Measurement of shaft-rate modulated electric fields of a ship in a shallow sea

Bin Shen; Shen-guang Gong; Xin-qin Chen; Fan Zhang

doi:10.1117/12.810595

12 January 2009 Measurement of shaft-rate modulated electric fields of a ship in a shallow sea

Bin Shen, Shen-guang Gong, Xin-qin Chen, Fan Zhang

Proceedings Volume 7133, Fifth International Symposium on Instrumentation Science and Technology; 71332H (2009) https://doi.org/10.1117/12.810595
Event: International Symposium on Instrumentation Science and Technology, 2008, Shenyang, China

Abstract

As an intrinsic characteristic, the shaft-rate modulated electric field of a ship is an important signal source in underwater domain. A measurement system is designed to measure the shaft-rate modulated electric field of a ship. Taking into consideration the pressure bearing, watertightness and other problems, the system is made up of sensors, signal condition circuits, and data acquisition and processing system. After the measurement system is sunk down to the seabed, it is difficult to regulate orientation, attitude and other sensor parameters. It is also hard to control the environment around the system. Therefore, the status information of the seabed is recorded for posterior calibration. Frequency analysis and time-frequency analysis methods are used for signal processing. Experiment results show that the spatial distribution of shaft-rate modulated electric field has a significant regional property and apparent traffic characteristic.

Citation Download Citation

Bin Shen, Shen-guang Gong, Xin-qin Chen, and Fan Zhang "Measurement of shaft-rate modulated electric fields of a ship in a shallow sea", Proc. SPIE 7133, Fifth International Symposium on Instrumentation Science and Technology, 71332H (12 January 2009); https://doi.org/10.1117/12.810595

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