Segmented strip design for a magnetostriction sensor (MsS) using amorphous material for long range inspection of defects and bends in pipes at high temperatures
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United States of America Patent
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Sep 11, 2018
Grant Date -
Mar 10, 2016
app pub date -
Apr 10, 2014
filing date -
Apr 29, 2013
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Abstract
The invention relates to a continuous monitoring system which will monitor the pipes without the need of shutting down of the plants. The major issues in designing such a system using magnetostriction as per prior art is the loss of magnetization of the permanent magnets used to provide the magnetic bias and also the disbonding of interfaced adhesives with which the magnetostrictive ribbons are bonded at high temperatures. The invention identifies a novel sensor which can be taken up to high temperatures without any loss of signal strength, this is achieved by generating guided waves using a special amorphous magnetostrictive ribbons. L(0, 2) mode waves are generated using these ribbons to monitor pipes working at high temperatures as per the invention.
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