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:
Aug. 01, 1989
Filed:
Sep. 15, 1987
Patrick R Pesque, Perigny, FR;
U.S. Philips Corporation, New York, NY (US);
Abstract
An apparatus for examining a moving object by means of ultrasound echography, enabling the measurement of the axial speed of said movement or the projection of the speed on the axis z of a beam of ultrasound excitations transmitted by an ultrasound transducer (10) with a repetition period T. The apparatus also comprises a transmission stage (20) and a stage (30) for receiving and processing the echographic signals returned to the transducer (10). The stage (30) for receiving and processing the echographic signals comprises a circuit (330) for estimating said axial speed V.sub.Iz (t) which comprises a circuit (340) for extracting the time shift .tau..sub.i (t) between two consecutive echoes e.sub.i (t) and e.sub.i+1 (t), constructed for solving the equation in .tau..sub.i (t): ##EQU1## where e.sub.i (t) is the derivative of the order 'n' with respect to the time of the echo e.sub.i (t), and a circuit (350) for multiplication by C/2T so as to obtain V.sub.iz (t) on the basis of .tau..sub.i (t), where C is the propagation speed of the ultrasound wave.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile