| 摘要 |
A proof mass (22) suspended in a cavity (31) in a housing (24) moves along a sensing axis in response to linear acceleration. Elastic support members (32 - 35) connected between the proof mass (22) and the housing (24) exert a reaction force on the proof mass (22) in response to displacement of the pro of mass (22) along the sensing axis. An optical fiber (16) is connected between the proof mass (22) and the housing (24) such that displacement of the proof mass (22) along the sensing axis elongates a first portion (13) of the optic al fiber (16) and shortens another portion (15). A pair of fiber optic Bragg grating (12, 14) formed in the optical fiber (16) are arranged to reflect an optical signal guided by the optical fiber (16). Acceleration of the proof mass (22) modulates the wavelength of the reflected optical signal such that the acceleration may be determined.
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