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!