公开(公告)号：US20210009263A1

公开(公告)日：2021-01-14

申请号：US16926416

申请日：2020-07-10

Applicant: Dotterel Technologies Limited

Inventor： Samuel Seamus ROWE ,  Shaun Taggart PENTECOST ,  Matthew ROWE ,  Shaun Michael EDLIN ,  Young-min SHIM ,  Michael KINGAN ,  Ryan MCKAY ,  Sung-Tyaek Go

IPC: B64C27/82 ,  B64C39/02 ,  B64C27/20

Abstract: According to an example embodiment there is provided an unmanned aerial vehicle (UAV), the UAV including: a first rotor, the first rotor having a diameter and a first number of blades; and a second rotor, the second rotor having a diameter and a second number of blades; wherein the first and second rotor are substantially coaxial; and wherein the first number and the second number are not the same number and are both more than one.

公开(公告)号：US20200164962A1

公开(公告)日：2020-05-28

申请号：US16632223

申请日：2018-07-23

Applicant: Dotterel Technologies Limited

Inventor： Samuel Seamus ROWE ,  Matthew ROWE ,  Aidan CLARKE

IPC: B64C11/00 ,  B64C39/02 ,  B32B27/06 ,  B32B27/18 ,  B32B27/12

Abstract: A shroud for an aircraft configured to at least partially surround a noise source including a propeller. The shroud includes an outer layer and two or more sound absorbing materials located inside the shroud. The outer layer is configured to transmit noise from the noise source into the inside of the shroud and/or includes a recess located and sized to partially surround at least a part of a tip of at least one blade

公开(公告)号：US20240007786A1

公开(公告)日：2024-01-04

申请号：US18247433

申请日：2021-09-30

Applicant: Dotterel Technologies Limited

Inventor： Shaun Taggart PENTECOST ,  Samuel Seamus ROWE ,  Shaun EDLIN ,  Matthew ROWE ,  Hin LOH ,  Mark POLETTI

IPC: H04R1/40 ,  H04R3/00

CPC classification number: H04R1/40 ,  H04R3/005 ,  H04R2201/403

Abstract: According to a first aspect of the invention, there is provided a method of beamforming for a linear microphone array comprising: storing a desired end-fire beam response including a beamwidth specification; determining an error data set from the stored end-fire beam response; and determining beamforming weights based on a least squares minimisation of the error data set. There are also provided a system, a microphone array, and an apparatus.

公开(公告)号：US20180305004A1

公开(公告)日：2018-10-25

申请号：US15576799

申请日：2016-05-25

Applicant: DOTTEREL TECHNOLOGIES LIMITED

Inventor： Samuel Seamus ROWE ,  Shuan Taggart Pentecost

IPC: B64C27/20 ,  B64C39/02

CPC classification number: B64C27/20 ,  B64C27/08 ,  B64C39/024 ,  B64C2201/027 ,  B64C2201/108 ,  B64C2220/00

Abstract: A shroud for an aircraft having a noise reducing material on or in an inner surface of the shroud adjacent to one or more tips of the propeller. The noise reducing material is preferably an electrospun nanomaterial, particularly a ridged composite acoustic nanofibre. The interior surface of the shroud may be provided with a plurality of sound deflectors configured to dissipate sound by reflection and refraction, and absorb sound into the shroud body. The sound deflectors may be ribs or arrangements of discrete reflector elements.