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Event-based imaging velocimetry using pulsed illumination

Willert, Christian (2023) Event-based imaging velocimetry using pulsed illumination. Experiments in Fluids, 64, p. 98. Springer Nature. doi: 10.1007/s00348-023-03641-8. ISSN 0723-4864.

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Official URL: https://doi.org/10.1007/s00348-023-03641-8


The paper addresses the shortcoming of current event-based vision (EBV) sensors in the context of particle imaging. Latency is introduced both on the pixel level as well as during read-out from the array and results in systemic timing errors when processing the recorded event data. Using pulsed illumination, the overall latency can be quantified and indicates an upper bound on the frequency response on the order of 10-20 kHz for the specific EBV sensor. In particle-based flow measurement applications, particles scattering the light from a pulsed light source operating below this upper frequency can be reliably tracked in time. Through the combination of event-based vision and pulsed illumination, flow field measurements are demonstrated at light pulsing rates up to 10 kHz in both water and air flows by providing turbulence statistics and velocity spectra. The described EBV-based velocimetry system consists of only an EBV camera and a (low-cost) laser that can be directly modulated by the camera, making the system compact, portable and cost-effective.

Item URL in elib:https://elib.dlr.de/194977/
Document Type:Article
Title:Event-based imaging velocimetry using pulsed illumination
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Willert, ChristianUNSPECIFIEDhttps://orcid.org/0000-0002-1668-0181UNSPECIFIED
Date:5 May 2023
Journal or Publication Title:Experiments in Fluids
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:p. 98
Publisher:Springer Nature
Keywords:event-based vision, dynamic vision sensor, latency, particle imaging, PIV, Particle tracking velocimetry, PTV, Pulsed illumination, structured light, flow field imaging
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Clean Propulsion
DLR - Research area:Aeronautics
DLR - Program:L CP - Clean Propulsion
DLR - Research theme (Project):L - Virtual Engine
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Willert, Dr.phil. Christian
Deposited On:16 May 2023 14:11
Last Modified:16 May 2023 14:11

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