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.

Real-time monitoring of the longitudinal strain of Continuous Welded Rail for safety improvement

2019 ◽  
Vol 234 (10) ◽  
pp. 1238-1252 ◽  
Author(s):  
A Consilvio ◽  
M Iorani ◽  
V Iovane ◽  
M Sciutto ◽  
G Sciutto
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Human Error ◽  
Calibration Procedure ◽  
Monitoring Systems ◽  
Strain Monitoring ◽  
Safety Improvement ◽  
Continuous Welded Rail ◽  
Rail Inspection ◽  
Human Error Probability

Continuous welded rail maintenance plays a significant role in ensuring high levels of rail traffic and safety. Temperature variations, excessive alignment defects, decreased fastening system resistance and train braking (always in the same stretches and in the same direction) may result in rail buckling or rail breaks. The current traditional monitoring systems and procedures for continuous welded rail consist of programmed discontinuous diagnostic surveys that require personnel intervention on site. Moreover, these traditional systems often imply destructive and invasive operations on the track that may lead to interruption of railway operations. This paper proposes a Rail Strain Monitoring System (RSMS) that performs a real-time rail strain monitoring and allows rail inspection without personnel on site. Using strain gauges and temperature sensors, placed on the rail in specific measurement points, the proposed Rail Strain Monitoring System performs a multi-parameter check by measuring, at the same time, the temperature, the rail strain and the neutral temperature of the rail. The paper describes the mode of operation of the Rail Strain Monitoring System, the calibration procedure and the results from the field, and highlights the advantages of this system in comparison to other traditional monitoring systems. The safety improvement that can be achieved with the application of the Rail Strain Monitoring System is analysed. In particular, the reliability of the system is evaluated and compared to the human error probability in the traditional manual inspections. Finally, the reduction of derailment risk and related economic damages is estimated.

scholarly journals Signal analysis of a polarimetric fiber optic sensor for dynamic strain monitoring

2014 ◽  
Vol 6 (2) ◽  
Author(s):  
Marcin S Bieda ◽  
Andrzej W. Domanski ◽  
Dawid Kuchta ◽  
Piotr Lesiak ◽  
Tomasz R. Wolinski
Keyword(s):  
Signal Analysis ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Dynamic Strain ◽  
Strain Monitoring ◽  
Optic Sensor

scholarly journals Real time dynamic strain monitoring of optical links using the backreflection of live PSK data

2016 ◽  
Vol 24 (19) ◽  
pp. 22303 ◽  
Author(s):  
H. F. Martins ◽  
K. Shi ◽  
B. C. Thomsen ◽  
S. Martin-Lopez ◽  
M. Gonzalez-Herraez ◽  
...  
Keyword(s):  
Real Time ◽  
Dynamic Strain ◽  
Time Dynamic ◽  
Optical Links ◽  
Strain Monitoring
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