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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 remote detection 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 Common Ultra- sound Sensors or Radar Sensor
GENERAL ACOUSTICS © 12 V DC Power Supply Module Telemetry Moduls: - Radio/GSM/GPRS/ - LAN, Analogue, etc. 1 GB (2 GB) Data Logger Standard Equipment Optional Equipment External Sensors - Wind, Pressure, - Radar, Weather, etc. - AC Power Supply - Wind Generator - Solar Panel - Buffer-Battery Ultrasound-Sensor Controller Module RS 232/485 Output PPS Timing Modul (integrated in Controller) 4 Digit Display Modul Modular Construction of the LOG_aLevel Sound velocity gauging with additional Sensor Stainless steel housing LOG_aLevel Software
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 7,5 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 Example 30 sec. Measurement, then 30 min standby Real-Time Data
GENERAL ACOUSTICS © Summary of the Technical Specifications Ultrasonic high performance sensor technology: Measuring distances 6 m, optional up to 10 meters (higher distances on request) Accuracy: 1 cm; Technical Resolution: 1 mm (360 µ m internal) Sampling rate up to 5 Hz (mean values selectable) Sensor weight: 250 grams Operating temperature: of -20 ° C to +70 ° C Measuring modes: continuous, periodic and sleep mode Remote data transmission and storage: DFÜ modules: Ethernet, RS232/485, GPRS, Radio, directional radio, etc. Bi-directional communication allows remote maintenance Internal data logger: 1GB (or 2 GB) - PCMCIA card for 6 months continuous data acquisition
GENERAL ACOUSTICS © General Advantages Precise, economical, robust and compact Always reliable also under extreme conditions: flood, ice, storms, debris, fog, etc. Accurate level measurements even with wavy surface Simple and inexpensive installation (LOG_aLevel is also available as a mobile version) Calibration and maintenance free Redundancy or alternative to conventional level measurement techniques Completely autonomous operation possible Worldwide in operation Test winner Rijkswaterstaat 2005 against 15 other technologies Easy to use Windows-Software for data logging and control
GENERAL ACOUSTICS © LOG_aLevel ® around the World LOG_aLevel is used on all continents in more than 27 countries under all possible environmental conditions
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, University of Tallinn, Estonia Port of Adelaide (Flinders Ports), Australia Proudman Oceanographic Laboratory, United Kingdom Saudi Aramco, Saudi Arabia
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