Fiber-optic accelerometer having cantilevered acceleration-sensi

Details Fiber-optic accelerometer having cantilevered acceleration-sensi Fiber-optic accelerometer having cantilevered acceleration-sensi

1987-04-10

1988-04-26

Chapman, John

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

73653, 250227, 250231R, G01P 1508, G01H 900

Patent

active

047396610

ABSTRACT:
An optical fiber accelerometer with a rectilinear actuator, such as a push rod, acting on a middle region of an optical fiber pass tautly strung between two supports so that linear actuator motion during sensed acceleration causes lateral displacement of the pass's middle region causing nonlinear (i.e., quadratic) strain in the fiber. This nonlinear response allows the accelerometer to detect acceleration signals in a noisy, low-frequency signal environment through use of a high frequency signal carrier whose amplitude is determined by a low-frequency measured acceleration signal using an optical fiber interferometer.

REFERENCES:
patent: 4466295 (1984-08-01), Wesson
A. Kersey, F. Bucholtz, and A. Dandridge, "New Nonlinear Phase Conduction thod for DC Measurand Interferometric Fibre Sensors," Electronics Letters, vol. 22, No. 2, (Jan. 16, 1986), pp. 75-76.
F. Bucholtz, A. Kersey and A. Dandridge, "DC Fibre-Optic Accelerometer with Sub-.mu.g Sensitivity," Electronics Letters, vol. 22, No. 9, (Apr. 24, 1986), pp. 451-453.

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