Monitoring device for rotating body

Details Monitoring device for rotating body Monitoring device for rotating body

2008-04-18

2009-02-24

Stafira, Michael P (Department: 2886)

Optics: measuring and testing

Material strain analysis

C356S614000

Reexamination Certificate

active

07495750

ABSTRACT:
The present invention relates to a monitoring device for a rotating body, which can accurately measure signals from a fiber Bragg grating sensor provided on the rotating body by compensating a transmission loss variation and a distortion of the sensor signals. A rotation-side optical fiber has at least one deformation sensor at a portion thereof and a reference sensor at one end thereof. The sensors are made by forming a Bragg grating in the rotation-side optical fiber. A fixed-side optical fiber is mounted to the fixed body so as to be opposed to the one end of the rotation-side optical fiber. A signal processing unit detects a deformation of the rotating body by subtracting a signal corresponding to the light reflected from the reference sensor from a signal corresponding to the light reflected from the deformation sensor.

REFERENCES:
patent: 2005/0253051 (2005-11-01), Hwang et al.
patent: 2007/0289741 (2007-12-01), Rambow
patent: 11-201735 (1999-07-01), None
patent: 2001-183114 (2001-07-01), None
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patent: 10-2001-0002906 (2001-01-01), None
patent: 10-2003-0093739 (2003-12-01), None
patent: 10-2005-0109191 (2005-11-01), None

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