光学精密工程2018，Vol.26Issue(12)：2909-2916,8.DOI:10.3788/OPE.20182612.2909
主动遥感探测海底可燃冰的正演研究
Forward measurement of submarine gas hydrates by active remote sensing technology
摘要
Abstract
In this paper, an optical imaging interferometry system was proposed for the accurate detection of the temperature, pressure, and concentration of gas hydrates.As part of this system, laser light with a wavelength of 1.65μm, was transmitted across the sea surface through a fiber to excite gas hydrates on the sea bed.Ten spectral lines close to the 1.65μm waves emitted by CH4 were collected and transmitted to the sea surface through another fiber.Five image interference fringes for CH4 were obtained on a Charge-Coupled Device (CCD) camera.Using the "rotation line temperature measurement method" and the Lorentzian line profile, and by selecting the gray values of two adjacent interference fringes, the temperature, pressure, and concentration of the CH4 gas hydrates on the sea bed could be obtained.The forward results of the imaging interferogram for CH4 show that the elec-tron count on the CCD is 1.68×105, much larger than which results in the noise value of 400 e.The maximum signal-to-noise ratio of the system is 291.The narrowband interference filter could distinguish 10 spectral lines in the waves emitted by CH4 within the 16°field of view.The measuring precision of the CH4 temperature and concentration values are 1 Kand 3％, respectively.This study shows that an imaging interference system can be used in the remote sensing of seabed gas hydrates.关键词
光学遥感/可燃冰/温度/浓度/压强Key words
optical remote sensing/gas hydrate/temperature/concentration/pressure分类
信息技术与安全科学引用本文复制引用
唐远河,王浩轩,刘青松,李存霞,于涛..主动遥感探测海底可燃冰的正演研究[J].光学精密工程,2018,26(12):2909-2916,8.基金项目
国家自然科学基金资助项目(No.611675165) （No.611675165）
中科院西安光机所开放基金资助项目(No.LSIT201714D) （No.LSIT201714D）
西安理工大学特色项目资助课题(No.2015TS012) （No.2015TS012）
