Subject:
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Re: tuch sensitive sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 22 Dec 2003 16:53:24 GMT
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Original-From:
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Pavel Kyn <PAVEL.K@RCN.saynotospamCOM>
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Viewed:
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2627 times
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> I'm thinking of a tuchsensitive sensor. Not the on/off type or with only • one
> resistor value. I'm thinking of a tuchsensor that can register how far the
> button is pressed with an analogue value.
Regarding the raw sensor technology to measure the force pressing on a
button, a spring-loaded potentiometer is one solution. Other potential
solutions include piezo-resistive sensors, a strain-gage mounted on a
moment-arm, or even micro-machined accelerometers (e.g. Analog Devices ADXL
series). These all would need adapter circuits to allow attachment to the
LEGO RCX.
-Pavel
----- Original Message -----
From: "Øyvind Steinnes" <phoenix@online.no>
To: <lego-robotics@crynwr.com>
Sent: Monday, December 22, 2003 9:13 AM
Subject: tuch sensitive sensor
> Hello folks,
>
> I just come up with an idea, maybe there is a sensor like this made
> already...
>
> I'm thinking of a tuchsensitive sensor. Not the on/off type or with only • one
> resistor value. I'm thinking of a tuchsensor that can register how far the
> button is pressed with an analogue value.
>
> Technicaly this can be done by mounting a small varialble resistor (pot)
> onto a pin or rack of somekind that rotates when the button on the
> tuchsensor is been pressed in? There is some other types of pot that is • not
> rotating but are moving in a line. Have not yet seen those in a small size
> that will fit into a 2x3 tuchsensor brick type of housing.
> Got the idea?
>
> The problem for accuracy is the reading from the RCX, if it is only • reading
> the sensor each 3ms it will only register tuch on the sensor from min to • max
> when it is been pressed with 3ms or less time from outer possition to • inner
> possition.
>
> There are many aplication you can use this type of sensor for. Like a • robot
> that should grip something, and you dont want it to grip to hard. Use • those
> tuchsensitive sensors on the "fingertips" on the robotic arm and it can
> "feel" when the fingers are tuching something and know how hard its grip • is.
> Another aplication is a piano. Tuchsensitve sensor under each keys, and • the
> piano knows how hard (fast) you have tuched the keys and kan make the • volume
> of the tones acording to that.
>
> I've looked around on websites but cant find any sensor like this.
> Is there one already out there someplace? Or maybe someone is up to the • task
> to make some? Do this sounds intresting at all?
>
>
> Regards
> Øyvind Steinnes
> http://www.brickshelf.com/cgi-bin/gallery.cgi?m=Phoenix
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Message is in Reply To:
 | | tuch sensitive sensor
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| Hello folks, I just come up with an idea, maybe there is a sensor like this made already... I'm thinking of a tuchsensitive sensor. Not the on/off type or with only one resistor value. I'm thinking of a tuchsensor that can register how far the (...) (23 years ago, 22-Dec-03, to lugnet.robotics)
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