Unwinding guide device for yarn releasing creel of high-speed loom

Abstract

The invention relates to the technical field of textile processing, in particular to a high-speed loom yarn releasing creel unwinding guide device which comprises a guide ring and a yarn releasing creel, a transverse beam and a vertical beam are fixedly installed in the yarn releasing creel, a positioning mechanism used for fixing a yarn releasing roller is installed on the surface of the vertical beam, and the guide ring is arranged on the upper surface of the transverse beam. Dynamic stability of yarn ballooning in the high-speed unwinding process is achieved through the intelligent closed-loop control system. According to the system, a high-speed industrial camera, a tension sensor and a laser velocimeter are integrated, balloon diameter, tension and yarn speed data are collected in real time, and the distance between guide rings is accurately adjusted by a programmable logic controller based on a PID algorithm, so that the balloon is always maintained within an ideal diameter range. According to the method, the yarn shaking and end breakage rate is remarkably reduced, the weaving efficiency and the cloth cover quality are improved, meanwhile, the functions of overspeed braking and tension redundancy calibration are achieved, and the reliability and safety of high-speed operation are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of textile processing, in particular to an unwinding guide device for a yarn-releasing creel of a high-speed loom. Background Art

[0002] Unwinding is the process of continuously and evenly releasing yarn from a bobbin, tube, beam, or other package under external traction, in accordance with process requirements. In high-speed looms, unwinding typically occurs at the pay-off creel: the yarn is pulled from the surface of the stationary pay-off roller, gradually peeling off axially and forming a "balloon" under the action of centrifugal force. The yarn then enters the weaving system through guide rings, tension pulleys, and other devices. The quality of unwinding directly affects yarn tension stability, yarn breakage rate, and the final fabric quality.

[0003] During the unwinding process of traditional high-speed looms, if the balloon is too large, it will lead to increased friction between the yarn and surrounding components and sudden changes in tension, which will cause yarn breakage, hairiness and yarn winding around the roller. If the balloon is too small, the yarn will be over-tensioned, resulting in tensile deformation and reduced strength.

[0004] Existing technologies usually use fixed yarn guide rings or simple mechanical dampers to suppress balloons, but these devices have the following shortcomings: first, the position of the yarn guide ring is fixed and cannot respond to the dynamic changes of yarn tension and balloon diameter in real time; second, there is a lack of real-time monitoring of yarn speed. Once the speed is abnormal, the machine can only be shut down passively, which not only affects production capacity but also increases operational risks; third, the tension adjustment mechanism is mostly manual or semi-automatic, with low adjustment accuracy and delayed response, and it is difficult to adapt to the high-speed unwinding requirements of modern looms of more than 10,000 meters / hour. Therefore, there is an urgent need for an unwinding guide device that can monitor the balloon diameter, yarn tension and speed online in real time, and actively and accurately adjust the position of the yarn guide ring based on closed-loop control to solve the industry problems of unstable balloon, high breakage rate and large fluctuations in weaving quality during high-speed unwinding. Summary of the Invention

[0005] To achieve the above-mentioned object, the present invention proposes an unwinding guide device for a yarn placing frame of a high-speed loom, comprising a guide ring and a yarn placing frame, wherein a transverse beam and a vertical beam are fixedly mounted inside the yarn placing frame, respectively, a positioning mechanism for fixing a yarn placing roller is mounted on the surface of the vertical beam, the guide ring is arranged on the upper surface of the transverse beam, a mounting plate is fixedly connected to the upper surface of the transverse beam, a telescopic cylinder for driving the guide ring to move is fixedly connected to the upper surface of the mounting plate, and a control component for controlling the extension and retraction of the telescopic cylinder is mounted on the surface of the yarn placing frame; The control component includes a detection end and a data processing end. The detection end detects the state of the yarn during unwinding and transmits the detected data to the data processing end. The detection end includes a high-speed industrial camera, a micro tension sensor and a laser Doppler velocimeter. The data processing end includes a programmable logic controller. The upper surface of the transverse beam is fixedly connected to a vertical plate. The high-speed industrial camera and the laser Doppler velocimeter are both fixedly installed on the surface of the vertical plate. The micro tension sensor is fixedly installed on the upper surface of the mounting plate. An intelligent control cabinet is fixedly installed on the front of the yarn rack, and the programmable logic controller is installed inside the intelligent control cabinet.

[0006] In one example, the positioning mechanism includes a fixed shaft fixedly installed on the side of the vertical beam, and the central axis of the fixed shaft and the central axis of the guide ring are in the same straight line.

[0007] In one example, a T-shaped groove is opened on the surface of the fixed shaft, a T-shaped positioning bar is slidably connected to the inner wall of the T-shaped groove, and a reset spring is fixedly connected to the opposite surface of the T-shaped positioning bar and the T-shaped groove.

[0008] In one example, the vertical portion of the T-shaped positioning bar is trapezoidal in shape, and a rubber strip is embedded on the upper surface of the T-shaped positioning bar.

[0009] In one example, an adjustment mechanism is installed on the upper surface of the mounting plate, and the adjustment mechanism includes an adjustment seat fixedly installed on the upper surface of the mounting plate, a sliding groove is opened on the upper surface of the adjustment seat, and a movable seat is slidingly installed on the inner wall of the sliding groove, and a tension wheel is fixedly connected to the upper surface of the movable seat.

[0010] In one example, there are three tension wheels, which are distributed in a V shape. A sleeve is fixedly installed on the side of the adjustment seat surface away from the movable seat, and an adjustment rod is slidably installed on the inner wall of the sleeve. The adjustment rod extends to the inside of the slide groove and is fixedly connected to the surface of the movable seat. An adjustment spring is fixedly connected to the opposite surface of the adjustment rod and the sleeve.

[0011] In one example, the control logic executed within the programmable logic controller includes: The first step: data acquisition and preprocessing step, used to synchronously read the real-time balloon diameter, yarn tension value and yarn speed value; Step 2: Speed ​​safety priority monitoring is used to compare the real-time speed value with the speed safety threshold. If the threshold is exceeded, the air ring adjustment is immediately suspended and the braking command is triggered; Step 3: Closed-loop control of balloon stability, which is used to generate a control signal through a PID control algorithm based on the deviation between the balloon's real-time diameter and the preset target diameter; Step 4: Signal output and execution, which is used to convert the control signal into an analog output signal and send it to the electromagnetic proportional valve matched with the telescopic cylinder to accurately adjust the position of the guide ring; Step 5: Tension-assisted calibration and fault redundancy, used to switch to a control mode focused on tension maintenance when tension is abnormal or the high-speed industrial camera fails.

[0012] In one example, a touch-screen human-computer interaction interface is embedded on the surface of the intelligent control cabinet, which is communicated with the programmable logic controller and is used to display the balloon image, diameter, tension, speed data, current position of the cylinder and PID parameters in real time, and for the operator to set target parameters and view alarm information.

[0013] The unwinding guide device for the yarn unwinding frame of a high-speed loom proposed by the present invention can bring the following beneficial effects: 1. This invention achieves dynamic stabilization of the yarn balloon during high-speed unwinding through an intelligent closed-loop control system. The system integrates a high-speed industrial camera, a tension sensor, and a laser velocimeter to collect real-time data on balloon diameter, tension, and yarn speed. A programmable logic controller, using a PID algorithm, precisely adjusts the guide ring spacing to maintain the balloon within the ideal diameter range. This significantly reduces yarn vibration and breakage rates, improving weaving efficiency and fabric quality. Furthermore, the system incorporates overspeed braking and redundant tension calibration functions, ensuring reliable and safe high-speed operation.

[0014] 2. This invention enhances operational convenience and yarn protection through a collaborative design of mechanical and material components. The spring-driven T-shaped positioning bar and inclined guide structure on the fixed shaft enable quick insertion and removal of the yarn roller, as well as self-locking fixation, simplifying the replacement process. Both the guide ring and tension pulley are made of smooth ceramic, effectively reducing friction damage to the yarn. Combined with the V-shaped elastic tension pulley assembly, it can adaptively adjust yarn travel and tension fluctuations, further optimizing yarn output stability and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 A schematic structural diagram of a yarn unwinding guide device for a high-speed loom yarn creel from a first perspective; Figure 2 A high-speed loom yarn unwinding guide device Figure 1 A in the middle is an enlarged structural diagram; Figure 3 A schematic diagram of the internal structure of a sleeve of an unwinding guide device for a yarn creel of a high-speed loom; Figure 4 A high-speed loom yarn unwinding guide device Figure 1 The enlarged structural diagram at B in the middle; Figure 5 A schematic diagram of the internal structure of a fixed shaft of a yarn unwinding guide device for a high-speed loom; Figure 6 A schematic structural diagram from a second perspective of a yarn unwinding guide device for a high-speed loom; Figure 7 A high-speed loom yarn unwinding guide device Figure 6 The enlarged structural diagram at C in the middle; Figure 8 It is a flow chart of control logic executed inside the programmable logic controller.

[0016] The reference numerals are as follows: 1. Guide ring, 2. Yarn rack, 3. Horizontal beam, 4. Vertical beam, 5. Fixed shaft, 6. T-shaped positioning strip, 7. Return spring, 8. Mounting plate, 9. Telescopic cylinder, 10. Adjustment seat, 11. Tension wheel, 12. Moving seat, 13. Sleeve, 14. Adjustment rod, 15. Adjustment spring, 16. High-speed industrial camera, 17. Miniature tension sensor, 18. Laser Doppler velocimeter, 19. Intelligent control cabinet, 20. Programmable logic controller. DETAILED DESCRIPTION

[0017] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0018] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0019] 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 the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0020] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the descriptions with reference to the terms "one scheme", "some schemes", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more schemes or examples.

[0022] like Figures 1 to 8 As shown, the present invention proposes a yarn unwinding guide device for a high-speed loom yarn rack, comprising a guide ring 1, which is mounted on a yarn rack 2, and a positioning mechanism for fixing a yarn roller is mounted on the yarn rack 2. A transverse beam 3 and a vertical beam 4 are fixedly mounted on the yarn rack 2, respectively. The transverse beam 3 and the vertical beam 4 are respectively arranged on both sides of the yarn rack 2, the positioning mechanism is mounted on the vertical beam 4, and the guide ring 1 is mounted on the transverse beam 3 corresponding to the positioning mechanism.

[0023] The positioning mechanism includes a fixed shaft 5 fixedly mounted on the vertical beam 4, and a fixing mechanism is installed inside the fixed shaft 5. The diameter of the fixed shaft 5 is smaller than the inner diameter of the yarn putting roller on the market, so as to ensure that the yarn putting roller can be stably inserted on the fixed shaft 5. A T-shaped groove is provided on the surface of the fixed shaft 5, and a T-shaped positioning strip 6 that can be pressed against the inner wall of the yarn putting roller is installed inside the T-shaped groove. The T-shaped positioning strip 6 and the opposite surface of the T-shaped groove are fixedly connected with a reset spring 7. The elastic force of the reset spring 7 pushes the surface of the T-shaped positioning strip 6 to press against the inner wall of the yarn putting roller to fix the yarn putting roller. In order to increase the contact surface between the T-shaped positioning strip 6 and the yarn putting roller, the contact surface between the T-shaped positioning strip 6 and the yarn putting roller is an arc surface, and on the T-shaped positioning strip 6 After the yarn roller is fully inserted, the elastic force of the reset spring 7 pushes the T-shaped positioning strip 6 to squeeze the inner wall of the yarn roller for fixation.

[0024] The central axis of the guide ring 1 is in the same straight line as the central axis of the fixed shaft 5, thereby ensuring that the air ring generated when the yarn roller releases the yarn can form a relatively uniform ellipse with the guide hole of the guide ring 1, which is convenient for subsequent detection. The yarn on the yarn roller is passed through the guide hole of the guide ring 1. During the yarn release or unwinding process, the yarn will generate an air ring under the action of centrifugal force. The air ring is located between the yarn roller and the guide ring 1. The generation of the air ring is inevitable, but the distance between the guide ring 1 and the yarn roller can be controlled to control the length of the yarn when the air ring is formed, thereby controlling the size of the air ring. Therefore, a mounting plate 8 is fixedly installed on the upper surface of the transverse beam 3, and a telescopic cylinder 9 for moving the guide ring 1 is installed on the upper surface of the mounting plate 8. The telescopic end of the telescopic cylinder 9 is fixedly connected to the side of the guide ring 1. In order to ensure that the force of the guide ring 1 is stable when it is pushed, a telescopic cylinder 9 is installed at the symmetrical position on the side of the guide ring 1.

[0025] In addition, an adjustment mechanism for tension adjustment is installed on the upper surface of the mounting plate 8, and the adjustment mechanism includes an adjustment seat 10 fixedly mounted on the upper surface of the mounting plate 8. Three tension wheels 11 are slidably mounted on the upper surface of the adjustment seat 10, and a wire groove is provided on the surface of the tension wheel 11. The three tension wheels 11 move autonomously when the yarn is relaxed, adjust the spacing, increase the length of the yarn in the tension wheel 11, or reduce the length of the yarn in the tension wheel 11, thereby achieving the function of controlling the tension. In order to achieve autonomous adjustment of the tension wheel 11, a slide groove is provided on the upper surface of the adjustment seat 10, and a moving seat 12 is slidably mounted on the inner wall of the slide groove. The tension wheel 11 is mounted on the upper surface of the moving seat 12. The material of the tension wheel 11 and the guide ring 1 are both ceramic and have a smooth surface. The smooth surface can avoid excessive friction of the yarn.

[0026] The three tension wheels 11 are distributed in a V shape, and a sleeve 13 is fixedly installed on the side of the adjustment seat 10 away from the movable seat 12. An adjusting rod 14 is slidably installed on the inner wall of the sleeve 13. The adjusting rod 14 extends to the inside of the slide groove and is fixedly connected to the surface of the movable seat 12. An adjusting spring 15 is fixedly installed between the adjusting rod 14 and the sleeve 13, and the yarn is also distributed in a V shape and close to the tension wheel 11. When unwinding, the yarn will push the tension wheel 11 to move in a normal state, so that the V shape will expand. When the yarn feeding speed slows down, the elastic force of the adjusting spring 15 will push the tension wheel 11 to move, reduce the V-shaped angle, increase the stroke, and ensure that the yarn is in a normal state.

[0027] In order to achieve automatic adjustment of the guide ring 1, that is, automatically adjust the telescopic cylinder 9 and adjust the position of the guide ring 1, a control component for controlling the telescopic cylinder 9 is installed on the yarn release frame 2, and the control component includes a high-speed industrial camera 16 fixedly installed on the side of the yarn path between the guide ring 1 and the yarn release roller. The high-speed industrial camera 16 is used to collect images of the yarn balloon in real time and calculate the real-time diameter and stability of the balloon through an image processing algorithm. A micro tension sensor 17 is installed on the yarn path on the outlet side of the guide ring 1. The micro tension sensor 17 is used to monitor the tension changes of the yarn in real time. A laser Doppler velocimeter 18 is installed above the yarn path. The laser emission head of the laser Doppler velocimeter 18 is set facing the yarn for direct non-contact measurement of the running speed of the yarn. An intelligent control cabinet 19 is fixedly installed on the front of the yarn release frame 2, and a programmable logic controller 20 is fixedly installed inside the intelligent control cabinet 19. The high-speed industrial camera 16, the micro tension sensor 17 and the laser Doppler velocimeter 18 are all electrically connected to the input end of the programmable logic controller 20.

[0028] The high-speed industrial camera 16 monitors the balloon diameter in real time, the micro tension sensor 17 detects the yarn tension, and the laser Doppler velocimeter 18 obtains the yarn speed. The three data are synchronously sent to the programmable logic controller 20. The controller first determines whether the speed exceeds the limit. If so, it brakes immediately. Under normal circumstances, the balloon diameter deviation is converted into an analog instruction to drive the electromagnetic proportional valve according to the PID algorithm, and the telescopic cylinder 9 is accurately controlled to adjust the distance between the guide ring 1 and the yarn roller to keep the balloon at the set diameter. The tension data is also used as redundant calibration. When the visual signal is lost, the tension mode can be automatically switched, so as to continuously obtain yarn output with stable diameter, uniform tension and safe speed during high-speed unwinding, significantly reducing end breakage, improving weaving efficiency and cloth quality.

[0029] The core control logic executed within the programmable logic controller 20 is as follows: Step 1: Data collection and preprocessing The programmable logic controller 20 synchronously reads the balloon real-time diameter value (D_actual) from the high-speed industrial camera 16, the real-time tension value (T_actual) from the micro tension sensor 17, and the real-time yarn speed value (V_actual) from the laser Doppler velocimeter 18 at a fixed scanning cycle.

[0030] Step 2: Speed ​​and safety priority monitoring The programmable logic controller 20 compares V_actual with the internally stored speed safety threshold (V_max). This is the highest priority control loop. Once it detects that V_actual>V_max, the programmable logic controller 20 will immediately suspend all balloon adjustment commands and send the highest priority braking command to the auxiliary drive device or brake of the yarn roller to force deceleration. At the same time, it triggers an overspeed alarm on the human-machine interface. This process bypasses the cylinder control until the speed returns to normal.

[0031] Step 3: Closed-loop control of balloon stability When the speed is within the safe range, the system enters the balloon stability control mode. The programmable logic controller 20 compares the actual balloon diameter (D_actual) with the preset ideal balloon target diameter (D_target) and calculates the diameter deviation (e=D_actual-D_target).

[0032] The deviation signal e is calculated by the built-in digital PID control algorithm, and finally generates an analog output signal for controlling the telescopic cylinder 9. The specific control strategy is: Proportional control: Outputs a control value proportional to the current deviation value e. For example, if the balloon suddenly increases significantly and e is positive, the proportional control will immediately output a strong command to quickly extend the telescopic cylinder 9 to reduce the distance between the guide ring 1 and the yarn roller, thereby quickly suppressing the expansion of the balloon.

[0033] Integral control: Outputs a control variable proportional to the integral of the deviation (i.e., the accumulated deviation over a period of time). This control is used to eliminate static errors. For example, if a small, persistent deviation persists even when the air ring size is close to the target value, integral control gradually increases the output, causing the cylinder to move slowly until the deviation is completely eliminated.

[0034] Differential control: Outputs a control variable proportional to the rate of change of the deviation (i.e., the speed at which the deviation changes). This control is predictive. For example, if the balloon is detected to be rapidly expanding (e is positive and the rate of change is high), differential control will output a proactive correction signal before the deviation becomes significant, commanding the cylinder to extend prematurely, effectively suppressing balloon oscillation and improving system stability.

[0035] The output result of the PID algorithm is converted into a corresponding 4-20mA or 0-10V analog signal through the analog output module of the programmable logic controller 20.

[0036] Step 4: Signal output and execution This analog signal is sent to the electromagnetic proportional valve (not a simple on-off solenoid valve) that is matched with the telescopic cylinder 9. The proportional valve will accurately and continuously adjust the flow and direction of the compressed air according to the size of the received current or voltage signal.

[0037] When the control algorithm calculates that the diameter of the air ring needs to be reduced: the output signal increases, driving the proportional valve to extend the cylinder and reduce the gap.

[0038] When the control algorithm calculates that the diameter of the air ring needs to be increased: the output signal decreases, driving the proportional valve to retract the cylinder and increase the spacing.

[0039] The size of the signal directly determines the "speed" and "force" of the cylinder's extension and contraction, thereby achieving smooth and precise point control rather than abrupt extension and contraction, avoiding secondary disturbance of the yarn.

[0040] Step 5: Tension-assisted calibration and fault redundancy The data (T_actual) from the micro-tension sensor 17 is used as an auxiliary calibration for the balloon vision control. The programmable logic controller 20 continuously compares T_actual with the upper and lower tension limits (T_max, T_min). If the system detects that the balloon diameter is within the target range but the tension is abnormally exceeded, or if the high-speed industrial camera 16 temporarily fails, it can automatically switch to a control mode that focuses on tension maintenance. The tension value is used to reversely infer and adjust the cylinder position, serving as an important fault redundancy backup.

[0041] The surface of the intelligent control cabinet 19 is embedded with a touch-type human-machine interaction interface, which is communicated with the programmable logic controller 20 and is used to display the balloon image, diameter, tension, speed data, current position of the cylinder and PID parameters in real time, and allows the operator to set D_target, V_max, PID parameters, etc. and view alarm information.

[0042] The present invention provides a high-speed loom unwinding guide device for a yarn-laying creel. Through the deep integration of mechanical structure and intelligent control systems, it achieves active and stable control of the yarn balloon, adaptive tension adjustment, and safe operating speed monitoring during high-speed unwinding. Its core features are the use of multiple sensors (a high-speed industrial camera 16, a micro-tension sensor 17, and a laser Doppler velocimeter 18) to collect yarn status in real time. A programmable logic controller 20 implements closed-loop regulation of the balloon diameter based on a PID algorithm. This is supplemented by redundant tension calibration and an overspeed emergency braking function. Ultimately, this significantly improves the stability and reliability of yarn unwinding under high-speed and high-frequency operating conditions.

[0043] This device not only effectively prevents problems such as end breakage and roller entanglement caused by excessive balloon size or vibration, thereby improving weaving efficiency and fabric quality, but also enables parameter setting, status visualization, and fault reporting through a human-machine interactive interface, providing key technical support for the efficient and intelligent operation of modern looms. Its systematic design approach and reliable control logic have positive promotional value for the automation upgrade of textile equipment.

[0044] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0045] The foregoing is merely an embodiment of the present invention and is not intended to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A high-speed loom yarn unwinding guide device comprising a guide ring (1) and a yarn unwinding frame (2), characterized in that: The inside of the yarn placing frame (2) is fixedly mounted with a transverse beam (3) and a vertical beam (4), a positioning mechanism for fixing the yarn placing roller is mounted on the surface of the vertical beam (4), a guide ring (1) is arranged on the upper surface of the transverse beam (3), a mounting plate (8) is fixedly connected to the upper surface of the transverse beam (3), a telescopic cylinder (9) for driving the guide ring (1) to move is fixedly connected to the upper surface of the mounting plate (8), and a control component for controlling the telescopic cylinder (9) to extend and retract is mounted on the surface of the yarn placing frame (2); The control component includes a detection end and a data processing end. The detection end detects the state of the yarn during unwinding and transmits the detected data to the data processing end. The detection end includes a high-speed industrial camera (16), a micro tension sensor (17) and a laser Doppler velocimeter (18). The data processing end includes a programmable logic controller (20). The upper surface of the transverse beam (3) is fixedly connected to a vertical plate. The high-speed industrial camera (16) and the laser Doppler velocimeter (18) are both fixedly mounted on the surface of the vertical plate. The micro tension sensor (17) is fixedly mounted on the upper surface of the mounting plate (8). An intelligent control cabinet (19) is fixedly mounted on the front of the yarn rack (2). The programmable logic controller (20) is mounted inside the intelligent control cabinet (19).

2. The unwinding guide device for a yarn creel of a high-speed loom according to claim 1, characterized in that: The positioning mechanism comprises a fixed shaft (5) fixedly mounted on the side of the vertical beam (4), wherein the central axis of the fixed shaft (5) and the central axis of the guide ring (1) are in the same straight line.

3. The unwinding guide device for a yarn creel of a high-speed loom according to claim 2, characterized in that: A T-shaped groove is provided on the surface of the fixed shaft (5), a T-shaped positioning strip (6) is slidably connected to the inner wall of the T-shaped groove, and a reset spring (7) is fixedly connected to the opposite surface of the T-shaped positioning strip (6) and the T-shaped groove.

4. The unwinding guide device for a yarn creel of a high-speed loom according to claim 3, characterized in that: The vertical portion of the T-shaped positioning strip (6) is in the shape of a trapezoid, and a rubber strip is embedded on the upper surface of the T-shaped positioning strip (6).

5. The unwinding guide device for a yarn creel of a high-speed loom according to claim 1, characterized in that: An adjustment mechanism is installed on the upper surface of the mounting plate (8), and the adjustment mechanism includes an adjustment seat (10) fixedly installed on the upper surface of the mounting plate (8), a slide groove is provided on the upper surface of the adjustment seat (10), a movable seat (12) is slidably installed on the inner wall of the slide groove, and a tension wheel (11) is fixedly connected to the upper surface of the movable seat (12).

6. The unwinding guide device for a yarn creel of a high-speed loom according to claim 5, characterized in that: The number of the tension wheels (11) is three, and the three tension wheels (11) are distributed in a V-shape. A sleeve (13) is fixedly installed on the side of the surface of the adjustment seat (10) away from the movable seat (12). An adjustment rod (14) is slidably installed on the inner wall of the sleeve (13). The adjustment rod (14) extends to the inside of the slide groove and is fixedly connected to the surface of the movable seat (12). An adjustment spring (15) is fixedly connected to the opposite surface of the adjustment rod (14) and the sleeve (13).

7. The unwinding guide device for a yarn creel of a high-speed loom according to claim 1, characterized in that: The control logic executed inside the programmable logic controller (20) includes: The first step: data acquisition and preprocessing step, used to synchronously read the real-time balloon diameter, yarn tension value and yarn speed value; Step 2: Speed ​​safety priority monitoring is used to compare the real-time speed value with the speed safety threshold. If the threshold is exceeded, the air ring adjustment is immediately suspended and the braking command is triggered; Step 3: Closed-loop control of balloon stability, which is used to generate a control signal through a PID control algorithm based on the deviation between the balloon's real-time diameter and the preset target diameter; Step 4: Signal output and execution, used to convert the control signal into an analog output signal and send it to the electromagnetic proportional valve matched with the telescopic cylinder (9) to accurately adjust the position of the guide ring (1); Step 5: Tension-assisted calibration and fault redundancy, which is used to switch to a control mode based on tension maintenance when the tension is abnormal or the high-speed industrial camera (16) fails.

8. The unwinding guide device for a yarn creel of a high-speed loom according to claim 7, characterized in that: The surface of the intelligent control cabinet (19) is embedded with a touch-type human-machine interaction interface, which is in communication with the programmable logic controller (20) and is used to display the balloon image, diameter, tension, speed data, current position of the cylinder and PID parameters in real time, and to allow the operator to set target parameters and view alarm information.

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