Pérez Alberto J, González-Peña Rolando J, Braga Roberto, Perles Ángel, Pérez-Marín Eva, García-Diego Fernando J
Dep. d'Informàtica de Sistemes i Computadors (DISCA), Universitat Politècnica de València, 46022 Valencia, Spain.
Dep. Fisiología. Unidad de Biofísica y Física Médica. Facultad de Medicina y Odontología, Universitat de València, 46010 Valencia, Spain.
Sensors (Basel). 2018 Jan 11;18(1):190. doi: 10.3390/s18010190.
Dynamic laser speckle (DLS) is used as a reliable sensor of activity for all types of materials. Traditional applications are based on high-rate captures (usually greater than 10 frames-per-second, fps). Even for drying processes in conservation treatments, where there is a high level of activity in the first moments after the application and slower activity after some minutes or hours, the process is based on the acquisition of images at a time rate that is the same in moments of high and low activity. In this work, we present an alternative approach to track the drying process of protective layers and other painting conservation processes that take a long time to reduce their levels of activity. We illuminate, using three different wavelength lasers, a temporary protector (cyclododecane) and a varnish, and monitor them using a low fps rate during long-term drying. The results are compared to the traditional method. This work also presents a monitoring method that uses portable equipment. The results present the feasibility of using the portable device and show the improved sensitivity of the dynamic laser speckle when sensing the long-term process for drying cyclododecane and varnish in conservation.
动态激光散斑（DLS）被用作所有类型材料活性的可靠传感器。传统应用基于高速率捕获（通常大于每秒10帧，fps）。即使对于保护处理中的干燥过程，在应用后的最初时刻有高水平的活性，而在几分钟或几小时后活性较慢，该过程也是基于以在高活性和低活性时刻相同的时间速率采集图像。在这项工作中，我们提出了一种替代方法来跟踪保护层的干燥过程以及其他需要很长时间来降低其活性水平的绘画保护过程。我们使用三种不同波长的激光照射一种临时保护剂（环十二烷）和一种清漆，并在长期干燥过程中以低fps速率对它们进行监测。将结果与传统方法进行比较。这项工作还提出了一种使用便携式设备的监测方法。结果表明了使用该便携式设备的可行性，并展示了动态激光散斑在感知保护中环十二烷和清漆的长期干燥过程时提高的灵敏度。
