GENERAL ACOUSTICS © Autonomous Remote Sensing of Water Level and Waves The LOG_aLevel ® - System Based on Revolutionary Ultrasonic Technology.

GENERAL ACOUSTICS©

Autonomous Remote Sensing of Water Level and Waves

The LOG_aLevel® - System

Based on Revolutionary Ultrasonic Technology

GENERAL ACOUSTICS©

LOG_aLevel® - The Ultrasound-Sensor

The Innovation: Fast, precise and remotedetection of waves and water

levels

Sensor characteristics

•Narrow sound beam of 3° ensures small footprint on water surface

•Free of disturbing minor sound beams

•Extraordinary high transmitting power and receiving sensitivity

•Technical resolution: 1 mm

•Accuracy in field operation: 1 cm

Easy installation at any place

•jetties, wharfs, sluices, embankment•beacons, dolphins, poles, bridges

•buildings, platforms, etc.

GENERAL ACOUSTICS©

LOG_aLevel® compared to common systems

GENERAL ACOUSTICS©

Sound velocity gauging

12 V DCPower supply

module

CommunicationModule

Radio/GPRS etc.

PCMCIAData Logger

1 GB

Standard equipmentOptional accessories

External Sensors

(e.g. Wind)

AC Power supplyWind

GeneratorSolar Panel

Buffer-Battery

UltrasonicsensorRS

232/485 output

Controller

Module

PPS Timing Module(integrated in Controller)

Display Module

GENERAL ACOUSTICS©

LOG_aLevel® in big housing

Modular Construction

• Controller

• Data Logger

• Power Supply 12 V

• Power Supply 230 V

• GSM/GPRS

• 80 Ah Buffer Battery

GENERAL ACOUSTICS©

LOG_aLevel® in small housing

Modular Construction

• Controller

• Power Supply 12 V

• Power Supply 230 V

• Radio Module

• 9,5 Ah Buffer Battery

GENERAL ACOUSTICS©

Sound Velocity measurement due to the possible change of temperature, air pressure and humidity

By using the directly measured ultrasound velocity in air and the measured travel time it is possible to accurately compute the water level due to the continuously calibration.

LOG_aLevel® Reference-Sensor

GENERAL ACOUSTICS©

LOG_aLevel® - Applications

• Water level monitoring• Wave detection and analysis• Flood and high water prediction• Mobile Working Level• Event Alerting System• Water reservoir management• Environmental monitoring• Complete hydrological and

metrological monitoring station

GENERAL ACOUSTICS©

Example

The Storm-Tide-Network in the

Port of Hamburg

(Location: Strandkai)

GENERAL ACOUSTICS©

Example

The Storm-Tide-Network in the Port of Hamburg

(Location: Nienstedten)

Ultrasound-Sensor Controller

Antenna

GENERAL ACOUSTICS©

Storm Tide Network at Port of Hamburg

Nienstedten

Strandkai

Billwerder Sperrwerk

Hamburger Schleuse

Network consists of:

• 4 LOG_aLevel Stations

• Integration of wind sensor

• Autonomous power supply (wind and solar)

• Remote data transfer via GPRS

GENERAL ACOUSTICS©

The LOG_aLevel® - Software for data logging and control

Real-Time visualizing of Water Level and the Wave Parameter (H1/3)

GENERAL ACOUSTICS©

Level Data Example30 sec. Measurement, then 30 min standby

Real-Time Data

GENERAL ACOUSTICS©

•Quick assembly and initiation

•Free of calibration

•Maintenance-free

•Robust, compact and always reliable also under extreme conditions: flood, ice, storms, debris, fog, etc.

•Sampling rate up to 5 Hz

•Each single wave is measured

•Accuracy 1 cm and resolution 1 mm

•Small beam angle of sensor, no side lobes

•Construction near buildings possible

•Low power consumption of system

•Proved and tested (RIZA 2005, Port of Hamburg 2003, NIOT 2004)

•Multi-event triggering and alerting

•Remote access (bi-directional data transfer and control)

•Easy to integrate in existing networks

•Integration of additional sensors (e.g. metrological)

•Easy to use Windows-Software for data logging and control

•Best cost/performance ratio

Summary of LOG_aLevel® - Advantages

GENERAL ACOUSTICS©

LOG_aLevel® around the World

LOG_aLevel is used on all continents in more than 20 countries under all possible environmental conditions

2

2

23

9

216

2

GENERAL ACOUSTICS©

LOG_aLevel® Selected References• Rijkswaterstaat: Ministry of Transport + Watermanagement, (RIZA), The

Netherlands

• Port of Hamburg (Hamburg Port Authority), Germany

• US-Army Corps of Engineers San Francisco District (USACE), USA

• Project: North Sea Monitoring System: Government Schleswig-Holstein, Germany

• Bundesanstalt für Gewässerkunde (BfG), Koblenz (Federal Institute of Hydrology),

Germany

• National Institute of Ocean technology (NIOT), India

• Port of Le Havre (Port Autonome du Havre), France; Port of Seoul, Korea

• MRTS, Varanday-Oil and Gas Terminal, Russia

• Geofísica y Posicionamiento Satelital GPSCA, Maracaibo Lake, Venezuela

• Ecologia, Vouneuil-sur-Vienne, River Vienne, France

• Wasser- und Schifffahrtsamt Brandenburg (Waterways and Shipping Board),

Germany

• Bayer. Landesamt für Wasserwirtschaft (Bavarian Ministry of Environment),

Germany

• Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB-Berlin), Germany

• Agency for Water Management, Coast and Nature Protection of Lower Saxony),

NLWKN –

Norderney, Germany and NLWKN – Brake, Germany

• University of Moscow, Russia

• Port of Adelaide (Flinders Ports), Australia

• Proudman Oceanographic Laboratory, United Kingdom

GENERAL ACOUSTICS©

Thank you for your attention!