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. 01, 2015
Filed:
Jun. 11, 2010
Jean-gabriel Minonzio, Paris, FR;
Maryline Talmant, Vermon, FR;
Pascal Laugier, Paris, FR;
Centre Nationale de la Recherche Scientifique—CNRS, Paris, FR;
Université Pierre et Marie Curie (Paris 6), Paris, FR;
Abstract
A probe including Nultrasonic emitters and Nultrasonic receivers is applied on the medium to be characterized. Each emitter is activated successively and each time signals are detected on the set of receivers during a time window. Each of the N×Nsignals detected is converted by temporal Fourier transformation to a sum of vibrational components each having its temporal frequency. For each frequency, a matrix N×Nof complex amplitudes of vibrational components having this frequency is extracted. These matrices are decomposed into singular values, the smallest are eliminated, and the singular vectors associated with the singular values retained, a base of the space of the reception signals is formed, for each frequency. The contribution of each plane wave, characterized by its velocity, in this base is calculated. This contribution is represented in the form of a grey level in a frequency-propagation velocity reference system.