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Novel Fiber Optic Acoustic Sensor System

新型光纤声学传感器系统

基本信息

批准号：
0123222
负责人：
Balakumar Balachandran
金额：
$ 4.04万
依托单位：
University of Maryland, College Park
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2001
资助国家：
美国
起止时间：
2001-09-01 至 2003-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0123222&HistoricalAwards=false
关键词：
Novel Fiber Optic Acoustic Sensor

项目摘要

This grant provides funding for exploring the development of a novel fiber optic acoustic system for high-frequency bandwidth measurements. The novelty of the sensor system will be derived from the inclusion of extrinsic sensing capabilities based on a Fabry-Perot cavity, an integrated optical circuit based phase modulator, a high-speed photo detector, and a digital demodulation scheme based on a new multi-step phase stepping algorithm. The Fabry-Perot cavity will be located between the fiber tip and the diaphragm structure of the sensor, and the Mach-Zehnder interferometer in the phase modulator will be path matched with the Fabry-Perot arrangement to act as a read-out interferometer. Both experimental efforts and analytical efforts will be pursued for developing the sensor and understanding the sensor mechanics. A potential risk involved in the development of this sensor system is that it may not be amenable to multiplexing as the other fiber-optic sensors. If successful, the development of this sensor system will have a tremendous impact on integrated active control systems for sound and vibration transmission problems where currently multiplexable sensors for high-frequency bandwidth applications are not readily available. Furthermore, if the sensor system is adapted, it can be used for high-frequency bandwidth pressure measurements in underwater flows. The sensor system may also have applications in the automotive industry such as ignition chambers

这笔赠款为探索开发用于高频带宽测量的新型光纤声学系统提供资金。传感器系统的新奇将来自于包含基于法布里-珀罗腔的非本征传感能力、基于集成光学电路的相位调制器、高速光电探测器和基于新的多步相位步进算法的数字解调方案。法布里-珀罗腔将位于光纤尖端和传感器的膜片结构之间，并且相位调制器中的马赫-曾德尔干涉仪将与法布里-珀罗布置路径匹配以充当读出干涉仪。实验工作和分析工作将追求开发传感器和理解传感器力学。这种传感器系统的开发中涉及的潜在风险是，它可能不像其他光纤传感器那样适合多路复用。如果成功的话，这种传感器系统的开发将对集成主动控制系统的声音和振动传输问题产生巨大的影响，其中目前用于高频带宽应用的多路复用传感器还不容易获得。此外，如果传感器系统是适应的，它可以用于在水下流的高频带宽的压力测量。该传感器系统还可以在汽车工业中具有应用，例如点火室