Locked-rotation protection device of automatic feeding equipment and automatic feeding equipment

Abstract

The invention provides a locked-rotor protection device of automatic feeding equipment and the automatic feeding equipment, and relates to the technical field of feeding equipment.The locked-rotor protection device is applied to the automatic feeding equipment, the automatic feeding equipment comprises a moving part, and the moving part is driven by a target motor to operate; the device comprises a control module, a motor driving module, a current detection module and a position detection module, wherein the control module is respectively connected with the motor driving module, the current detection module and the position detection module; the motor driving module is connected with the target motor, and the motor driving module is used for driving the target motor to control the operation state of the moving part; the current detection module is connected with the target motor, and the current detection module is used for detecting the working current of the target motor in real time and sending a current signal to the control module; the position detection module is used for detecting the position of the moving part and sending a position signal to the control module. The safety and reliability of the automatic feeding equipment are remarkably improved.

Description

Technical Field

[0001] This application relates to the field of feeding equipment technology, specifically to a stall protection device for an automatic feeding device and an automatic feeding device. Background Technology

[0002] With the rapid development of the pet economy, smart pet feeders are increasingly becoming the preferred choice for pet owners due to their intelligent functions such as timed and quantitative feeding and remote control.

[0003] Current smart pet feeders on the market typically feature two core moving components: a rotating food bowl and a movable door. When the food bowl or door is rotating, if a pet approaches out of curiosity, or if a foreign object accidentally gets stuck, the operation will be forced to stop. In this situation, the continuous mechanical force may cause injury to the pet's limbs, and will also damage the feeder's internal components, thus shortening the device's lifespan and affecting its normal function. Therefore, preventing abnormal stalling in smart pet feeders is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, this application provides a stall protection device for an automatic feeding device and an automatic feeding device, which effectively solves the problem of abnormal stalling of intelligent pet feeders.

[0005] In a first aspect, this application provides a stall protection device for an automatic feeding device. The stall protection device is applied to the automatic feeding device, which includes a moving part driven by a target motor. The stall protection device includes a control module, a motor drive module, a current detection module, and a position detection module, wherein: The control module is connected to the motor drive module, the current detection module, and the position detection module, respectively. The motor drive module is connected to the target motor and is used to drive the target motor to control the operating state of the moving parts. The current detection module is connected to the target motor. The current detection module is used to detect the operating current of the target motor in real time and send the current signal to the control module. The position detection module is used to detect the position of the moving part and send the position signal to the control module; If the control module detects that the duration of the operating current exceeding the preset current threshold is greater than the first time threshold, it determines that the moving part is stalled. The control module sends a control signal to the motor drive module to drive the target motor to stop or reverse until the position detection module detects that the moving part has returned to the initial preset position.

[0006] In an optional implementation, the control module includes a time monitoring unit, which monitors the continuous running time of the target motor after it starts. If the continuous running time exceeds a second time threshold, it is determined that the moving part has stalled. The control module sends a control signal to the motor drive module to drive the target motor to stop or reverse until the position detection module detects that the moving part has returned to the initial preset position.

[0007] In an optional implementation, the motor drive module is a motor drive chip, which converts the digital control signals of the control module into current output signals that can drive the target motor to operate.

[0008] In an optional implementation, the current detection module includes an input unit, an operational amplifier unit, and an output unit, wherein: The input unit is connected to the target motor. The input unit is used to sample the current signal of the target motor, and to perform voltage division and filtering on the current signal to obtain a first current signal and input it to the operational amplifier unit. The operational amplifier unit is connected to the input unit, and the operational amplifier unit is used to amplify and condition the first current signal to obtain a second current signal and input it to the output unit; The output unit is connected to the operational amplifier unit and the control module respectively. The output unit is used to filter the second current signal to obtain the target current signal and input it to the control module.

[0009] In an optional embodiment, the input unit includes a first voltage divider resistor, a second voltage divider resistor, a first current limiting resistor, a first bias resistor, a second bias resistor, and a first filter capacitor, wherein: The first end of the first voltage divider resistor is connected to the target motor, and the second end of the first voltage divider resistor is connected to the first end of the first current limiting resistor and the first end of the first filter capacitor, and together they are connected to the operational amplifier unit. The second terminal of the first current-limiting resistor is connected to the first terminal of the first bias resistor and the first terminal of the second bias resistor. The second terminal of the first bias resistor is grounded, the second terminal of the second bias resistor is connected to the power supply, and the second terminal of the first filter capacitor is grounded. The first end of the second voltage divider resistor is grounded, and the second end of the second voltage divider resistor is connected to the operational amplifier unit.

[0010] In an optional embodiment, the operational amplifier unit includes an operational amplifier, a feedback resistor, a compensation capacitor, a second filter capacitor, and a third filter capacitor, wherein: The non-inverting input terminal of the operational amplifier is connected to the second terminal of the first voltage divider resistor, the inverting input terminal of the operational amplifier is connected to the second terminal of the second voltage divider resistor, the first terminal of the feedback resistor and the first terminal of the compensation capacitor, the second terminal of the feedback resistor is connected to the second terminal of the compensation capacitor, and they are all connected to the output terminal of the operational amplifier. The positive power supply terminal of the operational amplifier is connected to the first terminal of the second filter capacitor and the first terminal of the third filter capacitor, and the second terminal of the second filter capacitor is grounded, the second terminal of the third filter capacitor is grounded, and the negative power supply terminal of the operational amplifier is grounded.

[0011] In an optional embodiment, the output unit includes a second current-limiting resistor, a third current-limiting resistor, a fourth filter capacitor, and a fifth filter capacitor, wherein: The first end of the second current-limiting resistor is connected to the output terminal of the operational amplifier. The second end of the second current-limiting resistor is connected to the first end of the third current-limiting resistor and the first end of the fourth filter capacitor. The second end of the third current-limiting resistor is connected to the first end of the fifth filter capacitor and the control module. The second end of the fourth filter capacitor is grounded, and the second end of the fifth filter capacitor is grounded.

[0012] In an optional embodiment, the position detection module includes at least two photoelectric switches, which are respectively disposed at the starting position and the ending position of the moving part. Each photoelectric switch includes an infrared emitting tube and an infrared receiving tube groove disposed opposite to each other.

[0013] Secondly, this application provides an automatic feeding device, which includes at least a moving part and a stall protection device for the automatic feeding device described in any of the foregoing embodiments.

[0014] In an optional embodiment, a baffle is provided on the moving part, and the baffle passes through the position detection module as it moves with the moving part.

[0015] The stall protection device and automatic feeding equipment provided in this application achieve stall protection through a dual mechanism of current detection and time monitoring, significantly improving the safety and reliability of the automatic feeding equipment. By real-time detection of the motor's operating current and judgment based on the duration of continuous exceedance of the threshold, abnormal loads can be quickly identified, preventing the feeding object from being pinched by moving parts or the motor from burning out. Simultaneously, a running component timeout judgment is introduced as backup protection, forming a redundancy mechanism to effectively cope with abnormal situations such as sensor failure. Combined with position feedback and automatic reset control, the device has self-recovery capabilities, enabling it to re-attempt operation after clearing a brief obstruction, ensuring the smooth completion of the feeding process. This improves both the intelligence level of the equipment and the user experience. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a first schematic diagram of the stall protection device structure of the automatic feeding equipment provided in this application embodiment; Figure 2 This is a circuit schematic diagram of the current detection module in an embodiment of this application; Figure 3 This is a second schematic diagram of the stall protection device structure of the automatic feeding equipment provided in this application embodiment; Figure 4 This is a schematic diagram of the structure of the automatic feeding device provided in the embodiments of this application.

[0018] Explanation of key component symbols: 100 - Stall protection device for automatic feeding equipment; 110 - Control module; 111 - Time monitoring unit; 120 - Motor drive module; 130 - Current detection module; 140 - Position detection module; 200 - Automatic feeding equipment; 210 - Moving parts; 220 - Target motor. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be further described clearly and completely below with reference to the accompanying drawings of the embodiments. It should be noted that the described embodiments are merely some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0022] Most common smart pet feeders are equipped with two key movement mechanisms: a rotating food bowl for storing food to meet the pet's eating needs at different stages, and a food bowl door for keeping food fresh, which is opened during mealtimes and closed when not in use to prevent spoilage.

[0023] However, in actual use, there are significant safety hazards. When the food dish or door is rotating, if a pet approaches out of curiosity, or if other objects accidentally get stuck, the rotation will be forcibly interrupted. The sustained force at this time can easily pinch and injure the pet. Furthermore, this abnormal situation can damage the feeder's components, affecting its lifespan and normal function.

[0024] Example 1 This application provides a stall protection device for an automatic feeding device, which effectively solves the problem of abnormal stalling in intelligent pet feeders. Figure 1 This is a first schematic diagram of the stall protection device structure of the automatic feeding equipment provided in this application embodiment, as shown below. Figure 1 As shown, the stall protection device 100 of the automatic feeding device is applied to the automatic feeding device, which includes a moving part 210, which is driven by a target motor 220. The stall protection device 100 of the automatic feeding device includes a control module 110, a motor drive module 120, a current detection module 130, and a position detection module 140.

[0025] In this embodiment, the automatic feeding device can be a smart pet feeder, and the moving part 210 can be a food tray or a door.

[0026] The control module 110 is connected to the motor drive module 120, the current detection module 130 and the position detection module 140 respectively. The control module 110 is used to receive the detection signals from the current detection module 130 and the position detection module 140 and send control signals to the motor drive module 120. The control module 110 can be one or more of the following devices: microcontroller, single-chip microcomputer and programmable logic array.

[0027] The motor drive module 120 is connected to the target motor 220. The motor drive module 120 is used to drive the target motor 220 to control the operation of the moving part 210.

[0028] In this embodiment, the motor drive module 120 receives control signals from the control module 110 and drives the target motor 220 to perform predetermined actions according to the control signals. The output shaft of the target motor 220 is connected to the rotating shaft of the food tray or the storage door through a coupling or gear transmission mechanism, thereby driving the food tray or the storage door to rotate.

[0029] As an optional implementation of this application, the motor drive module 120 can use a motor drive chip to achieve precise direction and start / stop control of the target motor 220. The motor drive chip converts the digital control signal of the control module 110 into a current output signal that can drive the target motor 220 to operate, thereby realizing the electronic control switching of the target motor 220 in forward / reverse rotation, braking, and standby states.

[0030] For example, the motor driver chip is a dual-channel H-bridge driver chip, and its connection relationship with the control module 110 and the target motor 220 is as follows: The input terminals IN1 and IN2 of the motor driver chip are connected to the general-purpose GPIO pins of the control module 110 to receive control signals from the control module 110. For example, when IN1 = high level and IN2 = low level, the target motor 220 is driven to rotate forward; when IN1 = low level and IN2 = high level, the target motor 220 is driven to rotate in reverse; when IN1 = IN2 = low level or high level, the target motor 220 enters a braking or free-stop state. The output terminals OUT1 and OUT2 are directly connected to the two ends of the target motor 220 to provide drive current, forming a complete power supply circuit.

[0031] The motor drive module 120 provided in this application embodiment achieves precise control of motor start-stop, direction and speed through a dedicated motor drive chip. At the same time, with its high integration and protection functions, it enhances the safety and response speed of the entire device.

[0032] The current detection module 130 is connected to the target motor 220. The current detection module 130 is used to detect the operating current of the target motor 220 in real time and send the current signal to the control module 110.

[0033] As an optional implementation of this application, the current detection module 130 is connected to the power supply circuit of the target motor 220 through a sampling resistor. Its output is conditioned by operational amplifier U1 and then connected to the ADC interface of the control module 110 to convert the current signal into a voltage signal for digital processing. The current detection module 130 includes an input unit, an operational amplifier unit, and an output unit. The input unit is connected to the target motor 220 and is used to sample the current signal from the target motor 220, perform voltage division and filtering on the current signal to obtain a first current signal, which is then input to the operational amplifier unit.

[0034] Figure 2 This is a circuit schematic diagram of the current detection module 130 in an embodiment of this application, as shown below. Figure 2 As shown, the input unit includes a first voltage divider resistor R1, a second voltage divider resistor R2, a first current limiting resistor R3, a first bias resistor R4, a second bias resistor R5, and a first filter capacitor C1, wherein: The first terminal of the first voltage divider resistor R1 is connected to the target motor 220. The second terminal of the first voltage divider resistor R1 is connected to the first terminal of the first current-limiting resistor R3 and the first terminal of the first filter capacitor C1, and together they are connected to the operational amplifier unit. The second terminal of the first current-limiting resistor R3 is connected to the first terminal of the first bias resistor R4 and the first terminal of the second bias resistor R5. The second terminal of the first bias resistor R4 is grounded, the second terminal of the second bias resistor R5 is connected to the power supply, the second terminal of the first filter capacitor C1 is grounded, the first terminal of the second voltage divider resistor R2 is grounded, and the second terminal of the second voltage divider resistor R2 is connected to the operational amplifier unit.

[0035] In this embodiment, the first voltage divider resistor R1 and the second voltage divider resistor R2 form a voltage divider network to introduce the current sampling signal of the target motor 220 to the input terminal of the operational amplifier U1. The first bias resistor R4 and the second bias resistor R5 are used to set the input bias current for matching, ensuring the stability of the input current sampling signal. The first current limiting resistor R3 and the first filter capacitor C1 constitute an RC filter network to suppress high-frequency noise, ensure the purity of the input current sampling signal, and finally obtain the first current signal.

[0036] The operational amplifier unit is connected to the input unit. This operational amplifier unit is used to amplify and condition the first current signal to obtain a second current signal and input it to the output unit.

[0037] like Figure 2 As shown, the operational amplifier unit includes an operational amplifier U1, a feedback resistor R6, a compensation capacitor C2, a second filter capacitor C3, and a third filter capacitor C4. For example, the operational amplifier U1 can use an LMV321B chip, wherein: the non-inverting input terminal +IN of the operational amplifier U1 is connected to the second terminal of the first voltage divider resistor R1; the inverting input terminal -IN of the operational amplifier U1 is connected to the second terminal of the second voltage divider resistor R2, the first terminal of the feedback resistor R6, and the first terminal of the compensation capacitor C2; the second terminal of the feedback resistor R6 is connected to the second terminal of the compensation capacitor C2, and together they are connected to the output terminal OUT of the operational amplifier U1. The positive power supply terminal +VS of the operational amplifier U1 is connected to the first terminal of the second filter capacitor C3 and the first terminal of the third filter capacitor C4, and together they are connected to the power supply; the second terminal of the second filter capacitor C3 is grounded; the second terminal of the third filter capacitor C4 is grounded; and the negative power supply terminal -VS of the operational amplifier U1 is grounded.

[0038] In this embodiment, the inverting input terminal -IN of operational amplifier U1 is connected to the output terminal OUT through feedback resistor R6, forming a negative feedback structure. This negative feedback configuration allows operational amplifier U1 to operate in the linear amplification region, stably amplifying the input signal to obtain the second current signal. When the op-amp operates at high frequency, internal phase shift may cause the negative feedback to become positive feedback, triggering self-oscillation. At this time, compensation capacitor C2 plays a role in phase lead compensation. The second filter capacitor C3 and the third filter capacitor C4 are used for power supply filtering, respectively filtering out high-frequency and low-frequency noise in the power supply to ensure power supply stability.

[0039] The output unit is connected to the operational amplifier unit and the control module 110 respectively. The output unit is used to filter the second current signal to obtain the target current signal and input it to the control module 110.

[0040] like Figure 2 As shown, the output unit includes a second current-limiting resistor R7, a third current-limiting resistor R8, a fourth filter capacitor C5, and a fifth filter capacitor C6. The first terminal of the second current-limiting resistor R7 is connected to the output terminal OUT of the operational amplifier U1. The second terminal of the second current-limiting resistor R7 is connected to the first terminal of the third current-limiting resistor R8 and the first terminal of the fourth filter capacitor C5. The second terminal of the third current-limiting resistor R8 is connected to the first terminal of the fifth filter capacitor C6 and the control module 110. The second terminal of the fourth filter capacitor C5 is grounded, and the second terminal of the fifth filter capacitor C6 is grounded.

[0041] In this embodiment, the second current-limiting resistor R7, the third current-limiting resistor R8, the fourth filter capacitor C5, and the fifth filter capacitor C6 constitute an RC filter network, which is used to adjust the amplitude of the output second current signal and filter out high-frequency noise in the second current signal to ensure that a stable target current signal is output to the control module 110.

[0042] The current detection module 130 provided in this application embodiment amplifies and conditions the input current sampling signal through operational amplifier U1. After filtering and impedance matching, it outputs a stable target current signal to control module 110 to ensure the accuracy and reliability of current detection.

[0043] The position detection module 140 is used to detect the position of the moving part 210 and send the position signal to the control module 110.

[0044] As an optional implementation of this application, the position detection module 140 includes at least two photoelectric switches, which are respectively set at the starting position and the ending position of the moving part 210. The first photoelectric switch is set at the starting position, and the second photoelectric switch is set at the ending position. Each photoelectric switch includes a groove, with an infrared emitting tube and an infrared receiving tube disposed opposite each other at both ends of the groove. In the default state, the infrared emitting tube emits infrared light, and the infrared receiving tube can receive the infrared signal. If the path between the emitting and receiving tubes is blocked, the infrared receiving tube cannot receive the infrared signal. The position detection module 140 transmits the status of whether the infrared signal can be received to the control module 110 via GPIO.

[0045] As a further implementation of the embodiments of this application, Figure 3 This is a second schematic diagram of the stall protection device structure of the automatic feeding equipment provided in this application embodiment, as shown below. Figure 3 As shown, the control module 110 includes a time monitoring unit 111, which is used to monitor the continuous running time of the target motor 220 after it starts. The control module 110 sends a start signal to the motor drive module 120 via GPIO to trigger the target motor 220 to start rotating in the forward direction. At the same time, the internal time monitoring unit 111 starts and records the continuous running time of the target motor 220.

[0046] The working process of the stall protection device for the automatic feeding equipment provided in this application embodiment specifically includes the following steps: First, the control module 110 determines that the first photoelectric switch of the position detection module 140 is valid, indicating that the feeding tray or the door is in the starting position of the movement. The control module 110 sends a control signal to the motor drive module 120, which drives the target motor 220 to rotate the feeding tray or the door. At the same time, the time monitoring unit 111 inside the control module 110 begins to record the continuous running time of the target motor 220. T .

[0047] Then, the current detection module 130 monitors the operating current of the target motor 220 in real time. I And it feeds back to the control module 110.

[0048] In this embodiment, the target motor 220 needs to be equipped with a stall current. If the normal current of the target motor 220 during normal rotation is... I normal When a stall occurs, the stall current is I stall Stalled rotor current I stall Normal current is generally set. I normalThe current is twice or more than 200mA. For example, if the target motor 220 is operating normally with a rated current of 200mA, and if the target motor 220 is blocked and cannot rotate, the current of the target motor 220 will continue to increase, for example, to 500mA. At this time, the target motor 220 will heat up, and if this continues for too long, it will burn out the target motor 220. To avoid the target motor 220 from being blocked and burning out, a blocking current needs to be set. For example, when the control module 110 detects that the current of the target motor 220 reaches 400mA, which is much greater than the normal rated current, it determines that the target motor 220 is blocked. The control module 110 immediately issues a stop command for the target motor 220, thereby causing the target motor 220 to stop or reverse, and the current of the target motor 220 decreases until it returns to normal.

[0049] If a pet or foreign object blocks the rotation path while the target motor 220 is driving the feeding tray or bin door, the control module 110 will detect the operating current of the target motor 220. I If the operating current suddenly increases and the duration of the current exceeding the preset current threshold is greater than the first time threshold, it is determined that the feed tray or the door is stalled. The control module 110 sends a control signal to the motor drive module 120 to drive the target motor 220 to stop or reverse its operation until the position detection module 140 detects that the feed tray or the door has returned to the starting position. At this time, the control module 110 stops controlling the motor drive module 120 to drive the target motor 220 to rotate and turns off the timer.

[0050] Optionally, the preset current threshold can be set to the stall current of the target motor 220. I stall The first time threshold can be set according to the actual situation.

[0051] On the other hand, if a pet or foreign object blocks the rotation path, the feeding tray and the door will not be able to reach the destination, thus reducing the continuous running time of the target motor 220. T If the continuous running time continues to increase... T If the second time threshold is exceeded, it is determined that the feeding tray and the door are stuck. At this time, the control module 110 sends a control signal to the motor drive module 120 to drive the target motor 220 to stop or reverse its operation until the position detection module 140 detects that the feeding tray and the door have returned to the starting position. At this time, the control module 110 stops controlling the motor drive module 120 to drive the target motor 220 to rotate and turns off the timer.

[0052] Optionally, the second time threshold can be set according to the actual situation, and the first time threshold is less than the second time threshold.

[0053] In this embodiment, the stall judgment triggered by the current detection module 130 has a higher priority than the stall judgment triggered by the time monitoring unit 111. When the current detection module 130 fails, the time monitoring module can still realize stall identification and response as a backup protection mechanism.

[0054] In this embodiment, when the food tray or the door returns to the starting position, the control module 110 restarts the next rotation process after a preset delay.

[0055] If no stall occurs during the rotation of the feed tray or compartment door by the target motor 220, the target motor 220 continues to work until the control module 110 determines that the second photoelectric switch is valid, indicating that the feed tray or compartment door has reached the end position of the movement. The control module 110 then sends a control signal, and the target motor 220 stops rotating, thus completing one full rotation process.

[0056] The stall protection device for the automatic feeding equipment provided in this application embodiment achieves stall protection through a dual mechanism of current detection and time monitoring, significantly improving the safety and reliability of the automatic feeding equipment. By detecting the motor operating current in real time and judging based on the continuous exceeding of the threshold time, abnormal loads can be quickly identified, preventing the feeding object from being pinched by moving parts or the motor from burning out. At the same time, the introduction of a running component timeout judgment as backup protection forms a redundancy mechanism, effectively dealing with abnormal situations such as sensor failure.

[0057] Example 2 Based on the same technical concept as Embodiment 1 above, this application provides an automatic feeding device. Figure 4 This is a schematic diagram of the structure of the automatic feeding device provided in the embodiments of this application, as shown below. Figure 4 As shown, the automatic feeding device 200 includes a moving part 210 and a stall protection device 100 of the automatic feeding device in Embodiment 1. The moving part 210 includes, but is not limited to, components such as a feeding tray and a door.

[0058] As an optional implementation of this application, a baffle is provided on the moving part 210, and the baffle passes through the position detection module 140 of the stall protection device 100 of the automatic feeding device when it follows the movement of the moving part 210.

[0059] In this embodiment, when the moving part 210 operates, the baffle passes through the groove of the photoelectric switch. When the baffle is inside the groove, the infrared signal is triggered, thus confirming the position of the moving part 210. When the motor of the moving part 210 is not running, the moving part 210 is at the starting position of movement, and the baffle is located in the groove of the first photoelectric switch of the position detection module 140. At this time, the infrared signal of the first photoelectric switch is triggered, and the control module 110 determines that the first photoelectric switch of the position detection module 140 is valid. When the motor rotates, the baffle also rotates with the moving part 210 until it reaches the end position of movement. The baffle is located in the groove of the second photoelectric switch of the position detection module 140. At this time, the infrared signal of the second photoelectric switch is triggered, and the control module 110 determines that the second photoelectric switch of the position detection module 140 is valid. If the moving part 210 is blocked during rotation, the baffle will not be able to reach the groove of the second photoelectric switch at the end position of movement. When the motor runs continuously for an extended period of time, it is considered that a stall has occurred.

[0060] The automatic feeding device provided in this application embodiment can effectively avoid injury to the pet being fed and damage to the device, improve the stability and safety of the device, ensure the pet's regular eating habits, reduce the user's care burden, and significantly improve the user experience.

[0061] It is understood that the implementation method of the stall protection device of the automatic feeding device in Embodiment 1 above is also applicable to this embodiment and can achieve the same technical effect, so it will not be described again here.

[0062] In summary, the stall protection device and automatic feeding device provided in this application achieve stall protection through a dual mechanism of current detection and time monitoring, significantly improving the safety and reliability of the automatic feeding device. By real-time detection of the motor's operating current and judgment based on the duration of continuous exceedance of the threshold, abnormal loads can be quickly identified, preventing the feeding object from being pinched by moving parts or the motor from burning out. Simultaneously, the introduction of a running component timeout judgment as backup protection forms a redundancy mechanism, effectively addressing abnormal situations such as sensor failure. Combined with position feedback and automatic reset control, the device has self-recovery capabilities, enabling it to re-attempt operation after eliminating temporary obstructions, ensuring the smooth completion of the feeding process. This not only improves the intelligence level of the equipment but also enhances the user experience.

[0063] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0064] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A stall protection device for an automatic feeding apparatus, characterized by, The stall protection device is applied to an automatic feeding device, the automatic feeding device comprises a moving component, the moving component is driven to operate by a target motor, and the stall protection device comprises a control module, a motor driving module, a current detection module and a position detection module. The control module is connected with the motor driving module, the current detection module and the position detection module respectively. The motor driving module is connected with the target motor, and the motor driving module is used for driving the target motor to control the operating state of the moving component. The current detection module is connected with the target motor, and the current detection module is used for detecting the working current of the target motor in real time and sending a current signal to the control module. The position detection module is used for detecting the position of the moving component and sending a position signal to the control module. If the control module detects that the duration that the working current exceeds a preset current threshold is greater than a first time threshold, it is determined that the moving component stalls, the control module sends a control signal to the motor driving module to drive the target motor to stop operating or reverse operating until the position detection module detects that the moving component returns to an initial preset position.

2. A stall protection device for an automatic feeding apparatus according to claim 1, characterized in that The control module comprises a time monitoring unit, the time monitoring unit is used for monitoring the continuous operating time after the target motor starts, if the continuous operating time exceeds a second time threshold, it is determined that the moving component stalls, the control module sends a control signal to the motor driving module to drive the target motor to stop operating or reverse operating until the position detection module detects that the moving component returns to an initial preset position.

3. The stall guard for an automatic feeding apparatus of claim 1, wherein The motor driving module is a motor driving chip, the motor driving chip converts a digital control signal of the control module into a current output signal capable of driving the target motor to operate.

4. The stall guard for an automatic feeding apparatus of claim 1, wherein The current detection module comprises an input unit, an operational amplifier unit and an output unit. The input unit is connected with the target motor, and the input unit is used for sampling a current signal of the target motor and performing voltage division and filtering processing on the current signal to obtain a first current signal and input the first current signal to the operational amplifier unit. The operational amplifier unit is connected with the input unit, and the operational amplifier unit is used for amplifying and conditioning the first current signal to obtain a second current signal and input the second current signal to the output unit. The output unit is connected with the operational amplifier unit and the control module respectively, and the output unit is used for filtering processing on the second current signal to obtain a target current signal and input the target current signal to the control module.

5. A stall protection device for an automatic feeding apparatus according to claim 4, characterized in that The input unit comprises a first voltage division resistor, a second voltage division resistor, a first current limiting resistor, a first bias resistor, a second bias resistor and a first filtering capacitor. The first end of the first voltage division resistor is connected with the target motor, the second end of the first voltage division resistor is connected with the first end of the first current limiting resistor and the first end of the first filtering capacitor, and the first end of the first voltage division resistor and the first end of the first filtering capacitor are connected with the operational amplifier unit. The first end of the first current-limiting resistor is connected to the first end of the first biasing resistor and the first end of the second biasing resistor, the second end of the first biasing resistor is grounded, and the second end of the second biasing resistor is connected to a power supply; the second end of the first filter capacitor is grounded. The first end of the second voltage-dividing resistor is grounded, and the second end of the second voltage-dividing resistor is connected to the operational amplifier unit.

6. A stall protection device for an automatic feeding apparatus according to claim 5, wherein The operational amplifier unit comprises an operational amplifier, a feedback resistor, a compensation capacitor, a second filter capacitor and a third filter capacitor, wherein: The same direction input end of the operational amplifier is connected to the second end of the first voltage-dividing resistor, the reverse input end of the operational amplifier is connected to the second end of the second voltage-dividing resistor, the first end of the feedback resistor and the first end of the compensation capacitor, the second end of the feedback resistor is connected to the second end of the compensation capacitor, and the output end of the operational amplifier is connected thereto; The positive power supply end of the operational amplifier is connected to the first end of the second filter capacitor and the first end of the third filter capacitor, and the output end of the operational amplifier is connected to a power supply; the second end of the second filter capacitor is grounded, the second end of the third filter capacitor is grounded, and the negative power supply end of the operational amplifier is grounded.

7. A stall protection device for an automatic feeding apparatus according to claim 6, characterized in that The output unit comprises a second current-limiting resistor, a third current-limiting resistor, a fourth filter capacitor and a fifth filter capacitor, wherein: The first end of the second current-limiting resistor is connected to the output end of the operational amplifier, the second end of the second current-limiting resistor is connected to the first end of the third current-limiting resistor and the first end of the fourth filter capacitor, the second end of the third current-limiting resistor is connected to the first end of the fifth filter capacitor and the control module, the second end of the fourth filter capacitor is grounded, and the second end of the fifth filter capacitor is grounded.

8. The stall guard for an automatic feeding apparatus of claim 1, wherein, The position detection module comprises at least two photoelectric switches, and the two photoelectric switches are arranged at the starting position and the terminal position of the movement of the movement component, respectively; each photoelectric switch comprises a recess of an infrared emitting tube and an infrared receiving tube arranged oppositely.

9. An automatic feeding apparatus characterized by comprising: The automatic feeding device comprises at least a movement component and the stall protection device of the automatic feeding device according to any one of claims 1-8.

10. The automated feeding device of claim 9, wherein, The movement component is provided with a baffle, and the baffle passes through the position detection module when the movement component operates. The movement component is provided with a baffle, and the baffle passes through the position detection module when the movement component operates.

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