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CN-122015146-A - Control method and device of intelligent range hood, storage medium and intelligent range hood

CN122015146ACN 122015146 ACN122015146 ACN 122015146ACN-122015146-A

Abstract

The application relates to a control method, a device, a storage medium and an intelligent range hood, which are used for acquiring vibration sound signals through a microphone array on the intelligent range hood, performing multi-source vibration separation processing on the vibration sound signals based on a pre-stored separation matrix to obtain thermovibration signals generated when an LED lamp is started, performing spectrum analysis on the thermovibration signals, performing attenuation compensation on the LED lamp based on the result of the spectrum analysis, and performing timely self-adaptive compensation on the light attenuation condition of the LED lamp in the range hood working process so as to provide better cooking illumination experience.

Inventors

  • HE LIBO

Assignees

  • 宁波方太厨具有限公司

Dates

Publication Date
20260512
Application Date
20260112

Claims (10)

  1. 1. The control method of the intelligent range hood is characterized by comprising the following steps: the method comprises the steps of acquiring a vibration sound signal, wherein the vibration sound signal is acquired by a microphone array on the intelligent range hood; performing multi-source vibration separation processing on the vibration sound signals based on a pre-stored separation matrix to obtain thermovibration signals generated when the LED lamp is started; and performing spectrum analysis on the thermovibration signal, and performing attenuation compensation on the LED lamp based on the result of the spectrum analysis.
  2. 2. The control method of the intelligent range hood according to claim 1, wherein the spectrum analysis is performed on the thermovibration signal, the attenuation compensation is performed on the LED lamp based on the result of the spectrum analysis, comprising: Performing spectrum analysis on the thermovibration signal to obtain a main formant frequency; calculating to obtain a frequency offset based on the main formant frequency and the calibration frequency corresponding to the LED lamp; and performing attenuation compensation on the LED lamp based on the frequency offset.
  3. 3. The control method of the intelligent range hood according to claim 2, wherein performing spectrum analysis on the thermovibration signal to obtain a main formant frequency comprises: Based on a Welch overlapping piecewise averaging method, calculating the thermovibration signal to obtain a corresponding power spectral density function; determining a maximum spectral line position based on the power spectral density function, wherein the maximum spectral line position is a frequency point corresponding to the maximum power; And correcting the maximum spectral line position based on a secondary interpolation method, and determining a final peak position to obtain a corresponding main formant frequency.
  4. 4. The control method of the intelligent range hood according to claim 2, wherein the attenuation compensation of the LED lamp based on the frequency offset comprises: If the frequency offset is larger than a preset attenuation threshold, acquiring preset compensation gain, maximum allowable offset and original driving current; calculating a compensation coefficient based on the compensation gain, the maximum allowable offset, and the frequency offset; and compensating the original driving current based on the compensation coefficient to obtain a new driving current.
  5. 5. The control method of the intelligent range hood according to claim 1, further comprising: performing multi-source vibration separation processing on the vibration sound signals based on a pre-stored separation matrix, and extracting to obtain mechanical vibration signals, wherein the mechanical vibration signals are generated by motor vibration of the intelligent range hood; Carrying out frequency spectrum analysis on the mechanical vibration signal to obtain peak frequency and corresponding time domain amplitude in a target frequency band, wherein the target frequency band is set based on theoretical frequency conversion of the motor; Calculating the current acceleration of the motor based on the peak frequency and the corresponding time domain amplitude in the target frequency band; based on the current acceleration, a health status of the motor is assessed.
  6. 6. The control method of the intelligent range hood according to claim 5, wherein estimating the health state of the motor based on the current acceleration includes: If the current acceleration is larger than a first acceleration threshold value, triggering an alarm strategy, wherein the alarm strategy comprises the steps of reducing the gear of the fan and generating maintenance reminding information; if the current acceleration is smaller than or equal to a first acceleration threshold value, judging whether the current acceleration is larger than a second acceleration threshold value or not; If the current acceleration is larger than a second acceleration threshold value, triggering an early warning strategy, wherein the early warning strategy comprises generating maintenance prompt information; And if the current acceleration is smaller than or equal to a second acceleration threshold value, confirming that the acceleration is normal.
  7. 7. A control device of an intelligent range hood, the device comprising: the system comprises a signal acquisition module, a control module and a control module, wherein the signal acquisition module is used for acquiring a vibration sound signal, the vibration sound signal is acquired by a microphone array on the intelligent range hood, and an LED lamp on the intelligent range hood is in an on state; the component analysis module is used for carrying out multi-source vibration separation processing on the vibration sound signals based on a pre-stored separation matrix to obtain thermovibration signals generated when the LED lamp is started; and the attenuation compensation module is used for carrying out spectrum analysis on the thermovibration signal and carrying out attenuation compensation on the LED lamp based on the result of the spectrum analysis.
  8. 8. The intelligent range hood is characterized by comprising a lamp assembly, a fan module and a control module, wherein the lamp assembly comprises an LED lamp and a microphone array; the LED lamp is used for illumination; the microphone array is used for collecting vibration sound signals; The fan module is used for driving the impeller to rotate at a high speed through the motor and sucking gas generated during cooking into the smoke machine; The control module, connected to the LED lamp, microphone array and fan module, is adapted to implement the steps of the method of any one of claims 1 to 6.
  9. 9. The intelligent range hood of claim 8, wherein the microphone array comprises three microphones; the three microphones are arranged in an equilateral triangle, and are arranged opposite to the LED lamps.
  10. 10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any one of claims 1 to 6.

Description

Control method and device of intelligent range hood, storage medium and intelligent range hood Technical Field The application relates to the technical field of range hoods, in particular to a control method and device of an intelligent range hood, a storage medium and the intelligent range hood. Background In the LED lighting application of the range hood, with the extension of the service time, the LED lamp inevitably experiences a light decay phenomenon, i.e. the light-emitting brightness gradually decreases. The light attenuation not only affects the illumination effect of the cooking bench area and reduces the visual comfort of cooking operation, but also can be accompanied by color temperature change to affect the whole light environment of the kitchen. Most range hoods maintain brightness by adopting a preset fixed compensation strategy, but due to the fact that the use frequency, the switching period, the kitchen environment difference and the like of different users are large, the actual aging speeds of LEDs are different, the fixed compensation mode is difficult to accurately match with the actual attenuation condition, insufficient or excessive brightness compensation is easily caused, and the use experience is affected. Aiming at the problem of poor reliability of the compensation effect of the LED lamp of the range hood in the related technology, no effective solution is proposed at present. Disclosure of Invention The embodiment provides a control method and device of an intelligent range hood, a storage medium and the intelligent range hood, so as to solve the problem of poor reliability of the LED lamp compensation effect of the range hood in the related technology. In a first aspect, in this embodiment, a control method of an intelligent range hood is provided, where the method includes: the method comprises the steps of acquiring a vibration sound signal, wherein the vibration sound signal is acquired by a microphone array on the intelligent range hood; performing multi-source vibration separation processing on the vibration sound signals based on a pre-stored separation matrix to obtain thermovibration signals generated when the LED lamp is started; and performing spectrum analysis on the thermovibration signal, and performing attenuation compensation on the LED lamp based on the result of the spectrum analysis. In some of these embodiments, performing a spectral analysis on the thermovibration signal, performing attenuation compensation on the LED lamp based on a result of the spectral analysis, includes: Performing spectrum analysis on the thermovibration signal to obtain a main formant frequency; calculating to obtain a frequency offset based on the main formant frequency and the calibration frequency corresponding to the LED lamp; and performing attenuation compensation on the LED lamp based on the frequency offset. In some of these embodiments, performing a spectral analysis on the thermovibration signal to obtain a dominant formant frequency comprises: Based on a Welch overlapping piecewise averaging method, calculating the thermovibration signal to obtain a corresponding power spectral density function; determining a maximum spectral line position based on the power spectral density function, wherein the maximum spectral line position is a frequency point corresponding to the maximum power; And correcting the maximum spectral line position based on a secondary interpolation method, and determining a final peak position to obtain a corresponding main formant frequency. In some of these embodiments, attenuation compensating the LED lamp based on the frequency offset includes: If the frequency offset is larger than a preset attenuation threshold, acquiring preset compensation gain, maximum allowable offset and original driving current; calculating a compensation coefficient based on the compensation gain, the maximum allowable offset, and the frequency offset; and compensating the original driving current based on the compensation coefficient to obtain a new driving current. In some of these embodiments, the method further comprises: performing multi-source vibration separation processing on the vibration sound signals based on a pre-stored separation matrix, and extracting to obtain mechanical vibration signals, wherein the mechanical vibration signals are generated by motor vibration of the intelligent range hood; Carrying out frequency spectrum analysis on the mechanical vibration signal to obtain peak frequency and corresponding time domain amplitude in a target frequency band, wherein the target frequency band is set based on theoretical frequency conversion of the motor; Calculating the current acceleration of the motor based on the peak frequency and the corresponding time domain amplitude in the target frequency band; based on the current acceleration, a health status of the motor is assessed. In some of these embodiments, estimating the health state of the motor based on the