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A temperature demodulation method by using compensation of fiber attenuation and dispersion for distributed temperature sensors (DTS) is proposed and demonstrated in order to improve the DTS measuring speed and accuracy. Firstly, the attenuation coefficients difference between anti-Stokes and Stokes backscattering is modified, which avoids the calibration processing on the entire sensing optical fiber...
A new optical fiber sensor made of tapered and CO2-laser-notched long-period fiber gratings (LPFGs) is proposed for the simultaneous measurement of strain and temperature. Experiments are run to verify the feasibility of using the proposed sensor for the simultaneous measurement of strain and temperature. Experimental results indicate that after the two LPFGs are connected with each other, the sensitivity...
The monitoring of heat generation inside closed high-voltage switch cabinet is a technical problem which affects safe production at present. This paper analyses the present early warning technique for switch cabinet at home and abroad and proposes the high-voltage switch cabinet elements based on gas composition analysis, and deeply analyses the principle of temperature measurement using laser light...
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