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:
Jul. 22, 2003
Filed:
Jul. 24, 2000
Jean-Pierre Deflandre, Ermont, FR;
Other;
Abstract
A method for automatic analysis of signals acquired by one or more elastic or acoustic wave pickups to automatically locate with high precision, at least one significant instant such as the time of first arrival on each pickup (t ) and/or the end time (t ) of these signals. The method comprises determining the pseudoperiod corresponding to the inverse of the dominant frequency of the frequency spectrum of each acquired signal, coding each acquired signal so as to form a binary coded signal in reference to a first threshold value depending on the acquired signal, forming for each of them an integral signal by stacking of the binary coded signal on a sliding window in order to determine a second threshold value, and positioning the significant instant sought (t , t ) on each acquired signal in reference to an instant where the corresponding integral signal reaches this second threshold value.