聚苯胺包覆的倾斜光纤光栅氨气传感器  

Ammonia Gas Sensor Based on Tilted Fiber Bragg Grating Coated with Polyaniline

作　　者：王思博 张扬 徐海宁 阳甚祺 武小青 胡玉霞 WANG Sibo;ZHANG Yang;XU Haining;YANG Shenqi;WU Xiaoqing;HU Yuxia(School of Physics,Dalian University of Technology)

机构地区：[1]大连理工大学物理学院

出　　处：《仪表技术与传感器》2025年第2期6-10,33,共6页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(62275038);中央高校基本科研业务费专项资金项目(DUT23YG123,DUT22YG124)。

摘　　要：氨气是广泛应用于工业的气体,为防止其危害,研究以聚苯胺为敏感材料,充分利用其在不同pH值环境下电导率显著动态调谐的特性,并结合倾斜光纤光栅技术,成功制备了一种高灵敏度的氨气传感器。在氨气体积分数为25~500 ppm的环境中测试,传感器的透射光谱共振峰强度值呈现出连续的响应变化。在聚苯胺薄膜厚度为156 nm的条件下,传感器的响应与氨气浓度成线性关系,表现出良好的线性度(R^(2)=0.987 6)和高灵敏度(5.2×10^(-3) dB/ppm)。此外,传感器能在特定体积分数下表现出快速响应和稳定性,适用于长时间监测封闭环境中的氨气浓度。Ammonia is widely used in industrial applications,to avoid its hazards,this study utilized polyaniline as a sensitive material,fully exploiting its dynamically tunable conductivity properties under different pH environments,and combined it with tilted fiber Bragg grating technology,a highly sensitive ammonia sensor was successfully developed.Tested in environments with ammonia fractions ranging from 25 ppm to 500 ppm,the sensor exhibited continuous changes in transmission spectrum resonance peak intensity.With a polyaniline film thickness of 156 nm,the sensors response showed a linear relationship with ammonia con-centration,demonstrating good linearity(R^(2)=0.9876)and high sensitivity(5.2×10^(-3) dB/ppm).Additionally,the sensor dem-onstrated rapid response and stability at specific concentrations,making it suitable for long-term monitoring of enclosed environmentsammonia concentrations.

关 键 词：光纤光栅传感器 倾斜光纤光栅 聚苯胺 PH值 氨气传感器 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]