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Recently, the needs of underwater robot used for many kinds of underwater work become higher and higher. In order to control the motion of underwater robot automatically, it is an indispensable to measure its position correctly in real time. Conventional systems are based on time difference or phase lag. However, they must use expensive components, such as transponders or atomic clock, and its system...
Nowadays, the need for underwater robots to be used for research in the fields of ocean has becomes ever greater. For autonomous underwater robots, an accurate positioning system is very important in order to develop their full potential. Many positioning systems in water have being advanced dramatically and used in some areas. These systems almost based on time difference and phase lag, so they must...
To provide highly precise position information for the navigation of an autonomous underwater vehicle (AUV) in a large area, we are developing a new underwater positioning system based on sensor networks. In this system, we set many standard stations on the sea surface and use a sound global positioning system (GPS). To lower the cost of nodes and simplify signal processing, we have proposed a new...
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