1. Institute of electrical engineering, Chinese Academy of sciences, Beijing 100190, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:Vibrant characteristics are important to design the ultrasonic fiber Fabry-Perot sensors used for partial discharges detection. The vibrations of the film in the sensors could be simplified as tow-order vibrations with lumped parametrers. Lumped parameters (mechanical impedance, equivalent mass, elastic coefficient, concentrated force) in two-order vibrant equations were analyzed for the FP sensors in liquid.The formulations between sensor’s resonant frequencies, amplitude sensitivities and structure parameters were obtained. For a vibrant plate with 2.52 mm-diameter and 150 μm-thickness in the sensor, the resonant frequencies were 205 kHz in atmosphere and 115 kHz in water, and the amplitude sensitivities was about 18 pm/Pa on 115 kHz frequency in water. The minimum detectable acoustic pressure is about 1Pa with the fabricated sensors.
[1] Jo W, Akkaya O C, Solgaard O, et al. Miniature fiber acoustic sensors using a photonic-crystal membrane [J]. Optical Fiber Technology, 2013, 19(6B): 785-792.
[2] 柯涛,朱涛,饶云江,等.基于空芯光子晶体光纤的全光纤法布里_珀罗干涉式加速度传感器[J].中国激光,2010, 37(1): 171-175.
KE Tao, ZHU Tao, RAO Yun-jiang, et al. Accelerometer
based on all-fiber fabry-perot interferometer formed by hollow-core photonic crystal fiber [J]. Chinese Journal of Lasers, 2010, 37(1): 171-175.
[3] 王文辕,文建湘,庞拂飞,等.飞秒激光制备的全单模光纤法布里_珀罗干涉高温传感器[J].中国激光,2012,39(10): 85-89.
WANG Wen-yuan, WEN Jian-xiang, PANG Fu-fei, et al. All single-mode fiber fabry-perot interferometric hight temperature sensor fabricated with femtosecond laser [J]. hinese Journal of Lasers, 2012, 39(10): 85-89.
[4] 朱佳利,王鸣,蔡东艳,等. 光纤法布里_珀罗微压传感器[J].光学学报,2014,34(4): 274-277.
ZHU Jia-li, WANG Ming, CAI Dong-yan, et al. A fiber fabry-perot micro pressure sensor[J]. Acta optica Sinica, 2014, 34(4): 274-277.
[5] Yu B, Kim D W, Deng J D, et al. Fiber fabry-perot sensors for detection of partial discharges in power transformer [J]. Applied Optics, 2003, 42(16): 3241-3250.
[6] Wang X D, Li B Q, Xiao Z X, et al. An ultra-sensitive optical MEMS sensor for partial discharge detection [J]. Journal of Micromechanics and Microengineering, 2005, 15(3): 521-527.
[7] Wang X D, Li B Q, Roman H T, et al. Acousto-optical PD detection for transformers[J]. IEEE Transactions on Power Delivery, 2006, 21(3): 1068-1073.
[8] 赵洪,李敏,王萍萍,等.用于液体介质中局放声测的非本征光纤法珀传感器[J].中国电机工程学报,2008, 28(22): 59-63.
ZHAO Hong, LI Ming, WANG Ping-ping, et al. Extrinsic fiber fabry-perot sensors for pd-induced acoustic emission detection in liquid dielectrics [J]. Proceedings of the CSEE, 2008, 28(22): 59-63.
[9] 王伟,王赞,吴延坤,等.用于油中局部放电检测的Fabry- Perot光纤超声传感技术[J]. 高电压技术,2014, 40(3): 814-821.
WANG Wei, WANG Zan, Wu Yan-kun, et al. Fabry-Perot optical fiber ultrasonic sensing technology for detection of
partial discharge in the oil [J]. High Voltage Engineering, 2014, 40(3): 814-821.
[10] 陈娜,丁悦通,孙庆国,等. 光纤法布里珀罗声发射传感系统[J]. 光通信技术,2010(3): 1-3.
CHEN Na, DING Yue-tong, SUN Qing-guo, et al. Fiber Fabry-Perot acoustic emission sensing system [J]. Optical Communication Technology, 2010(3): 1-3.
[11] 朱德恒,谈克雄,王昌长,等.在线检测变压器局部放电的微机系统[J]. 高电压技术,1992, 63(1):45-49.
ZHU De-huan, TAN Ke-xiong, WANG Chang-chang, et al. Computer-Aided detection system for detecting partial discharge in power transformer [J]. High Voltage Engineering, 1992, 63(1): 45-49.
[12] 周力行,何蕾,李卫国. 变压器局部放电超声信号特性及放电源定位[J]. 高电压技术,2003, 29(5): 11-15.
ZHOU Li-xing, He Lei, LI Wei-guo. Research on characteristics of ultrasonic signal of partial discharge and partial discharge sources location in transformer [J]. High Voltage Engineering, 2003, 29(5): 11-15.
[13] IEEE Std C57. 127-2007,IEEE Guide for the Detection and Location of Acoustic Emissions From Partial
Discharges in Oil-Immersed Power Transformers and
Reactors [S].
[14] 汤渭霖,范军.水中弹性结构声散射和声辐射机理-结构和水的声-振耦合作用[J].声学学报,2004,29(5):385-392.
TANG Wei-lin, FAN Jun. Mechanisms of sound scattering and radiation of submerged elastic structure - vibro- acoustic coupling of structure and water[J]. Acta Acustica, 2004, 29(5): 385-392.
[15] 杜功焕,朱哲民,龚秀芬.声学基础[M]. 南京:南京大学出版社,2001:106-112.
[16] 陆明万,张雄,葛东云.工程弹性力学与有限元法[M].北京:清华大学出版社,2005: 132-135.
[17] 何祚镛,赵玉芳.声学理论基础[M].北京:国防工业出版社,1981:273-178.
[18] Mario D G. Flat and corrugated diaphragm design handbook (dekker mechanical engineering)[M]. New York: CRC Press, 1982: 196-197.