High-frequency temperature sensing

1995 ◽  
Author(s):  
Wing Ng
Keyword(s):  
High Frequency ◽  
Temperature Sensing ◽  
Frequency Temperature

Assessment of detection limits of fiber-optic distributed temperature sensing for detection of illicit connections

2013 ◽  
Vol 67 (12) ◽  
pp. 2712-2718 ◽  
Author(s):  
Jaap Nienhuis ◽  
Cornelis de Haan ◽  
Jeroen Langeveld ◽  
Martijn Klootwijk ◽  
François Clemens
Keyword(s):  
High Frequency ◽  
Fiber Optic ◽  
Detection Limits ◽  
Temperature Sensing ◽  
Distributed Temperature Sensing ◽  
Monitoring Equipment ◽  
Sewer Systems ◽  
Set Up ◽  
Frequency Temperature ◽  
Storm Sewer

Distributed temperature sensing (DTS) with fiber-optic cables is a powerful tool to detect illicit connections in storm sewer systems. High-frequency temperature measurements along the in-sewer cable create a detailed representation of temperature anomalies due to illicit discharges. The detection limits of the monitoring equipment itself are well-known, but there is little information available on detection limits for the discovery of illicit connections, as in mixing of sewers, and attenuation also plays an important role. This paper describes the results of full-scale experiments aiming to quantify the detection limits for illicit connections under various sewer conditions. Based on the results, a new monitoring set-up for (partially) filled sewer conduits has been proposed.

Lithium line radiation in turbulent edge plasmas: Effects of low and high frequency temperature fluctuations

2011 ◽  
Vol 415 (1) ◽  
pp. S617-S619 ◽  
Author(s):  
J. Rosato ◽  
H. Capes ◽  
F. Catoire ◽  
M.B. Kadomtsev ◽  
M.G. Levashova ◽  
...  
Keyword(s):  
High Frequency ◽  
Temperature Fluctuations ◽  
Line Radiation ◽  
Edge Plasmas ◽  
Frequency Temperature

Suppressing high-frequency temperature oscillations in microchannels with surface structures

2017 ◽  
Vol 110 (3) ◽  
pp. 033501 ◽  
Author(s):  
Yangying Zhu ◽  
Dion S. Antao ◽  
David W. Bian ◽  
Sameer R. Rao ◽  
Jay D. Sircar ◽  
...  
Keyword(s):  
High Frequency ◽  
Surface Structures ◽  
Temperature Oscillations ◽  
Frequency Temperature
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