Intelligent chain saw control system based on brushless driving and control method thereof

Abstract

The invention belongs to the technical field of electric control for chain saws, and relates to an intelligent chain saw control system based on brushless driving and a control method thereof. The system comprises a bridging chip U4, a power supply voltage stabilization module, a voltage and current detection module, a brushless motor driving module, a software control module, a switch control and state feedback module, a saw chain tension self-adaptive adjustment module and a temperature monitoring module which are electrically connected, and the output end of the controller is respectively connected with the bridging chip U4, the brushless motor driving module, the software control module, the switch control and state feedback module, the saw chain tension self-adaptive adjusting module and the temperature monitoring module. Intelligent dynamic adjustment of chain saw motor output can be achieved, and the cutting efficiency is improved; energy consumption and noise can be reduced, and the battery life is prolonged; the safety and the cutting precision can be improved through automatic tension adjustment; fault detection and remote interface debugging can be supported, and the development requirements of intelligent tools are met.

Description

Technical Field

[0001] This invention relates to the field of electronic control technology for chainsaws, and more specifically, to an intelligent chainsaw control system and control method based on brushless drive. Background Technology

[0002] Chainsaws, as specialized power tools, play a crucial role in various fields such as forestry, horticulture, construction, and emergency rescue. They mainly consist of core components such as an engine (or electric motor), transmission mechanism, saw chain, and guide plate. The engine provides power, which drives the saw chain to rotate at high speed on the guide plate through the transmission mechanism, thereby achieving the cutting of materials such as wood.

[0003] Most existing chainsaws use traditional brush motors or simple control methods, which cannot dynamically adjust the output power according to the load, easily leading to excessive energy consumption, abnormal chain tension, or overload damage. Furthermore, they lack voltage and current monitoring and intelligent feedback mechanisms, failing to meet the requirements for efficient, energy-saving, and stable operation. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a brushless drive-based intelligent chainsaw control system, comprising:

[0005] The system is electrically connected to a bridging chip U4, a power supply regulator module, a voltage and current detection module, a brushless motor drive module, a software control module, a switch control and status feedback module, a chainsaw tension adaptive adjustment module, and a temperature monitoring module. The power supply regulator module provides the operating voltage to the system, and its output is connected to the bridging chip U4, the brushless motor drive module, the software control module, the switch control and status feedback module, the chainsaw tension adaptive adjustment module, and the temperature monitoring module. The bridging chip U4 connects the software control module and the brushless motor drive module to transmit control signals. The voltage and current detection module is connected in parallel to the power supply line of the brushless motor drive module to monitor voltage and current information in real time and feed the data back to the software control module. The switch control and status feedback module receives switch operation signals from the user and feeds back the chainsaw's working status to the software control module. The chainsaw tension adaptive adjustment module detects the chainsaw tension and sends an adjustment signal to the brushless motor drive module. The temperature monitoring module monitors the system temperature and is connected to the software control module.

[0006] Preferably, the power supply voltage regulator module includes: pin 1 of voltage regulator U1 is connected to pin 3 of voltage regulator U2, one end of capacitor C9, and one end of capacitor C8 respectively; pin 1 of voltage regulator U2 is connected to one end of capacitor C10 and one end of capacitor C23 respectively; the other end of capacitor C23 is connected to the other end of capacitor C10, pin 2 of voltage regulator U2, the other end of capacitor C8, the other end of capacitor C9, pin 2 of voltage regulator U1, one end of capacitor C11, one end of capacitor C13, one end of resistor R11, one end of capacitor C24, the emitter of transistor Q2, and one end of resistor R27 respectively; pin 3 of voltage regulator U1 is connected to the other end of capacitor C11, One end of resistor R2 is connected to the drain of MOSFET Q1 and one end of resistor R7. The other end of resistor R7 is connected to the other end of resistor R11 and the other end of capacitor C13. The gate of MOSFET Q1 is connected to one end of resistor R5 and one end of resistor R3. The source of MOSFET Q1 is connected to the other end of resistor R3. The other end of resistor R5 is connected to the anode of diode D4, the collector of transistor Q2, and the other end of capacitor C24. The base of transistor Q2 is connected to one end of resistor R8. The cathode of diode D4 is connected to the cathode of diode D5. The anode of diode D5 is connected to one end of resistor R67.

[0007] Preferably, the voltage and current detection module includes: the negative terminal of capacitor C25 is connected to the negative terminal of capacitor C32 and one end of capacitor C12 and grounded; the positive terminal of capacitor C25 is connected to the positive terminal of capacitor C32, the other end of capacitor C12, the drain of field-effect transistor Q3, the drain of field-effect transistor Q6, the drain of field-effect transistor Q5, the drain of field-effect transistor Q8, the drain of field-effect transistor Q4, and the drain of field-effect transistor Q7; the source of field-effect transistor Q3 is connected to the three-phase motor port U, one end of resistor R22, the source of field-effect transistor Q6, one end of resistor R24, the drain of field-effect transistor Q11, and the drain of field-effect transistor Q14; the gate of field-effect transistor Q3 is connected to the other end of resistor R22 and one end of resistor R15; the gate of field-effect transistor Q6 is connected to the other end of resistor R24 ​​and the other end of resistor R18. One end is connected, and the other end of resistor R18 is connected to the other end of resistor R15. The source of MOSFET Q11 is connected to one end of resistor R61, the source of MOSFET Q14, one end of resistor R64, the source of MOSFET Q10, one end of resistor R31, one end of resistor R26, one end of resistor R25, one end of resistor R60, the source of MOSFET Q13, one end of resistor R63, the source of MOSFET Q9, one end of resistor R59, the source of MOSFET Q12, and one end of resistor R62. The source of MOSFET Q5 is connected to the three-phase motor port V, one end of resistor R20, the source of MOSFET Q8, and one end of resistor R23. The source of MOSFET Q4 is connected to the three-phase motor port W, one end of resistor R21, the source of MOSFET Q7, and one end of resistor R19.

[0008] Preferably, the brushless motor drive module includes: the positive terminal of diode D6 is connected to one end of resistor R70; the other end of resistor R70 is connected to one end of resistor R69 and the base of transistor Q16; the other end of resistor R69 is connected to one end of resistor R68, the emitter of transistor Q16, and one end of capacitor C26; the collector of transistor Q16 is connected to one end of resistor R71; the other end of resistor R71 is connected to one end of resistor R72; and the other end of resistor R72 is connected to one end of capacitor C26 and grounded.

[0009] Preferably, the software control module includes: pin 1 of the MCU is connected to one end of resistor R73 and one end of resistor R74 respectively; pin 3 of the MCU is connected to one end of resistor R75; pin 4 of the MCU is connected to one end of resistor R76; and pin 5 of the MCU is connected to the negative terminal of diode D7, the negative terminal of diode D8, and one end of 0Ω resistor NC respectively.

[0010] Preferably, the switch control and status feedback module includes: the negative terminal of LED1 is connected to the negative terminal of LED2, the negative terminal of LED3 is connected to the negative terminal of LED4, and the negative terminal of LED5 is connected to the negative terminal of LED6.

[0011] Preferably, the saw chain tension adaptive adjustment module includes: one end of resistor R52 is connected to one end of resistor R37, one end of resistor R40, and one end of resistor R42 respectively; the other end of resistor R37 is connected to one end of capacitor C18, one end of resistor R39, and one end of resistor R33 respectively; the other end of resistor R40 is connected to one end of capacitor C19, one end of resistor R32, and one end of resistor R41 respectively; and the other end of resistor R42 is connected to one end of capacitor C20, one end of resistor R35, and one end of resistor R43 respectively.

[0012] Preferably, the temperature monitoring module includes: one end of resistor R9 is connected to one end of resistor NTC1 and one end of capacitor C14 respectively, and the other end of resistor NTC1 is connected to the other end of capacitor C14 and grounded.

[0013] Preferably, the bridging chip U4 includes: ASM3236L.

[0014] On the other hand, the present invention provides a control method for a brushless-driven intelligent chainsaw control system, applied to the brushless-driven intelligent chainsaw control system described above, comprising the following steps:

[0015] Initialize the bridging chip U4, power supply regulator module, voltage and current detection module, brushless motor drive module, software control module, switch control and status feedback module, saw chain tension adaptive adjustment module and temperature monitoring module.

[0016] The switch control and status feedback module monitors the user's switch operation signals in real time.

[0017] The voltage and current detection module is connected in parallel to the power supply line of the brushless motor drive module to collect voltage and current signals in real time and convert them into digital signals for transmission to the software control module.

[0018] The saw chain tension adaptive adjustment module detects the tension of the saw chain in real time through built-in sensors and converts the detected tension signal into a digital signal to send to the software control module;

[0019] The temperature monitoring module monitors the temperature of the chainsaw in real time and transmits the temperature data to the software control module through the communication interface.

[0020] The switch control and status feedback module feeds back the chainsaw's working status information to the software control module in real time.

[0021] The intelligent chainsaw control system and control method based on brushless drive of the present invention have the following beneficial effects: By employing a bridge chip U4, a power supply regulator module, a voltage and current detection module, a brushless motor drive module, a software control module, a switch control and status feedback module, a chainsaw tension adaptive adjustment module, and a temperature monitoring module connected by electrical connections, intelligent dynamic adjustment of the chainsaw motor output can be achieved, improving cutting efficiency; energy consumption and noise can be reduced, extending battery life; automatic tension adjustment can improve safety and cutting accuracy; and fault detection and remote debugging interfaces can be supported, adapting to the development needs of intelligent tools. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort. The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0023] Figure 1 This is a schematic diagram of the module structure of the intelligent chainsaw control system based on brushless drive of the present invention.

[0024] Figure 2 This is a circuit diagram of the power supply voltage regulator module in the intelligent chainsaw control system based on brushless drive of this invention;

[0025] Figure 3 This is a circuit diagram of the voltage and current detection module in the intelligent chainsaw control system based on brushless drive of the present invention.

[0026] Figure 4 This is a circuit diagram of the brushless motor drive module in the intelligent chainsaw control system based on brushless drive of the present invention.

[0027] Figure 5 This is a circuit diagram of the software control module in the intelligent chainsaw control system based on brushless drive of the present invention.

[0028] Figure 6 This is a circuit diagram of the switch control and status feedback module in the intelligent chainsaw control system based on brushless drive of this invention.

[0029] Figure 7 This is a circuit diagram of the saw chain tension adaptive adjustment module in the intelligent chainsaw control system based on brushless drive of the present invention.

[0030] Figure 8 This is a circuit diagram of the temperature monitoring module in the intelligent chainsaw control system based on brushless drive of the present invention.

[0031] Figure 9 This is a circuit diagram of the bridge chip U4 in the intelligent chainsaw control system based on brushless drive of this invention.

[0032] Figure 10 This is a flowchart of the control method of the intelligent chainsaw control system based on brushless drive according to the present invention. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0036] Example 1

[0037] Please see Figure 1 This is a schematic diagram of the module structure of the intelligent chainsaw control system based on brushless drive according to the present invention. Figure 1As shown, the intelligent chainsaw control system based on brushless drive provided in the first embodiment of the present invention includes at least a bridging chip U4, a power supply regulator module, a voltage and current detection module, a brushless motor drive module, a software control module, a switch control and status feedback module, a chainsaw tension adaptive adjustment module, and a temperature monitoring module, all electrically connected. The power supply regulator module provides the operating voltage for the system, and its output terminal is connected to the bridging chip U4, the brushless motor drive module, the software control module, the switch control and status feedback module, the chainsaw tension adaptive adjustment module, and the temperature monitoring module, respectively. The bridging chip U4 connects the software control module and the brushless motor drive module to realize the transmission of control signals. The voltage and current detection module is connected in parallel to the power supply line of the brushless motor drive module to monitor voltage and current information in real time and feed the data back to the software control module. The switch control and status feedback module receives switch operation signals from the user and feeds back the working status of the chainsaw to the software control module. The chainsaw tension adaptive adjustment module detects the chainsaw tension and sends the adjustment signal to the brushless motor drive module. The temperature monitoring module monitors the system temperature and is connected to the software control module.

[0038] Figure 2 This is a circuit diagram of the power supply voltage regulator module in the intelligent chainsaw control system based on brushless drive of this invention. Figure 2 As shown, the power supply regulator module includes: pin 1 of regulator U1 is connected to pin 3 of regulator U2, one end of capacitor C9, and one end of capacitor C8 respectively; pin 1 of regulator U2 is connected to one end of capacitor C10 and one end of capacitor C23 respectively; the other end of capacitor C23 is connected to the other end of capacitor C10, pin 2 of regulator U2, the other end of capacitor C8, the other end of capacitor C9, pin 2 of regulator U1, one end of capacitor C11, one end of capacitor C13, one end of resistor R11, one end of capacitor C24, the emitter of transistor Q2, and one end of resistor R27 respectively; pin 3 of regulator U1 is connected to the other end of capacitor C11, the other end of capacitor C23, the other end of capacitor C24, the emitter of transistor Q2, and one end of resistor R27 respectively. One end of resistor R2 is connected to the drain of MOSFET Q1 and one end of resistor R7. The other end of resistor R7 is connected to the other end of resistor R11 and the other end of capacitor C13. The gate of MOSFET Q1 is connected to one end of resistor R5 and one end of resistor R3. The source of MOSFET Q1 is connected to the other end of resistor R3. The other end of resistor R5 is connected to the anode of diode D4, the collector of transistor Q2, and the other end of capacitor C24. The base of transistor Q2 is connected to one end of resistor R8. The cathode of diode D4 is connected to the cathode of diode D5. The anode of diode D5 is connected to one end of resistor R67.

[0039] Three-terminal voltage regulators (such as 78L12 and 78L05) are used to regulate the input voltage, providing +12V and +5V power supplies for stable system operation. External capacitors are used for filtering to suppress ripple and avoid interference.

[0040] Figure 3 This is a circuit diagram of the voltage and current detection module in the brushless drive-based intelligent chainsaw control system of this invention. Figure 3 As shown, the voltage and current detection module includes: the negative terminal of capacitor C25 is connected to the negative terminal of capacitor C32 and one end of capacitor C12 and grounded; the positive terminal of capacitor C25 is connected to the positive terminal of capacitor C32, the other end of capacitor C12, the drain of MOSFET Q3, the drain of MOSFET Q6, the drain of MOSFET Q5, the drain of MOSFET Q8, the drain of MOSFET Q4, and the drain of MOSFET Q7; the source of MOSFET Q3 is connected to the three-phase motor port U, one end of resistor R22, the source of MOSFET Q6, one end of resistor R24, the drain of MOSFET Q11, and the drain of MOSFET Q14; the gate of MOSFET Q3 is connected to the other end of resistor R22 and one end of resistor R15; the gate of MOSFET Q6 is connected to the other end of resistor R24 ​​and one end of resistor R18. The connection is as follows: the other end of resistor R18 is connected to the other end of resistor R15; the source of MOSFET Q11 is connected to one end of resistor R61, the source of MOSFET Q14, one end of resistor R64, the source of MOSFET Q10, one end of resistor R31, one end of resistor R26, one end of resistor R25, one end of resistor R60, the source of MOSFET Q13, one end of resistor R63, the source of MOSFET Q9, one end of resistor R59, the source of MOSFET Q12, and one end of resistor R62; the source of MOSFET Q5 is connected to the three-phase motor port V, one end of resistor R20, the source of MOSFET Q8, and one end of resistor R23; and the source of MOSFET Q4 is connected to the three-phase motor port W, one end of resistor R21, the source of MOSFET Q7, and one end of resistor R19.

[0041] A high-precision resistor network (sampling resistor) is used to sample the U, V, and W phase motor ports (e.g., Bef U, Bef V, Bef W). Combined with capacitor filtering, the output is sent to the ADC interface for real-time reading by the main control MCU, reflecting the current voltage, current, and load status.

[0042] Figure 4 This is a circuit diagram of the brushless motor drive module in the intelligent chainsaw control system based on brushless drive of this invention. Figure 4As shown, the brushless motor drive module includes: the positive terminal of diode D6 is connected to one end of resistor R70; the other end of resistor R70 is connected to one end of resistor R69 and the base of transistor Q16; the other end of resistor R69 is connected to one end of resistor R68, the emitter of transistor Q16, and one end of capacitor C26; the collector of transistor Q16 is connected to one end of resistor R71; the other end of resistor R71 is connected to one end of resistor R72; and the other end of resistor R72 is connected to one end of capacitor C26 and grounded.

[0043] Composed of multiple MOSFETs (such as AP0N03BD), it realizes the switching control of the three-phase power output of the brushless motor. The drive signal is output by the MCU and conditioned to the gate of the MOSFET through a current-limiting resistor.

[0044] Figure 5 This is a circuit diagram of the software control module in the intelligent chainsaw control system based on brushless drive of this invention. (See diagram below.) Figure 5 As shown, the software control module includes: pin 1 of the MCU is connected to one end of resistor R73 and one end of resistor R74 respectively; pin 3 of the MCU is connected to one end of resistor R75; pin 4 of the MCU is connected to one end of resistor R76; and pin 5 of the MCU is connected to the negative terminal of diode D7, the negative terminal of diode D8, and one end of 0Ω resistor NC respectively.

[0045] The control core is an embedded MCU that acquires voltage and current signals. Based on load changes and motor resistance, it calculates the optimal output voltage in real time using control algorithms such as PID. The control signal is then output to the switching circuit and power drive module to achieve dynamic voltage adjustment.

[0046] Figure 6 This is a circuit diagram of the switch control and status feedback module in the intelligent chainsaw control system based on brushless drive of this invention. Figure 6 As shown, the switch control and status feedback module includes: the negative terminal of LED1 is connected to the negative terminal of LED2, the negative terminal of LED3 is connected to the negative terminal of LED4, and the negative terminal of LED5 is connected to the negative terminal of LED6.

[0047] A switching circuit composed of transistors (such as MMBT5401) is controlled to conduct according to the KEY EN signal output by the MCU, realizing the switching voltage and current output. An LED status indicator module is configured to display the power level and output position respectively (e.g., LED1 and LED2 form "Power Level 1" and "Power Level 2" display, LED3 and LED4 form "Power Level 3" and "Position 1" display, and LED5 and LED6 form "Power Level 2" and "Position 3" display).

[0048] Figure 7This is a circuit diagram of the adaptive chain tension adjustment module in the intelligent chainsaw control system based on brushless drive of this invention. Figure 7 As shown, the saw chain tension adaptive adjustment module includes: one end of resistor R52 is connected to one end of resistor R37, one end of resistor R40, and one end of resistor R42 respectively; the other end of resistor R37 is connected to one end of capacitor C18, one end of resistor R39, and one end of resistor R33 respectively; the other end of resistor R40 is connected to one end of capacitor C19, one end of resistor R32, and one end of resistor R41 respectively; and the other end of resistor R42 is connected to one end of capacitor C20, one end of resistor R35, and one end of resistor R43 respectively.

[0049] The system integrates a tension sensor to detect the saw chain tension in real time. The control unit (software control module) drives the tension actuator (such as a servo or electromagnetic mechanism) to adjust the saw chain tension according to the software output instructions.

[0050] Figure 8 This is a circuit diagram of the temperature monitoring module in the intelligent chainsaw control system based on brushless drive of this invention. Figure 8 As shown, the temperature monitoring module includes: one end of resistor R9 is connected to one end of resistor NTC1 and one end of capacitor C14 respectively, and the other end of resistor NTC1 is connected to the other end of capacitor C14 and grounded.

[0051] Figure 9 This is a circuit diagram of the bridge chip U4 in the intelligent chainsaw control system based on brushless drive of this invention. Figure 9 As shown, the bridge chip U4 includes: ASM3236L.

[0052] In specific implementation, the intelligent chainsaw control system based on brushless drive of the present invention can also be equipped with a serial communication module: data interaction with external debugging or remote modules is performed through TX / RX, and ESD protection circuit is set to improve interface reliability.

[0053] In specific implementation, the intelligent chainsaw control system based on brushless drive of the present invention may also include a display screen. The display screen is bidirectionally connected to the software control module. The display screen is an LED display screen (resolution 128*64) and has four voltage automatic adjustment level display areas (corresponding to battery voltage, for example: 21V (full charge), 19V (high charge), 20V (medium charge), 16V (low charge)), which displays the current voltage level and the real-time motor current.

[0054] The working principle of the intelligent chainsaw control system based on brushless drive in this invention is as follows: When the user presses the switch, the switch control and status feedback module transmits a start signal to the software control module. Upon receiving the signal, the software control module sends a control command to the brushless motor drive module via the bridge chip U4, driving the brushless motor to operate and the chainsaw to begin working. During operation, the voltage and current detection module monitors the voltage and current in real time. If any abnormality is detected, it immediately feeds the information back to the software control module. The software control module then takes timely measures according to a preset protection strategy, such as reducing the motor speed or stopping the motor, to protect system safety. The chainsaw tension adaptive adjustment module detects the chainsaw tension through sensors. When the tension is too high or too low, it automatically adjusts the output of the brushless motor to restore the chainsaw tension to normal. Simultaneously, the temperature monitoring module monitors the temperature of the MOSFET, battery, etc., and sends the monitored temperature information to the software control module, enabling intelligent temperature control.

[0055] Example 2

[0056] Figure 10 This is a flowchart of the control method for the intelligent chainsaw control system based on brushless drive, as described in this invention. Figure 10 As shown, the control method for a brushless-driven intelligent chainsaw control system, applied to the brushless-driven intelligent chainsaw control system as described in Embodiment 1, includes the following steps:

[0057] S1 initializes the bridging chip U4, power supply regulator module, voltage and current detection module, brushless motor drive module, software control module, switch control and status feedback module, saw chain tension adaptive adjustment module, and temperature monitoring module.

[0058] Upon system power-up, the software control module starts first, initializing each module. This includes setting the communication parameters of the bridge chip U4, configuring the initial operating mode of the brushless motor drive module, calibrating the measurement accuracy of the voltage and current detection module, initializing the input / output interfaces of the switch control and status feedback module, setting the detection threshold of the saw chain tension adaptive adjustment module, and configuring the communication protocol of the temperature monitoring module. After initialization, the software control module performs self-tests on each module sequentially, determining whether each module is functioning correctly by sending specific test signals and detecting the feedback results.

[0059] System initialization and self-test are fundamental to ensuring stable system operation. Initialization provides each module with the correct operating parameters and configurations, placing it in a ready-to-operate initial state. The self-test process promptly detects module faults or anomalies, preventing safety issues or performance degradation caused by module malfunctions during chainsaw operation, thus improving system reliability and stability.

[0060] S2, the switch control and status feedback module monitors the user's switch operation signals in real time.

[0061] When the user presses a start, stop, or speed control switch, the module converts the corresponding operation signal into a digital signal and transmits it to the software control module. The software control module analyzes the received signal to determine the user's intention.

[0062] Receiving user commands is a crucial step in the interaction between the user and the chainsaw control system. By accurately interpreting the user's intentions, the software control module can control the chainsaw's operating status according to the user's needs, such as starting the chainsaw, adjusting the motor speed, or stopping the chainsaw, thus enabling convenient operation and flexible control of the chainsaw.

[0063] S3, the voltage and current detection module is connected in parallel to the power supply line of the brushless motor drive module, to collect voltage and current signals in real time, and convert them into digital signals for transmission to the software control module.

[0064] The software control module analyzes the received voltage and current data to determine whether they are within the normal operating range. When the voltage or current exceeds the set safety threshold, the software control module immediately takes protective measures, such as reducing the motor speed or cutting off the power supply, and simultaneously issues an alarm message to the user.

[0065] Voltage and current monitoring and protection functions effectively prevent damage to the system caused by abnormal voltage or overload current. Through real-time monitoring and timely protection, the brushless motor drive module and other related modules are ensured to operate under safe working conditions, extending the system's service life and improving the safety of chainsaw operation.

[0066] S4, the saw chain tension adaptive adjustment module detects the tension of the saw chain in real time through built-in sensors, and converts the detected tension signal into a digital signal and sends it to the software control module.

[0067] The software control module calculates a suitable adjustment signal based on a preset tension threshold and the chainsaw's operating state, and transmits this signal to the brushless motor drive module via the bridging chip U4. The brushless motor drive module adjusts the motor's output power according to the received adjustment signal, thereby achieving adaptive adjustment of the chainsaw tension.

[0068] The chainsaw tension adaptive adjustment function can automatically adjust the chainsaw tension according to the actual working conditions, ensuring that the chainsaw maintains a suitable tension state at all times during operation. This not only improves the cutting efficiency and quality of the chainsaw, but also reduces the wear and breakage risk of the chainsaw, extends the service life of the chainsaw, and improves the stability and safety of the chainsaw operation.

[0069] The software algorithm flow of the software control module is as follows:

[0070] Sampling stage: Voltage and current signals are acquired by the sampling circuit and sent to the MCU's ADC.

[0071] Analysis phase: The MCU runs algorithms such as PID to analyze the current load and motor operating status, and determines whether there is overload or inefficient operation.

[0072] Adjustment phase: Calculate the most suitable output voltage for the current load and issue a control signal.

[0073] Execution phase: The power drive module adjusts the voltage output and simultaneously controls the tension system to adjust synchronously.

[0074] Feedback phase: The status is fed back to the MCU and displayed on the LED panel to achieve closed-loop control.

[0075] S5, the temperature monitoring module monitors the temperature of the chainsaw in real time and transmits the temperature data to the software control module through the communication interface.

[0076] The temperature monitoring module monitors the temperature of key components of the chainsaw in real time, such as the motor temperature and the saw chain temperature, and transmits the temperature data to the software control module via a communication interface. The software control module analyzes and processes the temperature data, and when the detected temperature exceeds a set safety threshold, it takes corresponding protective measures, such as reducing motor speed or suspending operation. Simultaneously, the temperature monitoring module can also interact with external devices (such as mobile phones and computers) via the communication interface, allowing users to view the chainsaw's temperature information in real time and remotely control and configure the system.

[0077] Temperature monitoring and data interaction functions enable timely monitoring of the chainsaw's temperature, preventing equipment damage or safety accidents caused by overheating. Through data interaction with external devices, users can more easily understand the chainsaw's operating status, achieving remote monitoring and management, thus improving the chainsaw's ease of use and intelligence.

[0078] S6, the switch control and status feedback module, feeds back the chainsaw's working status information to the software control module in real time.

[0079] The switch control and status feedback module feeds back the chainsaw's operating status, such as motor speed, chain tension, and temperature, to the software control module in real time. The software control module processes and analyzes this feedback information and displays it to the user through a screen (such as the chainsaw's display or an external device's display). Simultaneously, the software control module records the system's operating status data, storing it in local storage or uploading it to a cloud server for subsequent fault diagnosis, performance analysis, and optimization.

[0080] The system status feedback and recording function allows users to intuitively understand the chainsaw's operating status and promptly identify potential problems and anomalies. The recorded operating status data provides crucial information for subsequent troubleshooting and system optimization, helping to improve the chainsaw's performance and reliability, and driving the continuous development and improvement of intelligent chainsaw control systems.

[0081] The beneficial effects of the present invention through the above embodiments are: it can realize intelligent dynamic adjustment of the chainsaw motor output, thereby improving cutting efficiency; it can reduce energy consumption and noise, and extend battery life; it can automatically adjust tension to improve safety and cutting accuracy; and it can support fault detection and remote debugging interfaces to meet the development needs of intelligent tools.

[0082] This invention has been described with reference to specific embodiments, but those skilled in the art will understand that various changes and equivalent substitutions can be made without departing from the scope of the invention. Furthermore, numerous modifications can be made to this invention to suit specific applications without departing from its protection scope. Therefore, this invention is not limited to the specific embodiments disclosed herein, but includes all embodiments falling within the scope of the claims.

Claims

1. A control system for an intelligent chain saw based on brushless drive, characterized in that, The system comprises a bridge chip U4 connected by an electrical connection, a power stabilizing module, a voltage and current detection module, a brushless motor driving module, a software control module, a switch control and state feedback module, a saw chain tension adaptive adjustment module and a temperature monitoring module, the power stabilizing module provides working voltage for the system, and the output ends of the power stabilizing module are connected with the bridge chip U4, the brushless motor driving module, the software control module, the switch control and state feedback module, the saw chain tension adaptive adjustment module and the temperature monitoring module respectively, the bridge chip U4 is connected with the software control module and the brushless motor driving module to realize transmission of control signals, the voltage and current detection module is connected in parallel on the power supply circuit of the brushless motor driving module to monitor voltage and current information in real time and feed back data to the software control module, the switch control and state feedback module receives switch operation signals from a user on one hand and feeds back working states of the chain saw to the software control module on the other hand, the saw chain tension adaptive adjustment module is used for detecting saw chain tension and sending adjustment signals to the brushless motor driving module, and the temperature monitoring module is connected with the software control module and used for monitoring system temperature. The power stabilizing module comprises a pin 1 of a stabilizer U1 connected with a pin 3 of a stabilizer U2, one end of a capacitor C9 and one end of a capacitor C8 respectively, a pin 1 of the stabilizer U2 connected with one end of a capacitor C10 and one end of a capacitor C23 respectively, the other end of the capacitor C23 connected with the other end of the capacitor C10, a pin 2 of the stabilizer U2, the other end of the capacitor C8, the other end of the capacitor C9, a pin 2 of the stabilizer U1, one end of a capacitor C11, one end of a capacitor C13, one end of a resistor R11, one end of a capacitor C24, an emitter of a triode Q2 and one end of a resistor R27 respectively, a pin 3 of the stabilizer U1 connected with the other end of the capacitor C11 and one end of a resistor R2 respectively, the other end of the resistor R2 connected with a drain of a MOS tube Q1 and one end of a resistor R7 respectively, the other end of the resistor R7 connected with the other end of the resistor R11 and the other end of the capacitor C13 respectively, a gate of the MOS tube Q1 connected with one end of a resistor R5 and one end of a resistor R3 respectively, a source of the MOS tube Q1 connected with the other end of the resistor R3, the other end of the resistor R5 connected with a positive electrode of a diode D4, a collector of the triode Q2 and the other end of the capacitor C24 respectively, a base of the triode Q2 connected with one end of a resistor R8, a negative electrode of the diode D4 connected with a negative electrode of a diode D5, and a positive electrode of the diode D5 connected with one end of a resistor R67.

2. The intelligent chain saw control system based on brushless drive according to claim 1, characterized in that, ​ 3. The intelligent brushless drive based chain saw control system of claim 1, wherein, The voltage and current detection module comprises: a negative electrode of a capacitor C25 is connected with a negative electrode of a capacitor C32 and one end of a capacitor C12 and grounded, a positive electrode of the capacitor C25 is connected with a positive electrode of the capacitor C32, another end of the capacitor C12, a drain electrode of a field effect transistor Q3, a drain electrode of a field effect transistor Q6, a drain electrode of a field effect transistor Q5, a drain electrode of a field effect transistor Q8, a drain electrode of a field effect transistor Q4, and a drain electrode of a field effect transistor Q7, a source electrode of the field effect transistor Q3 is connected with a three-phase motor port U, one end of a resistor R22, a source electrode of the field effect transistor Q6, one end of a resistor R24, a drain electrode of a field effect transistor Q11, and a drain electrode of a field effect transistor Q14, a gate electrode of the field effect transistor Q3 is connected with another end of the resistor R22 and one end of a resistor R15, a gate electrode of the field effect transistor Q6 is connected with another end of the resistor R24 and one end of a resistor R18, another end of the resistor R18 is connected with another end of the resistor R15, a source electrode of the field effect transistor Q11 is connected with one end of a resistor R61, a source electrode of the field effect transistor Q14, one end of a resistor R64, a source electrode of a field effect transistor Q10, one end of a resistor R31, one end of a resistor R26, one end of a resistor R25, one end of a resistor R60, a source electrode of a field effect transistor Q13, one end of a resistor R63, a source electrode of a field effect transistor Q9, one end of a resistor R59, a source electrode of a field effect transistor Q12, and one end of a resistor R62, a source electrode of the field effect transistor Q5 is connected with a three-phase motor port V, one end of a resistor R20, a source electrode of the field effect transistor Q8, and one end of a resistor R23, and a source electrode of the field effect transistor Q4 is connected with a three-phase motor port W, one end of a resistor R21, a source electrode of the field effect transistor Q7, and one end of a resistor R19.

4. The intelligent brushless drive based chain saw control system of claim 1, wherein, The brushless motor driving module comprises: a positive electrode of a diode D6 is connected with one end of a resistor R70, another end of the resistor R70 is connected with one end of a resistor R69 and a base electrode of a triode Q16, another end of the resistor R69 is connected with one end of a resistor R68, an emitter electrode of the triode Q16, and one end of a capacitor C26, a collector electrode of the triode Q16 is connected with one end of a resistor R71, another end of the resistor R71 is connected with one end of a resistor R72, another end of the resistor R72 is connected with one end of the capacitor C26 and grounded.

5. The intelligent brushless drive based chain saw control system of claim 1, wherein, The software control module comprises: one end of a resistor R73 and one end of a resistor R74 are connected with a pin 1 of an MCU, one end of a resistor R75 is connected with a pin 3 of the MCU, one end of a resistor R76 is connected with a pin 4 of the MCU, a negative electrode of a diode D7, a negative electrode of a diode D8, and one end of a 0Ω resistor NC are connected with a pin 5 of the MCU.

6. The intelligent brushless drive based chain saw control system of claim 1, wherein, The switch control and state feedback module comprises: a negative electrode of an LED1 is connected with a negative electrode of an LED2, a negative electrode of an LED3 is connected with a negative electrode of an LED4, and a negative electrode of an LED5 is connected with a negative electrode of an LED6.

7. The brushless drive-based intelligent chain saw control system of claim 1, wherein, The saw chain tension self-adaptive adjusting module comprises: one end of the resistor R52 is connected with one end of the resistor R37, one end of the resistor R40 and one end of the resistor R42 respectively, the other end of the resistor R37 is connected with one end of the capacitor C18, one end of the resistor R39 and one end of the resistor R33 respectively, the other end of the resistor R40 is connected with one end of the capacitor C19, one end of the resistor R32 and one end of the resistor R41 respectively, and the other end of the resistor R42 is connected with one end of the capacitor C20, one end of the resistor R35 and one end of the resistor R43 respectively.

8. The brushless drive-based intelligent chain saw control system of claim 1, wherein, The temperature monitoring module comprises: one end of the resistor R9 is connected with one end of the resistor NTC1 and one end of the capacitor C14 respectively, and the other end of the resistor NTC1 is connected with the other end of the capacitor C14 and grounded.

9. The intelligent brushless drive based chain saw control system of any of claims 1 to 8, characterized by, The bridge chip U4 comprises: ASM3236L.

10. A control method of a control system of an intelligent chain saw based on brushless drive, characterized by, The application is applied to the intelligent chain saw control system based on brushless driving as claimed in any one of claims 1 to 9, comprising the steps of: initializing settings of the bridge chip U4, the power supply voltage stabilizing module, the voltage and current detection module, the brushless motor driving module, the software control module, the switch control and state feedback module, the saw chain tension self-adaptive adjusting module and the temperature monitoring module; The switch control and state feedback module monitors the switch operation signal of the user in real time. The voltage and current detection module is connected in parallel on the power supply circuit of the brushless motor driving module, collects voltage and current signals in real time, and converts them into digital signals to transmit to the software control module. The saw chain tension self-adaptive adjusting module detects the tension of the saw chain in real time through the built-in sensor, converts the detected tension signal into a digital signal and sends it to the software control module. The temperature monitoring module monitors the temperature of the chain saw in real time and transmits the temperature data to the software control module through the communication interface. The switch control and state feedback module feeds back the working state information of the chain saw to the software control module in real time.

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