Wrapping machine with tension monitoring function

Abstract

The invention provides a wrapping machine with a tension monitoring function, which comprises a tension detection module, a wrapping module and a traction module, and is characterized in that the tension detection module comprises a magnetic field unit and a detection unit; the magnetic field unit comprises a first magnetic pole and a second magnetic pole; the detection unit comprises a first pair of transmission rollers, a second pair of transmission rollers, an induced voltage detection module and an inversion module. According to the invention, non-contact real-time monitoring of the tension in the wrapping process is realized, and the technical problem that the tension of a high-speed rotating wrapping material is difficult to directly detect is solved.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to the field of cable manufacturing. Background Art

[0002] Medical cables play a vital role in medical devices, connecting the various components of the device to ensure accurate data transmission and stable power supply. Medical cables are used in a wide range of applications, including high-end imaging equipment such as CT scanners, MRI machines, and endoscopes.

[0003] Endoscope cables, in particular, place even higher demands on the cable and present significant manufacturing challenges. They require excellent flexibility, electrical conductivity, strong anti-interference capabilities, and the ability to clearly transmit image signals. These characteristics necessitate precise tension control during cable manufacturing. During the cable manufacturing process, the accuracy of tension control during the wrapping process directly impacts the cable's mechanical strength and electrical performance. Tension fluctuations can also increase cable losses, impacting signal transmission quality.

[0004] However, in existing cable manufacturing, conductor cores are often coated with a variety of materials to meet different requirements. During the existing wrapping process, the coating material rotates at high speeds, making it difficult to directly measure the tension of the coating material, or the measurement results are inaccurate. Summary of the Invention

[0005] In response to the above-mentioned problems, the present application provides a wrapping machine with a tension detection module, which can continuously monitor the tension of the wrapping material during the wrapping process.

[0006] The present application provides a wrapping machine with a tension monitoring function, comprising a tension detection module, a wrapping module and a traction module; The tension detection module includes a magnetic field unit and a detection unit; The magnetic field unit includes a first magnetic pole and a second magnetic pole; the first magnetic pole and the second magnetic pole are arranged opposite to each other and generate a magnetic field; the first magnetic pole is an N pole; the second magnetic pole is an S pole; The detection unit includes a first pair of transmission rollers, a second pair of transmission rollers, an induced voltage detection module, and an inversion module; the first pair of transmission rollers and the second pair of transmission rollers are arranged at a distance L from each other and are used to transmit the conductor core; the induced voltage detection module is electrically connected to the first pair of transmission rollers and the second pair of transmission rollers, respectively, and is used to obtain the induced voltage generated by the conductor core cutting the magnetic field during the wrapping process, and to obtain the vibration frequency of the conductor core; The inversion module is used to invert the tension of the coating material according to the vibration frequency of the conductor core; The wrapping module is used to wrap the wrapping material around the surface of the conductor core, with the conductor core as a rotation axis; The traction module is used to provide a pulling force F0 to the conductor core so that the conductor core travels at a preset speed; The conductor core is arranged in the magnetic field generated by the first magnetic pole and the second magnetic pole.

[0007] Furthermore, the inversion module inverts the tension of the coating material according to the vibration frequency of the conductor core, including the following steps: Step a, obtaining the pulling force F0 of the traction module; Step b: Calculate the actual tension F1 on the conductor core (1); Wherein, f is the vibration frequency of the conductor core during the wrapping process; L is the distance between the first pair of transmission rollers and the second pair of transmission rollers; K is a constant; Step c: Calculate the horizontal component T of the tension T according to formula (2): H : (2); Step d: Inverse the tension according to formula (3): (3); in, is the angle between the coating material and the conductor core, 0°< <90°.

[0008] Furthermore, the constant K is calculated by formula (4): (4) Where μ is the linear density of the conductor core.

[0009] Furthermore, the diameter of the conductor core is 0.1-1 mm.

[0010] Furthermore, the first pair of transmission rollers and the second pair of transmission rollers are made of conductive material.

[0011] Furthermore, the conductor core is made of copper.

[0012] Furthermore, the magnetic field unit is located between the first pair of transmission rollers and the second pair of transmission rollers.

[0013] Furthermore, the first magnetic pole is a permanent magnet; the second magnetic pole is a permanent magnet.

[0014] Furthermore, the traction module is arranged downstream of the wrapping module; and the wrapping module is arranged between the first pair of transmission rollers and the second pair of transmission rollers.

[0015] Compared with the prior art, this application has the following advantages: This application utilizes the conductor core vibration cutting magnetic field to generate induced voltage, and combines it with string vibration theory to obtain the horizontal component of tension, thereby inverting the tension of the coating material. The structure is simple and reliable, and non-contact real-time monitoring of tension during the wrapping process is realized, solving the technical problem that it is difficult to directly detect the tension of high-speed rotating coating materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 Schematic diagram of the structure of the wrapping machine of this embodiment; Figure 2 Schematic diagram of the forces acting on the conductor core 10 during the wrapping process; Figure 3 for Figure 1 Schematic cross-section along direction A. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0019] Figure 1 The wrapping machine structure diagram of this embodiment is shown in FIG. The wrapping machine includes a tension detection module, a wrapping module (not shown in the figure), and a traction module 90. The wrapping module drives the wrapping material 20 to rotate with the conductor core as the rotation axis, thereby wrapping the wrapping material 20 on the surface of the conductor core 10. The traction module 90 is used to provide a pulling force F0 to the conductor core 10, so that the conductor core 10 moves at a preset speed ( Figure 1 In this embodiment, the traction module 90 is arranged downstream of the wrapping module; the wrapping module is arranged between the first pair of transmission rollers 50 and the second pair of transmission rollers 60. Figure 1 As shown, the tension detection module includes a magnetic field unit and a detection unit.

[0020] The magnetic field unit includes a first magnetic pole 30 and a second magnetic pole 40. The first magnetic pole 30 and the second magnetic pole 40 are arranged opposite each other and located between a first pair of transport rollers 50 and a second pair of transport rollers 60, forming a magnetic field region. The magnetic field direction is perpendicular to the travel direction of the conductor core 10 (in this embodiment, the travel direction is horizontal, while the magnetic field direction is vertical). Preferably, the first magnetic pole 30 is an N pole; the second magnetic pole 40 is an S pole. A portion of the conductor core 10 to be coated is arranged within the magnetic field region generated by the first magnetic pole 30 and the second magnetic pole 40, and the axis of the conductor core 10 is perpendicular to the magnetic field.

[0021] Preferably, the first magnetic pole 30 and the second magnetic pole 40 are both permanent magnets.

[0022] The detection unit includes a first pair of transmission rollers 50, a second pair of transmission rollers 60, an induced voltage detection module 70 and an inversion module 80; the first pair of transmission rollers 50 and the second pair of transmission rollers 60 are arranged at a distance L from each other for transmitting the conductor core.

[0023] Preferably, the first pair of transmission rollers 50 and the second pair of transmission rollers 60 may be made of conductive material to serve as pins of the induction voltage detection module 70 .

[0024] The induced voltage detection module 70 is electrically connected to the first pair of transmission rollers 50 and the second pair of transmission rollers 60 respectively, and is used to obtain the induced voltage generated by the conductor core 10 cutting the magnetic field during the wrapping process and extract the vibration frequency of the conductor core.

[0025] an inversion module 80 for inverting the tension of the coating material 20 according to the vibration frequency of the conductor core 10; The traction module 90 is disposed downstream of the wrapping module; the wrapping module is disposed between the first pair of transmission rollers 50 and the second pair of transmission rollers 60 .

[0026] Figure 2 FIG. 1 shows a schematic diagram of the force applied to the conductor core 10 during the wrapping process. Figure 2 As shown, the covering material 20 applies a tension T to the conductor core, and the tension T can be decomposed into a horizontal component T along the horizontal direction. H and the vertical component T along the vertical direction V , and the following relations are satisfied:

[0027] During the wrapping process, the vertical component T V The conductor core 10 will be driven to perform minute periodic vibrations, that is, the conductor core 10 will perform chordal vibration motion around the horizontal direction with the first pair of transmission rollers 50 and the second pair of transmission rollers 60 as fulcrums respectively. Figure 3 Shown Figure 1 The cross-sectional view along the A direction. Figure 3As shown, the conductor core 10 performs annular, periodic motion in the magnetic field region ( Figure 3 As the conductor core 10 vibrates, the magnetic field is periodically cut, thereby generating a periodic induced voltage. That is, the frequency of the induced voltage is the same as the vibration frequency of the conductor core 10. The inversion module 80 of this embodiment extracts the frequency of the induced voltage from the induced voltage signal obtained by the induced voltage detection module 70 as the vibration frequency f of the conductor core 10.

[0028] In this embodiment, the induced voltage detection module 70 is a high-sensitivity voltmeter. Specifically, the two ends of the high-sensitivity voltmeter are connected to the first pair of transmission rollers 50 and the second pair of transmission rollers 60, respectively, to measure the induced voltage generated by the conductor core 10 cutting through the magnetic field. Preferably, the first pair of transmission rollers 50 and the second pair of transmission rollers 60 are made of a conductive metal material.

[0029] Since the force point of the conductor core 10 is close to the second pair of transmission rollers 60, in order to facilitate subsequent calculations, this embodiment regards the conductor core between the first pair of transmission rollers 50 and the second pair of transmission rollers 60 as a chord with uniform mass distribution, thereby ignoring the impact of the uneven mass caused by the coating material 20.

[0030] According to the string vibration theory, the actual force F1 exerted on the conductor core 10 in the horizontal direction during the winding process can be calculated by formula (1): (1); Wherein, f is the vibration frequency of the conductor core during the wrapping process; L is the distance between the first pair of transmission rollers and the second pair of transmission rollers; K is a constant.

[0031] See again Figure 2 In the horizontal direction, the conductor core 10 is not only subjected to the horizontal component T of the tension T of the coating material 20, but also to the horizontal component T of the tension T of the coating material 20. V , and is also subjected to the pulling force F0 of the traction module 90. Therefore, the horizontal component T of the tension T H It can be calculated by formula (2): (2) Preferably, the pulling force F0 of the traction module 90 is a set value of the traction module 90 or an output value measured by an existing method.

[0032] Combine Figure 2 , the tension T can be expressed by the horizontal component T of the tension T H According to formula (3), we can get: (3) Preferably, the constant K can be calculated by formula (4): (4) Where μ is the linear density of the conductor core.

[0033] In summary, the process of inverting the tension T by the inversion module 80 includes the following steps: Step a, obtaining the pulling force F0 of the traction module; Step b: Calculate the actual tension F1 on the conductor core (1); Wherein, f is the vibration frequency of the conductor core during the wrapping process; L is the distance between the first pair of transmission rollers and the second pair of transmission rollers; K is a constant; Step c: Calculate the horizontal component T of the tension T according to formula (2): H : (2); Step d: Inverse the tension according to formula (3): (3); in, is the angle between the coating material and the conductor core, 0°< <90°.

[0034] Preferably, the diameter of the conductor core 10 is 0.1-1 mm.

[0035] Preferably, the conductor core 10 is made of copper.

[0036] The terms "equal," "same," or "equal" disclosed in this application must take into account the distribution of engineering parameters, with an error distribution within ±30%; the definition of "parallel" between two line segments or two straight lines is that the angle between the two line segments or two straight lines is less than or equal to 45 degrees; the definition of "perpendicular" between two line segments or two straight lines is that the angle between the two line segments or two straight lines is within the range of [60, 120] degrees; the definition of "phase mismatch" also needs to take into account the distribution of engineering parameters, with an error distribution of the degree of mismatch within ±30%. In addition, in this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus. Without further constraints, an element defined by the phrase "comprises a..." does not preclude the existence of additional identical elements in the process, method, article or apparatus that includes the element.

[0037] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0038] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wrapping machine with tension monitoring function, characterized in that: It includes tension detection module, wrapping module and traction module; The tension detection module includes a magnetic field unit and a detection unit; The magnetic field unit includes a first magnetic pole and a second magnetic pole; the first magnetic pole and the second magnetic pole are arranged opposite to each other and generate a magnetic field; the first magnetic pole is an N pole; the second magnetic pole is an S pole; The detection unit includes a first pair of transmission rollers, a second pair of transmission rollers, an induced voltage detection module, and an inversion module; the first pair of transmission rollers and the second pair of transmission rollers are arranged at a distance L from each other and are used to transmit the conductor core; the induced voltage detection module is electrically connected to the first pair of transmission rollers and the second pair of transmission rollers, respectively, and is used to obtain the induced voltage generated by the conductor core cutting the magnetic field during the wrapping process, and to obtain the vibration frequency of the conductor core; The inversion module is used to invert the tension of the coating material according to the vibration frequency of the conductor core; The wrapping module is used to wrap the wrapping material around the surface of the conductor core, with the conductor core as a rotation axis; The traction module is used to provide a pulling force F0 to the conductor core so that the conductor core travels at a preset speed; The conductor core is arranged in the magnetic field generated by the first magnetic pole and the second magnetic pole.

2. The wrapping machine with tension monitoring function according to claim 1, characterized in that: The inversion module inverts the tension of the coating material according to the vibration frequency of the conductor core, comprising the following steps: Step a, obtaining the pulling force F0 of the traction module; Step b: Calculate the actual tension F1 on the conductor core （1）； Wherein, f is the vibration frequency of the conductor core during the wrapping process; L is the distance between the first pair of transmission rollers and the second pair of transmission rollers; K is a constant; Step c: Calculate the horizontal component T of the tension T according to formula (2): H : （2）； Step d: Inverse the tension according to formula (3): （3）； in, is the angle between the coating material and the conductor core, 0°< <90°.

3. The wrapping machine with tension monitoring function according to claim 2, characterized in that: The constant K is calculated by formula (4): （4） Where μ is the linear density of the conductor core.

4. The wrapping machine with tension monitoring function according to claim 1, characterized in that: The diameter of the conductor core is 0.1-1 mm.

5. The wrapping machine with tension monitoring function according to claim 1, characterized in that: The first pair of transmission rollers and the second pair of transmission rollers are made of conductive material.

6. The wrapping machine with tension monitoring function according to claim 1, characterized in that: The conductor core is made of copper.

7. The wrapping machine with tension monitoring function according to claim 1, characterized in that: The magnetic field unit is located between the first pair of transport rollers and the second pair of transport rollers.

8. The wrapping machine with tension monitoring function according to claim 1, characterized in that: The first magnetic pole is a permanent magnet; the second magnetic pole is a permanent magnet.

9. The wrapping machine with tension monitoring function according to claim 1, characterized in that: The traction module is arranged downstream of the wrapping module; the wrapping module is arranged between the first pair of transmission rollers and the second pair of transmission rollers.

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