The Remote Communication Control Of In-situ Laser Raman Spectroscopy System Based On Seafloor Observation Network

The strategic position of seafloor has been more and more significant in theworld, because seafloor contains abundant mineral resources, natural gas hydrateresources and oil and gas resources. As the development of technology and theincrease of social demand, China is going to build a long-term seafloor observationnetwork system in the12th Five-Year plan. The mission of the seafloor observationnetwork is constructing power transmission lines and submarine fiber-optic cable onthe seafloor to connect submarine scientific observation instruments near thesubmarine observation point and the shore station monitoring center, and themonitoring center could get observation data which is acquiring from submarinescientific observation instruments real-time online. As one of the submarine scientificobservation instruments, Raman spectroscopy system can detect multiple anions inwater non-destructively. In this paper, the remote communication control of in-situlaser Raman spectroscopy system based on seafloor observation network is researched,and the system consists of three parts including the shore station monitoring center,the main transmission network system and the laser Raman spectroscopy system. Thispaper is consisting of the following contents:1.The overall design of the in-situ laser Raman spectroscopy system based on theseafloor observation network: According to the overall structure of the seafloorobservation network, the seafloor observation network structure which suits theRaman spectroscopy system is designed. It consists of three parts: the shore stationmonitoring center, the main transmission network system and the laser Ramanspectroscopy system. The topology, the communication mode and the connection ofthe seafloor observation network is introduced in detail. The topology structure of thelaser Raman spectroscopy is illustrated briefly: Raman control cabin controls twoRaman detection cabins to detect two kinds of spectroscopy.2.The hardware structure and the software design of the main transmissionnetwork system: The main transmission network connects the shore stationmonitoring center and the Raman control cabin, therefore the reliable hardware of theshore station monitoring center and the Raman control cabin is introduced in detail.The main network uses TCP/IP protocol. The TCP/IP hierarchical structure andprotocol based on seafloor observation network are illustrated in detail. Theapplication layer protocol of seafloor observation network is designed. According tothe designed application layer, the software design is programmed by Visual C++andTCP/IP communication program uses MFC socket library which Microsoft supports.At the same time, in order to detect and report all kinds of mistakes during IP packetdelivery, an Echo and Echo Reply software based on ICMP is designed.3.The design and research of the laser Raman spectroscopy system: The laserRaman spectroscopy system is one of scientific observation instruments linking to the seafloor observation netwrk. It could receive and analyse the orders which the shorestation monitoring center sends. According to the analysed orders, it could acquireRaman spectroscopy, store data and send it to the shore station monitoring center. Thehardware structure of the Raman detection cabin is introduced in detail. Modbusprotocol which is the communication protocol between Raman control cabin andRaman detection cabin is illustrated in detail. And the communication protocol basedon Modbus is designed. According to the protocol, software design is programmed byVisual C++and and serial port communication program uses MSComm widget thatMicrosoft porvides.4.Software test: It consists of two parts: the main transmission network softwaretest and Raman spectroscopy acquiring software test. The main transmission networktest: PC connects PC104via a router to form a LAN, and PC104connects a STM32data acquisition board. PC could control PC104to acquire data from data acquisitionboard via RS232, and receive, show and store the acquired data. Using Echo and EchoReply software to check the accessibility to the hosts on the network. Ramanspectroscopy acquiring software test: PC connects PC104via RS485, and PC104connects QE65000. PC could control PC104to acquire spectroscopy, and receive,show and store the data.