阅读说明：本技术 智能电动工具及其控制方法 (Intelligent electric tool and control method thereof ) 是由 王鹏臣 于 2020-04-28 设计创作，主要内容包括：本发明实施例公开了一种智能电动工具及其控制方法,该智能电动工具包括：输出轴,用于输出扭力；电机,用于驱动输出轴转动；壳体,用于容纳电机；传动组件,传动组件连接电机和输出轴；调节组件,用于调节智能电动工具的工作模式,其中,工作模式至少包括金属模式；检测单元,用于检测获得智能电动工具在工作中的电流值；控制器,用于根据智能电动工具在工作中的电流值确定第一检测值和第二检测值；根据第一检测值和/或第二检测值控制电机停转,以控制智能电动工具停机。解决现有技术存在不能满足多种工况下的自动停机、工作效率低的问题,实现智能电动工具能够适应多种不同的工况,提高工作效率的效果。(The embodiment of the invention discloses an intelligent electric tool and a control method thereof, wherein the intelligent electric tool comprises: an output shaft for outputting torque; the motor is used for driving the output shaft to rotate; a housing for accommodating the motor; the transmission assembly is connected with the motor and the output shaft; the adjusting assembly is used for adjusting the working modes of the intelligent electric tool, wherein the working modes at least comprise a metal mode; the detection unit is used for detecting and obtaining the current value of the intelligent electric tool in the working process; the controller is used for determining a first detection value and a second detection value according to the current value of the intelligent electric tool in operation; and controlling the motor to stop according to the first detection value and/or the second detection value so as to control the intelligent electric tool to stop. The problem of prior art exist can not satisfy auto-stop, work efficiency under the multiple operating mode low is solved, realize that intelligent electric tool can adapt to multiple different operating modes, improves work efficiency's effect.)

1. An intelligent power tool for driving a fastener into a workpiece, the intelligent power tool comprising:

an output shaft for outputting torque;

the motor is used for driving the output shaft to rotate;

a housing for accommodating the motor;

a transmission assembly connecting the motor and the output shaft;

the adjusting assembly is used for adjusting the working modes of the intelligent electric tool, and the working modes at least comprise a metal mode;

the detection unit is used for detecting and obtaining the current value of the intelligent electric tool in operation;

the controller is used for determining a first detection value and a second detection value according to the current value of the intelligent electric tool in operation;

and controlling the motor to stop according to the first detection value and/or the second detection value meeting a preset condition so as to control the intelligent electric tool to stop.

2. The intelligent power tool of claim 1, wherein the first detection value comprises a rate of change of current, and wherein determining the first detection value based on the current value of the intelligent power tool in operation comprises:

calculating a difference value between the maximum current value and the minimum current value according to the maximum current value and the minimum current value of the current values of the intelligent electric tool sampled in a first preset time window, and dividing the difference value between the maximum current value and the minimum current value by the minimum current value after multiplying a preset multiple to obtain a first detection value; alternatively, the first and second electrodes may be,

and calculating the difference value between the current value at the end moment of the second preset time window and the current value at the start moment of the second preset time window according to the current value at the end moment of the second preset time window and the current value at the start moment of the second preset time window sampled in the second preset time window to obtain the first detection value.

3. The intelligent power tool of claim 1, wherein the second detection value comprises a current trend value, and wherein determining the second detection value based on the current value of the intelligent power tool during operation comprises:

calculating the difference value between the current value of the current moment and the current value of the previous moment which are continuously adjacent according to the current value of the intelligent electric tool at each moment sampled in a third preset time window, and dividing the difference value between the current value of the current moment and the current value of the previous moment to obtain a second detection value of the current moment;

and if the second detection value at the current moment is smaller than zero, taking the second detection value at the previous moment as the second detection value at the current moment.

4. The intelligent power tool of claim 1, further comprising, before the intelligent power tool triggers a shutdown: if the first detection value continuously decreases more than two times within the first preset time, the first detection value after the second decreasing is smaller than or equal to the first preset value, and the first detection value at the later sampling moment is smaller than or equal to zero, the intelligent electric tool is started successfully.

5. The intelligent electric tool according to claim 1, wherein the controlling the motor to stop rotating according to the first detection value and/or the second detection value meeting a preset condition to control the intelligent electric tool to stop comprises:

after the peak value of the first detection value occurs, if the first detection value is larger than or equal to a second preset value after the sampling period of M first detection values occurs, and the first detection value is continuously decreased twice after the first detection value is larger than or equal to the second preset value, the intelligent electric tool is triggered to stop; alternatively, the first and second electrodes may be,

after the sampling period of the M first detection values, if the first detection value is smaller than or equal to a third preset value, triggering the intelligent electric tool to stop; wherein M is a positive integer, and the third preset value is smaller than the second preset value.

6. The intelligent power tool of claim 1, wherein the controlling the motor to stall based on the first detection value and/or the second detection value to control the intelligent power tool to stall further comprises:

and after the first detection value is larger than or equal to a fourth preset value after the sharp peak value of the first detection value and the steep peak value of the first detection value occur, triggering the intelligent electric tool to stop.

7. The intelligent power tool of claim 1, wherein the controlling the motor to stall based on the first detection value and/or the second detection value to control the intelligent power tool to stall further comprises: after a sharp peak value of the first detection value and a steep peak value of the first detection value occur, the first detection value is smaller than or equal to a fifth preset value, the first detection value continuously increases three times after the first detection value is smaller than or equal to the fifth preset value, and the first detection value which is increased last time is larger than or equal to zero, and then the intelligent electric tool triggers shutdown; alternatively, the first and second electrodes may be,

when the first detection value is larger than or equal to a fourth preset value under the condition that a sharp peak value of the first detection value occurs and a steep peak value of the first detection value does not occur, and the first detection value is larger than or equal to a sixth preset value after the first detection value is larger than or equal to the fourth preset value, the intelligent electric tool triggers shutdown, wherein the sixth preset value is larger than the fourth preset value, and the fourth preset value is larger than the fifth preset value; alternatively, the first and second electrodes may be,

after the occurrence of a sharp peak value of the first detection value and a steep peak value of the first detection value, the occurrence of a second detection value greater than or equal to a seventh preset value, and during a sampling period of N first detection values after the occurrence of the second detection value greater than or equal to the seventh preset value: if the first detection value is larger than or equal to an eighth preset value, triggering the intelligent electric tool to stop, wherein the eighth preset value is smaller than the seventh preset value; if the first detection value is not larger than or equal to the eighth preset value, re-detection is carried out; alternatively, the first and second electrodes may be,

in the case where a sharp peak value of the first detection value occurs and a sharp peak value of the first detection value does not occur, it occurs that a maximum value of the second detection value occurring in sampling periods of two consecutive second detection values is greater than or equal to a ninth preset value, a minimum value of the second detection value is greater than or equal to a tenth preset value, and in the sampling period of N first detection values after the maximum value of the second detection value occurring in the sampling periods of two consecutive second detection values is greater than or equal to the ninth preset value: if the first detection value is larger than or equal to an eighth preset value, triggering the intelligent electric tool to stop; if the first detection value is not larger than or equal to the eighth preset value, re-detection is carried out; and the tenth preset value is smaller than the ninth preset value, and N is a positive integer.

8. The intelligent power tool of claim 1, wherein the controlling the motor to stall based on the first and/or second detection values to control the intelligent power tool to stall further comprises:

after the peak value of the first detection value occurs, if the second detection value is larger than or equal to an eleventh preset value, triggering the intelligent electric tool to stop; alternatively, the first and second electrodes may be,

and in a sampling period of N first detection values after the peak value of the first detection value does not appear and the second detection value is greater than or equal to the eleventh preset value: if the first detection value is larger than or equal to an eighth preset value, triggering the intelligent electric tool to stop; if the first detection value is not larger than or equal to the eighth preset value, re-detection is carried out; alternatively, the first and second electrodes may be,

if the peak value of the first detection value does not appear but the maximum value of the second detection value appears in the sampling period of two consecutive second detection values, the maximum value of the second detection value is greater than or equal to a twelfth preset value, and the minimum value of the second detection value is greater than or equal to the sampling period of N first detection values after the tenth preset value: if the first detection value is larger than or equal to the eighth preset value, triggering the intelligent electric tool to stop; if the first detection value is not larger than or equal to the eighth preset value, re-detection is carried out; wherein the tenth preset value is smaller than the twelfth preset value, and N is a positive integer.

9. The intelligent power tool according to claim 6 or 7, wherein the occurrence of a steep peak of the first detection value comprises:

and after a sharp peak value of the first detection value occurs, if the first detection value is larger than or equal to a thirteenth preset value, and the first detection value is smaller than or equal to a fourteenth preset value after the first detection value is larger than or equal to the thirteenth preset value, a sharp peak value of the first detection value occurs, wherein the fourteenth preset value is smaller than the thirteenth preset value.

10. The intelligent power tool according to any one of claims 5 to 9, wherein the occurrence of a peak value of the first detection value comprises:

within a second preset time after the intelligent electric tool is successfully started, if the first detection value is larger than or equal to a fifteenth preset value, the first detection value continuously decreases twice after the first detection value is larger than or equal to the fifteenth preset value, and the first detection value is larger than or equal to zero after the first detection value continuously decreases twice, a peak value of the first detection value occurs, wherein the fifteenth preset value is larger than zero.

11. A control method of an intelligent power tool, the control method comprising: acquiring a current value of the intelligent electric tool in working;

determining a first detection value and a second detection value according to the current value of the intelligent electric tool in operation;

and if the first detection value and/or the second detection value meet a preset condition, triggering the intelligent electric tool to stop.

Technical Field

The embodiment of the invention relates to the technical field of electric tool control, in particular to an intelligent electric tool and a control method thereof.

Background

With the development of intelligent control technology, the intelligent control technology of electric tools is more and more widely applied. For example, a screw driver of an electric drill drives a motor by using a controller to realize the assembly, disassembly and other work of a fastener.

However, when the electric drill screwdriver is used in a working process, for example, when a metal screw is driven into a multi-layer steel plate or a multi-layer wood plate, the screw is driven to the bottom, if the electric drill screwdriver cannot be stopped in time, the screw may slip, the screw may loosen, and the like, and further the fastening of the steel plate or the wood plate may be affected. In the prior art, a preset position threshold value is generally set according to working conditions, and whether the machine is stopped or not is determined by judging whether a trigger position exceeds the preset position threshold value or not. However, the method cannot meet the automatic shutdown under various working conditions, and further reduces the working efficiency.

Disclosure of Invention

The invention provides an intelligent electric tool and a control method thereof, which are used for controlling a motor to stop according to a first detection value and/or a second detection value of the electric tool so as to control the intelligent electric tool to stop, can adapt to various different working conditions and improve the working efficiency.

In a first aspect, an embodiment of the present invention provides an intelligent power tool, including:

an output shaft for outputting torque;

the motor is used for driving the output shaft to rotate;

a housing for accommodating the motor;

a transmission assembly connecting the motor and the output shaft;

the adjusting assembly is used for adjusting the working modes of the intelligent electric tool, and the working modes at least comprise a metal mode;

the detection unit is used for detecting and obtaining the current value of the intelligent electric tool in operation;

the controller is used for determining a first detection value and a second detection value according to the current value of the intelligent electric tool in operation;

and controlling the motor to stop according to the first detection value and/or the second detection value so as to control the intelligent electric tool to stop. In a second aspect, an embodiment of the present invention further provides a control method for an intelligent electric tool, where the control method includes: acquiring a current value of the intelligent electric tool in working;

determining a first detection value and a second detection value according to the current value of the intelligent electric tool in operation;

and if the first detection value and/or the second detection value meet a preset condition, triggering the intelligent electric tool to stop. According to the technical scheme provided by the embodiment of the invention, the intelligent electric tool is used for driving a fastener into a workpiece and comprises: an output shaft for outputting torque; the motor is used for driving the output shaft to rotate; a housing for accommodating the motor; the transmission assembly is connected with the motor and the output shaft; the adjusting assembly is used for adjusting the working modes of the intelligent electric tool, wherein the working modes at least comprise a metal mode; the detection unit is used for detecting and obtaining the current value of the intelligent electric tool in the working process; the controller is used for determining a first detection value and a second detection value according to the current value of the intelligent electric tool in operation; and controlling the motor to stop according to the first detection value and/or the second detection value so as to control the intelligent electric tool to stop. The problem of prior art exist can not satisfy auto-stop, work efficiency low under the multiple operating mode, realize according to intelligent electric tool's first detected value and/or second detected value control motor stall with control intelligent electric tool and shut down, can adapt to the operating mode of multiple difference, improve work efficiency is solved.

Drawings

Fig. 1 is a schematic structural diagram of an intelligent electric tool according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of another intelligent power tool provided by an embodiment of the invention;

fig. 3 is a flowchart of a method for calculating a first detection value of an intelligent power tool according to an embodiment of the present invention;

fig. 4 is a flowchart of a method for calculating a second detection value of an intelligent power tool according to an embodiment of the present invention;

fig. 5 is a flowchart of a control method of an intelligent electric tool according to an embodiment of the present invention. The structure is schematic.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a schematic structural diagram of an intelligent electric tool according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram of another intelligent electric tool according to an embodiment of the present invention. The intelligent power tool is used for driving a fastener into a workpiece, and referring to fig. 1 and 2, the intelligent power tool 100 includes: an output shaft 110 for outputting a torque force; a motor 210 for driving the output shaft 110 to rotate; a housing 120 for accommodating a motor; the transmission assembly is used for connecting the motor and the output shaft;

the adjusting component 130 is used for adjusting the working modes of the intelligent tool, wherein the working modes at least comprise a metal mode, and the metal mode is suitable for the working conditions that harder materials such as aluminum plates and thin steel plates need to be drilled and screwed; in addition, the working modes of the intelligent electric tool can also comprise a woodworking mode, a drilling gear mode and a common gear mode. The woodworking mode is suitable for drilling and screwing the softer wood materials such as plastics, wood boards and the like; the drill stop mode is suitable for the situation that only holes are drilled, such as wood plates, metal plates and the like; the normal mode is applicable to the various modes described above.

The detection unit 220 is used for acquiring the current value of the intelligent electric tool in operation;

the controller 230 is used for determining a first detection value and a second detection value according to the current value of the intelligent electric tool in operation and controlling the intelligent electric tool to operate, and the controller controls the intelligent electric tool to operate in a speed reduction mode or a rotation stop mode at a preset speed when a fastener acted by the intelligent electric tool is bottomed out;

the controller 230 controls the motor 210 to stop according to the first detection value and/or the second detection value to control the intelligent electric tool to stop.

It should be noted that, in the embodiment of the present invention, the detection unit 220 is provided separately from the controller 230, and in other embodiments, the detection unit 220 and the controller 230 may also be integrated into a whole.

Referring to fig. 1, the intelligent power tool 100 includes a housing 120, an output shaft 110, a grip 140, a speed regulating mechanism 150, a power supply device 160, a motor, and a controller.

The housing 120 is formed with a grip portion 140, and the grip portion 140 is gripped by a user, but the grip portion 140 may be a separate part. The housing 120 constitutes a main body portion of the intelligent power tool 100 for housing the motor, controller, transmission assembly, and other electronic components such as a circuit board. The output shaft 110 may be used to mount a function.

The functional component is used for realizing the functions of the intelligent electric tool 100, and the functional component is driven by the motor to operate. The functional elements are different for different intelligent power tools. For the screwdriver, the functional part is a sleeve used for realizing the functions of fastening the screw or disassembling the screw. The functional element is operatively connected to the motor, and in particular, the functional element is electrically connected to the motor through the output shaft 110 and the transmission assembly.

The speed-adjusting mechanism 150 is at least used for setting a target rotation speed of the motor, that is, the speed-adjusting mechanism 150 is used for realizing speed adjustment of the motor, and the speed-adjusting mechanism 150 can be, but is not limited to, a trigger, a knob, a sliding mechanism, etc. In the present embodiment, the speed adjusting mechanism 150 is configured as a slide mechanism. By obtaining the output signal of the speed regulating mechanism, it can be determined whether the intelligent electric tool 100 is currently in the set speed mode. For example, by acquiring an output signal of the trigger switch, it is possible to determine whether the trigger switch is in a set pressing angle range, thereby determining whether the power tool is in a set speed mode.

The power supply device 160 is used to supply power to the intelligent power tool 100. In the present embodiment, the smart power tool 100 is powered by a battery pack. Optionally, the intelligent power tool 100 further comprises a battery pack coupling portion for coupling a battery pack to the intelligent power tool 100.

The motor and the controller of the intelligent power tool 100 are disposed in the housing 120 (not shown in fig. 1), and the motor is used for driving the corresponding functional components to operate in response to the control signal of the controller, so that the intelligent power tool 100 can operate normally.

According to the technical scheme provided by the embodiment of the invention, the intelligent electric tool is used for driving a fastener into a workpiece and comprises: an output shaft for outputting torque; the motor is used for driving the output shaft to rotate; a housing for accommodating the motor; the transmission assembly is connected with the motor and the output shaft; the adjusting assembly is used for adjusting the working modes of the intelligent electric tool, wherein the working modes at least comprise a metal mode; the detection unit is used for detecting and obtaining the current value of the intelligent electric tool in the working process; the controller is used for determining a first detection value and a second detection value according to the current value of the intelligent electric tool in operation; and controlling the motor to stop according to the first detection value and/or the second detection value so as to control the intelligent electric tool to stop. The problem of prior art exist can not satisfy auto-stop, work efficiency low under the multiple operating mode, realized stopping with control intelligent electric tool according to intelligent electric tool's first detected value and/or second detected value control motor stall, can adapt to the operating mode of multiple difference, improve work efficiency is solved.

The intelligent electric tool provided by the embodiment of the invention can execute the control method of the intelligent electric tool provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects for executing the method.

As a specific example of the intelligent electric tool, the intelligent electric tool may be a drill screwdriver, which includes a motor, a controller, a drill bit for fastening a screw, and a detection unit. On the basis of the embodiment, taking an electric drill screwdriver as an example, the specific working principle of the intelligent electric tool provided by the embodiment of the invention is as follows: for example, in the process of fastening a screw by an electric drill screwdriver, the current value output by a motor of the electric drill screwdriver is detected in real time through a detection unit, the current value detected in real time is fed back to a controller in real time, the controller calculates a first detection value and a second detection value of the current at the corresponding moment in real time according to the current value received in real time, then the calculated first detection value and the calculated second detection value at the corresponding moment are compared with preset conditions preset in software, and if the first detection value and/or the second detection value meet the preset conditions, namely that the screw is driven to the bottom by the electric drill screwdriver at the moment, the controller controls the motor to stop rotating, so that the electric drill screwdriver is controlled to stop. Therefore, whether the electric drill screwdriver is driven to the bottom or not can be judged by judging whether the first detection value and/or the second detection value of the electric drill screwdriver in the working process meet the preset condition or not through the controller. When the first detection value and/or the second detection value of the electric drill screwdriver in the working process meet the preset conditions, the fact that the electric drill screwdriver is driven to the bottom is indicated, the controller timely controls the motor to stop rotating at the moment, and therefore the situations that the screw is driven to the bottom by the electric drill screwdriver to cause slipping, the screw is loosened, the fastening efficiency is affected and the like are avoided. In addition, the judgment conditions of the first detection value and/or the second detection value of various different combinations can adapt to various different working conditions, and the fastening efficiency of the electric drill screwdriver is improved.

Fig. 3 is a flowchart of a method for calculating a first detection value of an intelligent electric tool according to an embodiment of the present invention, and referring to fig. 3, based on the foregoing technical solution, the method for calculating a first detection value according to an embodiment of the present invention includes:

step 310, calculating a difference value between a maximum current value and a minimum current value according to the maximum current value and the minimum current value of the current values of the intelligent electric tool sampled in a first preset time window;

specifically, the maximum current value and the minimum current value sampled in the time period are found according to the current value of the intelligent electric tool sampled in the first preset time window, and the difference value of the maximum current value and the minimum current value is calculated according to the sampled maximum current value and minimum current value. The first preset time window may be one fixed time interval, for example, 50 milliseconds, 100 milliseconds, 150 milliseconds, or may be a plurality of different fixed time intervals. It should be noted that specific values and setting types of the first preset time window may be set according to specific operating conditions, which are only exemplary and specific values are not specifically limited herein.

And step 320, multiplying the difference value between the maximum current value and the minimum current value by a preset multiple and then dividing the difference value by the minimum current value to obtain a first detection value.

The preset multiple may be a numerical value of 50, 100, 150, etc., and the specific preset multiple may be set according to a specific working condition, which is only an exemplary description herein, and the specific numerical value is not specifically limited herein.

The first detection value may be obtained by the following method: and sampling the current value of the intelligent electric tool in a second preset time window, wherein the sampling comprises the current value at the starting moment of the second preset time window and the current value at the ending moment of the second preset time window. And calculating the difference value between the current value at the end moment of the second preset time window and the current value at the start moment of the second preset time window according to the current value at the start moment of the second preset time window and the current value at the end moment of the second preset time window. In addition, the second preset time window may be one fixed time interval, for example, 30 ms, 100 ms, 160 ms, etc., or may be a plurality of different fixed time intervals. It should be noted that specific values and setting types of the second preset time window may be set according to specific operating conditions, which are only exemplary and specific values are not specifically limited herein.

Fig. 4 is a flowchart of a method for calculating a second detection value of an intelligent electric tool according to an embodiment of the present invention, where based on the foregoing technical solution, the method for calculating the second detection value according to the embodiment of the present invention includes:

and step 410, calculating a difference value between the current value of the current moment and the current value of the previous moment which are continuously adjacent according to the current value of the intelligent electric tool at each moment sampled in the third preset time window.

The third preset time window may be one fixed time interval, for example, 50 milliseconds, 100 milliseconds, 150 milliseconds, or may be a plurality of different fixed time intervals. It should be noted that specific values and setting types of the third preset time window may be set according to specific operating conditions, which are only exemplary and specific values are not specifically limited herein.

And step 420, dividing the difference value between the current value at the current moment and the current value at the previous moment by the current value at the previous moment to obtain a second detection value at the current moment.

Specifically, if the second detection value at the present time is smaller than zero, the second detection value at the previous time is taken as the second detection value at the present time.

Generally, in order to facilitate speed regulation of an operator, the intelligent electric tool is provided with a plurality of gears capable of speed regulation, such as metal gears, and the duty ratio of motor speed regulation can be adjusted by adjusting the trigger pressing angle of the metal gears, so that the running speed of the intelligent electric tool can be adjusted. The inventor researches and discovers that when the pressing angle of a trigger of a metal gear of the intelligent electric tool is within the range of 0-10%, the corresponding duty ratio is 0-30%, the duty ratio is increased according to a certain proportion, but the intelligent electric tool cannot trigger the automatic stop function. When the trigger pressing angle is within the range of 10% -100%, the corresponding duty ratio is increased and can be stabilized at 100%, and therefore the trigger stopping function of the intelligent electric tool can be activated when the trigger pressing angle is within the range of 10% -100%.

Optionally, before the intelligent power tool triggers shutdown, the method further comprises: if the first detection value continuously decreases more than two times within the first preset time, the first detection value after the second decrease is smaller than or equal to the first preset value, and the first detection value at the later sampling time is smaller than or equal to zero, the intelligent electric tool is successfully started.

The first preset time may be 11 milliseconds, 10 milliseconds, 9 milliseconds, etc., the first preset value may be-3, and the specific first preset time and the first preset value may be set according to a specific working condition, which is not specifically limited herein.

Optionally, the motor is controlled to stop according to the first detection value and/or the second detection value to control the intelligent electric tool to stop, and the following different working conditions may be specifically included:

the working condition I is as follows: after the peak value of the first detection value occurs, if the first detection value is larger than or equal to the second preset value after the sampling period of the M first detection values occurs, and the first detection value is continuously decreased twice after the first detection value is larger than or equal to the second preset value, the intelligent electric tool is triggered to stop.

Where M is a sampling period of the first detection value, and M may be a positive integer such as 11, 10, or 9. The value of M may be set according to the requirements of specific working conditions and sampling frequency, and the specific numerical value is not specifically limited herein. The second preset value may be-2, and the specific value may be set according to a specific working condition, which is not specifically limited herein.

Working conditions are as follows: after the peak value of the first detection value occurs, the first detection value is smaller than or equal to a third preset value after the sampling period of the M first detection values, and then the intelligent electric tool is triggered to stop.

Where M is a sampling period of the first detection value, and M may be a positive integer such as 11, 10, or 9. The value of M may be set according to the specific working condition and the requirement of the sampling frequency, the specific value is not specifically limited herein, and the third preset value is smaller than the second preset value. The third preset value may be-4, and the specific value may be set according to a specific working condition, which is not specifically limited herein.

Working conditions are as follows: and after the first detection value is larger than or equal to the fourth preset value after the sharp peak value of the first detection value and the steep peak value of the first detection value occur, triggering the intelligent electric tool to stop. The fourth preset value may be 11, and the specific value may be set according to a specific working condition, which is not specifically limited herein. Working conditions are as follows: and after the first detection value is smaller than or equal to a fifth preset value, the first detection value is continuously increased three times after the first detection value is smaller than or equal to the fifth preset value, and the first detection value which is increased last time is larger than or equal to zero, the intelligent electric tool is triggered to stop, wherein the fifth preset value is smaller than the fourth preset value. The fifth preset value may be-5, and the specific value may be set according to a specific working condition, which is not specifically limited herein.

Working condition five: and under the condition that the sharp peak value of the first detection value occurs and the steep peak value of the first detection value does not occur, the first detection value is larger than or equal to a fourth preset value, and the first detection value is larger than or equal to a sixth preset value after the first detection value is larger than or equal to the fourth preset value, the intelligent electric tool is triggered to stop. Wherein the sixth preset value is greater than the fourth preset value. The sixth preset value may be 18, and the specific value may be set according to a specific operating condition, which is not specifically limited herein.

Working condition six: after the occurrence of a sharp peak value of the first detection value and a steep peak value of the first detection value, the occurrence of the second detection value being greater than or equal to a seventh preset value, and during a sampling period of N first detection values after the occurrence of the second detection value being greater than or equal to the seventh preset value: if the first detection value is larger than or equal to the eighth preset value, triggering the intelligent electric tool to stop; and if the first detection value is not larger than or equal to the eighth preset value, resetting the timing and restarting the timing detection.

Where N is a sampling period of the first detection value, and N may be a positive integer such as 5, 6, or 7. The value of N can be set according to specific working conditions and the requirement of sampling frequency, and the eighth preset value is smaller than the seventh preset value. The seventh preset value may be 28, the eighth preset value may be 9, and specific values of the seventh preset value and the eighth preset value may be set according to specific operating conditions, which is not limited herein.

A seventh working condition: in the case where a sharp peak value of the first detection value occurs and a steep peak value of the first detection value does not occur, it occurs that a maximum value of the second detection value occurring in sampling periods of two consecutive second detection values is greater than or equal to a ninth preset value, a minimum value of the second detection value is greater than or equal to a tenth preset value, and in sampling periods of N first detection values after a maximum value of the second detection value occurring in sampling periods of two consecutive second detection values is greater than or equal to the ninth preset value 6: if the first detection value is larger than or equal to the eighth preset value, triggering the intelligent electric tool to stop; and if the first detection value is not larger than or equal to the eighth preset value, resetting the timing and restarting the timing detection.

Where N is a sampling period of the first detection value, and N may be a positive integer such as 5, 6, or 7. The value of N can be set according to the requirements of specific working conditions and sampling frequency, and the tenth preset value is smaller than the ninth preset value. The ninth preset value may be 26, the tenth preset value may be 20, and specific values of the ninth preset value and the tenth preset value may be set according to specific operating conditions, which is not specifically limited herein.

Working conditions are eight: and after the peak value of the first detection value occurs, the second detection value is larger than or equal to an eleventh preset value, and the intelligent electric tool is triggered to stop. The eleventh preset value may be 40, and the specific value may be set according to a specific working condition, which is not specifically limited herein.

Working condition nine: and in a sampling period of N first detection values after the peak value of the first detection value does not appear but the second detection value is greater than or equal to the eleventh preset value: if the first detection value is larger than or equal to the eighth preset value, triggering the intelligent electric tool to stop; and if the first detection value is not larger than or equal to the eighth preset value, resetting the timing and restarting the timing detection.

Where N is a sampling period of the first detection value, and N may be a positive integer such as 5, 6, or 7. The value of N may be set according to the requirements of specific working conditions and sampling frequency, and the specific numerical value is not specifically limited herein.

Ten working conditions: if the peak value of the first detection value does not appear but the maximum value of the second detection value appears in the sampling period of two consecutive second detection values, the maximum value of the second detection value is greater than or equal to a twelfth preset value, and the minimum value of the second detection value is greater than or equal to a tenth preset value, if the peak value of the first detection value does not appear but the maximum value of the second detection value appears in the sampling period of two consecutive second detection values, the minimum value of the second detection value is greater than or equal to the twelfth preset value, and the minimum value of the second detection value is greater than or equal to the sampling period of N first detection values after the tenth preset value: if the first detection value is larger than or equal to the eighth preset value, triggering the electric tool to stop; and if the first detection value is not larger than or equal to the eighth preset value, resetting the timing and restarting the timing detection.

Where N is a sampling period of the first detection value, and N may be a positive integer such as 5, 6, or 7. The value of N can be set according to the specific working condition and the requirement of sampling frequency, and the tenth preset value is smaller than the twelfth preset value. The twelfth preset value may be 30, and a specific value of the twelfth preset value may be set according to a specific working condition, which is not specifically limited herein.

It should be noted that the stop triggering determination conditions in the above ten conditions are independent from each other, and as long as the first detection value and/or the second detection value satisfies any one of the above ten operating conditions, the stop triggering determination conditions can be used as the basis for triggering the intelligent electric tool to stop.

On the basis of the above technical solution, the method for determining whether a peak value of the first detection value occurs may include:

within a second preset time after the intelligent electric tool is successfully started, if the first detection value is larger than or equal to a fifteenth preset value, and the first detection value continuously decreases twice after the first detection value is larger than or equal to the fifteenth preset value, and the first detection value is larger than or equal to zero after the first detection value decreases for the second time, it can be determined that a peak value of the first detection value occurs.

Wherein the fifteenth preset value is greater than zero. The second preset time may be 1 second, 1.2 seconds, etc., the fifteenth preset value may be 3, and the specific values of the second preset time and the fifteenth preset value may be set according to specific working conditions, which is not specifically limited herein.

On the basis of the above technical solution, the method for determining whether a steep peak of the first detection value occurs may include:

after the sharp peak value of the first detection value is judged to occur, if the first detection value is larger than or equal to a thirteenth preset value and the first detection value is smaller than or equal to a fourteenth preset value after the first detection value is larger than or equal to the thirteenth preset value, the sharp peak value of the first detection value can be judged to occur. And the fourteenth preset value is smaller than the thirteenth preset value. The thirteenth preset value may be 6, the fourteenth preset value may be-1, and the specific values of the thirteenth preset value and the fourteenth preset value may be set according to specific working conditions, which is not specifically limited herein.

Fig. 5 is a flowchart of a control method of an intelligent electric tool according to an embodiment of the present invention. Referring to fig. 5, the present embodiment may be applied to an implementation process of a control method of an intelligent power tool, where the method may be executed by the intelligent power tool, and may be specifically implemented by software and/or hardware in the intelligent power tool. The method specifically comprises the following steps:

step 510, acquiring a current value of the intelligent electric tool in working;

the intelligent electric tool comprises a motor, a controller, a detection unit and the like, and particularly, the current value of the intelligent electric tool in operation can be acquired through the detection unit, such as a current sampling circuit. The detection unit is respectively electrically connected with the motor and the controller, the detection unit can be a current sampling circuit, the current sampling circuit can comprise a current detection resistor, and the current value output by the intelligent electric tool can be acquired by collecting the current flowing through the current detection resistor. The current sampling circuit is used for acquiring the current value output by the motor in real time and feeding the current value acquired in real time back to the controller in real time. The current collected by the current sampling circuit can comprise the current of the intelligent electric tool at any time in the starting process, the working process, before the shutdown and the like.

And step 520, determining a first detection value and a second detection value according to the current value of the intelligent electric tool in operation.

For example, a controller in the intelligent electric tool obtains a current value of the intelligent electric tool in operation in real time through a current sampling circuit, and can calculate a first detection value and a second detection value at corresponding moments according to a current change value obtained in real time. The first detection value may be a current change rate, which may reflect a change rate of a current value of the intelligent electric tool with respect to time. The second detection value can be a current trend value which can reflect the trend of the current value change of the intelligent electric tool.

And 530, if the first detection value and/or the second detection value meet a preset condition, triggering the intelligent electric tool to stop.

Specifically, the preset condition may be set according to different operating conditions of the intelligent electric tool, for example, when only the first detection value satisfies the first preset first detection value threshold, the intelligent electric tool may trigger the shutdown, when only the second detection value satisfies the first preset second detection value threshold, the intelligent electric tool may trigger the shutdown, when both the first detection value and the second detection value satisfy the respective preset thresholds, the intelligent electric tool may trigger the shutdown, when the first detection value satisfies the preset threshold and the second detection value does not satisfy the preset threshold, the intelligent electric tool may trigger the shutdown, and when the second detection value satisfies the preset threshold and the first detection value does not satisfy the preset threshold, the intelligent electric tool may trigger the shutdown. It should be noted that what kind of preset condition is specifically met by the first detection value and/or the second detection value may be set according to a specific working condition, which is only an exemplary description here, and which kind of conditions are specifically included herein without specific limitations.

In the technical scheme of the embodiment, the working principle of the control method of the intelligent electric tool is as follows: in the working process of the intelligent electric tool, the current value output by the intelligent electric tool is detected and obtained in real time, the first detection value and the second detection value of the current at the corresponding moment are calculated in real time according to the current value obtained in real time, then the calculated first detection value and the calculated second detection value at the corresponding moment are compared with preset conditions preset in software, and if the first detection value and/or the second detection value meet the preset conditions, the intelligent electric tool is triggered to stop. Therefore, whether the intelligent electric tool is triggered to stop or not can be determined by judging whether the first detection value and/or the second detection value meet the preset condition or not. Wherein, first detected value and/or second detected value have the judgement condition of multiple combination form, therefore can satisfy the judgement condition of the electric tool's of multiple different operating modes trigger shut down, improved intelligent electric tool automatic control's efficiency.

According to the technical scheme provided by the embodiment of the invention, the current value of the intelligent electric tool in the working process is obtained; determining a first detection value and a second detection value according to the current value of the intelligent electric tool in operation; and if the first detection value and/or the second detection value meet the preset condition, triggering the intelligent electric tool to stop. The problem of prior art exist can not satisfy auto-stop, work efficiency low under the multiple operating mode, realize triggering when the first detected value of intelligent electric tool and/or second detected value satisfy the preset condition and shut down, can adapt to the operating mode of multiple difference, improve work efficiency is solved.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.