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US 6,128,079 AGranted
Fiber optic probe and system for measurement of moisture in steam turbines
AssigneeElectric Power Research Institute, Inc.
InventorsThomas H. McCloskey, Stephen Hesler, Alexander Liberson, Russell H. Maurer
Life of this patent
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Abstract
There is described a fiber optic probe and associated system for measuring light extinction due to forward scattering by steam droplets. A system is also described for analyzing the light transmissibility to produce a measure of steam wetness.
Claims5
A fiber optic probe system comprising:
- a fiber optic probe for measuring steam quality,
- a source of light having a broad wavelength range,
- a probe tip having a scattering volume defined by a collimating lens and a reflector,
- a first fiber optic cable for delivering light from said source of light to said collimating lens whereby collimated light travels through said volume and is reflected back to said collimating lens,
- a second fiber optic cable for receiving the reflected light focused by said collimating lens,
- a diffraction grating for receiving reflected light from said second fiber optic cable and breaking it into a plurality of spectral lines,
- a photodiode array for receiving said spectral lines and providing an electrical output signal representative of the intensity of the light at each of said spectral lines,
- a computer, and
- an interface module for applying control signals from said computer to said source of light and for applying the output signals from said photodiode array to said computer.
6 more elements
Dependencies are inferred from the claim text.