A New Technique for Measuring a time-varying Optical Fiber Strain

1996 ◽  
Author(s):  
Osamu Ogawa ◽  
Mitsuru Kamikatano ◽  
Takashi Matsuzawa
Keyword(s):  
Optical Fiber ◽  
New Technique ◽  
Time Varying ◽  
A New Technique

Free Vibration Energy and Period of a String With Time-Varying Length

2000 ◽  
Author(s):  
Seung-Yop Lee
Keyword(s):  
Free Vibration ◽  
Traveling Waves ◽  
Moving Boundary ◽  
String Tension ◽  
New Technique ◽  
Vibration Energy ◽  
Time Varying ◽  
Constant Rate ◽  
Varying Length ◽  
A New Technique

Abstract We introduce a new technique to analyze free vibration energy and natural frequencies of a string with time-varying length by dealing with traveling waves. One of boundaries is vertically fixed but it moves axially at a constant rate. When the string length is varied, the free vibration energy and period also change with time. String tension and non-zero instantaneous vertical velocity at the moving boundary results in the energy variation. When the string undergoes retraction, the vibration energy increases with time. The new technique using traveling waves gives the exact amount of energy transferred into the vibrating system at the moving boundary. The free vibration energy are compared with previous results using the perturbation method and Kotera’s approach.

Measurement of Local Creep Deformation in Cross-Weld Specimen by Optical Fiber Marking and Remote Monitoring

2001 ◽  
Vol 124 (1) ◽  
pp. 54-58 ◽  
Author(s):  
Shan-Tung Tu ◽  
Jian-Ming Gong ◽  
Xiang Ling ◽  
Xiao-Yuan He
Keyword(s):  
High Temperature ◽  
Optical Fiber ◽  
Creep Deformation ◽  
Remote Monitoring ◽  
Small Region ◽  
New Technique ◽  
Deformation Localization ◽  
High Temperature Components ◽  
A New Technique

Creep deformation localization is a common occurrence generally found in high temperature components, typically at weldments and geometrical discontinuities. The deformation in a small region cannot be measured by a conventional displacement gage. A new technique for measuring long-term local creep deformation was developed. It uses quartz optical fiber marking, remote monitoring, and image processing. Long-term measurements of the creep deformations of base metal, weld metal, and heat-affected zone in cross-weld specimens were performed at high temperature, which verify the new technique. Strain distributions and evolutions in the weldments are obtained.

Aerosol transport for optical fiber core doping: a new technique for glass formation

1991 ◽  
Vol 22 (5) ◽  
pp. 657-666 ◽  
Author(s):  
T.F. Morse ◽  
A. Kilian ◽  
L. Reinhart ◽  
J.W. Cipolla
Keyword(s):  
Optical Fiber ◽  
Glass Formation ◽  
New Technique ◽  
Aerosol Transport ◽  
Fiber Core ◽  
A New Technique

Drawing optical fiber bundles from a double crucible: a new technique

1978 ◽  
Vol 17 (2) ◽  
pp. 170 ◽  
Author(s):  
H. A. Aulich ◽  
J. G. Grabmaier ◽  
K. H. Eisenrith
Keyword(s):  
Optical Fiber ◽  
New Technique ◽  
Fiber Bundles ◽  
Double Crucible ◽  
A New Technique

A new technique for the mapping of oxygen tension on the brain surface

2005 ◽  
Vol 25 (1_suppl) ◽  
pp. S543-S543
Author(s):  
Satoshi Kimura ◽  
Keigo Matsumoto ◽  
Yoshio Imahori ◽  
Katsuyoshi Mineura ◽  
Toshiyuki Itoh
Keyword(s):  
Oxygen Tension ◽  
New Technique ◽  
Brain Surface ◽  
A New Technique ◽  
The Brain
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