CN116667737A - Electric toothbrush noise reduction control system and method and electric toothbrush - Google Patents

Electric toothbrush noise reduction control system and method and electric toothbrush Download PDF

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Publication number
CN116667737A
CN116667737A CN202310468973.7A CN202310468973A CN116667737A CN 116667737 A CN116667737 A CN 116667737A CN 202310468973 A CN202310468973 A CN 202310468973A CN 116667737 A CN116667737 A CN 116667737A
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China
Prior art keywords
preset
pressure
motor
electric toothbrush
working mode
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CN202310468973.7A
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Chinese (zh)
Inventor
管恩平
刘书润
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Shenzhen Yunding Information Technology Co Ltd
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Shenzhen Yunding Information Technology Co Ltd
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Priority to CN202310468973.7A priority Critical patent/CN116667737A/en
Publication of CN116667737A publication Critical patent/CN116667737A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/221—Control arrangements therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/24—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like rotating continuously
    • A61C17/26—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like rotating continuously driven by electric motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/06—Linear motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/50—Reduction of harmonics

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Brushes (AREA)

Abstract

The embodiment of the application discloses a noise reduction control system and method for an electric toothbrush and the electric toothbrush, which are applied to a rotary electric toothbrush, wherein the system comprises: the device comprises a pressure acquisition module and a motor execution module, wherein the pressure acquisition module is used for acquiring the attaching pressure of the brush head of the electric toothbrush to the teeth; the motor execution module is used for acquiring the working mode of the motor execution module according to the attaching pressure and a preset judging rule, outputting a working signal to the motor according to the working mode, and controlling the brush head to work according to the working signal. The motor execution module is controlled to execute different working modes by judging the fitting pressure condition of the toothbrush head fitting teeth so as to reduce noise generated by the motor and be beneficial to improving the experience satisfaction degree of a user.

Description

Electric toothbrush noise reduction control system and method and electric toothbrush
[ field of technology ]
The application relates to the technical field of intelligent toothbrushes, in particular to a noise reduction control system and method for an electric toothbrush and the electric toothbrush.
[ background Art ]
Along with the continuous improvement of the living standard of people, people pay attention to the oral hygiene of people gradually, good oral hygiene not only can improve living experience, but also can bring self confidence, the toothbrush is a large living tool for improving oral hygiene, the traditional toothbrush is used for manually rubbing the brush head on the surface of teeth to clean residual dirt in the gaps between teeth, however, the vibration and friction frequency of manual brushing teeth are low, so that the cleaning of the oral hygiene is not in place, and the electric toothbrush gradually becomes the main stream of the era by virtue of the advantages of convenient use and good cleaning effect. However, the existing electric toothbrush has a fixed working mode when in use, the motor of the electric toothbrush can work at a fixed frequency or amplitude and generate noise, and when the toothbrush head leaves the teeth, the motor still works in the fixed working mode, so that the noise is not reduced, and the user experience satisfaction is poor.
[ application ]
In view of the above, the present application provides a noise reduction control system and method for an electric toothbrush, and an electric toothbrush, so as to achieve the purpose of improving the user experience satisfaction.
The specific technical scheme of the first embodiment of the application is as follows:
a power toothbrush noise reduction control system for use with a rotary power toothbrush, the system comprising: the pressure acquisition module and the motor execution module are connected with the output end of the pressure acquisition module, and the output end of the motor execution module is connected with the motor of the electric toothbrush; the pressure acquisition module is used for acquiring the attaching pressure of the brush head of the electric toothbrush attached to teeth; the motor execution module is used for acquiring a working mode of the motor execution module according to the attaching pressure and a preset judging rule, and outputting a working signal to the motor according to the working mode; the motor controls the brush head to work according to the working signal; the preset judging rule is as follows: judging the sizes of the attaching pressure and a first preset pressure threshold value; when the attaching pressure is larger than the first preset pressure threshold range, the motor executing module executes a preset first working mode; when the attaching pressure is within the first preset pressure threshold range, the motor executing module executes a preset second working mode; when the attaching pressure is smaller than the first preset pressure threshold range, the motor executing module executes a preset third working mode; the preset first working mode, the preset second working mode and the preset third working mode are working modes of a motor execution module; the preset first working mode, the preset second working mode and the preset third working mode are matched with the working characteristics of the rotary electric toothbrush.
Preferably, the working frequency threshold of the second working mode is determined to be 100Hz to 350Hz according to the natural frequency of the eyeball, the natural frequency of the tooth root and the ergonomics.
Preferably, the pressure acquisition module includes: the magnetic core, the magnetic field measuring sensor and the main control module; the magnetic core is positioned at a motor shaft of the electric toothbrush, the motor shaft comprises a motor front shaft or a motor rear shaft, and the magnetic core is used for generating a magnetic field; the magnetic field measuring sensor is positioned on a motor bracket or a motor shell of the electric toothbrush and is used for measuring the magnetic induction voltage generated by the magnetic core in real time; the main control module is connected with the magnetic field measuring sensor and is used for obtaining the attaching pressure of the brush head of the electric toothbrush attached to teeth according to the magnetic induction voltage.
Preferably, the main control module is used for obtaining the laminating pressure of the brush head of the electric toothbrush to the teeth according to the magnetic induction voltage, and the main control module comprises: a first linear relation is preset in the main control module and used for representing the relation between the first magnetic induction voltage and the fitting pressure of the brush head to the teeth; the first magnetic induction voltage is generated by pressure applied to the brush head of the electric toothbrush when the brush head is attached to teeth; the main control module obtains the attaching pressure of the brush head attached to the teeth according to the first magnetic induction voltage and the first linear relation.
Preferably, the first linear relationship is: y=k 1 X+b 1 Wherein Y is a first magnetic induction voltage, X is a bonding pressure of the brush head to the teeth, and k is 1 And b 1 Is constant.
Preferably, the main control module is used for obtaining the laminating pressure of the brush head of the electric toothbrush to the teeth according to the magnetic induction voltage, and the main control module comprises: a first nonlinear relation is preset in the main control module and used for representing the relation between the second magnetic induction voltage and the fitting resistance of the brush head to the teeth; the second magnetic induction voltage is generated by resistance force applied to the brush head of the electric toothbrush when the brush head is attached to teeth; and the main control module obtains the attaching pressure of the brush head attached to the teeth according to the second magnetic induction voltage and the first nonlinear relation.
Preferably, the first nonlinear relationship is: y=k 2 X 3 +k 3 X 2 +k 4 X+b 2 Wherein Y is the second magnetic induction voltage, X is the bonding pressure of the brush head to the teeth, and k is 2 、k 3 、k 4 And b 2 Is constant.
Preferably, the control frequency of the working signal is a single-frequency sine wave.
The specific technical scheme of the second embodiment of the application is as follows:
a method of noise reduction control for an electric toothbrush, for use with a rotary electric toothbrush, the method comprising: the pressure acquisition module is used for acquiring the attaching pressure of the brush head of the electric toothbrush to the teeth; the motor execution module is used for acquiring a working mode of the motor execution module according to the attaching pressure and a preset judging rule, and outputting a working signal to the motor according to the working mode; the motor controls the brush head to work according to the working signal; the preset judging rule is as follows: judging the sizes of the attaching pressure and a first preset pressure threshold value; when the attaching pressure is larger than the first preset pressure threshold range, the motor executing module executes a preset first working mode; when the attaching pressure is within the first preset pressure threshold range, the motor executing module executes a preset second working mode; when the attaching pressure is smaller than the first preset pressure threshold range, the motor executing module executes a preset third working mode; the preset first working mode, the preset second working mode and the preset third working mode are working modes of a motor execution module; the preset first working mode, the preset second working mode and the preset third working mode are matched with the working characteristics of the rotary electric toothbrush.
The specific technical scheme of the third embodiment of the application is as follows: an electric toothbrush comprising an electric toothbrush noise reduction control system as described in any of the first embodiments of the present application.
The implementation of the embodiment of the application has the following beneficial effects:
the system comprises a pressure acquisition module and a motor execution module, wherein the output end of the pressure acquisition module is connected with the input end of the motor execution module, and the output end of the motor execution module is connected with a motor of the electric toothbrush; the pressure acquisition module is used for acquiring the attaching pressure of the brush head of the electric toothbrush to the teeth; the motor execution module is used for acquiring the working mode of the motor execution module according to the attaching pressure and a preset judging rule, and outputting a working signal to the motor according to the working mode; the motor controls the brush head to work according to the working signal; the preset judgment rule is as follows: judging the sizes of the attaching pressure and a first preset pressure threshold value; when the attaching pressure is larger than a first preset pressure threshold range, the motor executing module executes a preset first working mode; when the attaching pressure is within a first preset pressure threshold range, the motor executing module executes a preset second working mode; when the attaching pressure is smaller than a first preset pressure threshold range, the motor executing module executes a preset third working mode; the preset first working mode, the preset second working mode and the preset third working mode are working modes of the motor execution module; the preset first operating mode, the preset second operating mode and the preset third operating mode are matched with the operating characteristics of the rotary electric toothbrush. The motor execution module is controlled to execute different working modes by judging the fitting pressure condition of the toothbrush head fitting teeth, when the fitting pressure is smaller than a first preset pressure threshold value, the fitting pressure of the toothbrush head and the teeth is smaller, the tooth brushing force of a user is smaller, the tooth brushing willingness is reduced, the working mode of the motor execution module is changed to reduce noise generated by the motor, and the user experience satisfaction is improved.
[ description of the drawings ]
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an electric toothbrush noise reduction control system;
FIG. 2 is a flow chart of a preset judgment rule;
FIG. 3 is a schematic diagram of a pressure acquisition module;
fig. 4 is a flow chart of a method of power toothbrush noise reduction control.
101, a pressure acquisition module; 102. a motor execution module; 103. a motor; 301. a magnetic core; 302. a magnetic field measurement sensor; 303. and a main control module.
[ detailed description ] of the application
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms first, second and the like in the description and in the claims and drawings are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not limited to only those steps or modules but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The basic principle of noise reduction is to control the magnitude and distribution of the acoustic energy in the frequency domain, and thus, an acoustic wave that can be heard by a person must be generated since the electric toothbrush must use a vibration motor (the vibration frequency of which is in the acoustic wave range and needs to be avoided in the subsonic wave range). The wave equation of the acoustic wave can be expressed as x=acos (ωt+Φ), where x is the wave, t is the time variable, ω=2pi f, a is the vibration amplitude, f is the vibration frequency, Φ is the initial phase of vibration, and the phase can default to 0.
Wherein E is vibration energy, T is a time period, ρ is air density, T is a time variable, Φ is a vibration initial phase, ω=2pi f, f is a vibration frequency, and a is a vibration amplitude.
From the above formula, the greater the vibration frequency and vibration amplitude, the greater the vibration energy flow density E, that is, the greater the vibration energy, and thus the greater the sound energy in the air, and the greater the sound appears. Noise reduction requires reasonable reduction of vibration frequency and reasonable control of vibration amplitude under the condition of unchanged air density. However, since the rotary brush head is required to generate proper cleaning force on the tooth surface, reasonable frequency and amplitude are required, and the basic principle of how to control the sound in the air and to make the sound generated by the vibration of the tooth surface smaller during tooth brushing is reasonable control of the frequency and the vibration amplitude.
Referring to fig. 1, a schematic diagram of a noise reduction control system for an electric toothbrush according to a first embodiment of the present application is applied to a rotary electric toothbrush, and is used for reducing noise generated by a motor in the electric toothbrush, and includes: the pressure acquisition module 101 and the motor execution module 102, wherein the output end of the pressure acquisition module 101 is connected with the input end of the motor execution module 102, and the output end of the motor execution module 102 is connected with the motor 103 of the electric toothbrush; the pressure acquisition module 101 is used for acquiring the attaching pressure of the brush head of the electric toothbrush attached to teeth; the motor execution module 102 is configured to obtain a working mode of the motor execution module 102 according to the bonding pressure and a preset judgment rule, and output a working signal to the motor 103 according to the working mode;
referring to fig. 2, the preset judgment rules are as follows:
step 201, judging the size of the attaching pressure and a first preset pressure threshold;
202, when the attaching pressure is greater than a first preset pressure threshold range, the motor executing module executes a preset first working mode;
step 203, when the bonding pressure is within a first preset pressure threshold range, the motor execution module executes a preset second working mode;
step 204, when the bonding pressure is smaller than the first preset pressure threshold range, the motor execution module executes a preset third working mode;
the preset first working mode, the preset second working mode and the preset third working mode are working modes of the motor execution module; the preset first working mode, the preset second working mode and the preset third working mode are matched with the working characteristics of the rotary electric toothbrush; the motor controls the brush head to work according to the working signal.
Specifically, the working modes are provided with a first working mode, a second working mode and a third working mode according to the sizes of different attaching pressures, when the attaching pressure is larger than a first preset pressure threshold range, the pressure of the brush head attached to teeth is overlarge at the moment, if the vibration frequency of the toothbrush is larger, the teeth can be damaged, at the moment, the motor executing module executes the preset first working mode, specifically, the first working mode can be any working mode that the motor executing module stops working or the vibration amplitude of the motor executing module is in the first preset threshold range, the first preset threshold can be set according to specific requirements, for example, the first preset threshold can be smaller than 80HZ, and the method is not limited; when the fitting pressure is within a first preset pressure threshold range, the pressure of the brush head fitting teeth is moderate, the user is in the tooth brushing process, the motor execution module executes a preset second working mode, specifically, the second working mode can be that the vibration frequency of the motor execution module is within a second preset threshold, and the second preset threshold can be set according to specific requirements, for example, 60-350HZ; when the fitting pressure is smaller than the first preset pressure threshold range, the pressure of the brush head fitting teeth is smaller, the user is not in the tooth brushing process, the motor execution module executes a preset third working mode, specifically, the third working mode can be any working mode of stopping the motor execution or enabling the vibration amplitude of the motor execution module to be in the third preset threshold range or enabling the vibration frequency of the motor execution module to be in the fourth preset threshold range, the third preset threshold and the fourth preset threshold can be set according to specific requirements, for example, the third preset threshold can be 5-30 degrees to reduce the shaking influence of the swing chord height, and the fourth preset threshold can be 20-100HZ.
Specifically, the first preset pressure threshold may be set according to specific requirements, for example, 50 gf-400 gf may be used by an adult, and 30-200 gf may be used by a minor and an elderly person when using the electric toothbrush, so that the range of the first preset pressure threshold is reduced to be beneficial to protecting the dental health of the minor and the elderly person due to poor pressure bearing capacity of the minor and the elderly person.
The motor execution module is controlled to execute different working modes by judging the fitting pressure condition of the toothbrush head fitting teeth, when the fitting pressure is smaller than a first preset pressure threshold value, the fitting pressure of the toothbrush head and the teeth is smaller, the tooth brushing force of a user is smaller, the tooth brushing willingness is reduced, the working mode of the motor execution module is changed to reduce noise generated by the motor, and the user experience satisfaction is improved.
In a specific embodiment, the operating frequency threshold of the second operating mode is determined to be 100Hz to 350Hz according to the natural frequency of the eyeball, the natural frequency of the tooth root and the ergonomics. Specifically, according to human engineering, a human body is divided into different parts, and the most sensitive frequency of the different parts of the human body relative to environmental vibration can be measured, wherein the most sensitive frequency is a natural frequency. Through human engineering measurement, the natural frequency of the eyeball of the human body is 40-100 Hz, the natural frequency of the root of the tooth is more than 434Hz, and the natural frequencies of other organs of the human body are positioned in the infrasonic wave range (less than 20 Hz). In order to ensure that the working frequency of the second working mode can furthest reduce the influence of the frequency generated by motor vibration on the human body, the natural frequency of the working frequency reference eyeball and the tooth root of the second working mode is set to be 100Hz to 350Hz, and the natural frequency range of the eyeball and the tooth root can be avoided from 100Hz to 350Hz, so that the frequency generated by motor vibration can furthest influence the human body organ, and the high-efficiency cleaning effect of the brush head can be simultaneously considered.
In a specific embodiment, please refer to fig. 3, the pressure acquisition module includes: a magnetic core 301, a magnetic field measurement sensor 302, and a main control module 303; the magnetic core 301 is positioned at a motor shaft of the electric toothbrush, the motor shaft including a motor front shaft or a motor rear shaft, the magnetic core being for generating a magnetic field; the magnetic field measuring sensor 302 is positioned on a motor bracket or a motor shell of the electric toothbrush, a connecting line between a magnetic core and a central point of the magnetic field measuring sensor is parallel to a motor shaft, and the magnetic field measuring sensor is used for measuring magnetic induction voltage generated by the magnetic core in real time; the main control module 303 is connected with the magnetic field measuring sensor 302, and the main control module 303 is used for obtaining the attaching pressure of the brush head of the electric toothbrush attached to teeth according to the magnetic induction voltage.
Specifically, when the brush head receives pressure, the brush head is deformed and bent, the motor shaft is deformed and bent along with the brush head, the position of the magnetic core is changed, the magnetic field emitted by the magnetic core received by the magnetic field measuring sensor is changed, and the magnetic induction voltage received by the main control module is changed, so that the attaching pressure of the brush head of the electric toothbrush to the teeth is obtained in real time.
In a specific embodiment, the main control module is used for obtaining the laminating pressure of the brush head of the electric toothbrush to the teeth according to the magnetic induction voltage, and the main control module comprises: the method comprises the steps that a first linear relation is preset in a main control module and is used for representing the relation between a first magnetic induction voltage and the fitting pressure of the brush head to the teeth; the first magnetic induction voltage is generated by the pressure applied to the brush head of the electric toothbrush when the brush head is attached to teeth; the main control module obtains the attaching pressure of the brush head attached to the teeth according to the first magnetic induction voltage and the first linear relation.
Specifically, when the brush head receives pressure, the brush head produces deformation bending, and the motor axle follows brush head deformation bending, and the position of magnetic core changes, and the magnetic field that magnetic field measurement sensor received the magnetic core transmission changes, and the magnetic induction voltage that main control module received changes to obtain the laminating pressure of electric toothbrush's brush head laminating tooth in real time. The first linear relation is preset in the main control module, and the first linear relation is combined with the characteristic relation between the magnetic induction voltage and the bonding pressure generated when the motor shaft is bent, so that the bonding pressure of the brush head to the teeth is obtained.
Specifically, the relationship between the bonding pressure and the deformation amount of the motor shaft in the deformation bending is shown in table 1.
TABLE 1 deformation amount relation table of bonding pressure and motor shaft deformation bending
In a specific embodiment, the first linear relationship is: y=k 1 X+b 1 Wherein Y is a first magnetic induction voltage, X is a bonding pressure of the brush head to the teeth, and k is 1 And b 1 Is constant. Specifically, the first linear relationship can be based on horses of different materialsThe bending characteristics of the arrival axis may be set, for example, y=0.394x+371.42, and is not limited thereto.
In a specific embodiment, the main control module is used for obtaining the laminating pressure of the brush head of the electric toothbrush to the teeth according to the magnetic induction voltage, and the main control module comprises: the method comprises the steps that a first nonlinear relation is preset in a main control module and used for representing the relation between a second magnetic induction voltage and the fitting pressure of the brush head to the teeth; the second magnetic induction voltage is generated by resistance force applied to the brush head of the electric toothbrush when the brush head is attached to teeth; and the main control module obtains the attaching pressure of the brush head attached to the teeth according to the second magnetic induction voltage and the first nonlinear relation.
Specifically, when the brush head receives pressure, the blocked force of the brush head changes, the swing angle of the motor shaft changes, so that the position of the magnetic core changes, the magnetic field emitted by the magnetic core is received by the magnetic field measuring sensor, the magnetic induction voltage received by the main control module changes, and the attaching pressure of the brush head attached to teeth of the electric toothbrush is obtained in real time. The first nonlinear relation is preset in the main control module, and the first nonlinear relation is combined with the characteristic relation between the magnetic induction voltage generated by the swing of the motor shaft and the bonding pressure, so that the bonding pressure of the brush head to the teeth is obtained. Specifically, the relationship between the bonding pressure and the electromagnetic reading of the magnetic induction voltage is shown in table 2. The deformation positions in table 2 are the swing positions after the motor shaft is deformed under the corresponding pressure.
Table 2 electromagnetic reading relationship meter for bonding pressure and magnetic induction voltage
In a specific embodiment, the first nonlinear relationship is: y=k 2 X 3 +k 3 X 2 +k 4 X+b 2 Wherein Y is the second magnetic induction voltage, X is the brush head pasteFitting pressure of fitting teeth, k 2 、k 3 、k 4 And b 2 Is constant. Specifically, the first nonlinear relationship may be set according to the characteristics of motor shafts made of different materials, for example, y= -0.0033x2+7e-17X3-0.4841X2-5E-15x+277.76, which is not limited herein.
In a specific embodiment, the control frequency of the working signal is a single frequency sine wave. The single-frequency sine wave can reduce the generation of second harmonic waves and multiple harmonic waves, so that the simple harmonic vibration of the working signal and the simple harmonic vibration of the motor vibration are kept synchronous, and the generation of redundant frequency harmonic waves is reduced.
Referring to fig. 4, a flowchart of a noise reduction control method for an electric toothbrush according to a second embodiment of the application is shown, and the method is applied to a rotary electric toothbrush, and comprises:
step 401, a pressure acquisition module is used for acquiring the bonding pressure of a brush head of an electric toothbrush to teeth;
step 402, the motor execution module is configured to obtain a working mode of the motor execution module according to the bonding pressure and a preset judgment rule, and output a working signal to the motor according to the working mode;
step 403, the motor controls the brush head to work according to the working signal;
the preset judgment rule is as follows: judging the sizes of the attaching pressure and a first preset pressure threshold value; when the attaching pressure is larger than a first preset pressure threshold range, the motor executing module executes a preset first working mode; when the attaching pressure is within a first preset pressure threshold range, the motor executing module executes a preset second working mode; when the attaching pressure is smaller than a first preset pressure threshold range, the motor executing module executes a preset third working mode; the preset first working mode, the preset second working mode and the preset third working mode are working modes of the motor execution module; the preset first operating mode, the preset second operating mode and the preset third operating mode are matched with the operating characteristics of the rotary electric toothbrush.
Specifically, the working modes are provided with a first working mode, a second working mode and a third working mode according to the sizes of different attaching pressures, when the attaching pressure is larger than a first preset pressure threshold range, the pressure of the brush head attached to teeth is overlarge at the moment, if the vibration frequency of the toothbrush is larger, the teeth can be damaged, at the moment, the motor executing module executes the preset first working mode, specifically, the first working mode can be any working mode that the motor executing module stops working or the vibration amplitude of the motor executing module is in the first preset threshold range, the first preset threshold can be set according to specific requirements, for example, the first preset threshold can be smaller than 80HZ, and the method is not limited; when the fitting pressure is within a first preset pressure threshold range, the pressure of the brush head fitting teeth is moderate, the user is in the tooth brushing process, the motor execution module executes a preset second working mode, specifically, the second working mode can be that the vibration frequency of the motor execution module is within a second preset threshold, and the second preset threshold can be set according to specific requirements, for example, 60-350HZ; when the fitting pressure is smaller than the first preset pressure threshold range, the pressure of the brush head fitting teeth is smaller, the user is not in the tooth brushing process, the motor execution module executes a preset third working mode, specifically, the third working mode can be any working mode of stopping the motor execution or enabling the vibration amplitude of the motor execution module to be in the third preset threshold range or enabling the vibration frequency of the motor execution module to be in the fourth preset threshold range, the third preset threshold and the fourth preset threshold can be set according to specific requirements, for example, the third preset threshold can be 2.5-15 degrees to reduce the vibration influence of the swing chord height, and the fourth preset threshold can be 20-100HZ.
Specifically, the first preset pressure threshold may be set according to specific requirements, for example, 50 gf-400 gf may be used by an adult, and 30-200 gf may be used by a minor and an elderly person when using the electric toothbrush, so that the range of the first preset pressure threshold is reduced to be beneficial to protecting the dental health of the minor and the elderly person due to poor pressure bearing capacity of the minor and the elderly person.
The motor execution module is controlled to execute different working modes by judging the fitting pressure condition of the toothbrush head fitting teeth, when the fitting pressure is smaller than a first preset pressure threshold value, the fitting pressure of the toothbrush head and the teeth is smaller, the tooth brushing force of a user is smaller, the tooth brushing willingness is reduced, the working mode of the motor execution module is changed to reduce noise generated by the motor, and the user experience satisfaction is improved.
In a specific embodiment, an electric toothbrush in a third embodiment of the present application is characterized in that: comprising an electric toothbrush noise reduction control system as described in any of the first embodiments of the present application. According to the electric toothbrush provided by the embodiment of the application, the motor execution module is controlled to execute different working modes by judging the bonding pressure condition of the toothbrush head to the teeth, when the bonding pressure is smaller than the first preset pressure threshold, the bonding pressure of the toothbrush head to the teeth is smaller, the brushing force of a user is smaller, the brushing willingness of the user is reduced, and the working mode of the motor execution module is changed to reduce the noise generated by the motor, so that the satisfaction of the experience of the user is improved.
In one embodiment of the present application, a computer readable storage medium is provided, the computer readable storage medium being a memory device in an electric toothbrush for storing programs and data corresponding to data of a brushing area obtained by the electric toothbrush. It is understood that the computer storage media herein may include both built-in storage media in the electric toothbrush and extended storage media supported by the electric toothbrush. The computer storage medium provides storage space that stores the software system of the electric toothbrush. Also stored in the memory space are one or more instructions, which may be one or more computer programs (including program code), adapted to be loaded and executed by the processor. The computer storage medium herein may be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory; optionally, at least one computer storage medium remote from the processor may be present.
Those skilled in the art will appreciate that all or part of the processes in the methods of the above embodiments may be implemented by a computer program for instructing relevant hardware, where the program may be stored in a non-volatile computer readable storage medium, and where the program, when executed, may include processes in the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A noise reduction control system for a power toothbrush, for use with a rotary power toothbrush, the system comprising: the pressure acquisition module and the motor execution module are connected with the output end of the pressure acquisition module, and the output end of the motor execution module is connected with the motor of the electric toothbrush;
the pressure acquisition module is used for acquiring the attaching pressure of the brush head of the electric toothbrush attached to teeth;
the motor execution module is used for acquiring a working mode of the motor execution module according to the attaching pressure and a preset judging rule, and outputting a working signal to the motor according to the working mode;
the motor controls the brush head to work according to the working signal;
the preset judging rule is as follows:
judging the sizes of the attaching pressure and a first preset pressure threshold value;
when the attaching pressure is larger than the first preset pressure threshold range, the motor executing module executes a preset first working mode;
when the attaching pressure is within the first preset pressure threshold range, the motor executing module executes a preset second working mode;
when the attaching pressure is smaller than the first preset pressure threshold range, the motor executing module executes a preset third working mode;
the preset first working mode, the preset second working mode and the preset third working mode are working modes of a motor execution module;
the preset first working mode, the preset second working mode and the preset third working mode are matched with the working characteristics of the rotary electric toothbrush.
2. The electric toothbrush noise reduction control system of claim 1, wherein the operating frequency threshold for the second mode of operation is determined to be 100Hz to 350Hz based on the natural frequency of the eye, the natural frequency of the tooth root, and ergonomics.
3. The electric toothbrush noise reduction control system of claim 1, wherein the pressure acquisition module comprises: the magnetic core, the magnetic field measuring sensor and the main control module;
the magnetic core is positioned at a motor shaft of the electric toothbrush, the motor shaft comprises a motor front shaft or a motor rear shaft, and the magnetic core is used for generating a magnetic field;
the magnetic field measuring sensor is positioned on a motor bracket or a motor shell of the electric toothbrush and is used for measuring the magnetic induction voltage generated by the magnetic core in real time;
the main control module is connected with the magnetic field measuring sensor and is used for obtaining the attaching pressure of the brush head of the electric toothbrush attached to teeth according to the magnetic induction voltage.
4. The electric toothbrush noise reduction control system of claim 3, wherein the main control module is configured to obtain a fitting pressure of a brush head of the electric toothbrush against teeth according to the magnetic induction voltage, and the method comprises:
a first linear relation is preset in the main control module and used for representing the relation between the first magnetic induction voltage and the fitting pressure of the brush head to the teeth; the first magnetic induction voltage is generated by pressure applied to the brush head of the electric toothbrush when the brush head is attached to teeth;
the main control module obtains the attaching pressure of the brush head attached to the teeth according to the first magnetic induction voltage and the first linear relation.
5. The electric toothbrush noise reduction control system of claim 4, wherein the first linear relationship is:
Y＝k 1 X+b 1
wherein Y is a first magnetic induction voltage, X is a bonding pressure of the brush head to the teeth, and k is 1 And b 1 Is constant.
6. The electric toothbrush noise reduction control system of claim 3, wherein the main control module is configured to obtain a fitting pressure of a brush head of the electric toothbrush against teeth according to the magnetic induction voltage, and the method comprises:
a first nonlinear relation is preset in the main control module and used for representing the relation between the second magnetic induction voltage and the fitting pressure of the brush head to the teeth; the second magnetic induction voltage is generated by resistance force applied to the brush head of the electric toothbrush when the brush head is attached to teeth;
and the main control module obtains the attaching pressure of the brush head attached to the teeth according to the second magnetic induction voltage and the first nonlinear relation.
7. The electric toothbrush noise reduction control system of claim 6, wherein the first nonlinear relationship is:
Y＝k 2 X 3 +k 3 X 2 +k 4 X+b 2
wherein Y is the second magnetic induction voltage, X is the bonding pressure of the brush head to the teeth, and k is 2 、k 3 、k 4 And b 2 Is constant.
8. The electric toothbrush noise reduction control system of claim 1, wherein the control frequency of the operating signal is a single frequency sine wave.
9. A method for controlling noise reduction of an electric toothbrush, which is applied to a rotary electric toothbrush, and is characterized in that the method comprises the following steps:
the pressure acquisition module is used for acquiring the attaching pressure of the brush head of the electric toothbrush to the teeth;
the motor execution module is used for acquiring a working mode of the motor execution module according to the attaching pressure and a preset judging rule, and outputting a working signal to the motor according to the working mode;
the motor controls the brush head to work according to the working signal;
the preset judging rule is as follows:
judging the sizes of the attaching pressure and a first preset pressure threshold value;
when the attaching pressure is larger than the first preset pressure threshold range, the motor executing module executes a preset first working mode;
when the attaching pressure is within the first preset pressure threshold range, the motor executing module executes a preset second working mode;
when the attaching pressure is smaller than the first preset pressure threshold range, the motor executing module executes a preset third working mode;
the preset first working mode, the preset second working mode and the preset third working mode are working modes of a motor execution module;
the preset first working mode, the preset second working mode and the preset third working mode are matched with the working characteristics of the rotary electric toothbrush.
10. An electric toothbrush, which is specifically diagnosed with: comprising the electric toothbrush noise reduction control system of any of claims 1-8.
CN202310468973.7A 2023-04-23 2023-04-23 Electric toothbrush noise reduction control system and method and electric toothbrush Pending CN116667737A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310468973.7A CN116667737A (en) 2023-04-23 2023-04-23 Electric toothbrush noise reduction control system and method and electric toothbrush

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310468973.7A CN116667737A (en) 2023-04-23 2023-04-23 Electric toothbrush noise reduction control system and method and electric toothbrush

Publications (1)

Publication Number Publication Date
CN116667737A true CN116667737A (en) 2023-08-29

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Country Link
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