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    • 9. 发明申请
    • LOW-COST FIBER OPTIC SENSOR FOR LARGE STRAINS
    • 用于大型应变的低成本光纤传感器
    • US20160305771A1
    • 2016-10-20
    • US15098891
    • 2016-04-14
    • Rahul PanatLei Li
    • Rahul PanatLei Li
    • G01B11/16G02B6/02
    • G02B6/02142G01B11/18G02B5/1847G02B6/02066G02B6/02071G02B6/02095G02B6/021G02B6/02123G02B6/02152G02B6/0229G02B6/02395G02B2006/02161
    • A fiber grating device of low cost and arbitrary length is formed on a portion of a portion or the entirety of a highly elastic fiber optic core having a low Young's modulus of elasticity by causing elongation of the fiber optic core and forming or depositing a hard skin or cladding on the elongated fiber optic core. When the stress is then released, the hard skin or cladding buckles (including elastic or plastic deformation or both) to form wrinkles at the interface of the fiber optic core and the hard skin or cladding which are oriented circumferentially and highly uniform in height and spacing which can be varied at will by choice of materials, stretching, and thickness and composition of the cladding. Since the elastic elongation of the fiber optic core portion may be 200% or greater, an unprecedented measurement range is provided.
    • 低成本和任意长度的光纤光栅装置通过引起光纤芯的伸长并形成或沉积硬皮来形成具有低杨氏弹性模量的高弹性光纤芯的一部分或全部的一部分 或在细长光纤芯上包覆。 当应力被释放时,硬质皮肤或包覆层(包括弹性或塑性变形或两者)在光纤芯和硬皮或包层的界面处形成褶皱,其在高度和间隔上周向定向且高度均匀 其可以随意地通过材料的选择,拉伸以及包层的厚度和组成而变化。 由于光纤芯部的弹性伸长率可以为200%以上,因此提供前所未有的测量范围。