Aperçu
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
Points forts
-
Mesure des profils de courant jusqu'à une portée de 30 m
-
Mesure de la houle directionnelle jusqu'à une immersion de 35 m
-
Tracking acoustique de la surface (AST) avec un faisceau vertical
-
Peut être utilisé sur des structures fixes ou des bouées de subsurface
Utilisation
-
Mesure temps réel du courant et de la houle
-
Aménagement de structures côtières
-
Étude de sites pour champ éolien en mer
-
Étude érosion côtière
-
Campagne de mesures où le spectre directionnel total de houle est souhaité
-
Étude d'agitation en milieu portuaire
-
Étude des courants de marée
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