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:
Nov. 26, 2013
Filed:
Jun. 19, 2009
Hans-joachim Steiner, Bremen, DE;
Ulrich Steimel, Oyten, DE;
Hans-Joachim Steiner, Bremen, DE;
Ulrich Steimel, Oyten, DE;
Atlas Elektronik GmbH, Bremen, DE;
Abstract
A method and an apparatus for passive determination of target parameters by directionally selective reception of sound waves emitted or transmitted from a target, by an arrangement () of underwater sound sensors of a sonar receiving installation from estimated bearing angles determined from estimated positions of the target, and bearing angles measured at the measurement point by the arrangement (). A bearing angle difference between measured and estimated bearing angles is iteratively minimized and, when the minimum is reached, the target parameters are used for an optimized solution for outputting target position, course, range and/or velocity and they are updated during each processing cycle in a series of successive processing cycles. To estimate the reliability of this optimized solution, during each processing cycle a multiplicity of different target tracks Z(i,j) are calculated from possible solutions for the target parameters to be determined, specifically an assumed target course C, an assumed target range Rand/or an assumed target velocity V. Associated bearing angles Bare assumed for each of the possible solutions, and the assumed bearing angles Bare used to calculate a quality measure.