CN201707962U

CN201707962U - Low-noise electrocardio-wire

Info

Publication number: CN201707962U
Application number: CN2009202605728U
Authority: CN
Inventors: 罗兰; 许高华
Original assignee: SHENZHEN BAOXING WIRE CABLE MANUFACTURE CO Ltd
Current assignee: SHENZHEN BAOXING WIRE CABLE MANUFACTURE CO Ltd
Priority date: 2009-11-19
Filing date: 2009-11-19
Publication date: 2011-01-12
Anticipated expiration: 2019-11-19

Abstract

A low-noise electrocardio-wire mainly comprises a plurality of low-noise semi-conductive core wire, an interstitial wire, a metal earth wire, a shielding layer, a covering layer and a sheath layer, wherein the low-noise semi-conductive core wire mainly consists of a metal lead, an insulating layer and a low-noise semi-conductive layer, the insulating layer is sheathed outside the metal lead, the low-noise semi-conductive layer is sheathed outside the insulating layer, the plurality of low-noise semi-conductive core wire is integrated with the metal earth wire into a round wire harness, the interstitial wire is arranged at the center of the round wire harness, the shielding layer is wound outside the round wire harness, the covering layer is covered outside the shielding layer, and the sheath layer is sheathed outside the covering layer.

Description

Low noise electrocardio electric wire

Technical field

The utility model relates to a kind of low noise electrocardio electric wire.

Background technology

Low noise electrocardio electric wire is mainly used in the low signal transmission, be everlasting mechanical action (as impacting vibration, bending, push-and-pull) etc. use under the external condition, typical application comprises: Medical Devices (electrocardiogram monitor, brain electricity patient monitor) connect electric wire, transducer connects electric wire, microphone wire etc.

Electric wire is under extraneous factor effects such as bending, vibration, impact, variations in temperature, and the pulse signal that is produced by electric wire itself is called low noise cable less than the cable of 5mV.Low noise electrocardio electric wire is mainly used in the measurement of a plurality of fields tiny signals such as industry, medical science, national defence.

The main cause that electric wire produces noise 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.

Existing low noise electrocardio electric wire mainly realizes that by squeeze into the very thin semiconductive material of one deck (thickness 0.05-0.35mm) at insulating surface its level of noise is at 2-3mV.

The utility model content

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

For achieving the above object, the utility model provides a kind of low noise electrocardio electric wire, its mainly by: some low noise semiconductive heart yearns, an interstitial wire, a metal earth, a screen, a belting layer, a restrictive coating are formed.

This low noise semiconductive heart yearn mainly is made up of plain conductor, insulating barrier, low noise semi-conductive layer, and this insulating barrier is socketed in outside this plain conductor, and this low noise semi-conductive layer is socketed in outside this insulating barrier.

These some low noise semiconductive heart yearns and this metal earth assemble a circular wire harness, this interstitial wire is arranged on the center of this circle wire harness, this screen is wrapped in outside this circle wire harness, and this belting layer is coated on outside this screen, and this restrictive coating is socketed in outside this belting layer.

The advantage of the utility model low noise electrocardio electric wire is: its existing its level of noise of low noise electrocardio electric wire of comparing by squeeze into the very thin semiconductive material of one deck (thickness 0.05-0.35mm) at insulating surface can reduce greatly, the level of noise of existing low noise electrocardio electric wire is at 2-3mV, and the level of noise of low noise electrocardio electric wire of the present utility model is below 0.05mV.

Description of drawings

Fig. 1 be the utility model low noise electrocardio electric wire structural representation.

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

Embodiment

See also Fig. 1 to Fig. 2, a kind of low noise electrocardio electric wire, it mainly comprises: some low noise semiconductive heart yearns 1, an interstitial wire 2, a metal earth 3, a screen 4, a belting layer 5, a restrictive coating 6.

This low noise semiconductive heart yearn 1 mainly is made up of plain conductor 11, insulating barrier 12, low noise semi-conductive layer 13, and this insulating barrier 12 is socketed in outside this plain conductor 11, and this low noise semi-conductive layer 13 is socketed in outside this insulating barrier 12.

These some low noise semiconductive heart yearns 1 assemble a circular wire harness with this metal earth 3, this interstitial wire 2 is arranged on the center of this circle wire harness, this screen 4 is wrapped in outside this circle wire harness, and this belting layer 5 is coated on outside this screen 4, and this restrictive coating 6 is socketed in outside this belting layer 5.

The material of this plain conductor 11 and metal earth 3 can be stranded tinned wird, can also be bare copper wire or copper foil wire or other metal synthesising wire, and tinned wird can prevent the copper wire oxidation.

The thickness of this low noise semi-conductive layer 13 is between 0.05-0.35mm.

This metal earth 3 twisting together for many plain conductor systematicness.

The material of this insulating barrier 12 is selected from any one material in the following listed plastic material:

PE (Polythene) polyethylene;

PP (Polypropylene) polypropylene;

PA (Polyamide) nylon (polyamide).

The material of this low noise semi-conductive layer 13 is selected from any one material in the following listed plastic material:

Conductive pvc conductive polyvinyl chloride;

Conductive PE conductive polyethylene.

The material of this interstitial wire 2 is selected from any one in the following listed material:

Polyvinyl chloride, polyethylene or polypropylene adhesive tape.

This belting layer 5 is raw material band, paper tape or nonwoven fabrics.

The material of this restrictive coating 6 is selected from any one in the following listed material: polyvinyl chloride or polyurethane.

The utility model is because the existence and the special process of low noise semi-conductive layer 13 are socketed on first insulating barrier 12 the first low noise semi-conductive layer 13, can effectively guarantee a kind of low noise electrocardio 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.

In addition when production insulating barrier 12 is socketed in outside the plain conductor 11, adopt a kind of process that vacuumizes and the warm water type of cooling of lowering the temperature gradually, its vacuum degree control is-40～-100KPa between, water temperature is by 70 ℃ of slow cooling to 20 ℃, this insulating barrier 12 is combined with plain conductor 11, and this combination can prevent the generation of the mutual motion of metal wire and insulating barrier.

Appraisal procedure of the present utility model is as follows:

The key of design low noise wire rod is to differentiate that each parts is to the wire rod Effect on Performance in the wire rod, wire rod and lead noise test program among the utilization ANSI/AAMI EC53-1995 5.5.4 are assessed, 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.

In addition, all models are placed on 1 week in the environment of 27 ℃ and relative humidity 50% before test in the utility model, and the weight of counterweight is 40 times of one foot long wire rod weight in the test.

Claims

1. low noise electrocardio electric wire, it is characterized in that: it mainly is made up of some low noise semiconductive heart yearns, an interstitial wire, a metal earth, a screen, a belting layer, a restrictive coating; This low noise semiconductive heart yearn mainly is made up of plain conductor, insulating barrier, low noise semi-conductive layer, and this insulating barrier is socketed in outside this plain conductor, and this low noise semi-conductive layer is socketed in outside this insulating barrier; These some low noise semiconductive heart yearns and this metal earth assemble a circular wire harness, this interstitial wire is arranged on the center of this circle wire harness, this screen is wrapped in outside this circle wire harness, and this belting layer is coated on outside this screen, and this restrictive coating is socketed in outside this belting layer.

2. a kind of low noise electrocardio electric wire according to claim 1 is characterized in that: the material of this plain conductor and metal earth is selected from any one material in the following listed plastic material, stranded tinned wird or bare copper wire or copper foil wire.

3. a kind of low noise electrocardio electric wire according to claim 1 is characterized in that: the material of this insulating barrier is selected from any one material in the following listed plastic material, polyethylene or polypropylene or nylon.

4. a kind of low noise electrocardio electric wire according to claim 1 is characterized in that: this low noise semi-conductive layer is conductive poly vinyl chloride or conductive poly ethene.

5. a kind of low noise electrocardio electric wire according to claim 1 is characterized in that: the material of this interstitial wire is selected from any one in the following listed material, polyvinyl chloride, polyethylene or polypropylene adhesive tape.

6. a kind of low noise electrocardio electric wire according to claim 1, it is characterized in that: this metal earth is twisting together of many plain conductor systematicness.

7. a kind of low noise electrocardio electric wire according to claim 1, it is characterized in that: this belting layer is raw material band, paper tape or nonwoven fabrics.

8. a kind of low noise electrocardio electric wire according to claim 1 is characterized in that: the material of this restrictive coating is selected from any one in the following listed material, polyvinyl chloride or polyurethane.