Nondestructive testing of structural material by m

专利名称：Nondestructive testing of structural

material by means of ultrasonics

发明人：Hans-Jurgen Bathmann,Bernhard

Hoh,Siegmar Schulz

申请号：US06/415830申请日：19820908公开号：US04492118A公开日：19850108

摘要：Plate stock of uneven and variable thickness is tested for defects by means ofultrasonics whereby the zone adjacent the front surface and up to a depth of theminimum plate thickness is detected conventionally, but under utilization of a novelmethod the zone of variable thickness adjacent the rear wall is tested by detecting anyecho in a gating period (15) that is returned from that zone or from the rear wall, andsuch an echo is used to set up a supplemental gating period during which either none orthe rear wall echo will occur and in the latter case the setting up of the supplementalgating period is interpreted as having resulted from the presence of a defect (forexample, echo 12) so that the occurrence of the rear wall echo 9 within the supplementalgating period is registered as an indication of a defect.

申请人：MANNESMANN AG,KRAUTKRAEMER GMBH

代理人：Ralf H. Siegemund

更多信息请下载全文后查看