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:
Feb. 27, 2007
Filed:
Jul. 05, 2002
Frédéric Cohen Tenoudji, Neuilly sur Seine, FR;
Vincent Dewailly, Saint Michel sur Orge, FR;
Jean-pierre Frangi, Villejuif, FR;
Jean-françois Mourey, Cachan, FR;
Frédéric Cohen Tenoudji, Neuilly sur Seine, FR;
Vincent Dewailly, Saint Michel sur Orge, FR;
Jean-Pierre Frangi, Villejuif, FR;
Jean-François Mourey, Cachan, FR;
Universite Paris 7 — Denis Diderot, Paris, FR;
Abstract
The invention relates to an ultrasonic tomograph for spatial and temporal characterisation of fluids in motion such as air and water. This tomograph comprises a plurality of pairs of emitting-receiving ultrasonic probes, whereas each pair may be inscribed, diametrally opposite, on a circle centred round a flow axis of the fluid. The probes are therefore laid out on either side of the flow and will neither modify nor disturb the flow. Each probe may be displaced in a plane perpendicular to the flow axis. Indeed each probe is allocated a stepping motor. Each probe is a piezoelectric ceramic transducer which does not drift with time and which does not require any re-calibration, which provides the tomograph according to the invention stability over time. Moreover this tomograph is robust since these ultrasonic probes may be used under extreme conditions. The frequency of ultrasounds ranges between 30 kHz and 300 kHz.