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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/34045

Title: Micro-Flows Measurement from a LED Micro-PIV System
Authors: Jyh-Jong Sheen
Contributors: NTOU:Department of Mechanical and Mechatronic Engineering
Keywords: Cardioid annular condenser;LED;Micro-PIV;Micro-flows
Date: 2012-10
Issue Date: 2013-10-03T03:14:19Z
Publisher: 5th International Congress on Image and Signal Processing (CISP 2012) and 5th International Congress on BioMedical Engineering and Informatics (BMEI 2012)
Abstract: In this study, light emitted from LED is adopted as the light source of a micro Particle Image Velocimetry system for micro-flows measurement. The strobe frequency of LED can easily reach 20,000Hz, which is high enough to provide the time resolution required for most micro-flows measurement. The problem of relative low power of LED is resolved by adopting a cardioid annular condenser in the microscope, so LED light is focused on the micro-flows and image quality is significantly improved; in addition, image resolution is improved from half of wavelength to one-fifth of wavelength. Clear, dark background particle images of micro-flows are recorded from the proposed LED micro-PIV system. The LED micro-PIV system developed is then applied to measure flow past circular cylinder and hydrodynamic focusing flow in micro channels. Satisfactory results are obtained for all the flows measured.
URI: http://ntour.ntou.edu.tw/handle/987654321/34045
Appears in Collections:[機械與機電工程學系] 演講及研討會

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