JPH0455506U

JPH0455506U -

Info

Publication number: JPH0455506U
Application number: JP9814490U
Authority: JP
Priority date: 1990-09-19
Filing date: 1990-09-19
Publication date: 1992-05-13

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示すブロツク図
、第２図は磁気コンパスの一実施例を示すブロツ
ク図、第３図は自差曲線の一例、第４図は船体永
久磁気による磁場の一例である。図において１は磁気コンパス、２は自差設定器
、５は自差係数演算器、７は自差演算器、８は減
算回路である。なお、各図中同一符号は同一また
は相当部分を示す。 Fig. 1 is a block diagram showing an embodiment of this invention, Fig. 2 is a block diagram showing an embodiment of a magnetic compass, Fig. 3 is an example of a deviation curve, and Fig. 4 is a diagram showing the magnetic field generated by the ship's permanent magnetism. This is an example. In the figure, 1 is a magnetic compass, 2 is a difference setting device, 5 is a difference coefficient calculator, 7 is a difference calculator, and 8 is a subtraction circuit. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of Claim for Utility Model Registration] In a direction error correction device for a magnetic compass that is installed on a ship and measures direction in response to the earth's magnetism, the deviation obtained by comparing the compass direction from the magnetic compass with the magnetic direction and its deviation. A deviation setting device that sets the polarity for each predetermined compass direction, a deviation coefficient calculator that calculates a predetermined deviation coefficient from the setting value of the deviation setting device, and a magnetic compass based on the deviation coefficient and the compass direction. 1. An azimuth error correcting device comprising: a deviation calculator for calculating the deviation of a magnetic compass;