a new era in local position referencing - guidance …€¦ · · 2016-04-07a new era in local...

A New Era in Local Position Referencing

Sasha HeriotBusiness Development Manager

Tel: +44 116 229 2600 Web: www.guidance.eu.com

Collaboration

Guidance Marine

•Local PRS Sensor designer and manufacturer

Bernhard Schulte Ship Management

•Vessel owner

Marine Technologies

•DP Integrator

Sasha Heriot – Business Development ManagerTom Coggins - Microwave Technologies Group ManagerMilijan Mudrinic -Software Technologies Group ManagerAndrew Stead - Head of Business Development

Hendrik Busshoff - Offshore Marine Superintendent

Ole M Husøy responsible for sales & design


The Ocean Zephyr

Based in Emden

Services the BARD1 wind farm in the North Sea

Converted PSV

Accommodation

Motion compensated walk to work gangway

Position reference systems: DGPS and CyScan


DP local position reference sensors

Measure relative positionSensor

on vessel

Target on fixed

station

DP System

Hold position Move safely & precisely



Up to 10km

On Vessel Fixed Station



Up to 1km

On Vessel Responder target on platform



Up to 2.5km

On Vessel Reflector target on platform


Offshore oil vs offshore wind

http://strangesounds.org/wp-content/uploads/2013/08/Germany-BARD-Offshore-1-Completed-Ahead-Of-Schedule.jpg

Mars oil field, Gulf of Mexico2 platforms

BARD1 Wind Farm, North Sea80 turbines

1-2 approaches per day1-2 targets per platform

50 approaches per dayTargets on every turbine - £££


Reflector target

location

Navigating in wind farms

• Direct line of sight between the laser sensor and reflector

• The reflector must ideally be at a similar height to the sensor

• The reflector should be well maintained and clean

• No other reflectors should be in the vicinity of the target

Laser PRS operation requirements

Risk of false reflection and walk off incidents if• CyScan not set up correctly• Poor quality targets are used


Demo


Are targets the answer?

Tube/Tape£

High Maintenance

5 years life

High risk of false reflections

Prism£££

High Maintenance

20 year life

Risk of false reflections


Use the environment as your target

Environment

£0

NO Maintenance

>20 years

No risk of false reflections


What is ?

• fixed beam radar sensors operating in the license exempt short range device band of 24GHz

Targetless object detection and accurate distance measurement

• a warning is output when a potential hazard is detected within user defined protection zones

• An accurate range measurement is displayed on the user interface via a web browser

Measures range to the nearest object

• 11°(+/-5.5°) elevation and two options of azimuth beam: 11°(Narrow Beam) and 110° (Wide Beam)

Wide beam and narrow fixed beam options


Dynamic positioning with RangeGuard

Ships network

Ships DP system – Not for this trial

RangeGuardController

Display on Bridge


Installation on the Ocean Zephyr

15m

• Wide beam sensors• IP video cameras

Beam overlap gives range 8 meters to >> 50 meters


Bridge display

Different Views available


How is raw data processed?

All radar return signals are detected – peaks in signal strength

Radar Data processed in control box

Target tracking algorithm used to monitor and track peaks

Can track 10 peaks simultaneously

Can Lock onto an interesting peak –largest or nearest


Range [m]

Sign

al L

evel

[d

B]]

FFT Data – Approach to Sub Station

Camera View

RangeGuard “sees” peaks corresponding to the legs

What does raw data look like?

Up to 10 peaks can be tracked simultaneously Can lock onto nearest or biggest peak


Sea trials - Close Range Approach

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Approach to Wind Turbine

Station keeping

Station keeping

Station keeping

Vessel moves

Vessel moves

Dis

tan

ce t

o t

arge

t [m

]

Time[hh:mm:ss]

Camera View

Camera View


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Approach, Dwell, Depart Sub-Station

Sea Trials – Long Range Manouver

Camera View

Dis

tan

ce t

o t

arge

t [m

]

Time[hh:mm:ss]

Camera View


DP Integration

Other sensors

Calculates position using sensor location

and range data

Controls thrusters

DP system

Display on bridge

Tracks up to 10 peaks per sensor

Outputs Range dataDP string format

Data sampled 3 times per second

Data sampled 3 times per second


Benefits of RangeGuard System

No targets – uses the environment

• Vessel independent of installation

• No false reflections

• No maintenance

• Reduces costs

Improves safety

• Additional form of redundancy

Increases efficiencies

• Decreases turnaround times


What’s next?

The first vessel to have RangeGuard fully DP integrated will be ready to sail in 2016 – the Windea La Cour


Contacts

[email protected]@guidance.eu.com

[email protected]

Ole Morten Husoey: [email protected]

Thanks for listening!

[email protected]

a new era in local position referencing - guidance …€¦ · · 2016-04-07a new era in local...

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