CN111412506A - Starting detection method and device of cooking equipment, range hood and storage medium - Google Patents

Starting detection method and device of cooking equipment, range hood and storage medium Download PDF

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Publication number
CN111412506A
CN111412506A CN202010246193.4A CN202010246193A CN111412506A CN 111412506 A CN111412506 A CN 111412506A CN 202010246193 A CN202010246193 A CN 202010246193A CN 111412506 A CN111412506 A CN 111412506A
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China
Prior art keywords
temperature
trend line
slope
cooking
cooking equipment
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CN202010246193.4A
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CN111412506B (en
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禹春圭
李勇
李种文
程刚
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Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
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Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00Details
    • F24C15/20Removing cooking fumes
    • F24C15/2021Arrangement or mounting of control or safety systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cookers (AREA)
  • Ventilation (AREA)

Abstract

The invention discloses a method and a device for detecting the starting of cooking equipment, a range hood and a storage medium. The opening detection method comprises the following steps: acquiring an initial temperature of the cooking equipment, an actual temperature of the cooking equipment, an initial ambient temperature and a current ambient temperature; calculating a relative temperature between an actual temperature of the cooking equipment and an initial temperature of the cooking equipment, generating a first temperature change curve according to the relative temperature, calculating a relative environment temperature between the initial environment temperature and a current environment temperature, and generating a second temperature change curve according to the relative environment temperature; and judging whether the cooking equipment is started or not according to the first trend line of the first temperature change curve and the second trend line of the second temperature change curve. According to the opening detection method, misjudgment caused by human body temperature is effectively prevented, the accuracy and stability of judging the firing of the cooking equipment are improved, meanwhile, the opening time of the cooking equipment can be greatly reduced, and the range hood can be accurately and automatically opened.

Description

Starting detection method and device of cooking equipment, range hood and storage medium
Technical Field
The invention relates to the technical field of household appliances, in particular to a method and a device for detecting the starting of cooking equipment, a range hood and a readable storage medium.
Background
In the related art, with the development of sensor technology, communication technology and IOT (Internet of Things) technology, the intelligent technology of kitchen appliance products is developed more and more mature. In the prior art, the firing state of the cooking equipment can be judged based on the temperature of the cooking equipment, and the range hood is automatically opened according to the firing state of the cooking equipment.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting the starting of cooking equipment, a smoking machine and a storage medium.
The opening detection method of the embodiment of the invention comprises the following steps: acquiring an initial temperature of the cooking equipment, an actual temperature of the cooking equipment, an initial ambient temperature and a current ambient temperature; calculating a relative temperature between an actual temperature of the cooking equipment and an initial temperature of the cooking equipment, generating a first temperature change curve according to the relative temperature, calculating a relative ambient temperature between the initial ambient temperature and the current ambient temperature, and generating a second temperature change curve according to the relative ambient temperature; and judging whether the cooking equipment is started or not according to the first trend line of the first temperature change curve and the second trend line of the second temperature change curve.
In the start detection method of the embodiment, whether the cooking equipment is started or not is judged through the first trend line of the first temperature change curve and the second trend line of the second temperature change curve, so that the probe of the human body approaching the temperature sensor and the firing scene of the cooking equipment can be distinguished, misjudgment caused by the temperature of the human body is effectively prevented, the accuracy and the stability of judging firing of the cooking equipment are improved, meanwhile, the start time of judging the cooking equipment is greatly reduced, and the start state of the cooking equipment is quickly determined.
In some embodiments, obtaining an initial temperature and an initial ambient temperature of the cooking device comprises: acquiring the temperature change rate of the cooking equipment; and under the condition that the temperature change rate is larger than a preset value, taking the current actual temperature of the cooking equipment as the initial temperature of the cooking equipment, and taking the current environment temperature as the initial environment temperature. Therefore, the accuracy and the stability of judging the firing of the cooking equipment can be improved.
In some embodiments, the turn-on detection method comprises: determining the firepower of the cooking equipment according to the temperature change rate; and acquiring the preset value according to the firepower of the cooking equipment. Therefore, the preset value is obtained according to the firepower of the cooking equipment, and the accuracy of judging the firing of the cooking equipment can be improved.
In some embodiments, the determining whether the cooking device is turned on according to a first trend line of the first temperature variation curve and a second trend line of the second temperature variation curve includes: acquiring the first trend line corresponding to each first curve segment and the second trend line corresponding to each second curve segment; calculating the slope of the first trend line and the slope of the second trend line; and judging whether the cooking equipment is started or not according to the slope of the first trend line and the slope of the second trend line. Thus, whether the cooking device is turned on or not can be judged quickly and accurately.
In some embodiments, determining whether the cooking device is turned on according to the slope of the first trend line and the slope of the second trend line includes: and judging that the cooking equipment is started under the condition that the slope of the first trend line is greater than or equal to a first preset ratio and the slope of the second trend line is greater than or equal to a second preset ratio. Thus, the accuracy of judging the opening of the cooking device can be improved.
In some embodiments, the turn-on detection method comprises: and under the condition that the slope of the first trend line is smaller than a third preset ratio, recalculating the slope of the first trend line and the slope of the second trend line, wherein the third preset ratio is smaller than the first preset ratio. Therefore, the accuracy of calculating the slope of the first trend line and the slope of the second trend line can be improved, and the accuracy of judging whether the cooking equipment is started or not can be improved.
In some embodiments, the turn-on detection method comprises: and under the condition that the time length for calculating the slope of the first trend line and the slope of the second trend line exceeds the preset time length, recalculating the slope of the first trend line and the slope of the second trend line. Therefore, the accuracy of calculating the slope of the first trend line and the slope of the second trend line can be improved, and the accuracy of judging whether the cooking equipment is started or not can be improved.
In some embodiments, the turn-on detection method comprises: and controlling the range hood to be started under the condition of judging that the cooking equipment is started. Therefore, the range hood can be quickly opened, and the user experience is improved.
The embodiment of the invention provides a starting detection device of cooking equipment, which comprises a controller, wherein the controller is used for executing the starting detection method of any one embodiment.
Among detection device is opened to above-mentioned embodiment, judge cooking equipment through first trend line of first temperature change curve and second trend line of second temperature change curve and open, can distinguish human probe and cooking equipment's the scene of firing that is close to temperature sensor like this, thereby effectively prevent the misjudgement that human body temperature arouses, improve accuracy and the stability of judging cooking equipment firing, simultaneously can make the opening time who judges cooking equipment significantly reduce, confirm cooking equipment's the state of opening fast, open range hood automatically, promote user experience.
The embodiment of the invention provides a range hood which comprises a starting detection device of cooking equipment.
Among the above-mentioned embodiment range hood, judge cooking equipment through the first trend line of first temperature change curve and the second trend line of second temperature change curve and whether open, can distinguish human body proximity temperature sensor's probe and cooking equipment's scene of firing like this, thereby effectively prevent the misjudgment that human body temperature arouses, improve accuracy and the stability of judging cooking equipment firing, simultaneously can be so that the opening time who judges cooking equipment significantly reduces, confirm cooking equipment's the state of opening fast, open range hood automatically, promote user experience.
The present invention provides a non-transitory computer-readable storage medium containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the boot detection method of any of the above embodiments.
In the computer-readable storage medium of the above embodiment, whether the cooking device is turned on is judged through the first trend line of the first temperature change curve and the second trend line of the second temperature change curve, so that the probe of the human body approaching the temperature sensor and the firing scene of the cooking device can be distinguished, thereby effectively preventing misjudgment caused by the human body temperature, improving the accuracy and stability of judging the firing of the cooking device, greatly reducing the turn-on time of judging the cooking device, and rapidly determining the turn-on state of the cooking device.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a method for detecting the turning-on of a cooking apparatus according to an embodiment of the present invention.
Fig. 2 is a block diagram of a turn-on detecting device according to an embodiment of the present invention.
Fig. 3 is a schematic view of a cooking device and a range hood according to an embodiment of the present invention.
Fig. 4 is another flowchart of a method for detecting the turn-on of a cooking appliance according to an embodiment of the present invention.
Fig. 5 is still another flowchart of a method for detecting the turn-on of a cooking appliance according to an embodiment of the present invention.
Fig. 6 is a graph of a temperature sensor detecting a current temperature of a cooking appliance as a function of time in a scene in which the cooking appliance performs cooking with fire power of a big fire, and a graph of a current ambient temperature detected by the temperature sensor as a function of time in a case in which the cooking appliance performs cooking with fire power of a big fire.
Fig. 7 is a graph of a current temperature of the cooking appliance over time, which is detected by the temperature sensor, in a scenario where a human body approaches the temperature sensor according to the embodiment of the present invention without the cooking appliance being turned on, and a graph of a current ambient temperature, which is detected by the temperature sensor, over time, when a human body approaches the temperature sensor without the cooking appliance being turned on.
Fig. 8 is still another flowchart of a method for detecting the turn-on of a cooking apparatus according to an embodiment of the present invention.
Fig. 9 is a schematic diagram of a first temperature variation curve and a first trend line of a cooking apparatus according to an embodiment of the invention.
Fig. 10 is a schematic diagram of a second temperature variation curve and a second trend line of the cooking apparatus according to the embodiment of the invention.
Fig. 11 is still another flowchart of a method for detecting the turn-on of a cooking apparatus according to an embodiment of the present invention.
FIG. 12 is a schematic diagram of the interaction of a computer readable storage medium and a processor according to an embodiment of the present invention.
Description of the main element symbols:
the starting detection device 100, the controller 10, the temperature change rate determination unit 11, the trend line calculation unit 13, the trend line initialization unit 15, the trend line determination unit 17, the trend line preset ratio storage unit 19, the temperature detection unit 20, the temperature sensor 22, the starting control unit 40, the computer-readable storage medium 300, the processor 400, the range hood 110, and the cooking apparatus 200.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. In order to simplify the disclosure of embodiments of the invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, embodiments of the invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, embodiments of the present invention provide examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
Referring to fig. 1 to 3, the method for detecting the opening of the cooking apparatus 200 according to the embodiment of the present invention can be applied to the opening detecting device 100 (fig. 2) of the cooking apparatus 200 according to the embodiment of the present invention. The opening detection method comprises the following steps:
step S20, acquiring an initial temperature of the cooking apparatus 200, an actual temperature of the cooking apparatus 200, an initial ambient temperature, and a current ambient temperature;
step S40 of calculating a relative temperature between an actual temperature of the cooking appliance 200 and an initial temperature of the cooking appliance 200 and generating a first temperature change curve according to the relative temperature, and calculating a relative ambient temperature between the initial ambient temperature and a current ambient temperature and generating a second temperature change curve according to the relative ambient temperature;
in step S60, it is determined whether the cooking apparatus 200 is turned on according to the first trend line of the first temperature variation curve and the second trend line of the second temperature variation curve.
The method for detecting the turning-on of the cooking appliance 200 of the above embodiment can be implemented by the turning-on detecting device 100 of the present embodiment. The opening detection device 100 includes a controller 10. The steps S20, S40 and S60 may be implemented by the controller 10. That is, the controller 10 is configured to obtain an initial temperature of the cooking apparatus 200, an actual temperature of the cooking apparatus 200, an initial ambient temperature, and a current ambient temperature, calculate a relative temperature between the actual temperature of the cooking apparatus 200 and the initial temperature of the cooking apparatus 200, generate a first temperature change curve according to the relative temperature, calculate a relative ambient temperature between the initial ambient temperature and the current ambient temperature, generate a second temperature change curve according to the relative ambient temperature, and determine whether the cooking apparatus 200 is turned on according to a first trend line of the first temperature change curve and a second trend line of the second temperature change curve.
In the start detection method and the start detection device 100 of the cooking apparatus 200 according to the above embodiment, whether the cooking apparatus 200 is started or not is determined by the first trend line of the first temperature change curve and the second trend line of the second temperature change curve, so that the probe of the human body approaching the temperature sensor 22 and the firing scene of the cooking apparatus 200 can be distinguished, thereby effectively preventing misjudgment caused by human body temperature, improving the accuracy and stability of determining firing of the cooking apparatus 200, greatly reducing the start time of determining the cooking apparatus 200, quickly determining the start state of the cooking apparatus 200, automatically starting the range hood 110 more accurately, reducing air pollution, and being beneficial to the health of a user.
Specifically, the cooking appliance 200 includes, but is not limited to, a gas cooker, an induction cooker, and the like. The start detection device 100 of the cooking apparatus 200 of the present embodiment may be mounted on a household appliance such as the range hood 110, or may be mounted at another position above the cooking apparatus 200, which is not limited herein. In the case that the start detection device 100 detects that the cooking apparatus 200 is turned on, the start detection device 100 is used to control the range hood 110 to be started to absorb the oil smoke or the air conditioner to be started to cool the cooking environment, thereby providing a comfortable kitchen environment.
In one embodiment, referring to fig. 2, the controller 10 includes a temperature change rate determining portion 11, a trend line calculating portion 13, a trend line initializing portion 15, a trend line determining portion 17, a trend line preset ratio storing portion 19, and an opening control portion 40. The opening detection device 100 includes a temperature detection portion 20. The temperature change rate determining unit 11 is connected to the temperature detecting unit 20, the trend line calculating unit 13, and the trend line preset ratio storing unit 19. The trend line initialization unit 15 connects the trend line calculation unit 13, the trend line determination unit 17, and the temperature change rate determination unit 11. The trend line judging section 17 connects the start control section 40, the trend line initializing section 15 and the trend line preset ratio storing section 19.
Referring to fig. 3, in one embodiment, the temperature detecting portion 20 is configured to receive temperature data transmitted by the temperature sensor 22. The temperature sensor 22 may be disposed at the bottom of the range hood 110 above the cooking apparatus 200, and is preferably installed at the middle of the bottom of the range hood 110, as shown in fig. 3. The temperature sensor 22 may be an infrared temperature sensor 22. The infrared rays emitted from the temperature sensor 22 may be used to detect the temperature of the cooking apparatus 200. Of course, the temperature sensor 22 may be installed at other positions on the bottom of the range hood 110 or other positions of the range hood 110, or at other positions above the cooking apparatus 200, instead of on the range hood 110.
In the present embodiment, the actual temperature and the current ambient temperature of the cooking apparatus 200 are acquired, and it is understood that the temperature sensor 22 may simultaneously detect the actual temperature and the current ambient temperature of the cooking apparatus 200, and the temperature detection part 20 may receive data of the actual temperature and the current ambient temperature of the cooking apparatus 200 detected by the temperature sensor 22. The controller 10 may acquire data of the actual temperature and the current ambient temperature of the cooking apparatus 200 from the temperature detecting part 20.
Referring to fig. 4, in the present embodiment, in step S20, acquiring the initial temperature and the initial ambient temperature of the cooking apparatus 200 includes:
step S22, acquiring a temperature change rate of the cooking apparatus 200;
in step S26, in case that the temperature change rate is greater than the preset value, the current actual temperature of the cooking apparatus 200 is taken as the initial temperature of the cooking apparatus 200, and the current ambient temperature is taken as the initial ambient temperature.
The method for detecting the turning-on of the cooking appliance 200 of the above embodiment can be implemented by the turning-on detecting device 100 of the present embodiment. Steps S22, S24, and S26 may be implemented by the controller 10. That is, the controller 10 is configured to acquire a temperature change rate of the cooking apparatus 200, and in a case where the temperature change rate is greater than a preset value, a current actual temperature of the cooking apparatus 200 is an initial temperature of the cooking apparatus 200, and a current ambient temperature is an initial ambient temperature. Thus, the control accuracy of the cooking apparatus 200 can be improved.
Specifically, since the accuracy of the collected temperature data is low when cooking is started, in this embodiment, when the temperature change rate is greater than the preset value, the temperature change rate detection unit uses the current actual temperature of the cooking apparatus 200 as the initial temperature of the cooking apparatus 200 and uses the current ambient temperature as the initial ambient temperature, and then uses the initial temperature and the initial ambient temperature of the cooking apparatus 200 to perform subsequent calculation and determination, so that the control accuracy of the cooking apparatus 200 can be improved.
In the present embodiment, the cooking apparatus 200 is acquired before the cooking starts,temperature T of cooking apparatus 200 in a no-fire state before the moment of firingo
In the present embodiment, the current actual temperature T of the cooking apparatus 200jTemperature T of cooking apparatus 200oThe rate of change B in temperature between can be expressed as: b ═ Tj-To)/To. Under the condition that the temperature change rate B is greater than a preset value, the current actual temperature T is measuredjAs initial temperature Tobj0(ii) a The current ambient temperature ThAs initial temperature Tamb0. It should be noted that the preset value of the present embodiment can be set according to actual situations.
In this embodiment, referring to fig. 5, the method for detecting the start includes:
step S251, determining the power of the cooking apparatus 200 according to the temperature change rate;
in step S253, a preset value is acquired according to the fire of the cooking apparatus 200.
The method for detecting the turning-on of the cooking appliance 200 of the above embodiment can be implemented by the turning-on detecting device 100 of the present embodiment. Steps S251 and S253 can be implemented by the controller 10. That is, the controller 10 is configured to determine the power of the cooking apparatus 200 according to the temperature change rate, and acquire the preset value according to the power of the cooking apparatus 200. Thus, the preset value is thus acquired according to the power of the cooking apparatus 200, which can improve the accuracy of determining that the cooking apparatus 200 is on.
Specifically, when the cooking apparatus 200 fires with different firepower for cooking, there are differences in the rate of temperature change of the cooking apparatus 200. When the cooking apparatus 200 is fired with a large fire, the relative temperature of the cooking apparatus 200 is greatly increased with time. When the cooking apparatus 200 is fired with small fire power, the relative temperature of the cooking apparatus 200 is increased with time to a small extent. In this embodiment, the temperature may be measured after a period of time after the firing event, such as a sampling period and the relative temperature TdiffCorresponding rate of temperature change dTdiffdT according to the rate of change of temperature dTdiffThe magnitude of/dt judges whether the cooking apparatus 200 is cooking with a big fire or a small fire. In the present embodiment, the different fire power pairsDifferent preset values should be used. After the firepower is determined, the corresponding preset value is found according to the firepower.
In one embodiment, the cooking apparatus 200 is a gas range, and whether the cooking apparatus 200 is turned on is determined, which may be understood as whether the cooking apparatus 200 is turned on.
In the present embodiment, the initial temperature of the cooking apparatus 200, the actual temperature of the cooking apparatus 200, the initial ambient temperature, and the current ambient temperature are analyzed through a plurality of experiments in advance. Referring to fig. 6 and 7, the current temperature (T) of the cooking apparatus 200 of fig. 6 and 7obj) Refers to the temperature of the target cooking object within the detection range of the temperature sensor 22, the current ambient temperature (T)amb) Refers to the ambient temperature of the target cooking object as detected by the temperature sensor 22. t is t0Indicates a temperature change rate (dT) of the cooking apparatus 200objDt) greater than a predetermined value, tdIndicating the time at which the cooking appliance 200 is judged to be turned on (e.g., the time at which the gas range is turned on), and Δ T indicating the time required to judge that the cooking appliance 200 is turned on. T isobj0 and T amb0 each represents t0The initial temperature of the cooking apparatus 200 at the time and the initial ambient temperature.
In fig. 6, in a scene in which the cooking apparatus 200 cooks with fire power of a big fire, the temperature sensor 22 detects the current temperature (T) of the cooking apparatus 200obj) Curve L1 over time cooking device 200 current ambient temperature (T) detected by temperature sensor 22 in case of cooking with fire power of big fireamb) Curve L2 over time in fig. 7, the current temperature (T) of the cooking apparatus 200 detected by the temperature sensor 22 under the condition that the cooking apparatus 200 is not turned on and the human body approaches the temperature sensor 22obj) Curve L3 over time when the cooking device 200 is not turned on and a human body approaches the temperature sensor 22, the current ambient temperature (T) detected by the temperature sensor 22amb) Curve L4 over time, it can be seen from fig. 6 and 7 that in the two scenarios described above, the temperature changes of curve L1 and curve L3 are the same, whereas curve L2 and curve L4 differ, and cooking device 200 is turned on as compared to the ring when a human hand approaches the sensorThe ambient temperature is compared, and the rising speed of the ambient temperature corresponding to the condition that the cooking device 200 is turned on is faster, so that the analysis can easily distinguish the two scenes.
Therefore, through the above analysis, in the present embodiment, the first temperature variation curve and the second temperature variation curve are obtained, the first trend line of the first temperature variation curve and the second trend line of the second temperature variation curve are obtained, and whether the cooking device 200 is turned on is determined according to the first trend line and the second trend line, so that two scenes of misdetermination and normal cooking caused by the human body temperature can be accurately distinguished, and the accuracy of determining the turning on of the cooking device 200 is improved.
In the present embodiment, the relative temperature between the actual temperature of the cooking apparatus 200 and the initial temperature of the cooking apparatus 200 is calculated, and the first temperature change curve is generated according to the relative temperature. It can be understood that the actual temperature T of the cooking apparatus 200 is acquired in real timeobjCalculating the actual temperature T of the cooking apparatus 200objAnd initial temperature Tobj0Difference value T ofobj-Tobj0I.e. relative temperature Trel1And then the temperature change curve of the corresponding time period can be obtained.
In the present embodiment, the relative ambient temperature between the initial ambient temperature and the current ambient temperature is calculated and the second temperature change curve is generated based on the relative ambient temperature. It can be understood that the current ambient temperature T is obtained in real timeambCalculating the current ambient temperature TambAnd initial ambient temperature Tamb0Difference of (i.e. relative ambient temperature T)rel2
In this embodiment, referring to fig. 8, the first temperature variation curve includes a plurality of first curve segments, the second temperature variation curve includes a plurality of second curve segments, and step S60 includes:
step S62, obtaining a first trend line corresponding to each first curve segment and a second trend line corresponding to each second curve segment;
step S64, calculating a slope of the first trend line and a slope of the second trend line;
in step S66, it is determined whether the cooking apparatus 200 is turned on according to the slope of the first trend line and the slope of the second trend line.
The method for detecting the turning-on of the cooking appliance 200 of the above embodiment can be implemented by the turning-on detecting device 100 of the present embodiment. Steps S62, S64, and S66 may be implemented by the controller 10. That is, the controller 10 is configured to obtain a first trend line corresponding to each first curve segment and a second trend line corresponding to each second curve segment, calculate a slope of the first trend line and a slope of the second trend line, and determine whether the cooking apparatus 200 is turned on according to the slope of the first trend line and the slope of the second trend line. Thus, it is possible to quickly and accurately judge whether the cooking apparatus 200 is turned on.
In the present embodiment, a first trend line corresponding to each first curve segment is obtained and a slope of the first trend line is calculated, specifically, referring to fig. 9, the trend line calculating part 13 can calculate the sampling time duration tcheckA plurality of temperature sampling points can be arranged in the corresponding curve segment, namely a plurality of sampling time points can be arranged, and the relative temperature T is carried out at each sampling time pointrel1Sampling, e.g. at time t0Is the first sampling time point, time point t1For the second sampling time point, time point t2Is the third sampling time point · · t ·kFor the Kth sampling time point, acquiring corresponding relative temperature T at each sampling time pointrel1I.e. obtaining K relative temperatures T corresponding to K sampling time pointsrel1According to K relative temperatures T corresponding to K sampling time pointsrel1Fitting the sampling duration tcheckA corresponding first trend line. It should be understood that the first trend line corresponding to each first curve segment can be regarded as a straight line, for example, a straight line expressed in the form of y ═ ax + b, where y is the relative temperature corresponding to the sampling time point, and x is the sampling time point.
Specifically, the slope of the first trend line corresponding to each first curve segment can be calculated according to the following formula, such as the sampling time length tcheckSlope of the first trend line of the corresponding first curve segment:
a=[∑(xy)-∑(x)∑(y)/k]/[∑(xx)-∑(x)∑(x)/k]
wherein x is a sampling time point, e.g. a first sampling time point t0Y is the relative temperature T corresponding to the sampling time pointrel1E.g. first sampling time t0Corresponding relative temperature Trel1K is the number of temperature samples corresponding to each first curve segment, e.g. the sampling time period tcheckK sampling time points are included, K is K, ∑ (x) is the sum of time values, ∑ (xx) is the sum of time squares, ∑ (y) is the sum of relative temperatures, and ∑ (xy) is the sum of time multiplied by relative temperatures.
In this embodiment, a second trend line corresponding to each second curve segment is obtained and a slope of the second trend line is calculated, specifically, referring to fig. 10, a plurality of temperature sampling points, that is, a plurality of sampling time points, may be set in the curve segment corresponding to the sampling time duration Δ T, and a relative temperature T is performed at each sampling time pointrel2Sampling, e.g. at time t0Is the first sampling time point, time point t1For the second sampling time point, time point t2Is the third sampling time point · · t ·kFor the Kth sampling time point, acquiring corresponding relative temperature T at each sampling time pointrel2I.e. obtaining K relative temperatures T corresponding to K sampling time pointsrel2According to K relative temperatures T corresponding to K sampling time pointsrel2And fitting a second trend line corresponding to the sampling time length delta T. It should be understood that the second trend line corresponding to each second curve segment can be regarded as a straight line, for example, a straight line expressed in the form of y ═ ax + b, where y is the relative temperature corresponding to the sampling time point, and x is the sampling time point.
Specifically, the slope of the second trend line corresponding to each second curve segment, for example, the slope of the second trend line of the second curve segment corresponding to the sampling time duration Δ T, may be calculated according to the following formula:
a=[∑(xy)-∑(x)∑(y)/k]/[∑(xx)-∑(x)∑(x)/k]
wherein x is a sampling time point, e.g. a first sampling time point t0Y is the relative temperature T corresponding to the sampling time pointrel2For example, the phase corresponding to the first sampling time point t0To temperature Trel2K is the number of temperature samples corresponding to each second curve segment, for example, when there are K sampling time points within the sampling time duration Δ T, K is K, ∑ (x) is the sum of time values, ∑ (xx) is the sum of time squares, ∑ (y) is the sum of relative temperatures, and ∑ (xy) is the sum of time multiplied by relative temperatures.
In this embodiment, referring to fig. 11, step S66 includes:
in step S662, the cooking apparatus 200 is determined to be turned on when the slope of the first trend line is greater than or equal to the first preset ratio and the slope of the second trend line is greater than or equal to the second preset ratio.
The method for detecting the turning-on of the cooking appliance 200 of the above embodiment can be implemented by the turning-on detecting device 100 of the present embodiment. Step S662 may be implemented by the controller 10. That is, the controller 10 is configured to determine that the cooking apparatus 200 is turned on when the slope of the first trend line is greater than or equal to the first preset ratio and the slope of the second trend line is greater than or equal to the second preset ratio. Thus, it is possible to improve the accuracy of judging the turning-on of the cooking apparatus 200.
Specifically, in the case that the slope of the first trend line is greater than or equal to the first preset ratio, and the slope of the second trend line is greater than or equal to the second preset ratio, it indicates that the temperature of the cooking apparatus 200 and the ambient temperature rise faster at this time, that is, the cooking apparatus 200 is in the state of being just turned on at this time. Therefore, in the present embodiment, when the trend line determination unit 17 determines that the cooking appliance 200 satisfies the following two conditions, it determines that the cooking appliance 200 is turned on.
Starting condition 1: t is not less than tc, Slope of the second trend line (Slope)amb) Not less than the second preset ratio (Slope)amb_det);
The start-up condition 2: (t-t0) ═ tcheckSlope of the first trend line (Slope)obj) Not less than the first preset ratio (Slope)obj_det)。
Wherein, t0Indicates a temperature change rate (dT) of the cooking apparatus 200objDt) is greater than a predetermined value, and tc represents t in the above-described opening condition 10Is initially presetThe moment of the on duration. In order to distinguish between various situations such as the cooking apparatus 200 being on fire, the human hand approaching, the human body approaching, etc., to improve the reliability of the calculated second trend line, it is necessary to distinguish between the situations at t0After the preset starting time period, the Slope (Slope) of the second trend line is judgedamb) Whether it is greater than or equal to a second predetermined ratio (Slope)amb_det)。
In this embodiment, the trend line preset ratio storage unit 19 can be used for storing a first preset ratio and a second ratio. It is to be noted that, in the present embodiment, the settings of the first preset ratio and the second ratio are related to the power of the cooking apparatus 200. The first preset ratio is set to different values corresponding to different firepowers of the cooking apparatus 200, and at the same time, the first preset ratio is also set to different values corresponding to different values.
In this embodiment, the start detection method includes:
and under the condition that the slope of the first trend line is smaller than a third preset ratio, recalculating the slope of the first trend line and the slope of the second trend line.
The method of detecting the turning-on of the cooking apparatus 200 of the above embodiment may be implemented by the controller 10. The controller 10 is configured to recalculate the slope of the first trend line and the slope of the second trend line when the slope of the first trend line is smaller than a third preset ratio. Wherein the third predetermined ratio is smaller than the first predetermined ratio. In this way, the accuracy of calculating the slope of the first trend line and the slope of the second trend line may be improved, and thus the accuracy of determining whether the cooking apparatus 200 is turned on may be improved.
Specifically, the Slope at the first trend line is smaller than a third preset ratio (Slope)obj_min) In this case, the temperature change of the cooking apparatus 200 is small. The slope of the first trend line and the slope of the second trend line are recalculated, and it is understood that the trend line initializing section 15 will initialize the variables used to calculate the slopes of the first and second trend lines.
In this embodiment, the start detection method includes:
and under the condition that the time length for calculating the slope of the first trend line and the slope of the second trend line exceeds the preset time length, recalculating the slope of the first trend line and the slope of the second trend line.
The method of detecting the turning-on of the cooking apparatus 200 of the above embodiment may be implemented by the controller 10. The controller 10 is configured to recalculate the slope of the first trend line and the slope of the second trend line if the time period for calculating the slope of the first trend line and the slope of the second trend line exceeds a preset time period. In this way, the accuracy of calculating the slope of the first trend line and the slope of the second trend line may be improved, and thus the accuracy of determining whether the cooking apparatus 200 is turned on may be improved.
Specifically, in the case where the time period for calculating the slope of the first trend line and the slope of the second trend line exceeds the preset time period, the slope of the first trend line and the slope of the second trend line are recalculated, and it is understood that, in the case where the time period for calculating the slope of the first trend line and the slope of the second trend line exceeds the preset time period, the trend line initializing section 15 will initialize the variables used for calculating the slope of the first trend line and the slope of the second trend line.
In this embodiment, the start detection method includes:
and controlling the range hood 110 to be started under the condition that the cooking device 200 is judged to be started.
The method of detecting the turning-on of the cooking apparatus 200 of the above embodiment may be implemented by the controller 10. The controller 10 is configured to control the range hood 110 to be turned on when the cooking apparatus 200 is determined to be turned on. Therefore, the range hood 110 can be quickly opened, and the user experience is improved.
Specifically, in the case of determining that the cooking apparatus 200 is turned on, the turn-on control part 40 may control the range hood 110 to be automatically turned on to suck the oil smoke.
Referring to fig. 3, a range hood 110 is further provided in the present embodiment. The range hood 110 includes the opening detection device 100 according to any of the above embodiments.
In the range hood 110 of the above embodiment, whether the cooking device 200 is turned on is determined by the first trend line of the first temperature change curve and the second trend line of the second temperature change curve, so that the probe of the human body approaching the temperature sensor 22 and the firing scene of the cooking device 200 can be distinguished, thereby effectively preventing misjudgment caused by human body temperature, improving the accuracy and stability of determining firing of the cooking device 200, greatly reducing the turn-on time of determining the cooking device 200, rapidly determining the turn-on state of the cooking device 200, automatically turning on the range hood 110 more accurately, reducing air pollution, and being beneficial to the health of a user.
Specifically, the range hood 110 includes, but is not limited to, an upper-row range hood 110, a lower-row range hood 110, a side-draft range hood 110, and the like.
In this embodiment, the controller 10 of the above embodiment may be a controller of the range hood 110. In other embodiments, the control device may be separately manufactured, the control device includes the controller 10, the separate control device may be installed in the range hood 110, or may be installed at another location outside the range hood 110, and the control device may communicate with the controller 10 of the range hood 110 itself through a wired or wireless communication manner. It is understood that in other embodiments, the opening detection device may also be applied to other kitchen appliances, such as electric cookers, microwave ovens, washing appliances, refrigerators, and the like.
Referring to fig. 12, a computer-readable storage medium 300 according to an embodiment of the present invention includes computer-readable instructions, and when the computer-readable instructions are executed by the processor 400, the processor 400 executes the opening detection method according to any one of the above embodiments.
For example, referring to fig. 1, the computer readable instructions, when executed by the processor 400, cause the processor 400 to perform the steps of:
step S20, acquiring an initial temperature of the cooking apparatus 200, an actual temperature of the cooking apparatus 200, an initial ambient temperature, and a current ambient temperature;
step S40 of calculating a relative temperature between an actual temperature of the cooking appliance 200 and an initial temperature of the cooking appliance 200 and generating a first temperature change curve according to the relative temperature, and calculating a relative ambient temperature between the initial ambient temperature and a current ambient temperature and generating a second temperature change curve according to the relative ambient temperature;
in step S60, it is determined whether the cooking apparatus 200 is turned on according to the first trend line of the first temperature variation curve and the second trend line of the second temperature variation curve.
In the computer-readable storage medium 300 of the above embodiment, whether the cooking device 200 is turned on is determined by the first trend line of the first temperature variation curve and the second trend line of the second temperature variation curve, so that the probe of the human body approaching the temperature sensor 22 and the firing scene of the cooking device 200 can be distinguished, thereby effectively preventing misjudgment caused by human body temperature, improving the accuracy and stability of determining firing of the cooking device 200, greatly reducing the turn-on time of determining the cooking device 200, quickly determining the turn-on state of the cooking device 200, automatically turning on the range hood 110 more accurately, reducing air pollution, and being beneficial to the health of a user.
Specifically, the processor 400 may be a processor included in the controller 10 of the opening detection apparatus 100. The computer readable storage medium 300 may be installed in the cooking appliance 200 or the range hood 110, or may be installed in another terminal, and the cooking appliance 200 communicates with the terminal to obtain the computer readable instructions. The communication may be wireless communication or wired communication. Terminals include, but are not limited to, cell phones, tablets, personal computers, servers, wearable smart devices, other household appliances, and the like.
In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processing module-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of embodiments of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (11)

1. An opening detection method of a cooking apparatus, the opening detection method comprising:
acquiring an initial temperature of the cooking equipment, an actual temperature of the cooking equipment, an initial ambient temperature and a current ambient temperature;
calculating a relative temperature between an actual temperature of the cooking equipment and an initial temperature of the cooking equipment, generating a first temperature change curve according to the relative temperature, calculating a relative ambient temperature between the initial ambient temperature and the current ambient temperature, and generating a second temperature change curve according to the relative ambient temperature;
and judging whether the cooking equipment is started or not according to the first trend line of the first temperature change curve and the second trend line of the second temperature change curve.
2. The opening detection method according to claim 1, wherein acquiring an initial temperature and an initial ambient temperature of the cooking appliance comprises:
acquiring the temperature change rate of the cooking equipment;
and under the condition that the temperature change rate is larger than a preset value, taking the current actual temperature of the cooking equipment as the initial temperature of the cooking equipment, and taking the current environment temperature as the initial environment temperature.
3. The opening detection method according to claim 2, characterized in that the opening detection method comprises:
determining the firepower of the cooking equipment according to the temperature change rate;
and acquiring the preset value according to the firepower of the cooking equipment.
4. The opening detection method according to claim 1, wherein the first temperature variation curve includes a plurality of first curve segments, the second temperature variation curve includes a plurality of second curve segments, and the determining whether the cooking device is opened according to a first trend line of the first temperature variation curve and a second trend line of the second temperature variation curve comprises:
acquiring the first trend line corresponding to each first curve segment and the second trend line corresponding to each second curve segment;
calculating the slope of the first trend line and the slope of the second trend line;
and judging whether the cooking equipment is started or not according to the slope of the first trend line and the slope of the second trend line.
5. The opening detection method of claim 4, wherein determining whether the cooking device is opened according to the slope of the first trend line and the slope of the second trend line comprises:
and judging that the cooking equipment is started under the condition that the slope of the first trend line is greater than or equal to a first preset ratio and the slope of the second trend line is greater than or equal to a second preset ratio.
6. The opening detection method according to claim 5, characterized in that the opening detection method comprises:
and under the condition that the slope of the first trend line is smaller than a third preset ratio, recalculating the slope of the first trend line and the slope of the second trend line, wherein the third preset ratio is smaller than the first preset ratio.
7. The opening detection method according to claim 4, characterized in that the opening detection method comprises:
and under the condition that the time length for calculating the slope of the first trend line and the slope of the second trend line exceeds the preset time length, recalculating the slope of the first trend line and the slope of the second trend line.
8. The opening detection method according to claim 1, characterized in that the opening detection method comprises:
and controlling the range hood to be started under the condition of judging that the cooking equipment is started.
9. An opening detection device of a cooking apparatus, characterized in that the opening detection device comprises a controller for performing the opening detection method of any of the above 1-8.
10. A range hood comprising the opening detection device of the cooking apparatus of claim 9.
11. A non-transitory computer-readable storage medium containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the opening detection method of any one of claims 1-8.
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