Broadband fiber optic acoustic sensor
申请(专利)号： EP20010306209
专利号： EP1176406B1 主分类号： G01H9/00
申请权利人： LITTON SYSTEMS
INC
公开国代码： EP 优先权国家： US
摘 要：
A displacement sensor (21) and an
acceleration sensor (23) are mounted to a common support member. The
displacement sensor (21) comprises a first circular flexural disk (40) having a natural frequency less than the frequency range of the acoustic waves of interest. Spiral-wound optical fiber coils (53, 55) are mounted to opposite sides of the first flexural disk (40). The acceleration sensor (23) comprises a second flexural disk (68) having a natural frequency greater than the frequency range of the acoustic waves. Spiral-wound optical fiber coils (53, 55) are mounted to opposite sides of the second flexural disk (68). A fiber optic interferometer provides an output signal that is a combination of signals output
申请日： 2001-07-19 公开公告日： 2005-06-01
分类号： G01H9/00;
G01P15/08; G01V1/18 发明设计人： GOLDNER, ERIC
LEE;
HALL, DAVID B.; TWEEDY, MICHAEL J.;
FERSHT, SAMUEL N. 申请国代码： EP
优先权： 20000724 US
220524 P; 20001025 US 696673
摘 要 附 图：
from the displacement sensor (21) and the acceleration sensor (23). The displacement sensor (21) includes an inertia ring (58) mounted to an edge of the first flexural disk (40) to keep it nearly stationary when an acoustic wave in the selected frequency range is incident upon the housing (22). The flexural disks (40, 68) include upper and lower rings (72, 74) spaced apart from the support post with portions of the disks (40, 68) between the rings (72, 74) and the support post
defining hinges (75) at which the flexural disks (40, 68) flex in response to
acceleration of the support member along its longitudinal axis. The surfaces of the first and second flexural disks (40, 68) preferably include grooves (84) extending between the upper rings (72) and the outer edges of the flexural disks (268, 274). The grooves (84) are arranged to allow lengths of optical fiber adjacent the rings (72, 74) to pass under the optical fiber coils (77, 79) that are formed on the surfaces of the flexural disks (40, 68). 主权项：
An acoustic sensor system (20) for measuring parameters of acoustic waves in a selected frequency ra
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Broadband fiber optic acoustic sensor
