JPS55136972A - Ac bias type double frequency magnetic sensor - Google Patents
Ac bias type double frequency magnetic sensorInfo
- Publication number
- JPS55136972A JPS55136972A JP4481279A JP4481279A JPS55136972A JP S55136972 A JPS55136972 A JP S55136972A JP 4481279 A JP4481279 A JP 4481279A JP 4481279 A JP4481279 A JP 4481279A JP S55136972 A JPS55136972 A JP S55136972A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- magnetic sensor
- frequency magnetic
- type double
- double frequency
- 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
Landscapes
- Measuring Magnetic Variables (AREA)
Abstract
PURPOSE: To improve sensor sensitivity by applying an AC magnetic field in the direction of measurement as a bias.
CONSTITUTION: External magnetic field Hx is applied in the axial direction of magnetic body 1, and while magnetic body 1 is driven, the magnitude and direction of magnetic field Hx are varied. Then, AC voltage V2f of frequency twice as high as frequency f of AC voltage e1 of drive power source 2 is obtained at the output of winding 3. Then, winding 5 is driven by power source 4, and bias magnetic field ±HB is produced in the axial direction. When this magnetic field ±HB is applied at the time of sensing, it is possible to operate sensing at the highest sensitivity, and to obtain DC components from which AC components are removed at terminals 11, 12.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4481279A JPS55136972A (en) | 1979-04-12 | 1979-04-12 | Ac bias type double frequency magnetic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4481279A JPS55136972A (en) | 1979-04-12 | 1979-04-12 | Ac bias type double frequency magnetic sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55136972A true JPS55136972A (en) | 1980-10-25 |
Family
ID=12701834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4481279A Pending JPS55136972A (en) | 1979-04-12 | 1979-04-12 | Ac bias type double frequency magnetic sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55136972A (en) |
-
1979
- 1979-04-12 JP JP4481279A patent/JPS55136972A/en active Pending
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