JPS6469979A - Magnetism detecting apparatus - Google Patents
Magnetism detecting apparatusInfo
- Publication number
- JPS6469979A JPS6469979A JP62227473A JP22747387A JPS6469979A JP S6469979 A JPS6469979 A JP S6469979A JP 62227473 A JP62227473 A JP 62227473A JP 22747387 A JP22747387 A JP 22747387A JP S6469979 A JPS6469979 A JP S6469979A
- Authority
- JP
- Japan
- Prior art keywords
- detector
- axis
- coils
- axes
- inputted
- 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
Abstract
PURPOSE:To make it possible to properly remove geomagnetic noises at all times, by arranging the compensation volume to be automatically variable in accordance with the directional shift or displacement of two axes among the three of a detecting apparatus even when the direction of the two axes is not determined. CONSTITUTION:A magnetism detector 1 for use in measurement has detecting coils SCX-SCZ for X-Z axes and their compensating coils CCX-CCZ. For example, the detector 1 has its Z axis set to be vertical. Another magnetism detector 2 for use in compensation has signal detecting coils SCX-SCZ for X- axes which detector is set, for example, with its Z axis, to be vertical. A controller 5 calculates displaced or shifted angles from a predetermined position of each of the coils SCX and SCY based on respective outputs. An output from the detector 2 is amplified by an amplifier 4. Thereafter, a Z axis output Zn is inputted from the amplifier 4 directly to the Z axis compensating coil CCZ of the detector 1, while an amplified X axis output Xn and an amplified Y axis output Yn are inputted to D/A converters 6 and 8, and 7 and 9, respectively. Each of the outputs Xn and Yn is multiplied with a coefficient component inputted from the controller 5 in the D/A converters 6-9, and then added in adders 10 and 11 to be inputted to the compensating coils CCX and CCY, respectively. Thus, it becomes possible always to remove the geomagnetism noises properly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62227473A JP2570766B2 (en) | 1987-09-10 | 1987-09-10 | Magnetic detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62227473A JP2570766B2 (en) | 1987-09-10 | 1987-09-10 | Magnetic detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6469979A true JPS6469979A (en) | 1989-03-15 |
| JP2570766B2 JP2570766B2 (en) | 1997-01-16 |
Family
ID=16861432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62227473A Expired - Fee Related JP2570766B2 (en) | 1987-09-10 | 1987-09-10 | Magnetic detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2570766B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105589048A (en) * | 2014-11-12 | 2016-05-18 | 精工爱普生株式会社 | Magnetic field measurement method and magnetic field measurement device |
-
1987
- 1987-09-10 JP JP62227473A patent/JP2570766B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105589048A (en) * | 2014-11-12 | 2016-05-18 | 精工爱普生株式会社 | Magnetic field measurement method and magnetic field measurement device |
| CN105589048B (en) * | 2014-11-12 | 2020-10-30 | 精工爱普生株式会社 | Magnetic field measuring method and magnetic field measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2570766B2 (en) | 1997-01-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |