Vibrating optical fiber accelerometer and gyroscope

Details Vibrating optical fiber accelerometer and gyroscope Vibrating optical fiber accelerometer and gyroscope

1985-10-07

1988-07-05

LaRoche, Eugene R.

Optics: measuring and testing

By particle light scattering

With photocell detection

356350, G01B 902

Patent

active

047550511

ABSTRACT:
There is provided by this invention a fiber optic transducer for accelerometers and gyroscopes that utilize an optical fiber suspended between two points and supported on a vibrating platform such that the optical fiber is deflected to cause light passing through the fiber to be phase modulated. When the device is accelerated, the deflection of the vibrating fiber is assymetrical, and the light passing through the fiber is phase modulated at frequency `f` and odd harmonics of `f`. The first in odd harmonic phase modulation has an amplitude proportional to the acceleration and a phase relative to the driving signal that depends on the direction of acceleration.

REFERENCES:
patent: 4345482 (1982-08-01), Adolfsson et al.
patent: 4452531 (1984-06-01), Person
patent: 4645345 (1987-02-01), Domann

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