In this section
@article{Gajdacsi:2014:10.1007/s10921-014-0241-0,
author = {Gajdacsi, A and Jarvis, AJC and Huthwaite, P and Cegla, FB},
doi = {10.1007/s10921-014-0241-0},
journal = {Journal of Nondestructive Evaluation},
pages = {458--470},
title = {Reconstruction of Temperature Distribution in a Steel Block Using an Ultrasonic Sensor Array},
url = {http://dx.doi.org/10.1007/s10921-014-0241-0},
volume = {33},
year = {2014}
}
TY - JOUR
AB - Permanently installed ultrasonic sensors have thecapability of measuring much smaller changes in the signalthan conventional sensors that are used for ultrasonic inspections.This is because uncertainties associated with couplingfluids and positional offsets are eliminated. Therefore it ispotentially possible to monitor the onset of material degradation.A particular degradation mechanism that we are keento monitor is high temperature hydrogen attack; where theamount of damage is linked to a drop in ultrasonic velocitywhich we hope can be monitored for with an ultrasonic array.The changes introduced in the ultrasonic propagation velocityare expected to be of the order of 1 % and in practice theyare observable only from a very limited field of view (i.e. fromthe outside of a pipe) and therefore the reconstruction is challengingto accomplish. In order to explore the feasibility ofthis, we are investigating the reconstruction of a non-uniformtemperature distribution which allows us to quickly evaluatethe sensitivity of our method to small spatial variations inultrasonic velocity of the material. Two reconstruction algorithmswere implemented and their performance comparedin simulated and real measurements. The results of the testswere encouraging: local temperature differences as low as10 C could be detected, which corresponds to a local propagationvelocity change of 5 m/s (0.15 % relative velocitychange).
AU - Gajdacsi,A
AU - Jarvis,AJC
AU - Huthwaite,P
AU - Cegla,FB
DO - 10.1007/s10921-014-0241-0
EP - 470
PY - 2014///
SN - 1573-4862
SP - 458
TI - Reconstruction of Temperature Distribution in a Steel Block Using an Ultrasonic Sensor Array
T2 - Journal of Nondestructive Evaluation
UR - http://dx.doi.org/10.1007/s10921-014-0241-0
UR - http://hdl.handle.net/10044/1/26329
VL - 33
ER -