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:
May. 05, 1992
Filed:
Feb. 11, 1991
Odile Bonnefous, Nogent sur Marne, FR;
Frederic Mangotte, Creteil, FR;
U.S. Philips Corporation, New York, NY (US);
Abstract
A first channel processes a received echo signal and comprises a first intercorrelation circuit for two successive echographic signals S.sub.n (t) and S.sub.n+1 (t). A second, parallel channel comprises two symmetrical parallel bandpass filters responsive to the echographic signals for generating from each received signal two signals at a frequency f.sub.1 <f.sub.o and f.sub.2 >f.sub.o, respectively, and supplying s.sub.n1 (t) and s.sub.n2 (t). A multiplier forms sS.sub.n1 (t).times.s.sub.n2 (t). A symmetrical low-pass filter selects the components s.sub.n (t) having the frequency f.sub.2 -f.sub.1 of the multiplier product. A second intercorrelation circuit provides a correlation signal from the selected signal s.sub.n (t) and s.sub.n+1 (t). A multiplexing/interpolation circuit supplies the value of the speed by searching for the maximum of the first correlation function in the vicinity of the maximum of the second correlation function.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile