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CN-121977238-A - Intelligent control method of range hood and intelligent range hood

CN121977238ACN 121977238 ACN121977238 ACN 121977238ACN-121977238-A

Abstract

The application relates to an intelligent control method of a range hood and the intelligent range hood, and relates to the technical field of range hoods, wherein an interference fringe image is obtained, the interference fringe image is formed by scattered light through interference, and the scattered light is formed by the incident light emitted by an LED lamp of the range hood and irradiates oil smoke in the environment; the method comprises the steps of obtaining an interference fringe image, obtaining the wavelength offset of the incident light based on the interference fringe image, calculating the attenuation coefficient of the LED lamp module corresponding to the lamp bead based on the wavelength offset, generating driving current based on the attenuation coefficient to control the luminous intensity of the LED lamp module, converting oil mist particles generated when the range hood operates into a natural optical detection medium, realizing the on-line real-time detection of the attenuation of the LED lamp bead by utilizing the Mie scattering interference principle, and improving the reliability and the accuracy of attenuation compensation.

Inventors

  • HE LIBO

Assignees

  • 宁波方太厨具有限公司

Dates

Publication Date
20260505
Application Date
20260112

Claims (10)

  1. 1. An intelligent control method of a range hood is characterized by comprising the following steps: The method comprises the steps of obtaining an interference fringe image, wherein the interference fringe image is formed by interference of scattered light, and the scattered light is formed by lampblack in an environment irradiated by incident light emitted by a lampblack absorber LED lamp module; Calculating the attenuation coefficient of the corresponding lamp bead of the LED lamp module based on the wavelength offset; and generating a driving current based on the attenuation coefficient to control the luminous intensity of the LED lamp module.
  2. 2. The intelligent control method of a range hood according to claim 1, wherein the LED lamp module comprises single-color beads of two colors; generating a driving current to control the luminous intensity of the LED lamp module based on the attenuation coefficient, comprising: Calculating a new current ratio based on the attenuation coefficient and the initial current ratio corresponding to the two single-color lamp beads, wherein the initial current ratio is the ratio of initial driving currents of the two single-color lamp beads; And adjusting the driving current of the two single-color lamp beads based on the new current ratio so as to control the luminous intensity of the mixed color light of the LED lamp module.
  3. 3. The intelligent control method of a range hood according to claim 1, further comprising: Based on the interference fringe image, calculating to obtain the oil smoke particle size; calculating to obtain the oil smoke concentration based on the oil smoke particle size; Based on the oil smoke concentration, a corresponding air volume control instruction is generated, and the air volume control instruction is used for controlling a fan driving module on the range hood to change air volume.
  4. 4. The intelligent control method of a range hood according to claim 3, wherein the calculation of the oil smoke particle size based on the interference fringe image includes: Calculating interference fringe contrast based on the interference fringe image; and calculating to obtain the oil smoke particle size based on the interference fringe contrast, the wavelength of incident light, the refractive index difference between oil drops and air and the scattering angle, wherein the scattering angle is 90 degrees.
  5. 5. The intelligent control method of a range hood according to claim 3, wherein the calculating the oil smoke concentration based on the oil smoke particle size comprises: Calculating the average brightness of the scattered light based on the interference fringe image; and calculating to obtain the oil smoke concentration based on the oil smoke particle size, the average brightness, the incident light wavelength, the incident light intensity and the calibration coefficient, wherein the calibration coefficient is obtained based on calibration of a standard oil smoke generator.
  6. 6. The intelligent range hood is characterized by comprising a smoke collecting hood, an LED lamp module, a light acquisition module, a fan driving module and a control module, wherein the light acquisition module comprises a grating imaging module and an image sensor; the LED lamp module is arranged on the smoke collecting cover and is used for emitting monochromatic incident light, and the incident light is transmitted by lampblack particles generated by cooking to form scattered light; the grating imaging module is arranged in the irradiation range of the LED lamp module and is used for modulating the scattered light into interference fringes; the image sensor is arranged opposite to the grating imaging module and is used for collecting the optical signals of the interference fringes and generating interference fringe images; The control module, connected to the image sensor, LED lamp module and fan drive module, is configured to perform the steps of the method of any one of claims 1 to 5.
  7. 7. The intelligent range hood according to claim 6, wherein the grating imaging module comprises a grating layer, a transparent substrate and a diffuse reflection layer; the grating layer is arranged on one surface of the transparent substrate, and the diffuse reflection layer is arranged on the other surface of the transparent substrate; the grating layer modulates the incident scattered light into interference fringes, and the diffuse reflection layer irradiates the modulated interference fringe light to the image sensor.
  8. 8. The intelligent range hood according to claim 7, wherein the grating layer is a parallel grating groove with a period of 5 μm, and the diffuse reflection layer is a barium sulfate coating.
  9. 9. The intelligent range hood according to claim 6, further comprising a detection chamber guard plate; The detection cavity protection plate is arranged on the periphery of the grating imaging module and the periphery of the image sensor, has light transmittance, and is provided with a light-transmitting oleophobic coating on the surface.
  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 5.

Description

Intelligent control method of range hood and intelligent range hood Technical Field The application relates to the technical field of range hoods, in particular to an intelligent control method of a range hood and the intelligent range hood. Background In kitchen environment, lampblack absorber LED light is exposed to high temperature, oil smoke and frequent on-off under the adverse condition for a long time, and luminous flux can decay over time, leads to the illuminance to be insufficient, influences performance. Therefore, the LED lamp light attenuation compensation device has important significance for maintaining the luminous quality and prolonging the service life of the lamp. At present, when the range hood leaves the factory, a light attenuation model is built according to specifications and aging test data of the selected LED lamp beads, and a compensation curve is predicted. The user performs brightness compensation based on a fixed compensation curve when using the display device. However, different usage modes and frequencies can affect the attenuation speed and degree of the LED, and a fixed compensation curve is difficult to accurately adapt to the actual decay state of the LED, so that insufficient compensation or excessive compensation is easily caused, and fine control cannot be realized. Aiming at the problem of poor reliability of LED attenuation compensation in the related art, no effective solution is proposed at present. Disclosure of Invention The embodiment provides an intelligent control method of a range hood and the intelligent range hood, so as to solve the problem of poor LED attenuation compensation reliability in the related art. In a first aspect, in this embodiment, an intelligent control method of a range hood is provided, where the method includes: The method comprises the steps of obtaining an interference fringe image, wherein the interference fringe image is formed by interference of scattered light, and the scattered light is formed by lampblack in an environment irradiated by incident light emitted by a lampblack absorber LED lamp module; Calculating the attenuation coefficient of the corresponding lamp bead of the LED lamp module based on the wavelength offset; and generating a driving current based on the attenuation coefficient to control the luminous intensity of the LED lamp module. In some embodiments, the LED lamp module comprises two color single color beads; generating a driving current to control the luminous intensity of the LED lamp module based on the attenuation coefficient, comprising: Calculating a new current ratio based on the attenuation coefficient and the initial current ratio corresponding to the two single-color lamp beads, wherein the initial current ratio is the ratio of initial driving currents of the two single-color lamp beads; And adjusting the driving current of the two single-color lamp beads based on the new current ratio so as to control the luminous intensity of the mixed color light of the LED lamp module. In some of these embodiments, the method further comprises: Based on the interference fringe image, calculating to obtain the oil smoke particle size; calculating to obtain the oil smoke concentration based on the oil smoke particle size; Based on the oil smoke concentration, a corresponding air volume control instruction is generated, and the air volume control instruction is used for controlling a fan driving module on the range hood to change air volume. In some of these embodiments, calculating the soot particle size based on the interference fringe image includes: Calculating interference fringe contrast based on the interference fringe image; and calculating to obtain the oil smoke particle size based on the interference fringe contrast, the wavelength of incident light, the refractive index difference between oil drops and air and the scattering angle, wherein the scattering angle is 90 degrees. In some embodiments, the calculating the soot concentration based on the soot particle size includes: Calculating the average brightness of the scattered light based on the interference fringe image; and calculating to obtain the oil smoke concentration based on the oil smoke particle size, the average brightness, the incident light wavelength, the incident light intensity and the calibration coefficient, wherein the calibration coefficient is obtained based on calibration of a standard oil smoke generator. The intelligent range hood comprises a fume collecting hood, an LED lamp module, a light collecting module, a fan driving module and a control module, wherein the light collecting module comprises a grating imaging module and an image sensor; the LED lamp module is arranged on the smoke collecting cover and is used for emitting monochromatic incident light, and the incident light is transmitted by lampblack particles generated by cooking to form scattered light; the grating imaging module is arranged in the irradiation range of th