Control method of electric toothbrush and electric toothbrush

Abstract

The invention discloses a control method of an electric toothbrush and the electric toothbrush. The control method comprises the following steps: generating a vibration frequency change curve according to a preset first data time sequence; adjusting the vibration frequency change curve according to a preset frequency response curve to generate a second data time sequence; generating a vibration source signal according to the second data time sequence; and driving a motor of the electric toothbrush to operate based on the vibration source signal. According to the control method of the electric toothbrush, the vibration frequency change curve is adjusted through the preset frequency response curve, the high-frequency gain can be improved, the low-frequency gain can be reduced, and the effective range of the motion frequency of the motor is enlarged.

Description

Technical Field

[0001] The present invention relates to the technical field of electric toothbrushes, and in particular to a control method for an electric toothbrush and an electric toothbrush. Background Art

[0002] Electric toothbrushes produce high-frequency vibrations in the brush head through the rapid rotation or vibration of the motor core. Electric toothbrushes include rotary electric toothbrushes and sonic vibration electric toothbrushes.

[0003] At present, electric toothbrushes generally use a single vibration frequency to control the periodic vibration or swing of the motor, wherein the frequency range is usually 200Hz to 300Hz. When the motor drives the toothbrush head to vibrate, the single vibration frequency will produce a relatively single and harsh sound. Summary of the invention

[0004] The invention provides a control method of an electric toothbrush and an electric toothbrush, so as to solve the problem of single vibration frequency of the electric toothbrush in the prior art.

[0005] According to one aspect of the present invention, there is provided a method for controlling an electric toothbrush, comprising:

[0006] Generate a vibration frequency variation curve according to a preset first data time series;

[0007] Adjust the vibration frequency variation curve according to a preset frequency response curve to generate a second data time series;

[0008] generating a vibration source signal according to the second data time series;

[0009] The motor of the electric toothbrush is driven to operate based on the vibration source signal.

[0010] Optionally, generating the vibration frequency change curve according to a preset first data time series includes: performing Fourier transform according to the preset first data time series to generate the vibration frequency change curve.

[0011] Optionally, adjusting the vibration frequency change curve according to a preset frequency response curve to generate a second data time series includes: adjusting the amplitude of the vibration frequency change curve based on the target frequency response characteristics of the motor and the preset frequency response curve; and obtaining the second data time series based on the adjusted vibration frequency change curve.

[0012] Optionally, adjusting the amplitude of the vibration frequency change curve based on the target frequency response characteristics of the motor and the preset frequency response curve includes: obtaining the target frequency response characteristics of the motor; selecting a preset frequency response curve segment in a preset segment of the vibration frequency change curve; and amplifying or reducing the amplitude of a preset segment of the vibration frequency change curve based on the target frequency response characteristics of the motor and the selected preset frequency response curve segment.

[0013] Optionally, generating a vibration source signal according to the second data time series includes: decoding according to the second data time series; and power amplifying based on the decoded second data time series.

[0014] Optionally, the first data time series is an audio signal.

[0015] According to another aspect of the present invention, an electric toothbrush is provided, which includes a processor module, a filter control module, a power amplifier module, a motor, a toothbrush handle and a toothbrush head; the filter control module is connected to the processor module, the power amplifier module is connected to the filter control module, and the motor is connected to the power amplifier module; the processor module, the filter control module, the power amplifier module and the motor are arranged inside the toothbrush handle, the toothbrush head is connected to the toothbrush handle, and the toothbrush head is electrically connected to the motor, the filter control module is used to filter and transform the audio signal, and the motor is used to drive the toothbrush head to vibrate at different frequencies according to the audio signal after the filter transformation, and the amplitude difference of the vibration working in the high frequency zone and the low frequency zone is within a preset range.

[0016] Optionally, the filtering control module includes a first filtering unit, the input end of the first filtering unit is connected to the processor module, the output end of the first filtering unit is connected to the power amplification module, and the first filtering unit is used to perform filtering processing according to the vibration frequency change curve; the first filtering unit includes a first operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor and a second capacitor, the positive input end of the first operational amplifier is connected to the first end of the first resistor and the first end of the first capacitor, the second end of the first resistor is grounded, the second end of the first capacitor is connected to the first end of the second resistor, the first end of the third resistor and the first end of the second capacitor, the second end of the second capacitor is grounded, the second end of the second resistor is connected to the input end of the first filtering unit, the second end of the third resistor is connected to the output end of the first operational amplifier, the output end of the first filtering unit and the first end of the fourth resistor, the second end of the fourth resistor is connected to the negative input end of the first operational amplifier and the first end of the fifth resistor, and the second end of the fifth resistor is grounded.

[0017] Optionally, the filtering control module includes a second filtering unit, the input end of the second filtering unit is connected to the processor module, the output end of the second filtering unit is connected to the power amplification module, and the second filtering unit is used to perform filtering processing according to the vibration frequency change curve; the second filtering unit includes a second operational amplifier, a sixth resistor, a seventh resistor, an eighth resistor, a third capacitor and a fourth capacitor, the negative input end of the second operational amplifier is connected to the first end of the sixth resistor and the first end of the third capacitor, the second end of the sixth resistor is connected to the first end of the fourth capacitor, the output end of the second operational amplifier and the output end of the second filtering unit, the second end of the third capacitor is connected to the second end of the fourth capacitor, the first end of the seventh resistor and the first end of the eighth resistor, the second end of the seventh resistor is connected to the input end of the second filtering unit, the second end of the eighth resistor is grounded, and the positive input end of the second operational amplifier is grounded.

[0018] Optionally, the electric toothbrush further comprises a noise reduction module, wherein the noise reduction module is connected between the power amplification module and the motor, and the noise reduction module is used to reduce the noise of the motor.

[0019] The technical solution of the embodiment of the present invention provides a control method for an electric toothbrush, including: generating a vibration frequency change curve according to a preset first data time series; adjusting the vibration frequency change curve according to a preset frequency response curve to generate a second data time series; generating a vibration source signal according to the second data time series; and driving the motor of the electric toothbrush to operate based on the vibration source signal. The control method for an electric toothbrush provided by the present invention adjusts the vibration frequency change curve through a preset frequency response curve, wherein the preset frequency response curve can be an amplitude-frequency curve of a high-pass or band-pass filter, and according to the amplitude difference between the vibration frequency change curve and the target frequency response characteristic, a segment of the preset frequency response curve is selected to adjust the vibration frequency change curve, which can improve the high-frequency gain, reduce the low-frequency gain, and increase the effective range of the motor motion frequency.

[0020] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 is a flow chart of a control method of an electric toothbrush provided by an embodiment of the present invention;

[0023] Figure 2 is a schematic structural diagram of an electric toothbrush provided by an embodiment of the present invention;

[0024] Figure 3 is a circuit diagram of a filter control module provided by an embodiment of the present invention;

[0025] Figure 4 is a circuit diagram of another filter control module provided by an embodiment of the present invention;

[0026] Figure 5 is a motor frequency response curve diagram provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] The embodiment of the present invention provides a control method for an electric toothbrush. Figure 1 is a flow chart of a control method of an electric toothbrush provided by an embodiment of the present invention, such as Figure 1 As shown, the control method of the electric toothbrush includes:

[0030] S110, generating a vibration frequency variation curve according to a preset first data time series.

[0031] In this embodiment, the first data time series is a sequence formed by compiling numerical values ​​at different times in chronological order. For example, the first data time series is an audio signal, including simulated music or natural sounds, and the audio signal is stored in PCM (Pulse Code Modulation) encoding. The vibration frequency change curve is a frequency response curve. The frequency response curve generally refers to the change of the output electrical signal at different frequencies, indicating the sensitivity to sounds of different frequencies within the working frequency range. The vibration frequency change curve is generated based on the first data time series. Since the first data time series is a time domain signal, the first data time series needs to be converted into the frequency domain to obtain the vibration frequency change curve.

[0032] S120. Adjust the vibration frequency variation curve according to a preset frequency response curve to generate a second data time series.

[0033] In this embodiment, the preset frequency response curve can be a frequency response curve generated by a high-pass filter or a band-pass filter. For example, the frequency response curve generated by the high-pass filter has a large attenuation at low frequencies. As the frequency increases, the output amplitude gradually increases until the cut-off frequency is reached and the output amplitude reaches a maximum value. The frequency response curve generated by the band-pass filter usually presents a passband region, in which the signal amplitude remains relatively stable, and rapidly decays outside the passband. The filter can improve the quality of the signal by enhancing the components of a specific frequency range in the signal. For example, the high-pass filter can enhance the high-frequency components, and the band-pass filter can enhance the components within a specific frequency range. The vibration frequency change curve is adjusted by selecting a segment of the preset frequency response curve to change the amplitude of the vibration frequency change curve, and a second data time series is generated according to the change in the amplitude of the vibration frequency change curve. The second data time series is a sequence formed by compiling values ​​at different times in chronological order, which is a time series after the audio signal is adjusted.

[0034] S130. Generate a vibration source signal according to the second data time series.

[0035] The second data time series is an adjusted audio signal, and a vibration source signal is generated based on the adjusted audio signal, and the vibration source signal is a signal for controlling the motor speed (frequency) of the electric toothbrush. The vibration source signal can be a pulse signal, and the frequency of the pulse signal is proportional to the motor speed. The higher the frequency of the pulse signal, the faster the motor speed and the higher the motor frequency.

[0036] S140. Drive the motor of the electric toothbrush to operate based on the vibration source signal.

[0037] In this embodiment, the vibration source signal is generated based on the adjusted audio signal (second data time series). Compared with the vibration frequency change curve generated based on the initial audio signal (the preset first data time series), the frequency response curve generated by the motor according to the vibration source signal can increase the high-frequency amplitude of the motor when it is running, reduce the low-frequency amplitude, and expand the effective range of the motor's movement frequency.

[0038] The technical solution of this embodiment provides a control method for an electric toothbrush, including: generating a vibration frequency change curve according to a preset first data time series; adjusting the vibration frequency change curve according to a preset frequency response curve to generate a second data time series; generating a vibration source signal according to the second data time series; and driving the motor of the electric toothbrush to operate based on the vibration source signal. The control method for an electric toothbrush provided in this embodiment adjusts the vibration frequency change curve through a preset frequency response curve, wherein the preset frequency response curve can be an amplitude-frequency curve of a high-pass or band-pass filter, and according to the amplitude difference between the vibration frequency change curve and the target frequency response characteristic, a segment of the preset frequency response curve is selected to adjust the vibration frequency change curve, which can increase the high-frequency gain, reduce the low-frequency gain, and increase the effective range of the motor motion frequency.

[0039] On the basis of the above embodiment, a vibration frequency change curve is generated according to a preset first data time series, including: performing Fourier transform according to the preset first data time series to generate a vibration frequency change curve. Among them, Fourier transform is a method of converting a signal from the time domain to the frequency domain, using the transformation principle to quickly convert the continuously changing time domain signal into a frequency domain signal, thereby extracting the frequency characteristics in the time domain signal, and analyzing the frequency composition of the signal. For example, the first data time series is transformed by fast Fourier transform, that is, the time segment of the audio data is quickly identified with frequency characteristics, which can process a large amount of data in real time and efficiently, and generate a vibration frequency change curve based on the transformed frequency domain signal. Among them, there is no limitation on the frequency domain transformation of the signal.

[0040] On the basis of the above embodiment, the vibration frequency change curve is adjusted according to the preset frequency response curve to generate a second data time series, including: adjusting the amplitude of the vibration frequency change curve based on the target frequency response characteristics of the motor and the preset frequency response curve; and obtaining the second data time series based on the adjusted vibration frequency change curve.

[0041] In this embodiment, the target frequency response characteristic of the motor refers to the output response capability of the motor when the input signal frequency changes, which reflects the change of the output voltage or level of the motor at different frequencies, and is an important indicator for measuring the follow-up capability and stability of the motor to signals of different frequencies. The amplitude of the vibration frequency change curve is adjusted based on the target frequency response characteristic of the motor and the preset frequency response curve, and the second data time series is obtained according to the amplitude of the adjusted vibration frequency change curve, so that when the motor is driven by the vibration source signal generated according to the second data time series, the generated frequency response characteristic is close to the target frequency response characteristic.

[0042] Optionally, the amplitude of the vibration frequency change curve is adjusted based on the target frequency response characteristics of the motor and a preset frequency response curve, including: obtaining the target frequency response characteristics of the motor; selecting a preset frequency response curve segment in a preset segment of the vibration frequency change curve; based on the target frequency response characteristics of the motor and the selected preset frequency response curve segment, amplifying or reducing the amplitude of the preset segment of the vibration frequency change curve.

[0043] In this embodiment, the target frequency response characteristic of the motor can be obtained by experiment to obtain the optimal response characteristic of the motor. The amplitude of the vibration frequency change curve is adjusted according to the target frequency response characteristic of the motor and the preset frequency response curve. Specifically, according to the target frequency response characteristic of the motor, a preset frequency response curve segment is selected. After the vibration frequency change curve and the preset frequency response curve are subjected to a preset operation, the amplitude of the preset segment of the vibration frequency change curve can be enlarged or reduced, so that the vibration frequency change curve coincides with the target frequency response characteristic. For example, in the high frequency band, the amplitude of the vibration frequency change curve is less than the amplitude of the target frequency response characteristic, and it is necessary to select a segment of the preset frequency response curve that can enlarge the amplitude of the vibration frequency change curve. In the low frequency band, the amplitude of the vibration frequency change curve is greater than the amplitude of the target frequency response characteristic, and it is necessary to select a segment of the preset frequency response curve that can reduce the amplitude of the vibration frequency change curve. That is, the frequency characteristics of the segment of the preset frequency response curve are multiplied by the data of the vibration frequency change curve of the corresponding segment by an overall linear factor, and frequency-related linear scaling filtering is performed.

[0044] On the basis of the above-mentioned embodiment, a vibration source signal is generated according to the second data time series, including: decoding according to the second data time series; and power amplification based on the decoded second data time series.

[0045] With reference to the above embodiment, the audio signal (first data time series) can be stored in advance, and the vibration frequency change curve can be adjusted by selecting a segment of a preset frequency response curve, and a second data time series (i.e., the adjusted audio signal) can be generated according to the change in the amplitude of the vibration frequency change curve. Decoding the second data time series includes reading the adjusted audio signal, parsing the format of the audio signal, parsing the audio format information stored in the audio signal through a decoder, decoding the audio data, decoding the read audio data through a decoder, and restoring the digital signal to an analog signal. For example, a discrete digital signal is converted into a continuous analog signal through a digital-to-analog converter, so that the audio signal can be output after power amplification to obtain a vibration source signal for controlling the motor frequency.

[0046] The embodiment of the present invention further provides an electric toothbrush, Figure 2 is a schematic diagram of the structure of an electric toothbrush provided by an embodiment of the present invention, such as Figure 2 As shown, the electric toothbrush includes a processor module 10, a filter control module 20, a power amplifier module 30, a motor 40, a toothbrush handle (not shown in the figure) and a toothbrush head (not shown in the figure); the filter control module 20 is connected to the processor module 10, the power amplifier module 30 is connected to the filter control module 20, and the motor 40 is connected to the power amplifier module 30; the processor module 10, the filter control module 20, the power amplifier module 30 and the motor 40 are arranged inside the toothbrush handle, the toothbrush head is connected to the toothbrush handle, and the toothbrush head is electrically connected to the motor, the filter control module 20 is used to filter and transform the audio signal, and the motor is used to drive the toothbrush head to vibrate at different frequencies according to the audio signal after filtering and transformation, and the amplitude difference of the vibration working in the high frequency zone and the low frequency zone is within a preset range.

[0047] In this embodiment, the processor module 10 is a module for data processing such as data storage, data transmission and logical operation. The processor module 10 can be a microcontroller. The microcontroller integrates a central processing unit, memory, counter, interface, etc., and can perform complex control, calculation and data processing tasks. The filter control module 20 is a module for filtering the input signal. For example, the filter control module 20 includes a high-pass filter or a band-pass filter. The power amplifier module 30 is a module for power amplification of the input signal. For example, the power amplifier module 30 includes a power amplifier. The motor 40 is a device that converts electrical energy into mechanical energy to drive the toothbrush head to vibrate. The motor 40 drives the toothbrush head to vibrate at different frequencies according to the audio signal after filtering and transformation (i.e., the second data time series). The amplitude difference between the vibration working in the high-frequency area and the low-frequency area is within a preset range. For example, the preset range of the amplitude difference is 20dB.

[0048] The electric toothbrush provided in this embodiment executes the control method in any of the above embodiments. Referring to the above embodiments, the preset first data time series is stored in the memory of the processor module 10, the processor module 10 generates a vibration frequency change curve according to the preset first data time series, the filter control module 20 adjusts the vibration frequency change curve through the preset frequency response curve, and the processor control module 10 generates a second data time series according to the adjusted vibration frequency change curve. The power amplifier module 30 decodes the second data time series, amplifies the decoded second data time series, generates a vibration source signal, and the motor 40 operates according to the vibration source signal. The control method of the electric toothbrush provided in this embodiment adjusts the vibration frequency change curve through the preset frequency response curve, wherein the preset frequency response curve can be the amplitude-frequency curve of a high-pass or band-pass filter, and according to the amplitude difference between the vibration frequency change curve and the target frequency response characteristic, a segment of the preset frequency response curve is selected to adjust the vibration frequency change curve, which can increase the high-frequency gain, reduce the low-frequency gain, and increase the effective range of the motor movement frequency.

[0049] For example, Figure 3 is a circuit diagram of a filter control module provided by an embodiment of the present invention, such as Figure 3 As shown, the filtering control module 20 includes a first filtering unit, the input end of the first filtering unit is connected to the processor module 10, the output end of the first filtering unit is connected to the power amplifier module 30, and the first filtering unit is used to perform filtering processing according to the vibration frequency change curve. The first filtering unit includes a first operational amplifier U1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1 and a second capacitor C2, the positive input end of the first operational amplifier U1 is connected to the first end of the first resistor R1 and the first end of the first capacitor C1, the second end of the first resistor R1 is grounded, the second end of the first capacitor C1 is connected to the first end of the second resistor R2, the first end of the third resistor R3 and the first end of the second capacitor C2, the second end of the second capacitor C2 is grounded, the second end of the second resistor R2 is connected to the input end of the first filtering unit, the second end of the third resistor R3 is connected to the output end of the first operational amplifier U1, the output end of the first filtering unit and the first end of the fourth resistor R4, the second end of the fourth resistor R4 is connected to the negative input end of the first operational amplifier U1 and the first end of the fifth resistor R5, and the second end of the fifth resistor R5 is grounded. Figure 4 is a circuit diagram of another filter control module provided by an embodiment of the present invention, such as Figure 4As shown, the filtering control module includes a second filtering unit, the input end of the second filtering unit is connected to the processor module 10, the output end of the second filtering unit is connected to the power amplification module 30, and the second filtering unit is used to perform filtering processing according to the vibration frequency change curve; the second filtering unit includes a second operational amplifier U2, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a third capacitor C3 and a fourth capacitor C4, the negative input end of the second operational amplifier U2 is connected to the first end of the sixth resistor R6 and the first end of the third capacitor C3, the second end of the sixth resistor R6 is connected to the first end of the fourth capacitor C4, the output end of the second operational amplifier U2 and the output end of the second filtering unit, the second end of the third capacitor C3 is connected to the second end of the fourth capacitor C4, the first end of the seventh resistor R7 and the first end of the eighth resistor R8, the second end of the seventh resistor R7 is connected to the input end of the second filtering unit, the second end of the eighth resistor R8 is grounded, and the positive input end of the second operational amplifier U2 is grounded.

[0050] Wherein, the first filter unit and the second filter unit are both bandpass filters, and the minimum and maximum cutoff frequencies of the bandpass filter can be changed by adjusting the parameters of the internal resistance and capacitance. For example, the maximum and minimum cutoff frequencies of the preset frequency response curve can be adjusted according to the segment of the vibration frequency change curve to be adjusted, so that the adjusted vibration frequency change curve meets the actual needs. For example, when the segment of the vibration frequency change curve to be adjusted is a high frequency segment, the maximum and minimum cutoff frequencies of the preset frequency response curve can be increased, so that the high frequency segment of the vibration frequency change curve to be adjusted coincides with the maximum and minimum cutoff frequency interval of the preset frequency response curve, thereby increasing the amplitude of the high frequency segment of the vibration frequency change curve to be adjusted.

[0051] The first filter unit and the second filter unit in the above embodiment are hardware circuit filters, and can also be implemented in the form of a filtering algorithm. Exemplarily, the filtering operation can be implemented by a transfer function of a high-pass filter or a band-pass filter, and the specific algorithm includes a Butterworth filtering algorithm (with a smooth frequency response), a Chebyshev filtering algorithm (with a higher steepness in the passband or stopband) or an elliptical filtering algorithm (with a higher steepness in the passband or stopband), etc. The filtering algorithm of this embodiment can be combined with the filtering circuit in the above embodiment.

[0052] Based on the above embodiment, the electric toothbrush further includes a noise reduction module, which is connected between the power amplifier module 30 and the motor 40 and is used to reduce the noise of the motor. The noise reduction module can use a low-pass filter to reduce the high-frequency noise of the motor.

[0053] The working cleaning frequency range in the above embodiment can cover the basic music requirements, such as the frequency range of the 8th syllable in the music score is 261.6Hz~493.8Hz, covering Do, Re, Mi, Fa, Sol, La, Si and lower 8th (130.8Hz~246.9Hz), and higher 8th (523.2~987Hz). Existing electric toothbrush motors usually have a music frequency range that meets the lower 8th. In this embodiment, the electric toothbrush motor at least meets the main music frequency band of 130.8Hz~493.8Hz through the control of the motor by dual control sources. Through higher dynamic capability control, it can meet the higher pitch range of 523.2~987.6Hz, or even above 1046.4Hz, and can maintain sufficient kinetic energy to enable the motor to have a vibration amplitude that meets the cleaning force requirements. By improving the conversion efficiency of the motor's electrical energy and mechanical energy, a higher frequency response can be achieved. That is, by injecting higher energy into the motor to drive it, a higher frequency response can be achieved, so that the frequency response fully covers the frequency range required for music expression, such as the frequency range of bass, mid-range and treble, thus meeting the prerequisites for expressing music.

[0054] When the frequency response range is met, the mid-range and bass can increase the motor's movement amplitude, and the treble will have better sound penetration, but the movement amplitude becomes smaller. In single-frequency music, there are usually ups and downs of high, medium and low. That is, the high-pitched music expression will not be continuous high-pitched, but often changes from mid-bass to treble and then back to mid-bass. Although the short-lived high-pitched sound does not increase the motor's movement amplitude, the adjacent mid-bass has already caused the motor to move in a large amplitude. At this moment, the high-pitched sound is a rapid disturbance in inertial motion, thereby improving the sound penetration and layering, and using the rapidly changing frequency of the audio signal to achieve a fusion of movement amplitude and sound layering.

[0055] Since the frequency response area can be understood as the movement amplitude of the motor under the same supply voltage at different frequencies, Figure 5 is a motor frequency response curve diagram provided by an embodiment of the present invention, such as Figure 5As shown, the thin solid line is the frequency response curve of the motor before adjustment (i.e., the frequency response curve generated according to the first data time series), the thick solid line is the frequency response curve of the bandpass filter (i.e., the preset frequency response curve), and the dotted line represents the frequency response curve after adjustment (i.e., the frequency response curve generated according to the second data time series, which is close to the target frequency response characteristics of the motor). Each frequency in the preset frequency response curve has an amplification factor, and this amplification factor corresponds to the gain value of the frequency. Exemplarily, by changing the amplification factor of the bandpass filter frequency response curve at different frequencies, the output of the motor changes. When the gain value is less than 1, the corresponding frequency is manifested as a weakened motor swing. When the gain = 1, the corresponding frequency motor swing performance is consistent. When the gain > 1, the corresponding frequency motor swing is enhanced. Within the effective working frequency range, by adjusting the curve parameters of the filter, the gain of the low frequency segment can be lowered and the gain of the high frequency segment can be increased. By designing different filter effects, the frequency range of effective cleaning of the motor can be widened. At the same time, by suppressing the working performance of the motor, the swing amplitude can be reduced or avoided to be too large or too small.

[0056] Exemplarily, when simulating the effect of brushing teeth with waves, the frequency domain time series data in the sound of the waves can be extracted, and the motor movement amplitude (vibration source signal) in the frequency change can be adjusted through the filter, and the energy can be lowered in the large movement amplitude interval, and the energy can be raised in the small movement amplitude interval, taking into account the appropriate range of the movement amplitude, and a richer working frequency range can be obtained, so as to express more sound layers. In addition, the pressure of the real-time toothbrush contacting the teeth can be obtained according to the pressure sensor data inside the toothbrush, and the energy injection can be controlled according to the pressure. The movement amplitude is adjusted, and the energy injection is reduced under extremely low pressure to avoid empty brushing, and the energy injection is reduced under extremely high pressure to avoid the impact of excessive resistance and damage to the teeth. The energy injection is adjusted within the appropriate pressure range to produce an automatic tuning effect in which the volume changes with the pressure. It is also possible to obtain the intensity adjustment parameter by adjusting the input path such as the adjustment button, knob, touch screen or touch bar, and the energy injection can also be adjusted by the intensity adjustment parameter to produce a tuning effect that changes with the intensity adjustment parameter.

[0057] In this embodiment, the original audio signal is processed by software digital filtering or filtering circuit, and then the motor is controlled so that the vibration amplitude of the motor becomes larger in the high frequency band and the vibration amplitude decreases in the low frequency band, which can better match the frequency response characteristics of the motor. The original audio signal can be stored in advance. By increasing the driving power, the motor is allowed to work at a higher power under a high-frequency control signal and work at normal or lower power under a low-frequency control signal, and a higher motor frequency response is obtained, that is, the highest operating frequency that meets the cleaning requirements is increased. Thus, under the condition of a larger frequency response range, the frequency range required for music expression is covered, so that music can be used to drive the motor to move directly to obtain cleaning power, while having better sound effects.

[0058] By utilizing the time series combination of the mixed midrange / bass and treble, the midrange / bass drive motor obtains a high movement amplitude while the treble signal generates movement disturbance, and the motor's movement inertia is used reasonably to meet the requirements of both cleaning and music. The movement of the motor directly generates mechanical waves of sound without the need for other parts such as speakers or bone conduction vibrators. The motor is de-single-frequencyed to avoid resonance with human organs.

[0059] On the basis of the above embodiments, an interactive electric toothbrush form can be adopted. For example, the motor is directly driven by sound, so that the motor produces direct interactive feedback, expresses the sound and maintains the cleaning power at the same time. Exemplarily, the new interactive expression can replace voice and text expressions through sound. For example, when brushing in the morning, you need to express the weather forecast, you can directly use the sound expression of the weather without or less language (avoiding the problem of inconvenience caused by inconsistent languages ​​in different countries), that is, today is a thunderstorm, and thunder and rain are used to express it directly. Today is sunny, and birds and insects are used directly. It is also possible to directly generate the voice of memorizing words through the motor according to the needs of students' learning. For specific enthusiasts, such as car lovers, the electric toothbrush is driven by the roar of the car engine. For business awareness, a toothbrush can be used to play today's schedule / news hotspots, etc.

[0060] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0061] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control method for an electric toothbrush, characterized in that: Generate a vibration frequency variation curve according to a preset first data time series; Adjust the vibration frequency variation curve according to a preset frequency response curve to generate a second data time series; generating a vibration source signal according to the second data time series; The motor of the electric toothbrush is driven to operate based on the vibration source signal.

2. The control method of the electric toothbrush according to claim 1, characterized in that: The step of generating a vibration frequency variation curve according to a preset first data time series includes: Fourier transform is performed according to the preset first data time series to generate the vibration frequency change curve.

3. The control method of the electric toothbrush according to claim 1, characterized in that: The step of adjusting the vibration frequency variation curve according to a preset frequency response curve to generate a second data time series includes: adjusting the amplitude of the vibration frequency variation curve based on the target frequency response characteristics of the motor and the preset frequency response curve; The second data time series is obtained based on the adjusted vibration frequency variation curve.

4. The control method of the electric toothbrush according to claim 3, characterized in that: The adjusting the amplitude of the vibration frequency variation curve based on the target frequency response characteristics of the motor and the preset frequency response curve includes: Obtain target frequency response characteristics of the motor; In the preset segment of the vibration frequency variation curve, selecting the preset frequency response curve segment; Based on the target frequency response characteristics of the motor and the selected preset frequency response curve segment, the amplitude of the preset segment of the vibration frequency variation curve is enlarged or reduced.

5. The control method of the electric toothbrush according to claim 1, characterized in that: The step of generating a vibration source signal according to the second data time series comprises: Decoding according to the second data time series; Power amplification is performed based on the decoded second data time series.

6. The control method of the electric toothbrush according to claim 1, characterized in that: The first data time series is an audio signal.

7. An electric toothbrush, characterized in that: The electric toothbrush includes a processor module, a filter control module, a power amplifier module, a motor, a toothbrush handle and a toothbrush head; the filter control module is connected to the processor module, the power amplifier module is connected to the filter control module, and the motor is connected to the power amplifier module; the processor module, the filter control module, the power amplifier module and the motor are arranged inside the toothbrush handle, the toothbrush head is connected to the toothbrush handle, and the toothbrush head is electrically connected to the motor, the filter control module is used to filter and transform the audio signal, and the motor is used to drive the toothbrush head to vibrate at different frequencies according to the audio signal after filtering and transformation, and the amplitude difference of the vibration working in the high frequency zone and the low frequency zone is within a preset range.

8. The electric toothbrush according to claim 7, characterized in that: The filtering control module includes a first filtering unit, the input end of the first filtering unit is connected to the processor module, the output end of the first filtering unit is connected to the power amplification module, and the first filtering unit is used to perform filtering processing according to the vibration frequency change curve; The first filtering unit includes a first operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor and a second capacitor. The positive input terminal of the first operational amplifier is connected to the first end of the first resistor and the first end of the first capacitor, the second end of the first resistor is grounded, the second end of the first capacitor is connected to the first end of the second resistor, the first end of the third resistor and the first end of the second capacitor, the second end of the second capacitor is grounded, the second end of the second resistor is connected to the input terminal of the first filtering unit, the second end of the third resistor is connected to the output terminal of the first operational amplifier, the output terminal of the first filtering unit and the first end of the fourth resistor, the second end of the fourth resistor is connected to the negative input terminal of the first operational amplifier and the first end of the fifth resistor, and the second end of the fifth resistor is grounded.

9. The electric toothbrush according to claim 7, characterized in that: The filtering control module includes a second filtering unit, the input end of the second filtering unit is connected to the processor module, the output end of the second filtering unit is connected to the power amplification module, and the second filtering unit is used to perform filtering processing according to the vibration frequency change curve; The second filtering unit includes a second operational amplifier, a sixth resistor, a seventh resistor, an eighth resistor, a third capacitor and a fourth capacitor. The negative input terminal of the second operational amplifier is connected to the first end of the sixth resistor and the first end of the third capacitor. The second end of the sixth resistor is connected to the first end of the fourth capacitor, the output terminal of the second operational amplifier and the output terminal of the second filtering unit. The second end of the third capacitor is connected to the second end of the fourth capacitor, the first end of the seventh resistor and the first end of the eighth resistor. The second end of the seventh resistor is connected to the input terminal of the second filtering unit. The second end of the eighth resistor is grounded. The positive input terminal of the second operational amplifier is grounded.

10. The electric toothbrush according to claim 7, characterized in that: It also includes a noise reduction module, which is connected between the power amplification module and the motor, and is used to reduce the noise of the motor.

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