Research Center for Sensor Technology, Beijing Key Laboratory for Sensor, Ministry of Education Key Laboratory for Modern Measurement and Control Technology, School of Applied Sciences, Beijing Information Science and Technology University, Beijing 100101, China.
College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China.
Sensors (Basel). 2018 Oct 10;18(10):3393. doi: 10.3390/s18103393.
Fiber Fabry⁻Perot cavity sensing probes with high thermal stability for dynamic signal detection which are based on a new method of structure compensation by a proposed thermal expansion model, are presented here. The model reveals that the change of static cavity length with temperature only depends on the thermal expansion coefficient of the materials and the structure parameters. So, fiber Fabry⁻Perot cavity sensing probes with inherent temperature insensitivity can be obtained by structure compensation. To verify the method, detailed experiments were carried out. The experimental results reveal that the static cavity length of the fiber Fabry⁻Perot cavity sensing probe with structure compensation hardly changes in the temperature range of -20 to 60 °C and that the method is highly reproducible. Such a method provides a simple approach that allows the as-fabricated fiber Fabry⁻Perot cavity acoustic sensor to be used for practical applications, exhibiting the great advantages of its simple architecture and high reliability.
本文提出了一种基于热膨胀模型的新型结构补偿方法，用于制作具有高热稳定性的光纤法布里-珀罗腔传感探头，以实现动态信号检测。该模型表明，静态腔长随温度的变化仅取决于材料的热膨胀系数和结构参数。因此，通过结构补偿可以获得具有固有温度不敏感性的光纤法布里-珀罗腔传感探头。为了验证该方法，进行了详细的实验。实验结果表明，结构补偿的光纤法布里-珀罗腔传感探头的静态腔长在-20 至 60°C 的温度范围内几乎没有变化，并且该方法具有高度的可重复性。这种方法提供了一种简单的方法，可以使制造的光纤法布里-珀罗腔声传感器能够用于实际应用，具有结构简单和可靠性高的优点。
