TY - JOUR
T1 - Structured light illumination for pressure-sensitive paint measurement under ambient light
AU - Matsuda, Yu
AU - Katayama, Satoshi
AU - Ikami, Tsubasa
AU - Egami, Yasuhiro
AU - Nagai, Hiroki
N1 - Funding Information:
The authors wish to thank Dr. Yasuhumi Konishi, Hiroyuki Okuizumi, Kazuma Yomo, and Kentaro Yamamoto during the wind tunnel testing at the Institute of Fluid Science, Tohoku University. We also gratefully appreciate Tayca Corp. for providing titanium dioxide. This work was partially supported by JST, PRESTO Grant No. JPMJPR187A, Japan. Part of the work was carried out under Collaborative Research Project No. J21I011 of the Institute of Fluid Science, Tohoku University.
Publisher Copyright:
© 2022 Author(s).
PY - 2022/5/1
Y1 - 2022/5/1
N2 - We propose a pressure-sensitive paint (PSP) method under ambient light based on structured light illumination. In the PSP method, pressure is obtained by measuring the variation of the emission light intensity from a PSP coating when it is illuminated by a light source. Since the extraction of the emission light from ambient light is difficult in the conventional PSP method, the existence of ambient light induces a noticeable measurement error. While spatially uniform light is used as illumination light in the conventional PSP method, structured light, the spatial intensity of which is actively controlled, is used in the proposed method. By measuring the PSP emission by varying the spatial pattern of the structured light illumination, one can eliminate ambient light, which is not synchronized with the structured light and can measure pressure without the effect of ambient light. In this study, we demonstrate the pressure measurement under ambient light using structured light with a sinusoidal wave generated by a digital mirror device. The measured pressure agrees well with the pressure measured by a pressure transducer connected to a pressure tap. The proposed method is promising under ambient light conditions.
AB - We propose a pressure-sensitive paint (PSP) method under ambient light based on structured light illumination. In the PSP method, pressure is obtained by measuring the variation of the emission light intensity from a PSP coating when it is illuminated by a light source. Since the extraction of the emission light from ambient light is difficult in the conventional PSP method, the existence of ambient light induces a noticeable measurement error. While spatially uniform light is used as illumination light in the conventional PSP method, structured light, the spatial intensity of which is actively controlled, is used in the proposed method. By measuring the PSP emission by varying the spatial pattern of the structured light illumination, one can eliminate ambient light, which is not synchronized with the structured light and can measure pressure without the effect of ambient light. In this study, we demonstrate the pressure measurement under ambient light using structured light with a sinusoidal wave generated by a digital mirror device. The measured pressure agrees well with the pressure measured by a pressure transducer connected to a pressure tap. The proposed method is promising under ambient light conditions.
UR - http://www.scopus.com/inward/record.url?scp=85129992397&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85129992397&partnerID=8YFLogxK
U2 - 10.1063/5.0089000
DO - 10.1063/5.0089000
M3 - Article
C2 - 35649770
AN - SCOPUS:85129992397
SN - 0034-6748
VL - 93
JO - Review of Scientific Instruments
JF - Review of Scientific Instruments
IS - 5
M1 - 055101
ER -