LNG 수송선과 육상 터미널간 옥외 광 무선통신 시스템에 관한 연구

Abstract

Ship shore link communication system(SSL) is one of mandatory systems in LNG carrier. SSL is a communication system for ship to shore, ship to ship and shore to ship links. The SSL transmits critical information and non-critical information. Critical information is emergency shutdown (ESD) signal for ship to shore or shore to ship links. Non-critical information is hot phone, PABX phone, public phone and mooring load monitoring data. SSL has different link type. One is electric link (pyle national, miyaki) and the other one is fibre optic link. Both types are using physical connection. SSL is operated at hazardous areas, therefore, the operators must be handled with great care. LED wireless communication has no electromagnetic wave and does not necessary any physical connector and electric cables. If LED system can block sunlight and interference light, It would be a suitable communication system in hazardous areas. In case of LNG terminal, It does not allow wireless communications to prevent any explosive accident caused by electromagnet waves. For this reason, the SSL system is still using wired connection. In this paper, LED wireless communication technology at outdoor conditions is presented to apply SSL system to reduce operating problem and human resources.