基于自持式剖面浮标的目标电场探测方法研究

Underwater Electric Field Detection Method Based on Autonomous Profiling Drifter

提出了基于自持式剖面浮标的目标电场探测方法.对探测的基本原理和应用背景进行介绍,然后利用海试数据,对探测浮标在不同水深下的姿态和电场噪声进行分析.当浮标悬浮于50 m水深时,浮标晃动幅度较大(俯仰角最大约7°)且测得的电场存在明显的海浪谱特性.当浮标在100-200 m水深范围内缓慢下降时,浮标晃动幅度明显降低(俯仰角低于0.5°),方位角基本不随时间变化;在该水深区间,频率为0.5-30 Hz的环境电场噪声峰值约为0.08~0.15μV/m,明显较浅水深时低.综合浮标晃动姿态、环境电场噪声等信息,认为探测装置应该工作在100-200 m范围内.

An underwater electric field detection method based on autonomous profiling drifter is proposed.Basic principle and application background of the electric field detection method are introduced,and related sea trial is carried out.The results show that when the drifter is suspended at a depth of 50 m,the drifter has large shaking amplitude(the maximum pitch angle is about 7°),and the measured electric field has typical characteristics of the wave spectrum.When the drifter is in the range of 100~200 min depth,the shaking amplitude of the drifter is greatly reduced(the pitch angle is lower than 0.5°),while the azimuth angle is basically unchanged with time.At this range of depth,the peak-peak value of environmental electric field noise is 0.08〜0.15μv/m in the frequency range of 0.5〜30 Hz,which is significantly lower than that in the shallower depth.It is considered that the underwater electric field detection device should work in the range of 100〜200 m in depth.