Multi-parameter measurements using optical fibre long period gratings for indoor air quality monitoring
Multi-parameter measurements using optical fibre long period gratings for indoor air quality monitoring
复制标题
DOI：
10.1016/j.snb.2016.12.050
复制
发表时间：
2017-06-01
影响因子：
8.4
通讯作者：
Tatam, Ralph P.
中科院分区：
文献类型：
--
作者：
Hromadka, Jiri;Korposh, Sergiy;Tatam, Ralph P.
采用单根光纤制作的三个长周期光栅阵列，在波长域复用，用于同时测量室内空气质量（IAQ）的关键指标温度、相对湿度（RH）和挥发性有机化合物（VOCs）。每个LPG传感器都针对特定测量进行了优化设计。第一个，没有表面修饰，用来测量温度。第二种是介孔二氧化硅纳米颗粒（SiO2 NPs）涂层，用于测量RH；第三种是SiO2 NPs涂层，注入功能材料对磺胺酸杯[8]芳烃（CA[8]），用于监测VOC浓度。这些液化石油气是用周期制造的，这样它们就可以在相位匹配的转折点或附近运行。传感器在实验室进行校准，并在实验室和办公室环境中同时测量关键的室内空气质量参数。实验成功地证明了LPG传感器阵列在实际条件下产生的数据是可靠的。与市售传感器的测量结果一致。光纤传感器与标准温度和湿度传感器测量值的平均差异分别大于0.5 C和5%。此外，光纤传感器在高浓度VOC检测方面的潜在应用已经得到证明。(C) 2017年作者。Elsevier B.V.出版
An array of three long period gratings (LPGs) fabricated in a single optical fibre and multiplexed in the wavelength domain was used to measure simultaneously temperature, relative humidity (RH) and volatile organic compounds (VOCs), which are key indoor air quality (IAQ) indicators. Each LPG sensor was designed with optimised response to a particular measurand. The first, with no surface modification, was used to measure temperature. The second, modified by a mesoporous coating of silica nanoparticles (SiO2 NPs), was used to measure RH and the third, modified with a coating of SiO2 NPs infused with a functional material, p-sulphanato calix[8]arene (CA[8]), was employed to monitor VOC concentration. The LPGs were fabricated with periods such that they operated at or near the phase matching turning point. The sensors were calibrated in the laboratory and the simultaneous measurement of the key indoor air quality parameters was undertaken in laboratory and office environments. It was demonstrated successfully that the data produced by the LPG sensor array under real conditions was.in a good agreement with that produced by commercially available sensors. The average differences between values obtained by the optical fibre sensor and standard temperature and RH sensors were better than 0.5 C and 5% respectively. Further, the potential application of fibre optic sensors for VOC detection at high concentrations has been demonstrated. (C) 2017 The Authors. Published by Elsevier B.V.