公开(公告)号：US11340065B2

公开(公告)日：2022-05-24

申请号：US16508999

申请日：2019-07-11

申请人： Qilu University of Technology(Shandong Academy of Sciences)

发明人： Shaodong Jiang ,  Chang Wang ,  Qingchao Zhao ,  Yingying Wang ,  Faxiang Zhang ,  Jiasheng Ni ,  Xiaohui Liu ,  Xiaolei Zhang ,  Hui Li ,  Long Ma

IPC分类号： G01C9/06 ,  G01C9/14

摘要： An optical fiber inclination measurement apparatus and a differential inclination measurement system are provided, which is related to the field of monitoring technology. The apparatus includes a supporting mechanism with a base and a base frame, a swinging mechanism with a pendulum, a cycloid, and a first reflective film is disposed on the pendulum. The measurement mechanism includes a first optical fiber, and an end surface of the first optical fiber is disposed opposite to the first reflective film. During an earthquake generating process, a landform changes and the pendulum swings, resulting in changes in displacement. The end surface of the first optical fiber together with the first reflective film form a Fabry-Perot cavity. The cavity length of the Fabry-Perot cavity changes before and after the landform deforms, and an angle of inclination is equal to a value obtained by dividing the cavity length variation of the Fabry-Perot cavity by the pendulum length.