A Technique to Visualize Tranparent Oil Using Pulsed Fluorescence Method

Abstract

Anew technique to visualize transparent oil remotelyhasbeenpresented. Inherently a semiconductor-based oil sensor or a CCD-camera-based sensing device has been employed in a power plant. However, they can hardly recognize oil-leaked areas and issue a leak alarm immediately when monitoring transparent oil such as steam turbine oil and gas turbine oil. To overcome the restrictions, a pulsed fluorescence method, where a pulsed flash lamp is used for incident ultra violet ray in a standard fluorescence method, has been developed. For verification, an oil monitoring device based on the present technique has been developed. Some experiments to demonstrate performances of the present device have been carried out in an actual power plant. As a result, it has been shown that the present device works successfully.