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Magnetometer to detect minute magnetic filed changes

G

Guest

Jan 1, 1970
0
How to detect (open to friendly speculations) minute magnetic field changes
?

In application such as;
* Detecting a crashed small aircraft in a very dense forest from another
small aircraft fliying at a hight of 1000-4000 feet AGL.
* Detecting metal pipe 10-20m below in ground.
* Detecting a small metal boat sinked to depth of 00-200m from the
surface of the sea.
* Detecting earth magnetic field variations from a low orbit atellite or
from a high altitude flying baloon.
 
C

Caliban

Jan 1, 1970
0
D.N. Scalbile said:
How to detect (open to friendly speculations) minute magnetic field changes
?

In application such as;
* Detecting a crashed small aircraft in a very dense forest from another
small aircraft fliying at a hight of 1000-4000 feet AGL.
* Detecting metal pipe 10-20m below in ground.
* Detecting a small metal boat sinked to depth of 00-200m from the
surface of the sea.
* Detecting earth magnetic field variations from a low orbit atellite or
from a high altitude flying baloon.

Scientific american diy magnetometer project:

http://www.sciam.com/article.cfm?articleID=000089B4-E29E-1C67-B882809EC588ED9F

follow-up:

http://www.sciam.com/article.cfm?articleID=000E5AE2-4AAE-1C75-9B81809EC588EF21

It won't be sensitive enough for your applications (or portable),
somewhere to start though.
 
A

Adrian Jansen

Jan 1, 1970
0
D.N. Scalbile said:
How to detect (open to friendly speculations) minute magnetic field changes
?

In application such as;
* Detecting a crashed small aircraft in a very dense forest from another
small aircraft fliying at a hight of 1000-4000 feet AGL.
* Detecting metal pipe 10-20m below in ground.
* Detecting a small metal boat sinked to depth of 00-200m from the
surface of the sea.
* Detecting earth magnetic field variations from a low orbit atellite or
from a high altitude flying baloon.
Do a search on "Proton magnetometer" for some ideas. There was an
article in a very old Scientific American ( ~1960 ) which gave some
details. Much more sensitive than the later force balance articles
already cited. None are very easy to implement.

--
Regards,

Adrian Jansen adrianjansen at internode dot on dot net
Design Engineer J & K Micro Systems
Microcomputer solutions for industrial control
Note reply address is invalid, convert address above to machine form.
 
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