Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/76784
Title: Resonant type Fabry-Perot optical fiber sensor, manufacturing method and air pressure detecting method
Other Titles: 谐振式法布里‑珀罗光纤传感器及制造和气压检测方法
Authors: Jin, W 
Ma, J 
He, H 
Issue Date: 8-Feb-2017
Source: 中国专利 ZL 201410206090.X How to cite?
Abstract: The invention provides a resonant type Fabry-Perot optical fiber sensor which comprises a sensor body and a through hole penetrating through the sensor body. One end of the through hole is provided with a graphene thin film for sensing the to-be-detected air pressure in an attached mode, and the other end of the through hole is provided with transmission optical fibers which penetrate through the through hole and are matched with the through hole. According to the resonant type Fabry-Perot optical fiber sensor, the air pressure of gas is calculated in the mode that graphene thin film resonant frequency changes are caused by damp of the gas to the graphene thin film, so that a closed Fabry-Perot cavity is not needed, and the manufacturing difficulty is reduced; the the original measurement thin film deformation quantity is replaced by resonance to further conduct air pressure measurement, and thin film material creeping caused by repeated film deformation is effectively reduced; digital frequency signals after probe laser detection are output after the sensor conducts detection, and result analysis can be conveniently carried out compared with light wave signals of an interferometric sensor. Stimulation and detection are carried out through the single transmission optical fibers, and long-distance air pressure measurement can be achieved, and the applicability of the sensor is greatly improved.
本发明提供了一种谐振式法布里‑珀罗光纤传感器,包括传感器体以及贯穿传感器体的通孔;通孔的一端贴设有用于传感待测气压的石墨烯薄膜;另一端设有贯穿至通孔内并与通孔适配的传输光纤。本发明的谐振式法布里‑珀罗光纤传感器,通过气体对石墨烯薄膜的阻尼引起石墨烯薄膜谐振频率的变化计算气体气压;因此无需密封的法布里‑珀罗腔,降低了制作难度;而且用谐振替代原有测量薄膜形变量进而测量气压,有效降低了膜片反复形变导致的薄膜材料蠕变;而且传感器检测后输出的是经探测光转换的数字式频率信号,相比干涉传感器的光波信号更加便于结果分析;而且通过单根传输光纤进行激发和探测,可实现远程气压测量,大大提高了传感器的适用性。
URI: http://hdl.handle.net/10397/76784
Rights: Assignee: Shenzhen Res Inst The Hong Kong Polytechnic University
Patent
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