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CN-121977237-A - Intelligent range hood control method, intelligent range hood control device and intelligent range hood

CN121977237ACN 121977237 ACN121977237 ACN 121977237ACN-121977237-A

Abstract

The application relates to an intelligent range hood control method, an intelligent range hood control device and an intelligent range hood, wherein the method comprises the steps of driving a first interdigital transducer to emit a first acoustic surface wave to a second interdigital transducer, and obtaining a first acoustic wave signal corresponding to the first acoustic surface wave emitted by the first interdigital transducer and a second acoustic wave signal corresponding to a second acoustic surface wave received by the second interdigital transducer; the intelligent range hood comprises a first interdigital transducer, a second interdigital transducer, a characteristic difference calculation module, a gesture characteristic obtaining module and a gesture control module, wherein the first interdigital transducer and the second interdigital transducer are embedded in the inner side of a panel of the intelligent range hood, the characteristic difference between a first sound wave signal and a second sound wave signal is calculated, the characteristic difference comprises a phase difference and/or a frequency shift, the gesture characteristic is obtained according to the characteristic difference and the duration time of the second sound wave signal, and the running state of the intelligent range hood is adjusted according to a gesture corresponding to a characteristic template under the condition that the gesture characteristic is judged to be matched with a corresponding gesture characteristic threshold value in the characteristic template. By adopting the method, the problem of low gesture recognition sensitivity of the intelligent range hood can be solved.

Inventors

  • HE LIBO

Assignees

  • 宁波方太厨具有限公司

Dates

Publication Date
20260505
Application Date
20260108

Claims (10)

  1. 1. The intelligent range hood control method is characterized by comprising the following steps: Driving a first interdigital transducer to emit a first surface acoustic wave to a second interdigital transducer, and acquiring a first sound wave signal corresponding to the first surface acoustic wave emitted by the first interdigital transducer and a second sound wave signal corresponding to a second surface acoustic wave received by the second interdigital transducer; Calculating a characteristic difference between the first acoustic signal and the second acoustic signal, the characteristic difference comprising a phase difference and/or a frequency shift; Obtaining gesture characteristics according to the characteristic differences and the duration time of the second acoustic signal; And under the condition that the gesture features are matched with the gesture feature threshold values corresponding to the feature templates, adjusting the running state of the intelligent range hood according to the gestures corresponding to the feature templates.
  2. 2. The method of claim 1, wherein deriving gesture features from the feature differences and the duration of the second acoustic signal comprises: Obtaining gesture waving time according to the duration time; Under the condition that the characteristic difference comprises the phase difference, obtaining the displacement variation of the gesture according to the phase difference and the wavelength of the first sound wave signal; and under the condition that the characteristic difference comprises the frequency shift, obtaining gesture speed according to the frequency shift and sound speed corresponding to the intelligent range hood panel.
  3. 3. The method of claim 1, wherein, in the event that the gesture feature is determined to match a corresponding gesture feature threshold in a feature template, before adjusting the operating state of the intelligent range hood according to the gesture corresponding to the feature template, the method further comprises: comparing the signal voltage of the second acoustic signal with a threshold voltage; And judging whether the gesture feature is matched with a corresponding gesture feature threshold in the feature template or not under the condition that the signal voltage is larger than or equal to the threshold voltage.
  4. 4. A method according to claim 3, wherein prior to calculating the difference in characteristics between the first acoustic signal and the second acoustic signal, the method further comprises: Driving the first interdigital transducer to send a third acoustic surface wave to the second interdigital transducer, and acquiring a third acoustic wave signal generated by the second interdigital transducer according to the received acoustic surface wave; Acquiring a preset signal amplitude of the third sound wave signal; Obtaining an oil stain attenuation coefficient according to the amplitude difference between the signal amplitude of the third sound wave signal and the preset signal amplitude; and adjusting the threshold voltage according to the oil stain attenuation coefficient.
  5. 5. The method of claim 4, wherein after obtaining the oil stain attenuation coefficient from the amplitude difference between the signal amplitude of the third acoustic wave signal and the preset signal amplitude, the method further comprises: and under the condition that the oil stain attenuation coefficient is larger than a preset attenuation coefficient, generating preset cleaning information.
  6. 6. The method of claim 1, wherein after determining that the gesture feature matches a corresponding gesture feature threshold in a feature template, the method further comprises: obtaining a preset frequency according to the human body perception intensity; obtaining the duration time and the target times of ultrasonic wave transmission according to the gestures corresponding to the characteristic templates; driving a first interdigital transducer to emit ultrasonic waves of the preset frequency for the target times within the duration.
  7. 7. The method of claim 6, wherein driving the first interdigital transducer to emit ultrasonic waves of the preset frequency for the target number of times for the duration of time comprises: obtaining preset sound wave intensity of the first sound wave signal according to a preset distance, wherein the preset distance is obtained based on the distance between a palm and the intelligent range hood panel when a gesture is applied; Obtaining an air absorption coefficient according to the preset frequency of the first sound wave signal; Calculating to obtain driving power according to human body-perceived radiation pressure, sound velocity of the first sound wave signal, preset sound wave intensity, air absorption coefficient and array area of the first interdigital transducer; And driving the first interdigital transducer to emit ultrasonic waves with the preset frequency for the target times based on the driving power in the duration time.
  8. 8. The method according to claim 1, wherein the method further comprises: and generating preset abnormal information under the condition that the times of continuously judging that the gesture features are not matched with the feature templates of the preset gestures reach the preset times.
  9. 9. An intelligent range hood control device, the device comprising: the intelligent range hood comprises a driving module, a first interdigital transducer, a second interdigital transducer, a first sound wave signal and a second sound wave signal, wherein the driving module is used for driving the first interdigital transducer to emit a first sound surface wave to the second interdigital transducer and acquiring a first sound wave signal corresponding to the first sound surface wave emitted by the first interdigital transducer and a second sound wave signal corresponding to the second sound surface wave received by the second interdigital transducer; A calculation module for calculating a characteristic difference between the first acoustic signal and the second acoustic signal, the characteristic difference comprising a phase difference and/or a frequency shift; the conversion module is used for obtaining gesture characteristics according to the characteristic difference and the duration time of the second sound wave signal; and the adjusting module is used for adjusting the running state of the intelligent range hood according to the gesture corresponding to the characteristic template under the condition that the gesture characteristic is judged to be matched with the corresponding gesture characteristic threshold in the characteristic template.
  10. 10. A smart range hood, characterized in that a first interdigital transducer and a second interdigital transducer are embedded inside a panel of the smart range hood, the smart range hood being adapted to perform the steps of the method of any one of claims 1 to 8.

Description

Intelligent range hood control method, intelligent range hood control device and intelligent range hood Technical Field The application relates to the field of intelligent range hood control, in particular to an intelligent range hood control method, an intelligent range hood control device and an intelligent range hood. Background The range hood is a common electrical appliance for exhausting and sucking oil smoke in a kitchen. With the improvement of life quality of people, more and more traditional life modes are gradually changed, and the use of household appliances is gradually closed to an intelligent direction. The range hood has more convenient and fast functions for users, and meanwhile, the range hood has more diversified functions. In the related range hood products, touch and gesture double-interaction design is adopted, but because the panel is easy to accumulate greasy dirt, a user is more inclined to switch on and off in a non-contact mode such as waving hands, so as to avoid touching the dirty surface. However, in the gesture interaction process, the sensing distance of the traditional gesture recognition is limited, and the problem of low sensitivity exists in the recognition process. In addition, the range hood is in an oil stain environment for a long time, and gesture recognition sensitivity is further reduced under the influence of oil stains. Aiming at the problem of low gesture recognition sensitivity of the intelligent range hood in the related technology, no effective solution is proposed at present. Disclosure of Invention Accordingly, it is necessary to provide a control method for intelligent range hood, a control device for intelligent range hood and intelligent range hood capable of solving the problem of low gesture recognition sensitivity of intelligent range hood. In a first aspect, in this embodiment, there is provided a control method of an intelligent range hood, including: Driving a first interdigital transducer to emit a first surface acoustic wave to a second interdigital transducer, and acquiring a first sound wave signal corresponding to the first surface acoustic wave emitted by the first interdigital transducer and a second sound wave signal corresponding to a second surface acoustic wave received by the second interdigital transducer; Calculating a characteristic difference between the first acoustic signal and the second acoustic signal, the characteristic difference comprising a phase difference and/or a frequency shift; Obtaining gesture characteristics according to the characteristic differences and the duration time of the second acoustic signal; And under the condition that the gesture features are matched with the gesture feature threshold values corresponding to the feature templates, adjusting the running state of the intelligent range hood according to the gestures corresponding to the feature templates. In some of these embodiments, deriving gesture features from the feature differences and the duration of the second acoustic signal includes: Obtaining gesture waving time according to the duration time; Under the condition that the characteristic difference comprises the phase difference, obtaining the displacement variation of the gesture according to the phase difference and the wavelength of the first sound wave signal; and under the condition that the characteristic difference comprises the frequency shift, obtaining gesture speed according to the frequency shift and sound speed corresponding to the intelligent range hood panel. In some embodiments, before the operation state of the intelligent range hood is adjusted according to the gesture corresponding to the feature template if the gesture feature is judged to be matched with the corresponding gesture feature threshold in the feature template, the method further includes: comparing the signal voltage of the second acoustic signal with a threshold voltage; And judging whether the gesture feature is matched with a corresponding gesture feature threshold in the feature template or not under the condition that the signal voltage is larger than or equal to the threshold voltage. In some of these embodiments, prior to calculating the characteristic difference between the first acoustic signal and the second acoustic signal, the method further comprises: Driving the first interdigital transducer to send a third acoustic surface wave to the second interdigital transducer, and acquiring a third acoustic wave signal generated by the second interdigital transducer according to the received acoustic surface wave; Acquiring a preset signal amplitude of the third sound wave signal; Obtaining an oil stain attenuation coefficient according to the amplitude difference between the signal amplitude of the third sound wave signal and the preset signal amplitude; and adjusting the threshold voltage according to the oil stain attenuation coefficient. In some of these embodiments, after obtaining the oil stain attenua