JPS5776411A - Method and apparatus for correcting output of azimuth detector - Google Patents
Method and apparatus for correcting output of azimuth detectorInfo
- Publication number
- JPS5776411A JPS5776411A JP15275180A JP15275180A JPS5776411A JP S5776411 A JPS5776411 A JP S5776411A JP 15275180 A JP15275180 A JP 15275180A JP 15275180 A JP15275180 A JP 15275180A JP S5776411 A JPS5776411 A JP S5776411A
- Authority
- JP
- Japan
- Prior art keywords
- detector
- output
- azimuth
- corrected
- crossing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
- G01C17/02—Magnetic compasses
- G01C17/28—Electromagnetic compasses
- G01C17/30—Earth-inductor compasses
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Navigation (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
PURPOSE:To find accurate azimuth by finding maximum and minimum detection values obtained by horizontally rotating two terrestrial magnetisum detectors crossing at right angles to each other on the same surface to operate corrected outputs. CONSTITUTION:an azimuth detector 10 built in one of two terrestrial magnetism detectors crossing at right angles to each other on the same surface is rotated horizontally at least once and the output from the detector 10 is applied to a maximum/ minimum output detector 11 and an arithmetic device 12. The output detector 11 finds the maximum value Xmax and the minimum value Xmin during the period commanded by a control device 13 and stores these values in a storage device 14. The arithmetic device 12 executes X'=2AX/(Xmax-Xmin) (where, A is standard gain) by inputting the output X of the azimuth detector 10 to find a corrected output X'. The control device 13 controls the operation of each device and updates data in every specifed period. In the other terrestrial magnetisum detector crossing at right angles with the former detector, corrected output Y'=2AY/(Ymax-Ymin) is found in the same manner. Thus, the influences of magnetic substances arranged cloely are erased, obtaining accurate azimuth from these corrected outputs X' and Y'.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15275180A JPS5776411A (en) | 1980-10-29 | 1980-10-29 | Method and apparatus for correcting output of azimuth detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15275180A JPS5776411A (en) | 1980-10-29 | 1980-10-29 | Method and apparatus for correcting output of azimuth detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5776411A true JPS5776411A (en) | 1982-05-13 |
JPS6230569B2 JPS6230569B2 (en) | 1987-07-03 |
Family
ID=15547361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15275180A Granted JPS5776411A (en) | 1980-10-29 | 1980-10-29 | Method and apparatus for correcting output of azimuth detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5776411A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5917811U (en) * | 1982-07-23 | 1984-02-03 | アルプス電気株式会社 | Magnetic direction detection device |
JPS5985910A (en) * | 1982-11-09 | 1984-05-18 | Nippon Telegr & Teleph Corp <Ntt> | Magnetic field vector detecting system |
JPS59125082A (en) * | 1982-12-29 | 1984-07-19 | Alps Electric Co Ltd | Magnetic azimuth detecting device |
US4616424A (en) * | 1984-09-13 | 1986-10-14 | Hitachi Metals, Ltd. | Magnetic direction sensor |
US4698912A (en) * | 1985-12-11 | 1987-10-13 | The Laitram Corporation | Magnetic compass calibration |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6035851U (en) * | 1983-08-19 | 1985-03-12 | 旭フアイバ−グラス株式会社 | Indoor assembled soundproof room |
-
1980
- 1980-10-29 JP JP15275180A patent/JPS5776411A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6035851U (en) * | 1983-08-19 | 1985-03-12 | 旭フアイバ−グラス株式会社 | Indoor assembled soundproof room |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5917811U (en) * | 1982-07-23 | 1984-02-03 | アルプス電気株式会社 | Magnetic direction detection device |
JPS5985910A (en) * | 1982-11-09 | 1984-05-18 | Nippon Telegr & Teleph Corp <Ntt> | Magnetic field vector detecting system |
JPH04201B2 (en) * | 1982-11-09 | 1992-01-06 | Nippon Denshin Denwa Kk | |
JPS59125082A (en) * | 1982-12-29 | 1984-07-19 | Alps Electric Co Ltd | Magnetic azimuth detecting device |
JPH0327843B2 (en) * | 1982-12-29 | 1991-04-17 | Alps Electric Co Ltd | |
US4616424A (en) * | 1984-09-13 | 1986-10-14 | Hitachi Metals, Ltd. | Magnetic direction sensor |
US4698912A (en) * | 1985-12-11 | 1987-10-13 | The Laitram Corporation | Magnetic compass calibration |
Also Published As
Publication number | Publication date |
---|---|
JPS6230569B2 (en) | 1987-07-03 |
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