A water pressure intelligent adaptation method and system for a water flosser

Abstract

This invention relates to the field of biosensor technology, and discloses a method and system for intelligent water pressure adaptation of a water flosser based on integrated sensing. The method includes: determining the cleaning area of ​​the target oral cavity for the water flosser; analyzing the health of the cleaning area based on gingival tissue state data, and analyzing the cleaning needs of the cleaning area based on oral pressure data; combining health and cleaning needs, and analyzing the initial water pressure value of the cleaning area using a preset area-state-water pressure mapping model; collecting the subconscious physiological reaction signals of the oral cavity user corresponding to the initial water pressure value, and analyzing the comfort coefficient of the oral cavity user based on the subconscious physiological reaction signals; optimizing the initial water pressure value based on the comfort coefficient to obtain a target water pressure value, and performing intelligent water pressure adaptation of the water flosser to the target oral cavity based on the target water pressure value. This invention can improve the cleaning effect for oral cavity users.

Description

Technical Field

[0001] This invention relates to a method and system for intelligent water pressure adaptation of a dental flosser that integrates sensing, belonging to the field of biosensing technology. Background Technology

[0002] Intelligent water pressure adaptation in oral irrigators refers to the system's ability to dynamically and precisely adjust the pressure of each water stream by using built-in sensors to monitor the user's oral environment and operating habits in real time, combined with the monitoring of the user's subconscious physiological responses. Its core function is to completely eliminate the limitations of fixed water pressure settings. While ensuring efficient removal of plaque and food debris, it proactively avoids sensitive or inflamed areas, providing users with a truly personalized, safe, and extremely comfortable teeth cleaning experience. This effectively prevents gum damage caused by improper water pressure, elevating daily oral hygiene to a form of intelligent and precise health management.

[0003] Traditional water flossers rely on users manually selecting water pressure based on their personal feelings. This method cannot detect the different needs of different areas in the mouth (such as healthy molars and sensitive gum lines) in real time, nor can it perceive the subconscious physiological discomfort of users during the cleaning process, resulting in poor cleaning effect. Summary of the Invention

[0004] This invention provides a method and system for intelligent water pressure adaptation of oral irrigators with integrated sensing, the main purpose of which is to improve the cleaning effect for oral hygiene users.

[0005] To achieve the above objectives, the present invention provides a water pressure intelligent adaptation method for a dental flosser based on integrated sensing, comprising:

[0006] The oral pressure data, gingival tissue status data, and user operation posture data of the oral irrigator are acquired to determine the cleaning area of ​​the oral cavity targeted by the oral irrigator. Based on the gingival tissue status data, the health of the cleaning area is analyzed; based on the oral pressure data, the cleaning needs of the cleaning area are analyzed. Combining the health status and the cleaning requirements, the initial water pressure value of the cleaning area is analyzed using a preset area-state-water pressure mapping model; The subconscious physiological response signals of the oral cavity corresponding to the target oral cavity under the initial water pressure value are collected, and the comfort coefficient of the oral cavity user is analyzed based on the subconscious physiological response signals. The initial water pressure value is optimized based on the comfort factor to obtain a target water pressure value, and intelligent water pressure adaptation of the oral irrigator is performed based on the target water pressure value to clean the target oral cavity.

[0007] Optionally, calculating the blood oxygen saturation and tissue perfusion index of the clean area based on the absorbance includes: The absorbance is decomposed into AC and DC components; Define the signal quality weight and tissue background weight of the clean area; Based on the AC component, the DC component, the signal quality weight, and the tissue background weight, the R value of the clean area is calculated using the following formula:

[0008] in, The R value represents the area to be cleaned. Indicates signal quality weights, This represents the AC component at a wavelength of 660 nanometers. Indicates in AC component at nanometer wavelengths Indicates organizational background weight. Indicates in DC component at nanometer wavelengths Indicates in DC component at nanometer wavelengths; The blood oxygen saturation of the clean area is determined based on the R value; The PI value of the clean area is calculated based on the AC component and the DC component to determine the tissue perfusion index of the clean area.

[0009] Optionally, determining the cleaning area of ​​the target oral cavity by the water flosser based on the user's operating posture data includes: Based on the user's operating posture data corresponding to the water flosser, the three-dimensional posture angle of the water flosser is analyzed. Establish the oral cavity zone coordinate system of the target oral cavity; Based on the three-dimensional attitude angle, the macroscopic area of ​​the oral cavity targeted by the water flosser for cleaning is determined in the oral cavity partition coordinate system; The microscopic characterization of the macroscopic region is identified by using the gingival tissue state data and oral pressure data corresponding to the oral irrigator. Based on the aforementioned microscopic characterization, the cleaning area of ​​the target oral cavity by the oral irrigator is determined.

[0010] Optionally, analyzing the cleaning needs of the cleaning area based on the oral pressure data includes: Based on the oral pressure data, the instantaneous pressure value and pressure change rate of the cleaned area are analyzed; Define the pressure threshold range of the cleaning area, and combine the instantaneous pressure value and the pressure threshold range to determine the force level of the cleaning area; By combining the instantaneous pressure value and pressure change rate, the operational intent of the user applying force to the corresponding cleaning area is analyzed; The cleaning requirements of the cleaning area are determined based on the applied force level and the operational intent.

[0011] Optionally, the step of combining the instantaneous pressure value and the pressure change rate to analyze the operational intent of the user applying force to the cleaning area includes: Define the basic operational intent for the cleaned area; Define the characteristic patterns of the basic operational intent; Based on the characteristic pattern, the instantaneous pressure value, and the pressure change rate, the initial intention of the force-applying user is determined; The initial intent is validated by a window to obtain a window validation result. When the window validation result meets the preset window validation criteria, the initial intent is taken as the operation intent of the force-applying user.

[0012] Optionally, the step of combining the health status and the cleaning requirements, and using a preset area-state-water pressure mapping model to analyze the initial water pressure value of the cleaning area, includes: The health status and the cleaning requirements are quantified to obtain quantified health status and quantified cleaning requirements. Combining the health status and the cleaning requirements, the baseline water pressure of the cleaning area is analyzed using a pre-defined area-state-water pressure mapping model; Based on the baseline water pressure, the quantitative health status, and the quantitative cleaning requirements, calculate the weighted baseline water pressure value of the cleaning area; Define the safety boundaries of the clean area; Based on the safety boundary, the weighted basic water pressure value is optimized to obtain the initial water pressure of the clean area.

[0013] Optionally, the step of combining the surface defects and analyzing the user's comfort level based on the subconscious physiological response signals includes: The subconscious physiological response signals were divided into EMG signals, GSR signals, and PPG signals; The root mean square value of the EMG signal is calculated to analyze the pain discomfort of the oral hygiene user. Calculate the peak amplitude of the GSR signal to analyze the startle aversion of the oral hygiene user; Calculate the instantaneous heart rate of the PPG signal to analyze heart rate arrhythmia in the oral hygiene user; The comfort level of the oral hygiene user was analyzed by combining the aforementioned pain discomfort, fright discomfort, and heart rate discomfort.

[0014] Optionally, the analysis of the oral hygiene user's heart rate arrhythmia includes: Based on the instantaneous heart rate of the oral hygiene user, the standard deviation of the RR interval of the oral hygiene user was analyzed; Define the resting heart rate baseline for the oral hygiene user; Based on the standard deviation of the RR interval and the baseline resting heart rate, the heart rate discomfort of the oral hygiene user is calculated using the following formula:

[0015] in, This indicates that the user's heart rate is not appropriate during oral hygiene. This indicates the instantaneous heart rate of the user undergoing oral hygiene procedures. This represents the baseline resting heart rate of users who perform oral hygiene procedures. This indicates the weighting of heart rate deviation among users who undergo oral hygiene procedures. This represents the standard deviation of the RR interval for oral hygiene users. Represents extremely small positive numbers. This represents the weighting of heart rate variability.

[0016] To address the aforementioned problems, the present invention also provides a water pressure intelligent adaptation system for a dental flosser that integrates sensing, the system comprising: The cleaning area determination module is used to acquire oral pressure data, gingival tissue status data, and user operation posture data of the water flosser in order to determine the cleaning area of ​​the target oral cavity by the water flosser. The cleaning needs calculation module is used to analyze the health of the cleaning area based on the gingival tissue status data, and to analyze the cleaning needs of the cleaning area based on the oral pressure data. The initial water pressure analysis module is used to analyze the initial water pressure value of the cleaning area by combining the health status and the cleaning requirements and using a preset area-state-water pressure mapping model. The comfort coefficient analysis module is used to collect the subconscious physiological reaction signals of the oral cavity corresponding to the target oral cavity under the initial water pressure value, and to analyze the comfort coefficient of the oral cavity user based on the subconscious physiological reaction signals. The water pressure intelligent adaptation module is used to optimize the initial water pressure value based on the comfort coefficient to obtain a target water pressure value, and to perform intelligent water pressure adaptation of the oral irrigator for cleaning the target oral cavity based on the target water pressure value.

[0017] First, by integrating multi-dimensional data such as oral pressure, gum tissue condition, and user posture, the system can accurately identify the differentiated health and cleaning needs of different oral regions, thereby generating an initial water pressure value. This completely changes the traditional one-size-fits-all approach of oral irrigators, laying a scientific foundation for efficient and safe cleaning. More importantly, this invention innovatively introduces the monitoring and comfort coefficient analysis of the user's subconscious physiological response signals, constructing a unique physiological feedback loop. This makes the oral irrigator no longer a one-way output, but can perceive the user's most realistic physical sensations in real time and dynamically optimize water pressure. Thus, while ensuring cleaning effectiveness, it improves user comfort and safety, effectively avoiding problems such as gum damage and bleeding caused by excessive water pressure or individual differences. Therefore, this invention can improve the cleaning effect for oral hygiene users. Attached Figure Description

[0018] Figure 1 This is a flowchart illustrating a method for intelligent water pressure adaptation of a dental flosser based on fused sensing, according to an embodiment of the present invention. Figure 2 This is a schematic diagram of a module for implementing the intelligent water pressure adaptation method for a water flosser based on fusion sensing, according to an embodiment of the present invention.

[0019] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0021] This application provides a method for intelligent adaptation of water pressure in a water flosser using fusion sensing. The executing entity of this method includes, but is not limited to, at least one electronic device that can be configured to execute the method provided in this application, such as a server or a terminal. In other words, the method can be executed by software or hardware installed on a terminal device or a server device. The server includes, but is not limited to, a single server, a server cluster, a cloud server, or a cloud server cluster.

[0022] Reference Figure 1 The diagram shown is a flowchart illustrating a method for intelligent water pressure adaptation of a water flosser based on fusion sensing, according to an embodiment of the present invention. In this embodiment, the method includes: S1. Acquire oral pressure data, gingival tissue status data, and user operation posture data of the oral irrigator to determine the cleaning area of ​​the oral cavity targeted by the oral irrigator.

[0023] It should be explained that the oral irrigator refers to an intelligent oral cleaning device that integrates a microprocessor, a multimodal sensor array, a water pump drive module, and a wireless communication module. The oral pressure data refers to a data stream reflecting the interaction force between water flow and teeth and gum tissue, collected by a miniature pressure sensor array integrated near the nozzle or water outlet of the oral irrigator. The gum tissue state data refers to the initial photoelectric data directly generated by a near-infrared spectral sensor integrated in the nozzle of the oral irrigator, without any algorithmic processing. The sensor can be a near-infrared spectral sensor. The user operation posture data refers to data describing the motion state and orientation of the nozzle in three-dimensional space, collected by an inertial measurement unit integrated in the handle of the oral irrigator.

[0024] Based on the user's operating posture data, this invention determines the cleaning area of ​​the oral cavity by the water flosser and dynamically determines the precise position of the water flosser nozzle in the complex oral environment, providing a solid and reliable position information foundation for subsequent intelligent water pressure adaptation.

[0025] Specifically, determining the cleaning area of ​​the oral cavity by the water flosser based on the user's operating posture data includes: Based on the user's operating posture data corresponding to the water flosser, the three-dimensional posture angle of the water flosser is analyzed. Establish the oral cavity zone coordinate system of the target oral cavity; Based on the three-dimensional attitude angle, the macroscopic area of ​​the oral cavity targeted by the water flosser for cleaning is determined in the oral cavity partition coordinate system; The microscopic characterization of the macroscopic region is identified by the gingival tissue state data and oral pressure data corresponding to the oral irrigator. Based on the aforementioned microscopic characterization, the cleaning area of ​​the target oral cavity by the oral irrigator is determined.

[0026] The three-dimensional attitude angle refers to the orientation information of the water flosser nozzle relative to the direction of the Earth's gravitational field in three-dimensional space, calculated in real time by the inertial measurement unit built into the water flosser. The oral cavity partition coordinate system refers to a standardized three-dimensional spatial reference model established to simulate and map the user's real oral cavity structure at the software level. The macroscopic region refers to the oral cavity partition with a large spatial range defined in the oral cavity partition coordinate system. The microscopic representation refers to the unique information that reflects the specific physiological and physical characteristics of the determined macroscopic region by analyzing gingival tissue state data and oral pressure data, such as pressure fluctuation characteristics and tissue physiological characteristics. The cleaning area refers to the smallest oral cavity unit with clear functional attributes that the water flosser nozzle is cleaning, as finally determined by the system, such as the gap between the left canine and the first premolar in the upper jaw, or the gingival line of the anterior incisors in the lower jaw.

[0027] Optionally, the establishment of the oral cavity partition coordinate system for the target oral cavity divides the entire oral cavity into several logical macroscopic blocks and assigns a unique spatial orientation identifier to each block. For example, the coordinate system can define the origin at the midpoint of the incisors, the X-axis representing the left-right direction, the Y-axis representing the up-down direction, and the Z-axis representing the inside-out direction, thereby dividing the oral cavity space into macroscopic regions such as "left side of the upper jaw", "front of the upper jaw", "right side of the upper jaw", "left side of the lower jaw", "front of the lower jaw", and "right side of the lower jaw".

[0028] S2. Based on the gingival tissue status data, analyze the health of the cleaning area; based on the oral pressure data, analyze the cleaning needs of the cleaning area.

[0029] Based on the gum tissue state data, this invention analyzes the health of the cleaned area and transforms abstract spectral signals into a precise assessment of gum health in a scientific and objective manner, providing a solid data foundation for water flossers to achieve intelligent cleaning.

[0030] In detail, the analysis of the health of the cleaned area based on the gingival tissue status data includes: The gingival tissue state data is preprocessed to obtain a processed spectral signal; By processing the spectral signal, the differences in light absorption and absorbance of the clean area at a specific wavelength are analyzed; Based on the difference in light absorption, the hemoglobin concentration index of the clean area is calculated; Based on the absorbance, calculate the blood oxygen saturation and tissue perfusion index of the clean area; The health status of the clean area is analyzed by combining the hemoglobin concentration index, the blood oxygen saturation, and the tissue perfusion index.

[0031] The processed spectral signal refers to the pure spectral data obtained after a series of preprocessing steps on the gingival tissue state data, which can be used for physiological parameter analysis. The specific wavelength refers to a monochromatic light wavelength with clear optical characteristics carefully selected for accurate assessment of specific physiological parameters of gingival tissue. In this invention, the specific wavelengths are 660nm red light and 940nm infrared light. The light absorption difference refers to the difference in absorption capacity of substances in different physiological states for the same specific wavelength of light. The absorbance refers to the degree of light absorption by the medium in the clean area. The hemoglobin concentration index refers to the overall concentration level of hemoglobin in the capillaries of the gingival tissue in the clean area. The blood oxygen saturation refers to the percentage of oxyhemoglobin in the total hemoglobin. The tissue perfusion index refers to the intensity of blood flow to the tissue microcirculation. The health status refers to the overall physiological health status of the gingival tissue in the clean area.

[0032] Optionally, the analysis of the health of the clean area by combining the hemoglobin concentration index, the blood oxygen saturation, and the tissue perfusion index can be achieved using a weighted average algorithm.

[0033] Further, the calculation of the blood oxygen saturation and tissue perfusion index of the clean area based on the absorbance includes: The absorbance is decomposed into AC and DC components; Define the signal quality weight and tissue background weight of the clean area; The R value of the clean area is calculated based on the AC component, the DC component, the signal quality weight, and the tissue background weight. The blood oxygen saturation of the clean area is determined based on the R value; The PI value of the clean area is calculated based on the AC component and the DC component to determine the tissue perfusion index of the clean area.

[0034] Furthermore, as another embodiment of the present invention, the R value is calculated using the following formula:

[0035] in, The R value represents the area to be cleaned. Indicates signal quality weights, This represents the AC component at a wavelength of 660 nanometers. Indicates in AC component at nanometer wavelengths Indicates organizational background weight. Indicates in DC component at nanometer wavelengths Indicates in DC component at nanometer wavelengths.

[0036] Wherein, the AC component refers to the periodic fluctuation portion of the processed spectral signal generated by the heartbeat; the DC component refers to the relatively stable, non-periodic background signal level in the processed spectral signal; the signal quality weight refers to a dimensionless coefficient used to quantify the reliability of the current AC component signal; the tissue background weight refers to a dimensionless coefficient used to assign corresponding importance to the tissue background information reflected by the DC component; the R value refers to the blood oxygenation status of the clean area; and the PI value refers to a dimensionless index used to quantify the blood flow intensity flowing to the microcirculation of the clean area.

[0037] Based on the oral pressure data, this invention analyzes the cleaning needs of the cleaning area, perceives the user's operational intentions and pressure in real time, understands the underlying cleaning needs, and makes intelligent, safe, and efficient responses.

[0038] Specifically, the analysis of the cleaning needs of the cleaning area based on the oral pressure data includes: Based on the oral pressure data, analyze the instantaneous pressure value and pressure change rate of the cleaned area; Define the pressure threshold range of the cleaning area, and combine the instantaneous pressure value and the pressure threshold range to determine the force level of the cleaning area; By combining the instantaneous pressure value and pressure change rate, the operational intent of the user applying force to the corresponding cleaning area is analyzed; The cleaning requirements of the cleaning area are determined based on the applied force level and the operational intent.

[0039] The instantaneous pressure value refers to the value that reflects the instantaneous pressure between the nozzle and the tooth or gum contact surface, which is collected and quantified in real time by the pressure sensor at a specific sampling moment. The pressure change rate refers to the amount of change of the instantaneous pressure value per unit time. The pressure threshold range refers to one or more continuous pressure value ranges that are preset according to the physiological tolerance of human oral tissues and clinical safety guidelines. These intervals are used to map continuous instantaneous pressure values ​​to discrete, clinically significant levels, such as "light touch zone," "standard cleaning zone," and "high pressure risk zone." The force level refers to a static classification of the user's current force application behavior based on the pressure threshold interval into which the instantaneous pressure value falls, including "light touch," "standard," and "high pressure." The force-applying user refers to an individual currently operating the water flosser and applying pressure to a specific cleaning area in the oral cavity through the nozzle. The operational intent refers to the operational goal that the force-applying user wants to achieve next, based on a comprehensive analysis of the instantaneous pressure value and the pressure change rate, such as "locating the cleaning area," "performing routine cleaning," or "intensifying cleaning of stubborn stains." The cleaning requirements refer to the specific work requirements that the water flosser should meet in the current cleaning area, ultimately determined by the system after a fusion decision based on the force level and the operational intent.

[0040] Optionally, the user's operational intent for applying force in the cleaning area is analyzed by combining the instantaneous pressure value and the pressure change rate.

[0041] Furthermore, the analysis of the user's operational intent regarding the cleaning area, combining the instantaneous pressure value and the rate of pressure change, includes: Define the basic operational intent for the cleaned area; Define the characteristic patterns of the basic operational intent; Based on the characteristic pattern, the instantaneous pressure value, and the pressure change rate, the initial intention of the force-applying user is determined; The initial intent is validated by a window to obtain a window validation result. When the window validation result meets the preset window validation criteria, the initial intent is taken as the operation intent of the force-applying user.

[0042] The basic operational intent refers to a set of mutually exclusive and complete discrete states predefined based on typical user behaviors during oral cleaning, used to describe the user's current operational goal. The feature pattern refers to the unique quantitative rules established for each basic operational intent, used to distinguish the intent at the data level. The initial intent refers to a preliminary, unverified intent judgment obtained by the system at a certain sampling moment based on the current instantaneous pressure value and pressure change rate, through real-time matching with the feature pattern. The window verification result refers to the conclusion obtained after statistical analysis of multiple consecutively generated initial intents within a preset time window. The window verification standard refers to a set of preset judgment criteria used to evaluate whether the window verification result meets the confirmation conditions.

[0043] S3. Combining the health status and the cleaning requirements, analyze the initial water pressure value of the cleaning area using a preset area-state-water pressure mapping model.

[0044] This invention combines the health status and the cleaning needs, and uses a preset region-state-water pressure mapping model to analyze the initial water pressure value of the cleaning area. This can identify the differentiated health and cleaning needs of different oral regions and improve the reliability of subsequent oral cleaning.

[0045] Specifically, the step of combining the health status and the cleaning requirements, and using a pre-defined area-state-water pressure mapping model to analyze the initial water pressure value of the cleaning area, includes: The health status and the cleaning requirements are quantified to obtain quantified health status and quantified cleaning requirements. Combining the health status and the cleaning requirements, the baseline water pressure of the cleaning area is analyzed using a pre-defined area-state-water pressure mapping model; Based on the baseline water pressure, the quantitative health status, and the quantitative cleaning requirements, calculate the weighted baseline water pressure value of the cleaning area; Define the safety boundaries of the clean area; Based on the safety boundary, the weighted basic water pressure value is optimized to obtain the initial water pressure of the clean area.

[0046] The quantitative health status refers to converting the qualitative description of oral tissue health status into a dimensionless, continuous or discrete numerical value. The quantitative cleaning demand refers to converting the qualitative description of user operation intention into a dimensionless numerical coefficient. The region-state-water pressure mapping model refers to a multi-dimensional knowledge base pre-installed in the device for decision-making. This model takes "oral region," "health status," and "cleaning demand" as input dimensions, and maps and outputs a "basic water pressure benchmark" that best matches the current situation through lookup tables, rule sets, or functional relationships. The weighted basic water pressure value is the water pressure value obtained by weighting the "basic water pressure value" obtained from the region-state-water pressure mapping model with the quantitative health status and the quantitative cleaning demand coefficient. The safety boundary refers to the preset absolute upper and lower limits of the water pressure value to ensure user safety. The initial water pressure refers to the final determined real-time water pressure control command value that will be sent to the water pump execution module.

[0047] In detail, the region-state-hydraulic pressure mapping model can be obtained by training a machine learning model using clinical data collected from dental clinics as a training set.

[0048] S4. Collect the subconscious physiological response signal of the oral cavity corresponding to the target oral cavity under the initial water pressure value, and analyze the comfort coefficient of the oral cavity user based on the subconscious physiological response signal.

[0049] It should be explained that the subconscious physiological response signal refers to a measurable signal corresponding to a non-involuntary, non-deliberate, instinctive physiological change produced by the user's body when receiving a specific water pressure stimulus, such as electromyographic signals, skin electrical activity, heart rate and heart rate variability, etc.

[0050] Based on the subconscious physiological response signals, this invention analyzes the user's comfort level during oral cleaning, enabling the water flosser to no longer be a one-way output device, but to sense the user's most realistic physical sensations in real time and dynamically optimize water pressure. This ensures cleaning effectiveness while improving user comfort and safety during use.

[0051] In detail, the analysis of the user's comfort level based on the subconscious physiological response signals includes: The subconscious physiological response signals were divided into EMG signals, GSR signals, and PPG signals; The root mean square value of the EMG signal is calculated to analyze the pain discomfort of the oral hygiene user. Calculate the peak amplitude of the GSR signal to analyze the startle aversion of the oral hygiene user; Calculate the instantaneous heart rate of the PPG signal to analyze heart rate arrhythmia in the oral hygiene user; The comfort level of the oral hygiene user was analyzed by combining the aforementioned pain discomfort, fright discomfort, and heart rate discomfort.

[0052] The EMG signal refers to the weak bioelectrical signal generated when muscle fibers contract upon receiving instructions from the nervous system. The GSR signal refers to the signal that measures the minute changes in skin conductivity caused by changes in the activity of skin sweat glands. The PPG signal refers to the photoplethysmography (PPG) signal. The root mean square value refers to the square root of the average of the squares of the signal amplitude within a specific time window. The pain asymmetry refers to the intensity of pain or persistent discomfort experienced by the user due to current water pressure stimulation. The peak amplitude refers to the maximum value of a momentary spike signal exceeding a preset threshold in the GSR signal. The startle asymmetry refers to the momentary startle or tension experienced by the user due to sudden or unexpected stimulation. The instantaneous heart rate refers to the real-time heart rate extracted by analyzing the PPG signal beat by beat. The heart rate asymmetry refers to the comprehensive physiological load and long-term tension experienced by the user during the current cleaning process. The comfort coefficient reflects the user's overall subjective comfort during the oral cleaning process; the closer the value is to 1, the more comfortable it is, and the closer it is to 0, the more uncomfortable it is.

[0053] Furthermore, the analysis of the heart rate arrhythmia of the oral hygiene user includes: Based on the instantaneous heart rate of the oral hygiene user, the standard deviation of the RR interval of the oral hygiene user was analyzed; Define the resting heart rate baseline for the oral hygiene user; Heart rate discomfort of the oral hygiene user is calculated based on the standard deviation of the RR interval and the resting heart rate baseline.

[0054] Furthermore, as another embodiment of the present invention, the heart rate arrhythmia is calculated using the following formula:

[0055] in, This indicates that the user's heart rate is not appropriate during oral hygiene. This indicates the instantaneous heart rate of the user undergoing oral hygiene procedures. This represents the baseline resting heart rate of users who perform oral hygiene procedures. This indicates the weighting of heart rate deviation among users who undergo oral hygiene procedures. This represents the standard deviation of the RR interval for oral hygiene users. Represents extremely small positive numbers. This represents the weighting of heart rate variability.

[0056] Among them, the heart rate variability refers to an index calculated by analyzing consecutive beat-to-beat heart rate intervals and reflecting the degree of change in heart rate intervals. The resting heart rate baseline refers to the personalized heart rate reference value measured and calculated for an individual oral cleaning user in a physiological state of relaxation, without stress, and without external stimuli. The heart rate deviation weight refers to the relative importance used to quantify the factor that the current instantaneous heart rate deviates from the individual's resting baseline in the calculation of the overall heart rate discomfort. The heart rate variability weight refers to the relative importance used to quantify the factor of "decrease in heart rate variability" in the calculation of the overall heart rate discomfort. The extremely small positive number refers to a positive number that is very close to zero numerically, to prevent the denominator from becoming infinite and causing the calculation result to overflow when the standard deviation of the RR interval is zero or approaches zero. The present invention can be .

[0057] S5. Optimize the initial water pressure value based on the comfort coefficient to obtain a target water pressure value, and perform intelligent adaptation of the water pressure of the oral irrigator for the target oral cavity to be cleaned based on the target water pressure value.

[0058] The present invention optimizes the initial water pressure value based on the comfort coefficient to obtain a target water pressure value, which can improve the cleaning experience of oral cleaning users. Among them, the target water pressure value refers to the water pressure value obtained by optimizing the initial water pressure value according to the comfort coefficient. Specifically, optimizing the initial water pressure value based on the comfort coefficient to obtain the target water pressure value can be achieved by dividing the comfort levels of the comfort coefficient. Among them, the comfort levels include an extremely uncomfortable area (0 ≤ CC < 0.2), and an emergency downgrading strategy can be adopted, such as reducing the water pressure value by 15%; a mildly uncomfortable area (0.2 ≤ CC < 0.4), and a gentle downgrading strategy can be adopted, such as reducing the water pressure value by 5%; a comfortable area (0.4 ≤ CC ≤ 0.8), and a fine-tuning and maintenance strategy can be adopted; an optimal area (0.8 < CC ≤ 1.0), and a locking and learning strategy can be adopted.

[0059] Finally, the present invention performs intelligent adaptation of the water pressure of the oral irrigator for the target oral cavity to be cleaned based on the target water pressure value, which can improve the cleaning effect while improving the cleaning experience of oral cleaning users.

[0060] First, by integrating multi-dimensional data such as oral pressure, gum tissue condition, and user posture, the system can accurately identify the differentiated health and cleaning needs of different oral regions, thereby generating an initial water pressure value. This completely changes the traditional one-size-fits-all approach of oral irrigators, laying a scientific foundation for efficient and safe cleaning. More importantly, this invention innovatively introduces the monitoring and comfort coefficient analysis of the user's subconscious physiological response signals, constructing a unique physiological feedback loop. This makes the oral irrigator no longer a one-way output, but can perceive the user's most realistic physical sensations in real time and dynamically optimize water pressure. Thus, while ensuring cleaning effectiveness, it improves user comfort and safety, effectively avoiding problems such as gum damage and bleeding caused by excessive water pressure or individual differences. Therefore, this invention can improve the cleaning effect for oral hygiene users.

[0061] like Figure 2 The diagram shown is a functional module diagram of a water pressure intelligent adaptation system for a water flosser that integrates sensing according to the present invention.

[0062] The intelligent water pressure adaptation system 200 for a water flosser based on integrated sensing, as described in this invention, can be installed in an electronic device. Depending on the functions implemented, the intelligent water pressure adaptation system may include a cleaning area determination module 201, a cleaning requirement calculation module 202, an initial water pressure value analysis module 203, a comfort factor analysis module 204, and a water pressure intelligent adaptation module 205. The module described in this invention can also be referred to as a unit, which refers to a series of computer program segments that can be executed by the processor of an electronic device and perform a fixed function, stored in the memory of the electronic device.

[0063] In this embodiment of the invention, the functions of each module / unit are as follows: The cleaning area determination module 201 is used to acquire oral pressure data, gingival tissue state data and user operation posture data of the water flosser in order to determine the cleaning area of ​​the target oral cavity by the water flosser. The cleaning needs calculation module 202 is used to analyze the health of the cleaning area based on the gingival tissue status data, and to analyze the cleaning needs of the cleaning area based on the oral pressure data. The initial water pressure value analysis module 203 is used to analyze the initial water pressure value of the cleaning area by combining the health status and the cleaning requirements and using a preset area-state-water pressure mapping model. The comfort coefficient analysis module 204 is used to collect the subconscious physiological reaction signal of the oral cleaning user corresponding to the target oral cavity under the initial water pressure value, and analyze the comfort coefficient of the oral cleaning user based on the subconscious physiological reaction signal. The intelligent water pressure adaptation module 205 is used to optimize the initial water pressure value based on the comfort coefficient to obtain a target water pressure value, and to perform intelligent water pressure adaptation of the oral irrigator for cleaning the target oral cavity based on the target water pressure value.

[0064] In detail, the modules in the intelligent water pressure adaptation system 200 for water flossers with integrated sensing described in this embodiment of the invention employ the same methods as described above during use. Figure 1 The method described above uses the same technical means as the intelligent water pressure adaptation method for water flossers with integrated sensing, and can produce the same technical effect, so it will not be repeated here.

[0065] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0066] Finally, it should be noted that in the above embodiments, each embodiment can be combined with each other or independent. Deleting any one of them will not affect the technical implementation of other embodiments. The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for intelligent water pressure adaptation of a dental flosser using integrated sensing, characterized in that, The method includes: The oral pressure data, gingival tissue status data, and user operation posture data of the oral irrigator are acquired to determine the cleaning area of ​​the oral cavity targeted by the oral irrigator. Based on the gingival tissue status data, the health of the cleaning area is analyzed; based on the oral pressure data, the cleaning needs of the cleaning area are analyzed. Combining the health status and the cleaning requirements, the initial water pressure value of the cleaning area is analyzed using a preset area-state-water pressure mapping model; The subconscious physiological response signals of the oral cavity corresponding to the target oral cavity under the initial water pressure value are collected, and the comfort coefficient of the oral cavity user is analyzed based on the subconscious physiological response signals. The initial water pressure value is optimized based on the comfort factor to obtain a target water pressure value, and intelligent water pressure adaptation of the oral irrigator is performed based on the target water pressure value to clean the target oral cavity.

2. The intelligent water pressure adaptation method for a dental flosser based on fusion sensing as described in claim 1, characterized in that, The analysis of the health of the cleaned area based on the gingival tissue status data includes: The gingival tissue state data is preprocessed to obtain a processed spectral signal; By processing the spectral signal, the differences in light absorption and absorbance of the clean area at a specific wavelength are analyzed; Based on the difference in light absorption, the hemoglobin concentration index of the clean area is calculated; Based on the absorbance, calculate the blood oxygen saturation and tissue perfusion index of the clean area; The health status of the clean area is analyzed by combining the hemoglobin concentration index, the blood oxygen saturation, and the tissue perfusion index.

3. The intelligent water pressure adaptation method for a dental flosser based on fusion sensing as described in claim 2, characterized in that, The calculation of the blood oxygen saturation and tissue perfusion index of the clean area based on the absorbance includes: The absorbance is decomposed into AC and DC components; Define the signal quality weight and tissue background weight of the clean area; Based on the AC component, the DC component, the signal quality weight, and the tissue background weight, the R value of the clean area is calculated using the following formula: in, The R value represents the area to be cleaned. Indicates signal quality weights, This represents the AC component at a wavelength of 660 nanometers. Indicates in AC component at nanometer wavelengths Indicates organizational background weight. Indicates in DC component at nanometer wavelengths Indicates in DC component at nanometer wavelengths; The blood oxygen saturation of the clean area is determined based on the R value; The PI value of the clean area is calculated based on the AC component and the DC component to determine the tissue perfusion index of the clean area.

4. The intelligent water pressure adaptation method for a dental flosser based on fusion sensing as described in claim 1, characterized in that, The step of determining the cleaning area of ​​the target oral cavity by the oral irrigator based on the user's operation posture data includes: Based on the user's operating posture data corresponding to the water flosser, the three-dimensional posture angle of the water flosser is analyzed. Establish the oral cavity zone coordinate system of the target oral cavity; Based on the three-dimensional attitude angle, the macroscopic area of ​​the oral cavity targeted by the water flosser for cleaning is determined in the oral cavity partition coordinate system; The microscopic characterization of the macroscopic region is identified by using the gingival tissue state data and oral pressure data corresponding to the oral irrigator. Based on the aforementioned microscopic characterization, the cleaning area of ​​the target oral cavity by the oral irrigator is determined.

5. The intelligent water pressure adaptation method for a dental flosser based on fusion sensing as described in claim 1, characterized in that, The analysis of the cleaning needs of the cleaning area based on the oral pressure data includes: Based on the oral pressure data, analyze the instantaneous pressure value and pressure change rate of the cleaned area; Define the pressure threshold range of the cleaning area, and combine the instantaneous pressure value and the pressure threshold range to determine the force level of the cleaning area; By combining the instantaneous pressure value and pressure change rate, the operational intent of the user applying force to the corresponding cleaning area is analyzed; The cleaning requirements of the cleaning area are determined based on the applied force level and the operational intent.

6. The intelligent water pressure adaptation method for a dental flosser based on fusion sensing as described in claim 5, characterized in that, The analysis of the user's operational intent regarding the cleaning area, combining the instantaneous pressure value and pressure change rate, includes: Define the basic operational intent for the cleaned area; Define the characteristic patterns of the basic operational intent; Based on the characteristic pattern, the instantaneous pressure value, and the pressure change rate, the initial intention of the force-applying user is determined; The initial intent is validated by a window to obtain a window validation result. When the window validation result meets the preset window validation criteria, the initial intent is taken as the operation intent of the force-applying user.

7. The intelligent water pressure adaptation method for a dental flosser based on fusion sensing as described in claim 1, characterized in that, The process of combining the health status and cleaning requirements, and using a pre-defined area-state-water pressure mapping model to analyze the initial water pressure value of the cleaning area, includes: The health status and the cleaning requirements are quantified to obtain quantified health status and quantified cleaning requirements. Combining the health status and the cleaning requirements, the baseline water pressure of the cleaning area is analyzed using a pre-defined area-state-water pressure mapping model; Based on the baseline water pressure, the quantitative health status, and the quantitative cleaning requirements, calculate the weighted baseline water pressure value of the cleaning area; Define the safety boundaries of the clean area; Based on the safety boundary, the weighted basic water pressure value is optimized to obtain the initial water pressure of the clean area.

8. The intelligent water pressure adaptation method for a dental flosser based on fusion sensing as described in claim 1, characterized in that, The process of analyzing the user's comfort level for oral hygiene, based on the surface defects and subconscious physiological response signals, includes: The subconscious physiological response signals were divided into EMG signals, GSR signals, and PPG signals; The root mean square value of the EMG signal is calculated to analyze the pain discomfort of the oral hygiene user. Calculate the peak amplitude of the GSR signal to analyze the startle aversion of the oral hygiene user; Calculate the instantaneous heart rate of the PPG signal to analyze heart rate arrhythmia in the oral hygiene user; The comfort level of the oral hygiene user was analyzed by combining the aforementioned pain discomfort, fright discomfort, and heart rate discomfort.

9. The intelligent water pressure adaptation method for a dental flosser based on fusion sensing as described in claim 8, characterized in that, The analysis of heart rate arrhythmia in the oral hygiene user includes: Based on the instantaneous heart rate of the oral hygiene user, the standard deviation of the RR interval of the oral hygiene user was analyzed; Define the resting heart rate baseline for the oral hygiene user; Based on the standard deviation of the RR interval and the baseline resting heart rate, the heart rate discomfort of the oral hygiene user is calculated using the following formula: in, This indicates that the user's heart rate is not appropriate during oral hygiene. This indicates the instantaneous heart rate of the user undergoing oral hygiene procedures. This represents the baseline resting heart rate of users who perform oral hygiene procedures. This indicates the weighting of heart rate deviation among users who undergo oral hygiene procedures. This represents the standard deviation of the RR interval for oral hygiene users. Represents extremely small positive numbers. This represents the weighting of heart rate variability.

10. A water pressure intelligent adaptation system for a dental flosser that integrates sensing, characterized in that, The system includes: The cleaning area determination module is used to acquire oral pressure data, gingival tissue status data, and user operation posture data of the water flosser in order to determine the cleaning area of ​​the target oral cavity by the water flosser. The cleaning needs calculation module is used to analyze the health of the cleaning area based on the gingival tissue status data, and to analyze the cleaning needs of the cleaning area based on the oral pressure data. The initial water pressure analysis module is used to analyze the initial water pressure value of the cleaning area by combining the health status and the cleaning requirements and using a preset area-state-water pressure mapping model. The comfort coefficient analysis module is used to collect the subconscious physiological reaction signals of the oral cavity corresponding to the target oral cavity under the initial water pressure value, and to analyze the comfort coefficient of the oral cavity user based on the subconscious physiological reaction signals. The water pressure intelligent adaptation module is used to optimize the initial water pressure value based on the comfort coefficient to obtain a target water pressure value, and to perform intelligent water pressure adaptation of the oral irrigator for cleaning the target oral cavity based on the target water pressure value.

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