Visible light communication method and visible light communication system
A visible light communication and beam technology, applied in optical transmission systems, transmission systems, short-range systems, etc., can solve problems such as short distances and inability to communicate emergency notifications to ships on the water
Inactive Publication Date: 2013-05-08
MARINE COMMS RYUKYU
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Problems solved by technology
At this time, there is a problem that even if the conventional visible light communication device for extremely short distances is used for
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A simple visible light communication method and system that, underwater in an ordinary water-quality in which a diver is allowed to go under the water, are able to reliably communicate with a ship, or the like, above water while the diver is stopping at a safety stop position at a depth of 5 m in order to prevent occurrence of dysbarism. The visible light communication method and system us the visible light communication system that includes a transmitter and a receiver and that is usable underwater, and include at a transmitting side, modulating information to be transmitted to pseudo-white light that is adjusted to have a color temperature of 4000 to 10000K and a luminous flux of 550 to 1500 lumens and that is emitted from an LED, and transmitting the pseudo-white light; and, at a receiving side, extracting the information by demodulating the received pseudo-white light.
Description
technical field [0001] The present invention relates to a visible light communication method and a visible light communication device for performing data communication from water to water, from water to water surface or from water surface to water. Background technique [0002] Conventionally, in order to communicate data (information) underwater, there is a method using visible light. In order to receive and transmit data in water, it is disclosed that the data to be transmitted is modulated into visible light on the transmitting side and then sent to the water; the visible light is received and demodulated on the receiving side, and the method and device for extracting information (for example, patent Document 1 to Patent Document 3). [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 4-312035 [0004] Patent Document 2: Japanese Patent Laid-Open No. 2005-20422 [0005] Patent Document 3: Japanese Patent Laid-Open No. 2008-304649 Contents of the inv...
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Login to view more IPC IPC(8): H04B10/11H04B10/50H04B10/60
CPCH04B10/00H04B10/80H04B13/02H04B10/116
Inventor 上间英树谱久原悠大城启义宜保智子
Owner MARINE COMMS RYUKYU
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