At present, most of readers identify tags by using a random frequency hopping mode within a specified frequency band.
However, in the process of implementing the present invention, the inventor finds that, due to factors such as a metal structure in the refrigerator and moisture of the food material itself, which interfere with transmission of the RFID signal, a certain identification blind spot exists in the existing tag identification process, which results in a low tag identification rate, thereby affecting accuracy of food material management.
Disclosure of Invention
The embodiment of the invention provides a refrigerator and a control method of the refrigerator, which have higher tag identification rate and can improve the accuracy of food material management.
An embodiment of the present invention provides a refrigerator, including:
a case having a storage chamber therein; the food materials in the storage room are identified through electronic tags;
the door is arranged at the opening of the storage chamber;
the plurality of antennas are arranged on the box body;
a controller connected to the antenna and configured to:
when the condition that the label inventory starting condition is met is determined, controlling the antenna to perform frequency sweep detection on each antenna so as to determine the optimal identification frequency point of each electronic label in the box body corresponding to the antenna from the working frequency interval of the antenna; the optimal identification frequency point is a working frequency point of the antenna when the received signal intensity of the electronic tag is maximum;
for each antenna, controlling the antenna to sequentially identify each electronic tag according to the optimal identification frequency point of each electronic tag corresponding to the antenna, so as to obtain a tag information set acquired by the antenna; wherein the tag information set comprises tag information of each electronic tag;
and managing food materials according to the label information sets collected by all the antennas.
As an improvement of the above scheme, the refrigerator further comprises a display device, wherein the display device is arranged on the refrigerator door or the refrigerator body and is used for displaying a food material management interface;
the electronic tag is an RFID temperature tag; the tag information of the electronic tag comprises a tag code, food material information and temperature;
the food material management according to the tag information sets collected by all the antennas comprises the following steps:
determining the average temperature of each electronic tag according to the tag information sets collected by all the antennas;
determining the storage position of each electronic tag according to the average temperature of each electronic tag and the corresponding relation between the preset temperature and the storage position;
and updating the food material management interface according to the food material information and the storage position of the electronic tag.
As an improvement of the above scheme, the tag information of the electronic tag includes a tag code;
after the food material management according to the tag information sets collected by all the antennas, the controller is further configured to:
acquiring the actual number of the stored electronic tags in the box body;
determining the identified number of the stored electronic tags in the box body according to the tag codes of all the electronic tags collected by all the antennas;
and calculating to obtain the label identification rate according to the actual quantity and the identified quantity.
As an improvement of the above scheme, the controlling the antenna to perform frequency sweep detection to determine an optimal identification frequency point of each electronic tag in the box corresponding to the antenna from a working frequency interval of the antenna includes:
controlling the antenna to take frequency points at intervals of a first preset frequency in a working frequency interval of the antenna as working frequency points in sequence, and detecting the received signal strength of each electronic tag to obtain a first corresponding relation between the received signal strength of each electronic tag and the frequency points;
for each electronic tag, selecting a first target frequency point corresponding to the electronic tag when the received signal strength of the electronic tag is maximum from the first corresponding relation of the electronic tag to serve as an optimal identification frequency point of the electronic tag corresponding to the antenna.
As an improvement of the above scheme, after the selecting, from the first corresponding relationship of the electronic tags, a first target frequency point corresponding to the electronic tag when the received signal strength of the electronic tag is the maximum, as an optimal identification frequency point of the electronic tag corresponding to the antenna, for each electronic tag, the method further includes:
for each electronic tag, respectively increasing and decreasing the optimal identification frequency point to a second preset frequency to obtain a first limit value and a second limit value of a secondary search frequency interval of the electronic tag;
for each electronic tag, controlling the antenna to sequentially use the frequency points at every interval of third preset frequency in the secondary search frequency interval as working frequency points, and detecting the received signal strength of the electronic tag to obtain a second corresponding relation between the received signal strength of the electronic tag and the frequency points;
for each electronic tag, selecting a corresponding second target frequency point when the received signal strength of the electronic tag is maximum from the second corresponding relation of the electronic tag, and updating the best identification frequency point of the electronic tag corresponding to the antenna to the second target frequency point.
Correspondingly, an embodiment of the present invention further provides a control method for a refrigerator, which is applied to the refrigerator provided in any one of the above embodiments, and the method includes:
when the condition that the starting condition of the label inventory is met is determined, controlling each antenna arranged in the refrigerator to carry out frequency sweep detection so as to determine the optimal identification frequency point of each electronic label identified on each food material in the box body of the refrigerator corresponding to the antenna from the working frequency interval of the antenna; the optimal identification frequency point is a working frequency point of the antenna when the received signal intensity of the electronic tag is maximum;
for each antenna, controlling the antenna to sequentially identify each electronic tag according to the optimal identification frequency point of each electronic tag corresponding to the antenna, so as to obtain a tag information set acquired by the antenna; wherein the tag information set comprises tag information of each electronic tag;
and managing food materials according to the label information sets collected by all the antennas.
As an improvement of the above scheme, the electronic tag is an RFID temperature tag; the tag information of the electronic tag comprises a tag code, food material information and temperature;
the food material management according to the tag information sets collected by all the antennas comprises the following steps:
determining the average temperature of each electronic tag according to the tag information sets collected by all the antennas;
determining the storage position of each electronic tag according to the average temperature of each electronic tag and the corresponding relation between the preset temperature and the storage position;
and updating the food material management interface displayed on the display device of the refrigerator according to the food material information and the storage position of the electronic tag.
As an improvement of the above scheme, the tag information of the electronic tag includes a tag code;
after the food material management is performed according to the tag information sets collected by all the antennas, the method further comprises the following steps:
acquiring the actual number of the stored electronic tags in the box body;
determining the identified number of the electronic tags stored in the box body according to the tag codes of all the electronic tags collected by all the antennas;
and calculating to obtain the label identification rate according to the actual quantity and the identified quantity.
As an improvement of the above scheme, the controlling the antenna to perform frequency sweep detection so as to determine, from a working frequency interval of the antenna, an optimal identification frequency point of the antenna, corresponding to the electronic tag identified on each food material in the box, includes:
controlling the antenna to sequentially use frequency points at intervals of a first preset frequency in a working frequency interval of the antenna as working frequency points, and detecting the received signal intensity of the electronic tag identified on each food material in the box body to obtain a first corresponding relation between the received signal intensity of each electronic tag and the frequency points;
for each electronic tag, selecting a first target frequency point corresponding to the electronic tag when the received signal strength of the electronic tag is maximum from the first corresponding relation of the electronic tag to serve as an optimal identification frequency point of the electronic tag corresponding to the antenna.
As an improvement of the above scheme, after the selecting, from the first corresponding relationship of the electronic tags, a first target frequency point corresponding to the electronic tag when the received signal strength of the electronic tag is the maximum, as an optimal identification frequency point of the electronic tag corresponding to the antenna, for each electronic tag, the method further includes:
for each electronic tag, respectively increasing and decreasing the optimal identification frequency point to a second preset frequency to obtain a first limit value and a second limit value of a secondary search frequency interval of the electronic tag;
for each electronic tag, controlling the antenna to sequentially use frequency points at every third preset frequency in the secondary search frequency interval as working frequency points, and detecting the received signal strength of the electronic tag to obtain a second corresponding relation between the received signal strength of the electronic tag and the frequency points;
and for each electronic tag, selecting a second target frequency point corresponding to the electronic tag when the received signal strength of the electronic tag is maximum from the second corresponding relation of the electronic tag, and updating the optimal identification frequency point of the electronic tag corresponding to the antenna to the second target frequency point.
Compared with the prior art, the refrigerator and the control method of the refrigerator provided by the embodiment have the following beneficial effects:
the electronic tags in the refrigerator are stored through the multiple antennas, tag identification blind spots in the refrigerator can be effectively eliminated, the optimal identification frequency points of each electronic tag in the refrigerator corresponding to each antenna are obtained through frequency sweep detection, reading and writing of each electronic tag by the antennas are set to the corresponding optimal identification frequency points to identify the tags, reliable identification of the electronic tags can be effectively guaranteed, high tag identification rate is achieved, food material management accuracy can be improved, high tag identification efficiency is achieved, and high efficiency of food material management can be guaranteed.
Drawings
Fig. 1 is a schematic structural view of a refrigerator according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating an operation of a controller in a refrigerator according to an embodiment of the present invention;
fig. 3 is a schematic distribution diagram of storage compartments in a refrigerator according to an embodiment of the present invention;
fig. 4 is a detailed flowchart illustrating an operation of a controller in a refrigerator according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a control method of a refrigerator according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1 and 2, an embodiment of the present invention provides a refrigerator, including:
a box body 1, inside which a storage chamber is arranged; the food materials in the storage room are identified through electronic tags;
the door 2 is arranged at the opening of the storage chamber;
a plurality of antennas 3 arranged on the box body 1;
a controller 4 connected to the antenna 3 and configured to:
s11, when the condition that the label inventory starting condition is met is determined, controlling the antenna 3 to perform frequency sweep detection on each antenna 3, so as to determine the optimal identification frequency point of each electronic label in the box body 1 corresponding to the antenna 3 from the working frequency interval of the antenna 3; the optimal identification frequency point is a working frequency point of the antenna 3 when the received signal intensity of the electronic tag is maximum;
s12, for each antenna 3, controlling the antenna 3 to sequentially identify each electronic tag according to the optimal identification frequency point of each electronic tag corresponding to the antenna 3 so as to obtain a tag information set acquired by the antenna 3; wherein the tag information set comprises tag information of each electronic tag;
and S13, managing food materials according to the label information sets collected by all the antennas 3.
It should be noted that the label inventory starting condition may be that the user completes storage and taking of all food materials carrying the electronic label, or that the refrigerator door 2 of the refrigerator is closed, or that a label inventory instruction sent by the user is received, and the like, which is not limited herein.
It is understood that the cabinet 1 may include one or more storage compartments therein, which is not limited herein. Illustratively, as shown in fig. 3, the refrigerator is a cross four-door refrigerator, which has 5 compartments (containing special spaces), respectively a refrigerating compartment, two adjustable temperature compartments, a freezing compartment and a temperature-changing compartment, and the temperature range of each compartment is different.
It should be noted that the operating frequency interval of each antenna 3 may be preset in the controller 4, so that when the tag inventory is needed, frequency sweep detection may be performed according to the operating frequency interval of each antenna 3, and an optimal identification frequency point corresponding to each antenna 3 for each electronic tag is obtained.
It can be understood that the received signal strength refers to an RSSI absolute value, and a smaller RSSI absolute value of the electronic tag indicates a better signal, that is, it indicates that the working frequency point currently used by the antenna 3 for identifying the electronic tag is more suitable.
In a specific embodiment, considering that too many antennas 3 increase the complexity of system implementation, the number of antennas 3 in this embodiment is set to 4, and multiple antennas 4 may be distributed at different positions of the box body to improve signal coverage.
In the refrigerator provided by this embodiment, because the electronic tags in the refrigerator are stored through the multiple antennas 3, tag identification blind spots in the refrigerator can be effectively eliminated, and in the existing electronic tag identification process, because a random frequency hopping mode is adopted, and each electronic tag has different identification frequency points, it cannot be ensured that the identification frequency points of each electronic tag can be traversed, so that a certain identification blind spot exists, in addition, because the frequency hopping mode is random, even if the working frequency matched with the electronic tag can be hopped, a long time is usually consumed, in this embodiment, each electronic tag in the refrigerator is obtained through frequency sweep detection, which corresponds to the optimal identification frequency point of each antenna 3, and then the reading and writing of each electronic tag by the antennas 3 is set to the corresponding optimal frequency point identification for identifying the electronic tag, so that the reliable identification of the electronic tag can be effectively ensured, thereby having a high tag identification rate, improving the accuracy of food material management, and having high tag identification efficiency, thereby ensuring high efficiency of food material management.
As one optional embodiment, the refrigerator further includes a display device 5, and the display device 5 is disposed on the refrigerator door 2 or the refrigerator body 1 and is configured to display a food material management interface;
the electronic tag is an RFID temperature tag; the tag information of the electronic tag comprises a tag code, food material information and temperature;
the food material management according to the tag information sets collected by all the antennas 3 includes:
determining the average temperature of each electronic tag according to the tag information sets acquired by all the antennas 3;
determining the storage position of each electronic tag according to the average temperature of each electronic tag and the corresponding relation between the preset temperature and the storage position;
and updating the food material management interface according to the food material information and the storage position of the electronic tag.
It can be understood that after the tags are stored in the multi-antenna 3, the read tags and corresponding temperature values are summarized, and if one tag is read by the multiple antennas 3 at the same time, the read temperature is averaged and then used as the temperature of the tag.
It should be noted that, in this embodiment, the storage position may be a compartment position, or may be a drawer position in a compartment, and the like, which is not limited herein. When a user uses the refrigerator to manage food materials, the user often needs to use the electronic tag to classify and position the food materials. However, because the chip of the RFID temperature tag highly integrates a temperature sensing function, the chip power consumption is large, and the tag sensitivity is low, under the antenna 3 array with the same layout, a shorter distance is required for tag temperature reading and tag reading and writing than that of a common tag, which results in low identification reliability.
As one optional implementation, the tag information of the electronic tag includes a tag code;
after the food material management according to the set of tag information collected by all the antennas 3, the controller 4 is further configured to:
acquiring the actual number of the electronic tags stored in the box body 1;
determining the identified number of the electronic tags stored in the box body 1 according to the tag codes of all the electronic tags collected by all the antennas 3;
and calculating to obtain the label identification rate according to the actual quantity and the identified quantity.
It should be noted that the refrigerator may further include a display device 5, the number of the food materials stored in the box body 1 may be increased or deleted through the display device 5 after the user finishes taking and placing each time, and the controller 4 updates the actual number of the electronic tags stored in the box body 1 according to the increase or deletion operation of the user after the increase or deletion operation of the user is performed each time, so as to store the actual number of the electronic tags stored in the box body 1. Furthermore, the refrigerator may further include a camera device disposed in each storage compartment, and the controller 4 may acquire image data in each storage compartment through the camera device and analyze the image data in each storage compartment, so as to obtain the actual number of the electronic tags stored in the box 1. Of course, the controller 4 may also obtain the actual number of the electronic tags stored in the box 1 by other means, which is not limited herein.
In this embodiment, after the tags are stored in the multi-antenna 3, the total number of the identified tags is counted, and the tag identification rate is calculated according to the actual number of the tags put into the refrigerator, so that data support can be provided for the tag identification optimization in the refrigerator.
As one optional implementation manner, the controlling the antenna 3 to perform frequency sweep detection so as to determine, from the working frequency interval of the antenna 3, an optimal identification frequency point of each electronic tag in the box 1, which corresponds to the antenna 3, includes:
controlling the antenna 3 to sequentially use frequency points at intervals of a first preset frequency in a working frequency interval of the antenna 3 as working frequency points, and detecting the received signal strength of each electronic tag to obtain a first corresponding relation between the received signal strength of each electronic tag and the frequency points;
for each electronic tag, selecting a first target frequency point corresponding to the electronic tag when the received signal strength of the electronic tag is the maximum from the first corresponding relation of the electronic tag, so as to serve as the optimal identification frequency point of the electronic tag corresponding to the antenna 3.
Illustratively, the inventory period of each of the antennas 3 may be set to 250ms.
In a specific embodiment, the first predetermined frequency is 10MHz.
In this embodiment, tag identification is performed by controlling each antenna 3 to start from the lowest operating frequency and end from the highest operating frequency within the operating frequency range and using a certain frequency step as an interval, so as to obtain the received signal strength of each electronic tag.
Further, after the selecting, from the first corresponding relationship of the electronic tags, a first target frequency point corresponding to the electronic tag when the received signal strength of the electronic tag is the maximum, as an optimal identification frequency point of the electronic tag corresponding to the antenna 3, the method further includes:
for each electronic tag, respectively adjusting the optimal identification frequency point up and down to a second preset frequency to obtain a first threshold value and a second threshold value of a secondary search frequency interval of the electronic tag;
for each electronic tag, controlling the antenna 3 to sequentially use the frequency point at every interval of third preset frequency in the secondary search frequency interval as a working frequency point, and detecting the received signal strength of the electronic tag to obtain a second corresponding relation between the received signal strength of the electronic tag and the frequency point;
for each electronic tag, selecting a second target frequency point corresponding to the electronic tag when the received signal strength of the electronic tag is maximum from the second corresponding relation of the electronic tag, and updating the optimal identification frequency point of the electronic tag corresponding to the antenna 3 to the second target frequency point.
Illustratively, the first limit value of the secondary search frequency interval refers to an end value of the secondary search frequency interval, and the second limit value refers to a start value of the secondary search frequency interval.
Illustratively, the second predetermined frequency is 5MHz and the third predetermined frequency is 1MHz.
It should be noted that, in this embodiment, a rough-fine search strategy is adopted to search for a frequency point, and after a first target frequency point corresponding to the electronic tag when the received signal strength of the electronic tag is the maximum is found in the first corresponding relationship of the electronic tag, the frequency point is found in an interval near the first target frequency point, so that a more accurate frequency point is obtained, and the accuracy of tag identification and the tag identification rate can be effectively improved.
As a specific example, referring to fig. 4, after the reader/writer is powered on, the following steps may be executed by the controller 4: firstly, setting an initial working antenna 31, checking a storage period of 250ms, checking tags at intervals of 10MHz in a full frequency band range, obtaining approximate frequency points of the tags by comparing RSSI absolute values of the same tag at different frequency points, then checking the tags at intervals of 1MHz in a similar manner at upper and lower 5MHz based on the frequency points obtained for the first time, thereby obtaining the optimal identification frequency point of each tag, then setting the corresponding optimal identification frequency point for reading and writing of each tag by a reader-writer according to the obtained optimal identification frequency point, ensuring that the tag has the best performance, then starting a tag reading instruction, sequentially reading related data such as a temperature value of each tag and the like, switching to the next antenna 3 after the tag reading is confirmed, repeating initialization sweep frequency operation and tag reading operation, summarizing the read tags and corresponding temperature values after the tags are checked by a plurality of antennas 3, averaging the read temperatures to be used as the temperature of the tag after the tag reading is finished, simultaneously counting the total number of the identified tags, and calculating the tag identification rate according to the number of the tags put in the refrigerator.
Referring to fig. 5, fig. 5 is a schematic flowchart of a control method of a refrigerator according to an embodiment of the present invention.
The method for controlling the refrigerator provided by the embodiment can be applied to the refrigerator provided by any one of the embodiments, and the method comprises the following steps:
when the condition that the label inventory starting condition is met is determined, controlling each antenna arranged in the refrigerator to perform frequency sweep detection so as to determine the optimal identification frequency point of each electronic label corresponding to the antenna, wherein the electronic label is identified on each food material in the box body of the refrigerator, from the working frequency interval of the antenna; the optimal identification frequency point is a working frequency point of the antenna when the received signal intensity of the electronic tag is maximum;
for each antenna, controlling the antenna to sequentially identify each electronic tag according to the optimal identification frequency point of each electronic tag corresponding to the antenna, so as to obtain a tag information set acquired by the antenna; wherein the tag information set comprises tag information of each electronic tag;
and managing food materials according to the label information sets collected by all the antennas.
As one of the optional embodiments, the electronic tag is an RFID temperature tag; the tag information of the electronic tag comprises a tag code, food material information and temperature;
the food material management according to the tag information sets collected by all the antennas comprises the following steps:
determining the average temperature of each electronic tag according to the tag information sets collected by all the antennas;
determining the storage position of each electronic tag according to the average temperature of each electronic tag and the corresponding relation between the preset temperature and the storage position;
and updating the food material management interface displayed on the display device of the refrigerator according to the food material information and the storage position of the electronic tag.
As one optional implementation, the tag information of the electronic tag includes a tag code;
after the food material management is performed according to the tag information sets collected by all the antennas, the method further comprises the following steps:
acquiring the actual number of the stored electronic tags in the box body;
determining the identified number of the stored electronic tags in the box body according to the tag codes of all the electronic tags collected by all the antennas;
and calculating to obtain the label identification rate according to the actual quantity and the identified quantity.
As one optional implementation manner, the controlling the antenna to perform frequency sweep detection so as to determine, from an operating frequency interval of the antenna, an optimal identification frequency point of the antenna corresponding to the electronic tag identified on each food material in the box body includes:
controlling the antenna to sequentially use frequency points at intervals of a first preset frequency in a working frequency interval of the antenna as working frequency points, and detecting the received signal intensity of the electronic tag identified on each food material in the box body to obtain a first corresponding relation between the received signal intensity of each electronic tag and the frequency points;
for each electronic tag, selecting a first target frequency point corresponding to the electronic tag when the received signal strength of the electronic tag is maximum from the first corresponding relation of the electronic tag to serve as an optimal identification frequency point of the electronic tag corresponding to the antenna.
Further, after the selecting, from the first corresponding relationship of the electronic tags, a first target frequency point corresponding to the electronic tag when the received signal strength of the electronic tag is the maximum, as an optimal identification frequency point of the electronic tag corresponding to the antenna, for each electronic tag, the method further includes:
for each electronic tag, respectively increasing and decreasing the optimal identification frequency point to a second preset frequency to obtain a first limit value and a second limit value of a secondary search frequency interval of the electronic tag;
for each electronic tag, controlling the antenna to sequentially use frequency points at every third preset frequency in the secondary search frequency interval as working frequency points, and detecting the received signal strength of the electronic tag to obtain a second corresponding relation between the received signal strength of the electronic tag and the frequency points;
for each electronic tag, selecting a corresponding second target frequency point when the received signal strength of the electronic tag is maximum from the second corresponding relation of the electronic tag, and updating the best identification frequency point of the electronic tag corresponding to the antenna to the second target frequency point.
It should be noted that, for the description of the specific processes and the beneficial effects of the control method for the refrigerator provided in this embodiment, reference may be made to the related embodiments of the refrigerator provided above, and details are not repeated herein.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement without inventive effort.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A refrigerator, characterized by comprising:
a case having a storage chamber therein; the food materials in the storage room are identified through electronic tags;
the door is arranged at the opening of the storage chamber;
the plurality of antennas are arranged on the box body;
a controller connected to the antenna, configured to:
when the condition that the label inventory starting condition is met is determined, controlling the antenna to perform frequency sweep detection on each antenna so as to determine the optimal identification frequency point of each electronic label in the box body, which corresponds to the antenna, from the working frequency interval of the antenna; the optimal identification frequency point is a working frequency point of the antenna when the received signal intensity of the electronic tag is maximum;
for each antenna, controlling the antenna to sequentially identify each electronic tag according to the optimal identification frequency point of each electronic tag corresponding to the antenna, so as to obtain a tag information set acquired by the antenna; wherein the tag information set comprises tag information of each electronic tag;
food material management is carried out according to the label information sets collected by all the antennas;
the refrigerator also comprises a display device, wherein the display device is arranged on the refrigerator door or the refrigerator body and is used for displaying a food material management interface;
the electronic tag is an RFID temperature tag; the tag information of the electronic tag comprises a tag code, food material information and temperature;
the food material management according to the tag information sets collected by all the antennas comprises the following steps:
determining the average temperature of each electronic tag according to the tag information sets collected by all the antennas;
determining the storage position of each electronic tag according to the average temperature of each electronic tag and the corresponding relation between the preset temperature and the storage position;
and updating the food material management interface according to the food material information and the storage position of the electronic tag.
2. The refrigerator of claim 1, wherein the tag information of the electronic tag includes a tag code;
after the food material management according to the tag information sets collected by all the antennas, the controller is further configured to:
acquiring the actual number of the stored electronic tags in the box body;
determining the identified number of the stored electronic tags in the box body according to the tag codes of all the electronic tags collected by all the antennas;
and calculating the label identification rate according to the actual quantity and the identified quantity.
3. The refrigerator as claimed in claim 1, wherein the controlling the antenna to perform frequency sweep detection to determine the best identification frequency point of each electronic tag in the box corresponding to the antenna from the operating frequency interval of the antenna comprises:
controlling the antenna to sequentially use frequency points at intervals of a first preset frequency in a working frequency interval of the antenna as working frequency points, and detecting the received signal strength of each electronic tag to obtain a first corresponding relation between the received signal strength of each electronic tag and the frequency points;
for each electronic tag, selecting a first target frequency point corresponding to the electronic tag when the received signal strength of the electronic tag is maximum from the first corresponding relation of the electronic tag to serve as an optimal identification frequency point of the electronic tag corresponding to the antenna.
4. The refrigerator according to claim 3, wherein after the selecting, for each of the electronic tags, a first target frequency point corresponding to the electronic tag having the highest received signal strength from the first corresponding relationship of the electronic tag as the optimal identification frequency point of the electronic tag corresponding to the antenna, the method further comprises:
for each electronic tag, respectively increasing and decreasing the optimal identification frequency point to a second preset frequency to obtain a first limit value and a second limit value of a secondary search frequency interval of the electronic tag;
for each electronic tag, controlling the antenna to sequentially use frequency points at every third preset frequency in the secondary search frequency interval as working frequency points, and detecting the received signal strength of the electronic tag to obtain a second corresponding relation between the received signal strength of the electronic tag and the frequency points;
and for each electronic tag, selecting a second target frequency point corresponding to the electronic tag when the received signal strength of the electronic tag is maximum from the second corresponding relation of the electronic tag, and updating the optimal identification frequency point of the electronic tag corresponding to the antenna to the second target frequency point.
5. A control method of a refrigerator, comprising:
when the condition that the starting condition of the label inventory is met is determined, controlling each antenna arranged in the refrigerator to carry out frequency sweep detection so as to determine the optimal identification frequency point of each electronic label identified on each food material in the box body of the refrigerator corresponding to the antenna from the working frequency interval of the antenna; the optimal identification frequency point is a working frequency point of the antenna when the received signal intensity of the electronic tag is maximum;
for each antenna, controlling the antenna to sequentially identify each electronic tag according to the optimal identification frequency point of each electronic tag corresponding to the antenna, so as to obtain a tag information set acquired by the antenna; wherein the tag information set comprises tag information of each electronic tag;
managing food materials according to the label information sets collected by all the antennas;
the electronic tag is an RFID temperature tag; the tag information of the electronic tag comprises a tag code, food material information and temperature;
the food material management according to the tag information sets collected by all the antennas comprises the following steps:
determining the average temperature of each electronic tag according to the tag information set acquired by all the antennas;
determining the storage position of each electronic tag according to the average temperature of each electronic tag and the corresponding relation between the preset temperature and the storage position;
and updating the food material management interface displayed on the display device of the refrigerator according to the food material information and the storage position of the electronic tag.
6. The control method of a refrigerator according to claim 5, wherein the tag information of the electronic tag includes a tag code;
after the food material management is performed according to the tag information sets collected by all the antennas, the method further comprises the following steps:
acquiring the actual number of the stored electronic tags in the box body;
determining the identified number of the stored electronic tags in the box body according to the tag codes of all the electronic tags collected by all the antennas;
and calculating the label identification rate according to the actual quantity and the identified quantity.
7. The method as claimed in claim 5, wherein the controlling the antenna to perform frequency sweep detection to determine the best identification frequency point of the antenna corresponding to the electronic tag identified on each food material in the box from the operating frequency interval of the antenna comprises:
controlling the antenna to sequentially use frequency points at intervals of a first preset frequency in a working frequency interval of the antenna as working frequency points, and detecting the received signal intensity of the electronic tag identified on each food material in the box body to obtain a first corresponding relation between the received signal intensity of each electronic tag and the frequency points;
for each electronic tag, selecting a first target frequency point corresponding to the electronic tag when the received signal strength of the electronic tag is maximum from the first corresponding relation of the electronic tag to serve as an optimal identification frequency point of the electronic tag corresponding to the antenna.
8. The method as claimed in claim 7, wherein after the selecting a first target frequency point corresponding to the electronic tag with the maximum received signal strength from the first corresponding relationship of the electronic tag for each electronic tag as the optimal identification frequency point of the electronic tag corresponding to the antenna, the method further comprises:
for each electronic tag, respectively increasing and decreasing the optimal identification frequency point to a second preset frequency to obtain a first limit value and a second limit value of a secondary search frequency interval of the electronic tag;
for each electronic tag, controlling the antenna to sequentially use frequency points at every third preset frequency in the secondary search frequency interval as working frequency points, and detecting the received signal strength of the electronic tag to obtain a second corresponding relation between the received signal strength of the electronic tag and the frequency points;
and for each electronic tag, selecting a second target frequency point corresponding to the electronic tag when the received signal strength of the electronic tag is maximum from the second corresponding relation of the electronic tag, and updating the optimal identification frequency point of the electronic tag corresponding to the antenna to the second target frequency point.
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| JP4963237B2 (en) * | 2007-01-24 | 2012-06-27 | 富士通株式会社 | Tag reader |
| WO2009035281A2 (en) * | 2007-09-13 | 2009-03-19 | Lg Electronics Inc. | Refrigerator |
| HK1151182A2 (en) * | 2011-08-22 | 2012-01-20 | First Leadway Ltd | A system and method for controlling and managing medical supplies stored inside medical refrigerator or freezer |
| CN208144784U (en) * | 2017-10-23 | 2018-11-27 | 福建星联科技有限公司 | A kind of novel RFID intelligence cabinet device |
| CN107733472B (en) * | 2017-10-26 | 2021-07-23 | 江苏本能科技有限公司 | Radio frequency identification frequency point self-adaptive setting method and system and control device |
| CN212846861U (en) * | 2020-09-23 | 2021-03-30 | 深圳市创能达电子科技有限公司 | RFID (radio frequency identification) equipment for intelligent refrigerator |
| CN112733889A (en) * | 2020-12-28 | 2021-04-30 | 山东大学 | Perforation plasma arc welding perforation and fusion penetration state identification method based on improved VGG16 deep neural network |
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Address after: 266000 Haixin Avenue, Nancun Town, Pingdu City, Qingdao City, Shandong Province Applicant after: Hisense refrigerator Co.,Ltd. Address before: 266100 Songling Road, Laoshan District, Qingdao, Shandong Province, No. 399 Applicant before: HISENSE (SHANDONG) REFRIGERATOR Co.,Ltd. |
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