Departamento de Tecnología Electrónica, Universidad Carlos III de Madrid, Leganés, 28911, Madrid, Spain; E-Mail:
Sensors (Basel). 2009;9(8):6446-55. doi: 10.3390/s90806446. Epub 2009 Aug 20.
A novel self-referencing fiber optic intensity sensor based on bending losses of a partially polished polymer optical fiber (POF) coupler is presented. The coupling ratio (K) depends on the external liquid in which the sensor is immersed. It is possible to distinguish between different liquids and to detect their presence. Experimental results for the most usual liquids found in industry, like water and oil, are given. K value increases up to 10% from the nominal value depending on the liquid. Sensor temperature dependence has also been studied for a range from 25 °C (environmental condition) to 50 °C. Any sector requiring liquid level measurements in flammable atmospheres can benefit from this intrinsically safe technology.
提出了一种基于部分抛磨聚合物光纤（POF）耦合器弯曲损耗的新型自参考光纤强度传感器。耦合比（K）取决于传感器浸入的外部液体。可以区分不同的液体并检测它们的存在。给出了工业中最常见的液体（如水和油）的实验结果。K 值根据液体的不同，从标称值增加了 10%。还研究了传感器的温度依赖性，范围从 25°C（环境条件）到 50°C。任何需要在易燃环境中测量液位的部门都可以从这项本质安全技术中受益。
