CN114198977A - Method for detecting human body approaching by refrigerator and refrigerator adopting same - Google Patents
Method for detecting human body approaching by refrigerator and refrigerator adopting same Download PDFInfo
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- CN114198977A CN114198977A CN202111486056.9A CN202111486056A CN114198977A CN 114198977 A CN114198977 A CN 114198977A CN 202111486056 A CN202111486056 A CN 202111486056A CN 114198977 A CN114198977 A CN 114198977A
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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
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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
- F25D2600/00—Control issues
- F25D2600/02—Timing
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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
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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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
Abstract
The invention provides a method for detecting human body approach of a refrigerator and the refrigerator adopting the method. The method comprises the steps of controlling the infrared array sensor to detect the area in front of the refrigerator to obtain a first group of detection data as background data; controlling the infrared array sensor to perform second detection after a set first time length T1 to obtain a second group of detection data, subtracting background data from the second group of detection data to obtain a group of difference values, and accumulating and summing to obtain S1; when the S1 is greater than a first set threshold SN1, controlling the infrared array sensor to perform third detection after a set second time length T2 to obtain a third group of detection data, subtracting the second group of detection data from the third group of detection data to obtain another group of difference values, and performing cumulative summation to obtain S2; and when the S2 is greater than the second set threshold SN2, judging that the human body approaches the refrigerator. The method can accurately detect whether the human body approaches the refrigerator or not, and reduces misjudgment.
Description
Technical Field
The invention relates to the technical field of automatic control of household appliances, in particular to a method for detecting human body approaching of a refrigerator and the refrigerator adopting the method.
Background
With the continuous progress of society, users put higher demands on the intellectualization and humanization of traditional household appliances. The refrigerator capable of automatically detecting the approach of the human body is provided in the industry, and when the approach of the human body is detected, the refrigerator executes corresponding actions, such as starting or adjusting the brightness of a display screen, so that better use experience is brought to a user, energy can be saved, and the service life of corresponding parts such as the display screen can be prolonged. The infrared sensor is an important way for realizing human body approach detection, however, in most of the existing technical schemes, the infrared sensor detects the presence of a person in the detection area, and then the human body approach is judged and a corresponding signal is sent out. The method often generates misjudgment, and causes energy waste and misunderstanding of users.
Chinese patent CN 102878775A discloses a method for controlling a refrigerator, which transmits an infrared signal according to a PWM signal by an infrared transmitting device in a predetermined period, and controls whether the refrigerator enters a predetermined operating mode by determining whether a reflected signal is received by an infrared receiving device and whether the number of times of receiving the reflected signal is greater than a predetermined number of times. However, when the user moves for a long time in the detection area of the refrigerator, the misjudgment also occurs; and when the user approaches from different directions, the detection error is also larger.
In view of the above, it is necessary to provide a new method for detecting human body approach for a refrigerator and a refrigerator using the same.
Disclosure of Invention
The invention aims to provide a method for detecting human body approaching of a refrigerator and the refrigerator adopting the method, which can accurately detect whether the human body approaches the refrigerator, further determine whether to execute corresponding follow-up actions and reduce misjudgment.
In order to achieve the above object, the present invention provides a method for detecting human body approach for a refrigerator, the refrigerator having a control module and an infrared array sensor for detecting a front area of the refrigerator, the method comprising:
the refrigerator is started to operate, the infrared array sensor detects the area in front of the refrigerator to obtain a first group of detection data as background data;
controlling the infrared array sensor to perform second detection after a set first time length T1 to obtain a second group of detection data, subtracting background 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 less than or equal to SN1, judging that no one approaches the refrigerator;
clearing detection data, and controlling the infrared array sensor to detect the area in front of the refrigerator again to obtain a first group of detection data as background data;
if S1 is greater than SN1, the infrared array sensor is controlled to carry out 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, the difference values are accumulated and summed to obtain S2, and S2 and a second set threshold SN2 are compared;
if S2 is more than SN2, it is judged that someone approaches the refrigerator.
As a further improvement of the invention, the method also comprises the step of comparing S2 with a second set threshold SN2, and if S2 is less than or equal to SN2, judging that no person approaches the refrigerator;
and clearing the detection data, and controlling the infrared array sensor to detect the area in front of the refrigerator again to obtain a first group of detection data as background data.
As a further improvement of the present invention, the method further includes clearing the detection data, and controlling the infrared array sensor 3 to detect the front area of the refrigerator 100 again after a predetermined third time period T3 to obtain a first group of detection data1 as background data.
As a further improvement of the invention, the method also comprises the step of comparing S2 with a second set threshold SN2, and if S2 is less than or equal to SN2, judging that no person approaches the refrigerator;
subtracting the background data from the third group of detection data to obtain another group of difference values, accumulating and summing to obtain S3, and comparing S3 with a first set threshold SN 1;
and if the S3 is not more than SN1, 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 background data.
As a further improvement of the present invention, after the detection data is cleared and after a fourth time period T4 elapses, the infrared array sensor is controlled to detect the area in front of the refrigerator again to obtain a first set of detection data as background data.
As a further improvement of the invention, if S3 > SN1, the infrared array sensor is controlled to detect the front area of the refrigerator after a predetermined second time period T2 to obtain a new third set of detection data.
As a further improvement of the invention, when S3 is greater than SN1, the second group of detection data is cleared, the third group of detection data is replaced by the second group of detection data, and the infrared array sensor is controlled to detect the front area of the refrigerator after a set second time length T2 to obtain a new third group of detection data.
As a further improvement of the present invention, after the detection data is cleared, after a predetermined third time period T3, the infrared array sensor is controlled to detect the front area of the refrigerator again to obtain a first set of detection data as background data.
As a further improvement of the present invention, the first set threshold SN1 is set larger than the second set threshold SN 2.
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 method for detecting the human body approach to detect whether the human body approaches.
The invention has the beneficial effects that: by adopting the method for detecting the approach of the human body by the refrigerator and the refrigerator adopting the method, the infrared array sensor can accurately detect whether the human body approaches the refrigerator, so as to determine whether to execute corresponding follow-up actions and reduce the misjudgment probability.
Drawings
FIG. 1 is a schematic view of the main flow of the method for detecting human body approach in the refrigerator of the present invention;
fig. 2 is a schematic view of the overall structure of the refrigerator of 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.
Please refer to fig. 1, which is a schematic diagram of a main flow of a method for detecting human body proximity according to the present invention; referring to fig. 2, the present invention further provides a refrigerator 100 for detecting whether a human body approaches by using the above method, where the refrigerator 100 includes a refrigerator body 1, a door body 2, an infrared array sensor 3 disposed on the door body 2 and used for detecting a front area of the refrigerator 100, and a control module for controlling the operation of the refrigerator 100. When the detection of the infrared array sensor 3 is completed, a group of array temperature values is obtained correspondingly.
The method comprises the following steps:
the refrigerator 100 is started to operate, the infrared array sensor 3 is controlled to detect the front area of the refrigerator 100 to obtain a first group of detection data1 as background data;
controlling the infrared array sensor 3 to perform second detection after a set first time length T1 to obtain a second group of detection data2, subtracting background data from the second group of detection data2 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 not more than SN1, it is judged that no one approaches the refrigerator, detection data are cleared, the infrared array sensor 3 is controlled to detect the area in front of the refrigerator 100 again, and a first group of detection data1 is obtained and used as background data;
if S1 is more than SN1, controlling the infrared array sensor 3 to perform third detection after a set second time length T2 to obtain a third group of detection data3, subtracting the second group of detection data2 from the third group of detection data3 to obtain another group of difference values, performing cumulative summation to obtain S2, and comparing the S2 with a second set threshold SN 2;
if S2 is not more than SN2, it is judged that no one approaches the refrigerator, detection data are cleared, the infrared array sensor 3 is controlled to detect the area in front of the refrigerator 100 again, and a first group of detection data1 is obtained and used as background data;
if S2 is more than SN2, it is judged that someone approaches the refrigerator. The first set threshold SN1 and the second set threshold SN2 are both empirical constants, typically SN2 is set to be greater than SN 1.
After the detection data are cleared, after a set third time period T3, the infrared array sensor 3 is controlled to detect the area in front of the refrigerator 100 again to obtain a first group of detection data1 as background data. Therefore, the detection frequency of the infrared array sensor 3 can be reduced, and repeated data interaction and processing are avoided.
In other embodiments of the present invention, when S1 ≦ SN1, it is further determined as follows:
when the S1 is not less than 0, clearing the second group of detection data2, reserving the first group of detection data1 as background data, and controlling the infrared array sensor 3 to detect the front area of the refrigerator 100 after a set first time length T1 to obtain a second group of detection data 2;
when the S1 is less than 0, the first group of detection data1 is cleared, the second group of detection data2 is replaced by background data, and the infrared array sensor 3 is controlled to detect the front area of the refrigerator 100 after a set first time length T1 to obtain a new second group of detection data 2.
When S2 ≦ SN2, the method further includes:
subtracting the background data from the third group of detection data3 to obtain another group of difference values, accumulating and summing to obtain S3, and comparing S3 with a first set threshold SN 1;
if S3 is not greater than SN1, clearing the detection data, and controlling the infrared array sensor 3 to perform the detection on the front area of the refrigerator 100 again to obtain the first group of detection data1, and preferably, after a predetermined fourth time period T4 as background data, performing the detection again by the infrared array sensor 3, where the predetermined fourth time period T4 is set to be equal to the predetermined third time period T3;
if S3 is greater than SN1, the infrared array sensor 3 is controlled to detect the front area of the refrigerator 100 after a predetermined second time period T2 to obtain a new third set of detection data 3.
Specifically, when S3 > SN1, the second set of inspection data2 is cleared, the third set of inspection data3 is replaced with the second set of inspection data2, and the infrared array sensor 3 is controlled to inspect the front area of the refrigerator 100 after a predetermined second time period T2 to obtain a new third set of inspection data 3.
In summary, the method for detecting human body approach by using the refrigerator and the refrigerator 100 using the method of the invention can accurately detect whether the human body approaches the refrigerator 100 or not by performing two judgments in sequence according to the detection result of the infrared array sensor 3, thereby determining whether to execute corresponding follow-up actions or not, and effectively reducing the probability of misjudgments.
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 (10)
1. A method of detecting human proximity in a refrigerator having a control module and an infrared array sensor for detecting a region in front of the refrigerator, the method comprising:
the refrigerator is started to operate, the infrared array sensor detects the area in front of the refrigerator to obtain a first group of detection data as background data;
controlling the infrared array sensor to perform second detection after a set first time length T1 to obtain a second group of detection data, subtracting background 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 less than or equal to SN1, judging that no one approaches the refrigerator;
clearing detection data, and controlling the infrared array sensor to detect the area in front of the refrigerator again to obtain a first group of detection data as background data;
if S1 is greater than SN1, the infrared array sensor is controlled to carry out 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, the difference values are accumulated and summed to obtain S2, and S2 and a second set threshold SN2 are compared;
if S2 is more than SN2, it is judged that someone approaches the refrigerator.
2. The method of claim 1, wherein: the method further comprises the step of comparing S2 with a second set threshold SN2, and if S2 is not more than SN2, judging that no person approaches the refrigerator;
and clearing the detection data, and controlling the infrared array sensor to detect the area in front of the refrigerator again to obtain a first group of detection data as background data.
3. The method of claim 2, wherein: after the detection data are cleared, after a set third time period T3, the infrared array sensor 3 is controlled to detect the area in front of the refrigerator 100 again to obtain a first group of detection data1 as background data.
4. The method of claim 1, wherein: the method further comprises the step of comparing S2 with a second set threshold SN2, and if S2 is not more than SN2, judging that no person approaches the refrigerator;
subtracting the background data from the third group of detection data to obtain another group of difference values, accumulating and summing to obtain S3, and comparing S3 with a first set threshold SN 1;
and if the S3 is not more than SN1, 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 background data.
5. The method of claim 4, wherein: after the detection data are cleared and after a fourth time period T4, the infrared array sensor is controlled to detect the area in front of the refrigerator again to obtain a first group of detection data which are used as background data.
6. The method of claim 4, wherein: and if S3 is more than SN1, controlling the infrared array sensor to detect the front area of the refrigerator after a set second time length T2 to obtain a new third group of detection data.
7. The method of claim 6, wherein: and when the S3 is greater than the SN1, clearing the second group of detection data, replacing the third group of detection data with the second group of detection data, and controlling the infrared array sensor to detect the front area of the refrigerator after a set second time length T2 to obtain a new third group of detection data.
8. The method of claim 7, wherein: after the detection data are cleared, after a set third time period T3, the infrared array sensor is controlled to detect the area in front of the refrigerator again to obtain a first group of detection data which are used as background data.
9. The method according to claims 1 to 8, characterized in that: the first set threshold SN1 is set greater than the second set threshold SN 2.
10. 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 method of any one of claims 1 to 9 to detect human proximity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111486056.9A CN114198977B (en) | 2017-07-27 | 2017-07-27 | Method for detecting human body approach of refrigerator and refrigerator adopting method |
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| CN202111486056.9A CN114198977B (en) | 2017-07-27 | 2017-07-27 | Method for detecting human body approach of refrigerator and refrigerator adopting method |
| CN201710624113.2A CN107421210B (en) | 2017-07-27 | 2017-07-27 | Method for detecting human body approaching by refrigerator and refrigerator adopting same |
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| CN201710624113.2A Division CN107421210B (en) | 2017-07-27 | 2017-07-27 | Method for detecting human body approaching by refrigerator and refrigerator adopting same |
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| CN114198977A true CN114198977A (en) | 2022-03-18 |
| CN114198977B CN114198977B (en) | 2023-05-16 |
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| CN202111486056.9A Active CN114198977B (en) | 2017-07-27 | 2017-07-27 | Method for detecting human body approach of refrigerator and refrigerator adopting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108363053B (en) * | 2017-12-28 | 2022-07-05 | 生迪智慧科技有限公司 | Object movement monitoring method and device |
| CN110568515B (en) * | 2019-08-26 | 2022-05-31 | 深圳市枫芒科技有限公司 | Human body existence detection method and device based on infrared array and storage medium |
| CN112444096A (en) * | 2019-08-28 | 2021-03-05 | 博西华电器（江苏）有限公司 | Refrigerator and control method thereof |
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| CN206207880U (en) * | 2014-02-28 | 2017-05-31 | 松下知识产权经营株式会社 | Freezer |
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Also Published As
| Publication number | Publication date |
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| CN107421210B (en) | 2022-01-04 |
| CN107421210A (en) | 2017-12-01 |
| CN114198977B (en) | 2023-05-16 |
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