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. 26, 2022
Filed:
Dec. 21, 2018
Sintef Tto As, Trondheim, NO;
Franck Fleurey, Trondheim, NO;
Jakob Høgenes, Trondheim, NO;
SINTEF TTO AS, Trondheim, NO;
Abstract
An unmanned aerial vehicle comprising a velocity sensing system is provided. The velocity sensing system comprises a transmitter configured to transmit a first acoustic signal having at least a first frequency and a receiver, configured to detect a second acoustic signal comprising the first acoustic signal after it has been reflected from a reflective surface. The velocity sensing system is configured to determine from the second acoustic signal a second frequency, said second frequency comprising the first frequency after having undergone a Doppler shift; and to use the first and second frequencies to determine a velocity at which the unmanned aerial vehicle is travelling relative to the reflective surface.