Research On Key Technology For Energy Monitoring And Management System Of Underwater Connection Box

The underwater junction box is a significant infrastructure of the submarine network system. In Seafloor observatory network, all kinds of equipment and sensors are connected to underwater junction box. The power is continuously transported through shore station to junction box by submarine cables. Power supply for the submarine observation network is long-term and continuous, so the ordinary battery power is only as a backup power, which cannot meet the requirements of energy supply. The real-time online remote monitoring on power supply system and the protection on switching energy and backup power are the keys for the long-term work of seafloor observation network. In order to improve the reliability and efficiency of the seafloor power system, the energy monitoring and management system is designed by carrying out key studies on design of monitoring power inside the connection box and on energy distribution and control.The construction situation of seafloor observatory network is summarized in the first chapter of this paper. The electric energy monitoring technology of existing seafloor observatory network is studied. The design thought, realization method of energy management system of underwater junction box are established. Through the analysis of the experimental results, a summary of the innovation and the insufficiency is proposed. A specific direction of the next step study is pointed out.In the second chapter, the authors analyzed the problems of energy transmission management, sensor mounting and data acquisition and transmission condition monitoring and early warning in a multi node seafloor observatory network. The study on the key technology of the underwater junction box energy monitoring and management system is carried out. The hardware and software module of energy monitoring and management system are designed, the performance index of the system is discussed, the realization scheme of the lower single chip computer and host computer function are determined, and the multi node connection box to form the effective work of the network is made.The hardware design of the MCU system and peripheral system module is presented in the third chapter. The MSP430F2481-based design is used for the lower machine hardware module. The 12-bit analog to digital converter (ADC 12) is adopted, which has a high accuracy and is convenient for data processing. In this chapter the specific implementation of each module is described briefly, including the selection and implementation of sensors, sample conversion of microcontroller, communication and data processing.The design and implementation of software system for the lower machine are described in chapter four. The sophisticated Visual C++is used to write the interactive operation interface for the lower software system, which is suitable for WinXP operating platform. The underwater data transmission and instruction exchange are completed by the photoelectric switch and underwater connection box. The collected data are backed up in the PC after processing. The PC can display, query and print the data at any time.The energy monitoring and management system of underwater connection box is tested in chapter five and the test results are analyzed. A summary of this paper is given in chapter six and the further study is prospected as well.