Automatic calibration method for infrared temperature measurement precision of cooking utensil and cooking utensil

Abstract

According to the automatic calibration method for the infrared temperature measurement precision of the cooking utensil, the cooking utensil comprises an infrared temperature measurement device, the infrared temperature measurement device comprises an optical filter, and the method comprises the steps that after the cooking utensil is started to work, current radiation data of the infrared temperature measurement device on the surface of a food material is measured; comparing the pre-stored standard radiation data with the current radiation data to determine a temperature measurement compensation coefficient, and determining whether the pollution degree of the optical filter exceeds the upper limit of the compensation range based on the temperature measurement compensation coefficient; and if the temperature does not exceed the upper limit of the compensation range, compensating the current radiation data based on the temperature measurement compensation coefficient so as to calculate the actual temperature of the surface of the food material based on the compensated compensation radiation data.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to an automatic calibration method for infrared temperature measurement accuracy of a cooking appliance and the cooking appliance. Background Art

[0002] In the field of household electrical appliances, cooking appliances such as rice cookers often use infrared temperature measurement technology to measure temperature in order to achieve precise control of the cooking process. Infrared temperature measurement technology is widely used because of its rapid response and high accuracy. However, in actual use, the accuracy of infrared temperature measurement devices is often affected by their key components, filters.

[0003] Optical filters play a vital role in infrared temperature measurement devices. They can selectively transmit infrared light while blocking visible light and ultraviolet light, thereby ensuring that the infrared temperature measurement device can accurately sense the infrared radiation of the target object. However, due to the particularity of the cooking environment, optical filters often face the risk of contamination. Especially during the cooking process, the optical filter may come into contact with overflowing rice soup or other ingredients. Once these substances form stains on the optical filter, its ability to transmit infrared light will be significantly reduced.

[0004] The contamination of the filter has a serious impact on the accuracy of the infrared temperature measurement device. Experimental data show that the temperature measurement accuracy will be significantly reduced as the light transmittance of the filter decreases. This temperature measurement error will not only affect the cooking logic of the cooking appliance, resulting in unstable cooking results, but also reduce the user experience. For example, in a rice cooker, if the filter is blocked by rice soup stains, it may cause inaccurate temperature measurement, which in turn affects the cooking effect and taste of the rice.

[0005] Therefore, how to solve the impact of filter contamination on the accuracy of infrared temperature measurement has become a key issue in improving the performance of cooking appliances and user experience. Summary of the invention

[0006] The present application provides a control method for a cooking appliance in the heat preservation stage to solve at least one of the above-mentioned technical problems.

[0007] The technical solution adopted in this application is:

[0008] On the one hand, an embodiment of the present application provides a method for automatically calibrating the infrared temperature measurement accuracy of a cooking utensil, the cooking utensil comprising an infrared temperature measuring device, the infrared temperature measuring device comprising a filter, the method comprising: after the cooking utensil is started, measuring current radiation data of the infrared temperature measuring device on the surface of food; comparing pre-stored standard radiation data with the current radiation data to determine a temperature measurement compensation coefficient, and based on the temperature measurement compensation coefficient, determining whether the contamination degree of the filter exceeds an upper limit of a compensation range; if it does not exceed the upper limit of the compensation range, compensating the current radiation data based on the temperature measurement compensation coefficient, so as to calculate the actual temperature of the surface of the food based on the compensated radiation data.

[0009] In one implementation of the present application, the method further includes: if the upper limit of the compensation range is exceeded, a filter cleaning alarm is issued based on a preset alarm method.

[0010] In an implementation of the present application, the method further includes: before the cooking appliance is used, setting an upper limit of the compensation range based on a sensitivity parameter in a specification attribute of the infrared temperature measuring device.

[0011] In one implementation of the present application, the upper limit of the compensation range is between 1.2 and 1.5.

[0012] In one implementation of the present application, the method further includes: after the cooking appliance is started for the first time, determining that the radiation data of the infrared temperature measuring device on the surface of the food material measured is standard radiation data.

[0013] In an implementation of the present application, the infrared temperature measurement device further includes: an infrared temperature measurement control board, and the infrared temperature measurement control board is used to store the standard radiation data.

[0014] In one implementation of the present application, the radiation data is the emissivity, and the actual temperature of the surface of the food is calculated based on the compensated emissivity, which is expressed by the following formula:

[0015] P=ηε0·σ·T 4

[0016]

[0017] Where P is the radiant heat emitted per unit time by the food surface, η is the compensated emissivity, ε0 ​​is the standard emissivity, σ is the Stefan-Boltzmann constant, T is the absolute temperature of the object surface, ε T Current emissivity.

[0018] In one implementation of the present application, the cooking utensil is an electric rice cooker, which includes a heating device; the cooking stages of the electric rice cooker include a water absorption stage, a heating stage, a boiling stage, a temperature-increasing stage and a rice stewing stage; in the heating stage and / or boiling stage, the infrared temperature measuring device obtains the heating power information of the heating device, and matches the temperature measurement compensation coefficient of the cooking stage based on the heating power information; based on the temperature measurement compensation coefficient of the cooking stage, the radiation data of the cooking stage is compensated.

[0019] In one implementation of the present application, the infrared temperature measurement control board is also used to receive the heating power information transmitted by the heating device through a preset serial port.

[0020] On the other hand, an embodiment of the present application also provides a cooking utensil, comprising a pot body, a pot lid and a control module, wherein the pot lid is provided with a metal inner cover, the pot body is provided with a heating device, and the control module is provided with a processor, and is characterized in that it also includes an infrared temperature measuring device, the infrared temperature measuring device is provided on the pot lid, the metal inner cover is provided with an infrared perforation corresponding to the infrared temperature measuring device, a filter is provided on the infrared perforation, the control module is electrically connected to the infrared temperature measuring device, and the processor stores a computer program that can be run on the processor, and when the processor executes the program, the steps in any one of the methods are implemented.

[0021] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0022] 1. By measuring the current radiation data of the food surface by the infrared temperature measuring device in real time and comparing it with the pre-stored standard radiation data, the temperature measurement compensation coefficient can be accurately determined, effectively eliminating the influence of filter contamination on temperature measurement accuracy, and ensuring the accuracy of temperature measurement during the cooking process.

[0023] 2. By comparing the temperature measurement compensation coefficient, it can intelligently determine whether the degree of contamination of the filter exceeds the compensation range of automatic calibration, so that users can timely understand the cleanliness of the filter, thereby maintaining the optimal performance of the temperature measuring device. When the degree of contamination of the filter exceeds the upper limit of the compensation range, the filter cleaning alarm is performed based on the preset alarm method to remind the user to clean the filter in time to avoid the decrease in temperature measurement accuracy due to long-term contamination, thereby ensuring cooking quality and user experience. In addition, according to the specification attributes and sensitivity parameters of the infrared temperature measuring device, the user can flexibly set the upper limit of the compensation range, so that the system can adapt to infrared temperature measuring devices of different specifications and performances, improving the versatility and adaptability of the system.

[0024] 3. By introducing the Stefan-Boltzmann law and the temperature measurement compensation coefficient, the actual temperature of the food surface can be scientifically calculated. It is not only highly accurate, but also can reflect the temperature changes during the cooking process in real time, providing strong support for the intelligent control of cooking utensils. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0026] Figure 1 A flow chart of an automatic calibration method for infrared temperature measurement accuracy of a cooking appliance provided in an embodiment of the present application;

[0027] Figure 2 A temperature measurement accuracy calibration flow chart provided for this application;

[0028] Figure 3 A structural block diagram of a cooking appliance provided in an embodiment of the present application;

[0029] Figure 4 A schematic diagram of the structure of a cooking utensil provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0032] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0035] In one embodiment of the present application, a method for automatically calibrating the infrared temperature measurement accuracy of a cooking appliance is provided, and the cooking appliance used includes an infrared temperature measurement device, and the infrared temperature measurement device includes a filter.

[0036] The following is an explanation of the automatic calibration method of infrared temperature measurement accuracy of a cooking appliance in the present application through the accompanying drawings.

[0037] Figure 1 This is a flow chart of a method for automatically calibrating the infrared temperature measurement accuracy of a cooking appliance provided in an embodiment of the present application. Figure 1 As shown, an automatic calibration method for infrared temperature measurement accuracy of a cooking appliance provided in an embodiment of the present application specifically comprises the following steps:

[0038] Step 101: After the cooking appliance starts working, measure the current radiation data of the infrared temperature measuring device on the surface of the food;

[0039] Step 102: compare the pre-stored standard radiation data with the current radiation data to determine the temperature measurement compensation coefficient, and determine whether the contamination degree of the filter exceeds the upper limit of the compensation range based on the temperature measurement compensation coefficient;

[0040] Step 103: If the upper limit of the compensation range is not exceeded, the current radiation data is compensated based on the temperature measurement compensation coefficient, so as to calculate the actual temperature of the surface of the food based on the compensated radiation data.

[0041] It is understandable that there are several problems in the existing infrared temperature measurement technology for cooking utensils: first, due to the influence of factors such as oil smoke and steam in the cooking environment, the filter of the infrared temperature measurement device is easily contaminated, which will lead to a decrease in the temperature measurement accuracy; second, the surface radiation data of different ingredients are different, and the existing infrared temperature measurement devices often default to a fixed radiation data for calculation, which will undoubtedly introduce errors; finally, during the use of cooking utensils, changes in ambient temperature and humidity will also affect the accuracy of infrared temperature measurement.

[0042] In a possible implementation of the present application, the radiation data may be a radiation rate or a radiation value.

[0043] The automatic calibration method for infrared temperature measurement accuracy of cooking utensils of the present application effectively solves the above problems. First, the method can measure the current radiation data of the infrared temperature measuring device on the surface of the food in real time, so that the temperature can be calculated according to the actual radiation data of the surface of the food, which greatly improves the accuracy of the temperature measurement. Secondly, the present application determines the temperature measurement compensation coefficient by comparing the pre-stored standard radiation data and the current radiation data, so that the degree of contamination of the filter can be evaluated, and when the degree of contamination of the filter does not exceed the upper limit of the compensation range, the current radiation data is compensated based on the temperature measurement compensation coefficient. Therefore, even if the filter is contaminated to a certain extent, the accuracy of the temperature measurement can be guaranteed. Finally, through real-time calculation and compensation, the present application can effectively offset the influence of changes in ambient temperature and humidity on infrared temperature measurement.

[0044] The embodiment of the present application greatly improves the accuracy and stability of infrared temperature measurement by measuring and compensating the radiation data on the surface of the food in real time, as well as evaluating the degree of filter contamination. This can not only enhance the user experience of the cooking utensils, but also ensure the temperature control accuracy of the food during the cooking process, thereby improving the cooking quality. At the same time, since the contamination of the filter can be fed back in real time, it is also convenient for the user to clean and replace the filter in time, further ensuring the accuracy of infrared temperature measurement. This method has significant advantages and practical value in practical applications.

[0045] Embodiment 1:

[0046] In a possible implementation of the present application, before the cooking appliance is used, an upper limit of the compensation range is set based on a sensitivity parameter in the specification attributes of the infrared temperature measuring device.

[0047] In a possible implementation of the present application, the upper limit of the compensation range is between 1.2 and 1.5.

[0048] It is understandable that when cooking appliances leave the factory or before use, users need to have a detailed understanding and setting of the specifications and attributes of their infrared temperature measuring devices. Among them, the sensitivity parameter is one of the important specifications and attributes of the infrared temperature measuring device, which reflects the sensitivity of the device to temperature changes. Based on this sensitivity parameter, we can reasonably set the upper limit of the compensation range.

[0049] In one embodiment, if the sensitivity of the infrared temperature measuring device is high, then its reaction to temperature changes will be more acute, and the upper limit of the compensation range can be set slightly lower, for example, selecting an interval of 1.2 to 1.3. On the contrary, if the sensitivity is low, the device will be relatively slow to react to temperature changes, and the upper limit of the compensation range needs to be set slightly higher, for example, selecting an interval of 1.4 to 1.5. In actual operation, the user can obtain the sensitivity parameters of the infrared temperature measuring device according to the instruction manual of the cooking utensil or contact the manufacturer, and then set a reasonable upper limit of the compensation range according to the above principles. After setting a reasonable upper limit of the compensation range, the cooking utensil can be operated according to the aforementioned automatic calibration method for infrared temperature measurement accuracy of the cooking utensil after starting to work. When the degree of contamination of the filter does not exceed the set upper limit of the compensation range, the current radiation data is compensated based on the temperature measurement compensation coefficient to ensure the accuracy of the temperature measurement.

[0050] This embodiment sets the upper limit of the compensation range based on the sensitivity parameter, so that the automatic calibration of the infrared temperature measurement accuracy is more in line with the actual use situation, and the accuracy and stability of the temperature measurement are improved. Among them, the reasonable setting of the upper limit of the compensation range can effectively avoid the influence of the light pollution of the filter on the temperature measurement accuracy, and at the same time can timely remind the user to clean or replace the heavily polluted filter, thereby ensuring the long-term stable operation of the infrared temperature measurement device. In addition, this method is simple and easy to implement. The user only needs to obtain the sensitivity parameters according to the instructions of the cooking utensils or contact the manufacturer to set a reasonable upper limit of the compensation range by himself, without the need for professional technical knowledge.

[0051] Embodiment 2:

[0052] In a possible implementation of the present application, if the upper limit of the compensation range is exceeded, a filter cleaning alarm is performed based on a preset alarm method.

[0053] It is understandable that the cleanliness of the filter is crucial to the accuracy of infrared temperature measurement during the use of cooking utensils. However, due to the influence of factors such as oil smoke and steam in the cooking environment, the filter is easily contaminated. When the degree of contamination of the filter exceeds a certain limit, it will seriously affect the temperature measurement accuracy and even cause the temperature measurement to fail.

[0054] In one embodiment, when the system detects that the degree of contamination of the optical filter exceeds the compensation range, a cleaning alarm signal will be issued through the control panel of the cooking utensil or the connected mobile device application. The alarm mode can be in various forms such as sound prompts, flashing lights, and text message push to ensure that the user can receive the alarm information in time. For example, when the method of this embodiment is applied in an electric rice cooker, if the optical filter accumulates a large amount of grease due to long-term use, resulting in a decrease in temperature measurement accuracy, the system will automatically trigger an alarm mechanism. After the user hears the alarm or sees the alarm prompt on the control panel, the optical filter can be removed in time for cleaning or replacement.

[0055] The embodiment of the present application can extend the service life of the infrared temperature measuring device and reduce the risk of equipment damage caused by contamination by promptly reminding the user to clean the filter. In addition, it can also effectively avoid the problem of reduced temperature measurement accuracy caused by filter contamination, and ensure the accuracy of temperature control during cooking.

[0056] Embodiment three:

[0057] In a possible implementation of the present application, after the cooking appliance is started for the first time, the radiation data of the food surface measured by the infrared temperature measuring device is determined to be standard radiation data.

[0058] In a possible implementation of the present application, the infrared temperature measurement device further includes: an infrared temperature measurement control board, and the infrared temperature measurement control board is used to store standard radiation data.

[0059] It should be noted that after the cooking appliance is started for the first time, an initial radiation data measurement will be carried out. The radiation data measured this time will be regarded as standard radiation data. It is based on the infrared radiation measurement of the surface of specific ingredients when the cooking appliance is in a new and clean state. This standard radiation data will serve as the basis for subsequent radiation data compensation.

[0060] In one embodiment, when the cooking utensil is first started and ready for cooking, its infrared temperature measuring device will measure the surface of the food to be cooked and obtain an initial radiation data value. Since the cooking utensil and the infrared temperature measuring device are both in the best state at this time, and the filter has not been contaminated, this radiation data value can be regarded as the standard radiation data of the cooking utensil under this kind of food. Furthermore, the infrared temperature measurement control board equipped in the infrared temperature measuring device is not only responsible for processing the infrared temperature measurement data, but also undertakes the task of storing this standard radiation data. By storing the standard radiation data in the control board, the cooking utensil can call this reference value at any time during the subsequent use process, so as to compare and compensate with the currently measured radiation data. In actual operation, whenever the cooking utensil is started, the infrared temperature measuring device will measure the current radiation data of the food surface again and compare it with the standard radiation data stored in the control board. If there is a difference between the two, the temperature measurement compensation coefficient will be calculated according to the degree of difference, and then the current radiation data will be compensated to ensure the accuracy of infrared temperature measurement.

[0061] This embodiment provides a reliable benchmark for subsequent radiation data compensation by determining the standard radiation data when the work is started for the first time. This method can provide an accurate temperature measurement reference point throughout the service life of the cooking appliance, thereby greatly improving the accuracy and stability of infrared temperature measurement. In addition, storing the standard radiation data in the infrared temperature measurement control board also facilitates the call and management of data, making the entire temperature measurement compensation process more efficient and automated.

[0062] For example, suppose a new type of cooking utensil is used for the first time, and the infrared radiation of the surface of the rice to be cooked is measured, and the standard radiation data obtained is 0.9. In the subsequent use process, due to slight contamination of the filter or other factors, the currently measured radiation data may deviate, such as decreasing to 0.85. At this time, the infrared temperature measurement control board of the cooking utensil will automatically call the stored standard radiation data 0.9 and compare it with the current radiation data 0.85. According to the difference between the two, a temperature measurement compensation coefficient is calculated, and this coefficient is applied to compensate the current radiation data, thereby ensuring the accuracy of infrared temperature measurement. In this way, even if the filter is contaminated to a certain extent, the cooking utensil can still accurately measure the temperature of the surface of the food, providing precise temperature control for the cooking process.

[0063] Embodiment 4:

[0064] In a possible implementation of the present application, the actual temperature of the food surface is calculated based on the compensated radiation data, which is expressed by the following formula:

[0065] P=ηε0·σ·T 4

[0066]

[0067] Among them, P is the radiation heat emitted by the food surface per unit time, η is the compensation radiation data, ε0 is the standard radiation data, σ is the Stefan-Boltzmann constant, T is the absolute temperature of the object surface, ε T Current radiation data.

[0068] It should be noted that, based on the above principles, the algorithm logic is implemented as follows: it is assumed that the filter is uncontaminated when the user uses it for the first time, and the radiation data of the rice and water in the inner pot under normal working conditions for the first use is recorded and stored as the standard radiation data ε0. Among them, the infrared radiation data of water at room temperature is close to 1, and 1 means that its own temperature can be converted into 100% radiation. Although infrared rays have a certain ability to penetrate water, their wavelength is longer than visible light, which limits their propagation in water to a certain extent, and water molecules have a certain absorption and scattering ability for infrared energy. Therefore, the radiation data of rice or other foods below the liquid surface is not considered here. The impact of the standard radiation data. In subsequent use, re-measure the current radiation data ε after each startup. T , and then compare it with the standard radiation data to get the radiation coefficient Then substitute the radiation coefficient η into the temperature calculation formula to obtain the temperature value measured after calibration.

[0069] Embodiment five:

[0070] In a possible implementation of the present application, the cooking appliance is an electric rice cooker, which includes a heating device; the cooking stages of the electric rice cooker include a water absorption stage, a heating stage, a boiling stage, a temperature-increasing stage and a rice stewing stage; in the heating stage and / or boiling stage, an infrared temperature measuring device obtains heating power information of the heating device, and matches a temperature measurement compensation coefficient of the cooking stage based on the heating power information; based on the temperature measurement compensation coefficient of the cooking stage, the radiation data of the cooking stage is compensated.

[0071] In a possible implementation of the present application, the infrared temperature measurement control board is also used to receive heating power information transmitted by the heating device through a preset serial port.

[0072] It is understandable that different amounts of water vapor in the medium will affect the transmittance of infrared radiation transmission, and the greater the water vapor content, the greater the absorption of infrared radiation. The rice cooker cooking process mainly includes the water absorption stage, the heating stage, the boiling stage, the temperature-injection stage and the rice stewing stage, among which the heating stage and the boiling stage have higher requirements for the top temperature measurement accuracy. Due to the different degrees of water heating in the two stages, the amount of water vapor generated is also different, which leads to poor consistency of the same calibration accuracy in different cooking stages. To address this problem, the accuracy can be adjusted secondary in combination with the corresponding power, and the different heating gear information of each cooking stage can be transmitted to the infrared temperature measurement control board through serial communication. When there is less water vapor before the water in the pot boils, a secondary calibration is performed using a preset lower accuracy with the initially measured radiation coefficient. When there is more water vapor after the water in the pot boils, a secondary calibration is performed using a preset higher accuracy with the initially measured radiation coefficient, so as to improve the consistency of the top temperature measurement accuracy during the entire cooking process.

[0073] Figure 2 This is a temperature measurement accuracy calibration flow chart provided by the present application. The infrared temperature measurement accuracy automatic calibration method of the cooking appliance in the above embodiment of the present application is as follows: Figure 2 shown.

[0074] In some embodiments of the present application, reference Figure 3 A cooking utensil is also proposed, comprising a pot body, a pot cover and a control module, wherein the pot cover is provided with a metal inner cover, the pot body is provided with a heating device, and the control module is provided with a processor, characterized in that it also comprises an infrared temperature measuring device, the infrared temperature measuring device is provided on the pot cover, the metal inner cover is provided with an infrared perforation corresponding to the infrared temperature measuring device, a filter is provided on the infrared perforation, the control module is electrically connected to the infrared temperature measuring device, a computer program that can be run on the processor is stored in the processor, and when the processor executes the program, the steps in any one of the methods are implemented

[0075] Those skilled in the art know that, in one embodiment, the heating device may be an electromagnetic heating coil, which heats the inner pot through the alternating magnetic field generated by the electromagnetic heating coil. In another embodiment, the heating device may be a heating plate, which generates heat by energizing an internal heating tube, and then conducts the heat to the rice in the inner pot through heat conduction.

[0076] refer to Figure 4 , showing a structural diagram of an embodiment of the electric rice cooker disclosed in the present application; the rice cooker includes a cooker body 10, a cooker cover 20, a heat-insulating inner cover 101, an inner pot 30 for cooking rice, a heating device 105, and a fan 40. The cooker body 10 is provided with a accommodating cavity 106, the inner pot 30 is placed in the accommodating cavity 106 and located on the heating device 105, and the cooker cover 20 is buckled to close the accommodating cavity 106 and the inner pot 30 to form a cooking cavity 301.

[0077] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0078] Each embodiment in this application is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the IoT device and medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0079] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0080] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0081] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0082] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1A step that specifies a function in one or more boxes.

[0083] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0084] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0085] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0086] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0087] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A method for automatically calibrating the infrared temperature measurement accuracy of a cooking utensil, wherein the cooking utensil comprises an infrared temperature measurement device, wherein the infrared temperature measurement device comprises a filter, wherein: The method comprises: After the cooking appliance starts working, measuring the current radiation data of the infrared temperature measuring device on the surface of the food; Comparing the pre-stored standard radiation data with the current radiation data to determine a temperature measurement compensation coefficient, and determining whether the degree of contamination of the filter exceeds an upper limit of a compensation range based on the temperature measurement compensation coefficient; If the upper limit of the compensation range is not exceeded, the current radiation data is compensated based on the temperature measurement compensation coefficient, so as to calculate the actual temperature of the surface of the food based on the compensated radiation data.

2. The method for automatic calibration of infrared temperature measurement accuracy of a cooking appliance according to claim 1, characterized in that: The method further comprises: If the upper limit of the compensation range is exceeded, a filter cleaning alarm is issued based on a preset alarm method.

3. The method for automatic calibration of infrared temperature measurement accuracy of a cooking appliance according to claim 1, characterized in that: The method further comprises: Before the cooking appliance is used, the upper limit of the compensation range is set based on the sensitivity parameter in the specification attributes of the infrared temperature measuring device.

4. The method for automatic calibration of infrared temperature measurement accuracy of a cooking appliance according to claim 1, characterized in that: The upper limit of the compensation range is between 1.2 and 1.

5.

5. The method for automatic calibration of infrared temperature measurement accuracy of a cooking appliance according to claim 1, characterized in that: The method further comprises: After the cooking appliance is started for the first time, the radiation data of the infrared temperature measuring device on the surface of the food material measured is determined as standard radiation data.

6. According to the method for automatic calibration of infrared temperature measurement accuracy of a cooking appliance as claimed in claim 5, the infrared temperature measurement device further comprises: The infrared temperature measurement control board is characterized in that the infrared temperature measurement control board is used to store the standard radiation data.

7. The method for automatic calibration of infrared temperature measurement accuracy of a cooking appliance according to claim 1, characterized in that: The radiation data is the emissivity. Based on the compensated emissivity, the actual temperature of the surface of the food is calculated, which is expressed by the following formula: P=ηε0·σ·T 4 Where P is the radiant heat emitted per unit time by the food surface, η is the compensated emissivity, ε0 ​​is the standard emissivity, σ is the Stefan-Boltzmann constant, T is the absolute temperature of the object surface, ε T Current emissivity.

8. The method for automatic calibration of infrared temperature measurement accuracy of a cooking appliance according to claim 6, characterized in that: The cooking utensil is an electric rice cooker, which comprises a heating device; the cooking stages of the electric rice cooker include a water absorption stage, a temperature rise stage, a boiling stage, a temperature flushing stage and a rice stewing stage; In the heating stage and / or boiling stage, the infrared temperature measuring device obtains the heating power information of the heating device, and matches the temperature measurement compensation coefficient of the cooking stage based on the heating power information; Based on the cooking stage temperature measurement compensation coefficient, the cooking stage radiation data is compensated.

9. The method for automatic calibration of infrared temperature measurement accuracy of a cooking appliance according to claim 8, characterized in that: The infrared temperature measurement control board is also used to receive the heating power information transmitted by the heating device through a preset serial port.

10. A cooking appliance, comprising a pot body, a pot cover and a control module, wherein the pot cover is provided with a metal inner cover, the pot body is provided with a heating device, and the control module is provided with a processor, characterized in that: The invention also includes an infrared temperature measuring device, which is arranged on the pot cover, and the metal inner cover is provided with an infrared perforation corresponding to the infrared temperature measuring device, and a filter is arranged on the infrared perforation, and the control module is electrically connected to the infrared temperature measuring device. The processor stores a computer program that can be run on the processor, and when the processor executes the program, the method described in any one of claims 1 to 9 is implemented.

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