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 level signal of the trigger switch and the voltage of the battery pack, and judging whether both are greater than the corresponding preset values, 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, improving the accuracy of sampling, making the detection of the trigger switch closing more accurate, and making the user safer during the use process.

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. [Background Art]

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

[0003] Please refer to Chinese Patent No. CN210577798U, which was published on May 19, 2020. It discloses a power-on protection circuit and a power tool. The power-on protection circuit includes a power-on detection circuit for detecting the power-on voltage of the connected power supply, and a switch detection circuit for outputting a level signal according to the switch state of the start switch. When the start switch is closed, the switch detection circuit outputs a first level. When the power tool presses the switch and then inserts the battery pack, the whole machine cannot be started within a short time. Although the tool can be controlled according to the on / off state of the switch, 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 of the signal switch 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 switch of the tool is pressed, the tool can accurately 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, which includes: a trigger switch for controlling the operation of the power tool; a battery pack for supplying power to the power tool; the power tool further includes:

[0008] MCU: used to store the first set value of the battery pack voltage and the second set value of the switch level signal. When the battery pack voltage is greater than the first set value and the switch level signal is greater than the second set value, it controls the power tool to start working;

[0009] An auxiliary power supply circuit: connected to the battery pack, the trigger switch, and the MCU, used to supply power to the MCU to enable the power tool to work normally.

[0010] A further improvement solution is as follows: The trigger switch includes 8 pins. When the trigger switch is pressed, 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 battery pack, and the 5th pin is connected to the ON / OFF end point of the auxiliary power supply circuit.

[0011] A further improvement solution is as follows: The 6th pin of the trigger switch outputs the switch level signal and is connected to the MCU. After the MCU detects the switch level signal, it controls the operation of the power tool according to the detected switch level signal.

[0012] A further improvement solution is as follows: The auxiliary power supply circuit includes an AD_V end point. The MCU is connected to the AD_V end point of the auxiliary power supply circuit and is supplied with voltage by the auxiliary power supply circuit.

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

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

[0015] Processing module: used to store the first set value of the battery pack voltage and the minimum second set value of the switch level signal, and control the working state of the power tool according to the first set value and the second set value;

[0016] Auxiliary power supply module: connected to the processing module and the trigger module, used to supply power to the processing module so that the power tool can work normally.

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

[0018] S1: The first set value of the battery pack voltage and the minimum second set value of the switch level signal are pre-stored in the MCU;

[0019] S2: Close the trigger switch;

[0020] S3: Detect the voltage of the battery pack;

[0021] S4: Judge whether the voltage of the battery pack is greater than the first set value. If not, the motor stops. Otherwise, go to step S5;

[0022] S5: Detect the switch level signal of the trigger switch;

[0023] S6: Judge whether the switch level signal is greater than the second set value. If not, the motor stops. Otherwise, control the power tool to start working.

[0024] A further improvement scheme is as follows: the second set value of the pre-stored switch level signal is 200, and the first set value of the battery pack voltage is 2V.

[0025] A further improvement scheme is as follows: the MCU is connected to the AD_V terminal of the auxiliary power supply circuit, and the auxiliary power supply circuit provides voltage for the MCU. The MCU detects the voltage of the AD_V terminal, compares the voltage of the AD_V terminal with the first set value, and determines whether the trigger switch is closed according to the comparison result.

[0026] The present invention also provides an electric 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. The program code causes the processor to execute the method.

[0028] Compared with the prior art, the present invention has the following beneficial effects: a control method and an electric tool for power-on judgment of a switch signal provided by the present invention determine whether the signal switch is closed by detecting whether the voltage of the battery pack and the switch signal level value output by the signal switch simultaneously meet the preset values; it solves the problem that when due to low temperature or mechanical structure wear after long-term operation of the switch, the switch is released and the tool can still work, making the detection of the switch closure more accurate, improving the accuracy of signal detection, making the user safer during use, and improving 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 2-1 is the circuit diagram of the auxiliary power supply module of a preferred embodiment of the present invention;

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

[0033] Figure 2-3 is the circuit diagram of the processing module of a preferred embodiment of the present invention; [Specific Embodiments]

[0034] The following further describes the present invention in detail with reference to the drawings and embodiments.

[0035] The terms used in the present invention are for the purpose of describing specific embodiments only 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 switch is worn. Generally, it is generally considered that pressing the signal switch means that the power tool is successfully powered on. Such a power-on judgment method cannot allow the operator to accurately know whether the 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, the method is applied to a power tool started by a trigger switch, and the power tool includes a trigger module, a processing module, and an auxiliary power module; the trigger module includes a switch; the processing module includes a controller for storing the minimum values of the battery pack voltage and the switch level signal and controlling the normal operation of the power tool; the auxiliary power module includes a power module, a collection module, and a power-on self-locking module; the power module is electrically connected to the collection module and the power-on self-locking module, and the power-on self-locking module and the collection module are electrically connected; the power tool also includes a motor.

[0039] The method includes:

[0040] S1: The MCU pre-stores a first set value of the battery pack voltage and a minimum second set value of the switch level signal; the MCU has an independent storage module, and the first set value of the battery pack voltage is stored through the storage module; preferably, the tool can also include a human-machine interaction module, and the first and second set values are set through the human-machine interaction module and then stored;

[0041] S2: Close the trigger switch; the tool has an operable trigger switch. Generally, the user controls the tool through the trigger switch. However, if the tool is controlled only based on the trigger switch, when the trigger is released, but due to the wear of the mechanical structure of the trigger switch, the tool can still work, which will endanger the user's safety in use;

[0042] S3: Detect the voltage of the battery pack; specifically, the voltage of the battery pack is detected through the detection module of the auxiliary power module;

[0043] S4: Judge whether the voltage of the battery pack is greater than the first set value. If not, the motor stops, otherwise, go to step S5;

[0044] S5: Detect the switch level signal of the trigger switch; specifically, the MCU is used to detect the switch level signal.

[0045] S6: Determine whether the switch level signal is greater than the second set value. If not, stop the motor. Otherwise, control the power tool to start working.

[0046] By detecting the battery pack voltage and the switch level signal, it is possible to prevent problems such as the tool being unable to start normally due to mechanical structure wear during startup, or the tool not stopping immediately after releasing the trigger switch after use. This effectively improves the accuracy of switch signal detection and enhances the user experience.

[0047] The switch level signal is the travel signal after the trigger switch is pressed. The second set value of the pre-stored switch level signal is 200. Among them, the switch signal is converted into an AD value through the 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, and the first set value of the pre-stored battery pack voltage is 2V.

[0048] The MCU is connected to the AD_V terminal of the auxiliary power supply circuit, and the auxiliary power supply circuit provides voltage for the MCU. The MCU detects the voltage of the AD_V terminal and compares the voltage of the AD_V terminal with the first set value of the pre-stored battery pack voltage to determine whether the trigger switch is closed.

[0049] Compared with the prior art, the present invention provides a control method for power-on judgment. By obtaining the voltage of the battery pack and the switch level signal of the trigger switch, it is determined whether they are both within the preset range, so as to achieve the effect of controlling the power-on of the 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 switch is released due to mechanical structure wear at low temperature or after long-term operation of the switch is solved. The accuracy of signal detection is improved, and the risk of damaging the interests and personal safety of the operator is avoided, enhancing the high-quality experience of customers.

[0050] The present invention also provides a power tool, which implements the above-described solution through the power tool; the power tool includes:

[0051] Trigger module: used to control the operation of the power tool.

[0052] Processing module: used to store the first set value of the battery pack voltage and the minimum second set value of the switch level signal, and control the working state of the power tool according to the first set value and the second set value.

[0053] Auxiliary power supply module: Connected to the processing module and the trigger module, it is used to supply power to the processing module so that the power tool can work normally.

[0054] Each module can be set independently or can be combined into one or more modules.

[0055] By detecting and judging the battery pack voltage and the switch level signal, it can effectively prevent the tool from failing to start normally due to wear of the mechanical structure of the trigger switch during startup, or prevent the problem that the tool cannot stop immediately after the user finishes using it and releases the trigger switch. This effectively improves the accuracy of switch signal detection and enhances the user experience.

[0056] In an alternative solution, the present invention also provides a power tool, and the solution described in the embodiment is implemented through the power tool. The power tool includes:

[0057] Trigger switch: Used for the user to control the operation of the power tool;

[0058] Battery pack: Used to supply power to the power tool;

[0059] MCU: Used to store the first set value of the battery pack voltage and the second set value of the switch level signal. When the battery pack voltage is greater than the first set value and the switch level signal is greater than the second set value, it controls the power tool to start working;

[0060] Auxiliary power supply circuit: Connected to the battery pack, the trigger switch and the MCU, it is used to supply power to the MCU so that the power tool works normally.

[0061] By detecting the battery pack voltage and the switch level signal, it can prevent the tool from failing to start normally due to wear of the mechanical structure of the trigger switch during startup, or prevent the problem that the tool cannot stop immediately after the user finishes using it and releases the trigger switch. This effectively improves the accuracy of switch signal detection and enhances the user experience.

[0062] The auxiliary power supply circuit includes: a power supply module for supplying power to the controller; a collection module for collecting the battery pack voltage; and a power-on self-locking module for the power tool to continue running after the switch is released. The power supply module is electrically connected to the collection module and the power-on self-locking module, and the power-on self-locking module is electrically connected to the collection module.

[0063] The trigger switch includes 8 pins. When the trigger switch is pressed, 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 positive electrode B+ of the battery pack, and the 5th pin is connected to the ON / OFF end point of the auxiliary power supply circuit.

[0064] The 6 pins of the trigger switch output the switch level signal and are connected to the MCU. After the MCU detects the switch level signal, it controls the operation of the power tool according to the detected switch level signal.

[0065] The auxiliary power supply circuit includes an AD_V end point. The MCU is connected to the AD_V end point of the auxiliary power supply circuit and supplies voltage to the MCU through the auxiliary power supply circuit.

[0066] Figure 2-1 A bit auxiliary power supply module, including: a power supply module composed of the battery pack positive electrode B+, D1, R1, R2, R3, Q1, Q2, ZD1, C1, C2, C3 and U1 for supplying power to the controller; a collection module composed of R6, R7 and C4 for collecting the battery pack voltage; and a power-on self-locking module composed of D2, D3, R4 and Q3 for controlling the continuous operation of the power tool after detecting that the trigger switch is released. The power supply module is electrically connected to the power-on self-locking module and the collection module.

[0067] Figure 2-2 A bit trigger module, including a trigger switch. There are 8 pins in the trigger switch. The 4th pin is electrically connected to the battery pack positive electrode B+ of the auxiliary power supply module; the 5th pin ON / OFF end point accesses R6, R7 and C4 to introduce power-on; when the trigger switch is closed, the 4th pin is shorted to the 5th pin. At this time, the ON / OFF end point of the 5th pin is directly connected to the battery pack positive electrode B+; a branch of R13, C20, R14 is constructed at the 6th pin to convert the travel amount of the trigger switch into a switch level signal, where the VR end point of the 6th pin is pulled up and biased, that is, the potential of the VR end point 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 VR end point changes, and thus the value of the switch level signal of the signal trigger switch also changes.

[0068] Figure 2-3 A bit processing module. Preferably, the processing module is an MCU. The MCU is connected to the motor and controls the operation of the motor. The processing module is used to obtain the voltage of the battery pack and the control signal of the switch; control the operation of the power tool according to the voltage of the battery pack and the control signal of the switch; when the voltage of the battery pack is greater than the first set value and the switch signal level value of the trigger switch is greater than the second set value, the processing module controls the power tool to work normally; where the first set value of the battery pack voltage and the second set value of the switch signal level value of the trigger switch are stored in the processing module.

[0069] The present invention also provides a computer-readable medium having non-volatile program code executable by a processor, and the program code causes the processor to execute the method described in the embodiment.

[0070] Compared with the prior art, for the power tool provided by the present invention, by obtaining the voltage of the MCU and the switch level signal of the trigger switch, it is judged whether both are within a preset range, so as to achieve the effect of controlling the power-on of the switch signal. Through the above technical solution, the safety requirements of the operator are met, the problem that the tool can still work after the switch is released due to mechanical structure wear at low temperature or after long-term operation of the switch is solved, and the risk of damaging the interests and personal safety of the operator is avoided, improving the excellent experience of customers.

[0071] Those skilled in the art should understand that the embodiments of the present invention can be provided as methods, tools, or computer program products. Therefore, the present invention can be implemented in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can be implemented in 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.

[0072] The present invention is described with reference to the flowcharts and / or block diagrams of methods, devices (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, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented 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 means for implementing the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0073] 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 instruction means, and the instruction means implements the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0074] 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 means for implementing the specified functions in Figure 1 one process or multiple processes and / or blocksFigure 1 Steps of functions specified in one or more boxes.

[0075] Finally, it should be noted that the above-described embodiments are only specific implementation manners 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 can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions 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, the electric tool comprising: A trigger switch for controlling the operation of a power tool; A battery pack for supplying power to the power tool; characterized in that the power tool further comprises: An MCU: for storing a first set value of the battery pack voltage and a second set value of the switch level signal, and controlling the power tool to start working when the battery pack voltage is greater than the first set value and the switch level signal is greater than the second set value; An auxiliary power supply circuit: connected to the battery pack, the trigger switch and the MCU, for supplying power to the MCU to enable the power tool to work properly.

2. The power tool according to claim 1, 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 battery pack, and the 5th pin is connected to the auxiliary power supply circuit.

3. The electric tool according to claim 1 or 2, characterized in that: The 6th pin of the trigger switch outputs the switch level signal and is connected to the MCU. After the MCU detects the switch level signal, it controls the operation of the power tool according to the detected switch level signal.

4. The electric tool according to claim 1, wherein The auxiliary power supply circuit includes an AD_V terminal. The MCU is connected to the AD_V terminal of the auxiliary power supply circuit and supplies voltage to the MCU through the auxiliary power supply circuit.

5. An electric tool, characterized in that, The power tool includes: A trigger module: for controlling the operation of the power tool; A processing module: for storing a first set value of the battery pack voltage and a second set value of the switch level signal, and controlling the working state of the power tool according to the first set value and the second set value; An auxiliary power supply module: connected to the processing module and the trigger module, for supplying power to the processing module to enable the power tool to work properly.

6. A control method for power-on judgment, the control method being applicable to a power tool, the power tool including an auxiliary power supply circuit, characterized in that, The method includes: S1: The MCU pre-stores a first set value of the battery pack voltage and a minimum second set value of the switch level signal; S2: Close the trigger switch; S3: Detect the voltage of the battery pack; S4: Judge whether the voltage of the battery pack is greater than the first set value. If not, the motor stops. Otherwise, go to step S5; S5: Detect the switch level signal of the trigger switch; S6: Judge whether the switch level signal is greater than the second set value. If not, the motor stops. Otherwise, control the power tool to start working.

7. The control method for power-on judgment according to claim 6, characterized in that: The pre-stored second set value of the switch level signal is 200, and the first set value of the battery pack voltage is 2V.

8. The control method for power-on judgment according to claim 6, characterized in that: The MCU is connected to the AD_V terminal of the auxiliary power supply circuit. The auxiliary power supply circuit supplies voltage to the MCU. The MCU detects the voltage of the AD_V terminal, compares the voltage of the AD_V terminal with the first set value, and judges whether the trigger switch is closed according to the comparison result.

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

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