elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

High precision image-based tracking of a rigid body moving within a fluid

Laurence, Stuart and Martinez Schramm, Jan (2010) High precision image-based tracking of a rigid body moving within a fluid. 63rd Annual Meeting of the APS Division of Fluid Dynamics, 21.-23. Nov. 2010, Long Beach, USA.

[img] MS PowerPoint
1MB

Official URL: http://meetings.aps.org/Meeting/DFD10/Event/134408

Abstract

Precise measurement of the displacement, velocity and acceleration of a moving rigid body is of interest in many applications. The use of imaging techniques to obtain such information is an attractive option, particularly for movement within a fluid, as such measurements are inherently non-intrusive. Here we describe a class of imaging techniques based on edge detection and least-squares fitting for determining the displacement of a body, from which velocities and accelerations are readily derived. The use of edge-detection allows for potentially higher precision than correlation-based techniques. The accuracy of the techniques is estimated using both artificially generated images and calibrated measurements, and displacement errors of the order of a few thousandths of a pixel are shown to be obtainable for camera noise levels of a few percent. The resulting uncertainties in velocity and acceleration measurements are also analyzed. Several applications are then described, with particular emphasis on force measurements in short duration supersonic and hypersonic wind tunnels.

Item URL in elib:https://elib.dlr.de/67134/
Document Type:Conference or Workshop Item (Speech)
Title:High precision image-based tracking of a rigid body moving within a fluid
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Laurence, Stuartstuart.laurence (at) dlr.deUNSPECIFIED
Martinez Schramm, JanUNSPECIFIEDUNSPECIFIED
Date:2010
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Vol. 55
Series Name:Conference Proceedings
Status:Published
Keywords:Optical tracking; force measurement
Event Title:63rd Annual Meeting of the APS Division of Fluid Dynamics
Event Location:Long Beach, USA
Event Type:international Conference
Event Dates:21.-23. Nov. 2010
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Raumfahrzeugsysteme - Anlagen u. Messtechnik (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Laurence, Stuart
Deposited On:21 Dec 2010 15:10
Last Modified:31 Jul 2019 19:30

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.