High frequency common mode noise elimination wire harness for security alarm system

Abstract

The utility model discloses a kind of high-frequency common-mode noise elimination wire harness for security alarm system, it is related to information transmission technical field, to solve the problem of the effect limitation of shielding layer or filter in prior art in prior art to suppress noise, but these methods cost is higher, and effect is limited under high-frequency noise environment problem.Noise-resistant composite layer includes noise suppression layer and metal shielding layer, noise suppression layer is fixed outside tensile layer by spiral winding mode, by setting noise-resistant composite layer, including noise suppression layer and metal shielding layer, noise suppression layer is made of ferrite material, can effectively absorb high-frequency common-mode noise, metal shielding layer is made of copper wire material, further isolate external electromagnetic interference, significantly improve the anti-interference ability of wire harness under high-frequency noise environment, solve the effect limitation of shielding layer or filter in prior art under high-frequency noise environment problem.

Description

Technical Field

[0001] This utility model relates to the field of information transmission technology, specifically to a high-frequency common-mode noise cancellation harness for a security alarm system. Background Technology

[0002] In security alarm systems, the stability and anti-interference capability of signal transmission directly affect the reliability of the system. Since security systems typically operate in complex electromagnetic environments, high-frequency common-mode noise can easily couple into the signal transmission lines through the wiring harness, leading to signal distortion, false alarms, or system failure. Most existing wiring harness designs employ shielding layers or filters to suppress noise.

[0003] For example, authorization announcement number CN222214725U relates to a low-attenuation signal transmission harness for high-speed communication. It includes terminals, with several transmission components on one side of each terminal. One end of each transmission component is connected to a ground wire. The output end of the terminal is connected to the input end of the transmission component. Each terminal includes several conductors, with a filling layer between the conductors. An outer sheath surrounds the conductors, and a filter layer is located between the outer sheath and the conductors. The transmission components transmit signals, and the filter layer filters and absorbs electromagnetic field signals of non-transmission frequencies. In this low-attenuation signal transmission harness for high-speed communication, the transmission components transmit signals, the filter layer filters and absorbs electromagnetic field signals of non-transmission frequencies, and the filter further attenuates noise and other electromagnetic wave signals around the conductors.

[0004] The aforementioned technologies employ shielding layers or filters to suppress noise, but these methods are costly and have limited effectiveness in high-frequency noise environments. Therefore, there is an urgent market need to develop a high-frequency common-mode noise cancellation harness for security alarm systems to help people solve existing problems. Utility Model Content

[0005] The purpose of this invention is to provide a high-frequency common-mode noise cancellation harness for security alarm systems, in order to solve the problem mentioned in the background art that the existing technology uses shielding layers or filters to suppress noise, but these methods are costly and have limited effectiveness in high-frequency noise environments.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-frequency common-mode noise cancellation wiring harness for a security alarm system, comprising signal lines, wherein multiple signal lines are provided, and a heat insulation layer is provided on the outside of the multiple signal lines. A filling layer is provided inside the heat insulation layer and between the multiple signal lines. A tensile layer is provided outside the heat insulation layer. A noise-resistant composite layer is provided outside the tensile layer. The noise-resistant composite layer includes a noise suppression layer and a metal shielding layer. A grounding wire is provided on one side inside the metal shielding layer. A fireproof layer is provided outside the metal shielding layer. A wear-resistant layer is provided outside the fireproof layer.

[0007] Preferably, the signal line includes a conductor and an insulating layer, the insulating layer being fixed to the outside of the conductor by extrusion, and the insulating layer being made of polytetrafluoroethylene material.

[0008] Preferably, the filling layer is made of flame-retardant polyurethane foam, the heat insulation layer is made of silicone rubber, the heat insulation layer is fixed to the outside of the filling layer by wrapping, and the tensile layer is made of high-strength polyester fiber, the tensile layer is fixed to the outside of the heat insulation layer by spiral winding.

[0009] Preferably, the noise suppression layer is fixed to the outside of the tensile layer by spiral winding, the noise suppression layer is made of ferrite material, and the metal shielding layer is fixed to the outside of the noise suppression layer by spiral winding, the metal shielding layer is made of copper wire material.

[0010] Preferably, the grounding wire is run through the metal shielding layer and in contact with the metal shielding layer, and one end of the grounding wire extends out of the metal shielding layer for grounding.

[0011] Preferably, the fireproof layer is fixed to the outside of the metal shielding layer by extrusion, and the fireproof layer is made of flame-retardant polyvinyl chloride material.

[0012] Preferably, the wear-resistant layer is fixed to the outside of the fireproof layer by extrusion, and the wear-resistant layer is made of polyurethane material.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, by setting an anti-noise composite layer, including a noise suppression layer and a metal shielding layer, the noise suppression layer is made of ferrite material, which can effectively absorb high-frequency common-mode noise, and the metal shielding layer is made of copper wire material, which further isolates external electromagnetic interference, significantly improving the anti-interference capability of the wire harness in a high-frequency noise environment, and solving the problem that the shielding layer or filter in the prior art has limited effect in a high-frequency noise environment.

[0015] (2) In this utility model, by setting a grounding wire to contact and ground the metal shielding layer, a low-impedance loop is formed, which enhances the noise cancellation effect, further improves the stability and reliability of signal transmission, reduces the possibility of signal distortion and false alarms, and improves the overall performance of the security alarm system.

[0016] (3) In this utility model, by adopting a multi-layer structure design, including a heat insulation layer, a tensile layer, a fireproof layer, and a wear-resistant layer, not only is the mechanical strength and durability of the wire harness improved, but its adaptability in complex environments is also enhanced. The heat insulation layer and the fireproof layer effectively prevent damage to the wire harness from external high temperatures and fires, while the wear-resistant layer protects the wire harness from mechanical damage, extends the service life of the wire harness, and reduces maintenance costs. Attached Figure Description

[0017] Figure 1 This is a front view of a high-frequency common-mode noise cancellation harness for a security alarm system according to this utility model;

[0018] Figure 2 This is a front sectional view of the present invention;

[0019] Figure 3 This is a schematic diagram of the signal line structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the noise-reducing composite layer structure of this utility model.

[0021] In the diagram: 1. Signal line; 101. Conductor; 102. Insulation layer; 103. Filler layer; 2. Heat insulation layer; 3. Tensile layer; 4. Noise-resistant composite layer; 401. Noise suppression layer; 402. Metal shielding layer; 403. Grounding wire; 5. Fireproof layer; 6. Wear-resistant layer. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-3 This utility model provides an embodiment of a high-frequency common-mode noise cancellation wiring harness for a security alarm system, including signal lines 1, of which multiple signal lines 1 are provided. Each signal line 1 includes a conductor 101 and an insulation layer 102. The insulation layer 102 is fixed to the outside of the conductor 101 by extrusion. The insulation layer 102 is made of polytetrafluoroethylene (PTFE), which is resistant to high temperatures and corrosion, making it suitable for use in complex environments. A heat insulation layer 2 is shared on the outside of the multiple signal lines 1. A filler layer 103 is provided inside the heat insulation layer 2 and between the multiple signal lines 1. The filler layer 103 is made of flame-retardant polyurethane foam, which has good filling and cushioning properties, can fix the position of the signal lines, and reduce vibration and friction. The heat insulation layer 2 is made of silicone rubber, which has excellent heat insulation properties and can prevent the influence of external high temperatures on the signal lines. The heat insulation layer 2 is fixed to the outside of the filler layer 103 by wrapping.

[0024] Please see Figure 2 and Figure 4 A tensile layer 3 is provided outside the heat insulation layer 2. The tensile layer 3 is made of high-strength polyester fiber material. Polyester fiber has extremely high tensile strength and can withstand large mechanical tensile forces, improving the tensile strength of the signal line. The tensile layer 3 is fixed to the outside of the heat insulation layer 2 by spiral winding. A noise-resistant composite layer 4 is provided outside the tensile layer 3. The noise-resistant composite layer 4 includes a noise suppression layer 401 and a metal shielding layer 402. The noise suppression layer 401 is fixed to the outside of the tensile layer 3 by spiral winding. The noise suppression layer 401 is made of ferrite material and is used to absorb high-frequency common-mode noise. The metal shielding layer 402 is fixed to the outside of the noise suppression layer 401 by spiral winding. The metal shielding layer 402 is made of copper wire material and is used to further isolate external electromagnetic interference. An internal grounding wire 403 is installed on one side. The grounding wire 403 passes through the metal shielding layer 402 and contacts the metal shielding layer 402. One end of the grounding wire 403 extends out of the metal shielding layer 402 and is grounded, forming a low-impedance loop to enhance the noise cancellation effect. A fireproof layer 5 is installed on the outside of the metal shielding layer 402. The fireproof layer 5 is fixed to the outside of the metal shielding layer 402 by extrusion. The fireproof layer 5 is made of flame-retardant polyvinyl chloride material. Flame-retardant polyvinyl chloride has excellent fire resistance and can protect the wire harness in high temperature or fire conditions. A wear-resistant layer 6 is installed on the outside of the fireproof layer 5. The wear-resistant layer 6 is fixed to the outside of the fireproof layer 5 by extrusion. The wear-resistant layer 6 is made of polyurethane material. Polyurethane has excellent wear resistance and tear resistance and can protect the wire harness from mechanical damage.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-frequency common-mode noise cancellation harness for a security alarm system, comprising a signal line (1), characterized in that: The signal lines (1) are provided in multiple ways. A heat insulation layer (2) is provided on the outside of the multiple signal lines (1). A filling layer (103) is provided inside the heat insulation layer (2) and between the multiple signal lines (1). A tensile layer (3) is provided outside the heat insulation layer (2). A noise-resistant composite layer (4) is provided outside the tensile layer (3). The noise-resistant composite layer (4) includes a noise suppression layer (401) and a metal shielding layer (402). A grounding wire (403) is provided on one side inside the metal shielding layer (402). A fireproof layer (5) is provided outside the metal shielding layer (402). A wear-resistant layer (6) is provided outside the fireproof layer (5).

2. The high-frequency common-mode noise cancellation harness for a security alarm system according to claim 1, characterized in that: The signal line (1) includes a conductor (101) and an insulating layer (102). The insulating layer (102) is fixed to the outside of the conductor (101) by extrusion. The insulating layer (102) is made of polytetrafluoroethylene material.

3. A high-frequency common-mode noise cancellation harness for a security alarm system according to claim 1, characterized in that: The filling layer (103) is made of flame-retardant polyurethane foam material, the heat insulation layer (2) is made of silicone rubber material, the heat insulation layer (2) is fixed to the outside of the filling layer (103) by wrapping, the tensile layer (3) is made of high-strength polyester fiber material, and the tensile layer (3) is fixed to the outside of the heat insulation layer (2) by spiral winding.

4. A high-frequency common-mode noise cancellation harness for a security alarm system according to claim 1, characterized in that: The noise suppression layer (401) is fixed to the outside of the tensile layer (3) by spiral winding. The noise suppression layer (401) is made of ferrite material. The metal shielding layer (402) is fixed to the outside of the noise suppression layer (401) by spiral winding. The metal shielding layer (402) is made of copper wire material.

5. A high-frequency common-mode noise cancellation harness for a security alarm system according to claim 1, characterized in that: The grounding conductor (403) passes through the metal shielding layer (402) and is in contact with the metal shielding layer (402). One end of the grounding conductor (403) extends out of the metal shielding layer (402) and is grounded.

6. A high-frequency common-mode noise cancellation harness for a security alarm system according to claim 1, characterized in that: The fireproof layer (5) is fixed to the outside of the metal shielding layer (402) by extrusion. The fireproof layer (5) is made of flame-retardant polyvinyl chloride material.

7. A high-frequency common-mode noise cancellation harness for a security alarm system according to claim 1, characterized in that: The wear-resistant layer (6) is fixed to the outside of the fireproof layer (5) by extrusion, and the wear-resistant layer (6) is made of polyurethane material.

Images