Hi Everyone,  I wanted to ask some questions about choosing a spring for =
a vertical spring sensor.

   Pictures three situations, three different springs being pulled =
straight down by a mass. No triangular modifications, just straight =
down.

1 One is a strong spring like a screen door spring, pulled down by a =
large mass.

2  One is a weak spring  being pulled down by very little mass.

3  One is a rubber band being pulled down by a small mass.

Just for comparisons, say they all had the same period of 1.5 seconds.   =
Is one of the three better for recording earthquakes?   Two questions =
here:  Is there an advantage in using a weak spring, or strong spring, =
if the resulting period is the same.  And Secondly is a rubber band =
spring every used?

What prompted the question is seeing how small the spring in a geophones =
is.    Is the idea to have the smallest spring which would move under =
the smaller stimulus.

Thanks, Ted







Hi Everyone,  I wanted to ask some =
questions=20
about choosing a spring for a vertical spring sensor.
 
   Pictures three situations, =
three=20
different springs being pulled straight down by a mass. =
No triangular=20
modifications, just straight down.
 
1 One is a strong spring like a screen =
door spring,=20
pulled down by a large mass.
 
2  One is a weak spring  =
being pulled=20
down by very little mass.
 
3  One is a rubber band being =
pulled down by a=20
small mass.
 
Just for comparisons, say they all had =
the same=20
period of 1.5 seconds.   Is one of the three better for =
recording=20
earthquakes?   Two questions here:  Is there an advantage =
in=20
using a weak spring, or strong spring, if the resulting period is the=20
same.  And Secondly is a rubber band spring every =
used?
 
What prompted the question is seeing =
how small the=20
spring in a geophones is.    Is the idea to have the =

smallest spring which would move under the smaller =
stimulus.
 
Thanks, Ted