automatic long -length optical fibre cable installation system

ANCIT WORKSHOPTorino, 30-31 March 1998

Automatic Long -LengthOptical Fibre Cable Installation System

NTT Access Network Systems Laboratories

Jiro Sogame


Contents

Background of this installation system Installation method Explanation of this installation system and it’s component machines Cable pulling machine Cable feeding machine Pulling rope winding machine


Plan For Fibre To The Home In NTT

19971998

1999

yearyear

year

2010 2000

100%

50%

20%

100%

year

Plan For Fibre To The Home In NTT

Plan for FTTH


Targets Of Cost ReductionTargets Of Cost Reduction

1997

Twice as much as metric line cost (Achievement of metallic line cost by -System)

1998~2000 FTTH cost will be reduced to metallic line level

Metallic line cost

ONUFOLTUser Facilities

(Excluding ONU)

Distribution Facilities

Feeder Facilities

Year0

1

5

10

1998 - 2000

ÉŒ-System

FTTH

FTTH

FTTH

(Target for further cost reduction)

1997


Area of This Installation SystemArea of This Installation System

distribution facilities

SLT

AURORA

FTM

ONU

Feeder facilities

customer facilities

NTT Central Office

requirement of economic or efficient underground cable installation method


Hight Density Optical Fiber CableHight Density Optical Fiber Cable

3000-Core Fiber Optic Cable

1000-Core Fiber Optic Cable

Outer diameter

Cable weight

30mm

0.85kg/m

Outer diameter

Cable weight

55mm

2.5kg/m


Installation method



1 One end cable pulling system

2 Distributed cable pulling system


Unsuitable for optical fibre cable in long lengthUnsuitable for optical fibre cable in long length

pulling direction

several km

Cable reel Cable pulling truck

One-end cable pulling system with truck

Ten

sion

Distance

Cable allowable force Å~exceeding force for cable

Pulling force


Distributed pulling system with machines

Ten

sion Cable allowable force

Distance

several km

Suitable for optical fibre cable in long length Suitable for optical fibre cable in long length

Pulling force

pulling direction


Installation Of Optical fibre cable in long length

Distributed pulling system is suitable


Installation method



Automatic pulling-rope winding machine

Automatic cable feeding machine

cable-pulling machine

Operator

Automatic Long -Length Optical Fiber Cable Installation SystemAutomatic Long -Length Optical Fiber Cable Installation SystemAutomatic Long -Length Optical Fiber Cable Installation SystemAutomatic Long -Length Optical Fiber Cable Installation System


Installation method



Cable Pulling MachineCable Pulling Machine

Cable-pulling machine


in manholeTension sensor

drive unit

control unit

Outline Of Cable Pulling MachineOutline Of Cable Pulling Machine

Pulling force

Pulling speed

2 kÇm

20 m/min

Time of setting up 10 min by 2 persons


Ten

sion

DistancePulling force

cable allowable force

pulling direction

Setting Position Of Pulling MachinesSetting Position Of Pulling MachinesSetting Position Of Pulling MachinesSetting Position Of Pulling Machines

Put machines at the point of below cable allowable force


installation length between machinesInstallation length between machines

Length between A and B

300-core fiber optic cable

600-core fiber optic cable

1000-core fiber optic cable 400m

600m

1000m

1st machine 2nd machine pulling direction

LengthA B


1st machine 2nd machine

pulling direction

this sensor (load cell ) detects the "tension"

2st machine starts working

1st machine starts working

1st 2nd 3rdload cell

Control method for automatic cable pulling

1 Starting

time

ten

sio

n

starting point

starting value


1st machine 2nd machine

pulling direction


2 On working and Stop

Puller controls pulling speed to maintain the mark value

time

mark value

ten

sio

n acceleration

deceleration



2 Stop

stop value

mark value

ten

sio

n acceleration

deceleration

no action

this sensor (load cell ) detects the "small tension"

2st machine stops working

1st machine stops working

load cell

1st 2nd 3rd1st machine 2nd machine

pulling direction


Characteristics

Jointing part between cable and rope passes through the belts on machine

We can install the cable without limit of lengthusing some machines which are interlocked

It is a safe machine for cable to stop installationin case of detecting over-load or race


Installation method



Automatic Cable Feeding MachineAutomatic Cable Feeding Machine

Automatic Cable Feeding Machine


Outline Of Cable Feeding MachineOutline Of Cable Feeding Machine

Cable Reel

Drive Unit

Control Unit

In Manhole

SensorOn the road

Feeding speedApplication of reel weight with cableTime of setting up

0Å`20 m/min

3000 kg

10 min by 2 persons


Detection Of Cable SlackDetection Of Cable Slack

velocityof cable

velocity orderto drive unit

acceleration acceleration

uniform velocity no direction

deceleration decelerationstop stop

cablea ray sender

a ray receiver

sensorsetting position detecting way


Installation method



Automatic Cable Feeding MachineAutomatic Cable Feeding Machine

Automatic pulling- rope winding machine


Automatic pulling-rope winding machineAutomatic pulling-rope winding machine

Winding speedApprication of rope diameter 4Å 1̀4mm

35 m/min (max)

Time of setting up 10 (min by 2 persons)

Rope reel

Traverser

controle unit

motorOn the road


Automatic Pulling-Rope Winding MachineAutomatic Pulling-Rope Winding Machine

in manhole

Motor continuously keeps pulling rope

in manhole

pulling ropepulling rope

2.pulling machine stops working1.pulling machine goes on working

1.motor can lift up the rope 2.motor can not lift up the rope

go on winding stop winding


Effect

current system this system

10.9

10%

ins

tall

ati

on

co

st

Cost reduction of this system

current system

this system

automatic long -length optical fibre cable installation system

Documents