http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이강훈(Kang-Hoon Lee),백명숙(Myeong-Sook Back),장남주(Jang-Nam Ju),이창의(Chang-Ui Lee),김미경(Mi-Kyung Kim),박철수(Chul-Soo Park),윤경환(Gyeong-Hwan Yoon) 제어로봇시스템학회 2010 제어로봇시스템학회 각 지부별 자료집 Vol.2010 No.12
Underwater acoustic communication is a technique of sending and receiving messages below water. Currently, several kinds of communication methods have been developed for terrestrial environments. Especially, Dramatic advances in system designs of RF(Radio Frequency) communication have made possible the use of wireless modems for a variety of new monitoring and control applications. But, underwater communication is difficult due to factors like multi-path propagation, time variations of the channel, small available bandwidth and strong signal attenuation. Because of those reasons, RF signal is not suitable for underwater usages. And so underwater communication systems should be constituted with acoustic modems. This study aims to develop underwater communication systems using commercial acoustic module for lightweight Autonomous Underwater Vehicles(AUV), robot fishes and buoy platforms and so on. The structure of this study is as follows. First, we analyze the characteristics of the implementing underwater environments where basic specifications are presented. And then, selection process of the commercial acoustic communication module is presented. Finally, this paper evaluates the characteristics of selected modules in the coastal waters.