|  |
| Title:
|
A.c. magnetic-field measurements using the fluxgate |
| Type:
|
Journal articleJournal article |
| Participant(s):
|
Forfatter:
Ripka, Pavel
Czech Tech. Univ., Dep. of Measurement
Technical University of Denmark
Email:
Technical University of Denmark
Technical University of Denmark
Email:
Forfatter:
Ranta, Aarne
Sodankylä Geophysical Observatory
|
| Abstract:
|
Fluxgate sensors are mostly used in closed-loop d.c. magnetometer
systems; they can also measure alternating fields up to
severalkilohertz, either in open-loop mode or from an error signal
in the slow-feedback loop as in the Thunderstorm rocket
magnetometer, which has 0.1 nT resolution up to 3 kHz. The
alternative is to use the direct induction effect in the pick-up
or feedback coil. While the low L/R constant of thepick-up coil
causes a high -3 dB frequency corner, the spherical feedback coil
has a narrow frequency characteristics and low noise up to 10 kHz
when used as a search coil. The noise level achieved is 56 pT
r.m.s. from 123 Hz to 10 kHz. |
| Published:
|
in journal: Sensors and Actuators A: Physical (ISSN: 0924-4247), vol: 46-47, pages: 307-311, 1995 |
|
|