A winding machine swing arm control device

Abstract

This utility model discloses a swing arm control device for a winding machine, comprising: a swing arm signal processing unit for receiving voltage signals from sensors located at the swing arm and feeding these signals back to a main control CPU processor; a main control CPU processor for determining whether the swing arm is in a normal operating position based on the feedback signal; if it deviates from the normal operating position, the main control CPU processor sends a control signal to a power transistor pre-drive output unit; a power transistor pre-drive output unit for amplifying and converting the low-level control signal into a drive signal for operation; and a brushless motor power transistor drive unit for adjusting the motor speed of the winding machine by changing the conduction time of the power transistor after receiving the drive signal, thereby returning the swing arm to the normal operating position. This utility model achieves stable speed operation of the winding machine and reduces the yarn scrap rate.

Description

Technical Field

[0001] This utility model relates to the field of winding equipment control technology, and in particular to a winding machine swing arm control device. Background Technology

[0002] In industries such as textiles and cables, winding machines are core equipment in the production process of yarn products. Their primary requirement is to ensure stable yarn tension and uniform winding speed during the winding process. If the tension is too loose, the yarn is prone to tangling and unraveling; if the tension is too tight, the yarn is easily broken or deformed, both of which significantly increase the scrap rate. To achieve tension control, existing winding machines generally monitor and adjust yarn tension using a swing arm. When the tension is too low, the swing arm deflects downwards; when the tension is too high, the swing arm deflects upwards. However, existing control schemes have many technical flaws and cannot meet the demands of high-precision, automated production, as detailed below: In small- to medium-scale production, existing winding machines still require operators to monitor the position of the swing arm in real time. When the swing arm is found to be falling downwards, the motor speed is manually increased; when the swing arm is found to be tilting upwards, the speed is manually decreased. This manual judgment and adjustment mode has two major problems: firstly, the response speed is slow, and secondly, the human error is large. Especially in 24-hour continuous production scenarios, the scrap rate fluctuates greatly, which seriously affects production efficiency and product quality.

[0003] In some existing devices for processing pendulum signals, the voltage signal output by the pendulum sensor is often directly transmitted to the control unit, lacking a dedicated signal processing unit. Due to interference sources such as electromagnetic interference from motors and mechanical vibrations in the winding machine's working environment, the unprocessed voltage signal is prone to noise superposition and signal drift. For example, if the pendulum has already shifted downwards due to insufficient tension, the voltage signal output by the sensor should decrease, but after interference, the signal remains at a normal value. This causes the control unit to be unable to accurately identify the actual position of the pendulum, resulting in subsequent speed adjustments deviating completely from requirements, persistently abnormal yarn winding tension, and ultimately, defective products. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies in monitoring and controlling the swing arm of a winding machine, which makes it difficult to meet the needs of high-precision and automated production, resulting in a high scrap rate of wound yarn. This invention provides a swing arm control device for a winding machine, which transmits sensor voltage signals to the main control CPU through the swing arm signal processing unit. If the swing arm deviates from the normal position, a signal is sent to the pre-drive unit, which amplifies the signal and drives the power transistor to adjust the motor speed, so that the swing arm returns to its original position, allowing the winding machine to run at a stable speed and reducing the scrap rate of the yarn.

[0005] The objective of this utility model is achieved through the following technical solution: A winding machine swing arm control device, comprising: The pendulum signal processing unit is used to receive the voltage signal emitted by the sensor set at the pendulum and feed the voltage signal back to the main control CPU processor. The sensor is used to determine the real-time position of the pendulum. The main control CPU processor is used to receive feedback signals from the swing arm signal processing unit and determine whether the swing arm is in the normal working position based on the feedback signals. If it deviates from the normal working position, the main control CPU processor sends a control signal to the power tube pre-drive output unit. The power transistor pre-drive output unit is used to receive control signals sent by the main control CPU processor and amplify and convert the low-level control signals into drive signals for the operation of the power transistor pre-drive output unit. The brushless motor power transistor drive unit, upon receiving a drive signal, adjusts the motor speed of the winding machine by changing the conduction time of the power transistor, thereby returning the swing arm to its normal working position.

[0006] Preferably, the winding machine swing arm control device also includes: The start-up unit is used to output a power enable signal to the main control CPU processor to ensure that each module of the winding machine swing arm control device completes reset and initialization. The back EMF acquisition and processing unit is used to acquire the signal of the brushless motor winding connected to the brushless motor power transistor drive unit, and to provide starting parameters for the starting unit.

[0007] Preferably, the winding machine swing arm control device also includes: The Hall commutation signal processing unit is used to acquire the phase signal output by the Hall sensor at the rotor of the brushless motor and feed it back to the main control CPU processor.

[0008] Preferably, the winding machine swing arm control device also includes: The first step-down unit is used to reduce the bus voltage to a first voltage, which is the voltage required for the operation of the power transistor and the drive output unit. The second buck unit is used to reduce the first voltage to a second voltage, which is the voltage required for the main control CPU processor to operate.

[0009] Preferably, the bus voltage is 48V, the first voltage is 15V, and the second voltage is 5V.

[0010] Preferably, the sensor is a potentiometer displacement sensor, in which the slider of the potentiometer displacement sensor is moved by the mechanical displacement of the lever, thereby changing the voltage division ratio of the resistor and thus changing the output voltage value.

[0011] Preferably, the sensor is a Hall sensor, which converts the change in magnetic field caused by the mechanical displacement of the pendulum into a change in voltage, thereby changing the output voltage value.

[0012] The beneficial effects of this utility model are: This utility model uses closed-loop control of the swing arm signal processing unit, the main control CPU processor, the power tube pre-drive output unit and the brushless motor power tube drive unit to adjust the motor speed in real time to make the swing arm return to the center, solve the problem of insufficient swing arm monitoring and control, realize the steady speed operation of the winding machine and reduce the scrap rate of the yarn.

[0013] In this solution, the starting unit ensures the reset and initialization of each module, while the back EMF acquisition and calculation unit provides starting parameters to stabilize the motor startup and prevent abnormal yarn tension caused by speed fluctuations during the startup phase. The Hall commutation signal processing unit can feed back the motor rotor phase signal, assisting the main control CPU processor in accurately controlling the motor commutation, further improving the stability of the motor speed and ensuring winding quality. The first and second step-down modules adapt to the voltage requirements of different modules, ensuring stable operation of each unit and preventing voltage instability from affecting control accuracy. The potentiometer displacement sensor or Hall sensor can be flexibly adapted and selected according to the winding conditions, improving the applicability of the device to different yarn winding scenarios. Attached Figure Description

[0014] Figure 1 This is a circuit diagram of the present invention. Figure 2 This is a specific circuit diagram of this utility model; Figure 3 This is the circuit diagram of the first step-down unit of this utility model; Figure 4 This is the circuit diagram of the second step-down unit of this utility model; The components include: 1. a swing arm signal processing unit; 2. a main control CPU processor; 3. a power transistor pre-drive output unit; 4. a brushless motor power transistor drive unit; 5. a start-up unit; 6. a back EMF acquisition and calculation unit; and 7. a Hall commutation signal processing unit. Detailed Implementation

[0015] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0016] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0017] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0018] Example 1: A winding machine swing arm control device, such as Figure 1 , Figure 2 As shown, it includes: The pendulum signal processing unit 1 is used to receive the voltage signal emitted by the sensor installed at the pendulum and feed the voltage signal back to the main control CPU processor. The sensor is used to determine the real-time position of the pendulum. The main control CPU processor 2 is used to receive feedback signals from the swing arm signal processing unit and determine whether the swing arm is in the normal working position based on the feedback signals. If it deviates from the normal working position, the main control CPU processor sends a control signal to the power tube pre-drive output unit. The power transistor pre-drive output unit 3 is used to receive control signals sent by the main control CPU processor and amplify and convert the low-level control signals into drive signals for the operation of the power transistor pre-drive output unit. After receiving the drive signal, the brushless motor power tube drive unit 4 adjusts the motor speed of the winding machine by changing the conduction time of the power tube, and the swing arm returns to the normal working position by adjusting the speed of the brushless motor of the winding machine. Start-up unit 5 is used to output a power enable signal to the main control CPU processor to ensure that each module of the winding machine swing arm control device completes reset and initialization. The back EMF acquisition and processing unit 6 is used to acquire the signal of the brushless motor winding connected to the brushless motor power tube drive unit, and to provide starting parameters for the starting unit. The Hall commutation signal processing unit 7 is used to acquire the phase signal output by the Hall sensor at the rotor of the brushless motor and feed it back to the main control CPU processor. The first step-down unit, such as Figure 3As shown, this is used to reduce the bus voltage to a first voltage, which is the voltage required for the power transistor and the drive output unit to operate. The second step-down unit, such as Figure 4 As shown, this is used to reduce the first voltage to the second voltage, which is the voltage required for the main control CPU processor to operate.

[0019] The bus voltage is 48V, the first voltage is 15V, and the second voltage is 5V.

[0020] The sensor is a potentiometer displacement sensor. The slider of the potentiometer displacement sensor moves due to the mechanical displacement of the lever, thereby changing the voltage division ratio of the resistor and thus changing the output voltage value.

[0021] Specifically, the rocker arm signal processing unit includes a 5-pin connector P2 and a signal conditioning circuit. Pin 1 of P2 is connected to the power supply VCC, pin 5 is grounded, pin 2 is connected to the VR pin of the main control CPU processor U2 through the signal conditioning circuit, and pin 3 is connected to the FG pin of the main control CPU processor U2. The signal conditioning circuit includes resistors R5, R6, and R7 and capacitor C6. Pins AB of the main control CPU processor U2 are connected to pins AB of the driver chip U1 of the power transistor pre-drive output unit. Pins BB of the main control CPU processor U2 are connected to pins BB of the driver chip U1. Pins CB of the main control CPU processor U2 are connected to pins CB of the driver chip U1. Pins AT of the main control CPU processor U2 are connected to pins AT of the driver chip U1. Pins BT of the main control CPU processor U2 are connected to pins BT of the driver chip U1. Pins CT of the main control CPU processor U2 are connected to pins CT of the driver chip U1. The brushless motor power transistor drive unit includes six power transistors Q1-Q6, adapted to the three-phase winding structure of the three-phase brushless motor (U, V, W), enabling bidirectional current and timing control of each winding group to ensure continuous and stable rotor rotation. The back EMF acquisition and processing unit includes resistors R17, R18, R22, R23, R24, R25, R26, R29, R30, R31, and capacitors C18, C19, and C20. It acquires the brushless motor winding signals to provide starting parameters for the starting unit. These brushless motor winding signals are provided by connector J1 of the brushless motor power transistor drive unit. The startup unit includes a startup chip U3. Pin OUT1 of startup chip U3 is connected to pin HA of the main control CPU processor U2, and pin OUT2 of startup chip U3 is connected to pin HB of the main control CPU processor U2. Pins IN1+, IN1-, IN2+, IN2-, IN3+, and IN3- of startup chip U3 are all connected to the back EMF acquisition and processing unit. The first buck unit includes a buck chip U4 and its voltage regulation and filtering circuit, and the second buck unit includes a buck chip VR1 and its voltage regulation and filtering circuit. The main control CPU processor U2 is model CK3364N, the driver chip U1 is model CK5G14, the startup chip U3 is model LM339, the power transistor is model AON6512, the buck chip U4 is model XL7005, and the buck chip VR1 is model LM78L05.

[0022] When the winding machine swing arm control device is started, the starting unit first outputs a power supply enable signal to the main control CPU processor U2 to ensure that each module of the device completes the reset and initialization; at the same time, the back electromotive force acquisition and calculation unit acquires the motor winding signal connected to the brushless motor power tube drive unit to provide the starting unit with motor starting parameters to ensure the smooth start of the brushless motor.

[0023] During normal operation, the potentiometer displacement sensor at the swing arm monitors the swing arm's position in real time: if the swing arm falls downwards due to insufficient winding tension, the sensor's mechanical displacement causes the output voltage signal to be low; if the swing arm tilts upwards due to excessive tension, the sensor's output voltage signal is high. This voltage signal is first transmitted to the swing arm signal processing unit, conditioned, and then fed back to the main control CPU processor U2.

[0024] After receiving the feedback signal, the main control CPU processor U2 determines whether the swing arm has deviated from the middle equilibrium position. If the signal is too low and the swing arm drops, the CPU immediately sends a low-level control signal to the power transistor pre-drive output unit. The pre-drive unit amplifies the low-level signal to a signal that meets the power transistor drive requirements and transmits it to the brushless motor power transistor drive unit. By increasing the power transistor conduction time, the brushless motor speed is increased, which drives the winding shaft to accelerate winding and increases the tension so that the swing arm rises back to the equilibrium position.

[0025] If the sensor signal is too high and the swing arm tilts upward, the main control CPU processor U2 adjusts the control signal. Through the pre-drive unit, it reduces the power transistor drive signal strength, shortens the power transistor's conduction time, reduces the brushless motor speed, and weakens the winding tension, causing the swing arm to fall back. Simultaneously, the Hall commutation signal processing unit collects the phase signal from the motor rotor Hall sensor and feeds it back to the CPU. Combined with the stable power supply from the first and second step-down units, this ensures the continuous operation of the entire control loop, maintaining a steady speed for the winding machine and preventing defective yarn products due to abnormal tension.

[0026] Example 2: A winding machine swing arm control device, the principle and implementation method of which are basically the same as those of Example 1, the difference being that the sensor is a Hall sensor, which converts the change in magnetic field caused by the mechanical displacement of the swing arm into a change in voltage, thereby changing the output voltage value.

[0027] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0028] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A reel swing lever control device characterized by, include: The pendulum signal processing unit is used to receive the voltage signal emitted by the sensor set at the pendulum and feed the voltage signal back to the main control CPU processor. The sensor is used to determine the real-time position of the pendulum. The main control CPU processor is used to receive feedback signals from the swing arm signal processing unit and determine whether the swing arm is in the normal working position based on the feedback signals. If it deviates from the normal working position, the main control CPU processor sends a control signal to the power tube pre-drive output unit. The power transistor pre-drive output unit is used to receive control signals sent by the main control CPU processor and amplify and convert the low-level control signals into drive signals for the operation of the power transistor pre-drive output unit. The brushless motor power transistor drive unit, upon receiving a drive signal, adjusts the motor speed of the winding machine by changing the conduction time of the power transistor, thereby returning the swing arm to its normal working position.

2. A control device for a swing lever of a winding machine according to claim 1, further comprising include: The start-up unit is used to output a power enable signal to the main control CPU processor to ensure that each module of the winding machine swing arm control device completes reset and initialization. The back EMF acquisition and processing unit is used to acquire the signal of the brushless motor winding connected to the brushless motor power transistor drive unit, and to provide starting parameters for the starting unit.

3. A control device for a swing lever of a winding machine according to claim 1 or 2, further comprising include: The Hall commutation signal processing unit is used to acquire the phase signal output by the Hall sensor at the rotor of the brushless motor and feed it back to the main control CPU processor.

4. The control device for a dancer bar of a winder according to claim 1, further comprising include: The first step-down unit is used to reduce the bus voltage to a first voltage, which is the voltage required for the operation of the power transistor and the drive output unit. The second buck unit is used to reduce the first voltage to a second voltage, which is the voltage required for the main control CPU processor to operate.

5. A control device for a roll pendulum of a winding machine according to claim 4, characterized in that The bus voltage is 48V, the first voltage is 15V, and the second voltage is 5V.

6. A control device for a roll pendulum of a winding machine according to claim 1, characterized in that The sensor is a potentiometer displacement sensor. The slider of the potentiometer displacement sensor moves due to the mechanical displacement of the lever, thereby changing the voltage division ratio of the resistor and thus changing the output voltage value.

7. The winding machine swing arm control device according to claim 1, characterized in that, The sensor is a Hall sensor, which converts the change in magnetic field caused by the mechanical displacement of the pendulum into a change in voltage, thereby changing the output voltage value.

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