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:
Apr. 14, 2020
Filed:
Jun. 07, 2017
Nec Corporation, Minato-ku, Tokyo, JP;
Minoru Kobayashi, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
In order to acquire echo sound information about a long-distance target, an active sonar comprises a fan beam transmitter, a fan beam receiver, a propagation path calculator, a path time calculator, and a horizontal distance calculator. The active sonar transmits a plurality of transmitted fan beams horizontally wide and vertically narrow, and the elevation angles of them are mutually deferent, and receives received fan beams vertically wide and horizontally narrow. The propagation path calculator calculates a propagation path of each of the transmitted fan beams based on the profile of medium and the elevation angle of the transmission. The path time calculator calculates a path time which is the time period from the transmission to the reception. The horizontal distance calculator calculates a horizontal distance from the active sonar to a generation source point of each echo sounds based on the propagation path and the path time.