DRIFTING BUOY WITH POWER SAVING DEVICE AND TIDAL CURRENT OBSERVATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a tidal current observation system for inexpensively and simultaneously observing tidal currents in a wide range, and a drifting buoy which is compact and can be used for a long period of time.;SOLUTION: A power source controller for automatically turning on/off a power source is mounted on the drifting buoy, and time intervals of turning on/off an observation device mounted on the drifting buoy are properly controlled in consideration of a velocity of a tidal current to be observed and a measurement accuracy necessary for observation, whereby the power consumption is reduced. GPS information of the drifting buoy is transmitted via the Internet by using a mobile phone network, and tidal current information is calculated by the observation system connected to the Internet. The mobile phone network is used to observe the tidal current in a wide range. With respect to tidal current observation data obtained from a plurality of drifting buoys, observation information is distributed through web servers. Since long-time observation is possible by power saving while a power source device like a battery is reduced in size, drifting buoys can be made compact and inexpensive. This invention is available for not only tidal current observation but also water current observation in rivers, lakes, etc.;COPYRIGHT: (C)2008,JPO&INPIT