Method for detecting and adjusting balloon size

Abstract

According to the method for detecting and adjusting the size of the balloon, a photoelectric emission head and a photoelectric receiving head which are arranged on the two sides of a spindle tank respectively are included, and a detection light beam between the photoelectric emission head and the photoelectric receiving head is arranged at the tangent position when the circumcircle of the yarn balloon and the spindle tank are located at a proper distance; the detection light beam is a light beam with a certain width or diameter, when the yarn ballooning shields the detection light beam to influence the illumination intensity at the receiving end, the photoelectric receiving head judges the size of the yarn ballooning by detecting a signal generated by the change of the illumination intensity, and the size of the yarn ballooning is compared with a preset yarn ballooning parameter; whether the size of the current yarn ballooning meets the set requirement or not is judged; if the diameter of the circumcircle of the yarn balloon is larger than a preset yarn balloon parameter, the outer yarn tension starts to be increased, and if the diameter of the circumcircle of the yarn balloon is smaller than the preset yarn balloon parameter, the outer yarn tension starts to be reduced. The detection light beam has enough width, signals can be generated according to the illumination intensity, and the diameter of the yarn balloon is obtained.

Description

Technical Field

[0001] The invention relates to the field of twisting machine control, in particular to a method for detecting and adjusting the size of a balloon. Background Art

[0002] The yarn of the twisting machine is driven by the twisting component to rotate at 4000-12000 rpm outside the spindle tank to form a balloon. The size of the balloon has a great influence on energy consumption and finished product quality. An overly large balloon diameter causes a sharp increase in the energy consumption of the twisting machine, which can increase energy consumption by up to 30%. An overly large balloon may touch the wallboard or yarn separator, etc., resulting in increased yarn strength loss or even yarn breakage; while an overly small balloon will cause the yarn to rub against the spindle tank, causing hair and yarn breakage, affecting the quality of the finished product and the full spindle rate of the equipment. Maintaining the stability of the balloon shape is a necessary condition to ensure the normal production of the twisting machine.

[0003] The balloon of the yarn refers to the virtual curved sphere that is externally connected to the outer yarn during its rotation. The tension controller is a mechanism that uses magnetic force or electric force through a friction device to control the yarn tension. Overfeeding is a yarn feeding device used in production fields such as spinning and twisting. The yarn is wound on an overfeed roller with a specially treated surface. The overfeed roller is rotated by a transmission device to transport the yarn to the wire arrangement device, which then winds the yarn onto a yarn drum driven to rotate by the winding roller of the winding device. Chinese Patent 201910712746.8 records a device and method for detecting the distance from the balloon to the spindle tank. The distance from the yarn balloon to the spindle tank is detected by detecting the pulses generated by the yarn cutting light beam. The problem with this solution is that the adjustment of the yarn balloon is prone to repeated overshoot due to system delays, such as Figures 5-6 shown. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for detecting and adjusting the size of a balloon, which can smoothly control the size of the balloon and adjust the size of the balloon without affecting production efficiency.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a method for detecting and adjusting the size of the balloon, comprising a photoelectric transmitter and a photoelectric receiver respectively arranged on both sides of the spindle tank, the detection light beam between the photoelectric transmitter and the photoelectric receiver is arranged at a position where the circumscribed circle of the yarn balloon is tangent to the spindle tank when the distance is appropriate, the detection light beam is a light beam with a certain width or diameter, when the yarn balloon blocks the detection light beam and thus affects the light intensity at the receiving end, the photoelectric receiver determines the size of the yarn balloon by detecting the signal generated by the change in light intensity, and compares it with the preset yarn balloon parameters to determine whether the current size of the yarn balloon meets the set requirements;

[0006] If the diameter of the circumscribed circle of the yarn balloon is greater than the preset yarn balloon parameter, the outer yarn tension begins to increase; if the diameter of the circumscribed circle of the yarn balloon is less than the preset yarn balloon parameter, the outer yarn tension begins to decrease.

[0007] In a preferred embodiment, the detection beam is a parallel light band, the cross section of the detection beam is rectangular or circular, and the width or diameter of the cross section of the detection beam is 0.5 to 10 mm;

[0008] The maximum rotation angle corresponding to the tangent intersection point of the detection light beam and the yarn balloon is less than 90°.

[0009] In a preferred solution, an aperture is provided in the optical path of the photoelectric emitter head to adjust the width or diameter of the detection light beam.

[0010] In the preferred scheme, the spindle motor rotates one circle as a cycle. When there is no detection signal within a cycle, full speed adjustment is required to increase the diameter of the yarn balloon. When there are two detection signals within a cycle, full speed adjustment is required to reduce the diameter of the yarn balloon. When there is only one detection signal T, the duration of the detection signal T is recorded, and the diameter of the yarn balloon is calculated based on the angle parameter corresponding to the duration T of the detection signal. PID control is performed according to the size of the balloon to obtain a smooth adjustment curve.

[0011] In the preferred scheme, when the yarn balloon begins to cut the detection beam and the light intensity received by the photoelectric receiving head becomes weaker, the duration of the current light intensity signal starts to be counted; when the yarn balloon rotates away from the detection beam, the light intensity received by the photoelectric receiving head is restored and the timing of the photoelectric receiving head ends.

[0012] In the preferred solution, the calculation formula for the yarn balloon size is:

[0013]

[0014] cos(α+β)=L1 / R Formula 2;

[0015]

[0016] When the speed of the motor driving the yarn is n, we have:

[0017] T / n=α / 2πFormula 4;

[0018] Right now:

[0019] α=2πT / nFormula 5;

[0020] Therefore:

[0021]

[0022] In the above formula, L1 is the distance from the edge of the detection beam to the center of the spindle tank, L2 is the detection beam width or diameter, R is the balloon diameter, T is the duration of the detection signal, α is the corresponding angle when the yarn balloon blocks the detection beam, and β is 1 / 2 of the corresponding angle between the intersection of the yarn balloon and the detection beam when the detection beam is not blocked;

[0023] The size of the yarn balloon is calculated by the above mathematical formula, and the photoelectric receiving head determines whether the size of the yarn balloon is appropriate at this time.

[0024] In a preferred embodiment, the detection light beam is tilted compared to the axis of the spindle pot so that the detection light beam is nearly perpendicular to the rotating outer yarn.

[0025] In the preferred solution, a main control device is also provided, which is electrically connected to the photoelectric transmitter and the photoelectric receiver, and supplies power to the photoelectric transmitter and the photoelectric receiver, and receives the signal sent by the photoelectric receiver;

[0026] The main control device timely adjusts the tension of the yarn balloon by controlling the tension controller.

[0027] The method for detecting and adjusting the size of the air ring provided by the present invention has the following beneficial effects by adopting the above scheme:

[0028] 1. The present invention shapes the light source so that the photoelectric transmitter emits a shaped detection light beam, so that the detection light beam has a sufficient width, and the photoelectric receiving head can generate a signal according to the light intensity, and calculate the diameter of the yarn balloon projected on the horizontal plane in real time according to the duration of the signal.

[0029] 2. The multi-mode tension adjustment method can be used to accurately adjust the tension for different processing types. Compared with the adjustment method of a single tension regulator, it can reduce the impact of adjusting the size of the air ring on production efficiency.

[0030] 3. The present invention can reduce the energy consumption level of equipment, improve enterprise production efficiency, reduce enterprise production costs, and improve product quality, which has significant economic effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0032] Figure 1 It is a structural schematic diagram of the present invention.

[0033] Figure 2 It is a schematic diagram of the structure of the present invention when it is working.

[0034] Figure 3 It is a schematic diagram of the yarn balloon adjustment curve of the present invention.

[0035] Figure 4 It is a structural schematic diagram of a yarn twisting machine of the present invention.

[0036] Figure 5 Schematic diagram of the detection method of the prior art.

[0037] Figure 6 It is a schematic diagram of the yarn balloon adjustment curve in the prior art.

[0038] In the figure: spindle tank 1, yarn balloon 2, photoelectric transmitter 3, photoelectric receiver 4, main control device 5, detection beam 6, outer yarn 7, inner yarn 8, spindle motor 9, tension controller 10, twister 11, overfeed device 12, cable arrangement device 13, take-up device 14, distance L1 from the spindle center to the detection beam, detection beam width L2, balloon diameter R. DETAILED DESCRIPTION

[0039] Embodiment 1:

[0040] like Figures 1 to 3 A method for detecting and adjusting the size of a balloon includes a photoelectric transmitter 3 and a photoelectric receiver 4 respectively arranged on both sides of a spindle tank 1, a detection light beam 6 between the photoelectric transmitter 3 and the photoelectric receiver 4 is arranged at a position where the circumscribed circle of the yarn balloon 2 is tangent to the spindle tank 1 when the distance L2 is appropriate, and the detection light beam 6 is a light beam with a certain width or diameter. When the yarn balloon 2 blocks the detection light beam 6 and thus affects the light intensity at the receiving end, the photoelectric receiver 4 determines the size of the yarn balloon 2 by detecting the signal generated by the change in light intensity, and compares it with the preset yarn balloon parameters to determine whether the current size of the yarn balloon 2 meets the set requirements;

[0041] If the diameter of the circumscribed circle of the yarn balloon 2 on the horizontal projection plane is greater than the preset yarn balloon parameter, that is, the diameter parameter, the outer yarn tension begins to increase; if the diameter of the circumscribed circle of the yarn balloon 2 is less than the preset yarn balloon parameter, the outer yarn tension begins to decrease.

[0042] In a preferred solution, the detection light beam 6 is a parallel light band, the cross section of the detection light beam 6 is rectangular or circular, and the width or diameter of the cross section of the detection light beam 6 is 0.5 to 10 mm.

[0043] In a preferred solution, an aperture is provided in the optical path of the photoelectric emission head 3 to adjust the width or diameter of the detection light beam 6 .

[0044] In a preferred embodiment, the yarn balloon 2 refers to a curved sphere circumscribed by the outer yarn 7 during rotation.

[0045] In the preferred scheme, when the yarn balloon 2 starts to cut the detection beam 6 and the light intensity received by the photoelectric receiving head 4 becomes weaker, the duration of the current light intensity signal starts to be counted; when the yarn balloon 2 rotates away from the detection beam 6, the light intensity received by the photoelectric receiving head 4 is restored and the timing of the photoelectric receiving head 4 ends.

[0046] In the preferred solution, the calculation formula for the size of the yarn balloon 2 is:

[0047]

[0048] cos(α+β)=L1 / R Formula 2;

[0049]

[0050] When the speed of the motor driving the yarn is n, we have:

[0051] T / n=α / 2πFormula 4;

[0052] Right now:

[0053] α=2πT / nFormula 5;

[0054] Therefore:

[0055]

[0056] In the above formula, L1 is the distance from the edge of the detection beam to the center of the spindle tank, L2 is the detection beam width or diameter, R is the balloon diameter, T is the duration of the detection signal, α is the corresponding angle when the yarn balloon blocks the detection beam, and β is 1 / 2 of the corresponding angle between the intersection of the yarn balloon and the detection beam when the detection beam is not blocked;

[0057] The size of the yarn balloon 2 is calculated by the above mathematical formula, and the photoelectric receiving head 4 determines whether the size of the yarn balloon 2 is appropriate at this time.

[0058] like Figure 3 Shown in the figure is the fluctuation curve of the diameter of the yarn balloon 2 during the adjustment process. Because in the control process, by adjusting the tension of the external yarn 7, the diameter of the yarn balloon 2 always fluctuates around the preset value. Compared with the prior art represented by patent 201910712746.8, the structure of the present invention can realize PID-based adjustment, making the fluctuation of the diameter of the yarn balloon 2 smoother and more stable.

[0059] The preferred solution is Figure 1 In the embodiment, the maximum rotation angle corresponding to the tangent intersection point of the detection light beam 6 and the yarn balloon 2 is less than 90°.

[0060] In a preferred solution, the detection beam 6 is arranged tilted compared to the axis of the spindle tank 1, so that the detection beam 6 is nearly perpendicular to the rotating outer yarn 7. With this structure, the detection signal generated by the cutting of the detection beam 6 by the outer yarn 7 is clearer. In the calculation process, the horizontal projection parameters of the yarn balloon 2 are used for calculation.

[0061] When in use, one rotation of the spindle motor 9 is regarded as a cycle. When there is no detection signal or only one detection signal T in one cycle, it is necessary to adjust and reduce the tension of the outer yarn 7. When there are two detection signals in one cycle, that is, two detection signals T, the diameter of the yarn balloon 2 on the horizontal projection plane is obtained by the duration T of the detection signal and the above formula calculation set, that is, the size of the yarn balloon 2. Thus, PID control is performed according to the size of the balloon to obtain a smooth adjustment curve.

[0062] In another optional scheme, in another optional control method, when the detection beam 6 has a sufficient width, the spindle motor 9 rotates one circle as a cycle. When there is no detection signal in a cycle, full speed adjustment is required to increase the diameter of the yarn balloon 2. When there are two detection signals in a cycle, full speed adjustment is required to reduce the diameter of the yarn balloon 2. When there is only one detection signal T, the duration of the detection signal T is recorded, and the diameter of the yarn balloon 2 is calculated according to the angle parameter corresponding to the duration T of the detection signal. PID control is performed according to the size of the balloon to obtain a smooth adjustment curve, such as Figure 3 as shown in .

[0063] Embodiment 2:

[0064] The preferred solution is Figure 4 In the apparatus, a main control device 5 is also provided, which is electrically connected to the photoelectric transmitter 3 and the photoelectric receiver 4, and supplies power to the photoelectric transmitter 3 and the photoelectric receiver 4, and receives the signal sent by the photoelectric receiver 4;

[0065] The main control device 5 adjusts the tension of the yarn balloon 2 in a timely manner by controlling the tension controller 10 .

[0066] The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A method for detecting and adjusting the size of a balloon, comprising a photoelectric transmitter (3) and a photoelectric receiver (4) respectively arranged on both sides of a spindle tank (1), wherein a detection light beam (6) between the photoelectric transmitter (3) and the photoelectric receiver (4) is arranged at a position where the circumscribed circle of the yarn balloon (2) is tangent to the spindle tank (1) when the circumscribed circle is at an appropriate distance (L2), and wherein: The detection beam (6) is a beam with a certain width or diameter. When the yarn balloon (2) blocks the detection beam (6) and thus affects the light intensity at the receiving end, the photoelectric receiving head (4) determines the size of the yarn balloon (2) by detecting the signal generated by the change in light intensity, and compares it with the preset yarn balloon parameters to determine whether the current size of the yarn balloon (2) meets the set requirements. If the diameter of the circumscribed circle of the yarn balloon (2) is greater than the preset yarn balloon parameter, the outer yarn tension begins to increase; if the diameter of the circumscribed circle of the yarn balloon (2) is less than the preset yarn balloon parameter, the outer yarn tension begins to decrease.

2. The method for detecting and adjusting the size of the balloon according to claim 1, characterized in that: The detection beam (6) is a parallel light band, the cross section of the detection beam (6) is rectangular or circular, and the width or diameter of the cross section of the detection beam (6) is 0.5 to 10 mm; The maximum rotation angle corresponding to the tangent intersection point between the detection light beam (6) and the yarn balloon (2) is less than 90°.

3. The method for detecting and adjusting the size of the balloon according to claim 1, characterized in that: An aperture is arranged in the optical path of the photoelectric emission head (3) to adjust the width or diameter of the detection light beam (6).

4. The method for detecting and adjusting the size of the balloon according to claim 1, characterized in that: First, one rotation of the spindle motor (9) is regarded as a cycle. When there is no detection signal within a cycle, full speed adjustment is required to increase the diameter of the yarn balloon (2). When there are two detection signals within a cycle, full speed adjustment is required to decrease the diameter of the yarn balloon (2). When there is only one detection signal T, the duration of the detection signal T is recorded, and the diameter of the yarn balloon (2) is calculated based on the rotation angle parameter corresponding to the duration T of the detection signal. PID control is performed according to the size of the balloon to obtain a smooth adjustment curve.

5. The method for detecting and adjusting the size of the balloon according to claim 1 or 2, characterized in that: When the yarn balloon (2) starts to cut the detection light beam (6) so that the light intensity received by the photoelectric receiving head (4) becomes weaker, the duration of the current light intensity signal starts to be counted; when the yarn balloon (2) rotates away from the detection light beam (6), the light intensity received by the photoelectric receiving head (4) is restored and the timing of the photoelectric receiving head (4) ends.

6. The method for detecting and adjusting the size of the balloon according to claim 5, characterized in that: The calculation formula of the size of the yarn balloon (2) is calculated by projecting the yarn balloon (2) on the horizontal plane: cos(α+β)=L1 / R Formula 2; When the speed of the motor driving the yarn is n, we have: T / n=α / 2πFormula 4; Right now: α=2πT / nFormula 5; Therefore: In the above formula, L1 is the distance from the edge of the detection beam to the center of the spindle tank, L2 is the detection beam width or diameter, R is the balloon diameter, α is the corresponding angle when the yarn balloon blocks the detection beam, and β is 1 / 2 of the corresponding angle between the intersection of the yarn balloon and the detection beam when the detection beam is not blocked; The size of the yarn balloon (2) is calculated by the above mathematical formula, and the photoelectric receiving head (4) determines whether the size of the yarn balloon (2) is appropriate at this time.

7. The method for detecting and adjusting the size of the balloon according to any one of claims 1 to 3 or 5 to 6, characterized in that: The detection light beam (6) is arranged tilted compared to the axis of the spindle pot (1) so that the detection light beam (6) is nearly perpendicular to the rotating outer yarn (7).

8. The method for detecting and adjusting the size of the balloon according to any one of claims 1 to 3 and 6, characterized in that: A main control device (5) is also provided. The main control device (5) is electrically connected to the photoelectric transmitter (3) and the photoelectric receiver (4), and supplies power to the photoelectric transmitter (3) and the photoelectric receiver (4). The main control device (5) receives signals sent by the photoelectric receiver (4). The main control device (5) timely adjusts the tension of the yarn balloon (2) by controlling the tension controller (10).

Images