Post on 30-Mar-2015
transcript
NSF Development
• Development funded by NSF
• The Surface Piercing Profiler is Ultimately a Vendor Supplied System
• The SeaCycler is an exemplar for the Global OOI Surface Piercing Profiler
- Used on a sub-surface mooring.
- Profiles (or moves) instruments from a 150m depth, to the surface and back collecting data
- When at the surface, it floats a small satellite antenna to communicate data to shore and receive new commands
- No surface expression, except when communicating
- Conserves power to enable numerous long profiles
- Designed for the open-ocean.
150m
Mechanism Float (underwater winch)
Instrument Float - travels 150m to Surface
23m fixed cable length
Communication Float - travels with the “InstFloat”
Flotation Sphere
Profiling PrincipleA small buoyancy
moved a long distance is balanced by a large
buoyancy moved a short distance in the opposite direction.
Antenna – Iridium, GPS, FreeWave
Communication Float Weight = 40 lbs Net Buoyancy = 12 lbs
Length = 60+ inches
Seabird MP-52 CTD with O2
AquaDopp Current Meter
Benthos Acoustic Modem
Instrument Float
Weight = 510 lbs Net Buoy = 230 lbs
Sensor Payload = 100 lbs
Electronics Case
Mechanism Float
29
54”
70” ID
Mechanism Float Flow DynamicsFin Designed for Stabilization
Fin orients mechanism float into currents
GearMotor (pressure case removed)
Bearings
Lubricator
Pendulum-Ring
Lead Weight
SeaCycler: TorusMotor
Pinion
Section View (both cases
shown)Floating Base Plate
SeaCycler Deployment History:
7 Deployments Since March 2010
- 3x, Bedford Basin (76m depth)
- 2x, 32 km Offshore (155m depth)
- 2x, 250 km Offshore (1120m depth)
SeaCycler350 Jan-09 Update ( Home stretch
…..)
Mechanism Float
Instrument Float
Ready for Deployment
The Instrument Float can be “surfaced” to adjust buoyancy and/or swap instruments at sea without recovering the mooring.
Instrument Float
CommunicationsFloat
Instrument Float
- Satellite communication for near real-time data and remote control operation
- Inductive modem coupling to deeper-water instrumentation- Open-ocean design suitable for deep water (5000m) sites- Profiling
- 365 x 150m profiles are possible for year-long deployments- Profile stops for discreet sampling- Extra cable storage to compensate for mooring knockover- 150m “hide-depth” for security and bio-fouling- Surface wave detection
- Large instrument payload (100 lbs in air)- Simple straight-through cable routing – anchor to surface
SeaCycler Capabilities