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

Laurence, Stuart und 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.

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

Kurzfassung

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.

Dokumentart:Konferenzbeitrag (Vortrag)
Titel:High precision image-based tracking of a rigid body moving within a fluid
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Laurence, Stuartstuart.laurence@dlr.de
Martinez Schramm, JanNICHT SPEZIFIZIERT
Datum:2010
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Band:Vol. 55
Name der Reihe:Conference Proceedings
Status:veröffentlicht
Stichwörter:Optical tracking; force measurement
Veranstaltungstitel:63rd Annual Meeting of the APS Division of Fluid Dynamics
Veranstaltungsort:Long Beach, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:21.-23. Nov. 2010
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W RP - Raumtransport
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W RP - Raumtransport
DLR - Teilgebiet (Projekt, Vorhaben):W - Raumfahrzeugsysteme - Anlagen u. Messtechnik (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Raumfahrzeuge
Hinterlegt von: Stuart Laurence
Hinterlegt am:21 Dez 2010 15:10
Letzte Änderung:21 Dez 2010 15:10

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