Temperature control method for hair straightener based on clamping degree detection

Abstract

The application discloses a straightening iron temperature control method based on clamping degree detection, comprising the following steps: collecting a current pressure signal value of a to-be-processed hair strand in a clamped state by a clamping detection module; comparing the current pressure signal value with a preset pressure signal value by a control module to determine a current clamping force level; based on the current clamping force level, the working temperature of an upper heating plate and a lower heating plate is adaptively adjusted so that the working temperature of the upper heating plate and the lower heating plate is maintained in a target temperature interval corresponding to the clamping force level; a small clamping force level corresponds to a high temperature interval, a medium clamping force level corresponds to a medium temperature interval, and a large clamping force level corresponds to a low temperature interval. Effects: applying high temperature with small clamping force can guarantee that the hair strand is fully heated and shaped under slight clamping; applying medium temperature with medium clamping force can realize balanced shaping and hair care effects of the hair strand; and applying low temperature with large clamping force can avoid high-temperature scalding and broken hair quality under high-pressure clamping, so that the application can be adapted to different working conditions and the straightening effect is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of intelligent control technology for hair styling appliances, and in particular to a method for temperature control of a hair straightener based on clamping degree detection. Background Technology

[0002] Traditional hair straighteners require users to rely on their experience to control the pressure when clamping and the temperature when pulling hair. For users unfamiliar with hair straighteners, too much clamping force and high heating plate temperature can easily burn the hair, while too little clamping force and low heating plate temperature make styling impossible.

[0003] Therefore, a hair straightener with hair clamping force detection is needed to help users protect their hair while creating styles.

[0004] Currently, traditional hair straighteners rely entirely on the user's subjective feeling to control the clamping force applied to the hair strands by their heated plates during operation. Because different users have significantly different grip strengths, the actual clamping pressure of the same hair straightener can vary greatly from user to user, creating a completely unpredictable and uncontrollable blind spot. This long-standing lack of pressure data has prevented the hair straightener industry from incorporating this crucial physical quantity of 'clamping force' into its temperature control algorithms during development. Users can only guess whether the clamp is too tight (damaging the hair strands) or too loose (ineffective straightening). This is a technological gap that those in the know have long accepted but have never attempted to quantify and resolve. Summary of the Invention

[0005] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the object of this invention is to propose a method for controlling the temperature of a hair straightener based on clamping degree detection.

[0006] To achieve one of the above objectives, a hair straightener temperature control method based on clamping degree detection according to an embodiment of the present invention includes the following steps: S1. Pre-calibration step: Place a standard hair bundle between the upper and lower heating plates of the hair straightener and perform clamping tests with different clamping forces. Record the preset pressure signal value of the clamping detection module corresponding to each level of clamping force, establish a mapping relationship table containing "clamping force level - preset pressure signal value - target temperature range", and store the mapping relationship table in the control module of the hair straightener. S2. Real-time detection step: Use the hair straightener to clamp the hair bundle to be processed, and use the clamping detection module to collect the current pressure signal value of the hair bundle under clamping state in real time; S3, Force Determination Step: The control module reads the current pressure signal value, compares it with the preset pressure signal value, and determines the current clamping force level. S4. Temperature control adjustment step: Based on the determined current clamping force level, the working temperature of the upper heating plate and the lower heating plate of the hair straightener is adaptively adjusted by the control module so that the working temperature of the upper heating plate and the lower heating plate of the hair straightener is maintained in the target temperature range corresponding to the clamping force level. The clamping force levels include at least: low clamping force level, medium clamping force level and high clamping force level; the low clamping force level corresponds to the high temperature range, the medium clamping force level corresponds to the medium temperature range, and the high clamping force level corresponds to the low temperature range.

[0007] In addition, the hair straightener temperature control method based on clamping degree detection according to the above embodiments of the present invention may also have the following additional technical features: According to an embodiment of the present invention, the pre-calibration step specifically includes: S11. The control module of the hair straightener completes the whole machine self-test and zero-point calibration, so that the clamping detection module of the hair straightener is in the initial state of zero clamping. S12. Place a standard hair bundle between the upper and lower heating plates of the hair straightener and apply three clamping forces of small clamping force, medium clamping force and large clamping force respectively to perform clamping test; S13. Record the preset pressure signal value output by the clamping detection module under each clamping force, and establish a mapping table containing the corresponding relationship of "clamping force level - preset pressure signal value - target temperature range"; In the mapping table, the preset pressure signal value range corresponding to the small clamping force level is defined as [V1, V2), the preset pressure signal value range corresponding to the medium clamping force level is defined as [V2, V3), and the preset pressure signal value range corresponding to the large clamping force level is defined as [V3, V4]. Wherein, V1, V2, V3, and V4 are all pressure signal critical thresholds preset by the control module of the hair straightener, and satisfy 0 <V1<V2<V3<V4; S14. Store the completed mapping table in the built-in memory of the control module.

[0008] According to an embodiment of the present invention, the real-time detection step specifically includes: S21. Fully open the upper heating plate and lower heating plate of the hair straightener, keeping them in a non-clamped state, and reset the clamping detection module to the zero clamping initial state; S22. The hair strand to be processed is clamped using the hair straightener. The upper heating plate and the lower heating plate of the hair straightener are relatively displaced. The current pressure signal value V_cur output by the clamping detection module is collected in real time by the control module.

[0009] According to an embodiment of the present invention, the force determination step specifically includes: S31. The control module reads the real-time acquired current pressure signal value V_cur; S32. Compare the read current pressure signal value V_cur with the preset pressure signal value range stored in the mapping table; S33. Based on the comparison results, determine whether the current clamping force level is low clamping force level, medium clamping force level or high clamping force level. If V_cur∈[V1,V2), then it is determined to be a low clamping force level; If V_cur∈[V2,V3), then it is determined to be of medium clamping force level; If V_cur∈[V3,V4], then it is determined to be a high clamping force level.

[0010] According to an embodiment of the present invention, the temperature control adjustment step specifically includes: S41. Based on the determined current clamping force level, the corresponding target temperature range is retrieved from the mapping table by the control module; S42. The upper and lower heating plates of the hair straightener are driven to heat up through the control module, and their actual working temperature is monitored in real time. S43. When the actual operating temperature reaches the target temperature range, it is maintained within the target temperature range.

[0011] According to one embodiment of the present invention, the hair straightener is configured with an upper clamp arm and a lower clamp arm disposed opposite to each other; The upper heating plate is installed at the lower front part of the upper clamping arm, and an upper floating elastic element is provided between its upper end surface and the lower bottom surface of the upper clamping arm; the lower heating plate is installed at the upper front part of the lower clamping arm, and a lower floating elastic element is provided between its lower bottom surface and the upper surface of the lower clamping arm. When the upper and lower heating plates of the hair straightener are used to clamp the hair bundle to be processed, the clamping force of the hair bundle to be processed is adjustable under the elastic deformation of the upper and lower floating elastic elements.

[0012] According to one embodiment of the present invention, the clamping detection module includes linear Hall sensors and cooperating magnets disposed opposite to the upper and lower clamping arms of the hair straightener; When the upper and lower heating plates of the hair straightener undergo relative clamping displacement, the distance between the linear Hall sensor and the magnet changes synchronously, causing the output voltage of the linear Hall sensor to change linearly; the preset pressure signal value and the current pressure signal value are both the output voltage values ​​of the linear Hall sensor.

[0013] According to one embodiment of the present invention, the high temperature range is set to [180°C, 200°C], the medium temperature range is set to [160°C, 180°C], and the low temperature range is set to [140°C, 160°C].

[0014] According to one embodiment of the present invention, after the temperature control adjustment step, a dynamic temperature adjustment step is further included: S5. During the process of straightening the hair strand to be treated using the hair straightener, if the clamping force of the hair straightener changes, the control module will repeat steps S2-S4 in a loop to dynamically adjust the temperature of the clamped hair strand to be treated.

[0015] The beneficial effects of this invention are: In its specific implementation, this application employs a low clamping force and high temperature to ensure that the hair strands are fully heated and shaped under slight clamping, thus preventing styling failure; a medium clamping force and medium temperature achieve a balanced shaping and hair care effect; and a high clamping force and low temperature prevent high-temperature burns and hair breakage under high pressure and strong clamping. In this way, the implementation of this application can be fully adapted to different usage conditions, greatly improve the straight hair styling effect, and effectively reduce hair damage and other problems.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is the flowchart of the hair straightener temperature control method based on clamping degree detection of the present invention. Figure 1 ; Figure 2 This is a flowchart illustrating the specific steps of step S1 in this embodiment of the invention. Figure 3 This is a flowchart illustrating the specific steps of step S2 in this embodiment of the invention. Figure 4 This is a flowchart illustrating the specific steps of step S3 in this embodiment of the invention. Figure 5 This is a flowchart illustrating the specific steps of step S4 in this embodiment of the invention. Figure 6This is the flowchart of the hair straightener temperature control method based on clamping degree detection of the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the overall planar structure of the hair straightener in the open state, so that the clamping detection module is in the initial state of zero clamping, in an embodiment of the present invention. Figure 8 This is a diagram illustrating the usage state of the hair straightener under low clamping force in an embodiment of the present invention. Figure 9 yes Figure 8 Enlarged view of A in the middle; Figure 10 This is a diagram illustrating the usage state of the hair straightener under medium clamping force in an embodiment of the present invention; Figure 11 yes Figure 10 Enlarged view of B in the middle; Figure 12 This is a diagram illustrating the usage state of the hair straightener under high clamping force in an embodiment of the present invention; Figure 13 yes Figure 12 Enlarged view of C; Figure 14 This is a partial longitudinal cross-sectional view of the front end of the hair straightener in the closed state in an embodiment of the present invention; Icon labels: Hair straightener 1000; Upper clamp arm 10; Lower clamping arm 20; Upper heating plate 30; Lower heating plate 40; Linear Hall sensor 50; Magnet 60; 70mm floating elastic element; Lower floating elastic element 80; The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," and "radial," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] The following describes in detail, with reference to the accompanying drawings, a method for controlling the temperature of a hair straightener based on clamping degree detection according to an embodiment of the present invention.

[0025] Reference Figure 1 As shown, the hair straightener temperature control method based on clamping degree detection according to an embodiment of the present invention is preferably applied to a hair straightener having an upper heating plate and a lower heating plate that can float up and down elastically, and includes the following steps: S1. Pre-calibration step: Place a standard hair bundle between the upper heating plate 30 and the lower heating plate 40 of the hair straightener 1000, perform clamping tests with different clamping forces, record the preset pressure signal value of the clamping detection module corresponding to each level of clamping force, establish a mapping relationship table containing "clamping force level - preset pressure signal value - target temperature range", and store the mapping relationship table in the control module of the hair straightener 1000; The clamping force levels include at least: small clamping force level, medium clamping force level and large clamping force level; It should be noted that before performing steps S2, S3, and S4, the hair straightener 1000 must undergo a factory pre-calibration process to provide standard data support for subsequent intelligent temperature control. This pre-calibration step is a fundamental prerequisite for the precise operation of the hair straightener 1000. The specific implementation method is as follows: A standard hair bundle, conforming to industry standards, is selected for testing. The thickness, hardness, toughness, and moisture content of this standard hair bundle are all fixed standard values, thus avoiding testing errors caused by different hair types. The standard hair bundle is placed stably between the upper heating plate 30 and the lower heating plate 40 of the hair straightener 1000. Simulating the clamping operation used by a user, different gradient clamping forces are applied to the upper heating plate 30 and the lower heating plate 40 of the hair straightener 1000 using a manual gradient pressure method, completing multiple sets of clamping tests.

[0026] Because the upper heating plate 30 and lower heating plate 40 of the hair straightener 1000 can float up and down elastically, the clamping force of the hair strands is variable. This application controls the temperature of the clamped hair strands based on the clamping force.

[0027] During each clamping test, the standard preset pressure signal value output by the clamping detection module corresponding to each clamping force level is recorded synchronously. The correspondence between the pressure signal, the force level, and the suitable temperature of the upper heating plate 30 and lower heating plate 40 of the hair straightener 1000 is sorted out, and a standardized three-dimensional mapping relationship table of "clamping force level - preset pressure signal value - target temperature range" is established. The mapping relationship table is then stored in the control module of the hair straightener 1000 as the sole standard basis for the hair straightener 1000 to make subsequent real-time judgments and adjust the temperature.

[0028] S2. Real-time detection step: Use the hair straightener 1000 to clamp the hair bundle to be processed, and collect the current pressure signal value of the hair bundle under clamping state in real time through the clamping detection module; In specific operation, the user holds the hair straightener 1000 and clamps their hair with the upper heating plate 30 and lower heating plate 40 of the hair straightener 1000. Throughout the operation of the hair straightener 1000, the built-in clamping detection module continuously and uninterruptedly collects the pressure signal under the current hair clamping state, and captures the dynamic changes in the user's gripping force in real time. There is no detection delay or data gap, and the current pressure signal value is obtained accurately throughout the process.

[0029] S3, Force Determination Step: The control module reads the current pressure signal value, compares it with the preset pressure signal value, and determines the current clamping force level. It should be noted that the control module of the hair straightener 1000 reads the current pressure signal value transmitted by the clamping detection module in real time, retrieves the preset pressure signal value parameter data stored inside the hair straightener 1000, and accurately compares the real-time collected current pressure signal value with the preset pressure signal value. Based on the numerical matching relationship, it accurately classifies and determines the current clamping force level to complete the quantitative identification of the force state.

[0030] S4. Temperature control adjustment step: Based on the determined current clamping force level, the working temperature of the upper heating plate 30 and lower heating plate 40 of the hair straightener 1000 is adaptively adjusted by the control module so that the working temperature of the upper heating plate 30 and lower heating plate 40 of the hair straightener 1000 is maintained in the target temperature range corresponding to the clamping force level. The clamping force levels include at least: low clamping force level, medium clamping force level and high clamping force level; the low clamping force level corresponds to the high temperature range, the medium clamping force level corresponds to the medium temperature range, and the high clamping force level corresponds to the low temperature range.

[0031] Therefore, it is clear that the control module of the hair straightener 1000 described in this application can call the corresponding temperature control strategy according to the determined current clamping force level, so as to adaptively adjust the real-time working temperature of the upper heating plate 30 and the lower heating plate 40 of the hair straightener 1000, actively match the current clamping condition, and stably maintain the real-time working temperature of the upper heating plate 30 and the lower heating plate 40 of the hair straightener 1000 within the exclusive target temperature range of the corresponding force level, thereby achieving precise "force-temperature" adaptation.

[0032] In terms of specific implementation, this invention standardizes and grades the clamping conditions of the hair straightener 1000 used daily. The clamping force levels include at least three levels: low clamping force, medium clamping force, and high clamping force, covering all the force applied by the user in normal operation. Simultaneously, a reverse-adaptive temperature control logic is established to match the low clamping force level with the high temperature range, the medium clamping force level with the medium temperature range, and the high clamping force level with the low temperature range, thus achieving a fit to the physical characteristics of the hair strand under heat and pressure.

[0033] Clearly, after the above-described steps S1 to S4, the implementation of this application will have the following technical effects: On the one hand, through the factory pre-calibration process, the clamping force of the hair straightener 1000 is quantified and standardized, transforming the user's subjective and vague clamping force into detectable, comparable, and calculable electrical signal data. This effectively solves the pain points of traditional hair straighteners 1000, such as unknowable, uncontrollable, and unquantifiable clamping pressure. Furthermore, the construction of a three-dimensional mapping relationship table containing "clamping force level - preset pressure signal value - target temperature range" provides a precise data benchmark for subsequent real-time determination of hair clamping conditions and temperature adjustment. This ensures uniform temperature control accuracy for each hair straightener 1000, avoids temperature control deviations in individual products, and significantly improves the accuracy and stability of the hair straightener 1000's intelligent temperature control.

[0034] On the other hand, this application is the first to incorporate the core physical quantity of clamping force into the temperature control algorithm system of the hair straightener 1000, filling the technical gap of traditional hair straighteners 1000 that cannot quantify clamping force and the disconnect between temperature control and clamping conditions. By matching the clamping force to corresponding temperature ranges in different levels, it completely solves the drawback of traditional hair straighteners 1000 that rely on user experience, avoiding problems such as hair burns and straightening failures caused by improper force and temperature matching by novice users. It can significantly improve the ease of operation and fault tolerance of hair straightener 1000 and related products, while taking into account both the straightening effect and hair protection performance.

[0035] Furthermore, through the above-mentioned optimized design, the whole constituted by this application is highly practical and has a good effect in use.

[0036] Furthermore, in specific implementation, refer to Figure 2 As shown, according to an embodiment of the present invention, the pre-calibration step S1 specifically includes: S11. The control module of the hair straightener 1000 completes the whole machine self-test and zero-point calibration, so that the clamping detection module of the hair straightener 1000 is in the initial state of zero clamping. Specifically, to start the overall self-check program of the hair straightener 1000, the control module completes the overall function self-check of the hair straightener 1000 and the zero calibration of the clamping detection module, checks for software and hardware faults of modules including the control module and the clamping detection module, and resets the clamping detection module at the same time, so that it is in the zero-clamping initial state of no clamping and no pressure output.

[0037] S12, placing a standard hair bundle between the upper heating plate 30 and the lower heating plate 40 of the hair straightener 1000, and performing clamping tests by applying three clamping forces: small clamping force, medium clamping force and large clamping force respectively; In specific operation, a standard hair bundle of uniform specification is placed at the clamping center position between the upper heating plate 30 and the lower heating plate 40 of the hair straightener 1000 to ensure uniform force, three gradient clamping forces of small clamping force, medium clamping force and large clamping force are applied respectively to complete the clamping tests of three groups of working conditions in sequence, each group of tests can be repeated 3 to 5 times, and abnormal data are eliminated to ensure the stability of test data.

[0038] S13, recording the preset pressure signal values output by the clamping detection module under each clamping force, and establishing a mapping relationship table including the corresponding relationship of "clamping force level — preset pressure signal value — target temperature range"; In the mapping relationship table, the preset pressure signal value interval corresponding to the small clamping force level is defined as [V1,V2), the preset pressure signal value interval corresponding to the medium clamping force level is defined as [V2,V3), and the preset pressure signal value interval corresponding to the large clamping force level is defined as [V3,V4]; Wherein, V1, V2, V3 and V4 are all pressure signal critical thresholds preset by the control module of the hair straightener 1000, and satisfy 0<V1<V2<V3<V4; S14, storing the constructed mapping relationship table in the built-in memory of the control module.

[0039] In this regard, it should be noted that the preset pressure signal value interval corresponding to the small clamping force level, the preset pressure signal value interval corresponding to the medium clamping force level and the preset pressure signal value interval corresponding to the large clamping force level are all custom-set manually; Wherein, V1, V2, V3 and V4 are all manually settable pressure signal critical thresholds built in the control module, so as to strictly satisfy the numerical logic of 0<V1<V2<V3<V4, ensure that the pressure intervals of the three force levels have no overlap and no gap, cover all effective clamping working conditions of the hair straightener 1000, and finally store the constructed and verified mapping relationship table in the built-in memory of the control module, so as to ensure that the data of the hair straightener 1000 will not be lost after power off and can be called when the hair straightener is turned on.

[0040] Therefore, through steps S11 to S14, the hair straightener 1000 undergoes a refined calibration process involving self-testing, zero-point calibration, multiple gradient tests, and precise temperature range division. This process completely eliminates initial hardware errors and random testing errors, achieving precise quantitative segmentation of clamping force levels. Furthermore, by setting pressure ranges without overlap or gaps, it effectively avoids ambiguity, misjudgment, and missed judgments in subsequent force determination, greatly improving the accuracy of clamping force level recognition. Simultaneously, permanently storing the relevant data in the mapping table ensures that the hair straightener 1000 maintains a precise temperature control baseline even after long-term use, eliminating the need for repeated calibration and extending its lifespan and operational stability.

[0041] Furthermore, in specific implementation, refer to Figure 3 As shown, according to an embodiment of the present invention, the real-time detection step S2 specifically includes: S21. Fully open the upper heating plate 30 and lower heating plate 40 of the hair straightener 1000, keeping them in a non-clamped state, and reset the clamping detection module to the zero clamping initial state. Specifically, before each hair strand clamping test, the user first fully opens the upper heating plate 30 and lower heating plate 40 of the hair straightener 1000, keeping it in a completely unclamped and suspended state, triggering the clamping detection module to automatically reset, so that the clamping detection module returns to the initial zero clamping state, clearing the residual pressure data of the previous hair strand clamping, and avoiding historical data from interfering with the accuracy of the current test.

[0042] S22. The hair strand to be processed is clamped using the hair straightener 1000. The upper heating plate 30 and the lower heating plate 40 of the hair straightener 1000 are relatively displaced. The current pressure signal value V_cur output by the clamping detection module is collected in real time by the control module.

[0043] Therefore, it is clear that after the reset is completed in step S21, the user operates the hair straightener 1000 to clamp the hair bundle to be processed. The upper heating plate 30 and lower heating plate 40 of the hair straightener 1000 will undergo relative clamping displacement with the user's gripping action, facing each other to fit the hair bundle to be processed and generating clamping pressure. At this time, the control module can sample at a millisecond frequency and continuously collect the current pressure signal value V_cur output by the clamping detection module in real time, so as to dynamically capture the real-time changes in clamping force throughout the process and output real-time and accurate working condition data.

[0044] Clearly, by performing steps S21 and S22 and resetting the system before each test, the detection errors caused by residual historical working condition data can be effectively eliminated, ensuring that the data from each clamping test is real-time and accurate working condition data.

[0045] Furthermore, in specific implementation, refer to Figure 4 As shown, according to an embodiment of the present invention, the force determination step in step S3 specifically includes: S31. The control module reads the real-time acquired current pressure signal value V_cur; S32. Compare the read current pressure signal value V_cur with the preset pressure signal value range stored in the mapping table; S33. Based on the comparison results, determine whether the current clamping force level is low clamping force level, medium clamping force level or high clamping force level. If V_cur∈[V1,V2), then it is determined to be a low clamping force level; If V_cur∈[V2,V3), then it is determined to be of medium clamping force level; If V_cur∈[V3,V4], then it is determined to be a high clamping force level.

[0046] Therefore, it is clear that the control module described in this application is used to read the current pressure signal value V_cur obtained by high-frequency sampling in real time, retrieve the standard pressure signal value range parameters pre-stored in the memory, compare and match the current pressure signal value V_cur with the three preset pressure signal value ranges one by one, and automatically determine the current clamping force level according to the range belonging relationship.

[0047] In practice, when the current pressure signal value V_cur ∈ [V1, V2), the current clamping condition is determined to be a low clamping force level; when the current pressure signal value V_cur ∈ [V2, V3), the current clamping condition is determined to be a medium clamping force level; and when the current pressure signal value V_cur ∈ [V3, V4], the current clamping condition is determined to be a high clamping force level. The relevant operations are automatically calculated and compared by the control module throughout the entire process, without manual intervention, and the determination result can be output in real time.

[0048] To address this, this application employs a standardized numerical range comparison and judgment logic to automate, accurately, and without deviation the determination of clamping force levels. This completely replaces the traditional method of judging clamping force based on subjective manual feel, resolving the problem of inconsistent condition judgment caused by differences in grip strength among different users. The judgment logic of this application is clear, unambiguous, and error-free, with a fast response speed, capable of instantaneous level identification. This provides immediate and accurate operating condition data for subsequent temperature control adjustments, ensuring a better match between temperature control strategies and real-time clamping conditions.

[0049] Furthermore, in this technical solution, reference is made to Figure 5 As shown, according to an embodiment of the present invention, the temperature control adjustment step S4 specifically includes: S41. Based on the determined current clamping force level, the corresponding target temperature range is retrieved from the mapping table by the control module; S42. The upper heating plate 30 and lower heating plate 40 of the hair straightener 1000 are driven to heat up through the control module, and their actual working temperature is monitored in real time. S43. When the actual operating temperature reaches the target temperature range, maintain it within the target temperature range. After the above-described steps S41 to S43, it is clear that after the control module of this application completes the determination of the current clamping force level, it will immediately retrieve the exclusive target temperature range corresponding to the clamping force level from the pre-stored mapping relationship table according to the determination result, lock the standard temperature control range of the current working condition, and then the control module outputs a drive signal to control the upper heating plate 30 and lower heating plate 40 of the hair straightener 1000 to start heating. At the same time, the onboard temperature sensors of the upper heating plate 30 and lower heating plate 40 of the hair straightener 1000 are used to monitor their actual working temperature in real time and provide high-frequency feedback of their actual working temperature data.

[0050] When the actual working temperature of the upper heating plate 30 and lower heating plate 40 of the hair straightener 1000 is detected to rise to the corresponding target temperature range, the control module will start the constant temperature regulation logic, adjust the heating power through pulse width modulation and other methods, dynamically compensate for temperature loss, and continuously and stably maintain the working temperature of the upper heating plate 30 and lower heating plate 40 of the hair straightener 1000 within the target temperature range until the current clamping and straightening operation is completed.

[0051] In this way, even though this step achieves the fully automatic temperature control logic of "working condition determination - temperature matching - constant temperature maintenance", it can accurately match the optimal working temperature of the upper heating plate 30 and lower heating plate 40 of the hair straightener 1000 according to different clamping force levels, which can better solve the drawbacks of the fixed temperature operation of the traditional hair straightener 1000.

[0052] In practice, applying high temperature with light clamping force ensures that the hair strands are fully heated and shaped under slight clamping, avoiding styling failure; applying medium temperature with medium clamping force achieves balanced shaping and hair care effects; applying low temperature with heavy clamping force avoids high temperature burns and hair breakage under high pressure and strong clamping. In this way, the implementation of this application can be fully adapted to different usage conditions, greatly improve the straight hair styling effect, and effectively reduce hair damage and other problems.

[0053] Furthermore, in this application, reference is made to Figure 7 and Figure 14 As shown, according to an embodiment of the present invention, the hair straightener 1000 is provided with an upper clamping arm 10 and a lower clamping arm 20 disposed opposite to each other; The upper heating plate 30 is installed at the lower front part of the upper clamping arm 10, and an upper floating elastic element 70 is provided between its upper end surface and the lower bottom surface of the upper clamping arm 10; the lower heating plate 40 is installed at the upper front part of the lower clamping arm 20, and a lower floating elastic element 80 is provided between its lower bottom surface and the upper surface of the lower clamping arm 20. When the hair straightener 1000 uses the upper heating plate 30 and lower heating plate 40 to clamp the hair bundle to be processed, the clamping force of the hair bundle to be processed is adjustable under the elastic deformation of the upper floating elastic member 70 and the lower floating elastic member 80.

[0054] Thus, by providing the upper floating elastic element 70 between the upper end surface of the upper heating plate 30 and the lower bottom surface of the upper clamping arm 10, and by providing the lower floating elastic element 80 between the lower bottom surface of the lower heating plate 40 and the upper surface of the lower clamping arm 20, this application enables the clamping force of the hair bundle to vary when using the upper heating plate 30 and the lower heating plate 40 to clamp the hair bundle. In this way, the current pressure signal value of the hair bundle under clamping state can be collected in real time by the clamping detection module and compared with the preset pressure signal value to determine whether the current clamping force level is small, medium, or large.

[0055] In this preferred embodiment, both the upper floating elastic element 70 and the lower floating elastic element 80 are preferably high-elasticity telescopic springs, so that they have good elastic deformation capability and reset performance. When the user operates the upper clamping arm 10 and the lower clamping arm 20 of the hair straightener 1000, and the hair to be processed is clamped by the upper heating plate 30 and the lower heating plate 40 of the hair straightener 1000, the upper floating elastic element 70 and the lower floating elastic element 80 will produce different degrees of elastic compression deformation as the user's gripping force changes. This allows the clamping distance of the upper heating plate 30 and the lower heating plate 40 of the hair straightener 1000 to be adaptively and finely adjusted, so that the clamping force of the hair to be processed can be infinitely adjusted to adapt to different user gripping habits and operating force.

[0056] Furthermore, by adding the upper floating elastic element 70 and the lower floating elastic element 80, the hair straightener 1000 possesses elastic buffering and adaptive force adjustment capabilities, avoiding sudden force changes and concentrated clamping pressure caused by rigid clamping, resulting in smoother changes in clamping force. Simultaneously, the displacement difference generated by elastic deformation provides a stable and identifiable detection variable for the clamping detection module, ensuring the continuity of pressure signal acquisition, providing hardware structural support for force quantification detection, and improving the user's grip comfort.

[0057] Furthermore, in specific implementation, we will continue to refer to Figure 7 As shown, according to an embodiment of the present invention, the clamping detection module includes a linear Hall sensor 50 and a cooperating magnet 60 disposed opposite to the upper clamping arm 10 and the lower clamping arm 20 of the hair straightener 1000. When the upper heating plate 30 and the lower heating plate 40 of the hair straightener 1000 undergo relative clamping displacement, the distance between the linear Hall sensor 50 and the magnet 60 changes synchronously, causing the output voltage of the linear Hall sensor 50 to change linearly; the preset pressure signal value and the current pressure signal value are both the output voltage values ​​of the linear Hall sensor 50.

[0058] It should be noted that during the operation of the hair straightener 1000 described in this application, when the upper heating plate 30 and the lower heating plate 40 move towards each other, the upper clamping arm 10 and the lower clamping arm 20 move synchronously, causing the relative distance between the linear Hall sensor 50 and the magnet 60 to decrease synchronously; when the upper heating plate 30 and the lower heating plate 40 open, the relative distance between the linear Hall sensor 50 and the magnet 60 increases synchronously. Based on the operating characteristics of the linear Hall sensor 50, the change in its distance from the magnet 60 directly changes the intensity of the induced magnetic field, causing the output voltage of the linear Hall sensor 50 to exhibit a precise linear change trend.

[0059] In this invention, the preset pressure signal value in the pre-calibration step and the current pressure signal value in the real-time detection step both use the voltage value output by the linear Hall sensor 50 as the core detection data to achieve accurate conversion between displacement, pressure and voltage.

[0060] Preferably, in this technical solution, according to an embodiment of the present invention, the high temperature range is set to [180℃, 200℃], the medium temperature range is set to [160℃, 180℃], and the low temperature range is set to [140℃, 160℃].

[0061] It should be noted that, combining the temperature tolerance of human hair with the optimal temperature characteristics for hair strand thermoforming, this invention precisely defines the target temperature range corresponding to each clamping force level. The specific parameter standards are as follows: the high temperature range corresponding to the low clamping force level is set to [180℃, 200℃], the medium temperature range corresponding to the medium clamping force level is set to [160℃, 180℃), and the low temperature range corresponding to the high clamping force level is set to [140℃, 160℃]. The above temperature ranges are referenced from the general temperature ranges of the low, medium, and high settings of a conventional hair straightener 1000, and have been verified through extensive hair quality testing, which can adapt to the straightening and shaping needs of most ordinary people's hair.

[0062] In some embodiments, the following approach may be adopted: When the user's hair is clamped with a small force, the hair is subjected to a large gap under pressure and the heat conduction is slow. The high temperature in the [180℃, 200℃] temperature range can quickly soften the hair cuticles and ensure the straightening and shaping effect. At this time, the high temperature of 190℃ can be set to quickly soften the user's hair.

[0063] When clamping the user's hair strands with medium force, the medium temperature range of [160℃, 180℃] can balance shaping efficiency and hair protection; at this time, the medium temperature of 170℃ can be set to shape the user's hair strands.

[0064] When the user's hair is clamped tightly with great force, the hair strands are pressed tightly and the heat conduction is fast. The low temperature range of [140℃, 160℃] can effectively avoid the hair strands from drying out, splitting and burning caused by high temperature and high pressure, and achieve the optimal balance between shaping and hair care. At this time, the user's hair strands can be set to a low temperature of 150℃ for low-temperature hair care.

[0065] Of course, in all the above embodiments, the low temperature range [140℃, 160℃), the medium temperature range [160℃, 180℃), and the high temperature range [180℃, 200℃] may not be set to the temperature parameters of the corresponding range ranges, and the relevant temperature parameters may also be set to other values, which will not be illustrated here.

[0066] Meanwhile, as a preferred option, refer to Figure 6 As shown, according to one embodiment of the present invention, after the temperature control adjustment step S4, a dynamic temperature adjustment step S5 is further included: S5. During the process of straightening the hair strand to be treated using the hair straightener 1000, if the clamping force of the hair straightener 1000 changes, the control module will repeat steps S2-S4 in a loop to dynamically adjust the temperature of the clamped hair strand to be treated.

[0067] In step S5 described above, the control module monitors the output signal of the clamping detection module in real time throughout the process, continuously capturing the dynamic changes in the clamping force of the upper heating plate 30 and the lower heating plate 40 on the hair strand. When fluctuations such as an increase or decrease in the clamping force of the hair straightener 1000 are detected, the system will immediately and automatically repeat the real-time detection step, the force determination step, and the temperature control adjustment step to re-acquire the real-time pressure signal, update the force level determination result, and adaptively match and adjust the working temperature of the upper heating plate 30 and the lower heating plate 40, realizing dynamic, closed-loop intelligent temperature control throughout the hair straightening process until a single hair straightening operation is completed.

[0068] Clearly, this application employs a dynamic, cyclical temperature control logic, which can adapt to the random fluctuations in the user's grip strength during hair straightening. This effectively addresses the shortcomings of traditional hair straighteners that operate at a fixed temperature and cannot adapt to dynamic conditions. The real-time iterative temperature control strategy throughout the straightening process ensures that the temperature consistently matches the real-time clamping force, preventing uneven shaping and localized burns caused by mismatched working conditions and temperatures. This results in a more uniform straightening effect and less hair damage, further enhancing the intelligence and user experience of the hair straightener 1000.

[0069] It should be further explained that, in specific implementation, when the S pole of the magnet 60 is assembled towards the linear Hall sensor 50, and the upper heating plate 30 and lower heating plate 40 of the hair straightener 1000 are fully open to maintain a non-clamped state, so that the clamping detection module is reset to the initial zero-clamping state, the magnetic flux sensed by the linear Hall sensor 50 is almost zero. At this time, the output voltage of the linear Hall effect sensor is set to 2.5V. When the upper heating plate 30 and lower heating plate 40 of the hair straightener 1000 are fully closed in opposite directions to maintain the maximum clamping force, the magnetic flux sensed by the linear Hall sensor 50 is at its maximum. At this time, the output voltage of the linear Hall sensor 50 is set to 4.0V. Therefore, in this embodiment, when the upper heating plate 30 and the lower heating plate 40 of the hair straightener 1000 are closed, as the clamping force gradually increases, the linear Hall sensor 50 and the magnet 60 will gradually move closer. At this time, the output voltage value of the linear Hall sensor 50 will change between 2.5V and 4V. The closer the distance, the higher the voltage.

[0070] Therefore, in this technical solution, it is preferred to set V1=2.5V, V2=3.0V, V3=3.5V, and V4=4.0V.

[0071] Correspondingly, in practical operation, the operating principle of the hair straightener 1000 described in this application is as follows: In some embodiments, comparison Figure 8 , Figure 9 and Figure 14 As shown, when the upper clamping arm 10 and the lower clamping arm 20 are closed, Figure 14 The upper floating elastic element 70 and the lower floating elastic element 80 will undergo elastic deformation under the action of clamping force. When the current pressure signal value V_cur∈[2.5,3.0), it is determined that the current clamping condition is a small clamping force level. At this time, the upper floating elastic element 70 and the lower floating elastic element 80 have a small degree of elastic deformation, so that the distance L1 between the upper clamping arm 10 and the lower clamping arm 20 at the position of the linear Hall sensor 50 and the magnet 60 is about 4.0mm, and there is a large gap between the upper clamping arm 10 and the lower clamping arm 20.

[0072] In some embodiments, comparison Figure 10 , Figure 11 and Figure 14 As shown, when the upper clamping arm 10 and the lower clamping arm 20 are closed, Figure 14 The upper floating elastic element 70 and the lower floating elastic element 80 will also undergo elastic deformation under the action of clamping force; when the current pressure signal value V_cur∈[3.0,3.5), it is determined that the current clamping condition is a medium clamping force level. At this time, the upper floating elastic element 70 and the lower floating elastic element 80 have a moderate degree of elastic deformation, so that the distance L2 between the upper clamping arm 10 and the lower clamping arm 20 at the position of the linear Hall sensor 50 and the magnet 60 is about 2.0mm, and there is a moderate gap between the upper clamping arm 10 and the lower clamping arm 20.

[0073] In some embodiments, comparison Figure 12 , Figure 13 and Figure 14 As shown, when the upper clamping arm 10 and the lower clamping arm 20 are closed, Figure 14 The upper floating elastic element 70 and the lower floating elastic element 80 will also undergo elastic deformation under the action of clamping force. When the current pressure signal value V_cur∈[3.5,4.0], it is determined that the current clamping condition is a high clamping force level. At this time, the upper floating elastic element 70 and the lower floating elastic element 80 have a large degree of elastic deformation, so that the distance L3 between the upper clamping arm 10 and the lower clamping arm 20 at the position of the linear Hall sensor 50 and the magnet 60 is about 0.0mm. At this time, there is a small gap between the upper clamping arm 10 and the lower clamping arm 20.

[0074] It should be further noted that, in specific implementation, the clamping detection module may also be a resistance strain gauge, a piezoresistive pressure sensor, a piezoelectric pressure sensor, a capacitive pressure sensor, a fiber optic sensor, a vision sensor, an infrared sensor, or an ultrasonic sensor, and all of them are arranged on the clamping drive path of the upper heating plate 30 and the lower heating plate 40, and are used to detect the relative clamping displacement between the upper heating plate 30 and the lower heating plate 40, and output a detection signal characterizing the real-time clamping pressure based on the relative clamping displacement; The control module is used to adaptively adjust the operating temperature of the upper heating plate 30 and the lower heating plate 40 according to the magnitude of the detection signal. The detection signal is positively correlated with the clamping pressure, and the operating temperature decreases as the detection signal increases.

[0075] When the clamping detection module is a resistance strain gauge, piezoresistive pressure sensor, piezoelectric pressure sensor, capacitive pressure sensor, fiber optic sensor, vision sensor, infrared sensor, or ultrasonic sensor, the hair straightener temperature control method based on clamping degree detection described above can still achieve the same technical effect, and will not be elaborated here.

[0076] Other embodiments, etc., will not be described here either.

[0077] In summary, the hair straightener temperature control method based on clamping force detection provided in this application, when implemented, ensures that the hair strands are fully heated and shaped under slight clamping force by applying high temperature, thus avoiding styling failure; it achieves balanced shaping and hair care by applying medium temperature with medium clamping force; and it avoids hair burns and breakage caused by high temperature under high pressure clamping force. Thus, the implementation of this application can be fully adapted to different usage conditions, significantly improve the straightening effect, and effectively reduce hair damage and other problems.

[0078] Furthermore, the hair straightener temperature control method based on clamping degree detection provided in this application is indeed highly practical and has excellent performance, which makes this application inherently valuable for market promotion and will certainly be very popular and widely adopted.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for temperature control of a hair straightener based on clamping degree detection, characterized in that, Includes the following steps: Real-time detection steps: Use a hair straightener to clamp the hair bundle to be processed, and collect the current pressure signal value of the hair bundle under clamping status in real time through the clamping detection module of the hair straightener; Force determination step: The current pressure signal value is read by the control module of the hair straightener, and compared with the preset pressure signal value to determine the current clamping force level; Temperature control adjustment steps; Based on the determined current clamping force level, the control module adaptively adjusts the working temperature of the upper and lower heating plates of the hair straightener so that the working temperature of the upper and lower heating plates of the hair straightener is maintained within the target temperature range corresponding to the clamping force level. The clamping force levels include at least: low clamping force level, medium clamping force level and high clamping force level; the low clamping force level corresponds to the high temperature range, the medium clamping force level corresponds to the medium temperature range, and the high clamping force level corresponds to the low temperature range.

2. The hair straightener temperature control method based on clamping degree detection according to claim 1, characterized in that, Before the real-time detection step, the following steps are also included: Pre-calibration steps: Place a standard hair strand between the upper and lower heating plates of the hair straightener and perform clamping tests with different clamping forces. Record the preset pressure signal value of the clamping detection module corresponding to each level of clamping force, establish a mapping relationship table containing "clamping force level - preset pressure signal value - target temperature range", and store the mapping relationship table in the control module of the hair straightener.

3. The hair straightener temperature control method based on clamping degree detection according to claim 2, characterized in that, The pre-calibration step specifically includes: The control module of the hair straightener completes the whole machine self-test and zero-point calibration, so that the clamping detection module of the hair straightener is in the initial state of zero clamping. A standard hair strand was placed between the upper and lower heating plates of the hair straightener, and clamping tests were conducted by applying small clamping force, medium clamping force, and large clamping force respectively. Record the preset pressure signal value output by the clamping detection module under each clamping force, and establish a mapping table containing the correspondence between "clamping force level - preset pressure signal value - target temperature range"; In the mapping table, the preset pressure signal value range corresponding to the small clamping force level is defined as [V1, V2), the preset pressure signal value range corresponding to the medium clamping force level is defined as [V2, V3), and the preset pressure signal value range corresponding to the large clamping force level is defined as [V3, V4]. Wherein, V1, V2, V3, and V4 are all pressure signal critical thresholds preset by the control module of the hair straightener, and satisfy 0 <V1<V2<V3<V4; The completed mapping table is stored in the built-in memory of the control module.

4. The hair straightener temperature control method based on clamping degree detection according to claim 3, characterized in that, The real-time detection steps specifically include: Fully open the upper and lower heating plates of the hair straightener, keeping it in an unclamped state, and reset the clamping detection module to the initial state of zero clamping. The hair straightener is used to clamp the hair strand to be processed. The upper heating plate and the lower heating plate of the straightener are relatively displaced. The control module collects the current pressure signal value V_cur output by the clamping detection module in real time.

5. The hair straightener temperature control method based on clamping degree detection according to claim 4, characterized in that, The force determination step specifically includes: The control module reads the real-time acquired current pressure signal value V_cur. The current pressure signal value V_cur is read and compared with the preset pressure signal value range stored in the mapping table. Based on the comparison results, the current clamping force level is determined to be low clamping force level, medium clamping force level, or high clamping force level; If V_cur∈[V1,V2), then it is determined to be a low clamping force level; If V_cur∈[V2,V3), then it is determined to be of medium clamping force level; If V_cur∈[V3,V4], then it is determined to be a high clamping force level.

6. The hair straightener temperature control method based on clamping degree detection according to claim 5, characterized in that, The temperature control adjustment steps specifically include: Based on the determined current clamping force level, the control module retrieves the corresponding target temperature range from the mapping table; The control module drives the upper and lower heating plates of the hair straightener to heat up and monitors their actual operating temperature in real time. Once the actual operating temperature reaches the target temperature range, it will be maintained within the target temperature range.

7. The hair straightener temperature control method based on clamping degree detection according to claim 1, characterized in that, The hair straightener is equipped with an upper clamp arm and a lower clamp arm that are arranged opposite to each other; The upper heating plate is installed at the lower front part of the upper clamping arm, and an upper floating elastic element is provided between its upper end surface and the lower bottom surface of the upper clamping arm; the lower heating plate is installed at the upper front part of the lower clamping arm, and a lower floating elastic element is provided between its lower bottom surface and the upper surface of the lower clamping arm. When the upper and lower heating plates of the hair straightener are used to clamp the hair bundle to be processed, the clamping force of the hair bundle to be processed is adjustable under the elastic deformation of the upper and lower floating elastic elements.

8. The hair straightener temperature control method based on clamping degree detection according to claim 7, characterized in that, The clamping detection module includes linear Hall sensors and corresponding magnets disposed opposite to the upper and lower clamping arms of the hair straightener. When the upper and lower heating plates of the hair straightener undergo relative clamping displacement, the distance between the linear Hall sensor and the magnet changes synchronously, causing the output voltage of the linear Hall sensor to change linearly; the preset pressure signal value and the current pressure signal value are both the output voltage values ​​of the linear Hall sensor.

9. The hair straightener temperature control method based on clamping degree detection according to claim 1, characterized in that, The high temperature range is set to [180℃, 200℃], the medium temperature range is set to [160℃, 180℃], and the low temperature range is set to [140℃, 160℃].

10. The hair straightener temperature control method based on clamping degree detection according to claim 1, characterized in that, Following the temperature control adjustment step, a dynamic temperature adjustment step is also included: During the process of straightening the hair strands to be treated using the hair straightener, if the clamping force of the hair straightener changes, the control module will repeatedly perform the real-time detection step, the force determination step, and the temperature control adjustment step to dynamically adjust the temperature of the clamped hair strands to be treated.

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