JPS57512A - Declinometer system - Google Patents
Declinometer systemInfo
- Publication number
- JPS57512A JPS57512A JP7509680A JP7509680A JPS57512A JP S57512 A JPS57512 A JP S57512A JP 7509680 A JP7509680 A JP 7509680A JP 7509680 A JP7509680 A JP 7509680A JP S57512 A JPS57512 A JP S57512A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- angle
- terrestrial magnetism
- detected
- phase difference
- 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.)
- Pending
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)
- Measuring Magnetic Variables (AREA)
Abstract
PURPOSE:To point out certainly the direction by substituting the really measured function from a plurality of data collected to an approximate curve to correct it in a case where a value of a detected angle with terrestrial magnetism and a true angle provide a unique function. CONSTITUTION:A coil 2, slip rings 3, 4 a rotating shutter 7 are fixed to a rotation axis 1. The rotation axis 1 rotates around a vertical axis, an AC electromotive force is then generated to the coil 2 with a horizontal component of terrestrial magnetism and it is taken out by the slip rings 3, 4 and brushes 5, 6. On the other hand, the rotating shutter 7 intermits an optical path of two sets of photoelectric shutters consisting of light emitting diodes 8, 9 and light receiving elements 10, 11 to provide two rectangular synchronized signals. The AC electromotive force obtained from the coil 2 with terrestrial magnetism and the synchronized signals are applied to a phase difference detecting part and the phase difference among them are detected directly as an angle. Further a correction is applied to it by a linearizer and a true direction is detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7509680A JPS57512A (en) | 1980-06-03 | 1980-06-03 | Declinometer system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7509680A JPS57512A (en) | 1980-06-03 | 1980-06-03 | Declinometer system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57512A true JPS57512A (en) | 1982-01-05 |
Family
ID=13566289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7509680A Pending JPS57512A (en) | 1980-06-03 | 1980-06-03 | Declinometer system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57512A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63314409A (en) * | 1987-06-17 | 1988-12-22 | General Res Obu Erekutoronitsukusu:Kk | Error correcting system of direction finder |
| JPH0455506U (en) * | 1990-09-19 | 1992-05-13 |
-
1980
- 1980-06-03 JP JP7509680A patent/JPS57512A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63314409A (en) * | 1987-06-17 | 1988-12-22 | General Res Obu Erekutoronitsukusu:Kk | Error correcting system of direction finder |
| JPH0455506U (en) * | 1990-09-19 | 1992-05-13 |
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