METHOD AND MEASURING DEVICE FOR IDENTIFYING THE WELD SEAM OF LONGITUDINALLY SEAM-WELDED TUBES

摘要

the invention relates to a method for the detection of the weld seam of individuals from a ferritic or austenitic material manufactured lu00e4ngsnahtgeschweiu00dften tubeswhen the single pipe in a uniform magnetic field and is rotated about its longitudinal axis and between the base metal and weld seam existing and / or permeabilitu00e4tsunterschiede as differentiation using a near the tube, the probe festgestel lt.erfindungsgemu00e4u00df is suitable frequency eddy current by means of the probe in the tube are coupled and the empfangssignal in either a low signal (parent metal) or a high signal (welding) the ad converted.dollars a with a gauge for detecting the seam of each from a ferritic or austeritischen material manufactured lu00e4ngsnahtgeschweiu00dften tubes in accordance with the procedure with a wirbelstromgeru00e4t and an associated probe and with a wirbelstromgeru00e4t. esehenen meu00dfschaltung for analysis of wirbelstromsignalen, suchthat of the parent metal and the weld unterscheidbares signal occurs, the probe abmessungsmu00e4u00dfig designed so that this is also the smallest to be nennabmessung without impairment of the measurement aufsetzbar.