METHOD FOR DETECTING WELD DEFECTS
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United States of America Patent
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Jan 12, 2017
app pub date -
Feb 12, 2015
filing date -
Feb 12, 2014
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Abstract
A method of detecting a defect in a weld joining a first surface of a polyethylene-based material and a second surface of a polyethylene-based material, said method comprising the steps of: positioning a first electrode and a second electrode in proximity to the weld, so that at least one electric field line passes through said weld when a potential difference is applied between said first and second electrodes, measuring an electrical capacitance at a measurement frequency between said first electrode and said second electrode, the measurement frequency being higher than 65 MHz and lower than 1 GHz in order to compare the measured electrical capacitance to a reference value.
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