机构地区: 清华大学机械工程学院精密测试技术及仪器国家重点实验室
出 处: 《光电子技术》 2010年第1期7-9,15,共4页
摘 要: 提出了一种基于钯膜的非本征法布里-珀罗光纤氢气传感器的方案。钯在氢气环境中吸收一定量的氢并使其体积膨胀,而传感器腔长在应力的作用下发生变化。分析了其应力的传递过程,建立了法布里-珀罗腔腔长变化与氢浓度关系的数学模型。通过实验研究了该传感器的氢响应特性,理论模型预测的氢气浓度与实验结果吻合。 A new type of hydrogen sensor based on optical fiber extrinsic Fabry-Perot interferometric with palladium film is proposed. When exposed to hydrogen, the palladium absorbs hydrogen and produces a change in the gap length of the sensor. The stress transfer model of the sensor is analyzed and the relationship between the change of Fabry-Perot gap length and hydrogen concentration is constructed. The response of the sensor to hydrogen is measured. The analytical value is close to the experimental result.
领 域: [电子电信]