Temperature adjusting method of hairdressing tool and hairdressing tool

Abstract

The invention discloses a hairdressing tool temperature adjusting method and a hairdressing tool, and the method comprises the steps that an infrared sensing module is arranged at the position, facing the head, of the hairdressing tool, and the infrared sensing module comprises an infrared sensor array composed of an optical unit and a plurality of infrared sensors; an infrared sensing module is used for monitoring and obtaining a two-dimensional temperature matrix facing the hair of the target area in real time; according to the two-dimensional temperature matrix, obtaining a temperature distribution thermal imaging graph of the hair in the target area, obtaining first temperature values and second temperature values of all pixels in the two-dimensional temperature matrix, comparing the first temperature values with a first threshold value and comparing the second temperature values with a second threshold value, and if the first temperature values are greater than the first threshold value and the second temperature values are greater than the second threshold value, determining that the hair is in the target area; and the heating power of the hairdressing tool is reduced. The hairdressing temperature is accurately controlled, irreversible damage to the hair is avoided, and the problems that according to an existing hairdressing tool, temperature control is not accurate, and the risk that the hair is heated and damaged exists are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of hairdressing tools, and in particular to a temperature regulating method for a hairdressing tool and the hairdressing tool. Background Art

[0002] Existing hair styling tools include curling irons, straightening irons, hair dryers, straightening combs, and hair dryers. To ensure a constant outlet temperature, existing hair styling tools, such as hair dryers, often use temperature sensors to collect operating temperature data. However, varying user habits can result in varying hair surface temperatures due to the distance between the outlet and the scalp, even with the same outlet temperature. Excessively high temperatures can easily cause burns or irreversible damage to the hair, such as high-temperature deformation. This is particularly true when blow-drying children or pets, as it's impossible to determine the temperature reaching the child or pet, leading to burns from overheating or chills from low temperatures.

[0003] Therefore, existing hairdressing tools rely on single-point temperature sensors, which can only detect the surface temperature of the heating element and cannot sense the temperature distribution of the actual contact area of the hair. The temperature control is not accurate, resulting in hair heating and damage. These hairdressing tools lack real-time hair quality monitoring capabilities and are prone to hair damage due to improper temperature control. In addition, traditional temperature sensors can only detect the surface temperature of the device and cannot sense the actual heating status of the hair. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to propose a temperature adjustment method for hair styling tools and hair styling tools to solve the problem that current hair styling tools can only detect the surface temperature of the heating element, the temperature control is not accurate, and there is a risk of causing hair damage due to heating.

[0005] The present application proposes a temperature regulation method for a hairdressing tool and a hairdressing tool. The method arranges an infrared sensor module at a position on the hairdressing tool facing the head, compares the average temperature value and the maximum temperature value with a threshold value, and automatically reduces the power of the heating element based on the judgment result, thereby accurately controlling the hairdressing temperature and avoiding irreversible damage to the hair. This solves the problem that current hairdressing tools can only detect the surface temperature of the heating element, resulting in inaccurate temperature control and the risk of causing heat damage to the hair.

[0006] In a first aspect, a method for regulating the temperature of a hairdressing tool comprises:

[0007] Step 100: Arrange an infrared sensor module at a position where the hairdressing tool faces the head. The infrared sensor module includes an optical unit and an infrared sensor array consisting of multiple infrared sensors. The infrared sensor module is used to monitor and obtain a two-dimensional temperature matrix of the hair facing the target area in real time.

[0008] Step 200: Obtain a temperature distribution thermal imaging image of the hair in the target area based on the two-dimensional temperature matrix, obtain a first temperature value and a second temperature value of all pixels in the two-dimensional temperature matrix, compare the first temperature value with a first threshold value, and compare the second temperature value with a second threshold value, respectively. If the first temperature value is greater than the first threshold value and the second temperature value is greater than the second threshold value, reduce the heating power of the hairdressing tool;

[0009] The first temperature value is the average temperature value of all pixels, and the second temperature value is the maximum temperature value of all pixels.

[0010] In conjunction with the temperature adjustment method for hairdressing tools according to the first aspect of the present invention, in a first possible implementation, step 100 includes:

[0011] Step 110: If the hairdressing tool is a hair dryer, the infrared sensor array is disposed at the air outlet of the hair dryer, and the infrared sensor array is a ring-shaped sensor array;

[0012] Step 120: If the hairdressing tool is a hair straightener, the infrared sensor array is disposed on both sides of the heating plate of the hair straightener, and the infrared sensor array is a rectangular sensor array.

[0013] In conjunction with the temperature adjustment method for hairdressing tools according to the first aspect of the present invention, in a second possible implementation, step 100 includes:

[0014] Step 130: Utilize each pixel of the infrared sensor array to absorb infrared radiation and convert the infrared radiation into heat energy;

[0015] Step 140: Convert thermal energy into an electrical signal using the Seebeck effect;

[0016] Step 150: amplify, filter, and perform digital-to-analog conversion on the electrical signal to obtain a preliminary temperature digital signal for each pixel;

[0017] Step 160 : Correct, digitally filter, and integrate the preliminary temperature digital signal to obtain the two-dimensional temperature matrix.

[0018] In conjunction with the second possible implementation manner of the first aspect of the present invention, in a third possible implementation manner, step 130 includes:

[0019] Step 131: using the optical unit to converge the infrared radiation of the target area and distribute it to each pixel according to the spatial position;

[0020] Step 132 : The thermopile sensor unit of each pixel converts the absorbed infrared radiation into thermal energy.

[0021] In combination with the second possible implementation manner of the first aspect of the present invention, in a fourth possible implementation manner, step 150 includes:

[0022] Step 151: using an amplifier to preliminarily amplify the electrical signal;

[0023] Step 152: Filter the amplified electrical signal using a filter to remove high-frequency noise;

[0024] Step 153: Use an ADC converter to convert the analog electrical signal into a digital signal to obtain a preliminary temperature digital signal of each pixel.

[0025] In conjunction with the second possible implementation manner of the first aspect of the present invention, in a fifth possible implementation manner, step 160 includes:

[0026] Step 161: calibrate the preliminary temperature digital signal of each pixel;

[0027] Step 162: digitally filter the calibrated temperature digital signal to obtain a temperature digital signal for each pixel;

[0028] Step 163: Arrange the temperature digital signals of all pixels according to their positions to obtain the two-dimensional temperature matrix.

[0029] In conjunction with the temperature adjustment method for hairdressing tools according to the first aspect of the present invention, in a sixth possible implementation, step 200 includes:

[0030] Step 210: using a color mapping method, converting the two-dimensional temperature matrix into a temperature distribution thermal imaging image;

[0031] Step 220: Display the temperature distribution thermal imaging image on the display screen of the hairdressing tool to prompt the user.

[0032] In a second aspect, a hairdressing tool adopts the temperature regulation method of the hairdressing tool described in the first aspect, comprising:

[0033] Infrared sensor module;

[0034] Heating module;

[0035] Control module;

[0036] The infrared sensing module and the heating module are electrically connected to the control module respectively;

[0037] The infrared sensor module is arranged at a position where the hairdressing tool faces the head, and includes an optical unit and an infrared sensor array composed of multiple infrared sensors, which is used to monitor and obtain a two-dimensional temperature matrix of the hair facing the target area in real time;

[0038] The control module is configured to obtain a thermal imaging image of the temperature distribution of the hair in the target area based on the two-dimensional temperature matrix, obtain a first temperature value and a second temperature value of all pixels in the two-dimensional temperature matrix, compare the first temperature value with a first threshold value, and compare the second temperature value with a second threshold value, respectively, and reduce the heating power of the hairdressing tool if the first temperature value is greater than the first threshold value and the second temperature value is greater than the second threshold value;

[0039] The first temperature value is the average temperature value of all pixels, and the second temperature value is the maximum temperature value of all pixels.

[0040] With reference to the hairdressing tool according to the second aspect of the present invention, in a first possible implementation manner, the infrared sensor array is a ring sensor array or a rectangular sensor array.

[0041] In combination with the first possible implementation manner of the second aspect of the present invention, in a second possible implementation manner, the infrared sensor module includes:

[0042] a first conversion unit, configured to convert the infrared radiation into heat energy by utilizing each pixel of the infrared sensor array to absorb infrared radiation;

[0043] a second conversion unit, configured to convert thermal energy into an electrical signal using the Seebeck effect;

[0044] A digital signal processing unit is used to amplify, filter and perform digital-to-analog conversion on the electrical signal to obtain a preliminary temperature digital signal for each pixel;

[0045] The integration unit is used to correct, digitally filter and integrate the preliminary temperature digital signal to obtain the two-dimensional temperature matrix.

[0046] The temperature regulation method and hairdressing tool of the present invention dispose an infrared sensor module at a position on the hairdressing tool facing the head, compare the average temperature value and the maximum temperature value with a threshold value, and automatically reduce the power of the heating element based on the determination result to precisely control the hairdressing temperature and avoid irreversible damage to the hair. This solves the problem that current hairdressing tools can only detect the surface temperature of the heating element, resulting in inaccurate temperature control and the risk of heat damage to the hair. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the solutions in this application, a brief introduction will be given below to the drawings required for use in the description of the embodiments of this application. Obviously, the drawings described below are some embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0048] Figure 1This is a flow chart of an embodiment of a temperature adjustment method for a hairdressing tool of the present application;

[0049] Figure 2 yes Figure 1 A flowchart of a specific implementation of step 100;

[0050] Figure 3 yes Figure 2 A flowchart of a specific implementation method after step 120;

[0051] Figure 4 yes Figure 3 A flowchart of a specific implementation of step 130;

[0052] Figure 5 yes Figure 3 A flowchart of a specific implementation of step 150;

[0053] Figure 6 yes Figure 3 A flowchart of a specific implementation of step 160;

[0054] Figure 7 yes Figure 1 A flowchart of a specific implementation of step 200;

[0055] Figure 8 This is a schematic diagram of the module structure of a hairdressing tool of the present application;

[0056] Figure 9 This is a schematic diagram of the module structure of an infrared sensor module in a hairdressing tool of the present application. DETAILED DESCRIPTION

[0057] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0058] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0061] The purpose of the embodiments of the present application is to propose a temperature adjustment method for hair styling tools and hair styling tools to solve the problem that current hair styling tools can only detect the surface temperature of the heating element, the temperature control is not accurate, and there is a risk of causing hair damage due to heating.

[0062] The present application proposes a temperature regulation method for a hairdressing tool and a hairdressing tool. The method arranges an infrared sensor module at a position on the hairdressing tool facing the head, compares the average temperature value and the maximum temperature value with a threshold value, and automatically reduces the power of the heating element based on the judgment result, thereby accurately controlling the hairdressing temperature and avoiding irreversible damage to the hair. This solves the problem that current hairdressing tools can only detect the surface temperature of the heating element, resulting in inaccurate temperature control and the risk of causing heat damage to the hair.

[0063] First, a method for regulating the temperature of a hairdressing tool, please refer to Figure 1 , Figure 1 This is a flow chart of an embodiment of a temperature adjustment method for a hairdressing tool of the present application, comprising:

[0064] Step 100: Arrange an infrared sensor module at a position where the hairdressing tool faces the head. The infrared sensor module includes an optical unit and an infrared sensor array consisting of multiple infrared sensors. The infrared sensor module is used to monitor and obtain a two-dimensional temperature matrix of the hair facing the target area in real time.

[0065] In a preferred embodiment, please refer to Figure 2 , Figure 2 yes Figure 1Flowchart of a specific implementation of step 100 in the embodiment; step 100 includes: step 110, if the hair styling tool is a hair dryer, disposing an infrared sensor array at the air outlet of the hair dryer, and the infrared sensor array is a circular sensor array; step 120, if the hair styling tool is a hair straightener, disposing infrared sensor arrays on both sides of a heating plate of the hair straightener, and the infrared sensor array is a rectangular sensor array.

[0066] In this embodiment, when the hair styling tool is a hair straightener (which can be a hair straightener, a curling iron, a straightening comb, or a product without a hair dryer or heating element), a micro infrared sensor array can be embedded on both sides of the ceramic heating plate to monitor the temperature gradient (center temperature v step edge temperature) of the hair passing through in real time. When local overheating (greater than 180°C) is detected, the power of the corresponding area is automatically reduced.

[0067] In a preferred embodiment, please refer to Figure 3 , Figure 3 yes Figure 2 Flowchart of a specific embodiment after step 120; step 100 includes:

[0068] Step 130: Utilize each pixel of the infrared sensor array to absorb infrared radiation and convert the infrared radiation into heat energy. In a preferred embodiment, please refer to Figure 4 , Figure 4 yes Figure 3 Flowchart of a specific implementation of step 130; step 130 includes:

[0069] Step 131 , using an optical unit to converge infrared radiation from a target area and distribute it to each pixel according to its spatial position; Step 132 , the thermopile sensor unit of each pixel converts the absorbed infrared radiation into heat energy.

[0070] The infrared radiation of the target area is concentrated by an optical unit (such as a lens, Fresnel lens or microlens array) and distributed to each pixel unit of the sensor array according to the spatial position.

[0071] The optical unit determines the field of view (FOV) and spatial resolution, ensuring that each pixel corresponds to an independent field of view unit (e.g., a tiny area of the target area). The absorption layer (a material with high infrared absorptivity, such as a silicon-based thin film or a metal-semiconductor composite layer) of each MEMs-step thermopile sensor unit absorbs incident infrared energy and converts it into heat. The absorption layer is thermally isolated from the substrate by a suspended structure (e.g., an air bridge or cantilever beam), reducing heat loss and improving the efficiency of local temperature rise.

[0072] Step 140: Utilize the Seebeck effect to convert thermal energy into an electrical signal. The temperature of the absorption layer of each pixel sensor unit rises, forming the "hot end." The unexposed support structure or substrate forms the "cold end." The temperature difference ΔT between the hot and cold ends triggers the Seebeck effect, generating a weak thermoelectric potential across the thermopile. The thermopile can enhance the output signal and improve the signal-to-noise ratio by connecting multiple thermocouples in series.

[0073] Step 150: Amplify, filter, and perform digital-to-analog conversion on the electrical signal to obtain a preliminary temperature digital signal for each pixel.

[0074] In a preferred embodiment, please refer to Figure 5 , Figure 5 yes Figure 3 Flowchart of a specific implementation of step 150 in FIG. 1 ; step 150 includes: step 151, using an amplifier to preliminarily amplify the electrical signal; step 152, using a filter to filter the amplified electrical signal to remove high-frequency noise; step 153, using an ADC converter to convert the analog electrical signal into a digital signal to obtain a preliminary temperature digital signal for each pixel.

[0075] In this embodiment, a preamplifier and a filter can be used to process the electrical signal. The preamplifier performs preliminary amplification on the microvolt-level thermoelectric potential signal (the gain is usually 100-1000 times) to reduce the impact of noise. The filter (such as a low-pass filter) filters out high-frequency noise (such as circuit noise, environmental electromagnetic interference) and retains low-frequency signals related to temperature changes. The analog-to-digital converter (ADC) converts the analog voltage signal into a digital signal (such as 12-bit or 16-bit data) through a high-precision ADC to facilitate subsequent digital processing. All pixels in the infrared sensor array are sampled synchronously to ensure the temporal and spatial consistency of the temperature distribution data.

[0076] Step 160: Correct, digitally filter and integrate the preliminary temperature digital signal to obtain a two-dimensional temperature matrix. Figure 6 , Figure 6 yes Figure 3 Flowchart of a specific implementation of step 160; step 160 includes: step 161, calibrating the preliminary temperature digital signal of each pixel; step 162, digitally filtering the calibrated temperature digital signal to obtain the temperature digital signal of each pixel; step 163, arranging the temperature digital signals of all pixels according to their positions to obtain a two-dimensional temperature matrix.

[0077] In this embodiment, the response differences between pixels can be eliminated through non-uniformity correction (NUC): due to manufacturing process deviations, there are differences in sensitivity and dark current of different pixels, and the raw data of each pixel needs to be corrected through a two-point calibration method (normal temperature / high temperature calibration) or a real-time calibration algorithm.

[0078] In one embodiment, the hot-end temperature can be calculated based on the thermoelectric potential and the cold-end temperature, and then combined with the emissivity ε of the target object (through user input or default value, such as the human body emissivity of approximately 0.95), the actual target temperature can be inverted using Planck's law or a simplified model (such as the Stefan-Boltzmann law approximation) to perform temperature compensation.

[0079] Furthermore, the temperature data of all pixels are arranged according to the physical positions of the array (row and column coordinates) to form a two-dimensional temperature matrix (eg, a 64×64 data array) corresponding to the target area space.

[0080] Step 200: Obtain a thermal image of the temperature distribution of the hair in the target area based on the two-dimensional temperature matrix, obtain a first temperature value and a second temperature value for all pixels in the two-dimensional temperature matrix, compare the first temperature value with a first threshold value, and the second temperature value with a second threshold value, respectively. If the first temperature value is greater than the first threshold value and the second temperature value is greater than the second threshold value, reduce the heating power of the hairdressing tool;

[0081] The first temperature value is the average temperature value of all pixels, and the second temperature value is the maximum temperature value of all pixels.

[0082] In a preferred embodiment, please refer to Figure 7 , Figure 7 yes Figure 1 Flowchart of a specific implementation of step 200; step 200 includes: step 210, using a color mapping method, converting the two-dimensional temperature matrix into a temperature distribution thermal imaging map; step 220, displaying the temperature distribution thermal imaging map on the display screen of the hairdressing tool to prompt the user.

[0083] In this embodiment, the temperature value is converted into a visual thermal image through a color mapping algorithm (such as rainbow color scale, iron red color scale), and the high temperature area is represented by red / white, and the low temperature area is represented by blue / black.

[0084] The temperature matrix or thermal imaging image is connected to the display module through the communication interface to output the thermal imaging data.

[0085] In the second aspect, a hairdressing tool adopts the temperature adjustment method of the hairdressing tool of the first aspect, please refer to Figure 8 , Figure 8This is a schematic diagram of the modular structure of a hairdressing tool of the present application; it includes an infrared sensing module 310, a heating module 330, and a control module 320; the infrared sensing module 310 and the heating module 330 are respectively electrically connected to the control module 320; the infrared sensing module 310 is arranged at a position of the hairdressing tool facing the head, and includes an optical unit and an infrared sensor array consisting of multiple infrared sensors, which is used to monitor and obtain a two-dimensional temperature matrix of the hair facing the target area in real time; the control module 320 is used to obtain a thermal imaging image of the temperature distribution of the hair in the target area based on the two-dimensional temperature matrix, obtain a first temperature value and a second temperature value of all pixels in the two-dimensional temperature matrix, compare the first temperature value with a first threshold value, and the second temperature value with a second threshold value, respectively, and reduce the heating power of the hairdressing tool if the first temperature value is greater than the first threshold value and the second temperature value is greater than the second threshold value; wherein the first temperature value is the average temperature value of all pixels, and the second temperature value is the maximum temperature value of all pixels.

[0086] For further information, please refer to Figure 9 , Figure 9 This is a schematic diagram of the module structure of the infrared sensor module in a hair styling tool of the present application. The infrared sensor array is a ring sensor array or a rectangular sensor array. If the hair styling tool is a hair dryer, an infrared sensor array is set at the air outlet of the hair dryer, and the infrared sensor array is a ring sensor array; if the hair styling tool is a hair straightener, an infrared sensor array is set on both sides of the heating plate of the hair straightener, and the infrared sensor array is a rectangular sensor array. In this embodiment, when the hair styling tool is a hair straightener (it can be a hair straightener, a curling iron, a straightening comb, or a product without a hair dryer or heating function), a miniature infrared sensor array can be embedded on both sides of the ceramic heating plate to monitor the temperature gradient (center temperature vs. edge temperature) of the hair passing through in real time, and automatically reduce the power of the corresponding area when local overheating (greater than 180°C) is detected.

[0087] Furthermore, the infrared sensor module 310 includes:

[0088] The first conversion unit 311 is used to absorb infrared radiation by each pixel of the infrared sensor array and convert the infrared radiation into thermal energy. The infrared radiation of the target area is converged by the optical unit and distributed to each pixel according to the spatial position; the thermopile sensor unit of each pixel converts the absorbed infrared radiation into thermal energy. The infrared radiation of the target area is converged by an optical unit (such as a lens, a Fresnel lens or a microlens array) and distributed to each pixel unit of the sensor array according to the spatial position. The optical unit determines the field of view (FOV) and spatial resolution to ensure that each pixel corresponds to an independent field of view unit (such as a tiny area of the target area). The absorption layer (high infrared absorption rate material, such as silicon-based film, metal-semiconductor composite layer) of each MEMS thermopile sensor unit absorbs the incident infrared energy and converts it into thermal energy.

[0089] The second conversion unit 312 is used to convert thermal energy into an electrical signal using the Seebeck effect. The absorption layer is thermally isolated from the substrate by a suspended structure (such as an air bridge or a cantilever beam), which reduces heat loss and improves the efficiency of local temperature rise. The Seebeck effect is used to convert thermal energy into an electrical signal. The temperature of the absorption layer of each pixel sensor unit rises to form a "hot end", and the unradiated support structure or substrate is the "cold end". The temperature difference ΔT between the hot and cold ends triggers the Seebeck effect, generating a weak thermoelectric potential at both ends of the thermopile. The thermopile can enhance the output signal and improve the signal-to-noise ratio by connecting multiple thermocouples in series.

[0090] The digital signal processing unit 313 is configured to amplify, filter, and perform digital-to-analog conversion on the electrical signal to obtain a preliminary digital temperature signal for each pixel. The electrical signal is initially amplified using an amplifier; the amplified electrical signal is filtered using a filter to remove high-frequency noise; and the analog-to-digital converter (ADC) is used to convert the analog electrical signal into a digital signal to obtain a preliminary digital temperature signal for each pixel. In this embodiment, a preamplifier and filter can be used to process the electrical signal. The preamplifier performs preliminary amplification of the microvolt-level thermoelectric potential signal (typically with a gain of 100-1000 times) to reduce the effects of noise. The filter (e.g., a low-pass filter) removes high-frequency noise (e.g., circuit noise and environmental electromagnetic interference) while retaining low-frequency signals related to temperature changes. The analog-to-digital converter (ADC) uses a high-precision ADC to convert the analog voltage signal into a digital signal (e.g., 12-bit or 16-bit data) for subsequent digital processing. All pixels in the infrared sensor array are sampled synchronously to ensure the temporal and spatial consistency of the temperature distribution data.

[0091] Integration unit 314 is configured to correct, digitally filter, and integrate the preliminary digital temperature signal to obtain a two-dimensional temperature matrix. In a preferred embodiment, the preliminary digital temperature signal for each pixel is calibrated; the calibrated digital temperature signal is digitally filtered to obtain a digital temperature signal for each pixel; and the digital temperature signals for all pixels are arranged according to their positions to obtain a two-dimensional temperature matrix.

[0092] In this embodiment, the response differences between pixels can be eliminated through non-uniformity correction (NUC): due to manufacturing process deviations, there are differences in sensitivity and dark current of different pixels, and the raw data of each pixel needs to be corrected through a two-point calibration method (normal temperature / high temperature calibration) or a real-time calibration algorithm.

[0093] In one embodiment, the hot-end temperature can be calculated based on the thermoelectric potential and the cold-end temperature, and then combined with the emissivity ε of the target object (through user input or default value, such as the human body emissivity of approximately 0.95), the actual target temperature can be inverted using Planck's law or a simplified model (such as the Stefan-Boltzmann law approximation) to perform temperature compensation.

[0094] Furthermore, the temperature data of all pixels are arranged according to the physical positions of the array (row and column coordinates) to form a two-dimensional temperature matrix (eg, a 64×64 data array) corresponding to the target area space.

[0095] The temperature regulation method and hairdressing tool of the present invention dispose an infrared sensor module at a position on the hairdressing tool facing the head, compare the average temperature value and the maximum temperature value with a threshold value, and automatically reduce the power of the heating element based on the determination result to precisely control the hairdressing temperature and avoid irreversible damage to the hair. This solves the problem that current hairdressing tools can only detect the surface temperature of the heating element, resulting in inaccurate temperature control and the risk of heat damage to the hair.

[0096] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for regulating the temperature of a hairdressing tool, comprising: Step 100: Arrange an infrared sensor module at a position where the hairdressing tool faces the head. The infrared sensor module includes an optical unit and an infrared sensor array consisting of multiple infrared sensors. The infrared sensor module is used to monitor and obtain a two-dimensional temperature matrix of the hair facing the target area in real time. Step 200: Obtain a temperature distribution thermal imaging image of the hair in the target area based on the two-dimensional temperature matrix, obtain a first temperature value and a second temperature value of all pixels in the two-dimensional temperature matrix, compare the first temperature value with a first threshold value, and compare the second temperature value with a second threshold value, respectively. If the first temperature value is greater than the first threshold value and the second temperature value is greater than the second threshold value, reduce the heating power of the hairdressing tool; The first temperature value is the average temperature value of all pixels, and the second temperature value is the maximum temperature value of all pixels.

2. The temperature adjustment method of a hairdressing tool according to claim 1, wherein step 100 comprises: Step 110: If the hairdressing tool is a hair dryer, the infrared sensor array is disposed at the air outlet of the hair dryer, and the infrared sensor array is a ring-shaped sensor array; Step 120: If the hairdressing tool is a hair straightener, the infrared sensor array is disposed on both sides of the heating plate of the hair straightener, and the infrared sensor array is a rectangular sensor array.

3. The temperature adjustment method of a hairdressing tool according to claim 1, characterized in that: The step 100 includes: Step 130: Utilize each pixel of the infrared sensor array to absorb infrared radiation and convert the infrared radiation into heat energy; Step 140: Convert thermal energy into an electrical signal using the Seebeck effect; Step 150: amplify, filter, and perform digital-to-analog conversion on the electrical signal to obtain a preliminary temperature digital signal for each pixel; Step 160 : Correct, digitally filter, and integrate the preliminary temperature digital signal to obtain the two-dimensional temperature matrix.

4. The temperature adjustment method of a hairdressing tool according to claim 3, characterized in that: The step 130 includes: Step 131: using the optical unit to converge the infrared radiation of the target area and distribute it to each pixel according to the spatial position; Step 132 : The thermopile sensor unit of each pixel converts the absorbed infrared radiation into thermal energy.

5. The temperature adjustment method of a hairdressing tool according to claim 3, characterized in that: The step 150 includes: Step 151: using an amplifier to preliminarily amplify the electrical signal; Step 152: Filter the amplified electrical signal using a filter to remove high-frequency noise; Step 153: Use an ADC converter to convert the analog electrical signal into a digital signal to obtain a preliminary temperature digital signal of each pixel.

6. The temperature adjustment method of a hairdressing tool according to claim 3, characterized in that: The step 160 includes: Step 161: calibrate the preliminary temperature digital signal of each pixel; Step 162: digitally filter the calibrated temperature digital signal to obtain a temperature digital signal for each pixel; Step 163: Arrange the temperature digital signals of all pixels according to their positions to obtain the two-dimensional temperature matrix.

7. The temperature adjustment method of a hairdressing tool according to claim 1, characterized in that: The step 200 includes: Step 210: using a color mapping method, converting the two-dimensional temperature matrix into a temperature distribution thermal imaging image; Step 220: Display the temperature distribution thermal imaging image on the display screen of the hairdressing tool to prompt the user.

8. A hairdressing tool, using the temperature regulation method of a hairdressing tool according to any one of claims 1 to 7, characterized in that: include: Infrared sensor module; Heating module; Control module; The infrared sensing module and the heating module are electrically connected to the control module respectively; The infrared sensor module is arranged at a position where the hairdressing tool faces the head, and includes an optical unit and an infrared sensor array composed of multiple infrared sensors, which is used to monitor and obtain a two-dimensional temperature matrix of the hair facing the target area in real time; The control module is configured to obtain a thermal imaging image of the temperature distribution of the hair in the target area based on the two-dimensional temperature matrix, obtain a first temperature value and a second temperature value of all pixels in the two-dimensional temperature matrix, compare the first temperature value with a first threshold value, and compare the second temperature value with a second threshold value, respectively, and reduce the heating power of the hairdressing tool if the first temperature value is greater than the first threshold value and the second temperature value is greater than the second threshold value; The first temperature value is the average temperature value of all pixels, and the second temperature value is the maximum temperature value of all pixels. 9 . The hairdressing tool according to claim 8 , wherein the infrared sensor array is a ring sensor array or a rectangular sensor array.

10. The hairdressing tool according to claim 9, characterized in that: The infrared sensor module includes: a first conversion unit, configured to convert the infrared radiation into heat energy by utilizing each pixel of the infrared sensor array to absorb infrared radiation; a second conversion unit, configured to convert thermal energy into an electrical signal using the Seebeck effect; A digital signal processing unit is used to amplify, filter and perform digital-to-analog conversion on the electrical signal to obtain a preliminary temperature digital signal for each pixel; The integration unit is used to correct, digitally filter and integrate the preliminary temperature digital signal to obtain the two-dimensional temperature matrix.

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