In a message dated 09/11/2007, kpayea@.............. writes:

One person's problem is another's data.  Instead of  trying to constrain the 
movement to one direction, try to figure out a way to  measure the 
displacement direction as well as amplitude.  Then one could  detect earthquakes from any 
direction and know something about the direction  the waves were travelling.



Hi Keith,
 
    How about putting four magnets on the bottom of the  bob and using figure 
of 8 coils? Alternatively one central magnet and four  coils overlapping the 
edges? 
 
    Regards,
 
    Chris Chapman



   






In a message dated 09/11/2007, kpayea@.............. writes:
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One person's problem is another's data.  Ins=
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  trying to constrain the movement to one direction, try to figure out a way=
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  measure the displacement direction as well as amplitude.  Then one co=
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  detect earthquakes from any direction and know something about the directi=
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  the waves were travelling.

Hi Keith,
 
    How about putting four magnets on the bottom of=
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bob and using figure of 8 coils? Alternatively one central magnet and f=
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coils overlapping the edges? 
 
    Regards,
 
    Chris Chapman