Vibration sensing in gas turbine engine

Details Vibration sensing in gas turbine engine Vibration sensing in gas turbine engine

2001-01-26

2002-09-03

Camby, Richard M. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C235S103000

Reexamination Certificate

active

06445995

ABSTRACT:

FIELD OF THE INVENTION
The invention relates to vibration sensing.
BACKGROUND OF THE INVENTION
Gas turbine engines are commonly equipped with one, or more, accelerometers to detect vibration. Because the accelerometers sometimes malfunction, back-up accelerometers are often provided. The accelerometers add weight to the engine. They also increase costs of manufacturing, design, and maintenance. Further, some accelerometers are fragile, and easily damaged.
SUMMARY OF THE INVENTION
The invention mitigates some, or all, of the disadvantages just identified. One form of the invention detects vibration by analyzing an existing pulse train which is produced by an existing sensor, and presently used for speed measurement. Under the invention, the existing pulse train is used to indicate both speed and vibration.


REFERENCES:
patent: 3866108 (1975-02-01), Yannone et al.
patent: 3866109 (1975-02-01), Reed et al.
patent: 3898439 (1975-08-01), Reed et al.
patent: 5252860 (1993-10-01), McCarty et al.
patent: 6191513 (2001-02-01), Chen et al.

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