Overview
L'AWAC 1 MHz est l'instrument de référence pour les mesures de houle à partir du fond. Des milliers d'AWAC ont déjà été déployés à travers le monde pour mesurer la houle directionnelle ainsi que les profils de courant. Avec une portée de 35 m et avec un échantillonnage jusqu'à 4 Hz de la surface, l'AWAC est l'outil de prédilection pour les mesures de courant et de houle en zone côtière.
- Currents
- Waves
Highlights
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Mesure des profils de courant jusqu'à une portée de 30 m
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Mesure de la houle directionnelle jusqu'à une immersion de 35 m
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Tracking acoustique de la surface (AST) avec un faisceau vertical
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Peut être utilisé sur des structures fixes ou des bouées de subsurface
Usage
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Mesure temps réel du courant et de la houle
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Aménagement de structures côtières
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Étude de sites pour champ éolien en mer
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Étude érosion côtière
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Campagne de mesures où le spectre directionnel total de houle est souhaité
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Étude d'agitation en milieu portuaire
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Étude des courants de marée
Setup
Designed for straightforward and reliable current and wave measurements in up to 35m of water, the AWAC 1MHz is configured using Nortek deployment software before installation. The AWAC is often considered the industry standard in wave measurements.
Deployment
AWACs are often bottom-mounted and/or implemented as part of real-time wave monitoring systems. Leading industry partners offer bespoke frames and buoys for the AWAC. Multiple communication protocols make simultaneous power and data transmission easy.
Data
Optional onboard wave processing allows real-time streaming of wave parameters to users onshore. Nortek’s SUV processing method (exclusive to AWACs and Signatures) enables quality wave measurements from a moving subsurface buoy. Nortek postprocessing software and/or display software is available for review or visualization of data, after deployment or in real time.
| Maximum profiling range | 30 m |
| Cell size | 0.25-4.0 m |
| Number of cells | Typical 20-40, max. 128 |
| Velocity range | ±10 m/s horizontal, ±5 m/s along beam |
| Accuracy | ±1% of measured value ±0.5 cm/s |
| Velocity precision | Consult instrument software |
| Maximum output rate | 1 Hz |
| Internal sampling rate | 7 Hz |
| Sampling | Same as velocity |
| Resolution | 0.45 dB |
| Dynamic range | 90 dB |
| Transducer acoustic frequency | 1 MHz |
| Number of beams | 3 beams 120° apart, one vertical beam (90° apart, one at 5° for platform mount) |
| Beam width | 1.7° |
| Beam width vertical beam | 1.7° |
| Maximum depth | 35 m |
| Data types | Pressure, one velocity along each beam, AST |
| Sampling rate velocity (output) | 2 Hz |
| Sampling rate AST (output) | 4 Hz |
| No. of samples per burst | 512, 1024 or 2048 |
| Range | -15 to 15 m |
| Accuracy/resolution (Hs) | < 1% of measured value / 1 cm |
| Accuracy/resolution (Dir) | 2° / 0.1° |
| Period range | 0.5-50 s |
| Cut-off period (Hs) | 5 m depth: 0.5 sec, 20 m depth: 0.9 sec, 60 m depth: 1.5 sec |
| Cut-off period (dir) | 5 m depth: 1.5 sec, 20 m depth: 3.1 sec, 60 m depth: 5.5 sec |
| Temperature: | Thermistor embedded in housing |
| Temp. range | -4 to +40 °C |
| Temp. accuracy/resolution | 0.1 °C/0.01°C |
| Temp. time response | < 5 min |
| Compass: | Magnetoresistive |
| Accuracy/resolution | 2°/0.1° for tilt <15° |
| Tilt: | Liquid level |
| Accuracy/resolution | 0.2°/0.1° |
| Maximum tilt | 30°,AST requires <10° instrument tilt |
| Up or Down | Automatic detect |
| Pressure: | Piezoresistive |
| Range | 50 m |
| Accuracy | 0.5% of full scale (optional 0.1% of full scale) |
| Resolution | 0.005% of full scale |
| No. of channels | 2 |
| Supply voltage to analog output devices | Three options selectable through firmware commands: Battery voltage/500 mA, +5V/250 mA, +12V/100 mA |
| Voltage input | 0-5 V |
| Resolution | 16-bit A/D |
| Capacity | 9 MB standard, 4/16 GB (Prolog) |
| Profile record | Ncells*9 + 120 bytes |
| Wave record | Nsamples*24 + 1k bytes |
| Mode | Stop when full (default and Prolog) or wrap mode |
| Accuracy | ±1 min/year |
| Backup in absence of power | 1 year |
| I/O | RS-232 or RS-422. Software supports most commercially available USB– RS-232 converters |
| Communication baud rate | 300- 115200 Bd |
| Recorder download baud rate | 600/1200 kBd for both RS-232 and RS-422 |
| User control | Handled via "AWAC AST" software, or ActiveX® controls. "Seastate" for online systems |
| Output formats | NMEA, Binary. Prolog provides same types also for processed wave and current data. |
| Bulkhead | MCBH-2-FS, MCBH-8-FS, optional Souriau M-series metal connector for online use |
| Cable | PMCIL-8-MP on 10 m polyurethane cable, metal connector optional |
| Functions | Deployment planning, instrument configuration, data retrieval and conversion. (for Windows®) |
| DC input | 9- 18V DC |
| Maximum peak current | 3 A |
| Avg. power consumption | 0,65 W |
| Sleep current | < 100 μA |
| Transmit power | 1-30W, 3 adjustable levels |
| Operating temperature | -4 to +40 °C |
| Storage temperature | -20 to +60 °C |
| Shock and vibration | IEC 721-3-2 |
| EMC approval | IEC 61000 |
| Depth rating | 300m |
| Standard model | POM and polyurethane plastics with titanium fasteners |
| Maximum diameter | 210 mm |
| Maximum length | 175 mm |
| Weight in air | 6.1 kg |
| Weight in water | 2.9 kg |
| Polyurethane jacket, Shore D hardness, 13mm in diameter, max 2km. Inquire for longer cables |
AWAC 1 MHz, four beams
Symmetrical transducer orientation
Platform head
9 MB of memory on motherboard (M8)
4 GB SD card data logger
16 GB SD card data logger
ProLog with wave processing
Pressure sensor, 0-10 m
Pressure sensor, 0-20 m
Pressure sensor, 0-20m, accuracy 0,1% of FS
Pressure sensor, 0-30 m
Pressure sensor, 0-50 m
Pressure sensor, 0-50m, accuracy 0,1% of FS
Pressure sensor, 0-100 m
Pressure sensor, 0-100m, accuracy 0,1% of FS
Pressure sensor, 0-200m
10m RS232 polyurethane cable with 8-pin inline connector and USB converter
20m RS232 polyurethane cable with 8-pin inline connector and USB converter
30m RS232 polyurethane cable with 8-pin inline connector and USB converter
40m RS232 polyurethane cable with 8-pin inline connector and USB converter
50m RS232 polyurethane cable with 8-pin inline connector and USB converter
10m RS422 polyurethane cable with 8-pin inline connector and USB converter
20m RS422 polyurethane cable with 8-pin inline connector and USB converter
30m RS422 polyurethane cable with 8-pin inline connector and USB converter
40m RS422 polyurethane cable with 8-pin inline connector and USB converter
50m RS422 polyurethane cable with 8-pin inline connector and USB converter
Compass and tilt sensor
Without compass and tilt sensor
Cable for external battery canister for AWAC and Continental (2-pin flat) (Old design)
Cable RS232 polyurethane with 8-pin inline connector and USB converter
Cable RS422 polyurethane with 8-pin inline connector and USB converter
Battery, 15 V - 1800 Wh, lithium
An optional high-capacity lithium battery for AWACs
Battery canister, aluminium for 36*D pack w/cable to AWAC 2-pin inline (500m rating)
Battery canister, aluminium for 2*36*D pack w/cable to AWAC 2-pin inline (500m rating)
Battery, 13.5 V - 540 Wh, alkaline
The standard battery for AWACs (13.5 V) that use an external battery canister.
Battery pack, 5-pack, 13.5 V - 540 Wh, alkaline
The standard battery for AWACs (13.5 V) that use an external battery canister.
Battery pack, 10-pack, 13.5 V - 540 Wh, alkaline
The standard battery for AWACs (13.5 V) that use an external battery canister.
Set of Anti-fouling patches for AWAC 1MHz
This set is suitable for AWAC 1MHz
