Vibration measurement

Details Vibration measurement Vibration measurement

1976-11-05

1978-03-28

Myracle, Jerry W.

Measuring and testing

Vibration

Sensing apparatus

73656, G01H 100

Patent

active

040808238

ABSTRACT:
Apparatus and methods for measuring deflection of rotating fan blades of a gas turbine engine is disclosed. The measurement of bending and torsional deformation in response to integral and to nonintegral vibration as well as to structural loading is developed. Optical measuring techniques including the projection of collimated light beams into the fan section of the engine are employed. A linear readout of angular deflection is displayed on a distant screen for amplification of the actual deflection. The plurality of beams provide a deflection profile covering the full surface of the blade.

REFERENCES:
patent: 1082014 (1913-12-01), Digby et al.
patent: 2959956 (1960-11-01), Sweeney et al.

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