| 基于光纤耦合器的声发射传感器 |
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| 引用本文： | 马良柱,常军,刘统玉,霍佃恒. 基于光纤耦合器的声发射传感器[J]. 应用光学, 2008, 29(6): 990-994 |
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| 作者姓名： | 马良柱 常军 刘统玉 霍佃恒 |
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| 作者单位： | 山东科学院,激光研究所,山东,济南,250014 |
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| 基金项目： | 863计划子课题"新型实用高灵敏度纤栅式地震检波器的研制"，国家科技支撑计划子课题 |
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| 摘 要： | 为检测变压器内局部放电产生的声发射信号，介绍了一种基于特殊光纤熔融拉锥耦合器型声发射传感器。它是利用声波引起的扰动改变耦合器两臂光功率输出的特点来检测声发射信号。实验结果表明：此种传感器在10kHz～250kHz范围内对声发射信号有良好响应，在155kHz灵敏度为5.6×10-6V/Pa，噪声为1.8Pa声压，有望在复合材料与结构、电力无损检测方面得到应用。
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| 关 键 词： | 光纤传感器 声发射/超声 熔融拉锥过度耦合器 |
| 收稿时间： | 2008-01-17 |
Acoustic emission sensor based on fiber coupler |
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| MA Liang-zhu,CHANG Jun,LIU Tong-yu,HUO Dian-heng. Acoustic emission sensor based on fiber coupler[J]. Journal of Applied Optics, 2008, 29(6): 990-994 |
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| Authors: | MA Liang-zhu CHANG Jun LIU Tong-yu HUO Dian-heng |
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| Affiliation: | Laser Institute, Shandong Academy of Science, Jinan 250014, China |
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| Abstract: | An acoustic emission (AE) sensor based on over fused-taper fiber coupler is introduced to detect the acoustic emission signal produced by partial discharge in transformer. The AE sensor detects the AE signal according to the turbulence caused by the acoustic wave,which may change the optical power output of the two coupling arms. The experimental results prove that such kind of sensor has a flat response to AE in 10 kHz～250 kHz and its typical sensitivity is 5.6×10－6V/Pa with a noise of 1.8 Pa at 155 kHz. |
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| Keywords: | fiber sensor acoustic emission/ultrasound over fused-taper fiber coupler |
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