Temperature-corrected pressure-sensitive paint measurements using a single camera and a dual-lifetime approach
Temperature-corrected pressure-sensitive paint measurements using a single camera and a dual-lifetime approach
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DOI：
10.1088/0957-0233/13/10/307
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发表时间：
2002-10-01
影响因子：
2.4
通讯作者：
MacCraith, BD
中科院分区：
文献类型：
--
作者：
Hradil, J;Davis, C;MacCraith, BD
测量表面压力的发光涂层的温度依赖性是一个公认的问题。表面压力测量的温度校正通常通过结合第二发光涂层或通过共同固定第二发光体以提供表面温度分布来进行。这通常会使测量过程变得复杂，因为需要第二台相机或复杂的滤波器来区分两种发光过程。在这里，开发了一种单相机、温度校正的PSP（压敏漆）系统。描述了一种新的透氧溶胶-凝胶基涂料，其含有温度敏感性和压力敏感性发光体。两种发光体的荧光衰减时间相隔几个数量级。这使得压力和温度相关的发光衰减测量在时域中分离。此外，选择两种发光体，使得它们的吸收和发射光谱发生在相似的光谱区域。这避免了对不同激发源或检测滤波器的需要。因此，可以使用具有门控图像增强器的单个相机来测量相同周期内的每个发光体的寿命。这种新的PSP具有使用单个激励源和检测系统提供温度校正的表面压力分布的潜力。
The temperature dependence of luminescent coatings which measure surface pressure is a well established problem. Temperature correction of the surface pressure measurement is often carried out by incorporating a second luminescent coating or by co-immobilizing a second luminophore to provide a surface temperature profile. This usually complicates the measurement process by requiring a second camera or sophisticated filtering to distinguish between the two luminescent processes.Here, a single-camera, temperature-corrected PSP (pressure-sensitive paint) system was developed. A new oxygen-permeable sol-gel-based paint, containing both a temperature- and a pressure-sensitive luminophore is described. The fluorescence decay times of the two luminophores are separated by several orders of magnitude. This allows pressure- and temperature-dependent luminescent decay measurements to be separated in the time domain.In addition, the two luminophores were selected such that their absorption and emission spectra occur in similar spectral regions. This avoids the need for different excitation sources or detection filters. Hence a single camera with a gated image intensifier can be used to measure the lifetime of each luminophore within the same cycle. Image alignment issues experienced in dual-camera systems are also avoided.This new PSP has the potential to provide a temperature-corrected surface pressure profile using a single excitation source and detection system.