阅读说明：本技术 电动工具的智能调速方法、电动工具及存储介质 (Intelligent speed regulation method for electric tool, electric tool and storage medium ) 是由 赵凤丽 查霞红 高彬彬 倪梯闵 于 2018-08-29 设计创作，主要内容包括：本申请提出一种电能工具的智能调速方法、电动工具及存储介质,电动工具包括驱动电机；其中智能调速方法包括：获取驱动电机当前时刻的第一转速值；根据第一转速值确定驱动电机对应的第一目标驱动占空比；根据第一目标驱动占空比,调整驱动电机的驱动占空比。该方法通过检测驱动电机转速的变化,以确定驱动电机的带载状态,进而根据带载状态调整电机的驱动占空比,从而实现了驱动电机的自动调速,提高了驱动电机的运行效率,提高了电动工具的性能。(The application provides an intelligent speed regulation method of an electric energy tool, an electric tool and a storage medium, wherein the electric tool comprises a driving motor; the intelligent speed regulation method comprises the following steps: acquiring a first rotating speed value of a driving motor at the current moment; determining a first target driving duty ratio corresponding to the driving motor according to the first rotating speed value; and adjusting the driving duty ratio of the driving motor according to the first target driving duty ratio. According to the method, the load state of the driving motor is determined by detecting the change of the rotating speed of the driving motor, and then the driving duty ratio of the motor is adjusted according to the load state, so that the automatic speed regulation of the driving motor is realized, the operating efficiency of the driving motor is improved, and the performance of the electric tool is improved.)

1. The intelligent speed regulating method of the electric tool is characterized in that the electric tool comprises a driving motor;

the intelligent speed regulation method comprises the following steps:

acquiring a first rotation speed value of the driving motor at the current moment;

determining a first target driving duty ratio corresponding to the driving motor according to the first rotating speed value;

and adjusting the driving duty ratio of the driving motor according to the first target driving duty ratio.

2. The method of claim 1, wherein prior to determining the corresponding first target drive duty cycle for the drive motor based on the first speed value, further comprising:

acquiring a current first working voltage of the driving motor;

the determining a first target driving duty ratio corresponding to the driving motor according to the first rotating speed value includes:

and determining a first target driving duty ratio corresponding to the driving motor according to the current first working voltage and the first rotating speed value.

3. The method of claim 1, further comprising:

judging whether the current second working voltage of the driving motor is smaller than a first threshold value or not;

and if so, adjusting the current driving duty ratio to be a first preset driving duty ratio.

4. The method of any of claims 1-3, further comprising:

acquiring a working parameter value and a third working voltage of the driving motor at the current moment, wherein the working parameter comprises at least one of the following parameters: rotation speed, conduction angle and working current;

determining a current second target driving duty ratio according to the working parameter value at the current moment and the third working voltage;

and adjusting the driving duty ratio of the driving motor according to the second target driving duty ratio.

5. The method of any of claims 1-3, wherein determining the first target drive duty cycle for the drive motor based on the first speed value comprises:

determining a target rotating speed range to which the first rotating speed value belongs;

and determining a first target driving duty ratio corresponding to the target rotating speed range according to a preset mapping relation between the rotating speed range and the driving duty ratio.

6. The intelligent speed regulating method of the electric tool is characterized in that the electric tool comprises a driving motor;

the intelligent speed regulation method comprises the following steps:

when a power-on command is received, controlling the driving motor to be powered on at a second preset driving duty ratio;

detecting a rotating speed value of the driving motor in a starting process;

and adjusting the driving duty ratio of the driving motor according to the rotating speed value.

7. The method of claim 6, wherein before adjusting the drive duty cycle of the drive motor based on the speed value, further comprising:

acquiring the actual working voltage of the driving motor in the starting process;

the adjusting the driving duty ratio of the driving motor according to the rotation speed value comprises:

and adjusting the driving duty ratio of the driving motor according to the actual working voltage and the rotating speed value of the driving motor in the starting process.

8. The method of claim 7, wherein said adjusting a drive duty cycle of said drive motor based on said speed value comprises:

and if the change value of the rotating speed value of the driving motor in a first preset time period is larger than a second threshold value, adjusting the driving duty ratio of the driving motor according to a preset step length.

9. The method of claim 8, wherein after adjusting the drive duty cycle of the drive motor according to the preset step size, further comprising:

determining a reference rotating speed range according to the adjusted driving duty ratio;

detecting whether the rotating speed value of the driving motor is in the reference rotating speed range or not;

if not, continuously adjusting the driving duty ratio of the driving motor according to the preset step length.

10. The method of any of claims 6-9, wherein said adjusting a drive duty cycle of said drive motor based on said speed value comprises:

when the actual drive duty ratio of the drive motor is the same as the second preset drive duty ratio and the duration is longer than a third threshold, determining a difference value between the actual rotation speed value of the drive motor and a preset rotation speed value;

determining the current load range of the driving motor according to the difference value between the actual rotating speed value and a preset rotating speed value;

and adjusting the driving duty ratio of the driving motor according to the current load range of the driving motor.

11. The intelligent speed regulating method of the electric tool is characterized in that the electric tool comprises a driving motor;

the intelligent speed regulation method comprises the following steps:

obtaining a working parameter value and a fourth working voltage of the driving motor at the current moment, wherein the working parameter includes at least one of the following parameters: rotation speed, conduction angle and working current;

determining a current third target driving duty ratio according to the working parameter value at the current moment and the fourth working voltage;

and adjusting the driving duty ratio of the driving motor according to the third target driving duty ratio.

12. The method of claim 11, wherein determining a current third target drive duty cycle based on the current operating parameter value and the fourth operating voltage comprises:

determining a set value corresponding to the working parameter;

and determining the current third target driving duty ratio according to the difference value between the working parameter value at the current moment and the set value and the fourth working voltage.

13. An electric power tool, characterized by comprising: memory, processor, drive motor and battery pack, the memory storing a computer program, characterized in that when the processor executes the program, the intelligent speed regulation method of an electric tool according to any one of claims 1 to 12 is implemented.

14. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out an intelligent speed regulation method for an electric tool according to any one of claims 1 to 12.

15. A computer program product, characterized in that it, when executed by a processor, performs the intelligent pacing method for an electric tool according to any one of claims 1 to 12.

Technical Field

The present application relates to the field of electronic technologies, and in particular, to an intelligent speed regulation method for an electric power tool, and a storage medium.

Background

With the development of electronic technology, the electric tool can realize rotation speed adjustment. However, in practical applications, the rotation speed adjustment of most electric tools usually depends on manual adjustment, which not only increases the user operation steps, but also affects the usability of the electric tool even because the speed of the electric tool is not accurately adjusted.

Content of application

The present application is directed to solving, at least to some extent, one of the technical problems in the related art.

To this end, an embodiment of an aspect of the present application provides an intelligent speed regulation method for an electric tool, where the electric tool includes a driving motor; the intelligent speed regulation method comprises the following steps: acquiring a first rotation speed value of the driving motor at the current moment; determining a first target driving duty ratio corresponding to the driving motor according to the first rotating speed value; and adjusting the driving duty ratio of the driving motor according to the first target driving duty ratio.

Another embodiment of the present application provides an intelligent speed regulation method for an electric tool, where the electric tool includes a driving motor; the intelligent speed regulation method comprises the following steps: when a power-on command is received, controlling the driving motor to be powered on at a second preset driving duty ratio; detecting a rotating speed value of the driving motor in a starting process; and adjusting the driving duty ratio of the driving motor according to the rotating speed value.

In another aspect, an embodiment of the present application provides an intelligent speed regulation method for an electric tool, where the electric tool includes a driving motor; the intelligent speed regulation method comprises the following steps: obtaining a working parameter value and a fourth working voltage of the driving motor at the current moment, wherein the working parameter includes at least one of the following parameters: rotation speed, conduction angle and working current; determining a current third target driving duty ratio according to the working parameter value at the current moment and the fourth working voltage; and adjusting the driving duty ratio of the driving motor according to the third target driving duty ratio.

An embodiment of another aspect of the present application provides a power tool, including: the intelligent speed regulating method of the electric tool comprises a memory, a processor, a driving motor and a battery pack, wherein the memory stores computer programs, and when the processor executes the programs, the intelligent speed regulating method of the electric tool is realized.

In an embodiment of another aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the method for intelligently adjusting the speed of the electric tool according to the embodiment of the first aspect is implemented.

In yet another embodiment of the present application, a computer program product is provided, which when executed by a processor, performs the intelligent speed regulation method for an electric tool according to the first embodiment.

According to the intelligent speed regulating method of the electric tool, the electric tool and the storage medium, the load state of the driving motor is determined by detecting the change of the rotating speed of the driving motor, and then the driving duty ratio of the motor is adjusted according to the load state, so that the automatic speed regulation of the driving motor is realized, the operating efficiency of the driving motor is improved, and the performance of the electric tool is improved.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic flow diagram illustrating a method for intelligent speed regulation of a power tool according to an exemplary embodiment of the present application;

FIG. 2 is a flow chart diagram illustrating a method for intelligent speed regulation of a power tool according to another exemplary embodiment of the present application;

FIG. 3 is a flow chart diagram illustrating a method for intelligent governor of a power tool according to yet another exemplary embodiment of the present application;

FIG. 4 is a flow chart diagram illustrating a method for intelligent speed control of a power tool according to an exemplary embodiment of the present application;

FIG. 5 is a schematic flow chart illustrating adjustment of a drive duty cycle of a drive motor based on a speed value according to an exemplary embodiment of the present application;

FIG. 6 is a flow chart diagram illustrating a method for intelligent speed regulation of a power tool according to another exemplary embodiment of the present application;

FIG. 7 is a flow chart diagram illustrating a method for intelligent speed control of a power tool according to an exemplary embodiment of the present application;

FIG. 8 is a schematic diagram of a power tool according to an exemplary embodiment of the present application;

fig. 9 is a schematic structural view of a power tool according to an exemplary embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

The embodiment of the application mainly aims at the problems that in the related technology, when the electric tool is subjected to rotation speed adjustment, manual adjustment is relied on, so that the user operation is more complicated, even the rotation speed of the electric tool is not accurately adjusted, and the use performance of the electric tool is influenced, and provides the intelligent speed adjusting method of the electric tool.

According to the intelligent speed regulating method of the electric tool, the load state of the driving motor is determined by detecting the change of the rotating speed of the driving motor, and then the driving duty ratio of the motor is adjusted according to the load state, so that the automatic speed regulation of the driving motor is realized, the operating efficiency of the driving motor is improved, and the performance of the electric tool is improved.

The following describes an intelligent speed adjusting method for an electric tool, the electric tool, and a storage medium in detail with reference to the accompanying drawings.

First, referring to fig. 1, a detailed description is given of an intelligent speed regulation method for an electric tool according to an embodiment of the present application.

In this embodiment, the power tool may include: driving motor and battery package.

Fig. 1 is a flowchart illustrating an intelligent speed control method for an electric tool according to an exemplary embodiment of the present application. As shown in fig. 1, the intelligent speed regulation method of the electric tool may include the following steps:

step 101, obtaining a first rotation speed value of a driving motor at the current moment.

The intelligent speed regulation method of the electric tool provided by the embodiment of the application can be executed by the electric tool provided by the embodiment of the application so as to adjust the driving duty ratio of the driving motor according to the actual rotating speed value of the driving motor. In this embodiment, the power tool may be, but is not limited to: lawn mowers, electric drills, electric grinders, electric wrenches, electric screwdrivers, concrete vibrators, and the like, which are not specifically limited herein.

Optionally, the rotation speed value at any time in the normal operation process of the driving motor may be obtained in this embodiment. Namely, the embodiment can acquire the rotating speed value of the driving motor in real time.

The detection device for acquiring the first rotation speed value of the driving motor at the current moment may be any one of the following devices: a tachometer, and the like.

As an optional implementation form of the present application, in this embodiment, when the first rotation speed value of the driving motor at the current time is obtained, the power-on instruction may be sent to the control unit by triggering a switch button on the electric tool, so that the control unit controls the driving motor to be powered on according to the power-on instruction and by using a preset driving duty ratio. And then, when the driving motor is started successfully and runs normally, a first rotating speed value of the driving motor at the current moment is obtained through the detection device.

The preset driving duty ratio may be a driving duty ratio corresponding to the driving motor when the driving motor is idle, or may be any driving duty ratio when the driving motor is loaded, and the preset driving duty ratio is not specifically limited herein.

And 102, determining a first target driving duty ratio corresponding to the driving motor according to the first rotating speed value.

And 103, adjusting the driving duty ratio of the driving motor according to the first target driving duty ratio.

Optionally, after the first rotation speed value of the driving motor at the current moment is obtained, the electric tool may find the corresponding first target driving duty ratio in the preset rotation speed-duty ratio mapping relationship according to the first rotation speed value.

And then, according to the determined first target driving duty ratio, adjusting the driving duty ratio of the driving motor so that the driving motor can work according to the driving duty ratio matched with the current running state, and the optimal performance of the driving motor is maximally utilized.

In practical use, if a driving duty ratio is correspondingly set according to a rotation speed value, the performance requirement on the driving motor is higher. Generally, a general driving motor may not meet the high requirement, and therefore, in order to adapt to the working performance of a conventional driving motor, in this embodiment, a rotation speed range may be correspondingly set for each driving duty ratio, so that when an acquired rotation speed value is matched with any rotation speed range, a corresponding driving duty ratio may be determined according to the rotation speed range.

That is, after the first rotation speed value at the current time of the driving motor is acquired, the matching operation is performed by respectively matching the first rotation speed value with a plurality of preset rotation speed ranges. If the first rotation speed value is matched with any rotation speed range, the drive duty ratio corresponding to the rotation speed range can be determined to be the first target drive duty ratio, and therefore the drive duty ratio of the drive motor can be adjusted according to the determined first target drive duty ratio.

That is, when determining the first target driving duty ratio corresponding to the driving motor according to the first rotation speed value, the method includes:

determining a target rotating speed range to which the first rotating speed value belongs;

and determining a first target driving duty ratio corresponding to the target rotating speed range according to a preset mapping relation between the rotating speed range and the driving duty ratio.

In the intelligent speed regulating method of the electric tool provided by this embodiment, the first rotation speed value of the driving motor at the current moment is obtained, the first target driving duty ratio corresponding to the driving motor is determined according to the first rotation speed value, and then the driving duty ratio of the driving motor is adjusted according to the determined first target driving duty ratio. Therefore, the load state of the driving motor is determined by detecting the change of the rotating speed of the driving motor, and the driving duty ratio of the motor is adjusted according to the load state, so that the automatic speed regulation of the driving motor is realized, the operating efficiency of the driving motor is improved, and the performance of the electric tool is improved.

Through the analysis, it can be known that, in the embodiment of the present application, the first target driving duty ratio corresponding to the driving motor is determined according to the first rotation speed value of the driving motor at the current time, and the driving duty ratio of the driving motor is adjusted according to the first target driving duty ratio.

In practical use, the power tool usually comprises a battery pack to provide energy for each device in the power tool through the battery pack, so that the power tool can perform corresponding functional operation. However, when the battery pack actually supplies energy to each device of the electric tool, the power supply may be unstable, and thus the operation of the driving motor and other devices may be unstable. In order to reduce the unstable power supply condition of the battery pack, the present embodiment compensates the unstable voltage supplied by the battery pack by adding voltage compensation, so that the driving motor can always maintain the consistency of the rotation speed during operation. The above process of the intelligent speed regulating method of the electric tool of the present application is specifically described below with reference to fig. 2.

As shown in fig. 2, the intelligent speed regulation method of the electric tool may include the following steps:

step 201, obtaining a first rotation speed value of the driving motor at the current moment.

Step 202, obtaining a current first working voltage of the driving motor.

Optionally, a voltage sensor may be arranged at an output position of the battery pack of the electric tool, so as to obtain an output voltage of the battery pack in the electric tool by using the voltage sensor, and thus a current first working voltage of the driving motor may be determined according to the output voltage of the battery pack; alternatively, the current first operating voltage of the driving motor may be directly obtained by a voltage sensor in the electric power tool and detected, and the present first operating voltage is not particularly limited herein.

And 203, determining a first target driving duty ratio corresponding to the driving motor according to the current first working voltage and the first rotating speed value.

And 204, adjusting the driving duty ratio of the driving motor according to the first target driving duty ratio.

Optionally, after the current first working voltage of the driving motor is obtained, the electric tool may compare the first working voltage with a working voltage when the driving motor actually and normally operates. If the current working voltage of the driving motor is the same as the current working voltage of the driving motor, the current working voltage of the driving motor is stable, otherwise, the current working voltage of the driving motor is unstable.

When it is determined that the current operating voltage of the driving motor is unstable, in order to meet the operating characteristics of the driving motor under different voltages, the embodiment may determine the first target driving duty ratio corresponding to the driving motor according to the current first operating voltage and the first rotation speed value.

That is to say, in this embodiment, when the rotation speed of the driving motor is constant, the corresponding target driving duty ratio can be obtained according to the current working voltage of the driving motor, so as to maintain the consistency of the rotation speed of the driving motor.

And adjusting the driving duty ratio of the driving motor according to the determined first target driving duty ratio.

Further, in practical use, when the control unit controls the driving motor to be powered on according to a preset duty ratio, if the detection device is directly used for obtaining the first rotation speed value of the driving motor at the current moment, the rotation speed of the driving motor may be unstable, so that an error exists in the obtained first rotation speed value, which is not representative. Therefore, in this embodiment, after the driving motor is controlled to be started according to the preset driving duty ratio, whether the current operating rotation speed of the driving motor is stable or not may be determined, and if so, the first rotation speed value of the driving motor at the current moment is obtained through the detection device.

That is to say, this application embodiment still includes: when a power-on command is received, controlling the driving motor to be powered on at a preset driving duty ratio; and acquiring a first rotating speed value of the driving motor when the rotating speed of the driving motor is determined to be kept stable in a preset time period.

And then, adjusting the driving duty ratio of the driving motor according to the acquired current first working voltage and the acquired first rotating speed value of the driving motor.

In the intelligent speed regulating method of the electric tool provided by this embodiment, the first target driving duty ratio corresponding to the driving motor is determined according to the current first working voltage and the first rotation speed value by obtaining the first rotation speed value and the first working voltage of the driving motor at the current moment, and the driving duty ratio of the driving motor is adjusted according to the first target driving duty ratio. From this, realized that when the supply voltage of motor is unstable, electric tool can be according to the intelligent definite drive duty cycle of supply voltage to the rotational speed that makes the motor remains unanimous all the time, thereby improved electric tool's stability in use, improved user experience.

Through the above analysis, it can be known that, in the embodiment of the present application, the first target driving duty ratio corresponding to the driving motor is determined according to the current first operating voltage and the first rotating speed value by obtaining the first rotating speed value and the first operating voltage of the driving motor at the current time, and then the driving duty ratio of the driving motor is adjusted according to the first target driving duty ratio.

In another implementation scenario of the present application, when the power of the battery pack in the power tool is gradually decreased along with the number of times of use and the time of use, and when the power of the battery pack is decreased to a certain threshold, multiple functions of the power tool may not be normally used in an on-load manner. At this time, in order to fully utilize the energy of the battery pack and satisfy the normal operation of the small load and the low power consumption function of the electric tool, the present driving duty ratio of the driving motor may be adjusted in this embodiment, so that the driving motor can still perform the operation of the small load and the low power consumption function when the energy provided by the battery pack is low. The above process of the intelligent speed regulating method of the electric tool of the present application is specifically described below with reference to fig. 3.

As shown in fig. 3, the intelligent speed regulation method of the electric tool may include the following steps:

and 301, acquiring a current second working voltage of the driving motor.

Optionally, a voltage sensor may be arranged at an output position of the battery pack of the electric tool, so as to obtain an output voltage of the battery pack in the electric tool by using the voltage sensor, and thus, a second working voltage of the driving motor may be determined according to the output voltage of the battery pack; alternatively, the current operating voltage of the driving motor may be directly detected by a voltage sensor in the power tool to obtain a current second operating voltage of the driving motor, and the like, which is not limited herein.

Step 302, judging whether the current second working voltage of the driving motor is smaller than a first threshold value, if so, executing step 303, otherwise, returning to step 301.

Step 303, adjusting the current driving duty ratio to a first preset driving duty ratio.

The first threshold value may be a critical voltage value at which the driving motor can normally operate in an on-load state. Accordingly, the first preset driving duty ratio is a duty ratio at which the motor can still operate with a small load or low power consumption at a lower operating voltage, and may be, for example, a 95% duty ratio or a full duty ratio.

In the embodiment of the application, in order to improve the utilization ratio of the electric quantity of the battery pack, when the residual electric quantity of the battery pack is low, the driving duty ratio of the motor can be increased, so that the normal use of the electric tool is ensured. That is, when the current second operating voltage of the driving motor is judged to be smaller than the first threshold, it indicates that the energy output by the battery pack cannot meet the normal on-load operation of the driving motor.

For example, if the first threshold is 15 volts (V), when it is detected that the current second operating voltage of the driving motor is less than 15V, the current driving duty ratio of the driving motor may be adjusted to a full duty ratio (95% -100%), so that the driving motor may perform some operations with small load and low power consumption, thereby fully utilizing the energy of the battery pack and prolonging the service life of the battery pack.

In another embodiment of the present application, the present embodiment may also adjust the driving duty of the driving motor in the following manner.

Optionally, an operating parameter value and a third operating voltage of the driving motor at the current time are obtained, where the operating parameter includes at least one of the following parameters: rotation speed, conduction angle and working current;

determining a current second target driving duty ratio according to the working parameter value at the current moment and the third working voltage;

and adjusting the driving duty ratio of the driving motor according to the second target driving duty ratio.

The third operating voltage specifically refers to an output voltage of the battery pack.

That is to say, this embodiment is through on the basis of current intelligent speed governing technique, through the actual operating voltage according to driving motor, adjusts drive duty cycle to make driving motor's rotational speed more match with actual operating voltage and load, make the adjustment to driving motor's drive duty cycle more have stability, improved driving motor's performance.

In the intelligent speed regulating method of the electric tool provided by this embodiment, when the current second working voltage of the driving motor is smaller than the first threshold, the current driving duty ratio is adjusted to the first preset driving duty ratio. From this, realized when the battery package electric quantity is lower, through adjusting drive duty cycle for great duty cycle to satisfy the normal operating of little load and low-power consumption function, thereby can make full use of battery package energy, long when the use of extension battery package has satisfied the user demand, promoted user experience.

In order to realize the embodiment, the application also provides an intelligent speed regulating method of the electric tool.

Fig. 4 is a flowchart illustrating an intelligent speed control method for an electric tool according to an exemplary embodiment of the present application. As shown in fig. 4, the intelligent speed regulation method for the electric tool of the present application may include the following steps:

and step 401, when a power-on command is received, controlling the driving motor to be powered on at a second preset driving duty ratio.

In practical use, the driving motor can be started in a loading mode when being started, so that intelligent speed regulation in the loading starting process of the driving motor is met. In this embodiment, when the driving motor is started, the driving motor may be controlled to be powered on at a certain driving duty ratio.

Optionally, in this embodiment, the power-on instruction may be sent to the control unit by triggering a switch button on the electrical tool, so that the control unit controls the driving motor to be powered on by using a second preset driving duty ratio according to the power-on instruction.

The second preset driving duty ratio may be adaptively set according to actual needs, which is not specifically limited in this embodiment. E.g., 20%, 50%, etc.

For example, if the second preset driving duty ratio is 50%, the control unit may control the driving motor to perform the power-on operation according to 50% when receiving the power-on command.

Step 402, detecting a rotating speed value of the driving motor in the starting process.

And step 403, adjusting the driving duty ratio of the driving motor according to the rotating speed value.

The embodiment can detect the rotating speed value of the driving motor in the starting process through the detection device, and then the electric tool can adjust the driving duty ratio of the driving motor according to the detected rotating speed value.

The detection device may be any one of the following devices: a tachometer, and the like.

As an optional implementation form of the present application, a load range of the driving motor may be determined according to a rotation speed value of the driving motor in a starting process, and then a driving duty ratio of the driving motor may be adjusted according to the load range. The above-described case will be specifically described with reference to fig. 5.

As shown in fig. 5, the intelligent speed regulating method for an electric tool provided in this embodiment may include the following steps:

and step 501, when a power-on command is received, controlling the driving motor to be powered on at a second preset driving duty ratio.

And 502, when the actual drive duty ratio of the drive motor is the same as the second preset drive duty ratio and the duration is longer than a third threshold, determining the difference value between the actual rotation speed value of the drive motor and the preset rotation speed value.

And 503, determining the current load range of the driving motor according to the difference value between the actual rotating speed value and the preset rotating speed value.

And step 504, adjusting the driving duty ratio of the driving motor according to the current load range of the driving motor.

The third threshold may be adaptively set according to the performance of the driving motor, and this embodiment is not particularly limited thereto. E.g., 200 milliseconds (ms), 300ms, 400ms, etc.

The preset rotation speed value may be adaptively set according to actual needs, and for example, may be set to an idle rotation speed value corresponding to the second preset driving duty ratio, or a rotation speed value at 50% load corresponding to the second preset driving duty ratio, or the like. In this embodiment, the relationship between the rotation speed difference and the load range may be preset, and after the difference between the actual rotation speed value and the preset rotation speed value is determined, the current load range may be determined according to the preset relationship.

For example, if the preset rotation speed value is the idle rotation speed value, the relation between the preset rotation speed difference value and the load range is as follows: the rotating speed difference value n: n is more than or equal to 3000 revolutions per minute (rpm) and belongs to super-large load; n is more than or equal to 1500 and less than 3000rpm, belonging to heavy load; n is more than or equal to 500 and less than 1500rpm, and belongs to medium load; n <500rpm is of small load.

In the embodiment of the application, in the starting process of the driving motor, the driving motor is started through a fixed duty ratio, then the difference value between the actual rotating speed value after the driving is stable and the rotating speed value corresponding to the specific load under the preset fixed duty ratio is determined, and then the relation between the current load and the specific load of the driving motor can be determined according to the difference value, namely the current load range of the driving motor is determined, so that the driving duty ratio of the driving motor can be correspondingly adjusted according to the current load range of the driving motor.

For example, if the second predetermined driving duty ratio is 50% and the third threshold is 200ms, the predetermined rotation speed value is an idle rotation speed value corresponding to the 50% duty ratio, such as 7000 revolutions per minute (rpm). Then, when the actual driving duty ratio of the driving motor is equal to 50% and the duration exceeds 200ma, the electric power tool may control the rotation speed sensor to detect the actual rotation speed value of the driving motor, and make a difference between the actual rotation speed value of the driving motor and the preset rotation speed value. If the actual rotation speed value of the driving motor is 4000rpm, the difference value with the preset rotation speed value is 3000 rpm. At this time, the current load of the driving motor can be determined to be the load, the load range corresponding to 3000rpm is the super load, and the driving duty ratio of the driving motor can be adjusted according to the driving duty ratio corresponding to the super load.

According to the intelligent speed regulating method of the electric tool, when the driving motor is powered on, the driving motor is controlled to be powered on according to the second preset driving duty ratio, the rotating speed value of the driving motor in the starting process is detected, and then the driving duty ratio of the driving motor is adjusted according to the rotating speed value. Therefore, the driving duty ratio of the driving motor in the starting process is intelligently adjusted according to the loading type of the driving motor, the starting performance of the driving motor is improved, the usability of the electric tool is improved, and the user operation is simplified.

Through the analysis, the driving motor is controlled to be powered on at the second preset driving duty ratio, the rotating speed value of the driving motor in the starting process is obtained, and the driving duty ratio of the driving motor is adjusted according to the rotating speed value.

In practical use, when the battery pack actually supplies energy to each device of the electric tool, the situation of unstable power supply exists, so that the work of the driving motor and other devices is unstable. In order to reduce the unstable power supply condition of the battery pack, the present embodiment compensates the unstable voltage supplied by the battery pack by adding voltage compensation, so that the driving motor can always maintain the consistency of the rotation speed during operation. The above process of the intelligent speed regulating method of the electric tool of the present application is specifically described below with reference to fig. 6.

As shown in fig. 6, the intelligent speed regulation method of the electric tool may include the following steps:

step 601, when a power-on command is received, controlling the driving motor to be powered on according to a second preset driving duty ratio.

Step 602, detecting a rotation speed value of the driving motor in a starting process.

Step 603, acquiring the actual working voltage of the driving motor in the starting process.

Optionally, a voltage sensor may be arranged at an output position of the battery pack of the electric tool, so as to obtain an output voltage of the battery pack in the electric tool by using the voltage sensor, and thus an actual working voltage of the driving motor in the starting process can be determined according to the output voltage of the battery pack; alternatively, the actual operating voltage of the driving motor during the starting process may be directly obtained by using a voltage sensor in the power tool for detection, which is not limited in detail herein.

And step 604, adjusting the driving duty ratio of the driving motor according to the actual working voltage and the rotating speed value of the driving motor in the starting process.

Optionally, after the actual working voltage of the driving motor in the starting process is obtained, the electric tool may compare the actual working voltage with the working voltage when the driving motor actually operates normally. If the current working voltage of the driving motor is the same as the current working voltage of the driving motor, the current working voltage of the driving motor is stable, otherwise, the current working voltage of the driving motor is unstable.

When it is determined that the actual working voltage of the driving motor in the starting process is unstable, the driving duty ratio corresponding to the driving motor can be determined according to the actual working voltage and the rotating speed value of the driving motor in the starting process.

That is to say, in this embodiment, when the rotation speed of the driving motor is constant, the corresponding target driving duty ratio can be obtained according to the current working voltage of the driving motor, so as to maintain the consistency of the rotation speed of the driving motor.

Further, the drive duty of the drive motor is adjusted according to the determined drive duty.

In an optional implementation form of the present application, when the driving motor is controlled to perform the power-on operation at the second preset driving duty ratio, and it is detected that a variation value of a rotation speed value of the driving motor in a starting process within a preset time period is greater than a threshold value, it is indicated that the current driving duty ratio is not matched with an actual load state of the driving motor. At this time, it is necessary to adjust the driving duty of the driving motor so that the driving motor operates at an appropriate driving duty.

In actual use, if the variation value of the rotation speed value of the driving motor in the preset time period is large, if the driving duty ratio of the driving motor is directly adjusted to the proper driving duty ratio, sudden change in hearing of a user can be caused, an illusion that the electric tool works abnormally is brought to the user, and normal judgment of the user is influenced. Therefore, in order to reduce abrupt change in user hearing caused by adjustment of the driving duty ratio of the driving motor, the embodiment may adjust the driving duty ratio of the driving motor step by step according to a preset step length to alleviate abrupt change in user hearing.

That is, the present embodiment adjusts the driving duty of the driving motor according to the rotation speed value, including:

and if the change value of the rotating speed value of the driving motor in the first preset time period is larger than the second threshold value, adjusting the driving duty ratio of the driving motor according to the preset step length.

The first preset time period may refer to a time period from starting to normal operation of the driving motor, for example, 300ms, or may be another time period, and the like.

The second threshold may be adaptively set according to actual needs, and is not particularly limited herein.

In this embodiment, the preset step size may be adaptively set according to actual needs, and the like.

For example, if the second threshold is 500rpm, when the rotation speed value of the driving motor changes from 7000rpm to 5000rpm within 300ms of the first preset time period, that is, the change value is 2000rpm, and the corresponding driving duty ratio changes from 20% to 60%, it indicates that the rotation speed change value of the driving motor is greater than the second threshold. At this time, in order to reduce abrupt change in the user's sense of hearing, the power tool may adjust the driving duty at steps of 20% each time, that is, the entire adjustment process is divided into two steps: firstly, adjusting the driving duty ratio of a driving motor from 20% to 40%; and secondly, adjusting the driving duty ratio of the driving motor from 40% to 60%, thereby realizing the purpose of adjusting the driving duty ratio of the driving motor step by step.

Further, in this embodiment, after adjusting the driving duty ratio of the driving motor according to the preset step length, the method further includes:

determining a reference rotating speed range according to the adjusted driving duty ratio;

detecting whether the rotating speed value of the driving motor is in a reference rotating speed range or not;

if not, the driving duty ratio of the driving motor is continuously adjusted according to the preset step length.

That is, after the driving duty ratio of the driving motor is adjusted once, the reference rotation speed range of the adjusted driving duty ratio needs to be determined, so that the rotation speed value of the driving motor after adjustment is matched with the determined reference rotation speed range, and whether the driving duty ratio of the driving motor is continuously adjusted or not is determined according to the matching result.

For example, if the adjusted driving duty ratio is 40% and the corresponding reference rotation speed range is 6500. ltoreq. n.ltoreq.5500, when the rotation speed value of the driving motor is detected to be 6000rpm, it can be determined that the rotation speed value of the driving motor is within the reference range 6500. ltoreq. n.ltoreq.5500, and the operation of adjusting the driving duty ratio of the driving motor is finished.

For another example, if the adjusted driving duty ratio is 40% and the corresponding reference rotation speed range is 6500 ≤ n ≤ 5500, when it is detected that the rotation speed value of the driving motor is 6800rpm, it may be determined that the rotation speed value of the driving motor is not within the reference range 6500 ≤ n ≤ 5500, the driving duty ratio of the driving motor is continuously decreased according to the preset step length, and the above operation of determining the reference rotation speed range corresponding to the adjusted driving duty ratio is continuously repeated after the adjustment, and it is determined whether the rotation speed value of the driving motor is within the reference rotation speed range until the rotation speed value of the driving motor is within the reference rotation speed range.

According to the intelligent speed regulating method of the electric tool, when a power-on instruction is received, the driving motor is controlled to be powered on according to the second preset driving duty ratio, the rotating speed value and the actual working voltage value of the driving motor in the starting process are detected, and the driving duty ratio of the driving motor is adjusted step by step according to the actual working voltage value and the rotating speed value change value of the driving motor in the starting process, so that the driving duty ratio is matched with the load state in the starting process of the driving motor, abrupt change of hearing of a user is avoided, the starting process is stable, the use stability of the electric tool is improved, and the user experience is improved.

In order to realize the embodiment, the application also provides an intelligent speed regulation method of the electric tool.

Fig. 7 is a flowchart illustrating an intelligent speed control method for an electric tool according to an exemplary embodiment of the present application. As shown in fig. 7, the intelligent speed regulation method for an electric tool according to the embodiment of the present application may include the following steps:

step 701, obtaining a working parameter value and a fourth working voltage of the driving motor at the current moment, wherein the working parameter includes at least one of the following parameters: rotation speed, conduction angle and working current.

In this embodiment, the fourth operating voltage refers to an output voltage of the battery pack.

In this embodiment, the working parameter value and the fourth working voltage of the driving motor at the current moment may be obtained through various detection devices provided in the electric tool.

For example, the present embodiment may obtain the rotation speed value of the driving motor at the current moment through a rotation speed sensor or a rotation speed measuring instrument.

For another example, the conduction angle of the driving motor at the current moment may be obtained by the position sensor.

For another example, the current sensor may be used to obtain the current of the driving motor.

It should be noted that, in the present embodiment, the fourth working voltage can be obtained by referring to the above embodiments specifically, and redundant description thereof is not repeated here

Step 702, determining a current third target driving duty ratio according to the current working parameter value and the fourth working voltage.

And 703, adjusting the driving duty ratio of the driving motor according to the third target driving duty ratio.

Optionally, after obtaining the current working parameter value of the driving motor, that is, the fourth working voltage, the electric tool may determine the current third target driving duty ratio according to the current working parameter value and the fourth working voltage, and adjust the driving duty ratio of the driving motor according to the third target driving duty ratio.

As an optional implementation manner of the present application, when determining the current third target driving duty ratio, the present embodiment may further determine the current third target driving duty ratio by determining a set value corresponding to the working parameter, and according to a difference between the working parameter value and the set value at the present time and the fourth working voltage.

That is to say, in this embodiment, the difference value is obtained by subtracting each working parameter of the driving motor at the current time from the corresponding set value, so as to determine the current third target driving duty ratio according to the difference value and the fourth working voltage, and the driving duty ratio of the driving motor can be adjusted more accurately and reliably.

In the intelligent speed regulating method of the electric tool provided by this embodiment, the current third target driving duty ratio is determined according to the current working parameter value and the fourth working voltage of the driving motor by obtaining the current working parameter value and the fourth working voltage of the driving motor, and the driving duty ratio of the driving motor is adjusted according to the third target driving duty ratio. From this, not only make electric tool can realize intelligent speed governing, can also guarantee that electric tool has stable voltage for electric tool is higher at the use reliability, thereby has promoted electric tool's practicality.

In order to realize the above embodiment, the present application also proposes an electric tool.

Fig. 8 is a schematic structural view of a power tool according to an exemplary embodiment. The power tool shown in fig. 9 is merely an example, and should not bring any limitation to the function and the range of use of the embodiment of the present application.

Referring to fig. 8, the power tool of the present application may include: a memory 210, a processor 220, a drive motor 230, a battery pack 240, the memory 210 storing a computer program which, when executed by the processor 220, causes the processor 220 to perform the steps of: acquiring a first rotation speed value of the driving motor at the current moment; determining a first target driving duty ratio corresponding to the driving motor according to the first rotating speed value; adjusting the drive duty cycle of the drive motor according to the first target drive duty cycle; or when a power-on command is received, controlling the driving motor to be powered on at a second preset driving duty ratio; detecting a rotating speed value of the driving motor in a starting process; adjusting the driving duty ratio of the driving motor according to the rotating speed value; or acquiring a working parameter value and a fourth working voltage of the driving motor at the current moment, wherein the working parameter includes at least one of the following parameters: rotation speed, conduction angle and working current; determining a current third target driving duty ratio according to the working parameter value at the current moment and the fourth working voltage; and adjusting the driving duty ratio of the driving motor according to the third target driving duty ratio.

In an exemplary embodiment, before determining the first target driving duty ratio corresponding to the driving motor according to the first rotation speed value, the method further includes: acquiring a current first working voltage of the driving motor; the determining a first target driving duty ratio corresponding to the driving motor according to the first rotating speed value includes: and determining a first target driving duty ratio corresponding to the driving motor according to the current first working voltage and the first rotating speed value.

In an exemplary embodiment, further comprising: judging whether the current second working voltage of the driving motor is smaller than a first threshold value or not; and if so, adjusting the current driving duty ratio to be a first preset driving duty ratio.

In an exemplary embodiment, further comprising: acquiring a working parameter value and a third working voltage of the driving motor at the current moment, wherein the working parameter comprises at least one of the following parameters: rotation speed, conduction angle and working current; determining a current second target driving duty ratio according to the working parameter value at the current moment and the third working voltage; and adjusting the driving duty ratio of the driving motor according to the second target driving duty ratio.

In an exemplary embodiment, the determining a first target driving duty ratio corresponding to the driving motor according to the first rotation speed value includes: determining a target rotating speed range to which the first rotating speed value belongs; and determining a first target driving duty ratio corresponding to the target rotating speed range according to a preset mapping relation between the rotating speed range and the driving duty ratio.

In an exemplary embodiment, before the adjusting the driving duty ratio of the driving motor according to the rotation speed value, the method further includes: acquiring the actual working voltage of the driving motor in the starting process; the adjusting the driving duty ratio of the driving motor according to the rotation speed value comprises: and adjusting the driving duty ratio of the driving motor according to the actual working voltage and the rotating speed value of the driving motor in the starting process.

In an exemplary embodiment, the adjusting the driving duty ratio of the driving motor according to the rotation speed value includes: and if the change value of the rotating speed value of the driving motor in a first preset time period is larger than a second threshold value, adjusting the driving duty ratio of the driving motor according to a preset step length.

In an exemplary embodiment, after the adjusting the driving duty ratio of the driving motor according to the preset step size, the method further includes: determining a reference rotating speed range according to the adjusted driving duty ratio; detecting whether the rotating speed value of the driving motor is in the reference rotating speed range or not; if not, continuously adjusting the driving duty ratio of the driving motor according to the preset step length.

In an exemplary embodiment, the adjusting the driving duty ratio of the driving motor according to the rotation speed value includes: when the actual drive duty ratio of the drive motor is the same as the second preset drive duty ratio and the duration is longer than a third threshold, determining a difference value between the actual rotation speed value of the drive motor and a preset rotation speed value; determining the current load range of the driving motor according to the difference value between the actual rotating speed value and a preset rotating speed value; and adjusting the driving duty ratio of the driving motor according to the current load range of the driving motor.

In an exemplary embodiment, the determining a current third target driving duty ratio according to the current operating parameter value and the fourth operating voltage includes: determining a set value corresponding to the working parameter; and determining the current third target driving duty ratio according to the difference value between the working parameter value at the current moment and the set value and the fourth working voltage.

In an alternative implementation form, as shown in fig. 9, the power tool 200 may further include: a memory 210 and a processor 220, a bus 230 connecting different components (including the memory 210 and the processor 220), wherein the memory 210 stores a computer program, and when the processor 220 executes the program, the intelligent speed regulating method of the electric tool according to the embodiment of the present application is implemented.

Bus 230 represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, and a processor or local bus using any of a variety of bus architectures. By way of example, such architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, micro-channel architecture (MAC) bus, enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.

The power tool 200 typically includes a variety of computer device readable media. These media may be any available media that can be accessed by the power tool 200 and includes both volatile and nonvolatile media, removable and non-removable media.

Memory 210 may also include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM)240 and/or cache memory 250. The power tool 200 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 260 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 9, and commonly referred to as a "hard drive"). Although not shown in FIG. 9, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 230 by one or more data media interfaces. Memory 210 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the application.

A program/utility 280 having a set (at least one) of program modules 270, including but not limited to an operating system, one or more application programs, other program modules, and program data, each of which or some combination thereof may comprise an implementation of a network environment, may be stored in, for example, the memory 210. The program modules 270 generally perform the functions and/or methodologies of the embodiments described herein.

The power tool 200 may also communicate with one or more external devices 290 (e.g., keyboard, pointing device, display 291, etc.), with one or more devices that enable a user to interact with the power tool 200, and/or with any devices (e.g., network card, modem, etc.) that enable the power tool 200 to communicate with one or more other computing devices. Such communication may occur via input/output (I/O) interfaces 292. Also, the power tool 200 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the internet) via the network adapter 293. As shown, the network adapter 293 communicates with the other modules of the power tool 200 via the bus 230. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the power tool 200, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.

It should be noted that, for the implementation process and the technical principle of the electric tool of the present embodiment, reference is made to the foregoing explanation of the embodiment of the intelligent speed regulating method of the electric tool, and details are not described here again.

The electric tool provided by the embodiment of the application determines the loading state of the driving motor by detecting the change of the rotating speed of the driving motor, and further adjusts the driving duty ratio of the motor according to the loading state, so that the automatic speed regulation of the driving motor is realized, the operating efficiency of the driving motor is improved, and the performance of the electric tool is improved.

In order to implement the above embodiments, the present application also proposes a computer-readable storage medium.

The computer readable storage medium has a computer program stored thereon, and the program, when executed by a processor, implements the intelligent speed regulating method for the electric tool according to the embodiment of the first aspect.

In order to implement the above embodiments, the present application also proposes a computer program product.

When executed by a processor, the computer program product performs the intelligent speed regulation method for the electric tool according to the embodiment of the first aspect.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.

It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.