The fiber optic probe and the fiber optic probe in order to measure the quality

摘要

PROBLEM TO BE SOLVED: To make measurable water in a steam turbine or the quality of the steam by equipping a light source with a wide wavelength range, a probe tip with a scattering volume, a cable for sending from the light source to a lens for making parallel, and a row of photodiodes for supplying an electrical signal for indicating the light intensity. ;SOLUTION: A water-measuring device is provided with the fiber optic probe 11 that is inserted into a steam turbine for measuring the quality of steam at various kinds of positions. The probe outputs light with a wide band of wavelength of a sensing volume, and light with various kinds of wavelengths is scattered differently according to the ratio of the wavelength of the diameter and incidence light of a waterdrop by the waterfrop with an elliptical surface in the flow of bi-phase steam. Forward scattered light is matching layer to the direction of incidence light. The intensity pattern of the scattered light is measured by the ratio of the intensity of light being transmitted through a medium containing a waterdrop for the intensity of light being transmitted in a suspension state while no waterdrop exists. In the measurement of the flow of the bi-phase steam, a spectral transmittance is measured, and the distribution of a waterdrop size is inferred from a measurement light transmission data using the Mie theory.;COPYRIGHT: (C)2000,JPO