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:
Dec. 03, 2013
Filed:
Jun. 17, 2010
Benoit Pochon, Paris, FR;
Benoit Pochon, Paris, FR;
Parrot, Paris, FR;
Abstract
The method comprises: a) the emission of an ultrasound burst repeated at a predetermined recurrence frequency; and b) after each emission and for the duration of a time frame (n−1, n, n+1, . . . ) separating two consecutive emissions, the reception of a plurality of successive signal spikes appearing in the course of the same frame. These spikes include spurious spikes (E', E′, E′, . . . ) originating from the emitter of another drone, and a useful spike (E, E, E, . . . ) corresponding to the distance to be estimated. To discriminate these spikes, the following steps are executed: c) for two consecutive frames, comparison of the instants of arrival of the p spikes of the current frame with the instants of arrival of the q spikes of the previous frame and determination, for each of the p.q pairs of spikes, of a corresponding relative time gap; d) application to the p.q gaps determined in step c) of a selection criterion making it possible to retain just a single spike of the current frame; and e) estimation of the distance as a function of the instant of arrival of the spike thus retained.