CN110504064A

CN110504064A - Cable shielding construction

Info

Publication number: CN110504064A
Application number: CN201910665848.9A
Authority: CN
Inventors: 陈念; 孙文静; 刘心灵
Original assignee: China Aeronautical Radio Electronics Research Institute
Current assignee: China Aeronautical Radio Electronics Research Institute
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2019-11-26

Abstract

The invention discloses a kind of cable shielding constructions, include core of a cable, conducting wire and grounding point, and grounding point is located at the both ends of core of a cable, and conducting wire is wrapped on core of a cable, and the both ends of conducting wire are separately connected a grounding point.The present invention makes conducting wire form double-twisted structure with core of a cable, can isolate the DM EMI of bunch of cables and conducting wire, and making radiation, perhaps sensitive cable beam and extraneous influencing each other reduce to achieve the purpose that reduce bunch of cables interference or sensibility.

Description

Cable shielding construction

Technical field

The present invention relates to a kind of cable shielding constructions, the anti-interference isolation for naked cable.

Background technique

In the design of electronic product, arrangement interconnection cable is required outside cabinet inside and cabinet, in various situations Under, due to weight, space and flexible requirement, these cables can not all do complete shielding processing, more seriously, mutually The shielding design effect for joining cable is limited, is unable to reach the requirement of standard.Meanwhile in EMC test process, due to point of cable Branch and combined situation it is sufficiently complex, need to check the Electromagnetic Launching situation of system cable, need it is a kind of for cable can The locality shielding means leaned on.At this stage, due to the face shaping multiplicity of bunch of cables, existing anti-wave sleeve and shielded layer can not expire The cable of foot difference sizes and appearance, meanwhile, unbroken loop ground connection that anti-wave sleeve and shielded layer need and full frequency band low-resistance over the ground Anti- requirement is also difficult to meet, and significantly limits the use scope and effect of anti-wave sleeve and shielded layer in actual products.Cause This, one kind can adapt to various different shape bunchs of cables, dismounts and be grounded convenient cable shielding construction, is designing and is testing In have biggish effect.

Summary of the invention

Goal of the invention of the invention is to provide a kind of cable shielding construction, by radiation or sensitive cable harness The conducting wire for winding single layer or multilayer two sides earth forms double-twisted structure with core of a cable, can isolate core of a cable and conducting wire DM EMI, make radiation or sensitive cable harness and extraneous reductions that influence each other, interfered to reach and reduce bunch of cables Or the purpose of sensibility.

Goal of the invention of the invention is achieved through the following technical solutions:

A kind of cable shielding construction, includes core of a cable, conducting wire and grounding point, and grounding point is located at the two of core of a cable End, conducting wire are wrapped on core of a cable, and the both ends of conducting wire are separately connected a grounding point.

Core of a cable by one or more signal line groups at.

Preferably, core of a cable is with or without double-twisted structure.

Preferably, core of a cable is with or without shielding construction.

Preferably, conducting wire is single more, and multiple conducting wires are wrapped on core of a cable by level, and grounding point is located at cable On the difference at the both ends of beam.

Preferably, the outer layer of conducting wire has insulating layer.

Detailed description of the invention

Fig. 1 is the cable shielding construction schematic diagram of winding of single layer.

Fig. 2 is the cable shielding construction schematic diagram of Double wound.

Specific embodiment

The present invention is described in further detail with reference to the accompanying drawings and examples.

Embodiment 1

As shown in Figure 1, cable shielding construction shown in the present embodiment includes: core of a cable 1, conducting wire 2 and 3 groups of grounding point At.

Core of a cable 1 is the interconnection cable beam in electronic product cabinet or outside cabinet, and core of a cable 1 has more signals Line, and there are common-mode signal transmittings perhaps can have double-twisted structure or shielding knot vulnerable to common-mode signal interference core of a cable 1 Structure.

Grounding point 3 is located at the both ends of core of a cable 1, is the grounding point of conducting wire 2 relative to the earth.

Conducting wire 2 is wrapped on core of a cable, and the both ends of conducting wire are separately connected a grounding point, and is formed with bunch of cables 1 double Tangle structure.The outer layer of conducting wire 2 has insulating layer.

Embodiment 2

As shown in Fig. 2, embodiment 2 be shown in cable shielding construction include: core of a cable 1, conducting wire 21,22 He of conducting wire Grounding point 31, grounding point 32 form.

Grounding point 31 is located at the both ends of core of a cable 1, is the grounding point of conducting wire 21 relative to the earth.Grounding point 32 is located at The both ends of core of a cable 1 are the grounding point of conducting wire 22 relative to the earth

Conducting wire 21 is wrapped on core of a cable 1, and the both ends of conducting wire 21 are separately connected a grounding point 31, and conducting wire 22 is wrapped in On core of a cable 1, the both ends of conducting wire 22 are separately connected a grounding point 32, and conducting wire 21 and conducting wire 22, which are formed in, is wrapped in cable Two layers up and down on beam 1, and double-twisted structure is formed with bunch of cables 1.The outer layer of conducting wire 21 and conducting wire 22 has insulating layer.

Claims

1. a kind of cable shielding construction includes core of a cable, conducting wire and grounding point, it is characterised in that grounding point is located in cable The both ends of harness, conducting wire are wrapped on core of a cable, and the both ends of conducting wire are separately connected a grounding point.

2. a kind of cable shielding construction according to claim 1, it is characterised in that core of a cable is by one or more letters Number line composition.

3. a kind of cable shielding construction according to claim 1, it is characterised in that core of a cable is with or without multiple twin Structure.

4. a kind of cable shielding construction according to claim 1, it is characterised in that core of a cable is with or without shielding Structure.

5. a kind of cable shielding construction according to claim 1, it is characterised in that conducting wire is single more, and multiple conducting wires are pressed Level is wrapped on core of a cable, and grounding point is located on the difference at the both ends of core of a cable.

6. a kind of cable shielding construction according to claim 1, it is characterised in that the outer layer of conducting wire has insulating layer.