Author Topic: Variable Pressure Probe  (Read 2781 times)

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Offline MooseDude2Topic starter

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Variable Pressure Probe
« on: September 06, 2006, 08:50:39 PM »
I'm looking to have an add-on to a robot I created.

The add-on is a probe that can apply a variable pressure.  That is if I want the probe to apply 2psi then the probe will automatically the 2psi.

Any ideas on how to get started with such a device?

Offline Admin

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Re: Variable Pressure Probe
« Reply #1 on: September 06, 2006, 09:31:04 PM »
What you actually want is a force sensor:

and you use this equation:
Pressure = Force / Area

the area being the contact area

But I think you meant to say you want to control force, right?

Offline want2learn

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Re: Variable Pressure Probe
« Reply #2 on: October 29, 2008, 03:25:23 PM »
there is another way, dunno if it'll do though.

you can use qtc pills or pipe as the sensor, essentially these are resistors whose resistance changes as pressure is applied to them. you could use them in a voltage divider, feed the output to an adc in your ucontroller. Its cheaper than admins option but you'll need to design the lot yourself and i dont think it'll  be as accurate as using admins option.

but hey, you get what you pay for
The question that drives me hazy:

Am I, or the others crazy?


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