CN113017885B - Tooth irrigator and computer-readable storage medium - Google Patents

Tooth irrigator and computer-readable storage medium Download PDF

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CN113017885B
CN113017885B CN202110284732.8A CN202110284732A CN113017885B CN 113017885 B CN113017885 B CN 113017885B CN 202110284732 A CN202110284732 A CN 202110284732A CN 113017885 B CN113017885 B CN 113017885B
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voltage value
motor
pulse width
width modulation
modulation signal
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CN113017885A (en
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孟凡迪
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Shenzhen Sushi Technology Co Ltd
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Shenzhen Sushi Technology Co Ltd
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/02Rinsing or air-blowing devices, e.g. using fluid jets or comprising liquid medication
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/22Improving land use; Improving water use or availability; Controlling erosion

Abstract

The embodiment of the invention discloses an output control method and a system of a tooth flushing device, wherein the method comprises the following steps: sending a pulse width modulation signal to the driving module to control the rotation speed of the motor; acquiring a target voltage value under a current gear, and acquiring an input voltage value of the power supply module according to a preset time interval; adjusting the duty ratio of the pulse width modulation signal according to the ratio of the target voltage value to the input voltage value; and controlling the terminal voltage value of the motor according to the adjusted pulse width modulation signal. By the method, the duty ratio of the pulse width modulation signal can be updated in real time according to the change of the input voltage value of the power supply module, so that the voltages at two ends of the motor reach a stable range, the tooth flushing device can have stable water pressure output, the tooth cleaning effect of the tooth flushing device is improved, and the use experience of a user is improved.

Description

Tooth irrigator and computer-readable storage medium
Technical Field
The invention relates to the technical field of electronics, in particular to an output control system of a tooth flushing device.
Background
The tooth flusher is an auxiliary tool for cleaning oral cavities, mainly utilizes a pulse water flow impact mode to clean teeth and tooth gaps, and mainly utilizes the impact force of a high-speed water column sprayed out under certain pressure to realize the cleaning effect, so that stable water pressure control plays a very critical role in the tooth cleaning effect of the tooth flusher.
Because the output voltage of the battery can change along with the electric quantity, the output power of the motor of the tooth flushing device is difficult to stabilize, the output water pressure of the tooth flushing device is difficult to maintain stable, and the user is easy to feel uncomfortable in the using process.
That is, in the related art, there is a problem in that the output water pressure is unstable for the control of the dental irrigator.
Disclosure of Invention
Based on the above, the invention provides an output control method and system of the tooth flushing device, so that the output water pressure of the tooth flushing device can be kept stable.
An output control method of a tooth flushing device is used for controlling the output water pressure of the tooth flushing device, the tooth flushing device comprises a power supply module, a motor and a driving module, one end of the motor is electrically connected with the power supply module, and the other end of the motor is electrically connected with the driving module; the method comprises the following steps:
sending a pulse width modulation signal to the driving module to control the rotation speed of the motor;
acquiring a target voltage value under a current gear, and acquiring an input voltage value of the power supply module according to a preset time interval;
adjusting the duty ratio of the pulse width modulation signal according to the ratio of the target voltage value to the input voltage value;
and controlling the terminal voltage value of the motor according to the adjusted pulse width modulation signal.
Optionally, in one embodiment, the driving module includes an NMOS transistor and a signal input terminal, where the signal input terminal is connected to a gate of the NMOS transistor, and the signal input terminal is used for inputting a pulse width modulation signal;
the sending a pulse width modulation signal to the drive module to control the rotational speed of the motor comprises:
when high voltage is input to a grid electrode of the NMOS tube, the NMOS tube is conducted;
controlling the conduction time of the NMOS tube according to the duty ratio of the pulse width modulation signal, wherein the average voltage at two ends of the motor is related to the conduction time;
and determining the output power of the motor according to the average voltage at two ends of the motor.
Optionally, in one embodiment, the power module includes a battery, one end of the motor is connected to a positive electrode of the battery, the other end of the motor is connected to a drain of the NMOS transistor, and a source of the NMOS transistor is grounded; the method further comprises the following steps:
when the NMOS tube is conducted, a voltage difference is formed between two ends of the motor to generate a rotation torque.
Optionally, in one embodiment, the adjusting the duty ratio of the pulse width modulation signal according to the ratio of the target voltage value to the input voltage value includes:
according to the formula
DUTY=VT/VBAT
Calculating the duty ratio of the pulse width modulation signal; wherein DUTY is DUTY ratio, VT is target voltage value, and VBAT is input voltage value.
Optionally, in one embodiment, the method further includes: and when the input voltage value of the power supply module is reduced, increasing the duty ratio of the pulse width modulation signal.
Optionally, in one embodiment, the obtaining the input voltage value of the power module according to a preset time interval includes:
and when the tooth flushing device is in a starting state, detecting the input voltage value of the power supply module every 2 seconds, and updating the duty ratio of the pulse width modulation signal according to the input voltage value.
Optionally, in one embodiment, the tooth irrigator is provided with a plurality of gears, and each gear is correspondingly provided with a different target voltage value;
the obtaining of the target voltage value in the current gear includes:
when the current gear is determined to be the first gear, the obtained target voltage value is 1.8V;
when the current gear is determined to be the second gear, the obtained target voltage value is 2.4V;
and when the current gear is determined to be the third gear, the obtained target voltage value is 3V.
An output control system for a dental irrigator, comprising:
the power supply module is used for providing power supply input;
the motor is electrically connected with the power supply module and is used for converting electric energy into mechanical energy so as to drive a transmission structure in the tooth flushing device to perform piston motion and output water pressure;
the driving module is electrically connected with the motor and used for driving the motor to rotate;
and the control module is used for sending a pulse width modulation signal to the driving module so as to control the rotating speed of the motor, calculating a ratio between a target voltage value under the current gear and an input voltage value of the power module, and adjusting the duty ratio of the pulse width modulation signal according to the ratio so as to control the terminal voltage value of the motor to keep stable.
An oral irrigator comprising a memory and a processor, the memory having stored thereon a computer program which, when executed by the processor, causes the processor to carry out the steps of the method according to any one of claims 1 to 7.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
The embodiment of the invention has the following beneficial effects:
after the output control method and the system of the tooth flusher are adopted, the pulse width modulation signal is sent to the driving module to control the rotating speed of the motor, the target voltage value under the current gear is obtained, the input voltage value of the power module is obtained according to the preset time interval, the duty ratio of the pulse width modulation signal is adjusted according to the ratio of the target voltage value to the input voltage value, the terminal voltage value of the motor is controlled according to the adjusted pulse width modulation signal, the duty ratio of the pulse width modulation signal can be updated in real time according to the change of the input voltage value of the power module, and the voltage at two ends of the motor reaches the stable range, so that the tooth flusher can have stable water pressure output, the tooth flushing effect of the tooth flusher is improved, and the use experience of a user is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Wherein:
FIG. 1 is a flow chart of an output control method of a dental irrigator in one embodiment;
FIG. 2 is a flowchart of an output control method of the tooth irrigator in another embodiment;
FIG. 3 is a block diagram of an output control system of the dental irrigator in one embodiment;
FIG. 4 is a schematic electrical diagram of an output control system of the dental irrigator in one embodiment;
FIG. 5 is a graph of duty cycle versus battery charge for one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It will be understood that, as used herein, the terms "first," "second," etc. may be used herein to describe various elements, but these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present application. The first and second elements are both elements, but they are not the same element.
In order to solve the technical problem of unstable output water pressure in the output control technology of the traditional tooth flushing device, in the embodiment, an output control method of the tooth flushing device is particularly provided, which is used for controlling the output water pressure of the tooth flushing device to be in a stable range. The tooth flushing device comprises a power module, a motor and a driving module, wherein one end of the motor is electrically connected with the power module, and the other end of the motor is electrically connected with the driving module. Optionally, the motor may be a motor, and the motor is driven by the power module and the driving module to drive the piston to reciprocate in the pump body through the gear, so that the volume in the pump body changes, water pressure is generated in the pump body, and a high-speed water column is ejected from a nozzle of the tooth irrigator. Fig. 1 is a flowchart of an output control method of the dental irrigator in an embodiment, and the output control method in the embodiment is described by taking the dental irrigator as an example. As shown in fig. 3, the output control method of the tooth irrigator comprises steps 102 to 108:
step 102: and sending a pulse width modulation signal to the driving module to control the rotation speed of the motor.
Pulse Width Modulation (PWM) is a technology for controlling an analog circuit by using digital output of a microprocessor, a motor may be a dc motor, and this embodiment changes a voltage amplitude value transmitted to the motor by adjusting a driving voltage Pulse Width and matching with some corresponding energy storage elements in the circuit, thereby changing a rotation speed of the dc motor.
In a specific embodiment, as shown in fig. 4, a schematic circuit diagram of an output control system of the tooth irrigator in one embodiment is provided, the output control system comprising: the signal input end P05, NMOS pipe U16, motor B1 and battery positive pole VM +, one end of motor B1 is connected with battery positive pole VM +, the other end of motor B1 is connected with the drain electrode of NMOS pipe U16, the source electrode of NMOS pipe U16 is grounded, and the grid electrode of NMOS pipe U16 is connected with signal input end P05. The step of sending a pulse width modulation signal to the driving module to control the rotation speed of the motor further includes steps 1201 to 1203 shown in fig. 2:
step 1201: when a high voltage is input to the grid electrode of the NMOS tube, the NMOS tube is conducted.
Specifically, the mos transistor is a metal-oxide-semiconductor (semiconductor) field effect transistor, and the field effect transistor controls a drain current by using a gate voltage, and has the characteristics of simple driving circuit, low driving power, high switching speed and high operating frequency. When the input PWM signal is high, the grid electrode receives high voltage, and the NMOS tube is conducted. Optionally, a PMOS transistor may be further selected to perform turn-off control on the motor, and similarly, according to the characteristics of the PMOS transistor, when the input PWM signal is "low", the PMOS transistor is turned on.
Step 1202: and controlling the conduction duration of the NMOS tube according to the duty ratio of the pulse width modulation signal, wherein the average voltage at two ends of the motor is related to the conduction duration.
The duty ratio refers to the time ratio of the high level and the low level of the square wave in the pulse width modulation signal, for example, a 20% duty cycle waveform has a high level time of 20% and a low level time of 80%, while a 60% duty cycle waveform has a high level time of 60% and a low level time of 40%, and the higher the duty cycle is, the longer the high level time is, the higher the output pulse amplitude is, i.e., the higher the voltage is. If the duty ratio is 0%, then the high level time is 0, then no voltage is output; if the duty ratio is 100%, the full voltage is output.
Furthermore, the power module comprises a battery, one end of the motor is connected with the positive electrode of the battery, the other end of the motor is connected with the drain electrode of the NMOS tube, and the source electrode of the NMOS tube is grounded; when the NMOS tube is conducted, a voltage difference is formed between two ends of the motor to generate a rotation torque.
Step 1203: and determining the output power of the motor according to the average voltage at two ends of the motor.
The purpose of adjusting the output voltage can be realized by adjusting the duty ratio of the pulse width modulation signal, and further the adjustment of the output power of the motor is realized.
Therefore, the larger the duty ratio of the PWM signal, that is, the larger the pulse width, the larger the average voltage supplied to the motor, and the higher the motor output power. Conversely, the smaller the duty ratio, the smaller the pulse width, the smaller the average voltage supplied to the motor, and the lower the motor output power.
The output control method provided by the embodiment adjusts the output power of the motor by adjusting the duty ratio of the PWM signal, realizes that the analog signal is controlled in a digital manner, and can greatly reduce the cost and power consumption.
Step 104: and acquiring a target voltage value under the current gear, and acquiring an input voltage value of the power module according to a preset time interval.
Wherein, the tooth flushing device is provided with a plurality of gears, and each gear is correspondingly provided with different target voltage values. For example, the tooth flushing device is provided with an opening gear and a closing gear, when a user shifts the switch to the opening gear, the tooth flushing device is started to work, and when the user shifts the switch to the closing gear, the tooth flushing device stops working; the starting gear further comprises three gears which respectively represent a low gear, a medium gear and a high gear, and when the current gear is determined to be the first gear, the obtained target voltage value is 1.8V; when the current gear is determined to be the second gear, the obtained target voltage value is 2.4V; and when the current gear is determined to be the third gear, the obtained target voltage value is 3V. In the embodiment, the target voltage value in the current gear is determined by acquiring the current gear.
Further, when the dental irrigator is in a power-on state, the input voltage value of the power module is obtained according to a preset time interval, for example, the input voltage value of the power module can be detected every 2 seconds, and the duty ratio of the pulse width modulation signal is updated according to the input voltage value. It is understood that other time intervals may be set, and this embodiment is not limited thereto.
Step 106: and adjusting the duty ratio of the pulse width modulation signal according to the ratio of the target voltage value to the input voltage value.
Specifically, after a target voltage value under the current gear and an input voltage value of the power module are obtained, the target voltage value and the input voltage value are calculated according to a formula
DUTY=VT/VBAT
Calculating the duty ratio of the pulse width modulation signal; wherein DUTY is DUTY ratio, VT is target voltage value, and VBAT is input voltage value.
Step 108: and controlling the terminal voltage value of the motor according to the adjusted pulse width modulation signal.
The specific adjustment process is shown in fig. 5, which is a graph of the duty ratio varying with the battery level in one embodiment, wherein the horizontal axis of fig. 5 represents the battery level percentage, and the vertical axis represents the duty ratio of the PWM signal. For example, when the battery is selected as the power input, the battery output voltage is 4.15V when the battery power is 100%, 4.065V when the battery power is 90%, 3.98V when the battery power is 80%, and so on, and 3.385V when the battery power is 10%.
As can be seen from fig. 5, when the input voltage value of the power supply module decreases, the present embodiment can adjust the duty ratio of the pwm signal to increase the duty ratio of the pwm signal, so that the output control system of the dental scaler is more linear and the robustness of the system is enhanced.
According to the output control method of the tooth flusher provided by the embodiment, the pulse width modulation signal is sent to the driving module to control the rotating speed of the motor, the target voltage value under the current gear is obtained, the input voltage value of the power module is obtained according to the preset time interval, the duty ratio of the pulse width modulation signal is adjusted according to the ratio of the target voltage value to the input voltage value, the terminal voltage value of the motor is controlled according to the adjusted pulse width modulation signal, and the duty ratio of the pulse width modulation signal can be updated in real time according to the change of the input voltage value of the power module, so that the voltages at two ends of the motor reach a stable range, the tooth flusher can have stable water pressure output, the tooth flushing effect of the tooth flusher is improved, and the use experience of a user is improved.
The embodiment of the invention also provides a computer readable storage medium. One or more non-transitory computer-readable storage media containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the steps of an output control method of a dental irrigator.
A computer program product containing instructions which, when run on a computer, cause the computer to perform a method of output control of a dental irrigator.
The embodiment of the invention also provides a tooth flushing device, which comprises a memory and a processor, wherein the memory is stored with a computer program, and the tooth flushing device is characterized in that when the computer program is executed by the processor, the processor executes the step of executing the output control method of the tooth flushing device.
Based on the same inventive concept, as shown in fig. 3, an embodiment of the present invention further provides an output control system of a tooth rinsing device, the system comprising: the motor comprises a power module 310, a motor 320, a driving module 330 and a control module 340, wherein one end of the motor 320 is electrically connected with the power module 310, the other end of the motor 320 is electrically connected with the driving module 330, and the control module 340 is respectively electrically connected with the power module 310, the motor 320 and the driving module 330.
Wherein, the power module 310 is used for providing power input; the motor 320 is used for converting electric energy into mechanical energy so as to drive a transmission structure in the tooth flushing device to perform piston motion and output water pressure; the driving module 330 is used for driving the motor 320 to rotate; the control module 340 is configured to send a pulse width modulation signal to the driving module to control the rotation speed of the motor 320, and the control module 340 is further configured to calculate a ratio between a target voltage value in the current gear and an input voltage value of the power module, and adjust a duty ratio of the pulse width modulation signal according to the ratio to control the terminal voltage value of the motor 320 to be stable.
In a specific embodiment, as shown in fig. 4, there is a schematic circuit diagram of an output control system of the tooth irrigator in one embodiment, the output control system comprises: the signal input end P05, NMOS pipe U16, motor B1 and battery positive pole VM +, one end of motor B1 is connected with battery positive pole VM +, the other end of motor B1 is connected with the drain electrode of NMOS pipe U16, the source electrode of NMOS pipe U16 is grounded, and the grid electrode of NMOS pipe U16 is connected with signal input end P05. The duty ratio of a pulse width modulation signal is adjusted by acquiring an input voltage value of a battery anode VM + end and a target voltage value at a current gear according to the ratio of the target voltage value to the input voltage value, and the pulse width modulation signal is input through a signal input end P05 to control the conduction duration of an NMOS tube U16 and further control the terminal voltage value of a motor B1.
The output control system that this embodiment provided can change the duty cycle of updating pulse width modulation signal in real time according to power module's input voltage value, makes the voltage at motor both ends reach stable range to make towards tooth ware can have stable water pressure output, promoted towards the clean tooth effect of tooth ware, and improved user and used experience.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A tooth rinsing device comprises a memory and a processor, wherein a computer program is stored in the memory, and the tooth rinsing device is characterized by comprising a power module, a motor and a driving module, wherein one end of the motor is electrically connected with the power module, and the other end of the motor is electrically connected with the driving module; the computer program, when executed by the processor, causes the processor to perform the steps of an output control method of a dental irrigator, the output control method comprising:
sending a pulse width modulation signal to the driving module to control the rotation speed of the motor;
acquiring a target voltage value under a current gear, and acquiring an input voltage value of the power supply module according to a preset time interval;
according to the formula
DUTY=VT/VBAT
Calculating the duty ratio of the pulse width modulation signal; wherein DUTY is a DUTY ratio, VT is the target voltage value, and VBAT is the input voltage value;
controlling the terminal voltage value of the motor according to the adjusted pulse width modulation signal;
the driving module comprises a signal input end and a PMOS (P-channel metal oxide semiconductor) tube, or the driving module comprises a signal input end or an NMOS (N-channel metal oxide semiconductor) tube, wherein the signal input end is connected with a grid electrode of the PMOS tube or the NMOS tube, and the signal input end is used for inputting a pulse width modulation signal;
when the driving module comprises a PMOS tube, the PMOS tube is conducted when the input PWM signal is low.
2. The dental irrigator of claim 1, wherein when said drive module comprises an NMOS tube, said sending a pulse width modulated signal to said drive module to control the rotational speed of said motor comprises:
when high voltage is input to a grid electrode of the NMOS tube, the NMOS tube is conducted;
controlling the conduction time of the NMOS tube according to the duty ratio of the pulse width modulation signal, wherein the average voltage at two ends of the motor is related to the conduction time;
and determining the output power of the motor according to the average voltage at two ends of the motor.
3. The tooth flushing device of claim 2, wherein the power module comprises a battery, one end of the motor is connected with the positive electrode of the battery, the other end of the motor is connected with the drain electrode of the NMOS tube, and the source electrode of the NMOS tube is grounded; the method further comprises the following steps:
when the NMOS tube is conducted, a voltage difference is formed between two ends of the motor to generate a rotation torque.
4. The dental irrigator of claim 1, wherein the method further comprises:
and when the input voltage value of the power supply module is reduced, increasing the duty ratio of the pulse width modulation signal.
5. The dental irrigator according to claim 1, wherein said obtaining an input voltage value of said power module according to a preset time interval comprises:
and when the tooth flushing device is in a starting state, detecting the input voltage value of the power supply module every 2 seconds, and updating the duty ratio of the pulse width modulation signal according to the input voltage value.
6. The tooth irrigator according to claim 1, wherein a plurality of gears are provided, and each gear is correspondingly provided with a different target voltage value;
the acquiring of the target voltage value under the current gear includes:
when the current gear is determined to be the first gear, the obtained target voltage value is 1.8V;
when the current gear is determined to be the second gear, the obtained target voltage value is 2.4V;
and when the current gear is determined to be the third gear, the obtained target voltage value is 3V.
7. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the steps of an output control method of a dental irrigator, wherein the dental irrigator comprises a power module, a motor and a drive module, one end of the motor is electrically connected to the power module, and the other end of the motor is electrically connected to the drive module, the method comprising:
sending a pulse width modulation signal to the driving module to control the rotation speed of the motor;
acquiring a target voltage value under a current gear, and acquiring an input voltage value of the power module according to a preset time interval;
according to the formula
DUTY=VT/VBAT
Calculating the duty ratio of the pulse width modulation signal; wherein DUTY is a DUTY ratio, VT is the target voltage value, and VBAT is the input voltage value;
controlling the terminal voltage value of the motor according to the adjusted pulse width modulation signal;
the driving module comprises a signal input end and a PMOS (P-channel metal oxide semiconductor) tube, or the driving module comprises a signal input end or an NMOS (N-channel metal oxide semiconductor) tube, wherein the signal input end is connected with a grid electrode of the PMOS tube or the NMOS tube, and the signal input end is used for inputting a pulse width modulation signal;
when the driving module comprises a PMOS tube, the PMOS tube is conducted when the input PWM signal is low.
8. The computer-readable storage medium of claim 7, wherein when the driving module comprises an NMOS transistor, then sending a pulse width modulation signal to the driving module to control the rotation speed of the motor comprises:
when high voltage is input to a grid electrode of the NMOS tube, the NMOS tube is conducted;
controlling the conduction time of the NMOS tube according to the duty ratio of the pulse width modulation signal, wherein the average voltage at two ends of the motor is related to the conduction time;
and determining the output power of the motor according to the average voltage at two ends of the motor.
9. The computer-readable storage medium of claim 8, wherein the power module comprises a battery, one end of the motor is connected to a positive electrode of the battery, the other end of the motor is connected to a drain electrode of the NMOS transistor, and a source electrode of the NMOS transistor is grounded; the method further comprises the following steps:
when the NMOS tube is conducted, a voltage difference is formed between two ends of the motor to generate a rotation torque.
10. The computer-readable storage medium of claim 7, wherein the obtaining the input voltage value of the power module according to the preset time interval comprises:
and when the tooth flushing device is in a starting state, detecting the input voltage value of the power supply module every 2 seconds, and updating the duty ratio of the pulse width modulation signal according to the input voltage value.
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CN114948307A (en) * 2020-09-30 2022-08-30 深圳市巴斯星科技有限公司 Tooth rinsing device, control method thereof and computer readable medium
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