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:

1974-10-08

Pagination or Media Count:

7.0

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