Accession Number : ADD006790

Title :   Single Blade Proximity Probe.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Hildebrand,James R

Report Date : 25 Dec 1979

Pagination or Media Count : 3

Abstract : A single blade proximity probe uses fiber optics to direct a laser output at turbine engine blades and to return the reflected light to an image intensifier probe which provides an output indicative of blade clearance. To enable the system to measure the clearance of a single blade tip on an operating turbine, a second light beam having a different wavelength from the laser output is directed over the laser light path to count the blades and to strobe the laser on the desired blade. (Author)

Descriptors :   *Patents, *Turbine blades, *Probes(Electromagnetic), Clearances, Measurement, Lasers, Fiber optics transmission lines, Image intensifiers(Electronics), Stroboscopes

Subject Categories : Lasers and Masers
      Optical Detection and Detectors
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE