CN109556146B

CN109556146B - Intelligent judgment method for dry burning of kitchen cookware

Info

Publication number: CN109556146B
Application number: CN201811515372.2A
Authority: CN
Inventors: 刘红斌; 康逸; 熊仕杰
Original assignee: Chengdu Home Saifu Technology Co Ltd
Current assignee: Chengdu Home Saifu Technology Co Ltd
Priority date: 2018-12-11
Filing date: 2018-12-11
Publication date: 2020-02-07
Anticipated expiration: 2038-12-11
Also published as: CN109556146A

Abstract

The invention discloses an intelligent judgment method for dry burning of kitchen cookware, which relates to the field of kitchen safety protection and comprises the following steps: initialChanging the number of timed interrupts tit to 0, acquiring temperature data of N position points on the stove at one time, and storing the acquired temperature data in a temperature data array TDA [ T [ T ] ]_tit][N]Storing the maximum value in the acquired temperature data in the maximum temperature array MTA [ ast ]]Performing the following steps; wherein, T_titAnd ast are respectively preset array length fixed values; after the interval time delta T, the time interruption times tit are made tit +1, the temperature data of N position points on the stove are obtained again, and the temperature data array TDA [ T ] is updated_tit][N]And maximum temperature array MTA [ ast ]](ii) a When tit is more than or equal to T_titTime-1, based on the temperature data array TDA [ T ]_tit][N]Judging whether a person is in front of the stove or not; when tit is more than or equal to ast-1, MTA [ ast ] is determined based on the highest temperature array]Preliminarily judging whether the cookware is dry-burned or not; if the pot is judged to be dry-burning and no person is in front of the pot, the pot is judged to be dry-burning, otherwise, the pot is not dry-burning. The method can identify whether a person stands in front of the cooker, and avoid the false dry-fire alarm caused by the manual operation of the cooker.

Description

Intelligent judgment method for dry burning of kitchen cookware

Technical Field

The invention relates to the field of kitchen safety protection, in particular to an intelligent method for judging dry burning of kitchen cookware.

Background

At present, a method for preventing dry burning of a cookware mainly comprises the step of modifying the cookware, for example, a contact or non-contact sensor is added at the middle position of the cookware, and a temperature measurement module used by the cookware added with the contact sensor is a temperature sensor such as PT 100. However, the touch sensor is required to be installed at the center of the cooker to detect the temperature of the bottom of the cooker, and a part of the touch sensor is required to be protruded to ensure that the touch sensor is in contact with the bottom of the cooker. And the other part replaces the contact sensor with an infrared sensor and is arranged at the bottom of the stove, so that the problem of contact is solved. However, the infrared sensor is still arranged below the right center of the stove, the infrared lens is opposite to the stove, the low temperature of the stove is detected, and then the valve is closed when the temperature value is compared with the dry burning threshold value. The prior art has the following outstanding defects:

1. detect kitchen low temperature through contact temperature sensor, must require pan bottom and temperature sensor fully to contact, must guarantee that the bottom of a boiler is level and smooth, and pan size on the market, bottom of a boiler shape are various, especially some a kind of deep pot hot water type marmite, and the pan bottom is protruding all around, and the bottom center is slightly than low all around, just so leads to the unable temperature sensor that detects the dry combustion method in pan bottom to contact, leads to the function inefficacy that burns futilely.

2. The pan can be along with the increase of live time in the use bottom, and some impurity have more when the bottom can be than newly purchasing, become the unevenness, and the heat conductivity is also not as before for pan bottom and temperature sensor contact are also not abundant, influence dry combustion method and judge. Even if the infrared sensor is used on a stove without open fire, the infrared sensor is opposite to the stove, and the stove is very easy to pollute by impurities such as oil stains and the like in the cooking process, so that the infrared sensor is very easy to be polluted, and the infrared sensor is quickly out of work.

3. An infrared sensor is added in the center of the cooker, the temperature of the pot bottom is detected through infrared rays, however, in the actual cooking process, almost all flames cover the periphery of the pot bottom, so that most of the temperature obtained by the infrared temperature sensor is actually the temperature of the flames, but not the temperature of a pot, and the practicability is not high.

4. The above contact or non-contact solutions are modified based on the existing gas stove, and the user must buy the gas stove again if the user wants to solve the dry burning problem, which undoubtedly greatly affects the popularization disadvantage of the dry burning prevention solution.

5. In the prior art, whether a person is in front of the cooker or not can not be detected, so that whether the temperature change of the cooker is artificial or the cooker is dried, and the condition of frequently giving a false alarm during normal cooking can not be distinguished.

6. When a user uses the cooker to cook dishes, soup or perform other cooking actions, the user may have to leave the kitchen temporarily due to various sudden situations, such as guests, receiving a call, receiving an express and the like, and the user forgets to turn off the fire due to hurried leaving or leaving the kitchen for too long time, so that the cooker is dried. More seriously, the pot may be burnt, and carbide in the pot may be ignited by contact with fire, thereby causing fire.

Therefore, the method for accurately judging whether the gas stove is dry-burned or not without replacing the gas stove by a user is particularly significant.

Disclosure of Invention

The invention aims to: the intelligent kitchen pot dry-burning judging method is provided for solving the problem that when the abnormal temperature change on a kitchen range is detected, whether a person stands in front of the kitchen range is not judged, and therefore the dry-burning is misreported.

The technical scheme adopted by the invention is as follows:

an intelligent judgment method for dry burning of kitchen cookware comprises the following steps:

the initialization timer interruption times tit is equal to 0, temperature data of N position points on the stove at one time is obtained, and the obtained temperature data is stored in a temperature data array TDA [ T [ T ] ]_tit][N]Storing the maximum value in the acquired temperature data in the maximum temperature array MTA [ ast ]]Performing the following steps; wherein, T_titAnd ast are respectively preset array length fixed values;

after the interval time delta T, the time interruption times tit are made tit +1, the temperature data of N position points on the stove are obtained again, and the temperature data array TDA [ T ] is updated_tit][N]And maximum temperature array MTA [ ast ]]；

Obtaining and updating temperature data array TDA [ T ]_tit][N]And maximum temperature array MTA [ ast ]]；

When tit is more than or equal to T_titTime-1, based on the temperature data array TDA [ T ]_tit][N]Judging whether a person is in front of the stove or not;

when tit is not less than ast-1, preliminarily judging whether the cookware is dry-burned or not based on the MTA (maximum temperature array) ast;

if the pot is judged to be dry-burning and no person is in front of the pot, the pot is judged to be dry-burning, otherwise, the pot is not dry-burning.

Further, the obtaining and updating of the temperature data array TDA [ T ]_tit][N]And maximum temperature array MTA [ ast ]]The method comprises the following specific steps:

step 1.1, the number of initialization timer interrupts tit is 0, the first type judgment parameter jpA is 0, the second type judgment parameter jpB is 0, and the temperature data array TDA [ T [ T ] ]_tit][N]Highest temperature array MTA [ ast ]](ii) a It is composed ofIn, T_tit≤ast；

Step 1.2, acquiring temperature data of N position points on the stove at one time at intervals of delta T, and storing the acquired N temperature data into a temperature data array TDA [ T ]_tit][N]jpA% T_titIn the row; jpA% T_titRepresentation jpA divided by T_titThen obtaining a remainder;

step 1.3, current temperature data array TDA [ T ]_tit][N]jpA% T_titMaximum value in row as maximum temperature array MTA [ ast ]]The value of the element with the middle subscript of jpB;

step 1.4:

step 1.4.1. make tit ═ tit +1, jpA ═ jpA +1, jpB ═ jpB +1, and if jpA ═ T_titIf jpA is equal to 0; if jpB is ast, jpB is 0;

and 1.4.2, returning to the step 1.2.

Further, the temperature data-based array TDA [ T ]_tit][N]The specific steps for judging whether a person exists in front of the cooker are as follows:

a1, initializing an element variable i to be 0;

step A2, judging a temperature data array TDA [ T ]_tit][N]Middle element TDA [0]][i]And TDA [1]][i]Whether the difference value between the two is greater than a preset temperature difference threshold value T_tdAnd judging the element TDA [0]][i]And/or TDA [1]][i]Whether or not less than a preset low temperature threshold T_ltIf the above conditions are satisfied, go to step a 3; if the conditions cannot be simultaneously met, judging that no person is in front of the stove;

step A3. judge TDA [1]][i]And TDA [2]][i]Whether the difference value between the two is less than a preset effective threshold value T_vIf yes, judging that people exist in front of the stove; if not, go to step A4;

and step A4, enabling i to be i +1, judging whether the value of the element variable i is smaller than N, if so, returning to the step A2, and if not, judging that no person is in front of the stove.

Further, the specific steps of preliminarily judging whether the cookware is dry-burned or not based on the maximum temperature array MTA [ ast ] are as follows:

step B1.1, initializing a subscript variable i ═ ast and a comparison time ═ 0;

step B1.2. calculating adjacent difference A_m＝MTA[j]-MTA[j-1]Judging the adjacent difference value A_mWhether or not it is greater than a preset temperature rise threshold T_trIf yes, preliminarily judging that the pot is dry-burned; if not, entering the step B1.3;

step b1.3, let j equal to j-1, time equal to time +1, determine whether the index variable j is less than 1 or the comparison time is greater than the preset comparison threshold T_cnIf yes, according to preset comparison threshold T_ctThen preliminarily judging whether the cookware is dry-burned or not; if not, returning to the step B1.2; wherein, the comparison time threshold T_cnD represents a predetermined time difference.

Further, in step B1.3, the comparison threshold T is set in advance_ctThe specific steps of preliminarily judging whether the cookware is dried to be burnt are as follows:

step b1.3.1. let subscript variable j equal to ast, comparison time equal to 0, accumulate difference C _m0, current neighbor difference B_m＝MTA[j]-MTA[j-1]；

Step B1.3.2. judging current adjacent difference value B_mWhether it is greater than a comparison threshold T_ctIf yes, make the accumulated difference C_m＝C_m+B_mGo to step B1.3.3; if not, go to step B1.3.3;

step B1.3.3. judging the accumulated difference value C_mWhether or not it is greater than the temperature rise threshold T_trIf yes, preliminarily judging that the pot is dry-burned; if not, go to step B1.3.4;

step b1.3.4. let j ═ j-1, times ═ times +1, judge whether subscript variable j is less than 1 or the comparison time is greater than the comparison threshold T_cnIf yes, preliminarily judging that the pot is not dried; if not, return to step B1.3.2.

Further, in step 1.4, when the number of timed interrupts tit increases until it is greater than ast, let tit be equal to ast, that is, step 1.4 is:

step 1.4.1. to make tit-tit +1, jpA-jpA +1, jpB-jpB +1, or tit>ast, let tit be ast; if jpA ═ T_titThen give an orderjpA ═ 0; if jpB is ast, jpB is 0;

and 1.4.2, returning to the step 1.2.

Further, when tit ≧ T_titAt-1, based on the temperature data array TDA [ T_tit][N]Judging whether a person is in front of the stove or not, firstly judging the MTA (last) array of the highest temperature]Is greater than a preset high temperature threshold value T_htIf yes, based on TDA [ T ] array based on temperature data_tit][N]And judging whether a person exists in front of the stove or not, and if not, not judging whether the person exists in front of the stove or not.

Further, the temperature data array TDA [ T ]_tit][N]Number of lines T_titIs 3, the highest temperature array MTA [ ast ]]Has a length ast of 10.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. the invention can identify whether a person stands in front of the cooker or not so as to distinguish different situations, and preliminarily judges the dry-burning state of the cooker only when the person really leaves the cooker, thereby completely avoiding the situation of false dry-burning caused by abnormal temperature change caused by manual operation of the cooker.

2. According to the invention, the infrared array sensor is arranged at a position far away from the stove, so that the damage of the equipment caused by high temperature and pollution of the gas stove in use is avoided. The existing gas stove does not need to be replaced by a user, the shape of the bottom of a pot used on the gas stove does not have any requirement, the user can select any cooker to cook, and the situation that equipment is polluted due to cooking to cause failure can be avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is an overall flow chart of the present invention;

FIG. 2 is a flow chart of the present invention for determining whether a person is in front of the range;

fig. 3 is a flowchart of the primary determination of whether the pot is dry-cooking or not according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.

Wherein the time delta T takes the value of 1s-5 s.

Obtaining and updating temperature data array TDA [ T ]_tit][N]And maximum temperature array MTA [ ast ]]The method comprises the following specific steps:

step 1.1, the number of initialization timer interrupts tit is 0, the first type judgment parameter jpA is 0, the second type judgment parameter jpB is 0, and the temperature data array TDA [ T [ T ] ]_tit][N]Highest temperature array MTA [ ast ]](ii) a Wherein, T_tit≤ast；

step 1.4:

step 1.4.1. to make tit-tit +1, jpA-jpA +1, jpB-jpB +1, or tit>ast, let tit be ast; if jpA ═ T_titIf jpA is equal to 0; if jpB is ast, jpB is 0;

and 1.4.2, returning to the step 1.2.

TDA [ T ] array based on temperature data_tit][N]The specific steps for judging whether a person exists in front of the cooker are as follows:

a1, initializing an element variable i to be 0;

The specific steps of preliminarily judging whether the cookware is dry-burned or not based on the maximum temperature array MTA [ ast ] are as follows:

step B1.1, initializing a subscript variable j ═ ast and a comparison time ═ 0;

step B1.2. let adjacent difference A_m＝MTA[j]-MTA[j-1]Judging the adjacent difference value A_mWhether or not it is greater than a preset temperature rise threshold T_trIf yes, preliminarily judging that the pot is dry-burned; if not, entering the step B1.3;

step b1.3, let j equal to j-1, time equal to time +1, determine whether the index variable j is less than 1 or the comparison time is greater than the preset comparison threshold T_cnIf yes, according to preset comparison threshold T_ctThen preliminarily judging whether the cookware is dry-burned or not; if not, returning to the step B1.2; wherein, the comparison time threshold T_cnD represents a predetermined time difference, and the value of the time difference is 10s to 50 s.

The features and properties of the present invention are described in further detail below with reference to examples.

Example 1

The method for intelligently judging the dry-burning of the kitchen cookware provided by the preferred embodiment of the invention comprises the following steps:

after the timer is initialized and the interruption times tit is 0, and the interval time is 5s, the infrared array sensor acquires the temperature data of 64 position points on the stove at one time, the acquired temperature data is stored in a temperature data array TDA [3] [64], and the maximum value in the acquired temperature data is stored in a maximum temperature array MTA [10 ]. The timer interrupt times tit represent the times of timer interrupt after the data processing program is started, the temperature data array TDA is a two-dimensional array with 3 rows and 64 columns, and the highest temperature array MTA [10] is a one-dimensional array with the length of 10. In this embodiment, the model of the infrared array sensor is MLX90621, and the model of the data processing chip is STM32F030 CC. The infrared array sensor is installed above a kitchen ceiling, and the kitchen gas cooker is contained in the measuring range of the infrared array sensor.

After the interval time of 5s, the time interruption times tit are made tit +1, the temperature data of 64 position points on the stove are obtained again, and the temperature data array TDA [3] [64] and the highest temperature array MTA [10] are updated;

when tit is more than or equal to 2, judging whether a person is in front of the stove or not based on the temperature data array TDA 3 64;

when tit is more than or equal to 9, primarily judging whether the pot is dry-burning or not based on the highest temperature array MTA 10;

The specific steps for storing the acquired temperature data in the temperature data array TDA [3] [64] and the highest temperature array MTA [10] are as follows:

step 1.1, the number of initialization timer interrupts tit is 0, the first type judgment parameter jpA is 0, the second type judgment parameter jpB is 0, the temperature data array TDA [3] [64], and the maximum temperature array MTA [10 ].

Step 1.2, acquiring temperature data of 64 position points on the stove once every 5s, and storing the acquired 64 temperature data into jpA% 3 th row of a temperature data array TDA [3] [64 ].

Step 1.3, taking the maximum value in jpA% 3 th row of the current temperature data array TDA [3] [64] as the value of the element with the subscript of jpB in the highest temperature array MTA [10 ].

Step 1.4:

step 1.4: 1. tit, tit +1, jpA, jpA +1, jpB, jpB +1, and if tit is greater than 10, tit, 10; if jpA is equal to 3, jpA is equal to 0; if jpB is 10, jpB is 0;

and 1.4.2, returning to the step 1.2.

The specific steps of judging whether a person exists in front of the stove or not based on the temperature data array TDA [3] [64] are as follows:

step a1. initializing element variable i to 0.

Step A2, judging whether the difference value between elements TDA [0] [ i ] and TDA [1] [ i ] in the temperature data array TDA [3] [64] is larger than 5 ℃, judging whether the elements TDA [0] [ i ] and/or TDA [1] [ i ] are smaller than 38 ℃, and if the conditions are met at the same time, entering step A3; if the conditions cannot be simultaneously met, the cooking range is judged to be unmanned.

Step A3, judging whether the difference value between the TDA [1] [ i ] and the TDA [2] [ i ] is less than 0.5 ℃, if so, judging that a person is in front of the stove; if not, go to step A4. TDA 0, TDA 1 and TDA 2 refer to the temperature values of the same position point obtained by the last three times of timer interruption respectively.

And step A4, making i equal to i +1, judging whether the value of the element variable i is less than 64, if so, returning to the step A2, and if not, judging that no person is in front of the stove.

The specific principle of judging whether a person is in front of the stove is as follows: when the temperature detected by the infrared matrix sensor changes, the temperature does not continuously increase or decrease, but suddenly decreases to a temperature lower than the low-temperature threshold value of 38 ℃ firstly, and then the temperature is kept unchanged, namely, the temperature indicates that a person keeps in front of the stove. The common temperature rise or temperature fall is a continuous process, and different from the temperature change state of a person before the cooker, the temperature change state is judged whether the person before the cooker or the normal temperature change in the pot is caused by the characteristics that one is continuously changed and the other is basically unchanged after mutation. The 38 ℃ is mainly the temperature of human body, if people stand in front of the stove and shield certain position points on the stove, the temperature of at least one position point is changed from the original high temperature value to a value lower than 38 ℃. The data monitored by 64 position points are judged one by one, and the method can also effectively identify the people even if the people stand at different positions in front of the stove as long as the temperature data of one position point accords with the characteristic that the people stand in front of the stove. To reduce processor load and increase efficiency, the maximum temperature array MTA [10]]Maximum value of (1) MTA_maxWhen the temperature is less than or equal to 50 ℃, the temperature is regarded as safe, and whether a person is in front of the cooker is not judged, namely the cooker is judged not to be dry-burnt.

The concrete steps of preliminarily judging whether the cookware is dry-burned or not based on the maximum temperature array MTA [10] are as follows:

step b1.1. initialize index variable j ═ 10 and compare times ═ 0.

Step B1.2. let adjacent difference A_m＝MTA[j]-MTA[j-1]Judging the adjacent difference value A_mIf the temperature is higher than 20 ℃, preliminarily judging that the pot is dry-fired; if not, go to step B1.3.

Step b1.3, let j equal to j-1, time equal to time +1, determine whether index variable j is less than 1 or comparison time is greater than 10, if yes, go to step B3.1.1; if not, returning to the step B1.2.

Step b3.1.1. initialize index variable j equal to 10, compare times equal to 0, accumulate difference C _m0, current neighbor difference B_m＝MTA[j]-MTA[j-1]。

Step B3.1.2. judging the current adjacent difference value B_mIf it is greater than 0 deg.C, making the accumulated difference value C_m＝C_m+B_mGo to step B3.1.3; if not, go to step B3.1.3.

Step B3.1.3. judging the accumulated difference value C_mIf the temperature is higher than 20 ℃, preliminarily judging that the pot is dry-fired; if not, go to step B3.1.4.

Step B3.1.4, making j equal to j-1, time equal to time +1, judging whether the subscript variable j is less than 1 or the comparison time is more than 10, if so, preliminarily judging that the pot is not dry-burned; if not, return to step B3.1.2.

The concrete principle of primarily judging whether the cookware is dry-burned or not based on the maximum temperature array MTA [10] is as follows: when food in the pan is not dried, the food can be kept in a certain temperature range in the pan in a steam volatilization mode, and only when water in the pan is dried, the temperature in the pan can not be kept constant through steam volatilization, so that the temperature of the pan can be rapidly increased. The temperature of the kitchen range is obtained every 5s by the infrared matrix sensor, and the maximum value is found and stored in the maximum temperature array MTA [10 ]. When no person is in front of the cooker, if the temperature rises within any 5s or within continuous (5s) × n periods (n is an integer which is more than or equal to 1 and less than or equal to 10), and the sum of the rising temperatures is more than 20 ℃, the dry burning of the cooker is preliminarily determined.

When someone is in front of the cooker, the temperature change obtained by the infrared matrix sensor is large, normal cooking is considered, and whether the cooker is dry-burned or not does not need to be preliminarily judged. After the people leaves the kitchen, the pan is still cooking, whether dry combustion method to the pan carries out preliminary judgement according to the data that detect again. When the cookware is judged to be dry-burned and no person is in front of the cookware in the initial step, the cookware is judged to be dry-burned, otherwise, the cookware is not dry-burned.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an intelligence judges kitchen pan dry combustion method which characterized in that includes:

if tentatively judge for the pan dry combustion method and the cooking utensils before unmanned, then judge the pan dry combustion method, otherwise for the pan not dry combustion method, wherein:

step 1.1, initializing the timer interrupt frequency tit to 0, the first type judgment parameter jpA to 0, and the second type judgment parameter jpB ═ 0, temperature data array TDA [ T ]_tit][N]Highest temperature array MTA [ ast ]](ii) a Wherein, T_tit≤ast；

step 1.4:

step 1.4.2, returning to step 1.2;

a1, initializing an element variable i to be 0;

step A4, making i equal to i +1, judging whether the value of the element variable i is smaller than N, if so, returning to the step A2, and if not, judging that no person is in front of the stove;

step b1.3, let j equal to j-1, time equal to time +1, determine whether the index variable j is less than 1 or the comparison time is greater than the preset comparison threshold T_cnIf yes, according to preset comparison threshold T_ctThen preliminarily judging whether the cookware is dry-burned or not; if not, returning to the step B1.2; wherein, the comparison time threshold T_cnD% Δ T, D representing a predetermined time difference; according to a preset comparison threshold value T_ctThe specific steps of preliminarily judging whether the cookware is dried to be burnt are as follows:

step b1.3.1. let subscript variable j equal to ast, comparison time equal to 0, accumulate difference C_m0, current neighbor difference B_m＝MTA[j]-MTA[j-1]；

2. The method for intelligently judging the dry-cooking of the cookware in the kitchen according to claim 1, wherein in step 1.4, when the number of the timed interruption tit increases until the number of the timed interruption exceeds ast, tit ═ ast is set, that is, step 1.4 is:

step 1.4.1. make tit ═ tit +1, jpA ═ jpA +1, jpB ═ jpB +1, if tit>ast, let tit be ast; if jpA ═ T_titIf jpA is equal to 0; if jpB is ast, jpB is 0;

and 1.4.2, returning to the step 1.2.

3. The method for intelligently judging the dry-cooking of the cookware in the kitchen as claimed in claim 1, wherein when tit is not less than T_titAt-1, based on the temperature data array TDA [ T_tit][N]Judging whether a person is in front of the stove or not, firstly judging the MTA (last) array of the highest temperature]Is greater than a preset high temperature threshold value T_htIf yes, based on TDA [ T ] array based on temperature data_tit][N]And judging whether a person exists in front of the stove or not, and if not, not judging whether the person exists in front of the stove or not.

4. The method for intelligently judging the dry-cooking of cookware in a kitchen as claimed in claim 1, wherein the temperature data array TDA [ T ] is_tit][N]Number of lines T_titIs 3, the highest temperature array MTA [ ast ]]Has a length ast of 10.