CN201262845Y

CN201262845Y - Low noise electric wire

Info

Publication number: CN201262845Y
Application number: CNU2008200935771U
Authority: CN
Inventors: 罗兰; 周文林
Original assignee: SHENZHEN BAOXING WIRE CABLE MANUFACTURE CO Ltd
Current assignee: SHENZHEN BAOXING WIRE CABLE MANUFACTURE CO Ltd
Priority date: 2008-04-25
Filing date: 2008-04-25
Publication date: 2009-06-24
Anticipated expiration: 2018-04-25

Abstract

The utility model relates to a low noise wire, which comprises a metal conductor, a first insulating layer, a first low noise layer, a first shielding layer and a first sheath layer. The first insulating layer is sleeved and connected outside the metal conductor, the first low noise layer is sleeved and connected outside the first insulating layer, the first shielding layer is knitted or wound outside the first low noise layer, and the first sheath layer is sleeved and connected outside the first shielding layer. The metal conductor is a copper wire, a tin-plated copper wire or a copper foil wire and consists of multiple metal conductors which are stranded together regularly. The first insulating layer is made of polyethylene or polypropylene. The first low noise layer is made of conductive polyvinyl chloride. The first shielding layer is made by metal conductors which are tin-plated copper wires, and the tin-plated copper wires are knitted or wound around the first low noise layer. The first sheath layer is made of polyvinyl chloride or polyurethane.

Description

The low noise electric wire

Technical field

The utility model patent relates to a kind of electric wire, refers more particularly to a kind of low noise electric wire.

Background technology

Under extraneous factor effects such as bending, vibration, impact, variations in temperature, the pulse signal that electric wire itself produces is called the low noise electric wire less than the cable of 5mV.The low noise electric wire is used for the measurement of a plurality of fields tiny signals such as industry, medical science, national defence.The low noise electric wire is used for the low signal transmission and the mechanical action of being everlasting etc. (as impacting, vibration, bending, push-and-pull) under the extraneous factor effect, typical application comprises: Medical Devices (electrocardiograph, electroence phalograph) connect electric wire, transducer connects electric wire, microphone wire etc.

The reason that produces noise in the electric wire has: 1) the interior molecules friction of medium own; 2) change of wire capacitance; 3) piezoelectric effect of electric wire medium; 4) conductor and dielectric friction produce electric charge in the electric wire, promptly when the separation of generation electric charge during contact failure between conductor and the insulation.

In the prior art, squeeze into its level of noise of low noise electric wire of the very thin semiconductive material of one deck (thickness 0.05-0.35mm) at 2-3mV at insulating surface.The low noise electric wire that the utility model patent relates to, through special process method processing, its level of noise can reach below the 0.05mV.

The utility model content

The purpose of the utility model patent is to provide a kind of low noise electric wire, and its level of noise can reach below the 0.05mV.

For achieving the above object, a kind of low noise electric wire that the utility model patent relates to, it comprises a plain conductor, one first insulating barrier, one first low noise layer, one first screen, one first restrictive coating.This first insulating barrier is socketed in outside this plain conductor, and this first low noise layer is socketed in outside this first insulating barrier, and this first screen weaves or is wrapped in outside this first low noise layer, and this first restrictive coating is socketed in outside this first screen.

This plain conductor is copper cash, tinned wird or copper foil wire.

This plain conductor is twisting together of many plain conductor systematicness.

This first insulating barrier is polyethylene or polypropylene.

This first low noise layer is a conductive poly vinyl chloride.

This first screen is a plain conductor, and this plain conductor is a tinned wird, and this tinned wird is braiding or is wrapped on the first low noise layer.

This first restrictive coating is polyvinyl chloride or polyurethane.

For achieving the above object, a kind of low noise electric wire that the utility model patent relates to, when the production first low noise layer is socketed in outside this first insulating barrier, adopt a kind of process that vacuumizes, its vacuum degree control is-40～-100KPa between, this low noise layer and insulated combination together, this combination can prevent the mutual motion of two kinds of materials and the charging difference that produces, becomes elimination produces noise because of mechanical movement low noise wire rod.

Description of drawings

Fig. 1 is the structure chart of the utility model patent low noise electric wire.

Fig. 2 is the sectional view of the utility model patent low noise electric wire.

Embodiment

See also Fig. 1 to Fig. 2, a kind of low noise electric wire, it comprises a plain conductor 1, one first insulating barrier 2, one first low noise layer 3, one first screen 4, one first restrictive coating 5.

This first insulating barrier 2 is socketed in outside this plain conductor 1.

This first low noise layer 3 is socketed in outside this first insulating barrier 2.

This first screen 4 weaves or is wrapped in outside this first low noise layer 3.

Can separate between this first insulating barrier 2, the first low noise layer 3.

The thickness of this first low noise layer 3 is between 0.05-0.35mm.

This first restrictive coating 5 is socketed in outside this first screen 4.

This plain conductor is copper cash, tinned wird or copper foil wire.

This first insulating barrier is polyethylene or polypropylene.

This first low noise layer is a conductive poly vinyl chloride.

This first restrictive coating is polyvinyl chloride or polyurethane.

Because the existence and the special process of low noise layer are socketed on first insulating barrier first low noise layer, can effectively guarantee a kind of low noise electric wire that the utility model patent relates under extraneous factor effects such as bending, vibration, impact, variations in temperature, the pulse signal that electric wire itself produces is less than 0.05mV.Illustrate:

Differentiate that when manufacturing this low noise electric wire each parts is extremely important to the wire rod Effect on Performance in the wire rod, can use wire rod and lead noise test program among the ANSI/AAMI EC53-1995 5.5.4 to assess, select this program to be because its severe evaluation line wood property energy, in test, will produce very big noise result, and can guarantee the repeatability and the accuracy of test result.

Claims

1, a kind of low noise electric wire, it comprises a plain conductor, one first insulating barrier, one first low noise layer, one first screen, one first restrictive coating, it is characterized in that: this first insulating barrier is socketed in outside this plain conductor, this first low noise layer is socketed in outside this first insulating barrier, this first screen weaves or is wrapped in outside this first low noise layer, and this first restrictive coating is socketed in outside this first screen.

2, low noise electric wire according to claim 1 is characterized in that: this plain conductor is copper cash, tinned wird or copper foil wire.

3, low noise electric wire according to claim 1 and 2 is characterized in that: this plain conductor is twisting together of many plain conductor systematicness.

4, low noise electric wire according to claim 1 is characterized in that: this first insulating barrier is polyethylene or polypropylene.

5, low noise electric wire according to claim 1 is characterized in that: this first low noise layer is a conductive poly vinyl chloride.

6, low noise electric wire according to claim 1 is characterized in that: this first screen is a plain conductor, and this plain conductor is a tinned wird, and this tinned wird is braiding or is wrapped on the first low noise layer.

7, low noise electric wire according to claim 1 is characterized in that: this first restrictive coating is polyvinyl chloride or polyurethane.