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CN-122015147-A - Intelligent control method based on gas thermal plume detection, intelligent range hood and system

CN122015147ACN 122015147 ACN122015147 ACN 122015147ACN-122015147-A

Abstract

The application relates to an intelligent control method, an intelligent range hood and a system based on gas thermal plume detection, which are characterized in that a thermal image sequence is obtained after the intelligent range hood is started, the thermal image sequence is obtained by continuously detecting thermal plumes generated when a gas cooker is burnt, the rising speed of the thermal plumes is calculated by analyzing the movement condition of thermal plaques in the thermal image sequence based on the thermal image sequence, the working gear of the intelligent range hood is regulated based on the rising speed, the problem of poor control reliability of the intelligent range hood in the linkage of the gas cooker is solved, the non-contact monitoring precision and efficiency of the working state of the gas cooker can be improved by detecting the thermal plumes generated by the gas cooker, the oil smoke and waste gas in a kitchen can be timely discharged, the reliability of intelligent control of the intelligent range hood is improved, and better cooking experience is provided for users.

Inventors

  • HE LIBO

Assignees

  • 宁波方太厨具有限公司

Dates

Publication Date
20260512
Application Date
20260202

Claims (10)

  1. 1. An intelligent control method based on gas thermal plume detection is characterized in that the method is applied to an intelligent range hood, and the method comprises the following steps: After the intelligent range hood is started, a thermal image sequence is obtained by continuously detecting thermal plumes generated when a gas stove burns; Dividing the region where the thermal patch is located from the thermal image sequence to obtain a thermal patch block image sequence; analyzing the movement condition of the thermal patch based on the thermal patch image sequence to obtain the rising speed of the thermal plume; And adjusting the working gear of the intelligent range hood based on the rising speed.
  2. 2. The intelligent control method based on gas thermal plume detection according to claim 1, wherein the method for obtaining the thermal patch image sequence by dividing the region where the thermal patch is located from the thermal image sequence comprises the following steps: determining a temperature threshold based on the thermal plume temperature and the background temperature in the experimental data; and traversing the pixel points of the thermal image sequence, and extracting the pixel points with the temperature value larger than the temperature threshold value to obtain a thermal patch block image sequence.
  3. 3. The intelligent control method based on gas thermal plume detection according to claim 1, wherein analyzing the movement condition of the thermal patch based on the thermal patch image sequence to obtain the rising speed of the thermal plume comprises: Calculating a speed vector set of the hot patch based on a plurality of pairs of successfully matched hot patch blocks in adjacent frames of the hot patch block image sequence; Based on the set of velocity vectors, a rise velocity of the thermal plume is calculated.
  4. 4. The intelligent control method based on gas thermal plume detection according to claim 3, wherein calculating a set of velocity vectors of the thermal plaque based on a plurality of pairs of successfully matched thermal plaque in adjacent frames of the thermal plaque image sequence comprises: Detecting characteristic points of the hot spot block image sequence to obtain characteristic points corresponding to each hot spot block; Calculating descriptors of the feature points, and matching the descriptors between adjacent frames to obtain the hot spot blocks successfully matched; And calculating to obtain a speed vector set based on the displacement of the hot spot blocks successfully matched in pairs.
  5. 5. The intelligent control method based on gas thermal plume detection according to claim 3, wherein calculating the rising speed of the thermal plume based on the set of speed vectors comprises: Based on the appearance characteristics of the hot spots, obtaining weights corresponding to the hot spots; And carrying out weighted calculation on the corresponding speed value in the speed vector set based on the weight to obtain the rising speed of the thermal plume.
  6. 6. The intelligent control method based on gas thermal plume detection according to claim 1, wherein adjusting the operating gear of the intelligent range hood based on the rising speed comprises: The method comprises the steps of obtaining a conversion table calibrated in advance, wherein the calibration process of the conversion table comprises the steps of detecting the experimental speed of the thermal plume and the experimental flow of fuel gas under different gears of the intelligent range hood to obtain the corresponding relation between the speed and the flow; Determining the corresponding target gear from the conversion table based on the current gear and the ascending speed of the intelligent range hood; and adjusting the working gear of the intelligent range hood to the target gear.
  7. 7. The intelligent control method based on gas thermal plume detection according to claim 6, further comprising: Acquiring the corresponding relation of the speed and the flow under the current gear from the conversion table; and determining the current gas flow rate based on the corresponding relation between the rising speed and the speed-flow.
  8. 8. The intelligent range hood is characterized by comprising a fan driving module, an infrared detection module and a control module; the fan driving module is used for working gears under the action of the control module; The infrared detection module is used for continuously detecting thermal plumes generated when the gas stove burns under the control of the control module to obtain a thermal image sequence; The control module for implementing the steps of the method of any one of claims 1 to 7.
  9. 9. The intelligent range hood according to claim 8, wherein the infrared detection module comprises a sensor and a protective cover; The sensor is positioned at the lower side of the intelligent range hood and is aligned with the cooking area of the gas stove so as to detect thermal plumes generated when the gas stove burns and obtain a thermal image sequence; the protective cover is arranged outside the sensor.
  10. 10. An intelligent smoke kitchen linkage system is characterized by comprising an intelligent gas kitchen range and the intelligent smoke ventilator of any one of claims 8-9.

Description

Intelligent control method based on gas thermal plume detection, intelligent range hood and system Technical Field The application relates to the technical field of intelligent range hoods, in particular to an intelligent control method based on gas thermal plume detection, an intelligent range hood and a system. Background In residential and commercial kitchen environments, the cooperative work of the range hood and the gas stove has important significance for improving cooking experience and guaranteeing indoor air quality. The gas stove can generate a large amount of oil smoke and heat in the ignition and combustion processes, and especially under the cooking modes of high-firepower requirements such as quick-frying and the like, the oil smoke emission is more remarkable. If the range hood can not timely and effectively discharge the pollutants, the environment of a kitchen can be influenced, and the damage to the health of a human body can be possibly caused. At present, an infrared temperature measuring device is arranged on a range hood in the existing scheme, non-contact temperature measurement is carried out on a pot, a furnace end and the like above a kitchen range, and the opening and closing states of the kitchen range are judged according to temperature change so as to control the opening and the air quantity of the range hood. However, the temperature data measured by the scheme is the average temperature in a large area of the kitchen range table top, the local temperature rise at the moment of opening and closing has little influence on the measurement result, and the measurement value is easy to average by a surrounding low-temperature area under the condition of covering the cooker cover. Therefore, the working state of the kitchen range cannot be accurately reflected in the existing scheme, so that the situations of lag air quantity adjustment, error shutdown and the like of the range hood occur, and harmful gas cannot be timely discharged. Aiming at the problem of poor control reliability of the range hood in the linkage of the range hood in the related art, no effective solution is proposed at present. Disclosure of Invention In the embodiment, an intelligent control method, an intelligent range hood and an intelligent range hood based on gas thermal plume detection are provided, so that the problem of poor control reliability of the range hood in the related technology is solved. In a first aspect, in this embodiment, there is provided an intelligent control method based on gas thermal plume detection, where the method includes: After the intelligent range hood is started, a thermal image sequence is obtained by continuously detecting thermal plumes generated when a gas stove burns; Dividing the region where the thermal patch is located from the thermal image sequence to obtain a thermal patch block image sequence; analyzing the movement condition of the thermal patch based on the thermal patch image sequence to obtain the rising speed of the thermal plume; And adjusting the working gear of the intelligent range hood based on the rising speed. In some embodiments, the segmenting the region where the thermal patch is located from the thermal image sequence to obtain a thermal patch image sequence includes: determining a temperature threshold based on the thermal plume temperature and the background temperature in the experimental data; and traversing the pixel points of the thermal image sequence, and extracting the pixel points with the temperature value larger than the temperature threshold value to obtain a thermal patch block image sequence. In some of these embodiments, analyzing the motion of the thermal patch based on the thermal patch image sequence to obtain a rise rate of the thermal plume includes: Calculating a speed vector set of the hot patch based on a plurality of pairs of successfully matched hot patch blocks in adjacent frames of the hot patch block image sequence; Based on the set of velocity vectors, a rise velocity of the thermal plume is calculated. In some of these embodiments, in adjacent frames of the hot patch image sequence, computing a set of velocity vectors for the hot patch based on a plurality of pairs of successfully matched hot patches comprises: Detecting characteristic points of the hot spot block image sequence to obtain characteristic points corresponding to each hot spot block; Calculating descriptors of the feature points, and matching the descriptors between adjacent frames to obtain the hot spot blocks successfully matched; And calculating to obtain a speed vector set based on the displacement of the hot spot blocks successfully matched in pairs. In some of these embodiments, calculating the rising velocity of the thermal plume based on the set of velocity vectors includes: Based on the appearance characteristics of the hot spots, obtaining weights corresponding to the hot spots; And carrying out weighted calculation on the corresponding speed va