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首页> 外文期刊>Applied optics >Underwater blast wave pressure sensor based on polymer film fiber Fabry-Perot cavity
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Underwater blast wave pressure sensor based on polymer film fiber Fabry-Perot cavity

机译：基于聚合物薄膜纤维法布里-珀罗腔的水下爆炸波压力传感器

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摘要

This paper describes the theoretical and experimental aspects of an optical underwater shock wave sensor based on a polymer film optical fiber Fabry-Perot cavity manufactured by vacuum deposition technology. The transduction mechanism of the sensor involves a normally incident acoustic stress wave that changes the thickness of the polymer film, thereby giving rise to a phase shift. This transient interferometric phase is interrogated by a three-phase-step algorithm. Theoretically, the sensor-acoustic-field interaction principle is analyzed, and the phase modulation sensitivity based on the theory of waves in the layered media is calculated. Experimentally, a static calibration test and a dynamic calibration test are conducted using a piston-type pressure calibration machine and a focusing-type electromagnetic shock wave. Results indicate that the repeatability, hysteresis, nonlinearity, and the overall measurement accuracy of the sensor within the full pressure range of 55 MPa are 1.82%, 0.86%, 1.81%, and 4.49%, respectively. The dynamic response time is less than 0.767 μs. Finally, three aspects that need further study for practical use are pointed out.
机译：本文介绍了一种基于真空沉积技术制造的聚合物薄膜光纤Fabry-Perot腔的光学水下冲击波传感器的理论和实验方面。传感器的转换机制涉及一个垂直入射的声应力波，该声波会改变聚合物膜的厚度，从而引起相移。该瞬态干涉测量阶段通过三相步进算法进行询问。从理论上分析了传感器与声场的相互作用原理，并基于波理论对层状介质中的相位调制灵敏度进行了计算。实验上，使用活塞型压力校准机和聚焦型电磁冲击波进行静态校准测试和动态校准测试。结果表明，在55 MPa的整个压力范围内，传感器的重复性，滞后，非线性和整体测量精度分别为1.82％，0.86％，1.81％和4.49％。动态响应时间小于0.767μs。最后，指出了需要实际研究的三个方面。

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