Measurement of normal force (squeezing force) on a cylinder
Measurement of normal force (squeezing force) on a cylinder
(OP)
I am working on a research project at Harvard. I have to measure the normal force created by a vine around a cylinder. It is interest problem posing many complications. See this video for a better understanding (requires divx and take a little while to load):
Vine Video
If the link does not work copy and past this:
ftp://ftp.jashale:ftp@isua.iastate.edu/chmbrVine2.avi
The forces are on the order of .01 to 1 newton. ANY SUGGESTIONS?
Vine Video
If the link does not work copy and past this:
ftp://ftp.jashale:ftp@isua.iastate.edu/chmbrVine2.avi
The forces are on the order of .01 to 1 newton. ANY SUGGESTIONS?





RE: Measurement of normal force (squeezing force) on a cylinder
Think about the pressure in a balloon if you start squeezing it.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Measurement of normal force (squeezing force) on a cylinder
A problem that arises with a balloon is temperature effects. Also small forces spread out over a large area cause the change in pressure to the vine to be very small.
The balloon alone has already been tried. The vine does not like to grow on the balloon.
RE: Measurement of normal force (squeezing force) on a cylinder
http://ww
TTFN
RE: Measurement of normal force (squeezing force) on a cylinder
Otherwise you take a cylinder, machine or cut a slot down its entire length. You then compress it slightly and affix a strain gauge across the gap. (epoxy is standard) Then uncompress it. You will get a tension. Now as the vine wraps it you will see a loss of this tension. You may still need to compensate for temperature but the same method will suffice.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Measurement of normal force (squeezing force) on a cylinder
http://www.sensorprod.com/pressurex.html