- Multifunctional Fiber-Optic Nanosensors for Environmental Monitoring

2016 ◽  
pp. 532-567
Keyword(s):  
Environmental Monitoring ◽  
Fiber Optic

Elastomeric Risers in the Offshore Wind Industry

2020 ◽  
Vol 54 (6) ◽  
pp. 77-83
Author(s):  
David G. Aubrey ◽  
Jennifer Wehof ◽  
Stephen O'Malley ◽  
Rajai Aghabi
Keyword(s):  
Environmental Monitoring ◽  
Fiber Optic ◽  
Power Transmission ◽  
Autonomous Underwater Vehicle ◽  
Data Transfer ◽  
Benthic Communities ◽  
Underwater Vehicle ◽  
Offshore Wind ◽  
Monitoring Systems ◽  
Fishing Activity

AbstractFloating LiDAR systems (FLS) and other moored environmental monitoring systems are used extensively for wind and environmental assessments in offshore wind projects. In addition, wave energy converters (WECs) are being evaluated for more extensive use in coastal and deeper waters, most of which also require anchoring to the seabed. Since these systems must be moored, heavy anchors and typically heavy chain are used to secure the mooring and measurement/WEC buoy to the seabed. Disadvantages of present mooring technology include 1) damage to the seabed and benthic communities in vicinity of the mooring, as chain sweeps over the sea bottom; 2) an unnecessarily large watch circle at the water's surface; 3) slightly increased likelihood of marine mammal entanglement; 4) mooring damage from nearby fishing activity; and 5) likelihood of mooring failure due to self-entanglement within the mooring itself. This study presents an alternative mooring using mechanically compliant, elastomeric hoses to connect the buoyed system to the bottom anchor. Modeling the two mooring types with a typical buoy used in wind resource assessments shows a significant decrease in anchor drag area and surface watch circle with the use of the elastomeric hose versus the traditional chain and polyethylene line mooring. The hose also is equipped with copper conductors and/or fiber-optic conductors, providing power and data transmission between the bottom and the surface. For WEC solutions, the elastomeric hose provides similar benefits as for FLS and environmental monitoring systems, with the added advantage of being able to transmit power to the seafloor for distribution. For one WEC application, we have developed an elastomeric solution containing not only larger copper conductors to enable power transmission but also fiber-optic conductors to permit data transfer from a garage mounted on the bottom (servicing an autonomous underwater vehicle [AUV] or unmanned underwater vehicle [UUV], for instance) to the surface buoy for onward transmission to shore.

TFBG-assisted fiber optic sensors for environmental monitoring

2021 ◽  
Author(s):  
Egor I. Dolzhenko ◽  
Kirill Tomyshev ◽  
Oleg V. Butov
Keyword(s):  
Environmental Monitoring ◽  
Fiber Optic ◽  
Fiber Optic Sensors

Fiber-optic sensor design for chemical process and environmental monitoring

2009 ◽  
Vol 47 (10) ◽  
pp. 1069-1076 ◽  
Author(s):  
R.S. Mahendran ◽  
L. Wang ◽  
V.R. Machavaram ◽  
S.D. Pandita ◽  
R. Chen ◽  
...  
Keyword(s):  
Environmental Monitoring ◽  
Chemical Process ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Sensor Design ◽  
Optic Sensor

Fiber optic sensors for environmental monitoring

Chemosphere ◽  
1996 ◽  
Vol 33 (6) ◽  
pp. 1151-1174 ◽  
Author(s):  
Kim R. Rogers ◽  
Edward J. Poziomek
Keyword(s):  
Environmental Monitoring ◽  
Fiber Optic ◽  
Fiber Optic Sensors
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