海底观测网水下环境实时监控系统设计与实现

Design and realization of underwater environment real-time monitoring system for ocean observatory network

为了对深海水下环境进行实时监控,设计并实现可靠性高、操作性强、实时性好的海底观测试验网络水下环境实时监控系统.基于理论计算和稳定性校核,设计耐压腔体机械结构.通过建立耐压腔内散热模型,并利用ANSYS软件仿真和传感器实测的方法,得到腔内温度场分布.提出一种机械接触器和功率电阻并联使用的浪涌电流抑制方法,实现浪涌电流的有效抑制和系统的可靠启动.采用网络时间协议(NTP)和精确时间协议(PTP)获得高精度时间同步,2种协议中的时间报文都是在岸基站时间服务器和水下系统之间相互交互,可获得亚微秒级别精度的授时服务.基于VC++开发的上位机软件能够实现实时监测和控制水下系统.在实验室环境下开展了系统各个部分的功能性验证试验,并进行南海海试布放.结果表明,开发的系统有效、可靠且适合于深海连续运行.

An underwater environment real-time monitoring system with high reliability,strong operability and good real-time performance for an experimental ocean observatory network was designed and realized in order to monitor the deep-sea underwater environment real-timely.The mechanical structure of pressure vessel was designed based on theoretical arithmetic and stability check.The distribution of the temperature field inside the cavity was obtained through building heat dissipation model and utilizing the approaches of ANSYS software simulation and sensor measure.A surge current suppression method with a mechanical contactor and a power resistor in parallel was proposed to realize effective surge current limitation and a reliable start-up.Network time protocol（NTP）and precision time protocol（PTP）were adopted to achieve high-precision time synchronization,in which time packets were exchanged between the time server on the shore station and the underwater system,and sub-microsecond precision time service could be obtained.Upper computer software based on VC＋＋ was developed to realize real-time controlling and monitoring the underwater system.The specific function verifications of all the sections of the system were conducted in the laboratory,and the system was deployed in the South China Sea in a sea trial.The results indicate that the developed system is effective,reliable,and suitable for deep sea continuous operation.