CN110017909B - Cooking appliance control method and cooking appliance - Google Patents

Cooking appliance control method and cooking appliance Download PDF

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CN110017909B
CN110017909B CN201810022834.0A CN201810022834A CN110017909B CN 110017909 B CN110017909 B CN 110017909B CN 201810022834 A CN201810022834 A CN 201810022834A CN 110017909 B CN110017909 B CN 110017909B
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temperature
value
sampling
temperature sensing
difference
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CN110017909A (en
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李娟�
李小辉
汪钊
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Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
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Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G01K3/02—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values
    • G01K3/04—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values in respect of time
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G01K3/02—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values
    • G01K3/06—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values in respect of space
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
    • G01K3/14—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of space
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1917—Control of temperature characterised by the use of electric means using digital means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K2207/00—Application of thermometers in household appliances
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K2219/00—Thermometers with dedicated analog to digital converters

Abstract

The invention discloses a cooking utensil control method and a cooking utensil, wherein the cooking utensil comprises at least two temperature sensing devices arranged in the same isothermal zone; the cooking appliance control method includes the steps of: synchronously acquiring temperature sampling signals measured by the temperature sensing devices in the same isothermal zone; acquiring the spatial discrete degree of the temperature sampling signal in the isothermal zone; and acquiring a temperature detection value of the cooking appliance according to the space discrete degree and the temperature sampling signal. According to the technical scheme, the accuracy of temperature detection of the cooking utensil is improved.

Description

Cooking appliance control method and cooking appliance
Technical Field
The invention relates to the technical field of temperature control, in particular to a cooking appliance control method and a cooking appliance.
Background
The temperature control technology is a very critical technology in the cooking utensil, in order to improve the accuracy of temperature control in the cooking utensil, at first need carry out accurate detection to the temperature of cooking utensil, and is specific, can be through setting up the mode of a plurality of temperature sensing devices to realize the multiple spot temperature measurement, increase the collection scope of temperature, realize the comprehensive control to the cooking utensil temperature. However, due to factors such as unstable performance of the temperature sensing device or deviation of the placement position of the cookware during the cooking process, the temperature collected at different positions has a difference, which affects the accuracy of the temperature detection of the cooking utensil.
Disclosure of Invention
The invention mainly aims to provide a cooking appliance control method, which aims to solve the technical problem of difference of multipoint temperature measurement and improve the accuracy of temperature detection of the cooking appliance.
In order to achieve the purpose, the invention provides a cooking utensil control method, wherein the cooking utensil comprises at least two temperature sensing devices arranged in the same isothermal zone;
the cooking appliance control method includes the steps of:
synchronously acquiring temperature sampling signals measured by the temperature sensing devices in the same isothermal zone;
acquiring the spatial discrete degree of the temperature sampling signal in the isothermal zone;
and acquiring a temperature detection value of the cooking appliance according to the space discrete degree and the temperature sampling signal.
Preferably, before the step of synchronously acquiring the temperature sampling signals measured by the temperature sensing devices in the same isothermal zone, the cooking utensil control method further includes the steps of:
acquiring the position of each temperature sensing device;
and dividing the temperature sensing device into corresponding isothermal zones according to the position of the temperature sensing device.
Preferably, the step of acquiring the degree of spatial dispersion of the temperature sampling signal in the isothermal zone comprises:
acquiring temperature sampling values of the temperature sampling signals in the isothermal zone at the same sampling time;
calculating the arithmetic mean value of all the temperature sampling values, and recording as a first space mean value;
and calculating the spatial discrete degree of the temperature sampling signals in the isothermal zone according to the absolute value of the difference between the temperature sampling values and the first spatial average value.
Preferably, the step of acquiring the temperature detection value of the cooking appliance according to the spatial dispersion degree and the temperature sampling signal comprises:
comparing the absolute value of the difference between the temperature sampling values and the first space average value at the same sampling time with a first preset difference value according to a preset sampling interval;
accumulating a first sampling number once when the absolute value of the difference between each temperature sampling value and the first spatial average value is less than or equal to a first preset difference value at the same sampling time;
comparing the first sampling number and a first preset number which are continuously accumulated;
when the continuously accumulated first sampling number is larger than or equal to a first preset number, acquiring temperature sampling signals measured by each temperature sensing device in the isothermal zone;
acquiring temperature sampling values of the temperature sampling signals in the isothermal zone at the detection time;
and calculating the arithmetic mean value of all the temperature sampling values in the isothermal zone at the detection time, and recording the arithmetic mean value as the temperature detection value of the cooking utensil.
Preferably, the step of acquiring the temperature sampling value of each temperature sampling signal in the isothermal zone at the detection time includes:
acquiring the time change rate of each temperature sampling signal in the isothermal zone within a sampling period;
calculating the arithmetic mean value of the time change rates of all the temperature sampling signals in the isothermal zone, and recording the arithmetic mean value as a second space mean value;
comparing the absolute value of the difference between the time change rate of each temperature sampling signal and the second spatial average value with a second preset difference value;
and when the absolute value of the difference between the time change rate of all the temperature sampling signals and the second spatial average value is less than or equal to a second preset difference value, acquiring the temperature sampling value of each temperature sampling signal in the isothermal zone at the detection moment.
Preferably, after the step of comparing the time change rate of each of the temperature sampling signals with the absolute value of the difference between the second spatial average and a second preset difference, the method further comprises the following steps:
when the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is larger than a second preset difference value, judging whether the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is smaller than or equal to a third preset difference value;
if so, correcting the temperature sampling signal according to a first preset correction coefficient;
acquiring a temperature detection value of the cooking utensil according to a temperature sampling signal of a first normal temperature sensing device and a corrected temperature sampling signal of a first abnormal temperature sensing device in the isothermal zone;
if not, generating and outputting a first prompt signal to prompt that the temperature sensing device is abnormal;
wherein the third preset difference is greater than the second preset difference; when the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is less than or equal to a second preset difference value, recording the corresponding temperature sensing device as a first normal temperature sensing device; and when the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is greater than a second preset difference value, recording the corresponding temperature sensing device as a first abnormal temperature sensing device.
Preferably, the step of acquiring the temperature detection value of the cooking appliance according to the spatial dispersion degree and the temperature sampling signal comprises:
comparing the absolute value of the difference between the temperature sampling values and the first space average value at the same sampling time with a first preset difference value according to a preset sampling interval;
when the absolute value of the difference between the temperature sampling value and the first space average value is larger than a first preset difference value at the same sampling moment, clearing a first sampling number;
acquiring the number of second abnormal temperature sensing devices in the isothermal zone at the same sampling time, and recording the number as the abnormal number;
comparing the abnormal number with a second preset number;
when the abnormal number is smaller than the second preset number, correcting the temperature sampling signal of the second abnormal temperature sensing device according to a second preset correction coefficient;
acquiring a temperature detection value of the cooking utensil according to a temperature sampling signal of a second normal temperature sensing device and a corrected temperature sampling signal of a second abnormal temperature sensing device in the isothermal zone;
when the absolute value of the difference between the temperature sampling value and the first space average value is less than or equal to a first preset difference value, the corresponding temperature sensing device is marked as a second normal temperature sensing device; and when the absolute value of the difference between the temperature sampling value and the first space average value is greater than a first preset difference value, recording the corresponding temperature sensing device as a second abnormal temperature sensing device.
Preferably, the step of correcting the temperature sampling signal of the second abnormal temperature sensing device according to a second preset correction coefficient includes:
accumulating the second number of samples;
comparing the second sampling number with a third preset number;
when the second sampling number is greater than or equal to a third preset number, calculating an arithmetic average value of the measured temperature sampling signals of each temperature sensing device in the sampling time length corresponding to the second sampling number and regarding the second sampling number, and recording the arithmetic average value as a first time average value;
calculating the arithmetic mean value of the first time mean values of all the second normal temperature sensing devices in the isothermal zone, and recording the arithmetic mean value as a third space mean value;
comparing the absolute value of the difference between the first time average value and the third space average value of each second abnormal temperature sensing device with a fourth preset difference value;
and when the absolute value of the difference between the first time average value and the third space average value is less than or equal to a fourth preset difference value, correcting the temperature sampling signal of the second abnormal temperature sensing device according to a second preset correction coefficient.
Preferably, after the step of comparing the absolute value of the difference obtained by subtracting the third spatial average value from the first time average value of each second abnormal temperature sensing device with a fourth preset difference value, the method further includes the following steps:
and when the absolute value of the difference between the first time average value and the third space average value is greater than a fourth preset difference value, generating and outputting a second prompt signal to prompt that the position of a pot on the cooking utensil is abnormal.
Preferably, after the step of comparing the number of anomalies with a second preset number, the method further comprises the following steps:
when the abnormal number is greater than or equal to the second preset number, accumulating the sampling duration of which the abnormal number is greater than or equal to the second preset number;
comparing the sampling duration and the preset duration which are continuously accumulated;
when the sampling duration that accumulates in succession is greater than or equal to and predetermines the duration, control cooking utensil stop heating generates and output third cue signal to the suggestion is located there is unusually cooking utensil last pan position.
The invention also provides a cooking appliance, which comprises at least two temperature sensing devices arranged in the same isothermal zone, a memory, a processor and a cooking control program which is stored on the memory and can be operated on the processor, wherein the cooking control program realizes the steps of a cooking appliance control method when being executed by the processor, and the cooking appliance control method comprises the following steps: synchronously acquiring temperature sampling signals measured by the temperature sensing devices in the same isothermal zone; acquiring the spatial discrete degree of the temperature sampling signal in the isothermal zone; and acquiring a temperature detection value of the cooking appliance according to the space discrete degree and the temperature sampling signal.
In the technical scheme of the invention, the cooking utensil comprises at least two temperature sensing devices arranged in the same isothermal zone; the cooking appliance control method includes the steps of: synchronously acquiring temperature sampling signals measured by all temperature sensing devices 10 in the same isothermal zone; acquiring the spatial dispersion degree of a temperature sampling signal in the isothermal zone; and acquiring a temperature detection value of the cooking appliance according to the space discrete degree and the temperature sampling signal. The temperature sampling signals measured by a plurality of temperature sensing devices in the same isothermal zone are obtained, so that the overall detection of the temperature of each zone of the cooking utensil is realized, the temperature detection value of the cooking utensil is calculated by combining the temperature sampling signals according to the spatial dispersion degree of the temperature sampling signals, the interference of individual abnormal temperature sensing devices on the temperature detection value is eliminated, or the deviation of the temperature detection value caused by the inaccurate position of a cooker is eliminated, and the accuracy of the temperature detection is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural view of a cooking appliance in a first embodiment of a method for controlling a cooking appliance according to the present invention;
fig. 2 is a schematic flow chart of a first embodiment of a cooking appliance control method according to the present invention;
fig. 3 is a schematic flow chart of a cooking appliance control method according to a second embodiment of the present invention;
fig. 4 is a schematic structural view of a cooking appliance in a second embodiment of a method for controlling a cooking appliance according to the present invention;
fig. 5 is a detailed flowchart of step S200 in the third embodiment of the cooking appliance control method according to the present invention;
fig. 6 is a detailed flowchart of step S300 in the fourth embodiment of the cooking appliance control method according to the present invention;
fig. 7 is a detailed flowchart of step S342 in the fifth embodiment of the cooking appliance control method according to the present invention;
fig. 8 is a detailed flowchart of step S342 in a sixth embodiment of the cooking appliance control method according to the present invention;
fig. 9 is a detailed flowchart of step S300 in the seventh embodiment of the cooking appliance control method according to the present invention;
fig. 10 is a detailed flowchart of step S373 in the eighth embodiment of the cooking appliance control method according to the present invention;
fig. 11 is a detailed flowchart of step S373 in the ninth embodiment of the cooking appliance control method according to the present invention;
fig. 12 is a detailed flowchart of step S300 in the tenth embodiment of the cooking appliance control method according to the present invention;
fig. 13 is a schematic structural diagram of a cooking appliance according to an embodiment of the invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a cooking utensil control method, which is used for obtaining temperature detection values of a cooking utensil by obtaining temperature sampling signals measured by a plurality of temperature sensing devices in an isothermal zone and analyzing the spatial dispersion degree of the temperature sampling signals so as to improve the accuracy of temperature measurement.
In the first embodiment of the present invention, as shown in fig. 1, the cooking appliance includes at least two temperature sensing devices 10 provided in the same isothermal zone.
Specifically, in the cooking appliance, the distribution state of the isothermal zone is related to the distribution state of the heat source, and taking an electromagnetic cooking appliance which uses a circular coil panel to realize heating as an example, the heating area is concentrated in the area where the magnetic induction lines of the coil panel directly radiate, and is usually located right above the coil panel. In addition, under the ideal condition that the pot position is over against the coil panel, the temperatures of all points in the same annular area taking the center of the coil panel as the center of the ring are basically consistent, at least two temperature sensing devices 10 are arranged in the same annular area to monitor the temperature condition of the cooking utensil comprehensively, and in fig. 1, six temperature sensing devices 10 are arranged in the same annular area to realize the multipoint temperature measurement.
As shown in fig. 2, the cooking appliance control method includes the steps of:
s100, synchronously acquiring temperature sampling signals measured by temperature sensing devices in the same isothermal zone;
the temperature sampling signal is a signal of the temperature measured by the temperature sensing device 10 changing with time. By synchronously acquiring the sampling signals of all the temperatures, the sampling values of all the temperatures acquired in the same isothermal zone at the same moment can be compared conveniently in the subsequent processing process. The temperature sensing device 10 may be a resistive temperature sensing device, an inductive temperature sensing device or a capacitive temperature sensing device, and the temperature variation causes the electrical properties of the temperature sensing device 10, such as resistance, inductance or capacitance, to vary, and further causes the voltage or current signal to vary, thereby detecting the temperature sampling signal. Further, the electrical signal may be amplified, filtered, etc. to improve the signal quality, and the analog electrical signal may be converted into a digital electrical signal to perform the subsequent processing steps.
S200, acquiring the spatial discrete degree of a temperature sampling signal in an isothermal zone;
here, the spatial dispersion degree represents a difference between the temperature sampling signals measured by the respective temperature sensing devices 10, that is, a spatial distribution of the temperature sampling signals. For convenience of calculation, the temperature sensing devices 10 may be characterized according to the range, the average difference or the standard deviation of the temperature sampling values measured at the same time. The range difference is also called a full range, and is a distance difference between a maximum value and a minimum value in temperature sampling values measured by the temperature sensing devices 10. The average difference is an arithmetic average of the absolute values of deviations of the temperature sampling values and the arithmetic average value measured by the respective temperature sensing devices 10. The standard deviation is the square root of the arithmetic mean of the squared deviations of the temperature samples from their arithmetic mean.
And step S300, acquiring a temperature detection value of the cooking appliance according to the space discrete degree and the temperature sampling signal.
According to the difference of the spatial discrete degree, whether the temperature sensing device of the cooking utensil is normal or not or whether the pot placing position is normal or not can be deduced. If a part of temperature sensing devices in the temperature sensing area have faults, the temperature sampling signals measured by the temperature sensing devices and the temperature sampling signals measured by other temperature sensing devices have larger difference. In addition, the pot placing position may also affect the result of temperature measurement, taking an electromagnetic cooking appliance as an example, because the temperature measured by the temperature sensing device is actually the high temperature generated by the pot forming eddy current under the electromagnetic induction action of the coil disc, and the high temperature is detected when being transmitted to the temperature sensing device, if the pot placing position deviates, the distance between part of the temperature sensing device in the isothermal zone and the pot is far, a lower temperature sampling value is detected, and the spatial dispersion degree of the temperature sampling signal is large; if the cookware is placed accurately, the discrete degree of the temperature sampling signals measured by the temperature sensing devices in the isothermal zone is correspondingly smaller. When the spatial dispersion degree of the temperature sampling signals is small, the fact that the cooking utensil is in a normal operation state can be inferred, the temperature sampling values of the cooking utensil are obtained according to the temperature sampling signals, the temperature detection range is enlarged, the accuracy of temperature detection is improved, and the interference of jumping of a single temperature sensing device on temperature measurement is avoided. When the spatial dispersion degree of the temperature sampling signal is large, the temperature sampling value measured by the temperature sensing device with large deviation can be selected to be corrected or directly discarded, and the temperature sampling value of the cooking utensil is obtained according to the corrected or reserved temperature sampling signal and the temperature sampling signal measured by the normal temperature sensing device, so that the interference of the temperature sampling signal with large deviation on the final detection result is eliminated, the accuracy of temperature detection is improved, and the details are further explained in the following.
In the present embodiment, the cooking appliance includes at least two temperature sensing devices 10 provided in the same isothermal zone; the cooking appliance control method includes the steps of: synchronously acquiring temperature sampling signals measured by all temperature sensing devices 10 in the same isothermal zone; acquiring the spatial dispersion degree of a temperature sampling signal in the isothermal zone; and acquiring a temperature detection value of the cooking appliance according to the space discrete degree and the temperature sampling signal. The temperature sampling signals measured by a plurality of temperature sensing devices 10 in the same isothermal zone are obtained, so that the overall detection of the temperature of each zone of the cooking utensil is realized, and the temperature detection value of the cooking utensil is comprehensively calculated according to the spatial dispersion degree of the temperature sampling signals, so that the interference of individual abnormal temperature sensing devices on the temperature detection value is eliminated, or the deviation of the temperature detection value caused by inaccurate position of a cooker is eliminated, and the accuracy of temperature detection is improved.
In the second embodiment of the present invention, as shown in fig. 3, before step S100, the cooking appliance control method further includes the steps of:
step S410, acquiring the position of each temperature sensing device;
step S420, dividing the temperature sensing device into corresponding isothermal zones according to the position of the temperature sensing device.
As shown in fig. 4, in a cooking appliance, there are often a plurality of isothermal zones, and even in an ideal case, there is a small difference in temperature between the respective isothermal zones. In order to monitor the temperature of the cooking utensil comprehensively, a plurality of temperature sensing devices may be arranged in different isothermal zones, as shown in fig. 4, the temperature sensing devices 11 are all in the first isothermal zone, and the temperature sensing devices 12 are all in the second isothermal zone. Before analyzing the temperature sampling signals measured by the temperature sensing devices, the temperature sensing devices are divided into corresponding isothermal zones according to the positions of the temperature sensing devices, so that the accuracy of temperature detection is improved, the temperature detection range is enlarged, the running state of the cooking utensil is comprehensively controlled, and the cooking effect is improved.
In the third embodiment of the present invention, as shown in fig. 5, step S200 includes:
step S210, acquiring temperature sampling values of all temperature sampling signals in the isothermal zone at the same sampling time;
step S220, calculating the arithmetic mean value of all temperature sampling values, and recording as a first space mean value;
and step S230, calculating the spatial discrete degree of the temperature sampling signals in the isothermal zone according to the absolute value of the difference between each temperature sampling value and the first spatial average value.
Taking the cooking utensil shown in fig. 1 as an example, it is assumed that the temperature sampling signals measured by the temperature sensing devices are T1、T2、T3、T4、T5、T6Wherein, T1The temperature sampling signals measured by the temperature sensing devices 10 at the top in fig. 1 are respectively marked according to the clockwise rotation sequence. At sampling time t1A first number of samples N1＝N1(t1) The temperature sampling values of the temperature sampling signals are respectively T1(t1)、T2(t1)、T3(t1)、T4(t1)、T5(t1)、T6(t1) The arithmetic mean value of all temperature sampling values in the isothermal zone is
Figure BDA0001541533530000091
I.e. at the sampling instant t1The first spatial average of (a). According to T1(t1)、T2(t1)、T3(t1)、T4(t1)、T5(t1)、T6(t1) And
Figure BDA0001541533530000092
the absolute value of the difference of (a) represents the degree of spatial dispersion of the temperature sampling signal. When T is1(t1)、T2(t1)、T3(t1)、T4(t1)、T5(t1)、T6(t1) And
Figure BDA0001541533530000093
when the absolute values of the differences are all very small, the spatial dispersion degree of the temperature sampling signals is very small, and the consistency of the temperature sampling signals measured by the temperature sensing devices 10 is very good; otherwise, it indicates that the spatial dispersion degree of the temperature sampling signals is large, and the consistency between the temperature sampling signals measured by the temperature sensing devices 10 is also poor.
On the basis of the third embodiment, as shown in fig. 6, in a fourth embodiment of the present invention, step S300 includes:
step S310, comparing the absolute value of the difference of the first space average value subtracted from each temperature sampling value at the same sampling moment with a first preset difference value according to a preset sampling interval;
step S320, accumulating the number of first samples once when the absolute value of the difference between each temperature sampling value and the first space average value is less than or equal to a first preset difference value at the same sampling moment;
step S330, comparing the continuously accumulated first sampling number with a first preset number;
step S341, when the continuously accumulated first sampling number is greater than or equal to a first preset number, acquiring temperature sampling signals measured by each temperature sensing device in the isothermal zone;
step S342, acquiring temperature sampling values of all temperature sampling signals at the detection time and in the isothermal zone;
and S343, calculating the arithmetic mean value of all temperature sampling values in the isothermal zone at the detection time, and recording the arithmetic mean value as the temperature detection value of the cooking utensil.
Taking the cooking appliance shown in fig. 1 as an example, at the initial time, the first sampling number N 10. At sampling time t1A first number of samples N1＝N1(t1) When T is1(t1)、T2(t1)、T3(t1)、T4(t1)、T5(t1)、T6(t1) And
Figure BDA0001541533530000101
are all less than or equal to a first preset difference value Δ T1I.e. by
Figure BDA0001541533530000102
Figure BDA0001541533530000103
Figure BDA0001541533530000104
When all the samples are true, accumulating the first sampling number once, at this time N1＝N1(t1)+1. At the next sampling instant t2The above steps of obtaining temperature sample values of each temperature sample signal, calculating a first spatial average value, and comparing each temperature sample value with the first spatial average value are repeatedly performed, thereby performing the step of accumulating the first number of samples. Wherein the sampling time t1And a sampling time t2The time interval between is a preset sampling interval Δ t. By comparing a first number N of samples accumulated in succession1And a first predetermined number Ns1The time stability of the temperature sampling signal measured by each temperature sensing device 10 can be known. When the first number of samples N is continuously accumulated1Greater than or equal to a first preset number Ns1When indicates at least N is consecutives1In the secondary sampling, the temperature sampling signals measured by the temperature sensing devices in the isothermal zone have smaller spatial dispersion degree, and the running state of the cooking utensil in the period is normal, so the temperature sampling signals measured by the temperature sensing devices in the isothermal zone are obtained, and further, the temperature sampling signals at the detection time t are obtained according to the temperature sampling signalstestTemperature sampling value T1(ttest)、T2(ttest)、T3(ttest)、T4(ttest)、T5(ttest)、T6(ttest) And calculating the arithmetic mean of the above temperature samples, i.e.
Figure BDA0001541533530000105
And recording as the temperature detection value of the cooking utensil. By calculating the arithmetic mean value of the temperature sampling values as the temperature detection value, the difference of the temperature sampling signals measured by the temperature sensing devices 10 in the isothermal zone caused by accidental errors can be further eliminated, thereby improving the accuracy of measurement.
In the fifth embodiment of the present invention, as shown in fig. 7, step S342 includes:
step S342a, acquiring a time change rate of each temperature sampling signal in the isothermal zone within a sampling period;
step S342b, calculating the arithmetic mean value of the time change rates of all the temperature sampling signals in the isothermal zone, and recording the arithmetic mean value as a second space mean value;
step S342c, comparing the absolute value of the difference between the time change rate of each temperature sampling signal and the second spatial average value with a second preset difference value;
step S342d, when the absolute value of the difference between the time change rate of all the temperature sampling signals and the second spatial average value is less than or equal to a second preset difference value, acquiring the temperature sampling value of each temperature sampling signal in the isothermal zone at the detection time.
In this embodiment, whether the time stability of the temperature sensing device is normal is determined according to the time change rate of the temperature sampling signal. Specifically, taking the cooking utensil in fig. 1 as an example, the time change rate of each temperature sampling signal in the isothermal zone within the sampling period is T1′、T2′、T3′、T4′、T5′、T6', arithmetic mean of time rates of change of all temperature sampling signals in isothermal zone
Figure BDA0001541533530000111
I.e., the second spatial average value, and separately determines T1′、T2′、T3′、T4′、T5′、T6' and
Figure BDA0001541533530000112
whether the absolute value of the difference of (a) is less than or equal to a second presetDifference Δ T2', respectively determine whether the following relationships hold:
Figure BDA0001541533530000113
Figure BDA0001541533530000114
if the above relations are all established, the time change rates of all the temperature sensing devices are normal in the sampling period, and the time t at the detection moment is obtainedtestTemperature sampling value T1(ttest)、T2(ttest)、T3(ttest)、T4(ttest)、T5(ttest)、T6(ttest) The temperature detection value of the cooking utensil is further obtained, the detection accuracy is improved, and the interference of sudden change of part of temperature sensing devices on the temperature detection is eliminated.
On the basis of the fifth embodiment, as shown in fig. 8, in the sixth embodiment of the present invention, after step S342c, the following steps are further included:
step S342e, when the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is greater than the second preset difference value, determining whether the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is less than or equal to a third preset difference value;
if yes, go to step S342f, modify the temperature sampling signal according to the first preset modification coefficient;
step 342g, acquiring a temperature detection value of the cooking utensil according to the temperature sampling signal of the first normal temperature sensing device and the corrected temperature sampling signal of the first abnormal temperature sensing device in the isothermal zone;
if not, step S342h is executed to generate and output a first prompt signal to prompt the temperature sensing device to have an abnormality.
When the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is less than or equal to a second preset difference value, recording the corresponding temperature sensing device as a first normal temperature sensing device; subtracting the second space from the time change rate of the temperature sampling signalAnd when the absolute value of the difference of the average values is greater than a second preset difference value, recording the corresponding temperature sensing device as a first abnormal temperature sensing device. Also, in the present embodiment, the third preset difference Δ T3' greater than a second predetermined difference Δ T2'. When the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is larger than a second preset difference value delta T2In the meantime, it indicates that there is an abnormality in the temperature sensing device that measures the temperature sampling signal, and the abnormality may be caused by a failure of the temperature sensing device itself, or may be caused by a severe temperature change due to a pan pasting or the like at the location of the temperature sensing device. Further, whether the abnormality is within the correctable range is judged by judging whether the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is less than or equal to a third preset difference value. When the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is smaller than or equal to a third preset difference value, correcting the temperature sampling signal according to a first preset correction coefficient, and further acquiring the temperature detection value of the cooking utensil according to the corrected temperature sampling signal of the first abnormal temperature sensing device and the temperature sampling signal measured by the first normal temperature sensing device; when the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is greater than a third preset difference value, the abnormality of the temperature sensing device is serious and cannot be automatically corrected, and a first prompt signal is generated and output to prompt a user that the abnormality of the temperature sensing device exists so as to be checked by the user. The prompt signal may be a preset buzzing sound with a certain rule, a voice prompt signal, a display screen prompt signal, or the like. In a specific example, a linear compensation is used, according to
Figure BDA0001541533530000121
Calculating a corrected temperature sampling value at the sampling time, wherein AiAnd BiTo preset the correction factor, it can be experimentally determined that, in the cooking appliance shown in fig. 1, i can take a positive integer between 1 and 6. Further, it is assumed that the temperature sampling signal measured by the first normal temperature sensing device includes T1、T2、T3And T5The temperature sampling signal measured by the first abnormal temperature sensing device includes T4And T6The corrected temperature sampling signal is
Figure BDA0001541533530000122
And
Figure BDA0001541533530000123
then, the temperature detection value of the cooking appliance at the detection time can be based on
Figure BDA0001541533530000124
And obtaining, namely calculating an arithmetic mean of temperature sampling values of the temperature sampling signal of the first normal temperature sensing device and the corrected temperature sampling signal of the first abnormal temperature sensing device at the detection time so as to improve the accuracy of temperature detection.
On the basis of the third embodiment, as shown in fig. 9, in a seventh embodiment of the present invention, step S300 includes:
step S350, comparing the absolute value of the difference of the first space average value subtracted from each temperature sampling value at the same sampling moment with a first preset difference value according to a preset sampling interval;
step S360, when the absolute value of the difference between the temperature sampling value and the first space average value is larger than a first preset difference value at the same sampling moment, clearing the first sampling number;
step S371, acquiring the number of second abnormal temperature sensing devices in the isothermal zone at the same sampling time, and recording as the abnormal number;
step S372, comparing the abnormal number with a second preset number;
step S373, when the abnormal number is smaller than a second preset number, correcting the temperature sampling signal of the second abnormal temperature sensing device according to a second preset correction coefficient;
and step S374, acquiring a temperature detection value of the cooking utensil according to the temperature sampling signal of the second normal temperature sensing device and the corrected temperature sampling signal of the second abnormal temperature sensing device in the isothermal zone.
Wherein, when the temperature sampling valueWhen the absolute value of the difference of subtracting the first space average value is less than or equal to a first preset difference value, recording the corresponding temperature sensing device as a second normal temperature sensing device; and when the absolute value of the difference between the temperature sampling value and the first space average value is greater than a first preset difference value, recording the corresponding temperature sensing device as a second abnormal temperature sensing device. After the first sampling number is cleared, the temperature sensing device which has a larger difference between at least one measured temperature sampling signal and temperature sampling signals measured by other temperature sensing devices exists in the same isothermal zone. In this embodiment, when the absolute value of the difference between the temperature sampling value and the first spatial average value at the same sampling time is greater than the first preset difference value, it indicates that the spatial dispersion degree between the temperature sensing devices is large, and in the case of an electromagnetic cooking appliance, this may occur due to a deviation in the position where a pot is placed on the cooking appliance, and a corresponding process is required. Specifically, the first number of samples is cleared, i.e., N is set at this time 10. Judging the condition of the position deviation of the cookware by acquiring the number of the abnormal second abnormal temperature sensing devices, and if the abnormal number is smaller than a second preset number Ns2And if the position deviation of the cookware is smaller, the temperature sampling signal of the second abnormal temperature sensing device can be corrected according to a second preset correction coefficient, and the temperature detection value of the cooking utensil can be further obtained according to the temperature sampling signal of the second normal temperature sensing device in the isothermal zone and the corrected temperature sampling signal of the second abnormal temperature sensing device.
It should be noted that, in this embodiment, after comparing the absolute value of the difference between the first spatial average and each temperature sample value at the same sampling time by the first preset difference, if the absolute value of the difference between all the temperature sample values and the first spatial average at the same sampling time is less than or equal to the first preset difference, the first sampling number is accumulated, and the subsequent steps in the fourth embodiment are continuously executed; otherwise, the first sampling number is cleared, and the subsequent steps in the embodiment are continuously executed.
On the basis of the seventh embodiment, as shown in fig. 10, in an eighth embodiment of the present invention, step S373 includes:
step S373a, accumulating the second number of samples;
step S373b, comparing the second sampling number with a third preset number;
step S373c, when the second sampling number is greater than or equal to a third preset number, calculating an arithmetic average value of the measured temperature sampling signals of each temperature sensing device in the sampling duration corresponding to the second sampling number and about the second sampling number, and recording the arithmetic average value as a first time average value;
step S373d, calculating an arithmetic mean value of the first time mean values of all the second normal temperature sensing devices in the isothermal zone, and recording the arithmetic mean value as a third space mean value;
step S373e, comparing the absolute value of the difference between the first time average value and the third space average value of each second abnormal temperature sensing device with a fourth preset difference value;
and step S373f, when the absolute value of the difference between the first time average and the third space average is less than or equal to a fourth preset difference, correcting the temperature sampling signal of the second abnormal temperature sensing device according to a second preset correction coefficient.
In this embodiment, the temperature sampling signals of the respective temperature sensing devices are monitored in the sampling period corresponding to the second sampling number by accumulating the second sampling number. When the second sampling number is greater than or equal to the third preset number Ns3In time, the abnormity of the second abnormity temperature sensing device is caused by the deviation of the placement of the cookware, but not caused by the sudden change of the temperature sensing device. Further, the measured temperature sampling signals of the temperature sensing devices in the sampling time length corresponding to the second sampling number N are calculated2Is taken as the first time average
Figure BDA0001541533530000141
Judging whether the deviation of the temperature sampling signal caused by the deviation of the position of the cooker is repairable or not by calculating the arithmetic mean of the first time mean of the normal temperature sensing devices in the isothermal zone and comparing the absolute value of the difference of the first time mean minus the third space mean of the second abnormal temperature sensing devices with a fourth preset difference valueAnd in the positive range, if the temperature sampling value can be corrected, correcting the temperature sampling signal of the second abnormal temperature sensing device according to a second preset correction coefficient, and further acquiring the temperature sampling value of the cooking utensil at the detection moment according to the temperature sampling signal of the second normal temperature sensing device and the corrected temperature sampling signal of the second abnormal temperature sensing device. Taking the cooking utensil shown in fig. 1 as an example, the first time average values of the six temperature sensing devices are respectively
Figure BDA0001541533530000142
Figure BDA0001541533530000151
Wherein, tjCorresponding to the second number of sample instants. Assuming that the first temperature sensing device is a second abnormal temperature sensing device and the other temperature sensing devices are second normal temperature sensing devices, the third space average value
Figure BDA0001541533530000152
If it is
Figure BDA0001541533530000153
Then according to
Figure BDA0001541533530000154
Calculating a corrected temperature sample value at the sampling time, wherein CiAnd DiFor presetting the correction factor, it can be determined experimentally, on the assumption described above, in the cooking appliance shown in fig. 1, i.e.
Figure BDA0001541533530000155
Further in accordance with
Figure BDA0001541533530000156
A temperature detection value of the cooking appliance at the detection time can be obtained.
On the basis of the eighth embodiment, as shown in fig. 11, in the ninth embodiment of the present invention, after step S373e, the following steps are further included:
step S373g, when the absolute value of the difference between the first time average value and the third space average value of the second abnormal temperature sensing device is greater than the fourth preset difference value, generating and outputting a second prompt signal to prompt that the position of the pot on the cooking utensil is abnormal.
When the absolute value of the difference between the first time average value and the third space average value of the second abnormal temperature sensing device is greater than the fourth preset difference value, the difference of the position of the pot is serious, and an accurate temperature sampling value cannot be obtained through correction, so that a second prompt signal is generated and output to prompt that the position of the pot on the cooking utensil is abnormal, and a user can correct the position conveniently.
On the basis of the seventh embodiment, as shown in fig. 12, in the tenth embodiment of the present invention, after step S372, the following steps are further included:
step S375, when the number of the exceptions is greater than or equal to a second preset number, accumulating the sampling duration of which the number of the exceptions is greater than or equal to the second preset number;
step S376, comparing the continuously accumulated sampling duration with a preset duration;
and step S377, when the continuously accumulated sampling time length is greater than or equal to the preset time length, controlling the cooking appliance to stop heating, generating and outputting a third prompt signal to prompt that the position of a pot on the cooking appliance is abnormal.
In this embodiment, if the number of anomalies is greater than or equal to the second preset number, it indicates that the temperature sampling signals measured by the temperature sensing devices have a larger spatial dispersion degree. Further, if the sampling duration of the continuously accumulated abnormality number is greater than or equal to the second preset number is greater than the preset duration, that is, the abnormality is caused by an abnormal pot placing position or a pot too small to completely cover the heating area of the cooking utensil, rather than an abrupt change of the temperature sensing device. In this case, because the pan position deviation is great, or the pan is too little to effectively cover the zone of heating, in order to avoid taking place danger, control cooking utensil and stop heating, and generate and output the third cue signal to the suggestion pan position that is located cooking utensil has the anomaly, so that the user handles.
The present invention also provides a cooking appliance, as shown in fig. 1, 4 and 13, comprising at least two temperature sensing devices 10 disposed in the same isothermal zone, a memory 20, a processor 30 and a cooking control program stored in the memory 20 and operable on the processor 30. In order to reduce mutual interference and influence, the connections between the temperature sensing devices 10 and the processor 30 are independent of each other and are respectively connected with the processor 30 through respective sampling circuits to realize separate transmission of data, so that data of all the temperature sensing devices 10 can be processed synchronously. By the synchronous sampling and processing mode, large-area and wide-range temperature changes can be monitored simultaneously so as to be used for evaluating the overall temperature state of the cooking appliance.
The processor 30 calls the cooking appliance control program stored on the memory 20 and performs the following operations:
synchronously acquiring temperature sampling signals measured by temperature sensing devices in the same isothermal zone;
acquiring the spatial dispersion degree of a temperature sampling signal in the isothermal zone;
and acquiring a temperature detection value of the cooking appliance according to the space discrete degree and the temperature sampling signal.
The processor 30 calls the cooking utensil control program stored in the memory 20, and further performs the following operations before the operation of synchronously acquiring the temperature sampling signals measured by the temperature sensing devices in the same isothermal zone:
acquiring the position of each temperature sensing device;
and dividing the temperature sensing device into corresponding isothermal zones according to the position of the temperature sensing device.
The processor 30 invokes a cooking utensil control program stored on the memory 20, and the operation of obtaining the spatial dispersion degree of the temperature sampling signal in the isothermal zone includes:
acquiring temperature sampling values of all temperature sampling signals in an isothermal zone at the same sampling time;
calculating the arithmetic mean value of all temperature sampling values, and recording as a first space mean value;
and calculating the spatial discrete degree of the temperature sampling signals in the isothermal zone according to the absolute value of the difference between the temperature sampling values and the first spatial average value.
The operation of the processor 30 calling the cooking appliance control program stored in the memory 20 to acquire the temperature detection value of the cooking appliance according to the spatial dispersion degree and the temperature sampling signal includes:
comparing the absolute value of the difference of the first space average value subtracted from each temperature sampling value at the same sampling moment with a first preset difference value according to a preset sampling interval;
accumulating the first sampling number once when the absolute value of the difference between each temperature sampling value and the first space average value is less than or equal to a first preset difference value at the same sampling moment;
comparing the continuously accumulated first sampling number with a first preset number;
when the continuously accumulated first sampling number is larger than or equal to a first preset number, acquiring temperature sampling signals measured by each temperature sensing device in the isothermal zone;
acquiring temperature sampling values of all temperature sampling signals in a detection time and an isothermal zone;
and calculating the arithmetic mean value of all temperature sampling values in the detection time and the isothermal zone, and recording the arithmetic mean value as the temperature detection value of the cooking utensil.
The operation of the processor 30 calling the cooking appliance control program stored in the memory 20 to acquire the temperature sampling values of the respective temperature sampling signals in the isothermal zone at the detection time includes:
acquiring the time change rate of each temperature sampling signal in the isothermal zone within a sampling period;
calculating the arithmetic mean value of the time change rates of all the temperature sampling signals in the isothermal zone, and recording the arithmetic mean value as a second space mean value;
comparing the absolute value of the difference of the time change rate of each temperature sampling signal minus the second spatial average value with a second preset difference value;
and when the absolute value of the difference between the time change rate of all the temperature sampling signals and the second spatial average value is less than or equal to a second preset difference value, acquiring the temperature sampling value of each temperature sampling signal at the detection time in the isothermal zone.
The processor 30 calls the cooking appliance control program stored on the memory 20, and after the operation of comparing the absolute value of the difference between the time change rate of each temperature sampling signal and the second spatial average value and the second preset difference value, further performs the following operations:
when the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is larger than a second preset difference value, judging whether the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is smaller than or equal to a third preset difference value or not;
if so, correcting the temperature sampling signal according to a first preset correction coefficient;
acquiring a temperature detection value of the cooking utensil according to a temperature sampling signal of a first normal temperature sensing device and a corrected temperature sampling signal of a first abnormal temperature sensing device in the isothermal zone;
if not, generating and outputting a first prompt signal to prompt that the temperature sensing device is abnormal;
wherein the third preset difference is greater than the second preset difference; when the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is less than or equal to a second preset difference value, recording the corresponding temperature sensing device as a first normal temperature sensing device; and when the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is greater than a second preset difference value, recording the corresponding temperature sensing device as a first abnormal temperature sensing device.
The operation of the processor 30 calling the cooking appliance control program stored in the memory 20 to acquire the temperature detection value of the cooking appliance according to the spatial dispersion degree and the temperature sampling signal includes:
comparing the absolute value of the difference of the first space average value subtracted from each temperature sampling value at the same sampling moment with a first preset difference value according to a preset sampling interval;
when the absolute value of the difference between the temperature sampling value and the first space average value is larger than a first preset difference value at the same sampling moment, resetting the first sampling number;
acquiring the number of second abnormal temperature sensing devices in the isothermal zone at the same sampling moment, and recording the number as the abnormal number;
comparing the abnormal number with a second preset number;
when the abnormal number is smaller than a second preset number, correcting the temperature sampling signal of the second abnormal temperature sensing device according to a second preset correction coefficient;
acquiring a temperature detection value of the cooking utensil according to a temperature sampling signal of a second normal temperature sensing device and a corrected temperature sampling signal of a second abnormal temperature sensing device in the isothermal zone;
when the absolute value of the difference between the temperature sampling value and the first space average value is less than or equal to a first preset difference value, the corresponding temperature sensing device is marked as a second normal temperature sensing device; and when the absolute value of the difference between the temperature sampling value and the first space average value is greater than a first preset difference value, recording the corresponding temperature sensing device as a second abnormal temperature sensing device.
The operation of the processor 30 calling the cooking appliance control program stored in the memory 20 to correct the temperature sampling signal of the second abnormal temperature sensing device according to the second preset correction coefficient includes:
accumulating the second number of samples;
comparing the second sampling number with a third preset number;
when the second sampling number is greater than or equal to a third preset number, calculating the arithmetic mean value of the measured temperature sampling signals of each temperature sensing device relative to the second sampling number in the sampling duration corresponding to the second sampling number, and recording the arithmetic mean value as a first time mean value;
calculating the arithmetic mean value of the first time mean values of all the second normal temperature sensing devices in the isothermal zone, and recording as a third space mean value;
comparing the absolute value of the difference between the first time average value and the third space average value of each second abnormal temperature sensing device with a fourth preset difference value;
and when the absolute value of the difference between the first time average value and the third space average value is less than or equal to a fourth preset difference value, executing the step of correcting the temperature sampling signal of the second abnormal temperature sensing device according to a second preset correction coefficient.
The processor 30 calls the cooking utensil control program stored in the memory 20, and after the operation of comparing the absolute value of the difference between the first time average value and the third space average value of each second abnormal temperature sensing device with a fourth preset difference value, further performs the following operations:
and when the absolute value of the difference between the first time average value and the third space average value is greater than a fourth preset difference value, generating and outputting a second prompt signal to prompt that the position of a pot on the cooking utensil is abnormal.
The processor 30 calls the cooking appliance control program stored on the memory 20, and after comparing the number of anomalies with a second preset number, further performs the following operations:
when the number of the exceptions is larger than or equal to a second preset number, accumulating the sampling duration of which the number of the exceptions is larger than or equal to the second preset number;
comparing the sampling time length with a preset time length;
when the sampling duration is longer than or equal to the preset duration, the cooking appliance is controlled to stop heating, and a third prompt signal is generated and output to prompt that the position of a pot on the cooking appliance is abnormal.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (7)

1. A cooking utensil control method is characterized in that the cooking utensil comprises at least two temperature sensing devices arranged in the same isothermal zone;
the cooking appliance control method includes the steps of:
synchronously acquiring temperature sampling signals measured by the temperature sensing devices in the same isothermal zone; the temperature sampling signal is a signal of which the temperature measured by the temperature sensing device changes along with time;
acquiring the spatial discrete degree of the temperature sampling signal in the isothermal zone;
acquiring a temperature detection value of the cooking appliance according to the space discrete degree and the temperature sampling signal;
wherein the step of obtaining the spatial dispersion degree of the temperature sampling signal in the isothermal zone comprises: acquiring temperature sampling values of the temperature sampling signals in the isothermal zone at the same sampling time; calculating the arithmetic mean value of all the temperature sampling values, and recording as a first space mean value; calculating the spatial discrete degree of the temperature sampling signals in the isothermal zone according to the absolute value of the difference between the temperature sampling values and the first spatial average value;
the step of acquiring the temperature detection value of the cooking appliance according to the space discrete degree and the temperature sampling signal comprises the following steps:
comparing the absolute value of the difference between the temperature sampling values and the first space average value at the same sampling time with a first preset difference value according to a preset sampling interval;
accumulating a first sampling number once when the absolute value of the difference between each temperature sampling value and the first spatial average value is less than or equal to a first preset difference value at the same sampling time;
comparing the first sampling number and a first preset number which are continuously accumulated;
when the continuously accumulated first sampling number is larger than or equal to a first preset number, acquiring temperature sampling signals measured by each temperature sensing device in the isothermal zone;
acquiring temperature sampling values of the temperature sampling signals in the isothermal zone at the detection time;
and calculating the arithmetic mean value of all the temperature sampling values in the isothermal zone at the detection time, and recording the arithmetic mean value as the temperature detection value of the cooking utensil.
2. The cooking appliance control method according to claim 1, wherein before the step of synchronously acquiring the temperature sampling signals measured by the temperature sensing devices in the same isothermal zone, the cooking appliance control method further comprises the steps of:
acquiring the position of each temperature sensing device;
and dividing the temperature sensing device into corresponding isothermal zones according to the position of the temperature sensing device.
3. The cooking appliance control method according to claim 1, wherein the step of acquiring the temperature sampling value of each of the temperature sampling signals in the isothermal zone at the detection time comprises:
acquiring the time change rate of each temperature sampling signal in the isothermal zone within a sampling period;
calculating the arithmetic mean value of the time change rates of all the temperature sampling signals in the isothermal zone, and recording the arithmetic mean value as a second space mean value;
comparing the absolute value of the difference between the time change rate of each temperature sampling signal and the second spatial average value with a second preset difference value;
and when the absolute value of the difference between the time change rate of all the temperature sampling signals and the second spatial average value is less than or equal to a second preset difference value, acquiring the temperature sampling value of each temperature sampling signal in the isothermal zone at the detection moment.
4. The cooking appliance control method of claim 3, wherein after the step of subtracting an absolute value of a difference of the second spatial average value and a second preset difference value from the time change rate of each of the temperature sampling signals, further comprising the steps of:
when the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is larger than a second preset difference value, judging whether the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is smaller than or equal to a third preset difference value;
if so, correcting the temperature sampling signal according to a first preset correction coefficient;
acquiring a temperature detection value of the cooking utensil according to a temperature sampling signal of a first normal temperature sensing device and a corrected temperature sampling signal of a first abnormal temperature sensing device in the isothermal zone;
if not, generating and outputting a first prompt signal to prompt that the temperature sensing device is abnormal;
wherein the third preset difference is greater than the second preset difference; when the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is less than or equal to a second preset difference value, recording the corresponding temperature sensing device as a first normal temperature sensing device; and when the absolute value of the difference between the time change rate of the temperature sampling signal and the second spatial average value is greater than a second preset difference value, recording the corresponding temperature sensing device as a first abnormal temperature sensing device.
5. The cooking appliance control method according to claim 1, wherein the step of acquiring the temperature detection value of the cooking appliance based on the spatial dispersion degree and the temperature sampling signal comprises:
comparing the absolute value of the difference between the temperature sampling values and the first space average value at the same sampling time with a first preset difference value according to a preset sampling interval;
when the absolute value of the difference between the temperature sampling value and the first space average value is larger than a first preset difference value at the same sampling moment, clearing a first sampling number;
acquiring the number of second abnormal temperature sensing devices in the isothermal zone at the same sampling time, and recording the number as the abnormal number;
comparing the abnormal number with a second preset number;
when the abnormal number is smaller than the second preset number, correcting the temperature sampling signal of the second abnormal temperature sensing device according to a second preset correction coefficient;
acquiring a temperature detection value of the cooking utensil according to a temperature sampling signal of a second normal temperature sensing device and a corrected temperature sampling signal of a second abnormal temperature sensing device in the isothermal zone;
when the absolute value of the difference between the temperature sampling value and the first space average value is less than or equal to a first preset difference value, the corresponding temperature sensing device is marked as a second normal temperature sensing device; and when the absolute value of the difference between the temperature sampling value and the first space average value is greater than a first preset difference value, recording the corresponding temperature sensing device as a second abnormal temperature sensing device.
6. The cooking appliance control method of claim 5, further comprising the step of, after the step of comparing the number of anomalies to a second preset number:
when the abnormal number is greater than or equal to the second preset number, accumulating the sampling duration of which the abnormal number is greater than or equal to the second preset number;
comparing the sampling duration and the preset duration which are continuously accumulated;
when the sampling duration that accumulates in succession is greater than or equal to and predetermines the duration, control cooking utensil stop heating generates and output third cue signal to the suggestion is located there is unusually cooking utensil last pan position.
7. A cooking appliance comprising at least two temperature sensing devices disposed in the same isothermal zone, a memory, a processor, and a cooking control program stored in the memory and executable on the processor, wherein the cooking control program when executed by the processor implements the steps of the cooking appliance control method of any one of claims 1 to 6.
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