GENERAL ACOUSTICS©

UltraLab®-Series

Sensing of Water Level, Waves and Bottom Contours

Remote Sensing Technology based on

Superior Ultrasound Measurement

GENERAL ACOUSTICS GmbH, Germanywww.generalacoustics.com

GENERAL ACOUSTICS©

Lab Measurement EngineeringRemote Sensing of Water Levels, Waves and Distances for Lab Applications

Hydraulic Laboratories

Ship Model Basins

Simulation Facilities of Channels and Waterways

GENERAL ACOUSTICS©

Lab Measurement Engineering

Technology

a) remote sensing of waves and water levels on the basis of ultrasoundvia air (products ULS, ULS Advanced)

b) distance measurement on the basis of ultrasound via water (product UWS)

Innovation/Unique selling proposition

• accuracy of distance measuring• resolution • measuring of wave contours up to breaking waves • fast measurement• free of calibration

UserLaboratories, Science- and Development Centres:

Hydraulic Laboratories, Ship Model Basins, Towing Tanks, Simulation Facilities of Channels and Waterways, Universities, Navy-Institutes

References HSVA (D), SVA Potsdam (D), MARIN (NL), French Navy (F), etc.

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UltraLab® ULSHighly accurate remote sensing of water level and waves for.....

hydraulic labs

ship model basins

flumes

towing tanks

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UltraLab® ULS HF5-AHighly accurate remote sensing of steep and very fast moving waves with 4 synchronised sensors

hydraulic labs

ship model basins

flumes

towing tanks

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UltraLab® ULS AdvancedHighly accurate remote sensing of steep and very fast moving waves with a relative velocity up to 15 m/s

hydraulic labs

ship model basins

flumes

towing tanks

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Mini echo sounder to measure underwater distances and levels for:

Underwater bottom contour

Underwater object distances

Level sensing through container

walls

Hydraulic models

Sediment transport

UltraLab® UWS

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UltraLab®: PerformanceBased on sophisticated

technology the sensors with the

controller deliver a superior

performance, as there are:

• Advanced sensitive sound reception

• Narrow sound beam with practically .no side lobes resulting in enhanced spatial resolution

• Measurement on steep wave flanks/breaking waves are

possible

• Extreme resolution surface scanning

• High repetition rate

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UltraLab®: Advantages

• Superior resolution up to 0,18 mm

• Repetition rates up to 75 Hz/100 Hz

• Various sensors measuring from 250 mm up to 6000 mm

• Detection of smallest and fastest changes

Because of its remote sensing

technology in combination with

its high accuracy and wide

detection range almost all kinds

of water dynamics (also steep

waves/breaking waves) can be

recorded

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UltraLab®: Applications

Applications

• Level monitoring

• Analysis of wave fields

• Measurements in flood- and surface water models

• Detection of surface waves

• Measurement of dynamic processes

• Recording of topographic contours in models

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Measuring Setup

Example of an expected wave or level fluctuation of around 600 mm: The right task for sensor USS20130 with a measuring range of 200 to 1300 mm

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UltraLab® ULS: Calibration Curve

The calibration curve:• is a straight line• does not path through the

origin• ...

minminmax

minmax hUU

hhUh measmeas

... this means that:• the conversion of distance

to voltage is linear• A two point calibration is

easy to do

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UltraLab® ULS: Measurement Example 1

High resolution measurement of a water level- University of Applied Sciences Suderburg, Germany -

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UltraLab® ULS: Measurement Example 2

Superposition of two different waves- VWS Berlin Model Basin -

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UltraLab® ULS: Measurement Example 3

Planar motion (v=2m/s) towards the incoming wave- Hamburg Ship Model Basin -

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UltraLab® ULS: Measurement Example 4

Local reading of a single wave packet- Potsdam Model Basin -

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UltraLab® ULS Advanced: Measurement Example 5

Measurement at a relative velocity about 10 – 12 m/s- Maritime Research Institute Netherlands (MARIN) -

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Specifications UltraLab® ULS

Sample rate: up to 75 Hz

Steep waves can be measured with a horizontal speed of 2 m/s against the incoming wave (4 m/s vertical speed)

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Specifications UltraLab® ULS HF5-A

The system is equipped with 4 synchronised channels. Due to the synchronisation of the channels the sensors can be placed very close to each other. The measuring of wave fields in high resolution concerning time and place are possible with the HF5-A.

Sensor USS 13/HF

Blind area: 200 mm

Working range: 1200 mm

Frequency: 200 kHz

Techn. Resolution: 0.36 mm

Output update: 50 Hz

Interfaces: RS232, LAN

Digital output: ASCII

Proteccion class: IP65

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Specifications UltraLab® ULS Advanced

Steep and very fast moving waves can be measured with a relative velocity up to 15 m/s

Free of calibrationSensor USS 12/HF

Blind area: 200 mm

Working range: 1200 mm

Frequency: 200 kHz

Techn. Resolution: 0.36 mm

Output update: 100 Hz

Interfaces: RS232, LAN

Digital output: ASCII

Proteccion class: IP65

GENERAL ACOUSTICS©

Some References

• Maritime Research Institute Netherlands MARIN / www.marin.nl

• Vienna Model Basin Ltd. / Schiffbautechnische Versuchsanstalt in Wien GmbH / Austria: www.sva.at

• Hamburg Ship Model Basin / Hamburgische Schiffbau-Versuchsanstalt GmbH / Germany: www.hsva.de

• Potsdam Model Basin / Schiffbau-Versuchsanstalt Potsdam GmbH / Germany: www.sva-potsdam.de

• Development Centre for Ship Technology and Transport Systems / Entwicklungszentrum für Schiffstechnik und Transportsysteme e.V. / Duisburg, Germany: www.dst-org.de

• Bassin d'essais des carènes / French Navy / France: www.bassin.fr

• Laboratoire de constructions hydraulique /Switzerland: http://www.epfl.ch/

• Federal Waterways Engineering and Research Institute / Bundesanstalt für Wasserbau Hamburg / Germany: www.baw.de

• University of Trento Trento / Italy: www.ing.unitn.it/dica/eng/

• University of Bari / Italy: www.uniba.it

• RWTH Aachen University /Germany: www-zhv.rwth-aachen.de/

• Technical University of Munich / Germany: www.tum.de