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
      Computer Hardware
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE