Title:
【発明の名称】電子磁気コンパス
Document Type and Number:
Japanese Patent JP2680150
Kind Code:
B2
Abstract:
Disclosed is an electronic magnetic compass which is to be mounted on a small ship and which is reduced in cost and improved in performance. The electronic magnetic compass is provided with an angle sensor interlocked with a compass card so as to produce a code signal at every predetermined angle, a code converter for converting the code signal into a compass indication angle, and a signal conversion circuit for producing a deviation signal indicating a deviation between an azimuth angle signal and an indication angle signal. The compass azimuth measurement is performed with a simple configuration of an open loop system, so that the structure of an encoder for the angle sensor is so simple that the cost can be reduced so much. The azimuth angle signal and the indication angle signal can be automatically calibrated so that the measurement accuracy can be improved.
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Inventors:
Nomura Goro
Masami Tanaka
Yusaku Satsukawa
Kenji Yamada
Kenji Kogure
Masami Tanaka
Yusaku Satsukawa
Kenji Yamada
Kenji Kogure
Application Number:
JP33978689A
Publication Date:
November 19, 1997
Filing Date:
December 27, 1989
Export Citation:
Assignee:
Tokimec Co., Ltd.
International Classes:
G01C17/38; G01C17/30; G01C17/36; (IPC1-7): G01C17/36; G01C17/38
Domestic Patent References:
| JP5752813A | ||||
| JP4848154A | ||||
| JP5267665A | ||||
| JP5371854A | ||||
| JP55145316U | ||||
| JP3711192Y1 | ||||
| JP5429906B2 | ||||
| JP5429905B2 | ||||
| JP584286B2 | ||||
| JP5534882B2 |
Attorney, Agent or Firm:
Ishido