An optical fiber based position sensor with immunity to temperature variation

1992 ◽  
Author(s):  
S. Chen ◽  
B. T. Meggitt ◽  
Andrew W. Palmer ◽  
Kenneth T. V. Grattan
Keyword(s):  
Optical Fiber ◽  
Temperature Variation ◽  
Position Sensor

Long stroke optical fiber linear position sensor for the FLASH program

1996 ◽  
Author(s):  
Robert D. LaClair ◽  
William B. Spillman, Jr. ◽  
W. W. Kuhns ◽  
Mark S. Miller
Keyword(s):  
Optical Fiber ◽  
Position Sensor ◽  
Long Stroke

An intrinsic optical-fiber position sensor with schemes for temperature compensation and resolution enhancement

1997 ◽  
Vol 15 (2) ◽  
pp. 261-266 ◽  
Author(s):  
Shiping Chen ◽  
B.T. Meggitt ◽  
A.W. Palmer ◽  
K.T.V. Grattan ◽  
R.A. Pinnock
Keyword(s):  
Optical Fiber ◽  
Temperature Compensation ◽  
Resolution Enhancement ◽  
Position Sensor ◽  
Fiber Position

Design and development of linear optical fiber array based remote position sensor

Optik ◽  
2017 ◽  
Vol 139 ◽  
pp. 355-365 ◽  
Author(s):  
Ravi Dhawan ◽  
Rushal Shah ◽  
Nitin Kawade ◽  
Biswaranjan Dikshit
Keyword(s):  
Optical Fiber ◽  
Position Sensor ◽  
Design And Development ◽  
Fiber Array ◽  
Optical Fiber Array ◽  
Linear Optical

A fluorescent linear optical fiber position sensor

2009 ◽  
Vol 31 (7) ◽  
pp. 1101-1104 ◽  
Author(s):  
P. Aiestaran ◽  
V. Dominguez ◽  
J. Arrue ◽  
J. Zubia
Keyword(s):  
Optical Fiber ◽  
Position Sensor ◽  
Linear Optical ◽  
Fiber Position

scholarly journals Distributed Measurement of Temperature for PCC Energy Pile Using BOFDA

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Lei Gao ◽  
Baoquan Ji ◽  
Gangqiang Kong ◽  
Xu Huang ◽  
Mingkun Li ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Optical Fiber ◽  
Temperature Variation ◽  
Urban Areas ◽  
New Technology ◽  
Optical Fiber Sensor ◽  
Frequency Domain Analysis ◽  
Energy Pile ◽  
Circulating Water ◽  
Distributed Measurement

PCC energy pile is a new technology for sustainable development of urban areas. Learning and understanding the temperature variation of PCC energy pile are very important to its development and application. In this study, the Brillouin optical frequency domain analysis (BOFDA) technology is firstly used to measure the temperature variation of PCC energy pile from a model test. The aim is to provide an optical fiber sensing method for monitoring the temperature distribution of PCC energy pile. When the temperatures of circulating water are 70°C, 60°C, 50°C, and 40°C, the result shows that the temperatures of PCC energy pile under different conditions are measured well by the optical fiber sensor. It will help to master the temperature distribution and thermomechanical characteristic of PCC energy pile. It can also provide the important scientific and theoretical basis for the design and application of PCC energy pile.

Temperature Variation in the Cutting Tool in End Milling

2011 ◽  
Vol 133 (2) ◽  
Author(s):  
Masahiko Sato ◽  
Naoki Tamura ◽  
Hisataka Tanaka
Keyword(s):  
Optical Fiber ◽  
Temperature Variation ◽  
Optical Fibers ◽  
Cutting Tool ◽  
End Milling ◽  
Time Lag ◽  
Cutting Speed ◽  
Rake Face ◽  
Tool Insert ◽  
Tungsten Carbide Tool

This paper describes the cyclic temperature variation beneath the rake face of a cutting tool in end milling. A newly developed infrared radiation pyrometer equipped with two optical fibers is used to measure the temperature. A small hole is drilled in the tool insert from the underside to near the rake face, and an optical fiber is inserted in the hole. One of the optical fibers runs through the inside of the machine tool spindle and connects to the other optical fiber at the end of the spindle. Infrared rays radiating from the bottom of the hole in the tool insert during machining are accepted and transmitted to the pyrometer by the two optical fibers. For a theoretical analysis of the temperature in end milling, a cutting tool is modeled as a semi-infinite rectangular corner, and a Green’s function approach is used. Variation in tool-chip contact length in end milling is considered in the analysis. Experimentally, titanium alloy Ti–6Al–4V is machined in up and down milling with a tungsten carbide tool insert at a cutting speed of 214 m/min. In up milling, the temperature beneath the rake face increases gradually during the cutting period and reaches a maximum just after the cutting. In contrast, in down milling, the temperature increases immediately after cutting starts; it reaches a maximum and then begins to decrease during cutting. This suggests that the thermal impact to the cutting tool during heating is larger in down milling than in up milling, whereas that during cooling is larger in up milling than in down milling. Temperature variation is measured at different depths from the rake face. With increasing depth from the rake face, the temperature decreases and a time lag occurs in the temperature history. At 0.6 mm from the major cutting edge, the temperature gradient toward the inner direction of the tool insert is about 300°C/0.5 mm. The calculated and experimental results agree well.

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