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. 06, 1983
Filed:
Mar. 17, 1981
Pierre Tournois, Paris, FR;
Thomson-CSF, Paris, FR;
Abstract
A system for detection by an echo containing transmission and reception sources for detection by acoustic waves in particular. A circular base with N columns T.sub.1, T.sub.2, -T.sub.i,-T.sub.N of electroacoustic transducers. To each column such as T.sub.i corresponds a transmission at the frequency f.sub.i. A switch makes it possible to change from transmission to reception. The signals received are applied to a channel forming device. For each channel such as V.sub.k the signals are filtered at frequencies f.sub.1, f.sub.2, -f.sub.N, which are applied to time offset circuits taking into account the base geometry and the channel direction. The signals obtained such as d.sub.i.k are applied to a display device which supplies the range, direction and speed of the targets detected. This is particularly applicable to underwater surveillance by sonar or radar.