- AWAC is designed as a coastal monitoring system. Small, rugged, and suitable for many years of operation in harsh environments. The mechanical design is both plastic and titanium to prevent corrosion. AWAC is available in two transmission frequencies (1 MHz/600 kHz), allowing for different depths of deployment. Whether measuring waves and waves or waves generated by the wind, our sonic sensors help to record the height, period and direction of waves very accurately and accurately, as well as measuring ocean currents.
- Sensors are typically mounted to a frame on the floor to protect them from surface complications such as harsh weather, vandalism and ship traffic. It sits securely at the bottom and operates in online or standalone mode. In standalone mode, raw data is stored in an internal data logger and power is provided by an external battery pack. A variety of options are available, with a maximum batch duration of 4 months for hourly wave data and up to 8 months with lithium batteries.
- Online systems have many possible communication configurations. The most common are long marine cables (up to 5 km) or acoustic modems. The online system can be supplied with backup batteries, protection cables, shore-side interface units and online software.
- Serpac Co., Ltd. supplies the sea-sulfur measurement system using AWAC products from NORTEK, which are internationally recognized.
1MHz
400Hz
600MHz
Platform 1MHz The AWAC is well suited for both autonomous data collection and as part of a real-time data telemetry system. Subsurface deployment means the instrument is always protected from harsh weather, vandalism, and ship trafc. The small, yet rugged instrument is suitable for multi-year operation in tough environments. Plastic and titanium parts avoid corrosion. The AWAC is available in three transmit frequencies for operational ranges spanning 2m to 100m.
The AWACs extraordinary wave height measurements are aresult of the extensively validated and optimized AcousticSurface Tracking (AST) algorithms. AST estimates the distanceto the surface by echo-ranging with the vertically orientedtransducer. This method circumvents the depth limitationsimposed by bottom mounted pressure and velocitymeasurements and allows the instrument to capture 1 to 50second period waves. Moreover, AST gives you the ability toderive wave parameters based on times series analyses suchas Hmax, H1/10, and Tmean.
Wave direction is calculated by combining AST with orbitalvelocity measurements that have adaptively been sampled ina large cell located near the surface. If the AWAC is mountedin a non-moving frame or structure, Nortek uses the maximum likelihood method applied to the three velocities and thesurface position to estimate all directional wave parametersand spectra. and spread. Nortek’s patented SUV processingcan be used to calculate all the same directional estimatesfrom an AWAC on a subsurface buoy.
The AWAC pressure data are suitable for measuring the tidalelevation from a fxed bottom mounted structure. Nortekrecently extended the option to upgrade the AWAC pressuresensor to an absolute accuracy of 0.1% of full scale, or 5 cm for a 50 m sensor. This pressure sensor is temperaturecompensated and the tidal changes only span a small portionof the full-scale range. Therefore, accuracy of the change intidal elevation is normally twice that of the absolute accuracy,or around 2.5 cm for a 50 sensor.
The AWAC uses the three slanted beams to measure thecurrent profle over a range determined by the acousticfrequency. Large transducers transmit narrow acoustic beamsand provide accurate data. The AWAC will alternate betweenwave data collection and current profling.
Company: Serfec Co., Ltd. | CEO : 임남희 | Adress : 53, Ogam-ro, Mokpo-si, Jeollanam-do, Republic of Korea Business registration number : 170-81-00119 | TEL : 061-287-4002 | FAX : 061-281-4001
Copyright (c) Serfec Co., Ltd. All Rights Reserved.