Patent ID: 6496264
Filing Date: 2002-12-17
Classification: G01H,G01P

Abstract:
An acoustic sensor system for measuring parameters of acoustic waves in a selected frequency range, comprising:a support member; a displacement sensor mounted to the support member, the displacement sensor including: a first flexural disk, the first flexural disk having a first natural frequency that is less than the selected frequency range of the acoustic waves; a first upper spiral-wound optical fiber coil connected to the upper side of the first flexural disk; a first lower spiral-wound optical fiber coil connected to the lower side of the first flexural disk; an acceleration sensor mounted to the support member, the acceleration sensor including: a second flexural disk, the second flexural disk having a second natural frequency that is greater than the frequency range of the acoustic waves; a second upper spiral-wound optical fiber coil connected to the upper side of the second flexural disk; a second lower spiral-wound optical fiber coil connected to the lower side of the second flexural disk; and a fiber optic interferometer system arranged to provide an output signal that is a combination of signals output from the displacement sensor and the acceleration sensor.