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Investigation for Simultaneous Measurement of Pressure and Temperature Using Frequency-Domain Lifetime Imaging Technique

Munekata, Mizue and Yorita, Daisuke and Henne, Ulrich and Klein, Christian and Fujita, Isaku and Moriya, Takuma and Yoshikawa, Hiroyuki (2019) Investigation for Simultaneous Measurement of Pressure and Temperature Using Frequency-Domain Lifetime Imaging Technique. In: 7th Japanese-German Joint Seminar – Molecular Imaging Technology for Interdisciplinary Research – (P-20). 7th Japanese-German Joint Seminar, Molecular Imaging Technology for Interdisciplinary Research, 17.-19. Sept. 2019, Hokkaido, Japan.

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Official URL: https://www.eng.hokudai.ac.jp/labo/amc/en/JG/7JGprogram.pdf

Abstract

There are two methods for measuring pressure using conventional pressure-sensitive paints (PSP). The first one is the intensity method using constant excitation light. The second one is the lifetime method using pulsed light. The pressure distribution on body surface is obtained by measuring the emission intensity and the lifetime depending on the pressure, respectively. If the temperature distribution changes due to heat generated by an excitation light and a flow, or heat from an external element such as a motor, it is necessary for high-accuracy pressure measurement to correct the temperature in the both methods. Therefore the temperature data is additionally acquired by a temperature sensor. In this study, frequency–domain lifetime imaging technique (FLIM-PSP) is investigated using sinusoidaly modulated light. The emission intensity is also modulated with same frequency of the light. But the modulated emission wave has the phase angle, the modulation amplitude and average intensity depend on the pressure and the temperature. That is, since FLIM-PSP technique has plural variables, it is investigated that simultaneous measurement of temperature and pressure is possible. It is shown that the phase angle and the modulation depth, which represents a ratio of the modulation amplitude to the averaging intensity, depend on pressure and temperature in a calibration test, as shown in the figure. It is shown that FLIM-PSP technique has possibility of a simultaneous pressure and temperature measurement based on the different sensitivity to pressure and temperature in the phase angle and the modulation depth.

Item URL in elib:https://elib.dlr.de/132633/
Document Type:Conference or Workshop Item (Poster)
Title:Investigation for Simultaneous Measurement of Pressure and Temperature Using Frequency-Domain Lifetime Imaging Technique
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Munekata, MizueKumamoto University, JapanUNSPECIFIED
Yorita, Daisukedaisuke.yorita (at) dlr.deUNSPECIFIED
Henne, Ulrichulrich.henne (at) dlr.deUNSPECIFIED
Klein, Christianchristian.klein (at) dlr.dehttps://orcid.org/0000-0001-7592-6922
Fujita, IsakuKumamoto University, JapanUNSPECIFIED
Moriya, TakumaKumamoto University, JapanUNSPECIFIED
Yoshikawa, HiroyukiKumamoto University, JapanUNSPECIFIED
Date:September 2019
Journal or Publication Title:7th Japanese-German Joint Seminar – Molecular Imaging Technology for Interdisciplinary Research –
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:FLIM, Pressure-sensitive paint, PSP, lifetime
Event Title:7th Japanese-German Joint Seminar, Molecular Imaging Technology for Interdisciplinary Research
Event Location:Hokkaido, Japan
Event Type:international Conference
Event Dates:17.-19. Sept. 2019
Organizer:Hokkaido University, Sapporo, Japan
Institution:Deutsches Zentrum für Luft- und Raumfahrt e.V.
Department:AS-EXV
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Deposited By: Micknaus, Ilka
Deposited On:13 Dec 2019 17:11
Last Modified:13 Dec 2019 17:11

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