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    • 3. 发明授权
    • Design and performance of a Fiber Bragg grating displacement sensor for measurement of movement
    • 用于测量运动的光纤布拉格光栅位移传感器的设计和性能
    • US07796843B2
    • 2010-09-14
    • US12052170
    • 2008-03-20
    • Gangbing SongPhilip C. NobleLiang RenMichael Conditt
    • Gangbing SongPhilip C. NobleLiang RenMichael Conditt
    • G02B6/00
    • G02B6/02171A61B5/1107A61B5/4523A61B5/4533A61B5/6828A61B5/6829A61B2562/0266G02B6/02066
    • A displacement sensor based on the underlying principle that when the outer surface of a quartz fiber (fiber optic cable) is etched to form a series of regularly spaced lines (a Fiber Bragg grating), laser light of a wavelength matching the spacing of the lines which enters one end of the fiber will be preferentially reflected. If the fiber is deformed, causing the line spacing to change, the wavelength of the reflected light will also change. This shift can be accurately measured and so can be related to the magnitude of the deformation of the fiber. This fiber is potted with epoxy resin in a narrow tube fabricated from a shape-memory alloy (SMA), and pre-formed into a curved shape. This not only protects the quartz fiber from direct contact with other objects and excessive bending, but also causes it to deform in a predictable fashion, thereby generating a reproducible response to displacement. Due to the high elastic behavior of the SMA tube, a displacement sensor with a gage length of 40 mm can measure displacements in excess of 3 mm.
    • 基于以下原理的位移传感器:当石英纤维(光纤电缆)的外表面被蚀刻以形成一系列规则间隔的线(光纤布拉格光栅)时,波长匹配线的间距的激光 进入光纤一端的光纤将被优先反射。 如果光纤变形,导致线间距发生变化,反射光的波长也会发生变化。 可以精确地测量这种变化,因此可以与纤维变形的大小有关。 该纤维在由形状记忆合金(SMA)制成的窄管中用环氧树脂封装,并预成形为弯曲形状。 这不仅可以保护石英纤维与其它物体的直接接触和过度的弯曲,而且可以使其以可预测的方式变形,从而产生对位移的可重现的响应。 由于SMA管的高弹性性能,具有40mm量规的位移传感器可以测量超过3mm的位移。
    • 4. 发明申请
    • DESIGN AND PERFORMANCE OF A FIBER BRAGG GRATING DISPLACEMENT SENSOR FOR MEASUREMENT OF MOVEMENT
    • 用于测量运动的光纤布拉格位移传感器的设计和性能
    • US20090022450A1
    • 2009-01-22
    • US12052170
    • 2008-03-20
    • Gangbing SongPhilip C. NobleLiang RenMichael Conditt
    • Gangbing SongPhilip C. NobleLiang RenMichael Conditt
    • G02B6/00
    • G02B6/02171A61B5/1107A61B5/4523A61B5/4533A61B5/6828A61B5/6829A61B2562/0266G02B6/02066
    • A displacement sensor based on the underlying principle that when the outer surface of a quartz fiber (fiber optic cable) is etched to form a series of regularly spaced lines (a Fiber Bragg grating), laser light of a wavelength matching the spacing of the lines which enters one end of the fiber will be preferentially reflected. If the fiber is deformed, causing the line spacing to change, the wavelength of the reflected light will also change. This shift can be accurately measured and so can be related to the magnitude of the deformation of the fiber. This fiber is potted with epoxy resin in a narrow tube fabricated from a shape-memory alloy (SMA), and pre-formed into a curved shape. This not only protects the quartz fiber from direct contact with other objects and excessive bending, but also causes it to deform in a predictable fashion, thereby generating a reproducible response to displacement. Due to the high elastic behavior of the SMA tube, a displacement sensor with a gage length of 40 mm can measure displacements in excess of 3 mm.
    • 基于以下原理的位移传感器:当石英纤维(光纤电缆)的外表面被蚀刻以形成一系列规则间隔的线(光纤布拉格光栅)时,波长匹配线的间距的激光 进入光纤一端的光纤将被优先反射。 如果光纤变形,导致线间距发生变化,反射光的波长也会发生变化。 可以精确地测量这种变化,因此可以与纤维变形的大小有关。 该纤维在由形状记忆合金(SMA)制成的窄管中用环氧树脂封装,并预成形为弯曲形状。 这不仅可以保护石英纤维与其它物体的直接接触和过度的弯曲,而且可以使其以可预测的方式变形,从而产生对位移的可重现的响应。 由于SMA管的高弹性性能,具有40mm量规的位移传感器可以测量超过3mm的位移。