A kind of active noise reduction control method based on smoke stove linkage, range hood, electronic equipment and storage medium

Abstract

The application provides a kind of active noise reduction control method based on smoke stove linkage, range hood, electronic equipment and storage medium, belong to range hood technical field, wherein method includes obtaining the firepower grade signal of the stove;According to the corresponding relationship between the preset stove grade and the noise reduction parameter, determine the noise reduction parameter corresponding to the firepower grade signal;According to the noise reduction parameter, control the active noise reduction module to emit reverse sound wave.The application makes the reverse sound wave can match with the noise under different grades, realizes the accurate adaptation of noise reduction parameter and dynamic noise.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and in particular to an active noise reduction control method based on the linkage between the range hood and the cooktop, a range hood, electronic equipment, and a storage medium. Background Technology

[0002] As people's living standards continue to improve, the impact of kitchen environment quality on living comfort is receiving increasing attention. In the kitchen environment, range hoods, as the core smoke exhaust equipment, have been widely used in various types of residences. Through a fan system, they capture and exhaust cooking fumes, water vapor, and harmful gases outdoors, playing a vital role in improving kitchen air quality and protecting human health.

[0003] However, range hoods inevitably generate significant aerodynamic and mechanical vibration noise during operation. As users' demands for powerful suction and other performance characteristics continue to increase, fan speeds are rising, leading to intensified aerodynamic noise. This often results in noise levels reaching 60 decibels or even higher, severely impacting the cooking experience and posing a potential threat to the hearing and mental health of those exposed to this environment for extended periods. Therefore, effectively suppressing operating noise of range hoods while maintaining good smoke extraction efficiency has become a crucial issue that urgently needs to be addressed in this field.

[0004] Currently, technical solutions for noise control of range hoods are mainly divided into two categories: passive noise reduction and active noise reduction. Passive noise reduction methods include adding sound-absorbing materials to the inner wall of the duct, optimizing the duct structure design, and adopting vibration-damping structures. These solutions have a certain suppression effect on mid-to-high frequency noise, but their noise reduction effect has obvious performance bottlenecks due to duct space and cost constraints, and they are difficult to effectively deal with broadband, low-frequency aerodynamic noise. Active noise reduction technology uses the principle of sound wave interference to achieve noise cancellation, and theoretically can achieve better noise reduction effects for specific frequency components. However, the control strategies of existing active noise reduction solutions are generally relatively simple, usually only outputting a constant noise reduction signal, failing to fully consider the dynamic changes of noise sources during cooking. In fact, kitchen noise not only comes from the operation of the range hood's fan itself, but is also closely related to the stove's heat intensity, the type of cookware, and the stir-frying state of the ingredients. For example, cooking noise is often loud during stir-frying, while environmental noise is significantly reduced during slow simmering. Existing technologies lack effective perception and linkage response to the aforementioned dynamic noise sources, which often leads to insufficient or excessive noise reduction in active noise cancellation systems in actual use scenarios, resulting in a significant gap between the noise reduction effect and user expectations. Summary of the Invention

[0005] In view of this, the present invention provides an active noise reduction control method based on the linkage between the range hood and the stove, a range hood, an electronic device and a storage medium, aiming to solve the problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An active noise reduction control method based on the linkage between the range hood and cooktop, wherein the range hood and cooktop include a cooktop and a range hood, and the range hood includes an active noise reduction module, the method comprising the following steps: S1. Obtain the firepower level signal of the stove; S2. Determine the noise reduction parameters corresponding to the firepower level signal based on the preset correspondence between the stove level and the noise reduction parameters; S3. Based on the noise reduction parameters, control the active noise reduction module to emit a reverse sound wave.

[0007] Optionally, the step of obtaining the firepower level signal of the stove specifically includes the following steps: The power level signal is obtained by detecting the rotation angle of the stove's power adjustment lever; or, The power level signal is obtained by detecting the temperature of the burner area of ​​the stove.

[0008] Optionally, the noise reduction parameters include at least one of the following parameters: The amplitude parameter is used to control the amplitude of the reverse sound wave; Frequency band parameters are used to control the effective frequency band of the reverse acoustic wave.

[0009] Optionally, the correspondence between the preset stove settings and noise reduction parameters is as follows: When the firepower level signal is at level one, the amplitude parameter in the noise reduction parameters is the first amplitude parameter; When the firepower level signal is level two, the amplitude parameter in the noise reduction parameters is the second amplitude parameter; When the firepower level signal is level three, the amplitude parameter in the noise reduction parameters is the third amplitude parameter; The third level is higher than the second level, the second level is higher than the first level, the third amplitude parameter is greater than the second amplitude parameter, and the second amplitude parameter is greater than the first amplitude parameter.

[0010] Optionally, the correspondence between the preset stove settings and noise reduction parameters is as follows: When the firepower level signal is at level one, the frequency band parameter in the noise reduction parameters is the first frequency band parameter; When the firepower level signal is level two, the frequency band parameter in the noise reduction parameters is the second frequency band parameter; When the firepower level signal is level three, the frequency band parameter in the noise reduction parameters is the third frequency band parameter; The lower limit frequency of the third frequency band parameter is lower than the lower limit frequency of the second frequency band parameter, and the upper limit frequency of the third frequency band parameter is higher than the upper limit frequency of the second frequency band parameter; the lower limit frequency of the second frequency band parameter is lower than the lower limit frequency of the first frequency band parameter, and the upper limit frequency of the second frequency band parameter is higher than the upper limit frequency of the first frequency band parameter.

[0011] Optionally, after the step of controlling the active noise cancellation module to emit a reverse sound wave according to the noise reduction parameters, the method further includes the following steps: Acquire residual noise signal; Determine whether the amplitude of the residual noise signal is greater than a preset threshold; If so, the noise reduction parameters are adjusted according to the preset amount, and the active noise reduction module is controlled to emit a reverse sound wave with the adjusted noise reduction parameters. The process is iterated until the amplitude of the residual noise signal is less than or equal to the preset threshold. The correspondence is updated based on the noise reduction parameters after iterative convergence.

[0012] In addition, to achieve the above objectives, the present invention also provides a range hood, the range hood including an active noise reduction module, the active noise reduction module including a speaker, the speaker being used to emit noise reduction waves to cancel noise, and the range hood applying the active noise reduction control method based on the linkage between the range hood and the stove as described in any of the preceding claims.

[0013] In addition, to achieve the above objectives, the present invention also provides an electronic device, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, it implements the active noise reduction control method based on the linkage between the range hood and the stove as described in any of the preceding claims.

[0014] In addition, to achieve the above objectives, the present invention also provides a storage medium containing computer-executable instructions, characterized in that the computer-executable instructions, when executed by a computer processor, are used to execute any of the aforementioned active noise reduction control methods based on the linkage between the range hood and the stove.

[0015] The beneficial effects of the present invention include at least the following: In this embodiment, the firepower level signal of the stove is obtained in step S1, the noise reduction parameters are determined according to the preset correspondence in step S2, and the active noise reduction module is controlled to emit reverse sound waves according to the noise reduction parameters, so that the reverse sound waves can match the noise under different levels, thus realizing the precise adaptation of noise reduction parameters and dynamic noise. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0017] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0018] Figure 1 This is a flowchart illustrating an active noise reduction control method based on the linkage between the range hood and the stove, as described in an embodiment of this application. Figure 2 This is a flowchart illustrating an active noise reduction control method based on the linkage between the range hood and the stove, as described in an embodiment of this application. Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0021] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0022] Example 1: This embodiment discloses an active noise reduction control method based on the linkage between the range hood and the stove. This method dynamically adjusts the noise reduction parameters of the active noise reduction module (ANC) by acquiring the stove's firepower level signal in real time, so as to achieve an adaptive active noise reduction effect that is synchronized with the cooking firepower.

[0023] The following is a detailed description of an active noise reduction control method based on the linkage between the range hood and the stove, as disclosed in this embodiment. Figure 1 As shown, Figure 1This is a flowchart illustrating an active noise reduction control method based on cooktop-stove linkage described in this embodiment. The cooktop-stove system adapted in this embodiment includes at least a cooktop and a range hood, wherein the range hood is equipped with ANC (Active Noise Cancellation). The active noise reduction control method based on cooktop-stove linkage in this embodiment includes the following steps S1-S3: Step S1: Obtain the firepower level signal of the stove.

[0024] In this embodiment, the stove refers to the equipment used for cooking, including but not limited to gas stoves, induction cooktops, ceramic cooktops, and the stove part of integrated stoves. When the stove is working, its firepower not only determines the heat intensity and amount of oil fumes generated during cooking, but also affects the overall sound pressure level and spectrum distribution characteristics of cooking noise.

[0025] The power level signal refers to a signal that characterizes the current heating intensity or firepower of a stove. The specific form of the power level signal varies depending on the type of stove. For example, for gas stoves, the power level corresponds to the opening state of the gas valve, while for induction cooktops, it corresponds to the power output level of the induction coil. The power level signal can be a discrete signal indicating the power level, such as numerical designations like "Level 1," "Level 2," "Level 3," or "Low," "Medium," and "High"; or it can be a continuous physical quantity signal, such as voltage, resistance, angle, or temperature values. When the power level signal is continuous, it reflects the continuous change in firepower between levels, providing more refined firepower information than discrete signals.

[0026] In this embodiment, step S1 is used to obtain the current firepower level signal of the stove, which serves as the pre-control input for determining subsequent noise reduction parameters.

[0027] In a preferred embodiment, the power level signal of the stove is obtained by detecting the rotation angle of the stove's power adjustment lever.

[0028] The flame control lever mentioned here refers to the operating component on the stove that the user can manually rotate to adjust the flame level. For example, in a gas stove, the flame control lever is usually mechanically linked to the valve core of the gas valve. When the user rotates the flame control lever, the valve core rotates accordingly, thereby controlling the gas flow and adjusting the flame level. The rotation angle here refers to the angle value of the flame control lever relative to its initial position. There is a one-to-one positive correlation between the rotation angle of the flame control lever and the flame level of the stove: as the rotation angle gradually increases from zero, the flame level gradually increases; when the rotation angle reaches its maximum stroke, the flame level reaches its maximum. In this embodiment, the current flame level information of the stove is indirectly obtained by detecting the rotation angle of the flame control lever.

[0029] In one specific embodiment, an angle detection device is provided at the stove's flame control lever. This angle detection device converts the mechanical rotation angle of the flame control lever into an electrical signal. Specifically, the angle detection device can be implemented using any sensor available in the prior art, which will not be elaborated upon here. The electrical signal output by the angle detection device is processed and transmitted to the range hood's control module. The control module, based on a preset angle-level mapping relationship, converts the current rotation angle into a corresponding flame level signal, thereby obtaining the stove's flame level signal.

[0030] In another preferred embodiment, the firepower level signal of the stove is obtained by detecting the temperature of the burner area of ​​the stove.

[0031] The burner described here refers to the heat-generating component of a stove. For example, in a gas stove, the burner refers to the area where the burner holes are located, where gas burns to form a flame. During stove operation, there is a clear physical relationship between the temperature of the burner area and the stove's heat output: the higher the heat output, the higher the temperature of the burner area; conversely, the lower the heat output, the lower the temperature. This embodiment indirectly obtains the current heat output level by detecting the temperature of the burner area.

[0032] In one specific embodiment, a temperature detection device is provided in the burner area of ​​the stove. The temperature detection device converts the temperature of the burner area into an electrical signal. The temperature detection device can be implemented using any type of sensor available in the prior art, which will not be elaborated upon here. The temperature signal output by the temperature detection device is processed and transmitted to the control module of the range hood. The control module, based on a preset temperature-level mapping relationship, converts the current temperature value into the corresponding power level signal, thereby obtaining the power level signal of the stove.

[0033] Understandably, either of the above preferred methods can be used depending on the specific configuration of the cooktop, or they can be set up simultaneously as backups or for mutual verification. Neither method relies on the cooktop's output communication protocol signal, offering strong compatibility and allowing direct application to cooktops of different types and brands.

[0034] In this embodiment, the stove and the range hood can transmit the firepower level signal via wireless communication methods such as Zigbee, Bluetooth, Wi-Fi or infrared, or via wired communication methods through a direct signal line connection.

[0035] Step S2: Determine the noise reduction parameters corresponding to the firepower level signal based on the preset correspondence between the stove level and the noise reduction parameters.

[0036] In this step, the range hood uses the power level signal obtained in step S1 to query the preset correspondence between the stove power level and the noise reduction parameters, and determines the noise reduction parameters that match the power level signal.

[0037] In this embodiment, the correspondence between the cooktop power level and the noise reduction parameters is pre-set and stored in the range hood. This correspondence can be expressed as a lookup table, where power level F1 corresponds to noise reduction parameter N1, power level F2 corresponds to noise reduction parameter N2, power level F3 corresponds to noise reduction parameter N3, and so on. It can also be expressed as a function, for example, by fitting a mathematical relationship between the power level and the noise reduction parameters. This correspondence can be established during the product design or manufacturing stage by experimentally measuring the noise spectrum characteristics at each power level and then writing the optimal noise reduction parameters for each level into the range hood's memory. The range hood determines the noise reduction parameters corresponding to the current power level through this correspondence, eliminating the need for complex real-time noise analysis and algorithm iteration. This results in a fast response speed, low computational overhead, and suitability for the real-time control requirements of embedded systems.

[0038] The noise reduction parameters mentioned here refer to a set of adjustable parameters used to control the operating state of the ANC, which specifically determine the acoustic characteristics of the reverse sound wave emitted by the ANC. In a preferred embodiment, the noise reduction parameters include at least one of amplitude parameters and frequency band parameters. The amplitude parameter controls the amplitude of the reverse sound wave; a larger amplitude parameter results in a higher sound pressure level and stronger noise cancellation capability; a smaller amplitude parameter results in a lower sound pressure level and weaker noise reduction. In specific implementations, the amplitude parameter can be expressed as a gain coefficient (e.g., dimensionless gain values ​​such as 0.5, 1.0, 1.5, etc.) or directly as the voltage amplitude of the driving signal (e.g., 1V, 2V, 3V, etc.). For ease of digital signal processing, the amplitude parameter can also be expressed as a gain value in decibels (dB). By setting the amplitude parameter, the output intensity of the ANC can be matched with the noise energy at different power levels: at low power levels, a low-amplitude reverse sound wave is output to avoid excessive noise reduction and power waste; at high power levels, a high-amplitude reverse sound wave is output to ensure effective cancellation of high-intensity noise, thus achieving dynamic adaptation between noise reduction intensity and noise level.

[0039] Frequency band parameters control the effective frequency band of the reverse acoustic wave. These parameters determine the effective range of the reverse acoustic wave output by the ANC in the frequency domain; that is, the ANC only outputs effective reverse acoustic waves within a specified frequency range. Frequency components outside this range will not be output as noise-reducing waves or will have their noise reduction effect attenuated. In specific implementations, the frequency band parameters can be represented as a set of lower and upper frequency limits (e.g., 200Hz–1500Hz), a combination of center frequency and bandwidth, or an array of filter coefficients. By setting different frequency band parameters, the ANC can accurately reduce noise at different power levels for the main noise frequency components, avoiding wasting noise reduction energy on frequencies where the noise itself is weak, thereby improving noise reduction efficiency.

[0040] Understandably, when amplitude and frequency band parameters are configured together, ANC can simultaneously match the noise characteristics of the current power level in both the frequency and energy domains: the frequency band parameters ensure accurate noise reduction range, and the amplitude parameters ensure sufficient noise reduction strength. The two work together to achieve efficient utilization of noise reduction energy and global optimization of noise reduction effect.

[0041] In a preferred embodiment, in the preset correspondence between the stove setting and the noise reduction parameter, the amplitude parameter increases as the firepower setting increases.

[0042] In practical applications, cooking noise energy increases several times when the cooktop is switched from a low to a high setting. If the ANC outputs a reverse sound wave with a fixed amplitude, at the low setting, the fixed high amplitude reverse sound wave will cause excessive noise reduction, resulting in unnecessary power consumption waste and potentially introducing new auditory discomfort due to the excessively high sound pressure level of the reverse sound wave. At the high setting, the fixed low amplitude reverse sound wave cannot effectively cancel out high-intensity noise, leading to severely insufficient noise reduction, significant noise leakage, and a significant decline in the user's auditory experience. Furthermore, when the heat level changes frequently, the fixed amplitude parameter cannot adjust synchronously with changes in noise energy, resulting in a continuous mismatch between the noise reduction effect and actual needs.

[0043] To address the aforementioned issues, in this embodiment, the stove's firepower levels are arranged from low to high as follows: Level 1, Level 2, and Level 3. Level 1 corresponds to low heat, where the flame is small and combustion is stable. Cooking noise primarily originates from the range hood's fan, resulting in a low overall noise level. Level 2 corresponds to medium heat, where the flame increases, and combustion and fume noise intensify, resulting in a moderate overall noise level. Level 3 corresponds to high heat, where the flame burns intensely, and the noise from stir-frying food combined with the high-volume fan noise results in the highest overall noise level. In other words, for flame size, Level 3 is higher than Level 2, and Level 2 is higher than Level 1.

[0044] Correspondingly, the amplitude parameters in the noise reduction parameters are set as follows: Level 1 corresponds to the first amplitude parameter A1, Level 2 corresponds to the second amplitude parameter A2, and Level 3 corresponds to the third amplitude parameter A3. In this embodiment, Level 3 has the highest power and the greatest cooking noise, requiring the strongest reverse sound wave to effectively cancel it out; therefore, the third amplitude parameter is set to be greater than the second amplitude parameter. Level 2 has moderate power and moderate cooking noise, requiring a moderate intensity reverse sound wave; therefore, the second amplitude parameter is set to be greater than the first amplitude parameter. That is, the amplitude parameters satisfy: A3>A2>A1. This mapping relationship ensures that the output intensity of the ANC matches the noise energy at different levels. At low power, the noise reduction is moderate, avoiding excessive noise reduction that leads to wasted power consumption and potential acoustic discomfort; at high power, the noise reduction is sufficient, effectively suppressing high-intensity noise.

[0045] As another preferred embodiment, in the preset correspondence between the stove setting and the noise reduction parameters, the frequency band parameter widens as the firepower setting increases.

[0046] In practical applications, the noise spectrum characteristics differ significantly at different power levels: at low power levels, noise energy is mainly concentrated in a narrow mid-to-low frequency band, primarily consisting of fan rotation noise and stable burner combustion noise; as the power level increases, the low-frequency components generated by combustion oscillations significantly strengthen, while the mid-to-high frequency components generated by food explosions and high-temperature oil fume also increase sharply, resulting in a significantly wider noise spectrum coverage. Under high-heat stir-frying conditions, the cooking noise spectrum can cover everything from low-frequency rumbling at tens of hertz to high-frequency explosions at thousands of hertz, exhibiting typical broadband characteristics. If the ANC outputs reverse sound waves within a fixed frequency range, at low power levels, frequency components in the fixed frequency band that exceed the actual noise energy distribution range will still output ineffective reverse sound waves, causing unnecessary power consumption waste and even introducing new high-frequency noise interference; at high power levels, the fixed frequency band cannot cover the significantly broadened actual noise spectrum, leading to a significant decrease in noise reduction effect.

[0047] To address the aforementioned issues, this embodiment sets the frequency band parameters in the noise reduction parameters as follows: Level 1 corresponds to the first frequency band parameter, Level 2 corresponds to the second frequency band parameter, and Level 3 corresponds to the third frequency band parameter. The first frequency band parameter corresponds to a relatively narrow frequency band range (e.g., 200Hz–1500Hz), while the second frequency band parameter corresponds to a wider range than the first frequency band range (e.g., 150Hz–2500Hz), additionally covering the enhanced combustion noise and mid-frequency airflow noise under medium heat. The third frequency band parameter corresponds to an even wider range (e.g., 50Hz–4000Hz), fully covering the broadband noise components from low-frequency booming to high-frequency bursting under high-heat stir-frying conditions.

[0048] That is, the frequency band parameters satisfy the following conditions: the lower limit frequency of the third frequency band parameter is lower than the lower limit frequency of the second frequency band parameter, and the upper limit frequency of the third frequency band parameter is higher than the upper limit frequency of the second frequency band parameter; the lower limit frequency of the second frequency band parameter is lower than the lower limit frequency of the first frequency band parameter, and the upper limit frequency of the second frequency band parameter is higher than the upper limit frequency of the first frequency band parameter. In other words, the width of the third frequency band range is greater than the width of the second frequency band range, and the width of the second frequency band range is greater than the width of the first frequency band range.

[0049] It should be understood that the above-mentioned division into first, second, and third power levels is merely illustrative. In actual applications, the number of power levels on a stove may be two, four, five, or more, or it may be a continuously adjustable mode. Those skilled in the art can, based on the core concept of this invention, set corresponding power level divisions and corresponding noise reduction parameter mapping relationships for different models of stoves, all of which fall within the protection scope of this invention.

[0050] In step S2, after acquiring the current power level signal, the noise reduction parameters corresponding to the power level signal are determined through the correspondence between the stove power level and the noise reduction parameters. The entire process does not require waiting for the acquisition and analysis of noise signals, therefore the response delay is extremely low, and the noise reduction parameters can be updated synchronously with changes in power level.

[0051] Step S3: Control the active noise reduction module to emit a reverse sound wave according to the noise reduction parameters.

[0052] In this step, the ANC is controlled to emit a reverse acoustic wave according to the noise reduction parameters determined in step S2. In a specific embodiment, a corresponding reverse acoustic wave driving signal is first generated and output to the ANC. Then, the ANC emits a reverse acoustic wave with the opposite phase to the current noise to cancel out the original noise.

[0053] An ANC (Anodic Cancellation) is a device that generates a sound wave with the opposite phase to the target noise to achieve noise cancellation. The reverse sound wave refers to a sound wave with a phase difference of 180° from the current noise sound wave.

[0054] In one specific embodiment, the generation mechanism of the reverse acoustic wave is as follows: Based on a preset reference signal model, original waveform data with the same frequency, amplitude, and opposite phase as the target noise is generated. According to the noise reduction parameters determined in step S2, the original waveform data is adjusted as follows: When the noise reduction parameters include an amplitude parameter, the amplitude of the original waveform data is multiplied by the amplitude parameter. For example, when the amplitude parameter is 1.0, the waveform amplitude remains unchanged; when the amplitude parameter is 1.5, the waveform amplitude is amplified to 1.5 times the original waveform, the sound pressure level of the reverse sound wave is correspondingly increased, and the noise reduction intensity is increased; when the amplitude parameter is 0.5, the waveform amplitude is reduced to 0.5 times the original waveform, and the noise reduction intensity is weakened.

[0055] When the noise reduction parameters include frequency band parameters, a bandpass filter is configured according to the lower and upper frequency limits in the frequency band parameters. This allows frequency components within the specified frequency band to pass through, while attenuating or filtering out frequency components outside the specified frequency band. For example, when the frequency band parameters are set to 200Hz–1500Hz, the bandpass filter only allows frequency components between 200Hz and 1500Hz to pass through, attenuating components below 200Hz and above 1500Hz, thus ensuring that the reverse acoustic wave is effective only within this frequency band. The amplitude-adjusted and frequency-shaped reverse acoustic wave digital signal is converted into an analog audio signal by a digital-to-analog converter.

[0056] As a result of this step, the reverse sound wave is superimposed on the original noise generated by the stove combustion and the range hood operation in space. Through the sound wave interference effect, it partially or completely cancels out the original noise, thereby reducing the environmental noise level ultimately perceived by the user.

[0057] The beneficial effects of this embodiment include at least the following aspects: (1) Fast noise reduction response. Existing feedback-based active noise reduction schemes require first acquiring noise signals and then analyzing them through algorithms to output reverse sound waves, which results in a delay. In this embodiment, step S1 directly acquires the stove's firepower level signal, and step S2 quickly determines the corresponding noise reduction parameters through the correspondence between the firepower level and the noise reduction parameters. The entire process does not require waiting for the acquisition and analysis of noise signals, and the response delay is shortened to the microsecond level, achieving synchronous matching between noise reduction commands and firepower changes.

[0058] (2) High noise reduction accuracy. Existing technologies lack effective perception of dynamic noise sources and can usually only output a constant noise reduction signal. In this embodiment, step S2 determines the noise reduction parameters according to a preset correspondence, wherein the amplitude parameter increases with the increase of the firepower level, and the frequency band parameter widens with the increase of the firepower level, so that the output intensity and effective frequency band of the reverse sound wave can match the noise energy level and spectrum distribution under different firepower levels, thereby achieving precise adaptation of noise reduction parameters to dynamic noise.

[0059] Example 2: This embodiment is a further description of the aforementioned Embodiment 1.

[0060] refer to Figure 2 The active noise reduction control method based on the linkage between the range hood and the stove described in this embodiment further includes the following steps after the step of controlling the active noise reduction module to emit reverse sound waves according to the noise reduction parameters: Acquire residual noise signal; Determine whether the amplitude of the residual noise signal is greater than a preset threshold; If so, the noise reduction parameters are adjusted according to the preset amount, and the active noise reduction module is controlled to emit a reverse sound wave with the adjusted noise reduction parameters. The process is iterated until the amplitude of the residual noise signal is less than or equal to the preset threshold. The correspondence is updated based on the noise reduction parameters after iterative convergence.

[0061] In this embodiment, the residual noise signal is first acquired. In one specific embodiment, an error microphone is installed on the range hood to collect the residual noise signal after the inverted sound wave and the original noise are superimposed. Unlike ordinary microphones, the error microphone is configured to effectively pick up residual noise signals near the user's ear or in the cooking area. Here, residual noise refers to the remaining noise components that have not been canceled out after the inverted sound wave and the original noise are superimposed. Ideally, when the amplitude of the inverted sound wave is equal to that of the original noise and the phase difference is 180°, the two completely cancel each other out, and the residual noise is zero. However, in practical applications, it is difficult for the inverted sound wave to precisely match the original noise at all times, and a certain amount of residual noise is inevitable. The amplitude and spectral characteristics of this residual noise reflect the degree of deviation between the current noise reduction parameters and the actual noise. The larger the residual noise amplitude, the lower the matching degree between the current noise reduction parameters and the current noise; the smaller the residual noise amplitude, the higher the matching degree.

[0062] After acquiring the residual noise signal, it is analyzed to calculate its amplitude (such as root mean square value, peak value, or sound pressure level), and this amplitude is compared with a preset threshold. The preset threshold here refers to a pre-defined upper limit for the residual noise amplitude, and its value is related to the target noise reduction depth. In actual product design, this threshold can be set comprehensively based on product positioning, user auditory comfort requirements, and ANC hardware performance.

[0063] When the amplitude of the residual noise signal exceeds the preset threshold, it indicates that the current noise reduction parameters have failed to effectively cancel the original noise, and the noise reduction effect is not as expected, requiring correction of the noise reduction parameters. In this case, the noise reduction parameters are adjusted according to a preset amount: When the residual noise is characterized by high overall energy, the amplitude parameter is gradually increased according to a preset step size, so that the sound pressure level of the reverse sound wave is increased one after another until the residual noise amplitude drops below the preset threshold. When the residual noise is characterized by a prominent frequency component, the frequency band parameters (lower limit frequency and / or upper limit frequency) are adjusted according to a preset step size to shift or broaden the effective frequency band of the reverse sound wave toward that frequency component until the residual amplitude of that frequency component drops below a preset threshold.

[0064] The preset values ​​here refer to the step size of a single iteration. The preset value for the amplitude parameter can be a fixed step size (e.g., increasing the gain by 0.1 times each time) or a variable step size (e.g., the larger the step size, the greater the deviation of the residual noise amplitude). The preset value for the frequency band parameter can be a fixed step size (e.g., extending by 50Hz each time) or an adaptive step size related to the spectral characteristics of the residual noise.

[0065] After each adjustment of the noise reduction parameters, the ANC is controlled to re-emit the reverse sound wave with the adjusted noise reduction parameters, and the new residual noise signal is collected again through the error microphone for comparison until the amplitude of the residual noise signal is less than or equal to the preset threshold. At this time, it is determined that the noise reduction parameters have converged to the optimal value that matches the current noise state.

[0066] Finally, the noise reduction parameters that have finally converged through iteration are associated with the current power level signal, and the correspondence between the stove power level and the noise reduction parameters stored in the range hood is updated.

[0067] Specifically, the update can be performed in one of the following ways: (1) Direct replacement method: When the iteration convergence is completed for the first time under the same firepower level, the noise reduction parameter corresponding to the level in the correspondence is directly replaced with the noise reduction parameter after the iteration convergence.

[0068] (2) Weighted average method: When multiple iterations of convergence have been completed under the same firepower level, the noise reduction parameters after iteration convergence are recorded as historical data, and the noise reduction parameters in the corresponding relationship are smoothly updated using the weighted average method. For example, let the currently stored noise reduction parameters be N. old The noise reduction parameters after convergence in this iteration are N. new Then the updated noise reduction parameter N updated =α N old +(1-α) N new , where α is the historical weight coefficient (e.g., 0.7–0.9). This method can effectively avoid the excessive influence of a single abnormal iteration result on the correspondence, ensuring the stable convergence of the correspondence in long-term use.

[0069] (3) Conditional update method: The corresponding relationship is updated only when the number of iterations is less than the preset number (e.g., 5 times) and convergence is achieved; if multiple iterations are required to converge, it is judged as a temporary disturbance (e.g., the user suddenly changes the cooking method) and the corresponding relationship is not updated to avoid polluting the already trained corresponding relationship data.

[0070] Through the above-mentioned update mechanism, the correspondence can continuously learn and adapt to the actual acoustic characteristics of a specific cooktop-range hood combination and the user's personal cooking habits during use, thereby achieving personalized noise reduction parameter configuration.

[0071] Example 3: This embodiment provides a range hood, including a fan, an active noise reduction module, a control module, and a human-computer interaction module.

[0072] The fan has multiple speed settings, which are the adjustable speed settings of the range hood. These settings can be adjusted manually by the user or automatically by the range hood based on the concentration of cooking fumes. For example, the user can manually control the settings via touch or buttons on the human-machine interface module. This part is existing technology and will not be elaborated upon in this embodiment.

[0073] The active noise cancellation module includes a speaker and a processor. The speaker is preferably installed away from areas directly exposed to high-temperature cooking fumes to ensure its lifespan and noise reduction performance. Simultaneously, the speaker's sound-emitting surface is preferably positioned towards the user's cooking area to place the user in the optimal noise-reducing listening position; for example, it can be installed on the control panel area corresponding to the fume hood of a range hood. The speaker emits noise-reducing waves to cancel out cooking noise, and the processor drives the speaker to emit these waves to effectively cancel out the noise.

[0074] The control module is the main control unit of the range hood, and it is electrically connected to the fan, active noise reduction module, and human-machine interaction module. The main function of the control module is to receive instructions from the human-machine interaction module, control the fan speed, and drive the active noise reduction module to output noise reduction waves with corresponding noise reduction intensity according to the noise reduction parameters.

[0075] The human-computer interaction module is used to allow users to operate and control the range hood and / or obtain the operating status information of the range hood.

[0076] As a preferred embodiment, the range hood described herein also includes a noise acquisition module, which is used to collect noise during cooking so that the active noise reduction module can generate a noise reduction wave that matches the noise.

[0077] The range hood in this embodiment uses the active noise reduction control method of the range hood and stove linkage described in any of the foregoing embodiments, and has the beneficial effects of the active noise reduction control method of the range hood and stove linkage described in any of the foregoing embodiments, which will not be repeated here.

[0078] Example 4: This invention also provides an electronic device for running the above-described active noise reduction control method based on the linkage between the range hood and the stove; see also Figure 3 The diagram shows the structure of an electronic device, which includes a memory 100 and a processor 101. The memory 100 is used to store one or more computer instructions, which are executed by the processor 101 to realize the above-mentioned active noise reduction control method based on the linkage between the range hood and the stove.

[0079] Furthermore, Figure 3 The electronic device shown also includes a bus 102 and a communication interface 103, with the processor 101, the communication interface 103 and the memory 100 connected via the bus 102.

[0080] The memory 100 may include high-speed random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 103 (which can be wired or wireless), such as the Internet, wide area network, local area network, or metropolitan area network. The bus 102 may be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 3 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus or one type of bus.

[0081] Processor 101 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of processor 101 or by instructions in software form. Processor 101 can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this invention can be directly manifested as execution by a hardware decoding processor, or execution by a combination of hardware and software modules in the decoding processor. The software module can reside in a readily available storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory 100, and processor 101 reads information from memory 100 and, in conjunction with its hardware, completes the steps of the method described in the foregoing embodiments.

[0082] Example 5: According to embodiments of the present invention, a computer-readable storage medium is provided, comprising various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. The computer-readable storage medium stores computer-executable instructions, which, when executed by a computer processor, execute the active noise reduction control method based on the linkage between the range hood and stove as described in any of the foregoing embodiments.

[0083] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general-purpose hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; under the concept of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An active noise reduction control method based on the linkage between the range hood and the stove, characterized in that, The cooktop includes a cooker and a range hood, the range hood includes an active noise reduction module, and the method includes the following steps: S1. Obtain the firepower level signal of the stove; S2. Determine the noise reduction parameters corresponding to the firepower level signal based on the preset correspondence between the stove level and the noise reduction parameters; S3. Based on the noise reduction parameters, control the active noise reduction module to emit a reverse sound wave.

2. The active noise reduction control method based on the linkage between the range hood and the stove as described in claim 1, characterized in that, The step of obtaining the firepower level signal of the stove specifically includes the following steps: The power level signal is obtained by detecting the rotation angle of the stove's power adjustment lever; or, The power level signal is obtained by detecting the temperature of the burner area of ​​the stove.

3. The active noise reduction control method based on the linkage between the range hood and the stove as described in claim 1, characterized in that, The noise reduction parameters include at least one of the following parameters: The amplitude parameter is used to control the amplitude of the reverse sound wave; Frequency band parameters are used to control the effective frequency band of the reverse acoustic wave.

4. The active noise reduction control method based on the linkage between the range hood and the stove as described in claim 3, characterized in that, The preset correspondence between the stove settings and the noise reduction parameters is as follows: When the firepower level signal is at level one, the amplitude parameter in the noise reduction parameters is the first amplitude parameter; When the firepower level signal is level two, the amplitude parameter in the noise reduction parameters is the second amplitude parameter; When the firepower level signal is level three, the amplitude parameter in the noise reduction parameters is the third amplitude parameter; The third level is higher than the second level, the second level is higher than the first level, the third amplitude parameter is greater than the second amplitude parameter, and the second amplitude parameter is greater than the first amplitude parameter.

5. The active noise reduction control method based on the linkage between the range hood and the stove as described in claim 4, characterized in that, The preset correspondence between the stove settings and the noise reduction parameters is as follows: When the firepower level signal is at level one, the frequency band parameter in the noise reduction parameters is the first frequency band parameter; When the firepower level signal is level two, the frequency band parameter in the noise reduction parameters is the second frequency band parameter; When the firepower level signal is level three, the frequency band parameter in the noise reduction parameters is the third frequency band parameter; The lower limit frequency of the third frequency band parameter is lower than the lower limit frequency of the second frequency band parameter, and the upper limit frequency of the third frequency band parameter is higher than the upper limit frequency of the second frequency band parameter; the lower limit frequency of the second frequency band parameter is lower than the lower limit frequency of the first frequency band parameter, and the upper limit frequency of the second frequency band parameter is higher than the upper limit frequency of the first frequency band parameter.

6. The active noise reduction control method based on the linkage between the range hood and the stove as described in claim 1, characterized in that, Following the step of controlling the active noise cancellation module to emit reverse sound waves according to the noise reduction parameters, the method further includes the following steps: Acquire residual noise signal; Determine whether the amplitude of the residual noise signal is greater than a preset threshold; If so, the noise reduction parameters are adjusted according to the preset amount, and the active noise reduction module is controlled to emit a reverse sound wave with the adjusted noise reduction parameters. The process is iterated until the amplitude of the residual noise signal is less than or equal to the preset threshold. The correspondence is updated based on the noise reduction parameters after iterative convergence.

7. A range hood, characterized in that, The range hood includes an active noise reduction module, which includes a speaker. The speaker is used to emit noise reduction waves to cancel out noise. The range hood applies the active noise reduction control method based on the linkage between the range hood and the stove as described in any one of claims 1-6.

8. The range hood as described in claim 7, characterized in that, The range hood also includes a noise acquisition module, which is used to collect noise.

9. An electronic device, characterized in that, It includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, it implements the active noise reduction control method based on the linkage between the range hood and the stove as described in any one of claims 1-6.

10. A storage medium containing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, are used to perform the active noise reduction control method based on the linkage between the range hood and the stove as described in any one of claims 1-6.

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