An electric spool and its control system

Abstract

This application provides an electric spool and its control system. The control system includes a control unit, a switching unit, an energy storage unit, a residual power management unit, and a monitoring unit. The monitoring unit monitors the status of the electric spool during the casting and reeling processes. The control unit selects the control mode for the electric spool based on the monitoring results and switches the charging and discharging mode of the energy storage unit's drive circuit for the electric spool via the switching unit. The control modes include acceleration mode, braking mode, and reeling mode. The residual power management unit is electrically connected to the drive circuit of the electric spool through terminals and charges the energy storage unit from the drive circuit in braking and reeling modes. The technical solution of this application can fully utilize the energy generated by the braking of the electric spool, effectively increasing the casting distance while preventing line breakage.

Description

Technical Field

[0001] This application belongs to the field of fishing equipment technology, and relates to electric spool control technology. Specifically, it provides an electric spool and its control system. Background Technology

[0002] Electric spools are increasingly being used in the fishing tackle industry. Generally, existing electric spools use the principle of electromagnetic induction to brake the spool in the latter half of the casting process to prevent the fishing line from getting tangled due to the spool's rotation speed exceeding the forward speed of the hook.

[0003] Although the aforementioned electric spool with brake can effectively solve the problem of spool backlash and line breakage, in the first half of the casting process, the spool's own inertia causes it to exert a drag force on the fishing line in the opposite direction of casting. If it cannot be accelerated quickly at this time, the drag force will significantly consume the kinetic energy of the hook's forward movement, thus leading to a shortening of the final casting distance.

[0004] Therefore, the speed control of the electric spool should be maintained throughout the entire casting process, and the device for accelerating the electric spool should be integrated into the existing circuit of the electric spool as much as possible to avoid increasing the size and weight of the spool due to the addition of an extra power supply structure. Summary of the Invention

[0005] To address the problems existing in the prior art, the first aspect of this application provides an electric spool control system for controlling the acceleration, braking, and reeling stroke of the electric spool, wherein the electric spool is used to wind fishing line.

[0006] The control system includes a control unit, a switching unit, an energy storage unit, a residual power management unit, and a monitoring unit;

[0007] The monitoring unit monitors the status of the electric spool during the line feeding and reeling processes. The control unit selects the control mode for the electric spool based on the monitoring results and switches the charging / discharging mode of the energy storage unit's drive circuit for the electric spool via a switching unit. The control modes include acceleration mode, braking mode, and reeling mode. The rotation direction of the electric spool in reeling mode is opposite to that in acceleration and braking modes. The residual power management unit is electrically connected to the drive circuit of the electric spool via terminals. When the voltage at the terminals is less than a preset residual power charging voltage, the energy storage unit charges the energy storage unit from the drive circuit.

[0008] Furthermore, the first end of the energy storage unit is grounded; the first end of the switching unit is electrically connected to the second end of the energy storage unit, and the second end is electrically connected to the terminal block. The control unit receives the mode signal sent by the control unit and controls the current direction between the energy storage unit and the terminal block based on the mode signal and the voltage of the terminal block.

[0009] Furthermore, the switching unit includes a first transistor, a first resistor, a first PMOS transistor, and a first diode; the base of the first transistor receives the mode signal, the emitter is grounded, and the collector is electrically connected to the first end of the first resistor; the second end of the first resistor is electrically connected to the first end of the switching unit; the gate (G) of the first PMOS transistor is electrically connected to the emitter of the first transistor, the source (S) is electrically connected to the second end of the energy storage unit, and the drain (D) is electrically connected to the terminal block; the anode of the first diode is electrically connected to the terminal block, and the cathode is electrically connected to the second end of the energy storage unit.

[0010] Furthermore, the residual power management unit includes a switching module and a boost module; the first end of the switching module is electrically connected to a terminal block, and the second end is electrically connected to the input end of the boost module. The control end receives a switching signal sent by the control unit, and connects the terminal block to the input end of the boost module when the voltage at the terminal block is less than the residual power charging voltage, otherwise disconnects it; the output end of the boost module is electrically connected to the second end of the energy storage unit, and boosts the voltage at the input end to the residual power charging voltage to charge the energy storage unit.

[0011] Preferably, the input terminal of the boost module is electrically connected to the second terminal of the switch module through a first inductor; the input terminal and output terminal of the boost module are electrically connected through a first Schottky diode.

[0012] Preferably, the residual power management unit further includes a residual power storage capacitor, which is electrically connected between the second terminal of the switching module and the ground terminal.

[0013] Preferably, the residual power management unit further includes a control unit power supply module; the control unit power supply module includes a second diode, a second resistor, a second Schottky diode, and a first capacitor; the positive terminal of the second diode is grounded, the two ends of the second resistor are electrically connected to the negative terminals of the second diode and the second Schottky diode, respectively, and the positive terminal of the second Schottky diode is electrically connected to the output terminal of the boost module; the first terminal of the first capacitor is grounded, and the second terminal is electrically connected to the negative terminal of the second diode and connected to the power supply terminal of the control unit, for providing 3.3V power to the control unit.

[0014] Preferably, the residual power management unit further includes a second capacitor connected between the negative terminal of the second diode and the ground terminal.

[0015] Optionally, the electric spool has a stator and a rotor arranged coaxially inside, and the stator and rotor are respectively provided with a magnetic core and multiple sets of electromagnetic coils that cooperate with each other; the terminals are electrically connected to each set of electromagnetic coils, and the drive circuit generates a current to drive the rotor based on the voltage at the terminals and generates an induced current through the rotation of the rotor.

[0016] Optionally, the control unit controls the acceleration torque and braking torque of the electric spool through a speed control signal.

[0017] Optionally, the signal includes a level trigger signal, a speed signal, an acceleration signal, an attitude signal, and the voltage at the terminal block.

[0018] A second aspect of this application also provides an electric spool, including a frame, a spool housed within the frame, and a handle for rotating the spool. The spool has a stator and a rotor that can rotate coaxially inside, the stator being fixedly disposed relative to the frame, and the rotor being fixedly connected to the inner wall of the spool.

[0019] The electric spool also includes a drive circuit and the aforementioned electric spool control system; the drive circuit is capable of rotating the rotor relative to the stator under current drive and generating induced current when the rotor rotates relative to the stator; the electric spool control system controls the acceleration and braking of the electric spool during the wire feeding and reeling process.

[0020] The electric spool control system provided in this application switches the drive circuit of the electric spool between acceleration and braking modes via a switching unit. During the initial line dragging stage of casting, it provides additional driving force to accelerate the rotation of the spool, thereby increasing the spool speed as quickly as possible to enter the matching stage while consuming as little forward kinetic energy as possible. This effectively increases the hook's entry distance into the water, and then uses spool braking to charge the energy storage unit as an energy source for the next acceleration. In addition, the residual power management unit increases the voltage at the terminals at the end of the braking process and during the retrieval process, enabling it to further charge the energy storage unit and avoiding the waste of electricity during braking and retrieval. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the appearance of an electric spool provided according to an embodiment of this application;

[0022] Figure 2 This is shown to illustrate the tension and relative velocity relationship between the spool and the fishing line at various stages of casting when using an existing electric spool control strategy.

[0023] Figure 3When using the electric spool control strategy of the embodiments of this application, the tension and relative speed relationship between the spool and the fishing line at each stage of casting;

[0024] Figure 4 This is a schematic diagram of the architecture of the electric spool control system according to an embodiment of this application;

[0025] Figure 5 This is a schematic diagram illustrating the implementation principle of the control unit according to an embodiment of this application;

[0026] Figure 6 This is a schematic diagram illustrating the cooperation between the switching unit and the energy storage unit according to an embodiment of this application;

[0027] Figure 7 This is a circuit schematic diagram of the switching unit according to an embodiment of this application;

[0028] Figure 8 This is a circuit schematic diagram of a residual power management unit according to an embodiment of this application;

[0029] Figure 9 This is a circuit schematic diagram of the power supply module for the control unit according to an embodiment of this application;

[0030] Figure 10 This is a circuit connection diagram of the second capacitor according to an embodiment of this application. Detailed Implementation

[0031] The present application will be further described below based on preferred embodiments and with reference to the accompanying drawings. For ease of understanding, various components in the drawings have been enlarged or reduced, but this is not intended to limit the scope of protection of this application. Furthermore, in the description of the embodiments of this application, if terms such as "upper," "lower," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the embodiments of this application is in use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] In the description of this application, terms such as "first" and "second" are used to distinguish different units. However, these terms are not limited by the order of manufacture and should not be construed as indicating or implying relative importance. Their names may differ in the detailed description and claims of this application. Unless otherwise expressly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. Those skilled in the art will understand the specific meaning of the above terms in this application.

[0033] Figure 1 A schematic diagram of the appearance of the electric spool provided for some preferred embodiments of this application, such as... Figure 1 As shown, the electric spool includes a frame 10 fixed relative to the fishing rod, and a spool 20 housed within the frame 10. The spool 20 is rotatably connected to the frame 10, and its outer circumferential surface is used for winding fishing line. Furthermore, the electric spool includes a handle 30 capable of manually rotating the spool 20 in the forward (i.e., letting out line) or reverse (i.e., reeling in line) direction. The handle 30 can rotate at a specific speed ratio with the spool 20 via a set of cooperating gears. The gears also engage or disengage the handle 30 from the spool 20 via various clutch mechanisms known to those skilled in the art. In some embodiments, the electric spool achieves uniform winding of the fishing line via a reciprocating line guiding mechanism. The above structure and its operation are well known to those skilled in the art and will not be described in detail here.

[0034] Furthermore, the spool 20 is coaxially equipped with a magnetic core composed of permanent magnets and a coil assembly composed of multiple sets of electromagnetic coils (not shown in the figure), as well as a drive circuit electrically connected to the coil assembly. One of the magnetic cores or coil assemblies (e.g., the magnetic core) acts as the stator, fixed relative to the frame, while the other (e.g., the coil assembly) acts as the rotor, fixedly connected to the inner wall of the spool 20. When the spool 20 rotates relative to the frame 10, the electromagnetic coils generate an induced current by cutting the magnetic field produced by the magnetic core. At this time, the stator-rotor assembly acts as a generator, converting rotational kinetic energy into electrical energy and outputting it through the terminals of the drive circuit, thereby producing a braking effect. When the electromagnetic coils receive external current from the terminals of the drive circuit, the rotor drives the spool to rotate through electromagnetic induction. At this time, the stator-rotor assembly acts as a motor, converting the externally input electrical energy into the kinetic energy of the spool's rotation. Generally, whether the stator-rotor assembly is in a power generation state or a power consumption state depends on the comparison between the voltage at the terminals of the drive circuit and the induced voltage generated by the coil cutting the magnetic field. The technology of the stator-rotor and its drive circuit described above is known to those skilled in the art and will not be described in detail here.

[0035] Controlling the spool's acceleration or braking throughout the entire casting process, compared to the existing control strategy that only brakes the spool, is more conducive to increasing casting time and distance. The reasons are analyzed below.

[0036] Figure 2 This demonstrates the entire process of casting a line using a conventional electric spool with only braking function, such as... Figure 2 As shown, based on the tension and relative speed relationship between the spool and the fishing line during the casting process, the entire casting process can be divided into the fishing line dragging stage, the matching stage, the spool backlash stage, and the hook entering the water stage.

[0037] During the casting process, "line breakage" typically occurs in the latter half of the casting, during the spool recoil phase and the hook entry phase. During the spool recoil phase, the hook's forward speed gradually decreases from its peak until the hook enters the water, at which point its forward speed drops sharply. During this process, because the spool's moment of inertia is much greater than the momentum of the hook and line, its speed decrease is much less than the deceleration of the hook and line. Therefore, effective braking of the spool is necessary. This braking principle generally involves real-time monitoring of the line tension (obtainable from the spool's rotational acceleration) or the spool's rotational speed. A preset algorithm determines whether the spool recoil phase or the hook entry phase has begun. The electric spool's drive circuit controls the on / off state of multiple electromagnetic coils. At this point, the stator-rotor combination acts as a generator, converting the kinetic energy of the spool's rotation into electrical energy, thus achieving the braking effect on the spool.

[0038] The aforementioned braking of the spool can effectively reduce the occurrence of "line breakage." However, factors affecting the overall casting performance do not only occur in the latter half of the casting process, such as... Figure 2 As shown, in the initial stage of casting, the line is dragged during the initial stage of casting. Because the hook needs to move forward to gradually accelerate the spool, a large part of the kinetic energy of the hook when it is cast out is consumed in dragging the spool. This will cause a great loss of the energy that the hook has to be thrown forward, thus greatly shortening the final distance of the hook's entry point into the water.

[0039] Figure 3 This diagram illustrates the relationship between the spool and the fishing line at various stages of casting using an improved electric spool control strategy. Figure 3It can be seen that if additional driving force is provided to the spool during the initial line dragging phase of casting, this additional driving force can greatly reduce the dragging force of the line required to accelerate the spool. This allows the spool's rotation speed to be increased as quickly as possible to enter the matching phase while consuming as little forward kinetic energy as possible. Since most of the hook's kinetic energy is not consumed in driving the spool, the forward speed of the hook is much higher than when no additional driving force is provided. That is, the speed at which the spool and hook enter the matching state is greatly increased, and the duration of the matching state between the spool, hook, and line is greatly extended, thereby effectively increasing the hook's entry distance into the water.

[0040] Therefore, if the spool can be controlled more effectively based on the interaction between the spool and the fishing line at different stages of the casting process, so that it acts as a motor to accelerate the rotation of the spool in the initial stage of casting, and as a generator to consume the kinetic energy of the spool during the spool backlash and hook entry stages, the casting distance can be effectively increased while preventing line breakage.

[0041] In addition, since the spool itself is an accessory of the fishing rod, adding an extra power supply component for spool acceleration, such as a separate battery, may significantly increase the size and weight of the electric spool. At the same time, the electrical energy generated by the spool during braking and reeling cannot be effectively utilized. Therefore, while controlling the acceleration and braking of the spool, we should also consider using an integrated circuit structure to achieve efficient utilization of electrical energy as much as possible.

[0042] Based on the above considerations, this application proposes an electric spool control system for controlling the acceleration and braking of the electric spool during the line feeding and reeling processes. Figure 4 A schematic diagram of the architecture of the electric spool control system according to some preferred embodiments of this application is shown, such as... Figure 4 As shown, the electric spool control system includes a control unit, a switching unit, an energy storage unit, a residual power management unit, and a monitoring unit.

[0043] The monitoring unit monitors the status of the electric spool during the line feeding and reeling processes. The control unit selects the control mode of the electric spool based on the monitoring results of the monitoring unit and switches the charging and discharging mode of the energy storage unit's drive circuit for the electric spool through the switching unit. Specifically, the control modes include acceleration mode, braking mode, and reeling mode. The rotation direction of the electric spool in the reeling mode is opposite to that in the acceleration mode and braking mode.

[0044] The residual power management unit is electrically connected to the drive circuit of the electric spool through the terminal block. When the voltage at the terminal block is less than the preset residual power charging voltage, the energy storage unit is charged from the drive circuit.

[0045] In the embodiments of this application, each of the above-mentioned units and their peripheral circuits are placed on a circuit board, which can be fixedly installed in the frame of the electric spool and sealed.

[0046] The following detailed description of each unit is provided in conjunction with the accompanying drawings and specific embodiments.

[0047] In some specific embodiments of this application, the control unit can be implemented using various microprocessor (MCU) chips known to those skilled in the art. Figure 5 A schematic diagram of the implementation principle of the control unit is shown in a specific embodiment, such as... Figure 5 As shown, the core chip of the control unit is specifically an STM32L051X6 / 8, with an operating voltage of 3.3V. In some other embodiments, those skilled in the art can select a suitable MCU as the core chip of the control unit according to specific needs. Generally, an MCU chip has multiple I / O ports to realize signal input and output.

[0048] like Figure 5 As shown, the STM32L051X6 / 8 chip has multiple I / O ports to realize signal input and output. Among them, the output I / O ports M1 to M6 are electrically connected to the M1 to M6 terminals of the drive circuit, and the on and off of each electromagnetic coil is controlled by the PWM signal.

[0049] Furthermore, such as Figure 5 As shown, ports IO01 to IO05 are used to input the monitoring results obtained by the monitoring unit to the control unit. The control unit determines whether to charge or discharge the drive circuit based on the received detection results through the built-in program, and then outputs the corresponding mode signal to the switching unit.

[0050] The mode signal output by the control unit depends on the evaluation result of the judgment signal. In the embodiments of this application, the type of monitoring result can be diverse. For example, the rotational speed signal of the spool can be obtained by a counter set in the frame of the electric spool, or the frequency of the on and off of the electromagnetic coils can be detected by a detection circuit connected to each electromagnetic coil, thereby obtaining the rotational speed signal of the spool. Alternatively, by calculating the rate of change of rotational speed, the signal of the rotational acceleration of the spool can be obtained. Obviously, the rotational acceleration can be further converted into information such as the torque of the spool and the corresponding fishing line tension. Another example is that the attitude signal of the electric spool or fishing rod can be obtained by setting an accelerometer at a specific part of the electric spool or fishing rod. In addition, the judgment signal can also be obtained by using a combination of mechanical structure and circuit. For example, a mode switching button that can automatically pop up and a corresponding circuit can be set on the frame of the electric spool. When the user presses the mode switching button, its circuit is triggered and outputs a high-level signal (or a low-level signal) to the control unit. When the user removes his finger, the mode switching button automatically pops up, and its circuit outputs a low-level signal (or a high-level signal) to the control unit.

[0051] Furthermore, it was found that the induced electromotive force generated by the rotation of the spool during the casting and reeling process varies between 0V and 10V, and the level of the induced electromotive force is strongly correlated with the rotational speed of the spool. Therefore, in some preferred embodiments, the level of the induced electromotive force can also be used to determine the stage of casting and reeling, so as to determine the timing of mode switching.

[0052] Specifically, in some preferred embodiments of this application, the monitoring unit can monitor the voltage at the FA end. During the fishing line dragging phase, the drive circuit drives the spool to rotate faster, causing the voltage at the FA end to rise rapidly until it reaches a preset voltage value. At this point, the spool's rotation speed is considered sufficient to enter the matching state. The voltage at the FA end can then be continuously monitored, and the system can switch to braking mode in a timely manner to prevent the spool from prematurely entering the recoil phase due to continued acceleration. The voltage value used to determine the mode switching timing can be obtained by performing multiple casting tests on a specific spool and statistically analyzing the voltage at the FA end when the matching state is reached. Furthermore, the voltage signal at the FA end can be further combined with the aforementioned rotation speed signal, acceleration signal, etc., to make the determination of the mode switching timing more accurate.

[0053] After receiving the aforementioned judgment signals, the control unit evaluates the current stage of the fishing line casting using a pre-set evaluation program and outputs the corresponding mode signal. For example, when the judgment signal is a level trigger signal, if the control unit receives a level signal triggered by the user pressing the mode switch button, it will output a mode signal corresponding to the acceleration mode to the switching unit. When the mode switch button is released, the control unit will receive the opposite level signal and output a mode signal corresponding to the braking mode to the switching unit. Alternatively, the control unit can calculate the tension of the fishing line dragging the spool in real time using continuously received acceleration signals, determine the current stage of the fishing line casting based on the tension, and output the corresponding mode signal to the switching unit. Furthermore, the control unit can also evaluate the current stage of the fishing line casting based on the pose signal obtained from the acceleration sensor, and then output the corresponding mode signal to the switching unit.

[0054] like Figure 5 As shown, the above-mentioned mode signal is output to the switching unit through IO06. It is well known to those skilled in the art that the two states of the signal are transmitted through the IO port. For example, in some specific embodiments, the mode signal can be a high-level signal or a low-level signal. The high-level signal is used as the mode signal corresponding to the acceleration mode, and the low-level signal is used as the mode signal corresponding to the braking mode, or vice versa, the low-level signal is used as the mode signal corresponding to the acceleration mode, and the high-level signal is used as the mode signal corresponding to the braking mode.

[0055] Figure 6 This diagram illustrates the principle of switching between acceleration and braking modes in a preferred embodiment, where the switching unit and the energy storage unit work together. In this embodiment, as shown... Figure 6 As shown, the energy storage unit is a large-capacity capacitor. Its first terminal a1 is grounded, and its second terminal a1 is electrically connected to the first terminal b1 of the switching unit. The second terminal b2 of the switching unit is electrically connected to the FA terminal of the drive circuit. The control terminal c1 of the switching unit is used to receive the mode signal output by the control unit. According to the mode signal, the switching unit switches between charging mode and discharging mode. When the mode signal is acceleration mode, the switching unit enters charging mode, and the unidirectional circuit from terminal b1 to terminal b2 is turned on. Current can flow from terminal a2 of the large-capacity capacitor to terminal FA of the drive circuit to drive the spool to rotate faster. When the mode signal is braking mode, the switching unit enters discharging mode, and the unidirectional circuit from terminal b2 to terminal b1 is turned on. Current can flow from terminal FA of the drive circuit to terminal a2 of the large-capacity capacitor to charge the large-capacity capacitor.

[0056] Figure 7 The circuit schematic of a specific switching unit is shown, such as... Figure 7As shown, the switching unit is a circuit composed of multiple discrete components. Specifically, a unidirectional charging circuit is formed from the FA terminal through the first diode D7 to the positive terminal of the energy storage unit (i.e., the large-capacity capacitor C3-5 in the figure), and a unidirectional discharging circuit is formed from the positive terminal of the large-capacity capacitor C3-5 through the first PMOS transistor Q5 to the FA terminal. The source and drain of the first PMOS transistor Q5 are connected to the positive terminal of the large-capacity capacitor C3-5 and the FA terminal, respectively. The mode signal is transmitted through the IO06 port to the base of the NPN type first transistor Q4. Its collector is connected to the gate of the first PMOS transistor Q5 and connected to the positive terminal of the large-capacity capacitor C3-5 through the first resistor R40. Its emitter is grounded. In addition, a resistor R41 is connected in series between the base and emitter of the first transistor Q4. The mode signal input through port IO06 can control the switching of the first transistor Q4 between the on and off states, further controlling the switching of the gate level of the first PMOS transistor Q4, and switching the unidirectional discharge circuit between on and off states. It should be understood that... Figure 7 The embodiments shown are merely illustrative of specific implementations of the switching unit switching between charging and discharging modes based on mode signals, and do not constitute a limitation of this application. Those skilled in the art can choose other discrete components or control chips to implement the switching unit based on the same technical concept.

[0057] Using the aforementioned large-capacity capacitors and switching units, such as Figure 3 As shown, during the initial line dragging phase of casting, the capacitor discharges to provide additional driving force to the spool. After the hook begins to decelerate, the spool's braking charges the large-capacity capacitor. Once fully charged, the large-capacity capacitor can again provide driving force to the spool during the next line dragging phase. This control mechanism effectively converts the energy generated by the spool's braking in the later stages of casting into energy to drive the spool in the early stages of the next casting. It eliminates the need for an additional power supply and enables fine-grained control throughout the entire casting process, significantly extending the time for the spool and line to match. This effectively increases the casting distance while preventing line breakage.

[0058] It should be noted that in the embodiments of this application, the switching unit being in acceleration mode or braking mode does not necessarily mean that the switching unit will control the energy storage unit to discharge from the drive circuit or charge from the drive circuit. Its charging and discharging are also affected by the voltage at the positive terminal of the large-capacity capacitor and the voltage at the FA terminal. For example, after the line is cast, the spool is in a stationary state. At this time, even if the switching unit is in braking mode, since the electromagnetic coil does not cut the magnetic field to generate an induced current, the FA terminal cannot charge the large-capacity capacitor C3-5 through the first diode D7.

[0059] As mentioned above, while the energy storage unit can be charged during the braking process of the spool, the voltage at terminal FA gradually decreases as the spool's rotation speed decreases. When the voltage drops to a level that prevents the first diode D7 from conducting, the charging process ends, even though the energy storage unit is still in charging mode. To ensure that the electrical energy generated at lower spool rotation speeds can also be utilized, the voltage at terminal FA can be boosted when it is low, so that the electrical energy generated at the end of braking can also be effectively utilized.

[0060] Furthermore, after completing a fishing trip, the spool needs to be rotated in the opposite direction by turning the handle to retrieve the line. In the embodiments of this application, the above mode is called the retrieving mode. In this mode, since the spool is driven by human power to rotate, an induced voltage will also be generated at the FA terminal. After measurement, the induced voltage at the FA terminal is generally less than 5V when retrieving the line. In order to ensure the charging effect of the energy storage unit, it is generally necessary to boost the voltage.

[0061] In this application, the full charging of the energy storage unit in the end of the braking mode and the take-up mode is carried out by the residual power management unit. Obviously, in the take-up mode, the switching unit can be in the same state as the braking mode. That is, the control unit does not provide a separate mode signal for the take-up mode, but outputs the same mode signal as the braking mode to the switching unit in this mode.

[0062] Figure 8 The circuit schematic of the residual power management unit is shown in some preferred embodiments, such as... Figure 8 As shown, the core components of the residual power management unit are the second PMOS transistor Q11 (i.e., the switching module) and the chip U9 (i.e., the boost module). The first terminal (S pole) of the second PMOS transistor Q11 is electrically connected to the FA terminal, and the second terminal (D pole) is electrically connected to the Lx terminal (i.e., the input terminal) of the chip U9. The control terminal (G pole) receives the switching signal sent by the control unit. At the same time, a resistor R14 is connected in series between its S pole and G pole. The VSS terminal of the chip U9 is grounded, and the Vout terminal (i.e., the output terminal) is electrically connected to the second terminal of the energy storage unit. The voltage at the Lx terminal (i.e., the input terminal) is boosted to the residual power charging voltage and then charged to the energy storage unit.

[0063] The control unit judges the voltage at the FA terminal monitored by the monitoring unit. When the voltage at the FA terminal is less than the residual charge voltage, the switch signal turns the S and D terminals together. At this time, the voltage at the FA terminal is boosted to the residual charge voltage by the chip U9 and then charges the large-capacity capacitor C3-5, thus making full use of the low-voltage current at the end of the line casting and during the manual line retrieval process. When the voltage at the FA terminal is greater than the residual charge voltage, either the voltage of the large-capacity capacitor C3-5 is high and it is in the initial stage of discharging the spool, or the spool has reached a high speed and can directly charge the large-capacity capacitor C3-5 through braking. Therefore, it is not necessary to boost the voltage through the residual charge management unit.

[0064] As mentioned above, the induced voltage at the FA terminal is generally less than 5V when the wire is retracted. Therefore, in some preferred embodiments, the residual power charging voltage is set to 5V, thereby ensuring that the residual power management unit only performs boost operation when the voltage at the FA terminal is less than 5V.

[0065] In some preferred embodiments, such as Figure 8 As shown, a first inductor L3 is connected between the Lx terminal of chip U9 and the drain of the second PMOS transistor. In addition, a first Schottky diode U10 is connected between the Lx terminal and the Vout terminal of chip U9 to perform rectification.

[0066] In some preferred embodiments, the residual power management unit further includes a residual power storage capacitor C10, which is connected between the drain (D) terminal of the first PMOS transistor Q11 and the ground terminal. After the source (S) and drain (D) terminals of the first PMOS transistor Q11 are disconnected, the stored power can be used to continue charging the large-capacity capacitors C3-5.

[0067] In the embodiments of this application, the control unit receives a 3.3V power supply for normal operation. Since the residual power management unit can boost the residual power at the end of braking control and during the winding process to 5V, the boosted power can be further used to power the control unit, thus avoiding the increase in spool size and manufacturing cost caused by setting up an additional power supply module. Therefore, in some preferred embodiments, the residual power management unit also includes a control unit power supply module. Figure 9 A detailed circuit diagram of a control unit power supply module is shown, such as... Figure 9 As shown, the power supply module of the control unit includes a second diode D8, a second resistor R11, a second Schottky diode U4, and a first capacitor C5.

[0068] Specifically, the positive terminal of the second diode D8 is grounded, the two ends of the second resistor R11 are electrically connected to the negative terminals of the second diode D8 and the second Schottky diode U4, respectively, and the positive terminal of the second Schottky diode U4 is electrically connected to the output terminal of the chip U9; the first terminal of the first capacitor C5 is grounded, and the second terminal is electrically connected to the negative terminal of the second diode D8 and connected to the power supply terminal of the control unit to provide 3.3V power to the control unit.

[0069] Furthermore, in some preferred embodiments, such as Figure 10 As shown, the residual power management unit also includes a second capacitor C4, which is connected between the negative terminal of the second diode D8 and the ground terminal. This capacitor can be used as a power storage element. When the output terminal of the chip U9 has a voltage of 5V, it stores power and continuously supplies power to the power supply unit when the spool is stationary (for example, after casting the line or when it is stationary after retrieving the line).

[0070] The specific embodiments of this application have been described in detail above. For those skilled in the art, several improvements and modifications can be made to this application without departing from the principle of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. An electric spool control system for controlling the acceleration, braking, and reel-in stroke of the electric spool, wherein the electric spool is used to wind fishing line, characterized in that: It includes a control unit, a switching unit, an energy storage unit, a residual power management unit, and a monitoring unit; The monitoring unit monitors the status of the electric spool during the line feeding and reeling processes; The control unit selects the control mode of the electric spool according to the monitoring results of the monitoring unit and switches the charging and discharging mode of the energy storage unit to the drive circuit of the electric spool through the switching unit. The control mode includes acceleration mode, braking mode and reeling mode. The rotation direction of the electric spool in the reeling mode is opposite to the rotation direction in the acceleration mode and braking mode. The residual power management unit is electrically connected to the drive circuit of the electric spool through a terminal block. When the voltage at the terminal block is less than the preset residual power charging voltage, the energy storage unit is charged from the drive circuit. The first end of the energy storage unit is grounded; The first end of the switching unit is electrically connected to the second end of the energy storage unit, and the second end is electrically connected to the terminal block. The control end receives the mode signal sent by the control unit and controls the current direction between the energy storage unit and the terminal block based on the mode signal and the voltage of the terminal block. A unidirectional charging circuit and a unidirectional discharging circuit are connected between the first end and the second end of the switching unit. The residual power management unit includes a switching module and a boost module. The first end of the switching module is electrically connected to a terminal block, and the second end is electrically connected to the input end of the boost module. The control end receives a switching signal sent by the control unit. When the voltage at the terminal block is less than the residual power charging voltage, the terminal block is connected to the input end of the boost module; otherwise, the connection is broken. The output end of the boost module is electrically connected to the second end of the energy storage unit. The boost module boosts the voltage at the input end to the residual power charging voltage and then charges the energy storage unit.

2. The electric spool control system according to claim 1, characterized in that, The switching unit includes a first transistor, a first resistor, a first PMOS transistor, and a first diode; The base of the first transistor receives the mode signal, the emitter is grounded, and the collector is electrically connected to the first end of the first resistor; The second end of the first resistor is electrically connected to the first end of the switching unit; The gate (G) of the first PMOS transistor is electrically connected to the emitter of the first transistor, the source (S) is electrically connected to the second terminal of the energy storage unit, and the drain (D) is electrically connected to the terminal block. The positive terminal of the first diode is electrically connected to the terminal block, and the negative terminal is electrically connected to the second terminal of the energy storage unit.

3. The electric spool control system according to claim 1, characterized in that: The input terminal of the boost module is electrically connected to the second terminal of the switching module through a first inductor; The input and output terminals of the boost module are electrically connected via a first Schottky diode.

4. The electric spool control system according to claim 1, characterized in that: The residual power management unit also includes a residual power storage capacitor, which is electrically connected between the second terminal of the switching module and the ground terminal.

5. The electric spool control system according to claim 1, characterized in that: The residual power management unit also includes a control unit power supply module; The power supply module of the control unit includes a second diode, a second resistor, a second Schottky diode, and a first capacitor; The positive terminal of the second diode is grounded, and the two ends of the second resistor are electrically connected to the negative terminals of the second diode and the second Schottky diode, respectively. The positive terminal of the second Schottky diode is electrically connected to the output terminal of the boost module. The first terminal of the first capacitor is grounded, and the second terminal is electrically connected to the negative terminal of the second diode and connected to the power supply terminal of the control unit to provide 3.3V power to the control unit.

6. The electric spool control system according to claim 5, characterized in that: The residual power management unit also includes a second capacitor connected between the negative terminal of the second diode and the ground terminal.

7. The electric spool control system according to claim 1, characterized in that: The electric spool has a stator and a rotor arranged coaxially inside, and the stator and rotor are respectively provided with a magnetic core and multiple sets of electromagnetic coils that cooperate with each other; The terminals are electrically connected to each group of electromagnetic coils. The drive circuit generates a current to drive the rotor based on the voltage at the terminals and generates an induced current through the rotation of the rotor.

8. The electric spool control system according to claim 1, characterized in that: The control unit controls the acceleration torque and braking torque of the electric spool through a speed control signal.

9. The electric spool control system according to claim 1, characterized in that, The monitoring results include at least one of the following data: Level trigger signal, speed signal, acceleration signal, attitude signal, and voltage at the terminal block.

10. An electric spool, comprising a frame, a spool housed within the frame, and a handle for rotating the spool, wherein the spool contains a stator and a rotor that can rotate coaxially, the stator being fixedly disposed relative to the frame, and the rotor being fixedly connected to the inner wall of the spool, characterized in that: It also includes a drive circuit and an electric spool control system as described in claim 1; The drive circuit is capable of rotating the rotor relative to the stator under current drive and generating induced current when the rotor rotates relative to the stator. The electric spool control system controls the acceleration and braking of the electric spool during the line feeding and reeling processes.

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