Anti-locked-rotor circuit and golf serving device

Abstract

The utility model discloses an anti-locked-rotor circuit and a golf serving device, and relates to the technical field of sports equipment, the anti-locked-rotor circuit comprises a motor driving circuit, a current detection circuit and a control circuit, the motor driving circuit is electrically connected with a motor, the current detection circuit is electrically connected with the motor driving circuit, and the control circuit is electrically connected with the current detection circuit. The control circuit is electrically connected with the current detection circuit and the motor driving circuit, the current of the motor driving circuit is detected through the current detection circuit, and a corresponding current detection signal is generated and output to the control circuit; and controlling the motor driving circuit to drive the motor to rotate in a direction opposite to the current rotating direction, so as to dredge golf balls or other foreign matters in the golf serving device, recover normal work of the golf serving device and prevent the motor from being damaged due to continuous locked-rotor.

Description

Technical Field

[0001] This utility model relates to the field of sports equipment technology, and in particular to an anti-blocking circuit and a golf ball-launching device. Background Technology

[0002] In golf training and competition, golf tee machines are widely used to automatically feed golf balls, allowing players to practice continuously or conduct match tests. A golf tee machine typically contains a motor responsible for pushing the golf ball. However, in actual use, a golf ball may get stuck or other foreign objects may interfere with the motor's normal operation, causing it to stall. This not only prevents the golf tee machine from functioning properly, but also, if power is continued while the motor is stalled, it may overheat and damage the motor, potentially even posing a safety hazard. Utility Model Content

[0003] The main purpose of this invention is to propose an anti-stalling circuit and a golf ball-launching device, which aims to prevent the motor of the golf ball-launching device from stalling.

[0004] To achieve the above objectives, the present invention proposes an anti-stall circuit, which is applied to a golf teeing device. The golf teeing device includes a motor, and the anti-stall circuit includes:

[0005] A motor drive circuit, electrically connected to the motor, is used to drive the motor to rotate forward or in reverse.

[0006] A current detection circuit, electrically connected to the motor drive circuit, is used to detect the current of the motor drive circuit and generate a corresponding current detection signal.

[0007] The control circuit is electrically connected to both the current detection circuit and the motor drive circuit, and is used to control the motor drive circuit to drive the motor to rotate in the opposite direction of the current rotation direction when the motor is determined to be stalled based on the current detection signal.

[0008] In one embodiment, the current detection circuit includes:

[0009] A current sampling circuit, the input terminal of which is connected to the motor drive circuit, is used to sample the current of the motor drive circuit and output a corresponding sampling signal.

[0010] An amplifier circuit is provided, wherein the input terminal of the amplifier circuit is connected to the output terminal of the current sampling circuit, and the output terminal of the amplifier circuit is electrically connected to the control circuit; the amplifier circuit is used to amplify the sampling signal and output a corresponding current detection signal.

[0011] In one embodiment, the current sampling circuit includes a sampling resistor, the first end of which is electrically connected to the motor drive circuit and the amplifier circuit, and the second end of which is grounded.

[0012] In one embodiment, the amplification circuit includes an amplifier, the non-inverting input of which is connected to the output of the current sampling circuit, the inverting input of which is connected to a feedback loop, and the output of which is electrically connected to the control circuit.

[0013] In one embodiment, the amplifier circuit further includes a first resistor and a second resistor, a first end of the first resistor being connected to the inverting input of the amplifier, a second end of the first resistor being grounded, a first end of the second resistor being connected to the inverting input of the amplifier, and a second end of the second resistor being connected to the output input of the amplifier.

[0014] In one embodiment, the current detection circuit further includes a filter circuit, a first terminal of which is electrically connected to the current sampling circuit, and a second terminal of which is electrically connected to the amplification circuit.

[0015] In one embodiment, the current detection circuit further includes a clamping circuit, a first terminal of which is electrically connected to the output terminal of the amplifier circuit, and a second terminal of which is connected to the power supply.

[0016] In one embodiment, the motor drive circuit includes:

[0017] An isolation circuit, wherein a first terminal of the isolation circuit is electrically connected to the control circuit;

[0018] The H-bridge circuit is electrically connected to the second terminal of the isolation circuit; the H-bridge circuit is used to drive the motor to rotate forward or in reverse according to the control signal output by the control circuit; the isolation circuit is used to achieve electrical isolation between the control circuit and the H-bridge circuit.

[0019] In one embodiment, the isolation circuit includes an optocoupler, a first end of which is electrically connected to the control circuit, and a second end of which is electrically connected to the H-bridge circuit.

[0020] This utility model also proposes a golf ball-launching device, which includes:

[0021] A ball-handling turntable, wherein the circumference of the ball-handling turntable is provided with a plurality of grooves for placing golf balls;

[0022] The motor is connected to the serving turntable via a transmission.

[0023] And, the aforementioned anti-stall circuit.

[0024] The anti-stall circuit of this utility model includes a motor drive circuit, a current detection circuit, and a control circuit. The motor drive circuit is electrically connected to the motor, the current detection circuit is electrically connected to the motor drive circuit, and the control circuit is electrically connected to both the current detection circuit and the motor drive circuit. The current detection circuit detects the current in the motor drive circuit, generates a corresponding current detection signal, and outputs it to the control circuit. When the control circuit determines that the motor is stalled based on the current detection signal, it controls the motor drive circuit to drive the motor to rotate in the opposite direction of the current rotation direction to clear the golf ball or other foreign object in the golf teeing device, restore the normal operation of the golf teeing device, and prevent the motor from being damaged due to continuous stalling. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the circuit structure of an embodiment of the anti-stall circuit provided by this utility model;

[0027] Figure 2 A schematic diagram of the circuit structure of another embodiment of the anti-stall circuit provided by this utility model;

[0028] Figure 3 A schematic diagram of the circuit structure of another embodiment of the anti-stall circuit provided by this utility model;

[0029] Figure 4 This is a structural schematic diagram of an embodiment of the golf ball-tackling device provided by this utility model.

[0030] Explanation of icon numbers:

[0031] 10. Motor drive circuit; 20. Current detection circuit; 30. Control circuit; 40. Motor; 21. Current sampling circuit; 22. Amplifier circuit; U16A. Amplifier; R40. First resistor; R36. Second resistor; 23. Filter circuit; 24. Clamping circuit; 11. Isolation circuit; 12. H-bridge circuit; 50. Serving turntable; 51. Ball groove; R35. Third resistor; R41. Fourth resistor; R15. Fifth resistor; C44. First capacitor; D7. Clamping diode.

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

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

[0034] It should be noted that if the embodiments of this utility model 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 specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this utility model 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 use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, 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. When 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 utility model.

[0036] In golf training and competition, golf tee machines are widely used for automatic ball delivery, allowing players to practice continuous shots or conduct match tests. A golf tee machine typically includes a motor 40 responsible for pushing the golf ball. However, in actual use, the golf ball may get stuck or other foreign objects may interfere with the normal operation of the motor 40, causing it to stall. This not only prevents the golf tee machine from functioning properly, but also, if power is continued while the motor 40 is stalled, it may overheat and be damaged, potentially posing a safety hazard.

[0037] To address the aforementioned problems, this utility model proposes an anti-stall circuit for use in a golf ball-launching device. The golf ball-launching device includes a motor 40. In this embodiment, the motor 40 is a bidirectional motor capable of rotating forward or in reverse. For ease of explanation, in this application, the direction in which the motor 40 rotates to push the golf ball is defined as the forward rotation direction, and the direction opposite to the forward rotation direction is defined as the reverse rotation direction.

[0038] Please see Figure 1 In one embodiment of this utility model, the anti-stall circuit includes a motor drive circuit 10, a current detection circuit 20, and a control circuit 30. The motor drive circuit 10 is electrically connected to the motor 40 and is used to drive the motor 40 to rotate forward or in reverse. The current detection circuit 20 is electrically connected to the motor drive circuit 10 and is used to detect the current of the motor drive circuit 10 and generate a corresponding current detection signal. The control circuit 30 is electrically connected to both the current detection circuit 20 and the motor drive circuit 10 and is used to control the motor drive circuit 10 to drive the motor 40 to rotate in the opposite direction of the current rotation direction when it is determined that the motor 40 is stalled based on the current detection signal.

[0039] In this embodiment, the motor drive circuit 10 may include an H-bridge circuit 12, bipolar transistors, relays, bidirectional thyristors, or chips specifically designed to drive the aforementioned bidirectional transistors, to drive the motor 40 to rotate forward or in reverse. Specifically, when the motor drive circuit 10 includes an H-bridge circuit 12, the H-bridge circuit 12 uses a bridge structure composed of four switching transistors to achieve forward and reverse rotation of the motor 40. When two diagonal switches are turned on, the motor 40 rotates in one direction; when the other set of diagonal switches are turned on, the motor 40 rotates in the opposite direction. When the motor drive circuit 10 uses bipolar transistors to drive the motor 40, for example, a bidirectional drive circuit is constructed using a pair of NPN and PNP transistors, with each transistor controlling one direction of the motor 40. When one transistor is turned on, the other is turned off, causing the motor 40 to rotate in a certain direction, and vice versa. When the drive circuit includes a relay, by controlling the coil of the relay, one of its two contacts is selectively closed to switch the power supply polarity of the motor 40, thereby changing the rotation direction of the motor 40. Furthermore, the motor drive circuit 10 can also employ a dedicated driver chip for driving the bidirectional motor 40. This driver chip integrates an H-bridge circuit 12 and other necessary protection circuits, and can control the forward, reverse, and stop of the motor 40 via simple digital signals, such as L298N or TB6612FNG. The specific driver chip model and parameters can be selected according to the specifications and requirements of the actual motor 40, and are not limited here.

[0040] In this embodiment, the current detection circuit 20 may include detection elements such as a sampling resistor, a Hall sensor, a current transformer, and a shunt, for detecting the current in the motor drive circuit 10. Specifically, when the current detection circuit 20 includes a sampling resistor, the sampling resistor can be connected in series with the motor drive circuit 10. When current flows through the resistor, a voltage drop proportional to the current magnitude is generated, and this voltage drop is used as a sampling signal, which reflects the magnitude of the current in the motor drive circuit 10. When the current detection circuit 20 includes a Hall sensor, the Hall sensor can detect the magnetic field generated by the current, thereby indirectly measuring the current. When current flows through a conductor, a magnetic field is generated perpendicular to the current direction. The Hall sensor can generate a corresponding electrical signal output based on the strength of the magnetic field to determine the magnitude of the current in the motor drive circuit 10. In addition, the current detection circuit 20 can also obtain the current signal of the motor drive circuit 10 by sensing through a current transformer, or directly measure the current through a shunt. In this embodiment, the current detection circuit 20 detects the current of the motor drive circuit 10 and generates a corresponding current detection signal, which is then transmitted to the control circuit 30 so that the control circuit 30 can determine whether the motor 40 is stalled based on the current detection signal.

[0041] In this embodiment, the control circuit 30 may include a microcontroller (MCU), a digital signal processor (DSP), a programmable logic controller (PLC), or other logic processing units and control units. It is used to receive current detection signals to determine whether the motor 40 is stalled, and when it is determined that the motor 40 is stalled, it controls the motor drive circuit 10 to drive the motor 40 to rotate in the opposite direction to its current rotation direction. It is understood that since the motor 40 may not be able to rotate when stalled, the current rotation direction of the motor 40 when stalled is the direction in which the motor 40 is controlled to rotate, or the rotation direction of the motor 40 before stalling.

[0042] Understandably, the current value of motor 40 is relatively stable during normal operation. When motor 40 stalls, the current in both motor 40 and motor drive circuit 10 increases sharply due to the increased load. Therefore, control circuit 30 can determine whether motor 40 is stalled by comparing the current value corresponding to the current detection signal with a preset threshold. When the current value corresponding to the current detection signal exceeds the preset threshold, control circuit 30 considers motor 40 to be stalled. At this time, control circuit 30 sends a control signal to motor drive circuit 10, causing motor drive circuit 10 to drive motor 40 to rotate in the opposite direction of its current rotation direction, thereby releasing any stuck golf balls or other foreign objects in the golf teeing device, restoring the normal operation of the golf teeing device, and preventing damage to motor 40 due to continuous stalling.

[0043] In this embodiment, the anti-stalling circuit includes a motor drive circuit 10, a current detection circuit 20, and a control circuit 30. The motor drive circuit 10 is electrically connected to the motor 40, the current detection circuit 20 is electrically connected to the motor drive circuit 10, and the control circuit 30 is electrically connected to both the current detection circuit 20 and the motor drive circuit 10. The current detection circuit 20 detects the current of the motor drive circuit 10, generates a corresponding current detection signal, and outputs it to the control circuit 30. When the control circuit 30 determines that the motor 40 is stalled based on the current detection signal, it controls the motor drive circuit 10 to drive the motor 40 to rotate in the opposite direction to the current rotation direction, so as to clear the golf ball or other foreign object in the golf teeing device, restore the normal operation of the golf teeing device, and at the same time prevent the motor 40 from being damaged due to continuous stalling.

[0044] In one feasible implementation, refer to Figure 2 The current detection circuit 20 includes a current sampling circuit 21 and an amplification circuit 22. The input terminal of the current sampling circuit 21 is connected to the motor drive circuit 10, and is used to sample the current of the motor drive circuit 10 and output a corresponding sampling signal. The input terminal of the amplification circuit 22 is connected to the output terminal of the current sampling circuit 21, and the output terminal of the amplification circuit 22 is electrically connected to the control circuit 30. The amplification circuit 22 is used to amplify the sampling signal and output a corresponding current detection signal.

[0045] In one feasible implementation, the current sampling circuit 21 includes a sampling resistor, the first end of which is electrically connected to both the motor drive circuit 10 and the amplifier circuit 22, and the second end of which is grounded. By using a resistor as the sampling element, the accuracy of current detection is ensured. By selecting an appropriate resistor value, the sampling signal can be guaranteed to be within the acceptable voltage range of the control circuit 30, while avoiding excessive impact on the motor drive circuit 10.

[0046] In one feasible implementation, refer to Figure 2 The sampling resistors include a third resistor R35 and a fourth resistor R41. The first terminal of the third resistor R35 is electrically connected to the motor drive circuit 10, and the second terminal of the third resistor R35 is grounded. The first terminal of the fourth resistor R41 is electrically connected to the motor drive circuit 10, and the second terminal of the fourth resistor R41 is grounded. By detecting the voltage across the first terminals of the third resistor R35 and the fourth resistor R41, accurate sampling of the current in the motor drive circuit 10 can be achieved. It is understood that this sampling circuit can also be configured with multiple sampling resistors connected in parallel or in series to adapt to different current detection ranges and accuracy requirements. The specific number of sampling resistors and the connection relationship between them are not limited here.

[0047] In one feasible implementation, refer to Figure 2 The amplification circuit 22 includes amplifier U16A. The non-inverting input of amplifier U16A is connected to the output of the current sampling circuit 21, the inverting input of amplifier U16A is grounded, and the output of amplifier U16A is electrically connected to the control circuit 30. In this embodiment, amplifier U16A can be an operational amplifier U16A, which has the characteristics of high input impedance and low output impedance, and can effectively amplify the sampling signal without putting too much load on the sampling circuit. By selecting the gain of amplifier U16A, it can be ensured that the output current detection signal has sufficient amplitude so that the control circuit 30 can accurately determine the stall state of motor 40. After the sampling signal output by the current sampling circuit 21 is amplified by the amplification circuit 22, the stability and anti-interference ability of the current detection signal can be further improved, ensuring that the control circuit 30 can accurately determine the stall state of motor 40.

[0048] In one feasible implementation, refer to Figure 2 The amplifier circuit 22 further includes a first resistor R40 and a second resistor R36. The first terminal of the first resistor R40 is connected to the inverting input of the amplifier U16A, and the second terminal of the first resistor R40 is grounded. The first terminal of the second resistor R36 is connected to the inverting input of the amplifier U16A, and the second terminal of the second resistor R36 is connected to the output terminal of the amplifier U16A. In this embodiment, the gain of the amplifier circuit 22 can be precisely controlled by adjusting the resistance values ​​of the first resistor R40 and the second resistor R36. Thus, the amplifier circuit 22 can be optimized for different motor drive circuits 10 and current detection requirements to ensure the accuracy and reliability of the current detection signal.

[0049] In one feasible implementation, refer to Figure 2 The current detection circuit 20 further includes a filter circuit 23. The first terminal of the filter circuit 23 is electrically connected to the current sampling circuit 21, and the second terminal of the filter circuit 23 is electrically connected to the amplification circuit 22. By setting the filter circuit 23 between the current detection circuit 20 and the amplification circuit 22, the influence of noise and interference on the current detection signal during transmission can be effectively reduced, improving the accuracy of current detection. In this embodiment, the filter circuit 23 can specifically be an RC filter circuit 23, an LC filter circuit 23, an RCL filter circuit 23, an active filter circuit 23, or a digital filter circuit 23, etc., and its specific structure is not limited here.

[0050] In one feasible implementation, refer to Figure 2The filter circuit 23 includes a fifth resistor R15 and a first capacitor C44. The first terminal of the fifth resistor R15 is electrically connected to the sampling circuit, and the second terminal of the fifth resistor R15 is connected to the non-inverting input of the amplifier U16A. The first terminal of the first capacitor C44 is also connected to the non-inverting input of the amplifier U16A, and the second terminal of the second capacitor is grounded. In this embodiment, the LC filter circuit 23 formed by the fifth resistor R15 and the first capacitor C44 can effectively filter out high-frequency noise while maintaining the stability and accuracy of the current detection signal. The parameters of the fifth resistor R15 and the first capacitor C44 in this LC filter circuit 23 can also be adjusted according to actual application requirements to achieve the best filtering effect.

[0051] In one feasible implementation, refer to Figure 2 The current detection circuit 20 further includes a clamping circuit 24. The first terminal of the clamping circuit 24 is electrically connected to the output terminal of the amplifier circuit 22, and the second terminal of the clamping circuit 24 is electrically connected to the control circuit 30. In this embodiment, the clamping circuit 24 is used to limit the voltage range of the current detection signal to prevent excessive voltage from damaging the control circuit 30. The clamping circuit 24 can employ diodes, Zener diodes, or other voltage limiting components to ensure that the current detection signal remains within a safe voltage range. When the current detection signal exceeds a set voltage threshold, the clamping circuit 24 will limit the signal below that threshold, thereby protecting the control circuit 30 from damage. Furthermore, the clamping circuit 24 can also adapt its parameters to different current detection ranges and accuracy requirements to ensure the stability and reliability of the current detection signal.

[0052] In one feasible implementation, refer to Figure 2 The clamping circuit 24 includes a clamping diode D7. The cathode of the clamping diode D7 is connected to an external power supply, and the anode of the clamping diode D7 is connected to the output terminal of the amplifier U16A. When the current detection signal is normal, the clamping diode D7 is in a reverse bias state and will not affect the normal operation of the circuit. However, once the voltage of the current detection signal exceeds a set threshold, the clamping diode D7 will conduct in the forward direction, limiting the voltage of the current detection signal within a safe range, thereby avoiding damage to the control circuit 30 and contributing to the stable operation of the anti-locked rotor circuit.

[0053] In one feasible implementation, refer to Figure 3The motor drive circuit 10 includes an isolation circuit 11 and an H-bridge circuit 12. The first end of the isolation circuit 11 is electrically connected to the control circuit 30. The H-bridge circuit 12 is electrically connected to the second end of the isolation circuit 11. The H-bridge circuit 12 is used to drive the motor 40 to rotate forward or in reverse according to the control signal output by the control circuit 30. The isolation circuit 11 is used to achieve electrical isolation between the control circuit 30 and the H-bridge circuit 12.

[0054] In this embodiment, the isolation circuit 11 can employ components such as optocouplers or relays to ensure electrical isolation between the control circuit 30 and the motor drive circuit 10. Optocouplers offer excellent isolation performance and fast response time, effectively isolating high voltage and high current while ensuring signal transmission. Relays provide stronger driving capability and are suitable for motors 40 requiring larger current drives. By selecting appropriate isolation components, the safety of the control circuit 30 and the stable operation of the motor drive circuit 10 can be ensured. The H-bridge circuit 12 includes four switching transistors, such as transistors or MOSFETs, arranged in an H-shape and connected to the two terminals of the motor 40. By controlling the on and off states of these four switching transistors, the forward, reverse, and stop functions of the motor 40 can be achieved.

[0055] In one feasible implementation, refer to Figure 3 The isolation circuit 11 includes an optocoupler. The first end of the optocoupler is electrically connected to the control circuit 30, and the second end is electrically connected to the H-bridge circuit 12. In this embodiment, the optocoupler, as an isolation element, effectively isolates electrical interference between the control circuit 30 and the motor drive circuit 10. The LED inside the optocoupler emits light upon receiving a signal from the control circuit 30, causing the phototransistor to conduct, thereby transmitting the signal to the H-bridge circuit 12. This not only ensures stable transmission of the control signal but also avoids potential damage to the control circuit 30 caused by the high voltage and high current generated by the motor drive circuit 10.

[0056] In this embodiment, the anti-stalling circuit includes a motor drive circuit 10, a current detection circuit 20, and a control circuit 30. The motor drive circuit 10 is electrically connected to the motor 40, the current detection circuit 20 is electrically connected to the motor drive circuit 10, and the control circuit 30 is electrically connected to both the current detection circuit 20 and the motor drive circuit 10. The current detection circuit 20 detects the current of the motor drive circuit 10, generates a corresponding current detection signal, and outputs it to the control circuit 30. When the control circuit 30 determines that the motor 40 is stalled based on the current detection signal, it controls the motor drive circuit 10 to drive the motor 40 to rotate in the opposite direction to the current rotation direction, so as to clear the golf ball or other foreign object in the golf teeing device, restore the normal operation of the golf teeing device, and at the same time prevent the motor 40 from being damaged due to continuous stalling.

[0057] This utility model also proposes a golf ball-launching device, see reference. Figure 4 The golf ball-tackling device includes a ball-tack turntable 50, a motor 40, and the aforementioned anti-blocking circuit. The ball-tack turntable 50 has multiple ball slots 51 around its periphery for placing golf balls, and the motor 40 is connected to the ball-tack turntable 50 in a driving connection.

[0058] The specific structure of the motor 40 and the anti-blocking circuit is as described in the above embodiments. Since this golf ball-handling device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The ball-handling turntable 50 and the motor 40 can be connected by gears, belts, or other transmission mechanisms to ensure that the power generated by the rotation of the motor 40 can be effectively transmitted to the ball-handling turntable 50. During the normal operation of the golf ball-handling device, the motor 40 drives the ball-handling turntable 50 to rotate at a certain speed, causing the golf balls to sequentially enter the ball groove 51 from one side of the ball-handling turntable 50, and causing the golf balls in the ball groove 51 to be sequentially thrown out from the other end of the ball-handling turntable 50, so that players can conduct continuous hitting practice or test matches.

[0059] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An anti-stall circuit, applied to a golf teeing device, the golf teeing device including a motor, characterized in that, The anti-stall circuit includes: A motor drive circuit, electrically connected to the motor, is used to drive the motor to rotate forward or in reverse. A current detection circuit, electrically connected to the motor drive circuit, is used to detect the current of the motor drive circuit and generate a corresponding current detection signal. The control circuit is electrically connected to the current detection circuit and the motor drive circuit respectively, and is used to control the motor drive circuit to drive the motor to rotate in the opposite direction of the current rotation direction when the motor is determined to be stalled based on the current detection signal. The current detection circuit includes: A current sampling circuit, the input terminal of which is connected to the motor drive circuit, is used to sample the current of the motor drive circuit and output a corresponding sampling signal. An amplifier circuit is provided, wherein the input terminal of the amplifier circuit is connected to the output terminal of the current sampling circuit, and the output terminal of the amplifier circuit is electrically connected to the control circuit; the amplifier circuit is used to amplify the sampling signal and output a corresponding current detection signal. The current sampling circuit includes a sampling resistor, the first end of which is electrically connected to the motor drive circuit and the amplifier circuit respectively, and the second end of the sampling resistor is grounded. The amplification circuit includes an amplifier, the non-inverting input of which is connected to the output of the current sampling circuit, the inverting input of which is grounded, and the output of which is electrically connected to the control circuit. The amplifier circuit further includes a first resistor and a second resistor. The first end of the first resistor is connected to the inverting input of the amplifier, the second end of the first resistor is grounded, the first end of the second resistor is connected to the inverting input of the amplifier, and the second end of the second resistor is connected to the output input of the amplifier. The current detection circuit further includes a filter circuit, the first end of which is electrically connected to the current sampling circuit, and the second end of which is electrically connected to the amplification circuit. The current detection circuit further includes a clamping circuit, the first terminal of which is electrically connected to the output terminal of the amplifier circuit, and the second terminal of which is electrically connected to the control circuit. The motor drive circuit includes: An isolation circuit, wherein a first terminal of the isolation circuit is electrically connected to the control circuit; The H-bridge circuit is electrically connected to the second terminal of the isolation circuit; the H-bridge circuit is used to drive the motor to rotate forward or in reverse according to the control signal output by the control circuit; the isolation circuit is used to achieve electrical isolation between the control circuit and the H-bridge circuit. The isolation circuit includes an optocoupler, the first end of which is electrically connected to the control circuit, and the second end of which is electrically connected to the H-bridge circuit.

2. A golf ball-tackling device, characterized in that, The golf tee includes: A ball-handling turntable, wherein the circumference of the ball-handling turntable is provided with a plurality of grooves for placing golf balls; The motor is connected to the serving turntable via a transmission. And, the anti-stall circuit as described in claim 1.

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