| 光纤法布里珀罗声发射传感系统 |
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| 引用本文： | 陈娜,丁悦通,孙庆国,庞拂飞,陈振宜,王廷云.光纤法布里珀罗声发射传感系统[J].光通信技术,2010,34(3). |
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| 作者姓名： | 陈娜 丁悦通 孙庆国 庞拂飞 陈振宜 王廷云 |
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| 作者单位： | 特种光纤与光接入网省部共建重点实验室培育基地,上海大学,上海,200072 |
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| 基金项目： | 上海市重点学科和科委重点实验室项目，上海市教育发展基金会"晨光计划"项目，上海市自然科学基金项目，上海大学创新基金项目 |
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| 摘 要： | 实现了一种由多个光纤法布里珀罗传感器构成的声发射传感系统,可用于变压器局部放电的检测与定位.该系统利用光纤法布里珀罗声发射传感器实现信号采集,利用门限检测的方法实现信号检测,并通过计算信号达到不同传感头的时延差实现放电源的空间定位,具有传感头尺寸小、系统结构简单、抗电磁干扰性能强等优势.
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| 关 键 词： | 光纤传感器 声发射检测 门限判决 变压器局部放电 定位 |
Fiber Fabry-Perot acoustic emission sensing system |
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| Abstract: | An acoustic emission sensing system is constructed with four fiber Fabry-Perot sensors, which can be used in power transformer partial discharge detection and location. Ultrasonic signals are added on the reflected optical signals by fiber Fabry-Perot acoustic emission sensors and converted to electrical signal. The threshold decision method is adopted in the system to judge whether the ultrasound wave has already arrived to the sensor instead of using Analog to Digital (A/D) converters, data sampling and analysis. Based on the signal arrival time delay of different sensor partial discharge can be located. The system has very small size and good immunity to electromagnetic interference and can be constructed easily. |
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| Keywords: | fiber sensor acoustic emission threshold decision power transformer partial discharge location |
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