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    • 72. 发明授权
    • Fiber optic sensors for composite pressure tanks with micro bend pinch points
    • 用于具有微弯曲夹点的复合压力罐的光纤传感器
    • US07687764B1
    • 2010-03-30
    • US10804203
    • 2004-03-19
    • Ronald H. Knapp
    • Ronald H. Knapp
    • G01J1/04G01J1/42G01J5/08
    • G01M5/0041G01D5/35345G01D5/35374G01D11/245G01L1/245G01L11/025G01M5/0091
    • A low-cost fiber-optic sensor system for composite pressure tanks detects structural degradation of composite material pressure tanks. Light power attenuation in embedded optical fiber simulates tank volume change and replaces hydrostatic tank testing. Current U.S. Department of Transportation rules require that all pressure tanks be hydrostatically tested to verify structural integrity. Tanks do not have to be removed from service for testing. With the invention, testing can be done in-situ. For composite LNG tanks used on vehicles or emergency inflation devices used on aircraft for escape ramps, in-situ testing offers substantial maintenance cost savings. because of the simplicity of the test procedure, more frequent structural checks can be made economically to improve the safe operation of composite tanks.
    • 用于复合压力罐的低成本光纤传感器系统检测复合材料压力罐的结构退化。 嵌入式光纤中的光功率衰减模拟罐体积变化,并代替静水罐测试。 目前美国交通运输部的规定要求对所有压力罐进行流体静力测试,以验证结构完整性。 坦克不需要从服务中删除以进行测试。 通过本发明,可以原位进行测试。 对于在车辆上使用的复合液化天然气坦克或用于逃生斜坡的飞机上的紧急通风装置,现场测试可节省大量维护成本。 由于测试程序的简单性,可以经济地进行更频繁的结构检查,以改善复合罐的安全运行。
    • 75. 发明授权
    • Optical rotary microbend position sensors having a rotatable movable
shaft
    • 具有可旋转的可动轴的光学旋转微弯位置传感器
    • US5274226A
    • 1993-12-28
    • US977474
    • 1992-11-17
    • John J. KidwellStuart E. Reed
    • John J. KidwellStuart E. Reed
    • G01D5/353H01J5/16
    • G01D5/35345G01D5/35374
    • A single optical fiber is used for measuring angular or rotational position in a rotary sensor. The optical fiber is used in connection with known analog intensity opto-electronics. The optical fiber is used in connection with a microbending device housed within the sensor. An input shaft of the sensor experiencing rotational motion causing the microbending device to subject the optical fiber to microbending. Microbending can be caused by a crankpin, pins located on the shaft within the housing, a transverse hole located through the shaft, or other loading arrangement. A micrometer lead screw can be used within the housing to convert the rotational motion into linear motion. The converted linear displacement is used to compress the optical fiber. Where the input shaft experiences many rotations or multiple turns the linear displacement can be applied to a spring element for carrying a load or force to a compression device. Microbending experienced by the optical fiber causes a change in the fiber radius of curvature. These microbending losses are then measured by the opto-electronics or photodetection arrangements.
    • 单个光纤用于测量旋转传感器中的角度或旋转位置。 光纤与已知的模拟强度光电元件结合使用。 光纤用于与传感器内容纳的微弯曲装置相结合。 传感器的输入轴经历旋转运动,导致微弯曲装置使光纤受到微弯曲。 微弯可以由曲柄销,位于壳体内的轴上的销,穿过轴的横向孔或其他装载装置引起。 可以在外壳内使用千分尺丝杠将旋转运动转换成直线运动。 转换的线性位移用于压缩光纤。 在输入轴经受许多转动或多圈的情况下,可以将线性位移施加到弹簧元件,以将负载或力传递到压缩装置。 光纤经历的微弯导致纤维曲率半径的变化。 然后通过光电子或光电检测装置测量这些微弯损耗。
    • 77. 发明授权
    • Fiber optic load sensing device
    • 光纤负载传感装置
    • US5056884A
    • 1991-10-15
    • US508139
    • 1990-04-10
    • Thomas J. Quinlan, Jr.
    • Thomas J. Quinlan, Jr.
    • G01D5/353G08G1/02
    • G01L1/242G01D5/35374G08G1/02
    • A transverse load sensitive optical treadle switch. The switch includes a deformable longitudinal housing and a fiber optic assembly positioned within the housing. The fiber optic assembly includes an optical fiber having a first end and a second end, the optical fiber being subject to bending upon application of a transverse load to said housing. Means for mounting the optical fiber in the housing so as to permit bending of the fiber in response to application of a transverse load to said housing are provided, the degree of bending being sufficient to cause a significant decrease in passage of light through said fiber when said fiber is bent. Means permitting introduction of light into said optical fiber at the first end of the optical fiber and means for permitting the exit of light from the second end are also provided.
    • 横向负载敏感光学踏板开关。 开关包括可变形纵向壳体和位于壳体内的光纤组件。 所述光纤组件包括具有第一端和第二端的光纤,所述光纤在向所述壳体施加横向载荷时经受弯曲。 提供了用于将光纤安装在壳体中以便允许响应于向所述壳体施加横向载荷而弯曲纤维的装置,弯曲程度足以导致光通过所述光纤的显着减少, 所述纤维弯曲。 允许在光纤的第一端将光引入所述光纤的装置以及允许从第二端退出光的装置。