Accession Number : ADD016168

Title :   Underwater IR Communication System.

Descriptive Note : Patent, Filed 5 May 92, patented 30 Nov 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Stewart, Ian H ; Miller, James G ; Kruchowy, Roman

Report Date : 30 Nov 1993

Pagination or Media Count : 9

Abstract : An underwater communications system comprising first and second communications modules which transmit and receive data utilizing infrared radiation. Each module has a transmitter/receiver which converts each received data byte to RS-232 formatted data for transmission to a computer. Each communication module also includes a timer for providing a forty kilohertz pulsed signal to modulation circuitry which passes the pulsed signal through the modulation circuitry when a logic zero is supplied to the modulation circuitry and which inhibits the pulsed signal when a logic one is supplied to the circuitry. That portion of the pulsed signal which passes through the modulation circuitry is provided to a light emitting diode which transmits a pulsed burst of infrared radiation to an infrared light detecting unit within the second communications module.

Descriptors :   *INFRARED RADIATION, *UNDERWATER COMMUNICATIONS, *PATENTS, COMPUTERS, LIGHT EMITTING DIODES, LOGIC, MODULATION, RADIATION, RECEIVERS, RUPTURE, SIGNALS, TRANSMITTER RECEIVERS, TRANSMITTERS

Subject Categories : Command, Control and Communications Systems
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE