Fiber-optic accelerometer

Details Fiber-optic accelerometer Fiber-optic accelerometer

1990-09-19

1992-08-04

Chapman, John E.

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

73653, 25022717, G01P 1508

Patent

active

051348829

ABSTRACT:
An accelerometer includes a compliant cylinder supported midway along its length and having equal masses at opposite ends. Two birefringent optical fibers with elliptical cores are wound around the cylinder in opposite senses on opposite sides of the support. Radiation from a source is supplied to one end of both fibers and emerges from the opposite end where it is supplied to respective photodiodes via respective polarizers. Acceleration axially of the cylinder causes extensive strain in one fiber and compressive strain in the other which causes equal and opposite changes in birefringence. A processor subtracts the change in outputs of the photodiodes to provide an acceleration output that is independent of temperature.

REFERENCES:
patent: 4442350 (1984-04-01), Rashleigh
patent: 4516021 (1985-05-01), Taylor
patent: 4534222 (1985-08-01), Finch et al.
patent: 4613752 (1986-09-01), Davis
patent: 4799752 (1989-01-01), Carome
patent: 4829821 (1989-05-01), Carome

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