The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 25, 1984
Filed:
Oct. 22, 1981
Jean Marini, Marly le Roi, FR;
Bernard Audenard, Orgeval, FR;
Framatome, Courbevoie, FR;
Abstract
The present invention allows the position of a defect to be located when it emits acoustic waves into a closed structure. The waves travel around closed routes in a section of the structure. To this end, it comprises at least three acoustic sensors (22-24), uniformly distributed on the surface of the section of the structure monitored, connected to logic (26, 27) for encoding the order of arrival of the signals detected. Control means (16, 20, 35) for controlling display means and means (19) for controlling the writing means of the latter, which is preferably a conventional dual-trace oscilloscope are described. The image of the section monitored is traced by two beams rotating in opposite directions, only one of which is illuminated for a brief instant at the moment of detection of the acoustic emission, as it passes the image point identifying the defect.