Steaming oven control method and system based on humidity detection

Abstract

The invention provides a steam oven control method and system based on humidity detection, and belongs to the technical field of steam oven control, and the method comprises the following steps: 1, an operation module obtains a corresponding preset first parameter according to a selected cooking mode; step 2, acquiring a second parameter based on the humidity sensor and inputting the second parameter to the processing module; 3, the processing module calculates and exports an output parameter through a fuzzy logic algorithm based on the input first parameter and the input second parameter; 4, the control unit starts to process a corresponding control instruction based on the output parameters; and step 5, continuously acquiring a second parameter based on the humidity sensor, and continuously calculating and outputting a corresponding control instruction by the processing module and the control unit. The second parameter continuously approaches the first parameter, and the problem that the cooking result is not ideal due to the fact that the humidity of a traditional steaming oven cannot be controlled is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of steam oven control, and more specifically, particularly relates to a steam oven control method and system based on humidity detection. Background Art

[0002] In the field of modern kitchen appliances, the steam oven, as a composite cooking device that combines steaming and baking functions, provides users with a variety of cooking methods and can meet the cooking needs of different ingredients and dishes.

[0003] During the steaming and baking process, different ingredients and cooking methods have different requirements for the humidity in the steam oven. For example, when baking some pastry, a lower humidity environment is required to ensure the crispness of the crust; when steaming steamed buns, dumplings and other pasta, a higher and more stable humidity is required to make the pasta soft. However, most traditional steam ovens use mechanical temperature and time control, which cannot automatically control the humidity during the cooking process, which can easily lead to unsatisfactory cooking results and affect the taste. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a steam oven control method and system based on humidity detection to solve the technical problem in the prior art that traditional steam ovens use mechanical temperature and time control and cannot automatically control humidity during the cooking process, which easily leads to unsatisfactory cooking results and affects the taste.

[0005] The purpose and effect of the steam oven control method and system based on humidity detection of the present invention are achieved by the following specific technical means: A steam oven control method based on humidity detection comprises the following steps: Step 1: The user sets the cooking mode of the steam oven through the operation module, and the operation module can obtain a corresponding preset first parameter according to the cooking mode selected by the user, wherein the first parameter is a humidity threshold, and the corresponding relationship between the cooking mode and the humidity threshold includes that different cooking modes correspond to different humidity thresholds; Step 2: obtaining a second parameter based on a humidity sensor installed in the steaming and baking cavity of the steaming and baking oven, the second parameter being a real-time humidity parameter in the steaming and baking cavity, and converting the second parameter into an electrical signal and inputting the electrical signal into a processing module; Step 3: The processing module calculates and derives output parameters through a fuzzy logic algorithm based on the first parameter and the second parameter input; Step 4: The control unit starts processing corresponding control instructions based on the output parameter, wherein the control instruction includes setting a specific value, wherein the specific value is X=0; and comparing the output parameter with the specific value; If the output parameter is less than the specific value, it indicates that the humidity in the steam-bake cavity is lower than the expected humidity, and the steam-bake oven is operated as follows: the steam generation amount of the steam generating device is increased so that the second parameter approaches the first parameter; If the output parameter is greater than the specific value, it indicates that the humidity in the steam-bake cavity is higher than the expected humidity, and the steam-bake oven is operated as follows: the steam generation amount of the steam generating device is reduced so that the second parameter is close to the first parameter; If the output parameter is equal to the specific value, the steam generating device is made to maintain the current steam generation amount so that the second parameter remains unchanged; Step 5: The second parameter is continuously acquired based on the humidity sensor, and the processing module and the control unit also continuously perform calculations and corresponding control instruction output operations to achieve real-time control of the humidity in the steaming and baking chamber of the steam oven, so that the second parameter during the cooking process approaches the first parameter.

[0006] In a preferred embodiment, in step three, the fuzzy logic algorithm includes fuzzifying the first parameter and the second parameter, and the fuzzifying includes defining fuzzy sets and domains; Assume the fuzzy set of error value h is: , the domain is , It is the maximum error value determined according to the humidity control accuracy and range of the steam oven; Assume that the fuzzy set of the error change rate hc is: , the domain is , The maximum value is set according to the range of humidity change rate; The fuzzy set of the output control variable n is: , the domain is , is the maximum control amount of the steam generating device.

[0007] In a preferred embodiment, the calculation formula of the error value h is: ; Wherein, h represents the error value; represents the first parameter; L represents the second parameter; The calculation formula of the error change rate hc is: ; In the formula, hc represents the error change rate; t represents the unit time during the operation of the steam oven; dt represents a small change in time, which is a time interval approaching zero; dh represents a small change in the error value h, that is, the change value of the error value h within a very small time interval dt; K represents a constant.

[0008] In a preferred embodiment, the fuzzy processing further includes calculating the membership function of the error value h, the error change rate hc and the output control quantity n, and the calculation formula of the error value h membership function is: ; in , , To determine the fuzzy set Parameters of the membership function shape, and ; The calculation formula of the error change rate hc membership function is: ; in, , , To determine the fuzzy set Parameters of the membership function shape, and ; The calculation formula of the output control quantity n membership function is: ; in, , , To determine the fuzzy set Parameters of the membership function shape, and .

[0009] In a preferred embodiment, based on the given error value h and the error change rate hc, the activation intensity is calculated. , and its calculation formula is: ; In the formula, is the error value h in the fuzzy set The membership degree in is the error change rate hc in the fuzzy set The degree of membership in .

[0010] In a preferred embodiment, defuzzification is performed, and the calculation formula is: ; Where Z represents the clarified output parameter, which is used to adjust the steam generating device; represents the activation intensity corresponding to the i-th error fuzzy set and the j-th error change rate fuzzy set; Represents the output of the fuzzy set The degree of membership at the error value h.

[0011] In a preferred embodiment, in step 4, the calculation formula for controlling the steam generating device to increase or decrease the amount of steam generated is: ; Wherein, Z represents the output parameter, Indicates the steam generation amount of the steam generating device; Indicates the real-time steam generation amount of the steam generating device; Represents the proportional coefficient. When the output parameter is less than the specific value, is a positive proportional coefficient; when the output parameter is greater than the specific value, is a negative proportionality factor.

[0012] A steam oven control system based on humidity detection, comprising an operation module, a humidity detection module, a processing module, a control unit and a steam generating device; The operating module is used to operate the oven to select a preset cooking mode and obtain a preset first parameter; The humidity detection module is arranged inside the steam oven, and is used to detect the second parameter inside the steam oven in real time, and transmit the second parameter to the processing module; The processing module is used to receive the second parameter, calculate the second parameter and the preset first parameter through a fuzzy logic algorithm, and derive an output parameter; The control unit starts processing corresponding control instructions based on the output parameter, wherein the control instruction includes setting a specific value, wherein the specific value is X=0; and comparing the output parameter with the specific value; If the output parameter is less than the specific value, it indicates that the humidity in the steam-bake cavity is lower than the expected humidity, and the steam-bake oven is operated as follows: the steam generation amount of the steam generating device is increased so that the second parameter approaches the first parameter; If the output parameter is greater than the specific value, it indicates that the humidity in the steam-bake cavity is higher than the expected humidity, and the steam-bake oven is operated as follows: the steam generation amount of the steam generating device is reduced so that the second parameter is close to the first parameter; If the output parameter is equal to the specific value, the steam generating device is made to maintain the current steam generation amount so that the second parameter remains unchanged; The steam generating device is used to generate steam into the steaming and baking cavity inside the steam oven.

[0013] A computer-readable storage medium stores computer instructions, wherein the computer instructions are used to enable the computer to execute the aforementioned steam oven control method based on humidity detection.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the setting of the processing module, the control unit and the steam generating device, the processing module uses the fuzzy logic algorithm to calculate the humidity threshold (first parameter) and the humidity parameter (second parameter) to obtain the output parameter. The control unit adjusts the steam generating device according to the parameter. When the humidity in the steam oven is lower than the expected humidity (output parameter < specific value), the steam generation is increased; when the humidity is higher than the expected humidity (output parameter > specific value), the steam generation is reduced; when the humidity meets the requirements (output parameter = specific value), the current steam generation is maintained; this real-time humidity control mechanism ensures that the humidity in the steam oven is always maintained at the set level during the entire cooking process, solving the problem that the traditional steam oven is prone to unsatisfactory cooking results due to the inability to control the humidity.

[0015] 2. Through the setting of the humidity sensor and the operation module, after the user selects a cooking mode through the operation module, the operation module can obtain the preset humidity threshold (first parameter) corresponding to the cooking mode, and through the humidity sensor installed in the steam oven, the humidity parameter (second parameter) of the steaming and baking cavity can be obtained in real time, and then calculated and regulated through the processing module, control unit and steam generating device, thereby improving the usability of the steam oven. Users can obtain ideal cooking results without relying on experience for repeated debugging, and can also meet the different requirements of different cooking modes for humidity, thereby improving applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a flow chart of the steps of a steam oven control method based on humidity detection. DETAILED DESCRIPTION

[0017] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with the accompanying drawings and examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0018] Please refer to Figure 1 As shown, the present invention provides a steam oven control method based on humidity detection, which is applicable to an oven and includes the following steps: Step 1: The user sets the cooking mode of the steam oven through the operation module. The corresponding relationship information between various cooking modes and humidity thresholds is stored in the storage medium. When the user selects a cooking mode, the operation module can call the preset first parameter corresponding to the cooking mode from the storage medium. The first parameter here is the humidity threshold. The cooking mode is a diversified working mode set according to the characteristics of different ingredients and cooking needs, such as baking mode, steaming mode and roasting mode. Each cooking mode requires adjustment of humidity according to different stages during the cooking process, and different cooking modes have clear and differentiated requirements for humidity thresholds to ensure the best cooking effect.

[0019] Step 2: A humidity sensor is installed in the steaming and baking chamber of the steam oven. The humidity sensor uses sensing technology to sensitively sense the humidity conditions in the steaming and baking chamber to obtain a second parameter, which is the real-time humidity parameter in the steaming and baking chamber. Subsequently, the humidity sensor converts the acquired humidity information into an electrical signal, which is then input into the processing module to provide a reliable data basis for subsequent calculations and humidity control processes.

[0020] Step 3: The processing module is the core computing unit of the steam oven control system. After receiving the first parameter (humidity threshold) determined by the operation module and the second parameter (humidity parameter) collected and converted by the humidity sensor installed in the steam oven cavity, it will calculate the output parameter based on the input first parameter and second parameter through the fuzzy logic algorithm. The output parameter can reflect the deviation between the current humidity parameter of the steam oven and the humidity threshold and the humidity change trend, thereby providing a basis for the subsequent control unit to issue control instructions.

[0021] Step 4: The control unit, as the command hub of the humidity control of the entire steam oven, starts processing the corresponding control instructions after receiving the output parameters derived by the processing module, wherein the control instructions include setting a specific value, which is set to X=0, and using the specific value as a reference for judging whether the humidity in the steam oven meets the expectation. The control unit compares the output parameter with the specific value for judgment; When the output parameter is less than a specific value, it indicates that the actual humidity parameter in the steam-bake cavity is lower than the preset humidity threshold. At this time, the control unit will issue an instruction to the steam generator to increase the amount of steam generated. After receiving the instruction, the steam generator will increase the amount of steam generated according to its own adjustment mechanism, thereby causing the humidity in the steam-bake cavity to rise, so that the second parameter (humidity parameter) can approach the first parameter (humidity threshold); When the output parameter is greater than a specific value, it indicates that the actual humidity parameter in the steam-bake cavity exceeds a preset humidity threshold. At this time, the control unit will issue an instruction to the steam generator to reduce the amount of steam generated. After receiving the instruction, the steam generator will reduce the amount of steam generated or adjust the steam discharge to reduce the humidity parameter in the steam-bake cavity, so as to make the second parameter approach the first parameter. If the output parameter is exactly equal to a specific value, the control unit will issue a command to the steam generating device to maintain the current steam generation amount unchanged, ensuring that the humidity parameter in the steaming and baking chamber is stable at the current state and remains constant; This real-time humidity control mechanism ensures that the humidity in the steam oven is always maintained at the set level during the entire cooking process by constantly monitoring and adjusting the humidity in the steam oven, solving the problem that traditional steam ovens are prone to unsatisfactory cooking results due to the inability to control humidity.

[0022] Step 5: Based on the humidity sensor installed in the steaming and baking cavity of the steam oven remaining active, the second parameter, that is, the real-time humidity parameter in the steaming and baking cavity is continuously obtained, and the humidity parameter is transmitted to the processing module in real time. After receiving the new humidity data, the processing module calculates it in combination with the first parameter set previously, derives a new output parameter and transmits it to the control unit. The control unit re-evaluates the comparison relationship between the current condition of the humidity in the steaming and baking cavity and the expected humidity threshold, and performs corresponding control instruction output operations, thereby realizing real-time control of the humidity in the steaming and baking cavity of the steam oven, ensuring that the second parameter can approach the first parameter at each stage of the cooking process.

[0023] In step three, the fuzzy logic algorithm used includes fuzzifying the first parameter (humidity threshold) and the second parameter (humidity parameter), and the fuzzifying includes defining fuzzy sets and domains; Assume the fuzzy set of error value h is: , where each fuzzy subset represents a fuzzy description of the degree of error, for example This may indicate that the error is in the extremely negative range. Indicates that the error is in the medium negative range, etc., to form a complete error value fuzzy expression system; the corresponding domain is determined as ,in Indicates the maximum error value determined according to the humidity control accuracy and range of the steam oven; Next, let the fuzzy set of the error change rate hc be: , these fuzzy subsets correspond to different error change rate states, such as It can be that the error change rate is in a rapidly decreasing large negative state, Indicates that the error change rate is in a relatively slowly decreasing medium negative state, etc., in order to fully characterize various possible situations of the error change rate; its domain is set as ,in It indicates the maximum value set according to the range of humidity change rate; it enables the fuzzy description of the error change rate to reflect the dynamic characteristics of humidity changes in the steam oven.

[0024] Finally, let the fuzzy set of the output control variable n be defined as: , these fuzzy subsets are used to represent different degrees of control actions on the steam generating device, such as may represent a control command to drastically reduce steam generation, Indicates instructions to slightly reduce the amount of steam generated, etc., which provides a decision basis for generating appropriate control actions according to different humidity deviation conditions. The corresponding domain is ,in, It indicates the maximum control amount of the steam generating device. It determines the upper and lower limits of the output control amount when regulating the steam generating device, ensuring that the control instructions are within the acceptable and effectively executed range of the steam generating device. The calculation formula of the error value h is: ; In the formula, h represents the error value, which directly reflects the deviation between the real-time humidity in the steam oven and the preset humidity threshold; represents the first parameter, which is the pre-set humidity threshold. This value is determined according to different cooking modes and the ideal humidity environment required by the ingredients. It is the target reference value in the entire humidity control process. L represents the second parameter, which is the humidity parameter in the steaming and baking cavity obtained in real time by the humidity sensor installed in the steaming and baking cavity of the steam oven. It changes continuously with the operation of the steam oven and changes in the internal environment.

[0025] Furthermore, the calculation formula of the error change rate hc is: ; Wherein, hc represents the error change rate, which is used to measure the speed of change of humidity error in the steam oven over time; t represents the unit time during the operation of the steam oven, which provides a quantitative scale standard for the entire time axis, so as to analyze the humidity change in the time dimension; dt represents the small change in time, which is a time interval approaching zero; dh represents the small change in the error value h, that is, the change in the error value h within a very small time interval dt; and K represents a constant, which is introduced mainly based on the possible situations in actual use. For example, as the use time of the steam oven increases, factors such as hardware aging will inevitably lead to errors in the data collection of components such as humidity sensors. The existence of the K value can reduce the impact of such errors caused by factors such as hardware aging on the final calculation results, thereby ensuring that the calculation of the error change rate hc is more accurate and reliable.

[0026] The fuzzy processing also includes calculating the membership function of the error value h, the error change rate hc and the output control quantity n; The calculation formula of the error value h membership function is: ; In the formula, Indicates that the error value h is in the fuzzy set The membership degree in is that h belongs to the fuzzy set the extent of; , , To determine the fuzzy set The parameters of the membership function shape are arrive The value is within the range of and satisfies Constraints; when the error value h is arrive When h is within the interval, the membership function shows an increasing trend, indicating that the error value h gradually approaches a certain fuzzy state; and when h is arrive When it is within the interval of , the membership function shows a decreasing trend, which means that the error value h is gradually moving away from the fuzzy state.

[0027] The calculation formula of the error change rate hc membership function is: ; In the formula, Indicates the error change rate hc in the fuzzy set The degree of membership in is that hc belongs to the fuzzy set the extent of; , , To determine the fuzzy set The parameters of the membership function shape are arrive The value is taken within the domain of The combination of these parameters can shape the membership function form that adapts to various changes in the error change rate hc, such as when the error change rate hc changes from Towards In the process of change, the corresponding fuzzy set The membership in will change according to the rules specified by the membership function. This change can reflect the speed of the error change rate hc and its correlation with each fuzzy state.

[0028] The calculation formula of the membership function of the output control quantity n is: ; In the formula, Indicates that the output control quantity n is in the fuzzy set The membership degree in is n belongs to the fuzzy set the extent of; , , To determine the fuzzy set The parameters of the membership function shape range from arrive between, and The setting of these parameters enables the membership function of the output control quantity n to correspond to different control actions and control intensity ranges of the steam generating device. arrive When the membership function is within the interval of , the change of the membership function reflects the adjustment trend of the control amount of the steam generating unit under the control instruction, which can be the transition from a small control amount to a medium control amount; arrive The range reflects the change process from medium control quantity to large control quantity or in the opposite direction, so as to realize the control of the steam generating device according to different fuzzy reasoning results, and ensure that the humidity in the steam oven can stably approach the preset humidity threshold.

[0029] Based on the given error value h and error change rate hc, calculate the activation strength , and its calculation formula is: ; In the formula, Indicates that the error value h is in the fuzzy set The membership degree in the fuzzy set is determined by presetting the membership function of the error value h. When the error value h is in different value ranges, according to the rules of the membership function, it is The degree of membership in will change accordingly. If the membership function of the error value h adopts the form of a triangular membership function, when the value of h is close to the interval corresponding to the function peak, The value of will approach 1, indicating that the error value h is highly affiliated with the fuzzy subset; and when h deviates from this interval, will gradually decrease according to the shape of the function, reflecting the decrease in its degree of membership; similarly, Indicates the error change rate hc in the fuzzy set The membership in is also determined based on the membership function of the preset error change rate hc; the error change rate hc reflects the dynamic change of humidity error over time in the humidity control process of the steam oven, and its membership function divides multiple fuzzy subsets according to different change rate ranges; when the error change rate hc is in a certain value interval, its membership value in the fuzzy set Bj can be obtained by calculating the membership function; if the error change rate hc increases rapidly, according to the setting of its membership function, its membership value in the corresponding fuzzy subset representing rapid increase will be relatively high, while the membership in other fuzzy subsets representing slow changes or decreases will be lower.

[0030] Defuzzification is used to convert the fuzzy reasoning results into clear output parameters in order to adjust the steam generating device. The calculation formula is: ; Where Z represents the clarified output parameter, which is used to adjust the steam generating device; represents the activation strength corresponding to the i-th error fuzzy set and the j-th error change rate fuzzy set, which determines the degree of activation under the combination of the current error value h and the error change rate hc; Indicates that the error value h is in the fuzzy set The degree of membership in ; Indicates the error change rate hc in the fuzzy set The degree of membership in ; Represents the output fuzzy set The membership degree at the error value h; by calculating the above parameters according to the formula, the clarified output parameter Z is finally obtained, so that the fuzzy humidity control information is converted into accurate steam generating device control instructions to realize the control of the humidity in the steam oven.

[0031] In step 4, the calculation formula for controlling the steam generating device to increase or decrease the steam generation amount is: ; Where Z represents the output parameter; Indicates the steam generation capacity of the steam generating device; Indicates the real-time steam generation of the steam generator. It reflects the actual working output of the steam generator at the current moment and is the basis for calculating the adjustment amount of steam generation. For example, at a certain moment, the steam generator is generating steam at a certain rate. The ongoing steam generation is , then according to the output parameter Z and the proportional coefficient The calculation results, in The amount of steam generated can be dynamically controlled by increasing or decreasing the amount of steam generated. It represents the proportionality coefficient, which plays a role in the formula to convert the output parameter Z into the actual steam generation adjustment amount; when the output parameter Z is less than the specific value X, it means that the humidity in the steam oven is lower than the expected humidity. is a positive proportionality factor, which ensures that in the calculation, the value of Z will positively increase the steam generation , so that the steam generating device increases the steam output, so that the humidity in the steam oven gradually rises to approach the preset humidity threshold; and when the output parameter Z is greater than the specific value X, it indicates that the humidity in the steam oven is higher than the expected humidity. is a negative proportional coefficient, so during the calculation process, the value of Z will negatively reduce the steam generation , prompting the steam generating device to reduce steam output, thereby causing the humidity in the steam oven to gradually decrease, making the second parameter approach the first parameter; ensuring that the steam oven always maintains near the set humidity level during the entire cooking process, providing the best cooking humidity environment for various ingredients.

[0032] A steam oven control system based on humidity detection, comprising an operation module, a humidity detection module, a processing module, a control unit and a steam generating device; An operating module, used for operating the oven to select a preset cooking mode and call a preset first parameter, where the first parameter is a humidity threshold; A humidity detection module includes a humidity sensor installed in the steaming and baking chamber of the steam oven, and can sense the change of humidity in the steaming and baking chamber to obtain a second parameter, that is, a real-time humidity parameter in the steaming and baking chamber; after obtaining the humidity parameter, the humidity sensor will immediately convert it into an electrical signal and transmit it to the processing module; After receiving the second parameter from the humidity detection module, the processing module uses its built-in fuzzy logic algorithm to calculate the second parameter obtained in real time and the preset first parameter obtained by the operation module through the fuzzy logic algorithm, and derives the output parameter; The control unit starts processing corresponding control instructions based on the output parameters provided by the processing module. The control instructions include setting a specific value, where the specific value is X=0. The specific value is used as a reference for judging whether the humidity in the steam oven meets the expectation. The control unit compares the output parameter with the specific value for judgment. The steam generating device can adjust the steam generation amount according to the instructions issued by the control unit to generate steam into the steam-baking cavity inside the steam oven.

[0033] A steam oven control system based on humidity detection is proposed in an embodiment of the present invention. First, a user sets a cooking mode of the steam oven through an operation module. The operation module can obtain a corresponding preset first parameter according to the cooking mode selected by the user, and the first parameter is a humidity threshold value; then, a second parameter is obtained based on a humidity sensor installed in the steaming and baking cavity of the steam oven, and the second parameter is a real-time humidity parameter in the steaming and baking cavity, and the second parameter is input to a processing module; the processing module calculates and derives an output parameter through a fuzzy logic algorithm based on the input first and second parameters; secondly, the control unit starts to process corresponding control instructions based on the output parameters, and the control instructions include setting a specific value, and the specific value is X=0; comparing and judging the output parameter with the specific value; if the output parameter is less than the specific value, it indicates that the humidity in the steaming and baking cavity is lower than the expected humidity, and this The steam oven is operated as follows: the steam generation amount of the steam generating device is increased so that the second parameter approaches the first parameter; if the output parameter is greater than a specific value, it indicates that the humidity in the steam-baking cavity is higher than the expected humidity, and the steam oven is operated as follows: the steam generation amount of the steam generating device is reduced so that the second parameter approaches the first parameter; if the output parameter is equal to the specific value, the steam generating device maintains the current steam generation amount so that the second parameter remains unchanged; finally, the second parameter is continuously acquired based on the humidity sensor, and the processing module and the control unit also continuously perform calculations and corresponding control instruction output operations, so as to realize real-time control of the humidity in the steam-baking cavity of the steam oven, and ensure that the second parameter in the cooking process approaches the first parameter during the entire cooking process, thereby solving the problem that the traditional steam oven is prone to unsatisfactory cooking results due to the inability to control humidity.

[0034] Based on the same inventive concept, an embodiment of the present application further proposes a computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable a computer to execute the aforementioned steam oven control method based on humidity detection.

[0035] As a non-transitory computer-readable storage medium, the memory can be used to store non-transitory software programs, non-transitory computer executable programs and modules. The storage medium stores the correspondence between multiple cooking modes and humidity thresholds, which are selected and called by the operation module, and stores the software program for executing the scheme of the present invention, which is controlled and executed by the processing module and the control unit. The specific implementation method can refer to the above-mentioned method embodiment and will not be repeated here.

[0036] Optionally, the storage medium may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc-read-only memory (CD-ROM) or other optical disc storage, optical disc storage, magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto; the storage medium may be integrated with the operating module, the processing module and the control unit, or may exist independently and be coupled through an interface circuit, and the embodiments of the present invention do not specifically limit this.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A steam oven control method based on humidity detection, characterized in that: The following steps are included: Step 1: The user sets the cooking mode of the steam oven through the operation module, and the operation module can obtain a corresponding preset first parameter according to the cooking mode selected by the user, wherein the first parameter is a humidity threshold, and the corresponding relationship between the cooking mode and the humidity threshold includes that different cooking modes correspond to different humidity thresholds; Step 2: obtaining a second parameter based on a humidity sensor installed in the steaming and baking cavity of the steaming and baking oven, the second parameter being a real-time humidity parameter in the steaming and baking cavity, and converting the second parameter into an electrical signal and inputting the electrical signal into a processing module; Step 3: The processing module calculates and derives output parameters through a fuzzy logic algorithm based on the first parameter and the second parameter input; Step 4: The control unit starts processing corresponding control instructions based on the output parameter, wherein the control instruction includes setting a specific value, wherein the specific value is X=0; and comparing the output parameter with the specific value; If the output parameter is less than the specific value, it indicates that the humidity in the steam-bake cavity is lower than the expected humidity, and the steam-bake oven is operated as follows: the steam generation amount of the steam generating device is increased so that the second parameter approaches the first parameter; If the output parameter is greater than the specific value, it indicates that the humidity in the steam-bake cavity is higher than the expected humidity, and the steam-bake oven is operated as follows: the steam generation amount of the steam generating device is reduced so that the second parameter is close to the first parameter; If the output parameter is equal to the specific value, the steam generating device is made to maintain the current steam generation amount so that the second parameter remains unchanged; Step 5: The second parameter is continuously acquired based on the humidity sensor, and the processing module and the control unit also continuously perform calculations and corresponding control instruction output operations to achieve real-time control of the humidity in the steaming and baking chamber of the steam oven, so that the second parameter during the cooking process approaches the first parameter.

2. A steam oven control method based on humidity detection according to claim 1, characterized in that: In step three, the fuzzy logic algorithm includes fuzzifying the first parameter and the second parameter, and the fuzzifying includes defining fuzzy sets and domains; Assume the fuzzy set of error value h is: , the domain is , It is the maximum error value determined according to the humidity control accuracy and range of the steam oven; Assume that the fuzzy set of the error change rate hc is: , the domain is , The maximum value is set according to the range of humidity change rate; The fuzzy set of the output control variable n is: , the domain is , is the maximum control amount of the steam generating device.

3. The method for controlling a steam oven based on humidity detection according to claim 2, characterized in that: The calculation formula of the error value h is: ； Wherein, h represents the error value; represents the first parameter; L represents the second parameter; The calculation formula of the error change rate hc is: ； In the formula, hc represents the error change rate; t represents the unit time during the operation of the steam oven; dt represents a small change in time, which is a time interval approaching zero; dh represents a small change in the error value h, that is, the change value of the error value h within a very small time interval dt; K represents a constant.

4. The method for controlling a steam oven based on humidity detection according to claim 2, characterized in that: The fuzzy processing also includes calculating the membership function of the error value h, the error change rate hc and the output control quantity n. The calculation formula of the error value h membership function is: ； in, , , To determine the fuzzy set Parameters of the membership function shape, and ; The calculation formula of the error change rate hc membership function is: ； in, , , To determine the fuzzy set Parameters of the membership function shape, and ; The calculation formula of the output control quantity n membership function is: ； in, , , To determine the fuzzy set Parameters of the membership function shape, and .

5. The method for controlling a steam oven based on humidity detection according to claim 4, characterized in that: Based on the given error value h and the error change rate hc, the activation strength is calculated , and its calculation formula is: ； In the formula, is the error value h in the fuzzy set The membership degree in is the error change rate hc in the fuzzy set The degree of membership in .

6. The method for controlling a steam oven based on humidity detection according to claim 5, characterized in that: Defuzzification is performed, and the calculation formula is: ； Where Z represents the clarified output parameter, which is used to adjust the steam generating device; represents the activation intensity corresponding to the i-th error fuzzy set and the j-th error change rate fuzzy set; Represents the output of the fuzzy set The degree of membership at the error value h.

7. The method for controlling a steam oven based on humidity detection according to claim 1, characterized in that: In step 4, the calculation formula for controlling the steam generating device to increase or decrease the steam generation amount is: ； Wherein, Z represents the output parameter, Indicates the steam generation amount of the steam generating device; Indicates the real-time steam generation amount of the steam generating device; Represents the proportional coefficient. When the output parameter is less than the specific value, is a positive proportional coefficient; when the output parameter is greater than the specific value, is a negative proportionality factor.

8. A steam oven control system based on humidity detection, characterized in that: It includes an operation module, a humidity detection module, a processing module, a control unit and a steam generating device; The operating module is used to operate the oven to select a preset cooking mode and obtain a preset first parameter; The humidity detection module is arranged inside the steam oven, and is used to detect the second parameter inside the steam oven in real time, and transmit the second parameter to the processing module; The processing module is used to receive the second parameter, calculate the second parameter and the preset first parameter through a fuzzy logic algorithm, and derive an output parameter; The control unit starts processing corresponding control instructions based on the output parameter, wherein the control instruction includes setting a specific value, wherein the specific value is X=0; and comparing the output parameter with the specific value; If the output parameter is less than the specific value, it indicates that the humidity in the steam-bake cavity is lower than the expected humidity, and the steam-bake oven is operated as follows: the steam generation amount of the steam generating device is increased so that the second parameter approaches the first parameter; If the output parameter is greater than the specific value, it indicates that the humidity in the steam-bake cavity is higher than the expected humidity, and the steam-bake oven is operated as follows: the steam generation amount of the steam generating device is reduced so that the second parameter is close to the first parameter; If the output parameter is equal to the specific value, the steam generating device is made to maintain the current steam generation amount so that the second parameter remains unchanged; The steam generating device is used to generate steam into the steaming and baking cavity inside the steam oven.

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