Self-Calibrated Interferometric/Intensity-Based Fiber Optic Pressure Sensors
Self-Calibrated Interferometric/Intensity-Based Fiber Optic Pressure Sensors
复制标题
自校准干涉/基于强度的光纤压力传感器
DOI：
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复制
发表时间：
2000
期刊：
影响因子：
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通讯作者：
H. Xiao
中科院分区：
文献类型：
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作者：
H. Xiao
为了实现提供能够在恶劣环境中工作的鲁棒性和可靠性的光纤压力传感器的目标，本文提出了详细的研究工作的设计，建模，实现，分析和性能评估的新型光纤自校准干涉/强度为基础（SCIIB）的压力传感器系统。SCIIB技术通过自参考两路输出，首次实现了对光源功率波动和光纤损耗变化的完全补偿。基于SCIIB原理，设计并成功实现了基于多模和单模光纤的SCIIB传感系统。为了实现SCIIB技术的所有潜在优势，提出、设计并开发了新型受控热键合方法，以制造具有优异机械强度和温度稳定性的高性能光纤法布里-珀罗传感器探针。研究了传感器对压力和温度响应的数学模型，为传感器探头的优化设计提供了指导。固体和详细的噪声分析也提供了一个更好的理解SCIIB系统的性能限制。根据系统噪声分析结果，提出了改善系统性能的优化措施。还进行了广泛的实验，以系统地评估仪器系统和传感器探头的性能。主要测试结果使我们有信心相信，光纤SCIIB压力传感器系统的开发提供了一种可靠的压力测量工具，能够在高压，高温恶劣环境下工作。
To fulfill the objective of providing robust and reliable fiber optic pressure sensors capable of operating in harsh environments, this dissertation presents the detailed research work on the design, modeling, implementation, analysis, and performance evaluation of the novel fiber optic self-calibrated interferometric/intensity-based (SCIIB) pressure sensor system. By self-referencing its two channels outputs, for the first time to our knowledge, the developed SCIIB technology can fully compensate for the fluctuation of source power and the variations of fiber losses. Based on the SCIIB principle, both multimode and single-mode fiber-based SCIIB sensor systems were designed and successfully implemented. To achieve all the potential advantages of the SCIIB technology, the novel controlled thermal bonding method was proposed, designed, and developed to fabricate high performance fiber optic Fabry-Perot sensor probes with excellent mechanical strength and temperature stability. Mathematical models of the sensor in response to the pressure and temperature are studied to provide a guideline for optimal design of the sensor probe. The solid and detailed noise analysis is also presented to provide a better understanding of the performance limitation of the SCIIB system. Based on the system noise analysis results, optimization measures are proposed to improve the system performance. Extensive experiments have also been conducted to systematically evaluate the performance of the instrumentation systems and the sensor probes. The major test results give us the confidence to believe that the development of the fiber optic SCIIB pressure sensor system provides a reliable pressure measurement tool capable of operating in high pressure, high temperature harsh environments.