Accession Number:

ADD013553

Title:

Digital Compass Having a Ratiometric Bearing Processor.

Descriptive Note:

Patent, Filed 10 May 82, patented 1 Nov 83,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1983-11-01

Pagination or Media Count:

21.0

Abstract:

A digital compass is including a two-axis earths magnetic field sensor and a bearing processor computes the bearing for local display or transmission from a remote site to a local site for display andor storage. The bearing processor portion of the digital compass includes an analog-to-digital converter configured for ratiometric measurements to compute the ratio of the x-axis and y-axis signals smaller divided by the larger from the aforementioned two-axis earths magnetic field sensor. A programmable memory unit controlled, inter alia, by the data line outputs of the analog -to-digital converter, contains the arc tangent function for angles from 0 to 90 degrees. The data line outputs from the memory unit defines a quadrant displacement angle in the range of 0 to 90 degrees which is subsequently added to the cardinal point forming the lower boundary in bearing of the host quadrant.

Subject Categories:

  • Target Direction, Range and Position Finding
  • Electrical and Electronic Equipment
  • Computer Hardware
  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE