CN111412504A - 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 PDFInfo
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- CN111412504A CN111412504A CN202010246179.4A CN202010246179A CN111412504A CN 111412504 A CN111412504 A CN 111412504A CN 202010246179 A CN202010246179 A CN 202010246179A CN 111412504 A CN111412504 A CN 111412504A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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Abstract
The invention discloses a starting detection method and device, a range hood and a storage medium. The opening detection method comprises the following steps: acquiring the actual temperature of the cooking equipment and the initial temperature of the cooking equipment; acquiring a relative temperature between an actual temperature of the cooking equipment and an initial temperature of the cooking equipment, and generating a temperature change curve according to the relative temperature; acquiring the slope of a trend line corresponding to the temperature change curve and the intercept of the trend line; acquiring the slope change rate of the trend line according to the slope of the trend line, and acquiring the intercept change rate of the trend line according to the intercept of the trend line; and judging whether the cooking equipment is started or not according to the slope of the trend line, the slope change rate of the trend line and the intercept change rate of the trend line. According to the method for detecting the opening of the cooking equipment, whether the cooking equipment is opened or not can be accurately identified, misjudgment caused by the influence of the temperature of a human body is effectively avoided, the time for judging the opening of the cooking equipment is shortened, the performance for detecting the opening of the cooking equipment is improved, the opening of the cooking equipment is judged more stably, and the user experience is improved.
Description
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 a cooking device, a range hood and a storage medium.
Background
In the related art, the range hood usually adopts a temperature limit value or a temperature change rate method to determine whether the cooking device is on fire. Under the condition of judging by adopting the temperature limit value, the preset temperature limit value is larger, and the starting time of the range hood is longer after the cooking equipment is started. The preset temperature limit value is lower than the normal temperature of a human body, and the range hood is easy to be started by mistake under the condition that the human body is close to the range hood. Under the condition that the temperature change rate is adopted for judgment, if the preset temperature change rate value is large, whether the cooking equipment is on fire or not is difficult to detect when the cooking equipment works with small firepower, the range hood cannot be automatically started, and the user experience is influenced.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting the starting of cooking equipment, a range hood and a storage medium.
The opening detection method of the embodiment of the invention comprises the following steps:
acquiring an actual temperature of the cooking equipment and an initial temperature of the cooking equipment;
acquiring a relative temperature between an actual temperature of the cooking equipment and an initial temperature of the cooking equipment, and generating a temperature change curve according to the relative temperature;
acquiring the slope of a trend line corresponding to the temperature change curve and the intercept of the trend line;
acquiring the slope change rate of the trend line according to the slope of the trend line, and acquiring the intercept change rate of the trend line according to the intercept of the trend line;
and judging whether the cooking equipment is started or not according to the slope of the trend line, the slope change rate of the trend line and the intercept change rate of the trend line.
In the method for detecting the opening of the cooking device in the embodiment, whether the cooking device is opened or not is judged according to the slope of the trend line, the slope change rate of the trend line and the intercept change rate of the trend line, so that whether the cooking device is opened or not can be accurately identified, misjudgment caused by the influence of the temperature of a human body is effectively avoided, the time for judging the opening of the cooking device is shortened, the performance of detecting the opening of the cooking device is improved, the opening of the cooking device is judged more stably, and the user experience is improved.
In some embodiments, obtaining an initial temperature of the cooking appliance comprises: calculating a rate of temperature change of the cooking device; and under the condition that the temperature change rate of the cooking equipment is greater than a preset temperature change rate, taking the current temperature of the cooking equipment as the initial temperature of the cooking equipment. Thus, the accuracy of judging the opening of the cooking device can be improved.
In certain embodiments, the control method comprises: determining the firepower of the cooking equipment according to the temperature change rate; and acquiring the preset temperature change rate according to the firepower of the cooking equipment. Thus, the accuracy of judging the firing of the cooking equipment can be improved.
In some embodiments, the obtaining the slope of the trend line and the intercept of the trend line corresponding to the temperature change curve includes: acquiring the trend line corresponding to each curve segment; and calculating the slope of the trend line and the intercept of the trend line. Thus, the slope of the trend line and the intercept of the trend line can be accurately obtained.
In some embodiments, obtaining a slope rate of change of the trend line according to the slope of the trend line includes: under the condition that the time length for calculating the slope change rate of the trend line is less than or equal to a first preset time length, setting the slope change rate of the trend line as a first preset value; acquiring a first slope of the trend line corresponding to the ending moment of the first preset duration; and under the condition that the time length for calculating the slope change rate of the trend line is greater than the first preset time length, the slope change rate of the trend line is the ratio of the current slope of the trend line to the first slope of the trend line. Therefore, the calculation of the slope change rate of the acquired trend line is simple and is closer to the actual situation, and the accuracy of judging the opening of the cooking equipment is higher.
In some embodiments, obtaining the intercept change rate of the trend line from the intercept of the trend line comprises: under the condition that the time length for calculating the intercept change rate of the trend line is less than or equal to a first preset time length, setting the intercept change rate of the trend line to be a second preset value; and under the condition that the time length for calculating the slope change rate of the trend line is greater than the first preset time length, the intercept change rate of the trend line is the ratio of the current intercept of the trend line to the relative temperature. Therefore, the intercept change rate of the acquired trend line is simple to calculate and is closer to the actual condition, and the accuracy of judging the opening of the cooking equipment is higher.
In some embodiments, determining whether the cooking device is turned on according to the slope of the trend line, the rate of change of the slope of the trend line, and the rate of change of the intercept of the trend line includes: and under the conditions that the slope of the trend line is greater than or equal to a first preset slope, the slope change rate of the trend line is greater than or equal to a first preset slope change rate, and the intercept change rate of the trend line is smaller than a first preset intercept change rate, judging that the cooking equipment is started. Therefore, whether the cooking equipment is started or not is judged by combining the slope of the trend line, the slope change rate of the trend line and the intercept change rate of the trend line, and the accuracy is higher.
In some embodiments, the turn-on detection method comprises: under the condition that the slope of the trend line is smaller than a second preset slope, recalculating the slope of the trend line, wherein the second preset slope is smaller than the first preset slope; or under the condition that the intercept change rate of the trend line is greater than a second preset intercept change rate, recalculating the intercept change rate of the trend line, wherein the second preset intercept change rate is greater than the first preset intercept change rate; or under the condition that the time length for calculating the slope change rate of the trend line and the intercept change rate of the trend line is greater than or equal to a second preset time length, recalculating the slope change rate of the trend line and the intercept change rate of the trend line. Thus, the accuracy of judging whether the cooking device is turned on or not can be improved.
The embodiment of the invention also 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.
In the above-mentioned embodiment's the detection device that opens of cooking equipment, whether the cooking equipment opens is judged according to the slope of trend line, the slope rate of change of trend line and the intercept rate of change of trend line, can accurately discern whether the cooking equipment opens like this, effectively avoids the misjudgment of human body temperature influence, reduces the time that the cooking equipment opened the judgement, improves the performance of opening the detection to the cooking equipment, judges more steadily that the cooking equipment opens, promotes user's experience.
The embodiment of the invention also provides a range hood which comprises the starting detection device of the cooking equipment in the embodiment.
Among the range hood of above-mentioned embodiment, judge whether cooking equipment opens according to the slope of trend line, the slope rate of change of trend line and the intercept rate of change of trend line, whether can accurately discern cooking equipment opens like this, effectively avoid the misjudgement of human body temperature influence, reduce cooking equipment and open the time of judging, improve and open the performance that detects to cooking equipment, judge cooking equipment and open more steadily, and under the condition that detects cooking equipment and open, range hood can open automatically fast, user experience has been promoted.
Embodiments of the present invention also provide a non-transitory computer-readable storage medium containing computer-executable instructions, which, when executed by one or more processors, cause the processors to perform the opening 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 determined according to the slope of the trend line, the slope change rate of the trend line, and the intercept change rate of the trend line, so that whether the cooking device is turned on can be accurately identified, misdetermination caused by human body temperature influence is effectively avoided, the time for turning on and determining the cooking device is shortened, the performance of turning on and detecting the cooking device is improved, turning on of the cooking device is more stably determined, and user experience is improved.
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 of a cooking apparatus 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 a graph of a variation with time of an actual temperature of the cooking appliance detected by the temperature sensor and a variation with time of a temperature change rate of the cooking appliance in a case where the cooking appliance is turned on with a small fire.
Fig. 5 is a graph of a variation with time of an actual temperature of the cooking appliance detected by the temperature sensor and a variation with time of a temperature change rate of the cooking appliance in a case where the cooking appliance is turned on with a big fire.
Fig. 6 is a graph of a change in an actual temperature of the cooking appliance over time and a change in a rate of change in a temperature of the cooking appliance over time, which are detected by the temperature sensor, in a case where a body of a user blocks the temperature sensor.
Fig. 7 is a graph of a change in an actual temperature of the cooking appliance over time and a change in a rate of change in a temperature of the cooking appliance over time, which are detected by the temperature sensor, in a case where a body of a user passes the temperature sensor.
Fig. 8 is another flowchart of a method for detecting the turn-on of a cooking appliance according to an embodiment of the present invention.
Fig. 9 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. 10 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. 11 is a schematic diagram of a temperature variation curve and a trend line of a cooking apparatus according to an embodiment of the present invention.
Fig. 12 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. 13 is still another flowchart of a method for detecting the turning-on of a cooking apparatus according to an embodiment of the present invention.
Fig. 14 is a graph of a temperature change rate with time, a graph of a temperature with time, and a trend line of a cooking apparatus according to an embodiment of the present invention.
FIG. 15 is a graph of the slope of a trend line versus time and a graph of the intercept of the trend line versus time for an embodiment of the present invention.
FIG. 16 is a graph of the rate of change of trend line slope versus time and the rate of change of trend line intercept versus time for an embodiment of the present invention.
FIG. 17 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 start detection device 100, the controller 10, the temperature change rate determination unit 11, the trend line characteristic calculation unit 13, the trend line initialization determination unit 15, the trend line characteristic determination unit 17, the start control unit 18, the trend line characteristic determination value storage unit 19, the temperature detection unit 20, the temperature sensor 22, the range hood 110, the cooking appliance 200, the computer-readable storage medium 300, and the processor 400.
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 according to the embodiment of the present invention. The method for detecting the turn-on of the cooking apparatus 200 includes:
step S10, acquiring an actual temperature of the cooking apparatus 200 and an initial temperature of the cooking apparatus 200;
step S30, acquiring a relative temperature between an actual temperature of the cooking apparatus 200 and an initial temperature of the cooking apparatus 200, and generating a temperature change curve according to the relative temperature;
step S50, obtaining the slope of the trend line corresponding to the temperature change curve and the intercept of the trend line;
step S70, obtaining the slope change rate of the trend line according to the slope of the trend line, and obtaining the intercept change rate of the trend line according to the intercept of the trend line;
in step S90, it is determined whether the cooking apparatus 200 is turned on according to the slope of the trend line, the slope change rate of the trend line, and the intercept change rate of the 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 cooking appliance 200 of the present embodiment. The opening detection device 100 includes a controller 10. The steps S10, S30, S50, S70 and S90 can be implemented by the controller 10. That is, the controller 10 is configured to obtain an actual temperature of the cooking apparatus 200 and an initial temperature of the cooking apparatus 200, obtain a relative temperature between the actual temperature of the cooking apparatus 200 and the initial temperature of the cooking apparatus 200, generate a temperature change curve according to the relative temperature, obtain a slope of a trend line corresponding to the temperature change curve and an intercept of the trend line, obtain a slope change rate of the trend line according to the slope of the trend line, obtain an intercept change rate of the trend line according to the intercept of the trend line, and determine whether the cooking apparatus 200 is turned on according to the slope of the trend line, the slope change rate of the trend line, and the intercept change rate of the trend line.
In the method and device 100 for detecting the opening of the cooking apparatus 200 according to the above embodiment, whether the cooking apparatus 200 is opened or not is determined according to the slope of the trend line, the slope change rate of the trend line, and the intercept change rate of the trend line, so that whether the cooking apparatus 200 is opened or not can be accurately identified, misdetermination due to influence of human body temperature can be effectively avoided, the time for determining the opening of the cooking apparatus 200 is shortened, the performance of detecting the opening of the cooking apparatus 200 is improved, the cooking apparatus 200 is more stably determined to be opened, and the user experience is improved.
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 started, the start detection device 100 is used to control the range hood 110 to start to suck the oil smoke.
In the present embodiment, referring to fig. 2, the opening detection device 100 includes a temperature detection portion 20, and the controller 10 includes a temperature change rate determination portion 11, a trend line characteristic calculation portion 13, a trend line initialization determination portion 15, a trend line characteristic determination portion 17, and a trend line characteristic determination value storage portion 19. The temperature change rate determining unit 11 is connected to the temperature detecting unit 20, the trend line characteristic calculating unit 13, and the trend line characteristic determining value storing unit 19. The trend line initialization determining unit 15 is connected to the temperature change rate unit, the trend line characteristic calculating unit 13, and the trend line characteristic determining unit 17. The trend line characteristic determining section 17 is connected to the trend line characteristic determining storage section.
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 temperature variation trend characteristics of the cooking apparatus 200 under different scenes are analyzed through a plurality of experiments in advance, please refer to fig. 4 to 7, where fig. 4 shows the actual temperature (T) of the cooking apparatus 200 detected by the temperature sensor 22 when the cooking apparatus 200 is turned on with a small fireobj) Time-dependent change curve L1 and temperature change rate (dT) of cooking apparatus 200objDt) curve L2 over time fig. 5 shows the cooking device 200 being turned on with a big fireUnder the condition, the actual temperature (T) of the cooking appliance 200 detected by the temperature sensor 22obj) Time-dependent curve L3 and temperature change rate (dT) of cooking apparatus 200objDt) versus time curve L4 fig. 6 shows the actual temperature (T) of the cooking device 200 detected by the temperature sensor 22 in the case where the user's body blocks the temperature sensor 22obj) Time-dependent curve L5 and temperature change rate (dT) of cooking apparatus 200objDt) versus time curve L6 fig. 7 shows the actual temperature (T) of cooking device 200 detected by temperature sensor 22 when the body of the user passes temperature sensor 22obj) Time-dependent curve L7 and temperature rate of change (dT) of cooking device 200objDt) of the cooking apparatus 200, as can be seen from fig. 4 to 7, the temperature variation trend of the cooking apparatus 200 is different in different situations, and thus, in order to accurately determine the turning-on of the cooking apparatus 200, the present invention may accurately determine whether the cooking apparatus 200 is turned on through the steps S10, S30, S50, S70, and S90 of the above embodiment by analyzing the temperature variation trend characteristics of the cooking apparatus 200 in different situations.
Specifically, in the present embodiment, the actual temperature of the cooking apparatus 200 is acquired, and it is understood that the temperature sensor 22 may detect the actual temperature of the cooking apparatus 200, and the temperature detection part 20 may receive the actual temperature of the cooking apparatus 200 detected by the temperature sensor 22. The controller 10 may acquire the actual temperature of the cooking apparatus 200 from the temperature detecting part 20.
In this embodiment, referring to fig. 8, in step S10, acquiring the initial temperature of the cooking apparatus 200 includes:
step S12, calculating a temperature change rate of the cooking apparatus 200;
in step S14, in case the temperature change rate of the cooking apparatus 200 is greater than the preset temperature change rate, the current temperature of the cooking apparatus 200 is used as the initial temperature 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. The steps S12 and S14 can be implemented by the controller 10. The controller 10 is configured to calculate a temperature change rate of the cooking apparatus 200, and in a case where the temperature change rate of the cooking apparatus 200 is greater than a preset temperature change rate, a current temperature of the cooking apparatus 200 is used as an initial temperature of the cooking apparatus 200. Thus, it is possible to improve the accuracy of judging the turning-on of the cooking apparatus 200.
Specifically, since the accuracy of the collected temperature data is low immediately after the cooking is started, in the present embodiment, the current actual temperature of the cooking apparatus 200 is used as the initial temperature of the cooking apparatus 200 only when the temperature change rate is greater than the preset temperature change rate. The calculation process of the temperature change rate of the cooking apparatus 200 may be: e.g. one sample duration tcheckFor the sampling time tcheckThe inner temperature profile is derived. That is, the sampling duration tcheckRelative temperature T of the insidediffCorresponding temperature change rate dTdiffAnd/dt. In the case where the temperature change rate of the cooking apparatus 200 is greater than the preset temperature change rate, it is described that the temperature change degree of the cooking apparatus 200 is large at this time, and in this case, the current temperature of the cooking apparatus 200 is taken as the initial temperature of the cooking apparatus 200.
In this embodiment, referring to fig. 9, the control method includes:
step S131 of determining the power of the cooking apparatus 200 according to the temperature change rate;
in step S133, a preset temperature change rate is acquired according to the heating power 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. The steps S131 and S133 can be implemented by the controller 10. The controller 10 is configured to determine the heating power of the cooking apparatus 200 according to the temperature change rate, and acquire a preset temperature change rate according to the heating power of the cooking apparatus 200. Thus, it is possible to improve the accuracy of judging the turning-on of the cooking apparatus 200.
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 at any timeThe variation will be greatly improved. 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 this embodiment, different firepower corresponds to different preset temperature change rates. And after the firepower is determined, finding the corresponding preset temperature change rate according to the firepower.
In this embodiment, referring to fig. 10, the temperature variation curve includes a plurality of curve segments, and step S50 includes:
step S52, obtaining a trend line corresponding to each curve segment;
in step S54, the slope of the trend line and the intercept of the trend line are calculated.
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 steps S52 and S54 can be implemented by the controller 10. The controller 10 is configured to obtain a trend line corresponding to each curve segment, and calculate a slope of the trend line and an intercept of the trend line. Thus, the slope of the trend line and the intercept of the trend line can be accurately obtained.
Specifically, in step S52, obtaining a trend line corresponding to each curve segment includes: acquiring the distribution condition of each temperature sampling point on each curve section; and generating a corresponding trend line according to the distribution condition of each temperature sampling point on each curve section.
That is, as shown in fig. 11, the sampling period t may be set to be longcheckA 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 pointrelSampling, 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, at each samplingAcquiring corresponding relative temperature T at time pointrelI.e. obtaining K relative temperatures T corresponding to K sampling time pointsrelAccording to K relative temperatures T corresponding to K sampling time pointsrelFitting the sampling duration tcheckCorresponding trend lines. It should be understood that the trend line corresponding to each 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 trend line characteristic calculating section 13 may calculate the slope of the trend line and the intercept of the trend line for each curve segment according to the following formulas. E.g. sample duration tcheckSlope of the trend line of the corresponding curve segment:
a＝[∑(xy)-∑(x)∑(y)/k]/[∑(xx)-∑(x)∑(x)/k]；
sampling duration tcheckIntercept of trend line of corresponding curve segment:
b＝[∑(y)–a∑(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 pointrelE.g. first sampling time t0Corresponding relative temperature TrelK is the number of temperature samples corresponding to each 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, referring to fig. 12, in step S70, obtaining a slope rate of change of the trend line according to the slope of the trend line includes:
step S71, setting the slope change rate of the trend line as a first preset value under the condition that the time length for calculating the slope change rate of the trend line is less than or equal to a first preset time length;
step S73, obtaining a first slope of a trend line corresponding to the end time of the first preset duration;
in step S75, when the duration of calculating the slope change rate of the trend line is greater than a first preset duration, the slope change rate of the trend line is a ratio of the current slope of the trend line to the first slope of the 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. The steps S71, S73 and S75 may be implemented by the controller 10. The controller 10 is configured to set the slope change rate of the trend line to a first preset value when the time length for calculating the slope change rate of the trend line is less than or equal to a first preset time length, obtain a first slope of the trend line corresponding to the end time of the first preset time length, and set the slope change rate of the trend line to a ratio of a current slope of the trend line to the first slope of the trend line when the time length for calculating the slope change rate of the trend line is greater than the first preset time length. In this way, the calculation of the slope change rate of the trend line acquired in this way is simple and closer to the actual situation, so that the accuracy of judging the turning-on of the cooking apparatus 200 is higher.
Specifically, in the present embodiment, in the case where the time period for calculating the slope change rate of the trend line is less than or equal to the first preset time period, the slope change rate of the trend line is set to the first preset value, and it can be understood that, in the case where the time period for calculating the slope change rate of the trend line is less than or equal to the first preset time period, the trend line characteristic calculating portion 13 makes the temperature data of the cooking apparatus 200 unstable, and is likely to cause erroneous judgment, and therefore, in this case, the slope change rate of the trend line is directly set to the first preset value, which can improve the efficiency of the controller 10 in processing the operation. Preferably, the first preset value may be set to a relatively large preset value, for example, to r.
In the present embodiment, the first slope of the trend line corresponding to the end time of the first preset time period is acquired, and it can be understood that the trend line characteristic calculation unit 13 starts to calculate t of the slope change rate of the trend line0The time passes through a first preset time length and an ending time t corresponding to the first preset time length0Calculating a first Slope corresponding to the moment according to a calculation formula of the Slope of the trend linecheck。
In this embodiment, when the time length for calculating the slope change rate of the trend line is longer than the first preset time length, the slope change rate of the trend line is the ratio of the current slope of the trend line to the first slope of the trend line, and it can be understood that the data indicating the slope change rate of the trend line at this time is easy to determine whether the cooking apparatus 200 is turned on when the time length for calculating the slope change rate of the trend line is longer than the first preset time length, and in this case, the slope change rate of the trend line is calculated according to the formula of the slope change rate of the trend line.
The formula for the rate of change of slope of the trend line is: slope (t) ([ Slope (t)/Slope)check]x 100%, wherein R.Slope (t) is R.Slope (t), Slope (t) is the current Slope of the trend line, and SlopecheckIs the first slope of the trend line.
In this embodiment, referring to fig. 12, in step S70, the obtaining the intercept change rate of the trend line according to the intercept of the trend line includes:
step S77, setting the intercept change rate of the trend line as a second preset value under the condition that the time length for calculating the intercept change rate of the trend line is less than or equal to a first preset time length;
in step S79, when the time length for calculating the slope change rate of the trend line is greater than a first preset time length, the intercept change rate of the trend line is the ratio of the current intercept to the relative temperature of the 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. The steps S77 and S79 can be implemented by the controller 10. The controller 10 is configured to set the intercept change rate of the trend line to a second preset value when a time length for calculating the intercept change rate of the trend line is less than or equal to a first preset time length, and set the intercept change rate of the trend line to a ratio of a current intercept to a relative temperature of the trend line when a time length for calculating a slope change rate of the trend line is greater than the first preset time length. In this way, the calculation of the intercept change rate of the trend line thus acquired is simple and closer to the actual situation, so that the accuracy of determining the turning-on of the cooking apparatus 200 is higher.
Specifically, in the present embodiment, in the case where the time length for calculating the intercept change rate of the trend line is less than or equal to the first preset time length, the intercept change rate of the trend line is set to the second preset value, and it can be understood that, in the case where the time length for calculating the intercept change rate of the trend line is less than or equal to the first preset time length, the trend line characteristic calculating portion 13 makes the temperature data of the cooking apparatus 200 unstable and is liable to cause erroneous judgment, and therefore, in this case, the intercept change rate of the trend line is directly set to the second preset value, which can improve the efficiency of the controller 10 in processing the operation. Preferably, the second preset value may be set to a relatively small preset value, for example, may be set to 0.
In this embodiment, when the time length for calculating the slope change rate of the trend line is longer than a first preset time length, the intercept change rate of the trend line is the ratio of the current slope of the trend line to the relative temperature. It is understood that the data describing the intercept change rate of the trend line at this time facilitates the judgment of whether the cooking apparatus 200 is turned on in the case where the time period for calculating the intercept change rate of the trend line is longer than the first preset time period, in which case the intercept change rate of the trend line is calculated according to the formula of the intercept change rate of the trend line. The formula of the intercept change rate of the trend line is: r. offset (t) ═ offset (t)/Tobj 0 (Tobj (t) -Tobj0) ] x 100%, where r.offset (t) is the intercept change rate of the trend line, offset (t) is the current intercept of the trend line, Tobj (t) is the current actual temperature of cooking apparatus 200, and Tobj0 is the initial temperature of cooking apparatus 200.
In this embodiment, referring to fig. 13, step S90 includes:
in step S92, the cooking apparatus 200 is determined to be turned on when the slope of the trend line is greater than or equal to the first predetermined slope, the slope change rate of the trend line is greater than or equal to the first predetermined slope change rate, and the intercept change rate of the trend line is less than the first predetermined intercept change rate.
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. Here, step S92 may be implemented by the controller 10. The controller 10 is configured to determine that the cooking apparatus 200 is turned on when a slope of the trend line is greater than or equal to a first preset slope, a slope change rate of the trend line is greater than or equal to a first preset slope change rate, and an intercept change rate of the trend line is less than the first preset intercept change rate. In this way, whether the cooking apparatus 200 is turned on or not is judged by combining the slope of the trend line, the slope change rate of the trend line and the intercept change rate of the trend line, so that the accuracy is higher.
Specifically, referring to fig. 2, the trend line characteristic determination value storage unit 19 is connected to the temperature change rate determination unit 11. The potential line characteristic determination value storage unit stores a first preset Slope (Slope) of a trend line characteristic of a temperature change curve of the cooking appliance 200 when determining that the cooking appliance 200 performs an opening operation, based on a temperature change rate of the cooking appliance 200 at a time when execution of the algorithm is starteddet) A first predetermined slope rate of change (r. slope)det) And a first predetermined intercept change rate (rdet) Wherein the temperature change rates of the cooking appliance 200 at different times when the algorithm starts to be executed correspond to different first preset slopes (Slope)det) A first predetermined slope rate of change (r. slope)det) And a first predetermined intercept change rate (rdet)。
In the present embodiment, the first preset Slope (Slope) is set to be the first preset Slope (Slope)det) A first predetermined slope rate of change (r. slope)det) And a first predetermined intercept change rate (rdet) The equation may be a constant or may be an equation function with one or more dimensions, and is not limited herein.
In this embodiment, after the first preset time period of the above embodiment, the trend line characteristic determining unit 17 may obtain the slope of the trend line, the slope change rate of the trend line, and the intercept change rate of the trend line, and determine that the cooking apparatus 200 is turned on when the slope of the trend line, the slope change rate of the trend line, and the intercept change rate of the trend line satisfy the following condition 1, where the condition 1 is: the Slope (Slope) of the trend line is not less than a first preset Slope (Slope)det) And the slope change rate (R.slope) of the trend line is more than or equal to a first preset slope change rate (R.slope)det) And rate of change of intercept (R.offset) of trend line<First stepSet intercept change rate (r.offset)det)。
It should be noted that, under any condition that the slope of the trend line is smaller than the first preset slope, or the slope change rate of the trend line is smaller than the first preset slope change rate, or the intercept change rate of the trend line is greater than or equal to the first preset intercept change rate, it is determined that the cooking apparatus 200 is not turned on.
In this embodiment, the start detection method includes: and under the condition that the slope of the trend line is smaller than a second preset slope, recalculating the slope of the trend line, wherein the second preset slope is smaller than the first preset slope.
The method of detecting the turning-on of the cooking apparatus 200 of the above embodiment may be implemented by the controller 10 of the present embodiment. The controller 10 is configured to recalculate the slope of the trend line if the slope of the trend line is smaller than a second preset slope. Wherein the second preset slope is smaller than the first preset slope. Thus, the accuracy of calculating the slope of the trend line can be improved, and the accuracy of determining whether the cooking apparatus 200 is turned on can be improved.
Specifically, when the slope of the trend line is smaller than the second preset slope, it indicates that at this time, the temperature change of the cooking apparatus 200 is small, and the collected temperature data is not accurate enough for calculation. In the present embodiment, the slope of the trend line is recalculated, and it is understood that the trend line initialization determination unit 15 initializes a calculation variable used for calculating the slope of the trend line.
In this embodiment, the start detection method includes: and under the condition that the intercept change rate of the trend line is greater than a second preset intercept change rate, recalculating the intercept change rate of the 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 of the present embodiment. The controller 10 is configured to recalculate the intercept change rate of the trend line if the intercept change rate of the trend line is greater than a second preset intercept change rate. Wherein the second predetermined intercept change rate is greater than the first predetermined intercept change rate. Thus, the accuracy of calculating the intercept change rate value of the trend line can be improved, and the accuracy of judging whether the cooking apparatus 200 is turned on can be improved.
Specifically, in the present embodiment, the intercept change rate of the trend line is newly calculated, and it can be understood that the trend line initialization determination unit 15 initializes the calculation variables used for calculating the intercept change rate of the trend line.
In this embodiment, the start detection method includes: and under the condition that the time length for calculating the slope change rate of the trend line and the intercept change rate of the trend line is greater than or equal to a second preset time length, recalculating the slope change rate of the trend line and the intercept change rate of the 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 of the present embodiment. The controller 10 is configured to recalculate the slope change rate of the trend line and the intercept change rate of the trend line when the time length for calculating the slope change rate of the trend line and the intercept change rate of the trend line is greater than or equal to a second preset time length.
Specifically, in the present embodiment, the slope change rate of the trend line and the intercept change rate of the trend line are recalculated, and it can be understood that the trend line initialization determination unit 15 initializes and calculates the slope change rate of the trend line and the intercept change rate of the trend line.
In this embodiment, referring to fig. 2, the start control portion 18 may be configured to control the range hood 110 to start when the cooking apparatus 200 is detected to be started.
In summary, to further illustrate the method for detecting the turning-on of the cooking apparatus 200 according to the embodiment of the present invention, an example is described below.
Referring to fig. 14, fig. 14 illustrates a temperature change rate (dT) of the cooking apparatus 200objCurve Q1, temperature (T) over timeobj) Curve Q2 and trend lines Q3 and Q4 over time. Wherein point A is at t0Value of temperature change rate, T, corresponding to timestartFor the initial temperature of the cooking apparatus 200, Q3 is at tcThe trend line at time, Q4, is the trend line at time t.
Referring to FIG. 15, FIG. 15 is a graph of Slope (Slope) of trend line as a function of time Q5 and intercept (Offset) of trend line as a function of timeTime-varying curve Q6. Wherein at tcThe Slope corresponding to the moment is the first Slope of the trend linecheck. The first preset Slope is SlopedetThe second preset Slope is Slopemin. The slope corresponding to time t is the slope (t) of the trend line.
Referring to FIG. 16, FIG. 16 shows the slope rate of change (R) of the trend lineSlope) Time-dependent curve Q7 and Trend line intercept Rate of Change (R)offset) Curve Q8 over time. Wherein at tcBefore the moment, the slope change rate of the trend line is set to be a first preset value Rmax. The intercept change rate of the trend line is set to a second preset value, which is set to zero in fig. 16. The first preset slope change rate is RdetThe second preset slope rate of change value is Rmax. The first predetermined intercept change rate is rdetThe second predetermined intercept change rate is rmax。
In FIGS. 14 to 16, t0The moment is the moment corresponding to the temperature change rate of the cooking apparatus 200 being greater than or equal to the preset temperature change rate, at t0At that time, the algorithm that acquires the trend line, the slope of the trend line, and the time-varying rate of change of the slope of the trend line begins to execute. t is t0Time to tcThe time length of the time lapse is the first preset time length of the present embodiment. t is t0Time to teThe time length of the time lapse is the second preset time length of the present embodiment.
In this embodiment, please refer to fig. 15, when the Slope of the trend line is smaller than SlopeminIn this case, the slope of the trend line is recalculated, that is, the algorithm parameters are initialized and the algorithm is restarted. Referring to fig. 16, the intercept change rate at the trend line is greater than rmaxIn the case of (2), the intercept change rate of the trend line is recalculated, that is, the algorithm parameters are initialized and the algorithm is restarted. Referring to FIGS. 15 to 16, at teAfter the moment, the slope of the trend line, the slope intercept of the trend line, the slope change rate of the trend line and the intercept change rate of the trend line are recalculated, that is, algorithm parameters are initialized and the algorithm is restarted。
In this embodiment, please refer to fig. 15 and 16, at tcAfter the moment, the Slope of the trend line is more than or equal to SlopedetAnd the slope change rate of the trend line is more than or equal to RdetAnd rate of change of intercept of trend line<R.OffsetdetIn case of (2), it is judged that the cooking apparatus 200 is turned on.
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 according to the slope of the trend line, the slope change rate of the trend line, and the intercept change rate of the trend line, so that whether the cooking device 200 is turned on can be accurately identified, misjudgment caused by human body temperature influence is effectively avoided, the time for turning on and determining the cooking device 200 is reduced, the performance of turning on and detecting the cooking device 200 is improved, turning on of the cooking device 200 is more stably determined, and under the condition that turning on of the cooking device 200 is detected, the range hood 110 can be turned on quickly and automatically, and user experience is improved.
Specifically, the range hood 110 includes, but is not limited to, an upper exhaust type range hood, a lower exhaust type range hood, a side-draft type range hood, 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 100 can be applied to other kitchen appliances, such as a rice cooker, a microwave oven, a washing appliance, a refrigerator, etc.
Referring to fig. 17, 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 control method according to any 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 S10, acquiring an actual temperature of the cooking apparatus 200 and an initial temperature of the cooking apparatus 200;
step S30, acquiring a relative temperature between an actual temperature of the cooking apparatus 200 and an initial temperature of the cooking apparatus 200, and generating a temperature change curve according to the relative temperature;
step S50, obtaining the slope of the trend line corresponding to the temperature change curve and the intercept of the trend line;
step S70, obtaining the slope change rate of the trend line according to the slope of the trend line, and obtaining the intercept change rate of the trend line according to the intercept of the trend line;
in step S90, it is determined whether the cooking apparatus 200 is turned on according to the slope of the trend line, the slope change rate of the trend line, and the intercept change rate of the trend line.
In the computer-readable storage medium 300 of the above embodiment, whether the cooking device 200 is turned on is determined according to the slope of the trend line, the slope change rate of the trend line, and the intercept change rate of the trend line, so that whether the cooking device 200 is turned on can be accurately identified, misdetermination due to human body temperature influence is effectively avoided, the time for turning on and determining the cooking device 200 is reduced, the performance of turning on and detecting the cooking device 200 is improved, turning on of the cooking device 200 is more stably determined, and user experience is improved.
Specifically, the processor 400 may be a processor included in a controller of the activation detection apparatus 100. The computer readable storage medium 300 may be installed in the range hood 110, or may be installed in another terminal, and the range hood 110 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, home 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 (control method), 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 actual temperature of the cooking equipment and an initial temperature of the cooking equipment;
acquiring a relative temperature between an actual temperature of the cooking equipment and an initial temperature of the cooking equipment, and generating a temperature change curve according to the relative temperature;
acquiring the slope of a trend line corresponding to the temperature change curve and the intercept of the trend line;
acquiring the slope change rate of the trend line according to the slope of the trend line, and acquiring the intercept change rate of the trend line according to the intercept of the trend line;
and judging whether the cooking equipment is started or not according to the slope of the trend line, the slope change rate of the trend line and the intercept change rate of the trend line.
2. The opening detection method according to claim 1, wherein acquiring the initial temperature of the cooking appliance includes:
calculating a rate of temperature change of the cooking device;
and under the condition that the temperature change rate of the cooking equipment is greater than a preset temperature change rate, taking the current temperature of the cooking equipment as the initial temperature of the cooking equipment.
3. The opening detection method according to claim 2, characterized in that the control method includes:
determining the firepower of the cooking equipment according to the temperature change rate;
and acquiring the preset temperature change rate according to the firepower of the cooking equipment.
4. The opening detection method according to claim 1, wherein the temperature change curve includes a plurality of curve segments, and obtaining a slope of a trend line corresponding to the temperature change curve and an intercept of the trend line comprises:
acquiring the trend line corresponding to each curve segment;
and calculating the slope of the trend line and the intercept of the trend line.
5. The opening detection method according to claim 1, wherein obtaining a slope change rate of the trend line according to the slope of the trend line comprises:
under the condition that the time length for calculating the slope change rate of the trend line is less than or equal to a first preset time length, setting the slope change rate of the trend line as a first preset value;
acquiring a first slope of the trend line corresponding to the ending moment of the first preset duration;
and under the condition that the time length for calculating the slope change rate of the trend line is greater than the first preset time length, the slope change rate of the trend line is the ratio of the current slope of the trend line to the first slope of the trend line.
6. The opening detection method according to claim 1, wherein obtaining the intercept change rate of the trend line according to the intercept of the trend line comprises:
under the condition that the time length for calculating the intercept change rate of the trend line is less than or equal to a first preset time length, setting the intercept change rate of the trend line to be a second preset value;
and under the condition that the time length for calculating the slope change rate of the trend line is greater than the first preset time length, the intercept change rate of the trend line is the ratio of the current intercept of the trend line to the relative temperature.
7. The opening detection method according to claim 1, wherein judging whether the cooking device is opened according to the slope of the trend line, the slope change rate of the trend line and the intercept change rate of the trend line comprises:
and under the conditions that the slope of the trend line is greater than or equal to a first preset slope, the slope change rate of the trend line is greater than or equal to a first preset slope change rate, and the intercept change rate of the trend line is smaller than a first preset intercept change rate, judging that the cooking equipment is started.
8. The opening detection method according to claim 7, characterized in that the opening detection method comprises:
under the condition that the slope of the trend line is smaller than a second preset slope, recalculating the slope of the trend line, wherein the second preset slope is smaller than the first preset slope; or
Under the condition that the intercept change rate of the trend line is larger than a second preset intercept change rate, recalculating the intercept change rate of the trend line, wherein the second preset intercept change rate is larger than the first preset intercept change rate; or
And under the condition that the time length for calculating the slope change rate of the trend line and the intercept change rate of the trend line is greater than or equal to a second preset time length, recalculating the slope change rate of the trend line and the intercept change rate of the trend line.
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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