Yomo Kazuma, Ikami Tsubasa, Fujita Koji, Nagai Hiroki
Institute of Fluid Science, Tohoku University, Sendai 980-8577, Japan.
Department of Aerospace Engineering, Tohoku University, Sendai 980-8577, Japan.
Sensors (Basel). 2022 Jun 11;22(12):4430. doi: 10.3390/s22124430.
Pressure-sensitive paint (PSP) is an optical sensor that can measure global pressure distribution by using the oxygen quenching of dye molecules. In particular, anodized aluminum pressure-sensitive paint (AA-PSP) exhibits a fast time response. AA-PSP has been used in unsteady measurements at supersonic and transonic speeds, such as on the surface of a transonic free-flying sphere or the wall of a shock tube when the shock wave passes. To capture such ultrafast phenomena, the frame rate of the camera must be sufficiently fast, and the exposure time must be sufficiently short. Therefore, it is desirable that the AA-PSP exhibits bright luminescence, high-pressure sensitivity, and fast response time. This study focused on pyrene-based AA-PSPs and investigated their characteristics, such as luminescence intensity and pressure sensitivity, at different anodization times, dipping solvents, and dipping concentrations. Furthermore, a time-response test using a shock tube was conducted on the brightest AA-PSP. Consequently, the time for a 90% rise in pressure was 2.2 μs.
压敏漆（PSP）是一种光学传感器，它可以通过利用染料分子的氧猝灭来测量全局压力分布。特别是，阳极氧化铝压敏漆（AA-PSP）具有快速的时间响应。AA-PSP已用于超音速和跨音速速度下的非定常测量，例如在跨音速自由飞行球体表面或冲击波通过时激波管的壁面上。为了捕捉这种超快现象，相机的帧率必须足够快，曝光时间必须足够短。因此，期望AA-PSP具有明亮的发光、高压敏感性和快速响应时间。本研究聚焦于芘基AA-PSP，并研究了它们在不同阳极氧化时间、浸渍溶剂和浸渍浓度下的发光强度和压力敏感性等特性。此外，对最亮的AA-PSP进行了使用激波管的时间响应测试。结果，压力上升90%的时间为2.2微秒。
