Marine Applications For A Continuous Fiber Optic Strain Monitoring System

1986 ◽  
Author(s):  
D.S. McKeehan ◽  
R.W. Griffiths ◽  
J.E. Halkyard
Keyword(s):  
Monitoring System ◽  
Fiber Optic ◽  
Continuous Fiber ◽  
Strain Monitoring ◽  
Marine Applications

Real-Time Strain Monitoring of a Navy Vessel During Open Water Transit

2010 ◽  
Vol 54 (04) ◽  
pp. 225-230
Author(s):  
J. M. Nichols ◽  
M. Seaver ◽  
S. T. Trickey ◽  
E. Aktas ◽  
K. Scandell ◽  
...  
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Fiber Optic ◽  
Primary Source ◽  
Open Water ◽  
Dynamic Strain ◽  
Ship Maneuvers ◽  
Strain Monitoring ◽  
Deck Plate ◽  
Critical Components

In this work we describe the installation of a real-time, fiber-optic strain monitoring system aboard a US Navy vessel undergoing sea trials. The system is lightweight, unintrusive, corrosion resistant, and provides dynamic strain response measurements from direct current (DC) up to 360 Hz. Also described are the data acquisition and subsequent analysis. The goals of the study were to demonstrate a fiber-optic strain monitoring system under real world conditions and to better understand the source of deck cracking above an area housing mission-critical components. The results of the two-day trial indicate that there exist large stresses in the deck plate during normal ship operation. Based on the results, it is clear that ship maneuvers, slewing of the radar located on the deck plate, and insolation-related effects are not the primary source of the observed stress.

Continuously Distributed Fiber Optic Monitoring System for Shipboard Applications

1988 ◽  
Vol 25 (03) ◽  
pp. 209-219
Author(s):  
Richard W. Griffiths ◽  
Herbert I. Chatterton
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Temperature Sensitivity ◽  
Fiber Optic ◽  
Bench Test ◽  
Test Results ◽  
Continuous Fiber ◽  
Fiber Optic Cable ◽  
Time Basis ◽  
Pressure Changes

This paper suggests several areas of applicability wherein continuously monitored fiber optic cables of composite construction will improve the sensing ability of locating and reporting the conditions extant on ships of various types. By using continuous fiber cables strategically located throughout the ship that are compositely clad with different coatings to detect temperature, pressure and strain, an optically attenuated profile can be continuously monitored on a cyclical basis to report the specific conditions on a real-time basis. Preliminary bench test results of prototype jacketed fiber optic cable indicate that strains of 0.0004 to 0.003 in./in. can be detected as well as pressure changes of similar sensitivity. Currently, tests are being run to determine temperature sensitivity, and it is expected that comparable results will be achieved. With the development of the systems and improvement in jacketing materials, further refinements and expansion of capabilities are expected.

Nursing Movement Monitoring System Utilizing Hetero-core Fiber Optic Sensors Embedded in Medical Thin Films

2018 ◽  
Vol 138 (12) ◽  
pp. 525-532
Author(s):  
Masahiko Ito ◽  
Yuya Koyama ◽  
Michiko Nishiyama ◽  
Emi Yanagisawa ◽  
Mariko Hayashi ◽  
...  
Keyword(s):  
Thin Films ◽  
Monitoring System ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Core Fiber ◽  
Movement Monitoring

Fiber optic displacement sensor used in railway turnout contact monitoring system

2013 ◽  
Author(s):  
Hongbin Xu ◽  
Wentao Zhang ◽  
Yanliang Du ◽  
Feng Li ◽  
Fang Li
Keyword(s):  
Monitoring System ◽  
Fiber Optic ◽  
Displacement Sensor ◽  
Railway Turnout

scholarly journals Strain monitoring system for steel and concrete structures

2018 ◽  
Vol 10 ◽  
pp. 25-32 ◽  
Author(s):  
E. Cheilakou ◽  
N. Tsopelas ◽  
A. Anastasopoulos ◽  
D. Kourousis ◽  
D. Rychkov ◽  
...  
Keyword(s):  
Monitoring System ◽  
Concrete Structures ◽  
Strain Monitoring
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