A multi-layer shielded anti-interference camera cable

Abstract

The utility model discloses a multilayer shielding anti -interference camera head line, including the line body, the both ends of line body all have ferrite magnetic ring of sleeve joint, the inside of line body is by multilayer shielding layer, cross insulated partition, power cord and signal line is composed, power cord and signal line all are provided with two groups, and two groups power cord and signal line are through cross insulated partition and are alternately separated, the outside of cross insulated partition, power cord and signal line is covered with multilayer shielding layer, through the design of multilayer shielding structure, effectively improved the anti -interference ability of camera head line, especially in high -frequency signal transmission process, can significantly reduce electromagnetic interference (EMI) and radio frequency interference (RFI) to the influence of image quality and signal stability. The combined use of aluminum foil shielding layer, braided copper mesh, conductive cloth and kevlar fiber layer realizes the comprehensive shielding to high low frequency mixed interference, ensures the clear transmission of signal.

Description

Technical Field

[0001] This utility model relates to the field of camera cable technology, specifically a multi-layer shielded anti-interference camera cable. Background Technology

[0002] Existing camera cables are susceptible to electromagnetic interference (EMI) and radio frequency interference (RFI) during high-frequency signal transmission, leading to problems such as image blurring and signal loss. Traditional shielded cables often use single-layer aluminum foil or braided copper mesh structures, which have limited shielding effectiveness against mixed high- and low-frequency interference. Furthermore, the lack of effective isolation between power lines and signal lines easily generates crosstalk. Utility Model Content

[0003] The purpose of this invention is to provide a multi-layer shielded anti-interference camera cable to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer shielded anti-interference camera cable, comprising a cable body, both ends of which are fitted with ferrite magnetic rings. The interior of the cable body consists of multiple shielding layers, a cross-shaped insulating partition, power lines, and signal lines. Two sets of power lines and signal lines are provided, and the two sets of power lines and signal lines are alternately separated by the cross-shaped insulating partition. The cross-shaped insulating partition, power lines, and signal lines are covered by multiple shielding layers. The multiple shielding layers consist of a Kevlar fiber layer, conductive cloth, braided copper mesh, and an aluminum foil shielding layer. The aluminum foil shielding layer is surrounded by a braided copper mesh, the braided copper mesh by a conductive cloth, and the conductive cloth by a Kevlar fiber layer.

[0005] The aluminum foil shielding layer has an average shielding effectiveness of 35dB, effectively suppressing high-frequency interference. The braided copper mesh, made of tin-plated copper wire with a density of ≥85%, covers the aluminum foil shielding layer, enhancing low-frequency magnetic field shielding. The conductive cloth is tightly bonded to the braided copper mesh, providing a shielding range of 100kHz-3GHz and improving high-frequency anti-interference capabilities. The Kevlar fiber layer is a high-strength fiber that enhances tensile strength and prevents the shielding layer from breaking. Ferrite magnetic rings are fitted at both ends of the wire body to attenuate common-mode interference. Signal lines and power lines are isolated by a cross-shaped insulating partition, which is equipped with a grounding copper strip to reduce power supply noise coupling.

[0006] Preferably, one end of the cross-shaped insulating partition is fixed with a grounding copper strip, and the cross-shaped insulating partition is made of epoxy resin.

[0007] Preferably, a filler layer, which is resin, is further filled between the aluminum foil shielding layer and the power line and signal line.

[0008] Preferably, the power line includes an insulating layer and a multi-strand stranded oxygen-free copper conductor, with the insulating layer covering the outside of the oxygen-free copper conductor. The signal line and power line are bundled separately to avoid signal crosstalk.

[0009] Preferably, the signal line includes a second insulating layer and two strands of signal wire core, with the second insulating layer covering the outside of the signal wire core.

[0010] Preferably, both the first insulating layer and the second insulating layer are made of polyethylene.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The multi-layered shielding structure effectively enhances the camera cable's anti-interference capabilities, particularly during high-frequency signal transmission, significantly reducing the impact of electromagnetic interference (EMI) and radio frequency interference (RFI) on image quality and signal stability. The combination of aluminum foil shielding, braided copper mesh, conductive cloth, and Kevlar fiber layers provides comprehensive shielding against mixed high and low frequency interference, ensuring clear signal transmission. Simultaneously, the power and signal lines are effectively isolated by a cross-shaped insulating partition, preventing power supply noise from interfering with the signal lines and further improving signal purity and stability. Furthermore, the ferrite cores at both ends of the cable attenuate common-mode interference, further enhancing overall anti-interference performance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the present invention;

[0015] Figure 3 This is a partial structural schematic diagram of the cross-shaped insulating partition of this utility model;

[0016] Figure 4 This is a cross-sectional view of the power cord of this utility model;

[0017] Figure 5 This is a cross-sectional view of the signal line of this utility model.

[0018] In the diagram: 1. Wire body; 2. Ferrite magnetic ring; 3. Kevlar fiber layer; 4. Conductive cloth; 5. Braided copper mesh; 6. Aluminum foil shielding layer; 7. Power line; 8. Signal line; 9. Cross-shaped insulating partition; 10. Filler layer; 11. Grounding copper strip; 12. Oxygen-free copper conductor; 13. Insulation layer one; 14. Insulation layer two; 15. Signal wire core. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] Please see Figure 1-5 This utility model provides a multi-layer shielded anti-interference camera cable, including a cable body 1. Both ends of the cable body 1 are fitted with ferrite magnetic rings 2. The interior of the cable body 1 consists of multiple shielding layers, a cross-shaped insulating partition 9, power lines 7, and signal lines 8. There are two sets of power lines 7 and signal lines 8, and the two sets of power lines 7 and signal lines 8 are alternately separated by the cross-shaped insulating partition 9. The cross-shaped insulating partition 9, power lines 7, and signal lines 8 are covered with multiple shielding layers. The multiple shielding layers consist of a Kevlar fiber layer 3, a conductive cloth 4, a braided copper mesh 5, and an aluminum foil shielding layer 6. The aluminum foil shielding layer 6 is covered with a braided copper mesh 5, the braided copper mesh 5 is covered with a conductive cloth 4, and the conductive cloth 4 is covered with a Kevlar fiber layer 3.

[0021] Specifically, the aluminum foil shielding layer 6 has an average shielding effectiveness of 35dB, effectively suppressing high-frequency interference. The braided copper mesh 5 is made of tin-plated copper wire with a density of ≥85%, covering the aluminum foil shielding layer 6 to enhance low-frequency magnetic field shielding; the conductive cloth 4 is tightly bonded to the braided copper mesh 5, providing a shielding range of 100kHz-3GHz and improving high-frequency anti-interference capability. The Kevlar fiber layer 3 is a high-strength fiber that enhances tensile strength and prevents the shielding layer from breaking. Ferrite magnetic rings 2 are sleeved at both ends of the wire body 1, which can attenuate common-mode interference. The signal line 8 and the power line 7 are isolated by a cross-shaped insulating partition 9.

[0022] One end of the cross-shaped insulating partition 9 is fixed with a grounding copper strip 11, and the cross-shaped insulating partition 9 is made of epoxy resin.

[0023] Specifically, a grounding copper strip 11 is fixed to one end of the cross-shaped insulating partition 9, which can reduce power supply noise coupling.

[0024] A filler layer 10, made of resin, is also provided between the aluminum foil shielding layer 6 and the power line 7 and signal line 8. The power line 7 includes an insulation layer 13 and a multi-strand oxygen-free copper conductor 12, with the insulation layer 13 covering the outside of the oxygen-free copper conductor 12. The signal line 8 includes an insulation layer 14 and a two-strand signal wire core 15, with the insulation layer 14 covering the outside of the signal wire core 15.

[0025] Specifically, signal line 8 and power line 7 are bundled separately to avoid signal crosstalk.

[0026] Both insulation layer 13 and insulation layer 2 are made of polyethylene.

[0027] Specifically, insulation layer 13 and insulation layer 14 are made of polyethylene, which has excellent insulation and wear resistance, effectively protecting the internal oxygen-free copper conductor 12 and signal wire core 15 from short circuits or damage caused by external factors. At the same time, polyethylene material also has certain anti-aging properties, which can extend the service life of the camera cable.

[0028] In this embodiment, one end of the camera cable is first connected to the camera device, and the other end is connected to the monitoring center or related receiving equipment. During the connection process, because ferrite magnetic rings 2 are sleeved at both ends of the cable body 1, common-mode interference can be effectively attenuated, reducing the interference of external electromagnetic fields on the internal signal of the camera cable. At the same time, the multi-layer shielding design, including an aluminum foil shielding layer 6, a braided copper mesh 5, a conductive cloth 4, and a Kevlar fiber layer 3, works together to achieve comprehensive shielding against high and low frequency mixed interference, ensuring clear and stable signal transmission from the camera.

[0029] During operation, power cable 7 provides a stable power supply to the camera, while signal cable 8 transmits the image signals captured by the camera. Because power cable 7 and signal cable 8 are effectively isolated by the cross-shaped insulating partition 9, interference from power supply noise on the signal cable is avoided, further improving signal purity and stability. Furthermore, the grounding copper strip 11 fixed to the cross-shaped insulating partition 9 also helps reduce power supply noise coupling, further enhancing overall performance.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multilayer shielded anti-interference camera cable comprising a cable body (1), characterized in that, Ferrite magnetic rings (2) are sleeved at both ends of the wire body (1). The interior of the wire body (1) consists of multiple shielding layers, cross-shaped insulating partitions (9), power lines (7) and signal lines (8). There are two sets of power lines (7) and signal lines (8), and the two sets of power lines (7) and signal lines (8) are alternately separated by cross-shaped insulating partitions (9). The cross-shaped insulating partitions (9), power lines (7) and signal lines (8) are covered with multiple shielding layers. The multiple shielding layers consist of Kevlar fiber layers (3), conductive cloth (4), braided copper mesh (5) and aluminum foil shielding layers (6). The aluminum foil shielding layers (6) are covered with braided copper mesh (5), the braided copper mesh (5) is covered with conductive cloth (4), and the conductive cloth (4) is covered with Kevlar fiber layers (3).

2. The multi-layer shielded anti-interference camera head cable of claim 1, wherein: One end of the cross-shaped insulating partition (9) is fixed with a grounding copper strip (11), and the cross-shaped insulating partition (9) is made of epoxy resin.

3. The multi-layer shielded anti-interference camera head cable of claim 1, wherein: A filler layer (10) is also filled between the aluminum foil shielding layer (6) and the power line (7) and signal line (8), and the filler layer (10) is resin.

4. The multi-layer shielded anti-interference camera head cable of claim 1, wherein: The power line (7) includes an insulation layer (13) and a multi-stranded oxygen-free copper conductor (12), the insulation layer (13) being wrapped around the oxygen-free copper conductor (12). The signal line (8) includes an insulation layer (14) and a two-stranded signal wire core (15), the insulation layer (14) being wrapped around the signal wire core (15).

5. A multi-layer shielded anti-tamper camera head cable according to claim 4, wherein: Both the first insulating layer (13) and the second insulating layer (14) are made of polyethylene.

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