期刊
IEEE ACCESS
卷 7, 期 -, 页码 17975-17980出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2019.2894341
关键词
Underwater high-frequency acoustics; range-averaged temperature; real-time monitoring
资金
- Xiamen Institute of Science and Technology
- National Key Research and Development Program of China [2016YFC0502901, 2018YFC1407504]
- National Science Foundation of China [41676023, 41276040, 41422604, 11174240]
- Natural Science Foundation of Fujian Province of China [2012J06010]
Temperature has a great impact on the underwater environment in oceans. The real-time monitoring of it is of both scientific and practical importance. In this paper, we proposed a new scheme of high-frequency acoustic thermometry to measure the real-time ranged-averaged underwater temperature. The cross-correlation analysis with high-resolution Global Positioning System synchronization was used to derive the propagation time of underwater acoustic signals. Reciprocal underwater acoustic transmissions between two acoustic stations extracted the range-averaged temperature. Furthermore, a field experiment of high-frequency acoustic transmission was performed in the Jiulong River estuary. The ranged-average temperature extracted by the underwater acoustic sensor was compared with in situ temperature with a relative standard deviation of about 6%. The range-averaged temperature was correlated with in situ temperature (R-2 = 0.93) during 48-hour real-time measurement experiments. The results suggest the potential applications of proposed high-frequency acoustic thermometry in real-time monitoring of the averaged temperature in coastal oceans.
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