CN102280177A

CN102280177A - Special type low-noise cable for sensor

Info

Publication number: CN102280177A
Application number: CN 201110132984
Authority: CN
Inventors: 李津津; 韦玮; 毕建金; 李素红; 陈芳伟; 夏云怀; 于健; 柳剑; 王玉芳
Original assignee: Tianjin No609 Cable Co Ltd
Current assignee: Tianjin No609 Cable Co Ltd
Priority date: 2011-05-23
Filing date: 2011-05-23
Publication date: 2011-12-14
Anticipated expiration: 2031-05-23
Also published as: CN102280177B

Abstract

The invention relates to a special type low-noise cable for signal transmission of a sensor under the environment of larger noise and higher electromagnetic radiation of an engine and the like. In the special type low-noise cable, a first sound absorbing layer is wrapped outside an inner conductor; a first insulation layer and a second insulation layer are extruded out of the first sound absorbing layer sequentially; a second sound absorbing layer is wrapped outside the second insulation layer to form insulation wire cores; the two insulation wire cores are stranded; and a third sound absorbing layer, a weaving shielding layer and an extrusion sheath are wrapped outside the insulation wire cores sequentially. The special type low-noise cable is characterized in that: the sound absorbing layers are provided with graphite belts, and are wrapped by the graphite belts firmly to reduce gaps between the insulation layers and metal, so that the structure is more stable; the insulation layers are made of crosslinking ethylene-tetrafluoroethylene copolymers; a lamella extrusion process is adopted to ensure high electric insulation performance and relieve weight; a dual-layer extrusion mode is adopted to improve shear resistance, and the cable can meet the requirement of electric properties of impedance, capacitance, attenuation and the like; and the sheath is made of the crosslinking ethylene-tetrafluoroethylene copolymers, and is high in radiating resistance, high and low temperature resistance, flame retardance and chemical resistance.

Description

The extraordinary low noise cable of transducer

Technical field

The present invention relates to a kind of cable, particularly a kind of transmission that is applicable to the environment lower sensor signals that noise is big, electromagnetic radiation is stronger such as engine prevents the extraordinary low noise cable of transducer that extraneous mechanicalness noise disturb sensor signal transmits.

Background technology

Common sensor cable does not generally possess the mechanicalness noise of inhibition, radiation hardness function, is unfavorable for using under big noise, the high radiation environment, and transmission signals is vulnerable to external interference and distortion.

Summary of the invention

Deficiency in view of prior art exists the invention provides a kind of extraordinary low noise cable of transducer with high-low temperature resistant, low noise, in light weight, anti-irradiation, characteristics such as volume is little, chemical resistance good, softness.

The present invention for achieving the above object, the scheme of being taked is: the extraordinary low noise cable of a kind of transducer, it is characterized in that: the outer wrapped ground floor sound absorbing layer of the conductor that included, outside the ground floor sound absorbing layer, extrude ground floor insulation, second layer insulation successively, wrapped second layer sound absorbing layer constitutes insulated wire cores outside second layer insulation, also comprise the 3rd layer of sound absorbing layer, screen and sheath, two described insulated wire cores are stranded, outside it wrapped successively the 3rd layer of sound absorbing layer, woven shield, extrude sheath. [0005]Characteristics of the present invention are: inner wire is the silver-plated copper conductor of electrical property excellence, and D.C. resistance is little, electrical property excellence under the high frequency, than ordinary copper conductor, tin-coated copper conductor easily weld, resistance is little, temperature resistant grade is high.Sound absorbing layer is a graphite tape, graphite has good sound absorption function, can effectively reduce the mechanicalness noise of external environment, prevent that signal of communication is interfered, sound absorbing layer adopts the fastening wrapped form of graphite tape, reduced insulation and intermetallic slit, structure is more stable, reduces to vibrate the machinery noise that causes.Insulating barrier is cross-linked ethylene-TFE copolymer, adopts the thin layer expressing technique, has both guaranteed excellent electrical insulation properties, alleviated weight again, adopt bilayer to extrude form, improved fingerprinting stress, and can satisfy the requirement of electric properties such as its impedance, electric capacity and decay.Screening braid adopts can resistant to elevated temperatures silver-coated copper wire, has not only reduced the influence of external interference under the high frequency, and has adopted the multiply type of weave to increase flexibility.Sheath is cross-linked ethylene-TFE copolymer, and it has, and the radiation hardness ability is strong, high-low temperature resistant, good flame resistance, chemical-resistance excellence, adopts the thin layer expressing technique, has both guaranteed excellent electrical insulation properties, has alleviated weight again.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is an insulated wire cores structural representation of the present invention.

Embodiment

As shown in Figure 1, 2, the extraordinary low noise cable of a kind of transducer, the outer wrapped ground floor sound absorbing layer 1-2 of the conductor 1-1 that included, outside ground floor sound absorbing layer 1-2, extrude ground floor insulation 1-3, second layer insulation 1-4 successively, wrapped second layer sound absorbing layer 1-5 constitutes insulated wire cores 1 outside second layer insulation 1-4, also comprise the 3rd layer of sound absorbing layer 2, screen 3 and sheath 4, two described insulated wire cores 1 are stranded, outside it wrapped successively the 3rd layer of sound absorbing layer 2, braiding one deck silver-coated copper wire braid 3, extrude sheath 4.Inner wire 1-1 adopts the silver-plated copper conductor, and ground floor sound absorbing layer 1-2, second layer sound absorbing layer 1-5, the 3rd layer of sound absorbing layer 2 adopt graphite material.Ground floor insulation 1-3, second layer insulation 1-4, sheath 4 adopt cross-linked ethylene-TFE copolymer.

Claims

1. extraordinary low noise cable of transducer, it is characterized in that: the outer wrapped ground floor sound absorbing layer (1-2) of the conductor that included (1-1), outside ground floor sound absorbing layer (1-2), extrude ground floor insulation (1-3) successively, second layer insulation (1-4), wrapped second layer sound absorbing layer (1-5) constitutes insulated wire cores (1) outside second layer insulation (1-4), also comprise the 3rd layer of sound absorbing layer (2), screen (3) and sheath (4), two described insulated wire cores (1) are stranded, wrapped successively the 3rd layer of sound absorbing layer (2) outside it, woven shield (3), extrude sheath (4).

2. the extraordinary low noise cable of transducer according to claim 1 is characterized in that: described ground floor sound absorbing layer (1-2), second layer sound absorbing layer (1-5), the 3rd layer of sound absorbing layer (2) adopt graphite material.

3. the extraordinary low noise cable of transducer according to claim 1 is characterized in that: described ground floor insulation (1-3), second layer insulation (1-4), sheath (4) adopt cross-linked ethylene-TFE copolymer.