Wang Shuchao, Chen Weigen
State Key Laboratory of Transmission & Distribution Equipment and Power System Safety and New Technology (Ministry of Education), School of Electrical Engineering, Chongqing University, Chongqing 400044, China.
Nanomaterials (Basel). 2020 Nov 22;10(11):2312. doi: 10.3390/nano10112312.
This article presents an extrinsic fiber-optic acoustic sensor applied for partial discharge (PD) detection in air. A Fabry-Perot (F-P) cavity consisting of a single-mode fiber (SMF) and a graphene oxide (GO) film, whose thickness and effective vibration diameter are approximately 500 nm and 4.377 mm, respectively, is used as this sensing core, and the manufacturing process of GO diaphragms and this sensing probe is illustrated to be simple and controllable. Performance tests indicate that this proposed sensor maintains a linear acoustic-pressure response and a flat frequency response in the range of 200 Hz to 20 kHz, while being an omnidirectional sensor and having high working stability during a ten-day test period. Additionally, PD detection results show that the minimum PD size detected by this proposed sensor in air was approximately 100 pC, which demonstrates that this proposed sensor can achieve high-sensitivity PD detection in air.
本文介绍了一种用于空气中局部放电（PD）检测的外置光纤声学传感器。一个由单模光纤（SMF）和氧化石墨烯（GO）薄膜组成的法布里-珀罗（F-P）腔被用作该传感核心，其厚度和有效振动直径分别约为500 nm和4.377 mm，并且展示了GO膜片和该传感探头的制造过程简单且可控。性能测试表明，该传感器在200 Hz至20 kHz范围内保持线性声压响应和平坦频率响应，同时它是一个全向传感器，并且在为期十天的测试期间具有高工作稳定性。此外，局部放电检测结果表明，该传感器在空气中检测到的最小局部放电尺寸约为100 pC，这表明该传感器能够在空气中实现高灵敏度的局部放电检测。
