Design and Calibration of a Fiber-Optic Monitoring System for the Determination of Segment Joint Movements Inside a Hydro Power Dam

2015 ◽  
Vol 33 (12) ◽  
pp. 2652-2657 ◽  
Author(s):  
Helmut Woschitz ◽  
Ferdinand Klug ◽  
Werner Lienhart
Keyword(s):  
Monitoring System ◽  
Fiber Optic ◽  
Hydro Power

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

Optimization of sol-gel based fibre-optic cholinesterase biosensor for the determination of organophosphorus pesticides

2000 ◽  
Vol 42 (7-8) ◽  
pp. 283-290 ◽  
Author(s):  
H.-C. Tsai ◽  
R.-A. Doong
Keyword(s):  
Fiber Optic ◽  
Ph Value ◽  
Rapid Determination ◽  
Organophosphorus Pesticides ◽  
Sol Gel ◽  
Neutral Red ◽  
Fluorescent Indicators ◽  
Low Leakage ◽  
Fiber Optic System

A sol-gel based fiber-optic biosensor with acetylcholinesterase as the biorecognition element has been developed for the rapid determination of organophosphorus pesticides. Nine fluorescent indicators, acridine, acridine orange, neutral red, DAPI, rhodamine B, fluorescein, umbelliferone, FITC on celite and FITC-dextran, have been examined to optimize the fiber-optic system. Results showed that acridine and FITCs were sensitive to the change of pH value caused by the enzyme-substrate catalysis reaction. However, the sensitivity of acridine was 260 times lower than that of FITCs. Higher toxicity of acridine to acetylcholinesterase than FITC was also observed. Moreover, the high-molecular-weight FITC-dextran showed low leakage rate when immobilizing using sol-gel technology, showing that the FITC-dextran was a suitable pH sensitive fluorescent indicator for the OPPs biosensor. The response of the fiber-optic biosensor to the substrate, acetylcholine, was highly reproducible (RSD=3.5%). A good linearity of acetylcholine in the range from 0.5 to 20 mM was also obtained (R2=0.98). Furthermore, a 30% inhibition can be achieved in 30min when 152 ppb paraoxon was added into the system. The results show the possibility for real-time determination of organophosphorus pesticides by using the biosensor developed in this study.

Real-time in-situ determination of free Cu(II) at picomolar levels in sea water using a fluorescence lifetime-based fiber optic biosensor

2002 ◽  
Author(s):  
Richard B. Thompson ◽  
Hui-Hui Zeng ◽  
Carol A. Fierke ◽  
Gary Fones ◽  
James W. Moffett
Keyword(s):  
Real Time ◽  
Fluorescence Lifetime ◽  
Fiber Optic ◽  
Sea Water

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

Corrosion Analysis of a Fiber-Optic Transceiver Housing

2001 ◽  
Author(s):  
J. H. Lau ◽  
C. L. Jiaa ◽  
S. J. Erasmus
Keyword(s):  
Relative Humidity ◽  
Corrosion Rate ◽  
Cross Sections ◽  
Weight Change ◽  
Fiber Optic ◽  
Die Casting ◽  
Extinction Ratio ◽  
Optical Power ◽  
Zinc Alloy

Abstract The corrosion responses of a fiber-optic transceiver’s housing with zinc alloy die casting material are investigated in this study. Emphasis is placed on the determination of the weight change and corrosion rate of the housing when it is subjected to a 85% relative humidity and 85°C temperature (85%RH/85°C) test condition. Also, the average light optical power, receiver sensitivity, extinction ratio, and mask margin of transceiver modules subjected to 85%RH/85°C and 3.47V at 500, 1000, 1500, and 1600 hours are provided. Furthermore, metallography is performed on the surfaces and cross sections of the housing. Finally, measurements are made of the thickness of the oxide layer on the surfaces of the fiber-optic transceiver housing.

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