Start-stop control system of powered surfboard

Abstract

The utility model relates to the technical field of switch control, in particular to a start-stop control system of a jet powered surfboard, which comprises an accelerator switch detection circuit, a drainage switch detection circuit and a controller, and is characterized in that the accelerator switch detection circuit comprises an accelerator switch K1, a first voltage stabilizing diode D2, a second voltage stabilizing diode D3, a first triode Q2 and a first field effect transistor Q1; one end of the accelerator switch K1 is grounded, and the other end of the accelerator switch K1 is connected with the first voltage stabilizing diode D2 and is connected with the base electrode of the first triode Q2 through the second voltage stabilizing diode D3; the base electrode of the first triode Q2 is connected with a controller detection port PD4 through a current-limiting resistor R11, the collector electrode of the first triode Q2 is connected to the grid electrode of the first field effect transistor Q1, and the emitter electrode of the first triode Q2 is grounded; the source electrode of the first field effect transistor Q1 is connected with a 12V power supply, and the drain electrode is output to a system power supply module. Activation, delayed starting and power supply management of the system are achieved through single control of the accelerator switch, the operation process is simplified, and user experience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to switch control technical field, more specifically, relate to a power surfboard's start -stop control system. BACKGROUND

[0002] Because power surfboard works long -term on water, cause the waterproofness of electric control system is especially important. Including throttle handle, plug etc. Especially in seawater play, as long as waterproof does not reach the point maintenance not good, the next day immediately rust, plug corrosion various etc. Throttle handle as surfboard's steering wheel and circuit control, design and waterproof are more important. First, control switch and connecting line want to do to seal waterproof, second is connected to the waterproof performance requirement of plug of controller.

[0003] There is a kind of control system on market, a mechanical switch is installed on handle, key switch is powered on, hand presses and starts mechanical switch, and pops up after starting. After removing the key, the engine is extinguished. Advantage is that it can be started at any time, disadvantage is that an additional switch is added, and fault point is increased, including waterproof various etc. Secondly, user needs to press and start switch after boarding, it is not very convenient. Another control mode is that Hall induction switch is installed on handle, and it is in standby state, key insertion is detected after delay for several seconds, and the engine is started, and the engine is extinguished after removing the key. Advantage is that it is convenient and simple to operate, disadvantage is that control system is in standby state for a long time, and battery needs to be charged after about a month, and user is very inconvenient. Many customers appear because of not charging, and battery is depleted, and battery is damaged when battery is depleted, and the service life of battery is affected, and the battery is directly scrapped, and new battery needs to be replaced. SUMMARY

[0004] The utility model discloses a power surfboard's start -stop control system and system to solve the problems in the prior art.

[0005] In order to solve the above problem, the utility model discloses a power surfboard's start -stop control system adopts the following technical scheme:

[0006] A power surfboard's start -stop control system, including throttle switch detection circuit, drain switch detection circuit and controller, wherein:

[0007] The throttle switch detection circuit includes throttle switch K1, first stabilivolt diode D2, second stabilivolt diode D3, first triode Q2 and first field effect tube Q1;

[0008] One end of throttle switch K1 is grounded, the other end is connected with first stabilivolt diode D2, and is connected with the base of first triode Q2 through second stabilivolt diode D3;

[0009] The base of the first triode Q2 is connected with the controller detection port PD4 through the current-limiting resistor R11, the collector is connected with the gate of the first field effect tube Q1, and the emitter is grounded.

[0010] The source of the first field effect tube Q1 is connected with a 12V power supply, and the drain is output to a system power supply module.

[0011] Preferably, the accelerator switch detection circuit further comprises a pull-up resistor R1 and a first voltage dividing resistor R7, the pull-up resistor R1 is used to pull up the gate potential of the first field effect tube Q1, and the first voltage dividing resistor R7 is used to realize voltage division.

[0012] Preferably, the accelerator switch detection circuit further comprises a first operational amplifier U1A, a second voltage dividing resistor R3, a third voltage dividing resistor R4, a current-limiting resistor R8 and a first filter capacitor C1.

[0013] The non-inverting input terminal of the first operational amplifier U1A is connected with the accelerator switch K1 through the second voltage dividing resistor R3 and the third voltage dividing resistor R4.

[0014] The inverting input terminal of the first operational amplifier U1A is grounded through the fourth voltage dividing resistor R12, and a reference voltage is set.

[0015] The output terminal of the first operational amplifier U1A is grounded through the current-limiting resistor R8 and the first filter capacitor C1, and outputs a signal to the first controller port PB4.

[0016] The power supply pin of the first operational amplifier U1A is connected with a 5V power supply, and the ground wire is connected with GND.

[0017] Preferably, the drain switch detection circuit comprises a drain switch K2, a second voltage stabilizing diode D4, an operational amplifier U2A, a fifth voltage dividing resistor R5, a grounding resistor R9 and a second filter capacitor C4.

[0018] One end of the drain switch K2 is grounded, and the other end is connected with the non-inverting input terminal of the second operational amplifier U2A through the voltage stabilizing diode D4.

[0019] The inverting input terminal of the second operational amplifier U2A is connected with the grounding resistor R9 through the fifth voltage dividing resistor R5, and a reference voltage is set.

[0020] The output terminal of the second operational amplifier U2A is grounded through the grounding resistor R9 and the second filter capacitor C4, and outputs a drain control signal to the second controller port PB5.

[0021] The power supply pin of the second operational amplifier U2A is connected with a 5V power supply, and the ground wire is connected with GND.

[0022] The beneficial effects of this utility model are as follows: Multiple functions such as system activation, start-up, and delay control are achieved through a single switch on the throttle handle, replacing the traditional design that requires two switches on the throttle handle. Operation is simpler and more convenient; users only need to insert and remove the key to complete all start-stop controls. Through an independent drain switch, this solution effectively solves the problem of safe drainage after water enters the engine. During drainage, the system automatically disconnects the ignition power supply, avoiding the fire risk caused by the ignition working during drainage, allowing users to safely operate the drainage function, protecting the engine and improving system safety. Unlike traditional Hall effect sensors, this solution features one-button start control and automatic power-off function. If the user removes the key and there is no operation within 4 minutes, the system automatically cuts off the power supply and enters standby mode. This function significantly reduces the system's standby energy consumption, eliminating the need for frequent power replenishment during long standby periods, achieving a more advanced, energy-efficient, and convenient design. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below:

[0024] Figure 1 This is a structural diagram of the throttle switch detection circuit of the start-stop control system of the power surfboard according to a preferred embodiment of the present invention.

[0025] Figure 2 This is a structural diagram of the drain switch detection circuit of the start-stop control system of the powered surfboard according to a preferred embodiment of the present invention. Detailed Implementation

[0026] To make the technical objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model; that is, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] The start-stop control system of the powered surfboard in the preferred embodiment of this utility model is as follows: Figure 1 As shown, see reference Figure 2 This includes a throttle switch detection circuit, a drain switch detection circuit, and a controller.

[0028] The throttle switch detection circuit includes a throttle switch K1, a first Zener diode D2, a second Zener diode D3, a first transistor Q2, and a first field-effect transistor Q1;

[0029] One end of the throttle switch K1 is grounded, and the other end is connected to the first Zener diode D2, and is connected to the base of the first transistor Q2 through the second Zener diode D3;

[0030] The base of the first transistor Q2 is connected to the controller detection port PD4 through the current limiting resistor R11, the collector is connected to the gate of the first field-effect transistor Q1, and the emitter is grounded.

[0031] The source of the first field-effect transistor Q1 is connected to a 12V power supply, and the drain output is connected to the system power supply module.

[0032] The throttle switch detection circuit also includes a pull-up resistor R1 and a first voltage divider resistor R7. The pull-up resistor R1 is used to pull up the gate potential of the first field-effect transistor Q1, and the first voltage divider resistor R7 is used to achieve voltage division.

[0033] When the throttle switch K1 is closed, the Zener diodes D2 and D3 transmit the signal voltage to the base of Q2, causing Q2 to conduct;

[0034] After Q2 is turned on, its collector voltage decreases, which pulls down the gate voltage of Q1, causing Q1 to turn on.

[0035] After Q1 is turned on, the 12V power supply is output to the system power supply module, activating the system.

[0036] The pull-up resistor R1 and the first voltage divider resistor R7 ensure that the gate voltage of Q1 is stable in the switching state and is not easily affected by interference.

[0037] The circuit is protected by a Zener diode to ensure that the system can still work normally when the electrical insulation of the reed switch weakens or the control line is submerged in seawater.

[0038] The current-limiting resistor R11 protects the input of transistor Q2, ensuring stable transmission of system signals.

[0039] The field-effect transistor Q1 enables power supply control, and the pull-up resistor R1 and the voltage divider resistor R7 ensure stable voltage distribution and reliable system operation.

[0040] like Figure 1 As shown, the throttle switch detection circuit also includes a first operational amplifier U1A, a second voltage divider resistor R3, a third voltage divider resistor R4, a current limiting resistor R8, and a first filter capacitor C1.

[0041] The non-inverting input of the first operational amplifier U1A is connected to the throttle switch K1 through the second voltage divider resistor R3 and the third voltage divider resistor R4;

[0042] The inverting input of the first operational amplifier U1A is grounded through the fourth voltage divider resistor R12 to set the reference voltage;

[0043] The output of the first operational amplifier U1A is grounded through the current-limiting resistor R8 and the first filter capacitor C1, and outputs a signal to the first controller port PB4.

[0044] When the throttle switch K1 is closed, the input signal is applied to the non-inverting input terminal of U1A through the second voltage divider resistor R3 and the third voltage divider resistor R4;

[0045] The reference voltage at the inverting input is set by R12;

[0046] Operational amplifier U1A compares the input signal with the reference voltage and outputs the amplified and stable signal to the first controller port PB4 through the current-limiting resistor R8 and the first filter capacitor C1 for the controller to detect and analyze.

[0047] The power supply pin of the first operational amplifier U1A is connected to a 5V power supply, and the ground wire is connected to GND.

[0048] The controller uses a throttle switch detection circuit to implement a 3-second wait and a 3.5-second start motor operation after the second key insertion / removal. The controller output signal triggers the start motor through the circuit module, ensuring safe starting after the user has completed preparation. While the start motor is operating, the controller monitors the current in real time, setting a starting current protection threshold of 80A. If an abnormal increase in the motor starting current is detected (such as a sharp rise in current due to water entering the engine), the system automatically stops the starting operation, protecting the start motor and starting mechanism from damage.

[0049] Water pump operating logic: Upon detecting the key insertion, the controller activates the water pump and begins pumping water. The controller sets the water pump operating cycle, checking the pump status every 20 seconds: if there is no water for more than 3 seconds, the pump automatically stops; if pumping is detected as normal, the pump continues to operate for 10 seconds. The user can reset the water pump operating cycle by reinserting the key.

[0050] like Figure 2 As shown, the drainage switch detection circuit includes: drainage switch K2, second Zener diode D4, operational amplifier U2A, fifth voltage divider resistor R5, grounding resistor R9, and second filter capacitor C4.

[0051] One end of the drain switch K2 is grounded, and the other end is connected to the non-inverting input of the second operational amplifier U2A through the Zener diode D4;

[0052] The inverting input of the second operational amplifier U2A is set with a reference voltage through the fifth voltage divider resistor R5 and the grounding resistor R9;

[0053] The output of the second operational amplifier U2A is grounded through the grounding resistor R9 and the second filter capacitor C4, and outputs a drainage control signal to the second controller port PB5;

[0054] The power supply pin of the second operational amplifier U2A is connected to a 5V power supply, and the ground line is connected to GND.

[0055] When the drain switch K2 is closed, the input voltage is transmitted to the non-inverting input terminal of U2A through the Zener diode D4;

[0056] The inverting input of operational amplifier U2A is set with a reference voltage via R5 and R;

[0057] The operational amplifier U2A outputs a drainage control signal to the second controller port PB5 to control the start of the drainage motor. At the same time, it can disconnect the power supply to the igniter to ensure drainage safety.

[0058] The second filter capacitor C4 eliminates signal jitter and ensures a stable output signal.

[0059] The status of the drain switch is indicated by an indicator light:

[0060] Flashing red light: Low voltage alarm;

[0061] A solid green light indicates that the motor is running normally.

[0062] Flashing green light: Motor overcurrent protection during startup;

[0063] A solid blue light indicates that the igniter is powered normally.

[0064] Blue light flashing: Injector control signal is normal.

[0065] System Workflow Summary

[0066] First key insertion: activates the system, powers the igniter, and starts the water pump.

[0067] Second key insertion / removal: After a 3-second wait, the system starts the motor and continues running for 3.5 seconds.

[0068] Automatic water pump detection: The pumping status is checked every 20 seconds. If there is no water, it will automatically stop after 3 seconds of operation. If the pumping is normal, it will continue to operate for 10 seconds.

[0069] Drainage protection: Triggering the drain switch starts the motor and disconnects the igniter power supply, ensuring safe drainage.

[0070] Status indication: The system status is reflected by indicator lights, including undervoltage, starter motor overcurrent protection, power supply and fuel injector working status.

[0071] Automatic power-off: If there is no operation for 4 minutes after the user removes the key, the system will automatically power off to save energy.

[0072] Therefore, this embodiment realizes the start-stop control function of the power surfboard through the throttle switch detection circuit.

[0073] The operational amplifier amplifies, compares, and filters the input signals in the throttle handle signal detection circuit and the drain switch detection circuit, and outputs a stable signal for the controller to detect.

[0074] The drainage switch detection circuit uses an operational amplifier to control the drainage motor and ensure safety during the drainage process.

[0075] The system is activated the first time the key is inserted by the user. The second insertion or removal of the key triggers a delayed start, and the motor starts automatically after 3 seconds, simplifying the operation process and improving the user experience.

[0076] This solution utilizes a single switch on the throttle lever to achieve multiple functions such as system activation, start-up, and delay control, replacing the traditional design that requires two switches on the throttle lever. Operation is simpler and more convenient; users only need to insert and remove the key to complete all start-stop controls. Through an independent drain switch, this solution effectively solves the problem of safe drainage after water enters the engine. During drainage, the system automatically disconnects the ignition power supply, avoiding the fire risk caused by ignition activation during drainage, allowing users to safely operate the drainage function, protecting the engine and improving system safety. Unlike traditional Hall effect sensors, this solution features one-button start control and automatic power-off. If the user removes the key and there is no operation within 4 minutes, the system automatically cuts off the power supply and enters standby mode. This function significantly reduces the system's standby energy consumption, eliminating the need for frequent recharging during long standby periods, achieving a more advanced, energy-efficient, and convenient design. The water pump automatically detects and operates based on the system status, designed to check the pumping status every 20 seconds, stopping after 3 seconds of operation when there is no water, and continuously operating for 10 seconds during normal pumping, ensuring efficient drainage while preventing damage from dry running. The drain switch controls the motor's operation while simultaneously disconnecting the ignition power supply to prevent fire risks during drainage. The drain switch detection circuit is simple in design, safe to operate, and protects the engine while ensuring user safety. The circuit design employs a modular structure, including a throttle switch detection circuit, a drain switch detection circuit, and a controller; the logic is clear, making it easy to implement and maintain. The system is specifically designed for powered surfboards, offering high waterproofing and stable operation in seawater and humid environments, meeting the needs of long-term waterborne operation for powered surfboards.

[0077] This implementation achieves one-button start / stop control and safety protection for the powered surfboard through the coordinated control of the throttle switch detection circuit, the drain switch detection circuit, and the controller, combined with functions such as starting current protection, automatic water pump control, and automatic system power-off. It has the advantages of simple structure, stable operation, and adaptability to complex environments.

[0078] Finally, it should be noted that the above embodiments are only for illustration and not for limiting the technical solutions of this utility model. Any equivalent substitutions and modifications or partial substitutions that do not depart from the spirit and scope of this utility model should be covered within the scope of protection of the claims of this utility model.

Claims

1. A start-stop control system for a powered surfboard, characterized in that, It includes a throttle switch detection circuit, a drain switch detection circuit, and a controller, wherein: The throttle switch detection circuit includes a throttle switch (K1), a first Zener diode (D2), a second Zener diode (D3), a first transistor (Q2), and a first field-effect transistor (Q1). One end of the throttle switch (K1) is grounded, and the other end is connected to the first Zener diode (D2), and is connected to the base of the first transistor (Q2) through the second Zener diode (D3); The base of the first transistor (Q2) is connected to the controller detection port (PD4) through a current-limiting resistor (R11), the collector is connected to the gate of the first field-effect transistor (Q1), and the emitter is grounded; The source of the first field-effect transistor (Q1) is connected to a 12V power supply, and the drain is output to the system power supply module.

2. The start-stop control system for the powered surfboard according to claim 1, characterized in that, The throttle switch detection circuit also includes a pull-up resistor (R1) and a first voltage divider resistor (R7). The pull-up resistor (R1) is used to pull up the gate potential of the first field-effect transistor (Q1), and the first voltage divider resistor (R7) is used to achieve voltage division.

3. The start-stop control system for the powered surfboard according to claim 1, characterized in that, The throttle switch detection circuit also includes a first operational amplifier (U1A), a second voltage divider resistor (R3), a third voltage divider resistor (R4), a current limiting resistor (R8), and a first filter capacitor (C1). The non-inverting input of the first operational amplifier (U1A) is connected to the throttle switch (K1) through the second voltage divider resistor (R3) and the third voltage divider resistor (R4). The inverting input of the first operational amplifier (U1A) is grounded through the fourth voltage divider resistor (R12) to set the reference voltage; The output of the first operational amplifier (U1A) is grounded through the current-limiting resistor (R8) and the first filter capacitor (C1), and outputs a signal to the first controller port (PB4). The power supply pin of the first operational amplifier (U1A) is connected to a 5V power supply, and the ground wire is connected to GND.

4. The start-stop control system for the powered surfboard according to claim 1, characterized in that, The drain switch detection circuit includes: a drain switch (K2), a second Zener diode (D4), an operational amplifier (U2A), a fifth voltage divider resistor (R5), a grounding resistor (R9), and a second filter capacitor (C4). One end of the drain switch (K2) is grounded, and the other end is connected to the non-inverting input of the second operational amplifier (U2A) through a Zener diode (D4); The inverting input of the second operational amplifier (U2A) is set with a reference voltage through the fifth voltage divider resistor (R5) and the ground resistor (R9); The output of the second operational amplifier (U2A) is grounded through the grounding resistor (R9) and the second filter capacitor (C4), and outputs a drainage control signal to the second controller port (PB5). The power supply pin of the second operational amplifier (U2A) is connected to a 5V power supply, and the ground wire is connected to GND.

Images