南京大学学报(自然科学版) ›› 2018, Vol. 54 ›› Issue (6): 10751084.doi: 10.13232/j.cnki.jnju.2018.06.003
段新春1,施 斌1*,孙梦雅1,魏广庆2,顾 凯1,冯晨曦1
Duan Xinchun1,Shi Bin1*,Sun Mengya1,Wei Guangqing2,Gu Kai1,Feng Chenxi1
摘要: 随着工农业生产等领域对湿度的准确、实时监测要求越来越高,进一步创新湿度监测技术具有重要的实际意义. 基于干湿球湿度测量原理与光纤布拉格光栅(Fiber Bragg Grating,FBG)感温原理,提出了一种新型的FBG蒸发式湿度计,通过试验率定,研究了其在不同纱布套厚度下的感湿性能. 结果表明:FBG蒸发式湿度计在包有两层纱布套的情况下感湿性能最稳定,干湿球系数A平均值达到0.001116. 随后通过试验验证了其用于环境湿度监测的可行性. 开展了FBG蒸发式湿度计在不同湿度差下的阶跃响应试验研究,结果表明:FBG蒸发式湿度计具有良好的响应特性,在湿度差为20%RH~60%RH下,响应时间为26~50 s. FBG蒸发式湿度计的响应特性在其本质上不受所处环境湿度值的影响,在高湿环境下稳定性高. FBG蒸发式湿度计具有抗电磁干扰、精度高、误差小、响应时间短、高湿环境下性能稳定等突出优点,为现代化的湿度测量提供了一种新的手段.
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