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Registered Member #177
Joined: Wed Feb 15 2006, 02:16PM
Location: Munich, Germany
Posts: 214
Hi,
for some days I am trying to find a schematic for a force meter that uses a toroidal ferrit core. If a force is apllied to the core, it's characteristics change slightly (I can't remember anymore details). I have seriuosly been loking for some days and can't find one, although I have found one (or it?) some years ago. This might be due to the lack of keywords to search for.
I hope some people here know what I am looking for and point me into the right direction with some key words (the main principle, or the name of such a device).
Registered Member #177
Joined: Wed Feb 15 2006, 02:16PM
Location: Munich, Germany
Posts: 214
Well its for a actuator system to be used in a robot so pendulum is not a real option. Strain gauge has been tried but it's to difficult to make it work for normal forces. The memsense.com units look good but my budget is to small to afford a few dozens. But thx anyway.
Registered Member #902
Joined: Sun Jul 15 2007, 08:17PM
Location: North Texas
Posts: 1040
here is what you should do (I built one once, but I didn't build it well)... you have the wire wrapped doughnut core that has a suspended plunger with a magnet at the bottom of it, and above the centerline of the core, and there is a fixed, repelling magnet underneath the core and pushing up the plunger (it is how it returns to place and how the unit is calibrated, as the maximum force that can be applied which causes the two magnets to touch is the maximum capability of the meter)
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Force meter/detector (using a ferrit torroid)
