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. 26, 1981
Filed:
Nov. 06, 1979
Francois Peynaud, Paris, FR;
Thomson-CSF, Paris, FR;
Abstract
The invention relates to a device for measuring aquatic currents, placed on a moving boat comprising a Doppler effect sonar. The device comprises two sets of transducers and transmitting and receiving in the directions D.sub.1, D.sub.2, D.sub.3 and D.sub.4 forming an angle .+-..alpha. with the vertical z. A transmission circuit supplies impulses simultaneously at two frequencies f.sub.1 and f.sub.2. The receiving circuit processes the signals of the volume reverberation echos affected by the Doppler effect, corresponding to the frequencies f.sub.1 and f.sub.2, and the sea bed echo affected by the Doppler effect at the frequency F=f.sub.1 -f.sub.2, this frequency being generated by the non-linearity of the medium. Finally are obtained the profile of the horizontal velocities of the currents function of the depth.