Tohoku University · 화학공학
M. Kasai 교수의 연구실은 주로 압력 및 온도 측정을 위한 광학적 센서 기반 기술, 특히 압력민감도 페인트(PSP)와 온도민감도 페인트(TSP)의 개발 및 응용에 중점을 두고 있습니다. 특히 저압 환경에서 높은 응답 속도와 정확도를 확보하기 위한 신소재 기반 페인트(예: 폴리(TMSP), 티타늄다이옥사이드 복합체)의 설계와, 동적 압력 측정에 최적화된 센서 성능 평가 방법을 연구하고 있습니다. 또한 PSP와 TSP를 동시에 이용한 정밀 측정 기술의 최적화 및 잡음 요소 분석을 통해 고해상도 영상 기반 유체역학 측정 기술을 발전시키고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
The characteristics of fast-response pressure-sensitive paints (PSPs) in low-pressure conditions were evaluated. Three representative porous binders were investigated: polymer-ceramic PSP (PC-PSP), anodized-aluminum PSP (AA-PSP), and thin-layer chromatography PSP (TLC-PSP). For each PSP, two types of luminophores, Pt(II) meso-tetra (pentafluorophenyl) porphine (PtTFPP) and tris(bathophenanthroline) ruthenium dichloride (Ru(dpp)3), were used as sensor molecules. Pressure sensitivities, temperatur
Abstract In this study, fast-response polymer-ceramic pressure-sensitive paints (PC-PSP) were developed and evaluated for pressure measurement under low-pressure conditions. The PC-PSP using poly[1-trimethylsilyl)-1-propyne] (poly(TMSP)), which has high oxygen permeability under low-pressure conditions, was developed in this study. The static and dynamic characteristics of the developed poly(TMSP)-based PC-PSP were evaluated in comparison with those of conventional poly(isobutyl methacrylate) (p
Abstract In this study, a new method that optimizes a measurement condition in a lifetime-based simultaneous measurement of a pressure-sensitive paint (PSP) and a temperature-sensitive paint (TSP) is proposed for the improvement of the accuracy of the pressure measurement. An optimal gate is selected based on a pressure measurement error when calculating the pressure and the temperature simultaneously from measurement values of a PSP and a TSP. A shot noise of a PSP, a temperature error, and a f
Abstract Two evaluation indexes were proposed to select the optimal PSP for unsteady pressure measurement from various PSPs with different pressure sensitivity and frequency response. An effective sensitivity coefficient calculated by pressure sensitivity and gain attenuation due to the response delay was proposed. Furthermore, an effective amount of intensity change was recommended, which takes into account the emission intensity and the effective sensitivity coefficient, because the magnitude
A temperature-sensitive paint (TSP) using a chameleon luminophore [ Tb 0 . 99 Eu 0 . 01 ( hfa ) 3 ( dpbp ) ] n is proposed. The chameleon luminophore was dispersed in isobutyl methacrylate polymer in a toluene solvent to fix it on a sample coupon. Temperature and pressure sensitivities of the chameleon luminophore-based TSP were measured using a spectrofluorophotometer. The emission for each wavelength was confirmed to be dependent on the temperature and pressure. The temperature and pressure se
To decrease both the intensity of the exciting light and the amount of sodium fluorescein, we attached a compact image intensifier incorporating a microchannel plate with a fundus photoscope and tried to record video-fluorescein angiography with low steady light. We preliminarily examined the relationships of exciting and emitted light intensity with various concentrations of sodium fluorescein. The strongest fluorescence was obtained with a concentration of 0.01 mg/ml solution of sodium fluores
