Electron-Beam Analog Computer for Determining Coordinates of a Seafloor Point.
DEPARTMENT OF THE NAVY WASHINGTON D C
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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.
- Physical and Dynamic Oceanography
- Computer Hardware
- Acoustic Detection and Detectors