公开(公告)号：WO0140742A2

公开(公告)日：2001-06-07

申请号：PCT/US0029629

申请日：2000-10-26

Applicant: LITTON SYSTEMS INC

Inventor： FERSHT SAMUEL N ,  HALL DAVID B ,  BATHELT CARL

IPC: G01H1/00 ,  G01H9/00 ,  G01P15/093 ,  G01V1/18 ,  G02B6/00

CPC classification number: G01V1/186 ,  G01H9/004 ,  G01P15/093

Abstract: A fiber optic seismic sensor (10) includes a pair of central support members (30, 32) formed of a metal such as aluminum. A support plate (42) has an inner portion (39) retained between the central support members (30, 32) and an outer portion (41) that extends beyond the central support members (30, 32). A pair of hollow cylindrical substrates (14, 18) are mounted in axial alignment on opposite sides of the outer portion (41) of the support plate (41) with the central support members (30, 32) extending through the centers of the substrates (14, 18). The central support member (30) has a cavity (36) in one end, and the central support member (32) has a projection (38) extending therefrom and arranged to be received within the cavity (36) in the first central support member (30). The support plate (42) includes a passage (44) arranged to receive the projection (38) such that the inner portion (39) of the support plate (42) is retained between the first and second central support members (30, 32). A first spiral-wound optical fiber coil (14) is formed on an outer end (22) of the first substrate (14), and a second spiral-wound optical fiber coil (16) is formed on an outer end (26) of the second substrate (16). An interferometer (50) includes the first spiral-wound optical fiber coil (14) in a first leg and the second spiral-wound optical fiber coil (16) in a second leg. Acceleration along an axis perpendicular to the planes of the optical fiber coils (14, 16) causes a deflection in the support plate (42), which changes the difference in length of optical fiber coils (14, 16).

Abstract translation: 光纤地震传感器（10）包括由金属（例如铝）形成的一对中心支撑构件（30,32）。 支撑板（42）具有保持在中心支撑构件（30,32）之间的内部部分（39）和延伸超过中心支撑构件（30,32）的外部部分（41）。 一对中空圆柱形基板（14,18）以支撑板（41）的外部部分（41）的相对侧轴向对准地安装，中心支撑构件（30,32）延伸穿过基板的中心 （14,18）。 中心支撑构件（30）在一端具有空腔（36），并且中心支撑构件（32）具有从其延伸的突出部（38）并布置成容纳在第一中心支撑构件 （30）。 支撑板（42）包括布置成容纳突起（38）的通道（44），使得支撑板（42）的内部部分（39）保持在第一和第二中心支撑构件（30,32）之间， 。 第一螺旋卷绕光纤线圈（14）形成在第一基板（14）的外端（22）上，第二螺旋缠绕光纤线圈（16）形成在第二螺旋卷绕光纤线圈（16）的外端 第二基板（16）。 干涉仪（50）包括第一支腿中的第一螺旋缠绕光纤线圈（14）和第二支腿中的第二螺旋缠绕光纤线圈（16）。 沿着垂直于光纤线圈（14,16）的平面的轴的加速度导致支撑板（42）中的偏转，这改变了光纤线圈（14,16）的长度差。

公开(公告)号：DE60035118D1

公开(公告)日：2007-07-19

申请号：DE60035118

申请日：2000-10-26

Applicant: LITTON SYSTEMS INC

Inventor： FERSHT SAMUEL N ,  HALL DAVID B ,  BATHELT CARL

IPC: G01H9/00 ,  G01H1/00 ,  G01P15/08 ,  G01P15/093 ,  G01V1/18 ,  G02B6/00

Abstract: A fiber optic seismic sensor includes a central support assembly formed of a metal such as aluminum. A support plate has an inner portion retained within the central support assembly and an outer portion that extends beyond the central support assembly. A pair of hollow cylindrical substrates are mounted in axial alignment on opposite sides of the outer portion of the support plate with the central support assembly extending through the centers of the substrates. The central support assembly comprises a first central support member having a cavity in one end, and a second central support member having a projection extending therefrom and arranged to be received within the cavity in the first central support member. The support plate includes a passage arranged to receive the projection such that the inner portion of the support plate is retained between the first and second central support members. A first spiral-wound optical fiber coil is formed on an outer end of the first substrate, and a second spiral-wound optical fiber coil is formed on an outer end of the second substrate. An interferometer includes the first spiral-wound optical fiber coil in a first leg and the second spiral-wound optical fiber coil in a second leg. Acceleration along an axis perpendicular to the planes of the optical fiber coils causes a deflection in the support plate, which changes the pathlength difference between the legs of the interferometer.