A control method for power-on judgment, a power tool and a computer-readable medium

Abstract

The present invention discloses a control method for power-on judgment, a power tool and a computer-readable medium. By detecting the switch signal of the trigger switch and the voltage of the controller, and judging whether both meet the judgment conditions, it is thus judged whether the trigger switch is successfully powered on, solving the problem that when due to low temperature or long-term operation of the trigger switch, its mechanical structure is worn, resulting in the trigger switch being released but the tool can still work. The accuracy of sampling is improved, making the detection of the trigger switch closing more accurate and making the user safer during use.

Description

[Technical Field]

[0001] The present invention relates to the field of power tools, and more specifically, to a control method for power-on judgment, a power tool, and a computer-readable medium. [Background Art]

[0002] With the continuous increase in the daily demand for power tools, the use accuracy of power tools has gradually attracted attention. During use, it is inevitable that after the trigger switch is pressed / released, due to the power tool being in low temperature or the signal trigger switch being operated for a long time, the mechanical structure of the trigger switch wears out, resulting in the trigger switch being released / closed. The operator cannot judge whether the power-on is successful / stop power-on based on the operation of the trigger switch, and the whole machine cannot be successfully started / closed.

[0003] Please refer to Chinese Patent No. CN101391416B, which was published on July 6, 2011. It discloses a power tool. The operator operates a trigger switch, and the main contact in the trigger switch is composed of an ON / OFF trigger switch, etc. When the operator presses the operation part and the stroke reaches a certain preset value, the main contact changes from the OFF state to the ON state and the voltage of the signal becomes low level, then the power tool starts. The stroke detection part measures the trigger switch signal to adjust the voltage applied to the motor. Although the tool can be controlled according to the on / off state of the main contact, it is still not intelligent enough and cannot give the operator an accurate result.

[0004] In view of this, it is necessary to design a control method for power-on judgment and a power tool to overcome the defects of the prior art. [Summary of the Invention]

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an improved solution to solve the problem that when the signal trigger switch of the tool is closed, the tool can be ready to judge whether the power-on is successful.

[0006] The present invention can adopt the following technical solutions to solve the problems of the prior art:

[0007] A power tool, including a trigger switch, a battery pack, a controller, and a motor, characterized in that: the battery pack is connected to the controller to provide electrical energy to the controller; the motor is connected to the controller, and the controller controls the operation of the motor;

[0008] The controller: is used to obtain the voltage of the controller and the control signal of the trigger switch; control the operation of the power tool according to the voltage of the controller and the control signal; when the voltage of the controller is at a low level and the signal level value of the trigger switch is greater than the minimum set value, the controller controls the operation of the whole machine; wherein, the minimum value of the signal level value of the trigger switch is stored in the controller.

[0009] A further improvement solution is: the power tool further includes an auxiliary power supply circuit, and the auxiliary power supply circuit includes: a power supply module, a collection module, a power-on self-locking module, and a power-on module;

[0010] The power supply module is used to supply power to the controller; the collection module is used to collect the voltage of the battery pack; the power-on self-locking module is used to control the continuous operation of the power tool after detecting that the trigger switch is released; the power-on module is used to power on the system after the trigger switch is closed.

[0011] A further improvement solution is: the trigger switch includes 8 pins. When the trigger switch is closed, the 4th pin and the 5th pin inside the trigger switch are short-circuited and connected. Among them, the 4th pin is connected to the controller through the power-on module of the auxiliary power supply circuit of the power tool, and the 5th pin is grounded; the 6th pin of the trigger switch outputs the trigger switch signal and is connected to the controller. After the controller detects the trigger switch signal, it controls the operation of the power tool according to the detected trigger switch signal.

[0012] A further improvement solution is: the controller is connected to the power-on module of the auxiliary power supply circuit, and the auxiliary power supply circuit provides voltage to the controller.

[0013] The present invention also provides a power tool, and the power tool includes:

[0014] A trigger module: used to control the operation of the power tool;

[0015] A processing module: used to obtain the voltage of the controller and the control signal of the trigger switch; control the operation of the power tool according to the voltage of the controller and the control signal; when the voltage of the controller is at a low level and the trigger switch signal level value is greater than the minimum set value, the controller controls the whole machine to operate; wherein, the minimum set value of the trigger switch signal level value is stored in the controller;

[0016] An auxiliary power supply module: connected to the processing module and the trigger module, used to supply power to the processing module to make the power tool work.

[0017] The present invention also provides a control method for power-on judgment, and the method includes:

[0018] S1: The controller pre-stores the minimum set value of the trigger switch signal;

[0019] S2: Close the trigger switch;

[0020] S3: Detect the voltage of the controller;

[0021] S4: Determine whether the voltage of the controller is at a high level. If it is at a high level, the motor stops; otherwise, proceed to step S5.

[0022] S5: Detect the trigger switch signal of the trigger switch.

[0023] S6: Determine whether the trigger switch signal is greater than the minimum set value. If not, the motor stops; otherwise, the whole machine operates.

[0024] A further improvement is that the minimum value of the pre - stored trigger switch signal is 200.

[0025] A further improvement is that the controller is connected to the SWITCH - OFF endpoint of the power - on module of the auxiliary power supply circuit, and the auxiliary power supply circuit provides voltage to the controller. The voltage at the SWITCH - OFF endpoint is detected, where the voltage at the SWITCH - OFF endpoint is the voltage of the controller; when the trigger switch is closed, the voltage at the SWITCH - OFF endpoint is at a low level, otherwise, it is at a high level.

[0026] The present invention also provides a power tool, including a memory and a processor. A computer program that can run on the processor is stored on the memory. When the processor executes the computer program, the method described above is implemented.

[0027] The present invention also provides a computer - readable medium, which has non - volatile program code executable by a processor, and the program code enables the processor to execute the method described above.

[0028] Compared with the prior art, the present invention has the following beneficial effects: A control method for power - on judgment of a trigger switch signal and a power tool provided by the present invention determine whether the trigger switch is closed by detecting whether the voltage at the power - on point of the controller and the trigger switch signal output by the trigger switch simultaneously meet the preset values; it solves the problem that when due to low temperature or long - term operation of the trigger switch, its mechanical structure wears, resulting in the trigger switch being released but the tool can still work, improves the accuracy of signal detection, makes the detection of the trigger switch closure more accurate, makes the user safer during use, and improves the user's trust. [Description of the Drawings]

[0029] The following further describes in detail the specific embodiments of the present invention with reference to the drawings:

[0030] Figure 1 is the principle flow chart of a preferred embodiment of the present invention;

[0031] Figure 2-a is the circuit diagram of the auxiliary power supply module of a preferred embodiment of the present invention;

[0032] Figure 2-b is the circuit diagram of the trigger module in the preferred embodiment of the present invention;

[0033] Figure 2-c is the circuit diagram of the processing module in the preferred embodiment of the present invention; [Specific Embodiments]

[0034] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0035] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0036] The control method for power-on judgment described in the present invention is applicable to intelligent devices such as power tools / electric devices, and as long as the above devices / tools can adopt the substantial content of the technical solutions disclosed below, they will fall within the protection scope of the present invention.

[0037] Due to the influence of low temperature or long-term operation, the mechanical structure of the signal trigger switch is worn. Generally, it is generally considered that pressing the trigger switch means that the power tool is successfully powered on. Such a method for power-on judgment of the trigger switch cannot enable the operator to accurately know whether the trigger switch is closed / open. In view of the deficiencies of the prior art, the purpose of the present invention is to provide an improved solution that can provide a safer operation and protect the operator from harm.

[0038] The present invention can solve the problems of the prior art by adopting the following technical solutions: A control method for power-on judgment, which is applied to a power tool started by a trigger switch. The power tool includes a trigger module, a processing module, and an auxiliary power supply module; the trigger module includes a trigger switch; the processing module includes a controller for storing the minimum value of the trigger switch signal level and controlling the normal operation of the power tool; the auxiliary power supply module includes a power supply module, a collection module, a power-on self-locking module, and a power-on module; the power supply module is electrically connected to the collection module, the power-on self-locking module, and the power-on module, and the power-on self-locking module is electrically connected to the power-on module; the power tool further includes a motor.

[0039] The method includes:

[0040] S1: The controller pre-stores the minimum set value of the trigger switch signal;

[0041] S2: Close the trigger switch;

[0042] S3: Detect the voltage of the controller;

[0043] S4: Judge whether the voltage of the controller is a high level. If it is a high level, the motor stops. Otherwise, go to step S5;

[0044] S5: Detect the trigger switch signal of the trigger switch;

[0045] S6: Determine whether the trigger switch signal is greater than the minimum set value. If not, stop the motor. Otherwise, the whole machine runs.

[0046] The pre-stored minimum value of the trigger switch signal is 200. The trigger switch signal is converted into an AD value through an analog-to-digital converter ADC. In this technical solution, the peripheral precision of the analog-to-digital converter ADC in the controller is 12 bits. At this time, the maximum value of the AD value is 4096;

[0047] The controller is connected to the SWITCH-OFF end point of the power-on module of the auxiliary power supply circuit, and the auxiliary power supply circuit provides voltage for the controller, and the voltage of the SWITCH-OFF end point is detected. At this time, the voltage at the SWITCH-OFF end point is the voltage of the controller. When the trigger switch is closed, the voltage at the SWITCH-OFF end point is low level. Otherwise, it is high level.

[0048] Compared with the prior art, the present invention provides a control method for judging the power-on of a signal trigger switch. By obtaining the voltage of the controller and the trigger switch signal of the trigger switch, it is judged whether both are within the preset range, so as to achieve the effect of controlling the power-on of the trigger switch signal. The above technical solution not only judges whether the power tool is powered on only from the state of the trigger switch being closed or open, but also judges whether the voltage of the controller meets the power-on success condition. Only when both conditions are met is the power-on successful. Through the above technical solution, the operator's safety requirements are met, the problem that the tool can still work when the trigger switch is loosened due to mechanical wear after long-term operation at low temperature or of the trigger switch is solved, the accuracy of tool signal detection is improved, and the risk of damaging the operator's interests and personal safety is avoided, enhancing the customer's excellent experience.

[0049] The present invention also provides a power tool, which implements the above-described solution through the power tool; the power tool includes:

[0050] Trigger module: used to control the operation of the power tool;

[0051] Processing module: used to obtain the voltage of the controller and the control signal of the trigger switch; control the operation of the power tool according to the voltage of the controller and the control signal; when the voltage of the controller is low level and the trigger switch signal level value is greater than the minimum set value, the controller controls the whole machine to run; wherein, the minimum set value of the trigger switch signal level value is stored in the controller;

[0052] Auxiliary power supply module: Connected to the processing module and the trigger module, it is used to supply power to the processing module to make the power tool work.

[0053] In an alternative solution, the present invention also provides a power tool, including a trigger switch, a battery pack, a controller, and a motor. The battery pack is connected to the controller to supply electrical energy to the controller; the motor is connected to the controller, and the controller controls the operation of the motor.

[0054] The solution described in the embodiment is implemented through the power tool, and the power tool includes:

[0055] Controller: Used to obtain the voltage of the controller and the control signal of the trigger switch; control the operation of the power tool according to the voltage of the controller and the control signal; when the voltage of the controller is at a low level and the signal level value of the trigger switch is greater than the minimum set value, the controller controls the operation of the whole machine; wherein, the minimum value of the signal level value of the trigger switch is stored in the controller.

[0056] The power tool further includes an auxiliary power supply circuit, and the auxiliary power supply circuit includes: a power supply module, a collection module, a power-on self-locking module, and a power-on module;

[0057] The power supply module is used to supply power to the controller; the collection module is used to collect the voltage of the battery pack; the power-on self-locking module is used to control the continuous operation of the power tool after detecting that the trigger switch is released; the power-on module is used to power on the system after the trigger switch is closed.

[0058] The trigger switch includes 8 pins. When the trigger switch is closed, the 4th pin and the 5th pin inside the trigger switch are short-circuited and connected. Among them, the 4th pin is connected to the controller through the power-on module of the auxiliary power supply circuit of the power tool, and the 5th pin is grounded; the 6th pin of the trigger switch outputs the trigger switch signal and is connected to the controller. After the controller detects the trigger switch signal, it controls the operation of the power tool according to the detected trigger switch signal.

[0059] The controller is connected to the power-on module of the auxiliary power supply circuit and provides voltage to the controller through the auxiliary power supply circuit.

[0060] Figure 2-aIt is an auxiliary power supply module, including: a power supply module composed of the positive pole B+ of the battery pack, R2, Q1, D1, R9, ZD2, C2 and C3, which is used to supply power to the controller; a collection module composed of R7, R8 and C1, which is used to collect the voltage of the battery pack; a power-on self-locking module composed of D4, R3, R6 and Q2, which is used to control the continuous operation of the power tool after detecting that the trigger switch is released; and a power-on module composed of ZD1, D2, D3, R10, which is used to power on the system after the trigger switch is closed. The power supply module is electrically connected to the power-on self-locking module, the collection module and the power-on module; the power-on self-locking module is electrically connected to the power-on module.

[0061] Figure 2-b It is a trigger module, including a trigger switch, which has 8 pins. The ON / OFF endpoint of the 4th pin is electrically connected to the power-on module of the auxiliary power supply module; the 5th pin is grounded; when the trigger switch is closed, the 4th pin is short-circuited with the 5th pin; at the 6th pin, a branch of R14, C17, R15 is constructed to convert the travel of the trigger switch into a level signal, where the AD_VR endpoint of the 6th pin is pulled up and biased, that is, the potential of the AD_VR endpoint of the 6th pin is offset from the zero potential point to a predetermined positive potential. As the pressing depth of the trigger switch increases, the potential of the AD_VR endpoint changes, so the trigger switch signal value of the trigger switch also changes. The ON / OFF endpoint of the 4th pin is composed of the positive pole B+ of the battery pack, R2, R5, ZD1, D2, D3, R10 of the auxiliary power supply circuit. When the signal trigger switch is closed, the 4th pin is short-circuited and connected to the 5th pin, and the 5th pin is grounded. At this time, the ON / OFF endpoint is also grounded, and the current flows through the positive pole B+ of the battery pack, through R2, R5, ZD1, D2 to the ground. When the above branch is turned on, the auxiliary power supply is powered on, and the controller is successfully powered on.

[0062] Figure 2-c It is a processing module. Preferably, the processing module is a controller. The processing module is connected to the motor and controls the operation of the motor. The processing module is used to obtain the voltage of the controller and the control signal of the trigger switch; the processing module controls the operation of the power tool according to the obtained voltage of the controller and the control signal; when the voltage of the controller is at a low level and the trigger switch signal level value is greater than the minimum set value, the controller controls the whole machine to operate; wherein, the minimum set value of the trigger switch signal level value is stored in the controller. The power-on module of the auxiliary power supply module is electrically connected to the controller of the processing module, and the controller receives the power-on signal; the trigger module is electrically connected to the controller, and the controller receives the trigger switch signal.

[0063] The present invention also provides a computer-readable medium, which has non-volatile program codes executable by a processor, and the program codes enable the processor to execute the method described in Embodiment 1.

[0064] Compared with the prior art, the power tool provided by the present invention determines whether both the voltage of the controller and the trigger switch signal of the trigger switch are within a preset range, so as to achieve the effect of controlling the power-on of the trigger switch signal. Through the above technical solution, the safety requirements of the operator are met, and the problem that the tool can still work after the trigger switch is loosened due to mechanical wear after long-term operation at low temperature or of the trigger switch is solved, and the risk of damaging the interests and personal safety of the operator is also avoided, improving the high-quality experience of customers.

[0065] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a tool, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0066] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (tools), and computer program products according to the embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for realizing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0067] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device realizes the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0068] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide for realizing the functions in Figure 1 one process or multiple processes and / or blocksFigure 1 Steps of functions specified in one or more boxes.

[0069] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting it. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions described in the foregoing embodiments or easily conceive of changes, or perform equivalent replacements for some of the technical features; and these modifications, changes or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An electric tool, comprising a trigger switch, a battery pack, a controller and a motor, characterized in that: The battery pack is connected to the controller and supplies electrical energy to the controller; the motor is connected to the controller, and the controller controls the operation of the motor; The controller: is used to obtain the voltage of the controller and the control signal of the trigger switch; control the operation of the power tool according to the voltage of the controller and the control signal; when the voltage of the controller is at a low level and the signal level value of the trigger switch is greater than the minimum set value, the controller controls the operation of the whole machine; wherein, the minimum set value of the signal level value of the trigger switch is stored in the controller.

2. The electric tool according to claim 1, characterized in that: The power tool further includes an auxiliary power supply circuit, and the auxiliary power supply circuit includes: a power supply module, a collection module, a power-on self-locking module, and a power-on module; The power supply module is used to supply power to the controller; the collection module is used to collect the voltage of the battery pack; the power-on self-locking module is used to control the continuous operation of the power tool after detecting that the trigger switch is released; the power-on module is used to power on the system after the trigger switch is closed.

3. The electric tool according to claim 2, characterized in that: The trigger switch includes 8 pins. When the trigger switch is closed, the 4th pin and the 5th pin inside the trigger switch are short-circuited and connected. Among them, the 4th pin is connected to the controller through the power-on module of the auxiliary power supply circuit of the power tool, and the 5th pin is grounded; the 6th pin of the trigger switch outputs the trigger switch signal and is connected to the controller. After the controller detects the trigger switch signal, it controls the operation of the power tool according to the detected trigger switch signal.

4. The electric tool according to claim 2, characterized in that The controller is connected to the power-on module of the auxiliary power supply circuit and supplies voltage to the controller through the auxiliary power supply circuit.

5. An electric tool, characterized in that The power tool includes: A trigger module: used to control the operation of the power tool; A processing module: used to obtain the voltage of the controller and the control signal of the trigger switch; control the operation of the power tool according to the voltage of the controller and the control signal; when the voltage of the controller is at a low level and the signal level value of the trigger switch is greater than the minimum set value, the controller controls the operation of the whole machine; wherein, the minimum set value of the signal level value of the trigger switch is stored in the controller; An auxiliary power supply module: connected to the processing module and the trigger module, used to supply power to the processing module to make the power tool work.

6. A control method for power-on judgment, characterized in that The method includes: S1: The controller pre-stores the minimum set value of the trigger switch signal; S2: Close the trigger switch; S3: Detect the voltage of the controller; S4: Judge whether the voltage of the controller is at a high level. If it is at a high level, the motor stops running. Otherwise, go to step S5; S5: Detect the trigger switch signal of the trigger switch; S6: Judge whether the trigger switch signal is greater than the minimum set value. If not, the motor stops running. Otherwise, the whole machine runs.

7. The control method for power-on judgment according to claim 6, characterized in that: The pre-stored minimum set value of the trigger switch signal is 200.

8. The control method for power-on judgment according to claim 6, characterized in that: The controller is connected to the SWITCH-OFF endpoint of the power-on module of the auxiliary power supply circuit, and provides voltage to the controller through the auxiliary power supply circuit, and detects the voltage of the SWITCH-OFF endpoint, wherein the voltage at the SWITCH-OFF endpoint is the voltage of the controller; when the trigger switch is closed, the voltage at the SWITCH-OFF endpoint is at a low level, and vice versa, it is at a high level.

9. An electric tool, comprising a memory and a processor, wherein a computer program that can run on the processor is stored on the memory, characterized in that: When the processor executes the computer program, it implements the method described in any one of claims 6-8 above.

10. A computer-readable medium having non-volatile program code executable by a processor, characterized in that: The program code causes the processor to execute the method described in any one of claims 6-8.

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