ディジタル指示磁気コンパスの試作と性能に関する研究

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  • Study on the Design and Performance of a Digital Magnetic Compass for Marine Use
  • ディジタル シジ ジキ コンパス ノ シサク ト セイノウ ニカンスルケンキュ

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This paper described about the design and performance of a digital magnetic compass sensor which is fitted on a commercial magnetic compass bowl. The digital magnetic compass sensor is a dry card slave compass having double pivots and an eddy current damper. A gray code pattern, printed on the dry card, passes the light ray from small lamps just fitted above the card, and nine CdS receivers offer the gray code singnal to a ROM which converts the gray code address to a seven-segment-course-indicator. The slave digital compass indications, following the master compass were measured by simulation that solved two non-linear differential equations simultaneously by using Runge-Kutta-Nystom's method. And the experimantal results showed that the values during the damping movement of the digital compass were in good coincidence with those of the simulation. These results would also provide a digital signal of ship's course to NNSS system for its interpolation calculation of position on the ships without the gyro compass.

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