CN107477970B - Refrigerator door opening control method and refrigerator adopting same - Google Patents
Refrigerator door opening control method and refrigerator adopting same Download PDFInfo
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- CN107477970B CN107477970B CN201710625750.1A CN201710625750A CN107477970B CN 107477970 B CN107477970 B CN 107477970B CN 201710625750 A CN201710625750 A CN 201710625750A CN 107477970 B CN107477970 B CN 107477970B
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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
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/04—Sensors detecting the presence of a person
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Abstract
The invention provides a refrigerator door opening control method and a refrigerator adopting the same. The door opening control method comprises the steps of judging that a user approaches the refrigerator; further judging that the user enters a door opening detection area; controlling the infrared array sensor to detect to obtain corresponding detection data, subtracting the detection data obtained by the previous detection to obtain a group of difference values, counting the number N of the difference values larger than 0 in the group of difference values, and if the P1 is not less than N/M N is not less than P2, judging that the user wants to execute a door opening action; controlling the infrared array sensor to carry out multiple detections, and judging whether the abscissa and/or the ordinate of the point position with the largest numerical value in each group of detection data meet an increasing or decreasing relationship; if yes, controlling to open the door. The method breaks away from the limitation of a touch screen and a key, intelligently identifies whether the user needs to open the door or not, and improves the use experience.
Description
Technical Field
The invention relates to the technical field of automatic control of household appliances, in particular to a refrigerator door opening control method and a refrigerator adopting the method.
Background
With the continuous promotion and development of intellectualization and humanization in the field of household appliances, the refrigerator is taken as a necessity in daily life, and the market puts higher requirements on the functions, intelligent control and the like of the refrigerator. In the actual use process, a user sometimes cannot conveniently and directly operate and open the refrigerator door body, and a voice control technology, an air-isolated multi-point touch technology, a gesture control technology and the like are disclosed in the industry for achieving the purposes. The gesture control technology is more convenient to control and more suitable for the natural interaction habit of users, and is taken as an important direction for research of the intelligent refrigerator control method. However, the traditional gesture recognition algorithm is complex, has large data interaction and processing amount, unstable performance and high requirements on equipment hardware, and cannot be generally applied for a while.
In view of the above, it is necessary to provide a new door opening control method for a refrigerator and a refrigerator using the same.
Disclosure of Invention
The invention aims to provide a door opening control method of a refrigerator and the refrigerator adopting the method, which are free from the limitation of a touch screen and a key, can correctly identify whether a user needs to open a door, and have the advantages of simple data algorithm, low hardware requirement and low implementation cost.
In order to achieve the above object, the present invention provides a door opening control method for a refrigerator, the refrigerator having a control module and an infrared array sensor for detecting a front area of the refrigerator, the dimension of the infrared array sensor being set to M × N, the door opening control method comprising:
the refrigerator is started to operate, and whether a user approaches the refrigerator or not is judged;
judging that a user approaches the refrigerator, controlling the infrared array sensor to perform first detection on an area in front of the refrigerator to obtain a first group of detection data, performing second detection after a set first time length T1 to obtain a second group of detection data, subtracting the first group of detection data from the second group of detection data to obtain a group of difference values, accumulating and summing to obtain S1, and comparing S1 with a first set threshold SN 1;
if S1 is greater than SN1, it is judged that the user enters a door opening detection area, the infrared array sensor is controlled to perform third detection after a set second time length T2 to obtain a third group of detection data, the second group of detection data is subtracted from the third group of detection data to obtain another group of difference values, and the number n of the difference values which are greater than 0 in the group of difference values is counted;
if the P1 is not less than N/M N is not less than P2, the third group of detection data is used as a first group of identification data, the infrared array sensor is controlled to perform detection once every set third time length T3, the obtained detection data are sequentially used as a second … X group of identification data, wherein the P1 and the P2 are a set minimum percentage threshold value and a set maximum percentage threshold value, X is an integer and is not less than 3;
coordinate values (a 1, b 1) and (a 2, b 2) … (aX, bX) of the point position with the largest value in the first and second … X groups of identification data are respectively obtained, and whether the abscissa number series (a 1 and a2 … aX) and/or the ordinate number series (b 1 and b2 … bX) meet the increasing or decreasing relation is judged;
if yes, controlling to open the door.
As a further improvement of the invention, judging whether the user approaches the refrigerator comprises controlling the infrared array sensor to carry out first pre-detection on the front area of the refrigerator to obtain a first group of pre-detection data as background data;
controlling the infrared array sensor to perform second pre-detection after a set first pre-detection time period t1 to obtain a second group of pre-detection data, subtracting background data from the second group of pre-detection data to obtain a group of difference values, accumulating and summing to obtain S1 ', and comparing S1 ' with a first set pre-detection threshold SN1 ';
if S1 'is less than or equal to SN 1', judging that the user does not approach the refrigerator, clearing the pre-detection data, and controlling the infrared array sensor to perform the first pre-detection on the area in front of the refrigerator again to obtain a first group of pre-detection data;
if S1 ' is greater than SN1 ', controlling the infrared array sensor to perform third pre-detection after a set second pre-detection time period t2 to obtain a third group of pre-detection data, subtracting the second group of pre-detection data from the third group of pre-detection data to obtain another group of difference values, accumulating and summing to obtain S2 ', and comparing S2 ' with a second set pre-detection threshold SN2 ';
if S2 'is less than or equal to SN 2', judging that the user does not approach the refrigerator, clearing the pre-detection data, and controlling the infrared array sensor to perform the first pre-detection on the area in front of the refrigerator again to obtain a first group of pre-detection data;
if S2 'is greater than SN 2', it is determined that the user is approaching the refrigerator.
As a further improvement of the invention, the method judges that the user approaches the refrigerator, uses the third group of pre-detection data as the first group of detection data, and controls the infrared array sensor to perform the second detection after the set first time length T1 to obtain the second group of detection data.
As a further improvement of the invention, the user is judged to approach the refrigerator, and the infrared array sensor is controlled to perform the first detection after the set initial time period T0 to obtain the first group of detection data.
As a further improvement of the invention, after the pre-detection data is cleared, after a set third pre-detection time period t3, the infrared array sensor is controlled to perform the first pre-detection on the front area of the refrigerator again to obtain a first group of pre-detection data as background data.
As a further improvement of the invention, the door opening control method further comprises the steps of comparing S1 with a first set threshold SN1, and if S1 is not less than or equal to SN1, judging that the user does not enter a door opening detection area;
and clearing the detection data and the pre-detection data, and controlling the infrared array sensor to perform the first pre-detection on the area in front of the refrigerator again to obtain a first group of pre-detection data.
As a further improvement of the invention, the door opening control method further comprises the steps of comparing S1 with a first set threshold SN1, and if S1 is not less than or equal to SN1, judging that the user does not enter a door opening detection area;
clearing detection data, controlling the infrared array sensor to detect the front area of the refrigerator again to obtain a first group of detection data, subtracting background data from the first group of detection data to obtain another group of difference values, accumulating and summing to obtain S3, and comparing the S3 with a first set pre-detection threshold SN 1';
if S3 is more than SN 1', controlling the infrared array sensor to perform second detection after a set first time length T1 to obtain a second group of detection data;
and if the S3 is not more than SN 1', judging that the user is far away from the refrigerator, clearing the detection data and the pre-detection data, and controlling the infrared array sensor to perform primary pre-detection on the front area of the refrigerator again to obtain a first group of pre-detection data.
As a further development of the invention, the ratio N/M × N is compared with a given minimum percentage threshold P1 and a given maximum percentage threshold P2;
and if N/M is less than P1 or N/M is more than P2, clearing the detection data and the pre-detection data, and controlling the infrared array sensor to perform the first pre-detection on the front area of the refrigerator again to obtain a first group of pre-detection data.
As a further development of the invention, the ratio N/M × N is compared with a given minimum percentage threshold P1 and a given maximum percentage threshold P2;
if N/M is less than P1 or N/M is more than P2, clearing detection data, controlling the infrared array sensor to detect the front area of the refrigerator again to obtain a first group of detection data, subtracting background data from the first group of detection data to obtain another group of difference values, accumulating and summing to obtain S4, and comparing the S4 with a first set pre-detection threshold SN 1';
if S4 is more than SN 1', controlling the infrared array sensor to perform second detection after a set first time length T1 to obtain a second group of detection data;
and if the S4 is not more than SN 1', judging that the user is far away from the refrigerator, clearing the detection data and the pre-detection data, and controlling the infrared array sensor to perform primary pre-detection on the front area of the refrigerator again to obtain a first group of pre-detection data.
As a further improvement of the present invention, the door opening control method further includes after clearing the detection data or clearing the detection data and the pre-detection data, controlling the infrared array sensor to detect the area in front of the refrigerator again after a predetermined fourth time period T4 to obtain a first set of detection data.
As a further improvement of the invention, comparing S1 with a first set threshold SN1, if S1 is not less than SN1, judging that the user does not enter the door opening detection area;
and clearing the detection data, and controlling the infrared array sensor to detect the area in front of the refrigerator for the first time again to obtain a first group of detection data.
As a further development of the invention, the ratio N/M × N is compared with a given minimum percentage threshold P1 and a given maximum percentage threshold P2;
and if N/M is less than P1 or N/M is more than P2, clearing the detection data, and controlling the infrared array sensor to detect the front area of the refrigerator again to obtain a first group of detection data.
As a further refinement of the present invention, the predetermined second duration T2 is equal to the predetermined third duration T3.
The invention also provides a refrigerator which is provided with a refrigerator body and a door body, wherein the refrigerator body or the door body is provided with an infrared array sensor; the refrigerator adopts the door opening control method to control the door body to be opened.
The invention has the beneficial effects that: by adopting the door opening control method of the refrigerator and the refrigerator adopting the method, whether the user needs to open the door or not can be correctly identified through the infrared array sensor, the data algorithm is simple, and the hardware requirement and the realization cost are lower.
Drawings
Fig. 1 is a schematic view of a main flow of a door opening control method of a refrigerator according to the present invention;
FIG. 2 is a schematic view illustrating a process of determining that a human body approaches a refrigerator in the door opening control method of the refrigerator according to the present invention;
FIG. 3 is a schematic view of the overall structure of the refrigerator of the present invention;
fig. 4 is a schematic diagram of the coordinates of the detection area of the infrared array sensor of the refrigerator according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to embodiments shown in the drawings. The present invention is not limited to the embodiment, and structural, methodological, or functional changes made by one of ordinary skill in the art according to the embodiment are included in the scope of the present invention.
Fig. 1 to 2 show a preferred embodiment of the present invention. Referring to fig. 3 and 4, the refrigerator 100 according to the present invention includes a refrigerator body 1, a door 2, an infrared array sensor 3 disposed on the door 2 and used for detecting a front area of the refrigerator 100, a control module for controlling the operation of the refrigerator 100, and an execution module for opening the door 2. The dimension of the infrared array sensor 3 is set to be M x N, and when the detection of the infrared array sensor 3 is completed, a group of array temperature values is obtained correspondingly. Wherein, the coordinates of each point of the infrared array sensor 3 are (1, 2 … M, 1, 2 … N).
The door opening control method comprises the following steps:
the refrigerator 100 is started to operate, and whether a user approaches the refrigerator 100 is judged;
when a user approaches the refrigerator 100, controlling the infrared array sensor 3 to perform first detection on the area in front of the refrigerator 100 to obtain a first group of detection data1, performing second detection after a set first time length T1 to obtain a second group of detection data2, subtracting the first group of detection data1 from the second group of detection data2 to obtain a group of difference values, performing cumulative summation to obtain S1, and comparing the S1 with a first set threshold SN 1;
if the S1 is not less than or equal to the SN1, judging that the user does not enter the door opening detection area, clearing detection data, and controlling the infrared array sensor 3 to detect the area in front of the refrigerator 100 for the first time again to obtain a first group of detection data 1;
if S1 is greater than SN1, it is judged that the user enters a door opening detection area, the infrared array sensor 3 is controlled to perform third detection after a set second time length T2 to obtain a third group of detection data3, the second group of detection data2 is subtracted from the third group of detection data3 to obtain another group of difference values, and the number n of the difference values larger than 0 in the group of difference values is counted;
if N/M is less than P1 or N/M is more than P2, the detection data are cleared, and the infrared array sensor 3 is controlled to detect the front area of the refrigerator 100 again to obtain a first group of detection data 1.
If the P1 is not less than N/M N is not less than P2, the third group of detection data3 is used as a first group of identification data, the infrared array sensor 3 is controlled to perform detection once every set third time length T3, and the obtained detection data are sequentially used as a second … X group of identification data, wherein P1 and P2 are a set minimum percentage threshold value and a set maximum percentage threshold value, X is an integer and X is not less than 3;
coordinate values (a 1, b 1) and (a 2, b 2) … (aX, bX) of the point position with the largest value in the first and second … X groups of identification data are respectively obtained, and whether the abscissa number series (a 1 and a2 … aX) and/or the ordinate number series (b 1 and b2 … bX) meet the increasing or decreasing relation is judged;
if not, clearing the detection data, and controlling the infrared array sensor 3 to detect the front area of the refrigerator 100 again to obtain a first group of detection data 1;
if so, the door opening command is controlled to be sent out, and the door body 2 is operated and opened through the execution module.
Here, the given second period T2 is preferably set equal to the given third period T3. The overall detection time of the first and second … X groups of identification data is set to match the time for the user to stretch the arm to the door body 2. Furthermore, the door opening control method further comprises the step of judging the extending direction of the arm according to the increasing or decreasing relation of the abscissa number series (a 1, a2 … aX) and the ordinate number series (b 1, b2 … bX), and further determining the door body 2 which the user wants to execute the door opening operation.
The specific steps of determining whether the user approaches the refrigerator 100 include:
controlling the infrared array sensor 3 to perform primary pre-detection on the front area of the refrigerator 100 to obtain a first group of pre-detection data 1' as background data;
controlling the infrared array sensor 3 to perform a second pre-detection after a set first pre-detection time t1 to obtain a second group of pre-detection data2 ', subtracting background data from the second group of pre-detection data2 ' to obtain a group of difference values, accumulating and summing to obtain S1 ', and comparing the S1 ' with a first set pre-detection threshold SN1 ';
if S1 ' is not more than SN1 ', judging that the user does not approach the refrigerator 100, clearing the pre-detection data, and controlling the infrared array sensor 3 to perform the first pre-detection on the front area of the refrigerator 100 again to obtain a first group of pre-detection data1 ';
if S1 'is greater than SN 1', controlling the infrared array sensor 3 to perform third pre-detection after a set second pre-detection time period t2 to obtain a third group of pre-detection data3 ', subtracting the second group of pre-detection data 2' from the third group of pre-detection data3 'to obtain another group of difference values, accumulating and summing to obtain S2', and comparing the S2 'with a second set pre-detection threshold SN 2';
if the S2 ' is not more than or equal to SN2 ', judging that the user does not approach the refrigerator 100, clearing the pre-detection data, and controlling the infrared array sensor 3 to perform the first pre-detection on the area in front of the refrigerator 100 again to obtain a first group of pre-detection data1 ';
if S2 'is greater than SN 2', it is determined that the user approaches the refrigerator 100. After the pre-detection data is cleared, the infrared array sensor 3 is controlled to perform the first pre-detection on the front area of the refrigerator 100 again after the predetermined third pre-detection time period t3 to obtain a first set of pre-detection data 1' as background data.
When the user is judged to approach the refrigerator 100, the third group of pre-detection data 3' is used as the first group of detection data1, and the infrared array sensor 3 is controlled to perform second detection after the set first time length T1 to obtain a second group of detection data 2; and controlling the infrared array sensor 3 to perform first detection after the set initial time T0 to obtain a first group of detection data 1.
Example two (not shown):
different from the foregoing embodiment, the door opening control method further includes comparing S1 with a first set threshold SN1, and if S1 is greater than or equal to SN1, determining that the user does not enter the door opening detection region;
clearing the detection data and the pre-detection data, and controlling the infrared array sensor 3 to perform the first pre-detection on the front area of the refrigerator 100 again to obtain a first group of pre-detection data 1'; or clearing the detection data, controlling the infrared array sensor 3 to detect the front area of the refrigerator 100 again to obtain a first group of detection data1, subtracting background data from the first group of detection data1 to obtain another group of difference values, accumulating and summing to obtain S3, and comparing the S3 with a first set pre-detection threshold SN 1';
if S3 is more than SN 1', controlling the infrared array sensor 3 to perform a second detection after a set first time length T1 to obtain a second group of detection data 2;
and if the S3 is not more than SN1 ', judging that the user is far away from the refrigerator 100, clearing the detection data and the pre-detection data, and controlling the infrared array sensor 3 to perform the first pre-detection on the front area of the refrigerator 100 again to obtain a first group of pre-detection data 1'.
In addition, the door opening control method also comprises the step of comparing the ratio N/M N with a set minimum percentage threshold value P1 and a set maximum percentage threshold value P2;
if N/M is less than P1 or N/M is more than P2, clearing the detection data and the pre-detection data, and controlling the infrared array sensor 3 to perform the first pre-detection on the front area of the refrigerator 100 again to obtain a first group of pre-detection data 1'; or clearing the detection data, controlling the infrared array sensor 3 to detect the front area of the refrigerator 100 again to obtain a first group of detection data1, subtracting background data from the first group of detection data1 to obtain another group of difference values, accumulating and summing to obtain S4, and comparing the S4 with a first set pre-detection threshold SN 1';
if S4 is more than SN 1', controlling the infrared array sensor 3 to perform a second detection after a set first time length T1 to obtain a second group of detection data 2;
and if the S4 is not more than SN1 ', judging that the user is far away from the refrigerator 100, clearing the detection data and the pre-detection data, and controlling the infrared array sensor 3 to perform the first pre-detection on the front area of the refrigerator 100 again to obtain a first group of pre-detection data 1'.
The door opening control method further includes the step of controlling the infrared array sensor 3 to detect the area in front of the refrigerator 100 again after a predetermined fourth time period T4 after the detection data is cleared or the detection data and the pre-detection data are cleared, so as to obtain a first group of detection data 1.
In summary, with the door opening control method and the refrigerator 100 using the same of the present invention, it is determined whether the user approaches the refrigerator 100 through the infrared array sensor 3, and then it is further determined whether the user enters the door opening detection area, and then it is determined whether the user wants to perform a door opening operation. The door opening control method can correctly identify whether the user needs to open the door or not by the infrared array sensor 3 without redundant image data analysis and processing, and has concise data algorithm, lower hardware requirement and implementation cost.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (14)
1. A door opening control method of a refrigerator, the refrigerator is provided with a control module and an infrared array sensor used for detecting a front area of the refrigerator, the dimension of the infrared array sensor is set to be M x N, and the door opening control method is characterized by comprising the following steps:
the refrigerator is started to operate, and whether a user approaches the refrigerator or not is judged;
judging that a user approaches the refrigerator, controlling the infrared array sensor to perform first detection on an area in front of the refrigerator to obtain a first group of detection data, performing second detection after a set first time length T1 to obtain a second group of detection data, subtracting the first group of detection data from the second group of detection data to obtain a group of difference values, accumulating and summing to obtain S1, and comparing S1 with a first set threshold SN 1;
if S1 is greater than SN1, it is judged that the user enters a door opening detection area, the infrared array sensor is controlled to perform third detection after a set second time length T2 to obtain a third group of detection data, the second group of detection data is subtracted from the third group of detection data to obtain another group of difference values, and the number n of the difference values larger than 0 in the group of difference values is counted;
if the P1 is not less than N/M N is not less than P2, the third group of detection data is used as a first group of identification data, the infrared array sensor is controlled to perform detection once every set third time length T3, the obtained detection data are sequentially used as a second … X group of identification data, wherein the P1 and the P2 are a set minimum percentage threshold value and a set maximum percentage threshold value, X is an integer and is not less than 3;
coordinate values (a 1, b 1) and (a 2, b 2) … (aX, bX) of the point position with the largest value in the first and second … X groups of identification data are respectively obtained, and whether the abscissa number series (a 1 and a2 … aX) and/or the ordinate number series (b 1 and b2 … bX) meet the increasing relationship is judged;
if yes, controlling to open the door.
2. The door opening control method according to claim 1, characterized in that: judging whether a user approaches the refrigerator or not, wherein the judgment comprises the step of controlling the infrared array sensor to carry out first pre-detection on an area in front of the refrigerator to obtain a first group of pre-detection data which are used as background data;
controlling the infrared array sensor to perform second pre-detection after a set first pre-detection time period t1 to obtain a second group of pre-detection data, subtracting background data from the second group of pre-detection data to obtain a group of difference values, accumulating and summing to obtain S1 ', and comparing S1 ' with a first set pre-detection threshold SN1 ';
if S1 'is less than or equal to SN 1', judging that the user does not approach the refrigerator, clearing the pre-detection data, and controlling the infrared array sensor to perform the first pre-detection on the area in front of the refrigerator again to obtain a first group of pre-detection data;
if S1 ' is greater than SN1 ', controlling the infrared array sensor to perform third pre-detection after a set second pre-detection time period t2 to obtain a third group of pre-detection data, subtracting the second group of pre-detection data from the third group of pre-detection data to obtain another group of difference values, accumulating and summing to obtain S2 ', and comparing S2 ' with a second set pre-detection threshold SN2 ';
if S2 'is less than or equal to SN 2', judging that the user does not approach the refrigerator, clearing the pre-detection data, and controlling the infrared array sensor to perform the first pre-detection on the area in front of the refrigerator again to obtain a first group of pre-detection data;
if S2 'is greater than SN 2', it is determined that the user is approaching the refrigerator.
3. The door opening control method according to claim 2, characterized in that: and judging that the user approaches the refrigerator, taking the third group of pre-detection data as a first group of detection data, and controlling the infrared array sensor to perform second detection after the set first time length T1 to obtain a second group of detection data.
4. The door opening control method according to claim 2, characterized in that: and judging that the user approaches the refrigerator, and controlling the infrared array sensor to perform first detection after the set initial time T0 to obtain a first group of detection data.
5. The door opening control method according to claim 2, characterized in that: after the pre-detection data is cleared, after a set third pre-detection time period t3, the infrared array sensor is controlled to perform the first pre-detection on the area in front of the refrigerator again to obtain a first group of pre-detection data which is used as background data.
6. The door opening control method according to claim 2, characterized in that: the door opening control method further comprises the steps of comparing S1 with a first set threshold SN1, and if S1 is not more than SN1, judging that the user does not enter a door opening detection area;
and clearing the detection data and the pre-detection data, and controlling the infrared array sensor to perform the first pre-detection on the area in front of the refrigerator again to obtain a first group of pre-detection data.
7. The door opening control method according to claim 2, characterized in that: the door opening control method further comprises the steps of comparing S1 with a first set threshold SN1, and if S1 is not more than SN1, judging that the user does not enter a door opening detection area;
clearing detection data, controlling the infrared array sensor to detect the front area of the refrigerator again to obtain a first group of detection data, subtracting background data from the first group of detection data to obtain another group of difference values, accumulating and summing to obtain S3, and comparing the S3 with a first set pre-detection threshold SN 1';
if S3 is more than SN 1', controlling the infrared array sensor to perform second detection after a set first time length T1 to obtain a second group of detection data;
and if the S3 is not more than SN 1', judging that the user is far away from the refrigerator, clearing the detection data and the pre-detection data, and controlling the infrared array sensor to perform primary pre-detection on the front area of the refrigerator again to obtain a first group of pre-detection data.
8. The door opening control method according to claim 2, characterized in that: comparing the ratio N/M N with a predetermined minimum percentage threshold P1 and a predetermined maximum percentage threshold P2;
and if N/M is less than P1 or N/M is more than P2, clearing the detection data and the pre-detection data, and controlling the infrared array sensor to perform the first pre-detection on the front area of the refrigerator again to obtain a first group of pre-detection data.
9. The door opening control method according to claim 2, characterized in that: comparing the ratio N/M N with a predetermined minimum percentage threshold P1 and a predetermined maximum percentage threshold P2;
if N/M is less than P1 or N/M is more than P2, clearing detection data, controlling the infrared array sensor to detect the front area of the refrigerator again to obtain a first group of detection data, subtracting background data from the first group of detection data to obtain another group of difference values, accumulating and summing to obtain S4, and comparing the S4 with a first set pre-detection threshold SN 1';
if S4 is more than SN 1', controlling the infrared array sensor to perform second detection after a set first time length T1 to obtain a second group of detection data;
and if the S4 is not more than SN 1', judging that the user is far away from the refrigerator, clearing the detection data and the pre-detection data, and controlling the infrared array sensor to perform primary pre-detection on the front area of the refrigerator again to obtain a first group of pre-detection data.
10. The door opening control method according to any one of claims 6 to 9, characterized in that: the door opening control method further comprises the step of controlling the infrared array sensor to detect the front area of the refrigerator again after a set fourth time period T4 to obtain a first group of detection data after the detection data is cleared or the detection data and the pre-detection data are cleared.
11. The door opening control method according to claim 1, characterized in that: comparing S1 with a first set threshold SN1, if S1 is not more than SN1, judging that the user does not enter a door opening detection area;
and clearing the detection data, and controlling the infrared array sensor to detect the area in front of the refrigerator for the first time again to obtain a first group of detection data.
12. The door opening control method according to claim 1, characterized in that: comparing the ratio N/M N with a predetermined minimum percentage threshold P1 and a predetermined maximum percentage threshold P2;
and if N/M is less than P1 or N/M is more than P2, clearing the detection data, and controlling the infrared array sensor to detect the front area of the refrigerator again to obtain a first group of detection data.
13. The door opening control method according to claim 1, characterized in that: the predetermined second duration T2 is equal to the predetermined third duration T3.
14. The utility model provides a refrigerator, has box and the door body, be equipped with infrared array sensor on box or the door body, its characterized in that: the refrigerator employs the door opening control method of any one of claims 1 to 13 to control opening of a door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710625750.1A CN107477970B (en) | 2017-07-27 | 2017-07-27 | Refrigerator door opening control method and refrigerator adopting same |
Applications Claiming Priority (1)
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| CN112444096A (en) * | 2019-08-28 | 2021-03-05 | 博西华电器（江苏）有限公司 | Refrigerator and control method thereof |
| CN113112650B (en) * | 2021-04-14 | 2022-10-25 | 广东欧比特科技有限公司 | Bluetooth intelligent lock system and use method thereof |
| CN116045597A (en) * | 2022-12-20 | 2023-05-02 | 珠海格力电器股份有限公司 | Refrigerator control method and device, electronic equipment and storage medium |
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