Elongate physical transmission medium

Abstract

The invention relates to an elongate physical transmission medium (12) having a first elongate shielding element (41) and a second elongate shielding element (42), wherein the first shielding element (41) is laid around the transmission medium (12) in a positive direction of rotation in a plurality of turns, and wherein the second shielding element (42) is laid around the transmission element (12) in a negative direction of rotation in a plurality of turns.

Description

[0001] Description

[0002] Elongated physical transmission medium

[0003] The invention relates to an elongated physical transmission medium.

[0004] The durability and effectiveness of foil shields are often impaired, particularly in moving cables.

[0005] Data lines or data elements in hybrid cables, in particular, are therefore double-shielded. This means that, in addition to the classic braided shield for low frequencies, a second shield, such as metallized foils, is added. These can be installed lengthwise for stationary cables. For moving cables and chain cables, the foil can be installed diagonally. However, even with these solutions, especially in moving cables, durability is not optimal.

[0006] The invention is based on the object of improving this.

[0007] The problem is solved by an elongated physical transmission medium according to claim 1.

[0008] This comprises a first elongated shielding element and a second elongated shielding element, wherein the first shielding element is laid around the transmission medium in a positive direction of rotation in several turns, wherein the second shielding element is laid around the transmission element in a negative direction of rotation in several turns.

[0009] The double shielding has the advantage of preventing electromagnetic interference, for example.

[0010] In an advantageous embodiment, the second elongated shielding element at least substantially covers the first elongated shielding element. Complete coverage is advantageous because it prevents susceptibility to interference from, for example, other cables or technical devices. A further advantageous embodiment is one in which the first elongated shielding element is wrapped around the transmission medium from a front end to a rear end.

[0011] This way, good shielding can be achieved.

[0012] Also advantageous is an embodiment according to which the second elongate shielding element is placed around the transmission medium from a front end to a rear end of the transmission medium.

[0013] Advantageously, the windings are arranged such that the shielding element in a second winding partially covers the shielding element in a first winding.

[0014] This is advantageous for both the first elongated shielding element and the second elongated shielding element.

[0015] The drawings clearly show this partial overlap.

[0016] The first elongated shielding element is advantageously a shielding foil with a width and a thickness. The second elongated shielding element is advantageously also a shielding foil.

[0017] One possible material for the shielding foil is aluminum. Aluminum foil provides good shielding against electromagnetic interference (EMI) and is cost-effective. The foil can be advantageously combined with a metallic braid to provide additional protection.

[0018] Copper foil is also conceivable. Copper foil can also be used, for example, as the outer layer of shielded cables. Copper offers good electrical conductivity and high shielding effectiveness. Copper foils can also be thin and flexible, which is advantageous in certain applications.

[0019] Aluminum-polyester foil is another option. This type of shielding foil combines an aluminum layer with a polyester foil. This combination provides good shielding and flexibility. The polyester foil can also serve as mechanical protection. Mylar foil can also be used. Mylar is a brand name for a polyester foil. This can also be used as the outer layer of the shielding.

[0020] Polyester films often offer a certain degree of flexibility and are resistant to moisture.

[0021] The materials can also be combined. A further advantageous design is one in which the shielding foil is used in combination with a braid of metallic wires to ensure effective shielding against electromagnetic interference. The combination of shielding foil and braid offers good protection against various types of electromagnetic interference.

[0022] The choice of material for the shielding film depends advantageously on the specific requirements of the application, including the required shielding performance, flexibility, environmental factors and cost.

[0023] The object is further achieved by a method for producing an elongated physical transmission medium, wherein a first shielding element is placed around the transmission medium in a positive direction of rotation in several turns, wherein a second shielding element is placed around the transmission element in a negative direction of rotation in several turns.

[0024] The problem can also be solved by using an elongated physical transmission medium as a data line and / or control line.

[0025] The invention is described and explained in more detail below with reference to the exemplary embodiments shown in the figures. They show:

[0026] FIG 1 a single foil-shielded cable,

[0027] FIG 2 a double foil-shielded cable,

[0028] FIG 3 shows a data line or control line which is doubly shielded in opposite directions, and FIG 4 shows a method for producing an elongated physical transmission medium.

[0029] FIG 1 shows a single foil-shielded cable 10.

[0030] This has wires 2, a stranded core or core 3, a shielding foil 4, a shielding braid 5 and a sheath 6.

[0031] The simple foil shielding in the figure is also formed by a shielding foil 4 in which the windings overlap. This is represented by reference numeral 7.

[0032] FIG 2 shows a double foil-shielded cable 11.

[0033] The cable is shielded by a first shielding foil 41 and a second shielding foil 42. The two shielding foils 41, 42 are arranged such that they overlap in the same direction.

[0034] FIG 3 shows a line 12. This is advantageously a data line or control line which is doubly shielded in opposite directions.

[0035] Double-shielded cables, especially data cables and / or control cables, offer several advantages in terms of signal quality and the reduction of electromagnetic interference.

[0036] Some of the key benefits are:

[0037] EMI (Electromagnetic Interference) Protection: Double shielding minimizes electromagnetic interference from external sources. This is especially important in environments with many electronic devices or in industrial settings where interference could affect signal quality.

[0038] Interference protection: The outer shielding provides advantageous protection against external electromagnetic fields, while the inner shielding protects the signal from internal interference. This is especially important when the cables run through areas with strong electric fields. Improved signal integrity: The shielding advantageously minimizes the likelihood of signal distortion and ensures more reliable data transmission over the cables. This is especially important in applications where precise signal transmission is required, such as telecommunications or data transmission.

[0039] Reduced crosstalk: Double shielding advantageously reduces the likelihood of crosstalk between cables, especially when multiple cables are laid in parallel. This better preserves the integrity of the individual signals.

[0040] Improved security: In some applications, especially in security-critical environments, double shielding can help make sensitive data less vulnerable to eavesdropping or unwanted external interference.

[0041] Suitability for longer transmission distances: Double-shielded cables are often better suited for longer transmission distances because they offer better shielding against signal loss.

[0042] The embodiment shown in FIG 3 is more robust than the designs shown in FIG 1 and FIG 2.

[0043] The wires 2 are surrounded by a stranded core 3. The double shielding is achieved in the figure by two elongated shielding elements in the form of the first shielding foil 41 and the second shielding foil 42.

[0044] In the figure, the first shielding foil 41 is wrapped around the wires 2, including the stranded core or core 3, in several turns in a positive direction of rotation. The second shielding foil 42 is wrapped around them in several turns in a negative direction of rotation and, as shown in FIG. 3, covers the first shielding foil 41.

[0045] The wrapping of the second shielding foil 42 also clearly shows that an overlap 7 is present. In other words, this means that a second turn of the second shielding foil 42 partially covers a first turn. The shielding foils 41, 42 shown have a width b42 and b41, respectively. The width b is advantageously greater than a thickness d of the shielding foil (not shown).

[0046] FIG 4 shows a method for producing an elongated physical transmission medium.

[0047] In a first process step, a first shielding element is wound around the transmission medium in a positive direction of rotation in several turns. In a second process step, a second shielding element is wound around the transmission element in a negative direction of rotation in several turns.

[0048] The winding can begin from the same end of the transmission medium. For example, the first shielding element is wrapped around the transmission medium in several turns in the positive direction, starting at the front end of the transmission medium. Similarly, starting at the front end of the transmission medium, the second shielding element can be wrapped around the transmission element in several turns in the negative direction.

[0049] The following is also possible: The first shielding element is wrapped around the transmission medium in several turns in the positive direction of rotation, starting at the front end of the transmission medium. The second shielding element is wrapped around the transmission element, starting at the rear end of the transmission medium. In this embodiment, it is important that the windings are in the opposite direction.

[0050] As shown in FIG 3, the two shielding elements cross each other.

[0051] The transmission medium shown in FIGS. 1 to 3 is advantageously a data line and / or control line. The data line or control line serves as a connection between a transmitter and receiver. It is possible to transmit information or data using these lines.

[0052] Bidirectional communication is advantageous here; for example, the transmission medium is used for communication between a motor and an inverter (e.g., using DRIVE-CLiQ®). Application in communication in automation, e.g., using PROFINET, EtherCAT, Profibus, and / or data and communication lines in general, is possible. Other transmission types, such as Single Pair Ethernet, can also be improved by the invention.

[0053] By applying the shielding foils 41 and 42 in opposite directions, the structure of the shielding foils 41, 42 is more stable overall and can withstand more movement cycles, even under severe bending. A continuous shield is maintained even under severe bending. The data lines are thus more resilient and adequately shielded against electromagnetic interference, even under severe bending. The invention is therefore particularly well-suited for moving cables and drag chain cables. However, other applications are also conceivable.

Claims

Patent claims 1. Elongated physical transmission medium (12), comprising wires (2) in a stranded assembly (3), comprising a first elongated shielding element (41) and a second elongated shielding element (42), wherein the first shielding element (41) is laid in a positive direction of rotation in several turns around the stranded assembly (3), wherein the second shielding element (42) is laid in a negative direction of rotation in several turns around the stranded assembly (3).

2. Elongated physical transmission medium (12) according to claim 1, wherein the turns are arranged such that the shielding element in a second turn partially covers the shielding element in a first turn.

3. Elongated physical transmission medium (12) according to one of the preceding claims, comprising a shielding braid (5).

4. Elongated physical transmission medium (12) according to one of the preceding claims, wherein the second elongated shielding element (42) at least substantially covers the first elongated shielding element (41).

5. An elongated physical transmission medium (12) according to any one of the preceding claims, wherein the first elongated shielding element (41) is wrapped around the transmission medium (12) from a front end to a rear end.

6. An elongated physical transmission medium (12) according to any one of the preceding claims, wherein the second elongated shielding element (42) is wrapped around the transmission medium (12) from a front end to a rear end.

7. Elongated physical transmission medium (12) according to one of the preceding claims, wherein the turns are arranged such that the shielding element (41, 42) in a second turn partially covers the shielding element (41, 42) in a first turn.

8. Elongated physical transmission medium (12) according to one of the preceding claims, wherein the first elongated shielding element (41) is a shielding foil.

9. An elongated physical transmission medium (12) according to any one of the preceding claims, wherein the second elongated shielding element (42) is a shielding foil.

10. A method for producing an elongated physical transmission medium (12) according to one of claims 1 to 9, wherein a first shielding element (41) is wound around a stranded assembly (3) in a positive direction of rotation in several turns, and wherein a second shielding element (42) is wound around the stranded assembly (3) in a negative direction of rotation in several turns.

11. Use of an elongated physical transmission medium (12) according to one of claims 1 to 9 as a data line and / or control line.

12. Use according to claim 11, wherein the data line and / or control line is a moving line.

13. Use according to one of claims 11 or 12, wherein the data line and / or control line is a drag chain cable.

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