Accession Number : ADD002139
Title : Electron-Beam Analog Computer for Determining Coordinates of a Seafloor Point.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C
Personal Author(s) : Hitchcock,Robert D
Report Date : 08 Oct 1974
Pagination or Media Count : 7
Abstract : The patent relates to a device for determining coordinates of a seafloor point by acoustic triangulation which provides a real-time plan position indication read-out of the coordinates of a seafloor target, scanned by a pair of rotating, pulsed, side-looking sonar transducers, which are displaced from each other along a common vertical axis. The device utilizes an electron-beam method to compute, by analog triangulation, the cylindrical coordinates of a target relative to the axis of the rotating transducer pair. The system is comprised of a sonar transceiver, a dual gun cathode ray tube, and a vidicon tube which provides an output directly to a plan position indicator (PPI) display (i.e., without digital-to-analog conversion). The input signals to this analog computer are two voltage pulses, each pulse being displaced in time from a given reference pulse. These voltage pulses are two independently measured echo ranges from the two transducers to a target.
Descriptors : *Ocean bottom, *Plan position indicators, *Patents, Analog computers, Sonar equipment, Triangulation, Electron beams, Echo ranging
Subject Categories : Physical and Dynamic Oceanography
Acoustic Detection and Detectors
Distribution Statement : APPROVED FOR PUBLIC RELEASE