Subject:
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Re: Bumper Ideas Needed
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 31 Dec 1998 12:19:32 GMT
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Original-From:
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Zachary Bourk <zbourk@san.rr.com^StopSpam^>
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Viewed:
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1326 times
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Hey Simon:
I got it!
If you mount the touch sensor centrally on your craft and you make a jig
using the springy arms (corrugated stuff) that goes totally around the
robot and ... I'll put a picture up on my website ASAP
You have to monitor a "not-touching" positive input from the single
touch sensor.
Simon Brooke wrote:
>
> Laurentino Martins wrote:
> >
> > Hi
> >
> > I've been the working in making a flexible bumper using only one switch for my CyberMaster and after constructing about 4 or 5 prototypes I've found out that after all I don't know how to make a decent flexible-and-with-lots-of-travel bumper.
> > I need such a bumper for detecting impacts ahead of the real impact so I can make a soft stop before impacting the object. Also, the bumper should be able to read impacts with a wide angle (45 degrees).
> >
> > Since it seems bumpers are one of those things everybody needs and LEGO has forgotten to create, I think we could create a mini-contest on how to create the best bumper with standard LEGO parts.
> >
> > By the way, anyone have any mechanical idea how to make a small round bumper that reacts to 360 degrees impacts (I mean, any horizontal impact around the sensor) and using only one sensor?
>
> I've had a good deal of success with multiple antennae hanging from
> horizontal axes which when actuated lift a piston vertically to connect
> with a sensor mounted above it, thus:
>
> # <- touch sensor
>
> ^
> | <- piston
> |
> ===
> o--- ---o <-- antenna pivot
> / \
> / \ <-- antenna
> / \
>
> It's pretty easy to do a four-antenna system actuating a single touch
> sensor so that impacts in any of the four cardinal directions register;
> it might be possible to extend this to register 'all round' impacts, but
> I haven't been very successful yet with corner impacts.
>
> --
> simon@jasmine.org.uk (Simon Brooke) http://www.jasmine.org.uk/~simon/
>
> -- mens vacua in medio vacuo --
> --
> Did you check the web site first?: http://www.crynwr.com/lego-robotics
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message is in Reply To:
 | | Re: Bumper Ideas Needed
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| (...) I've had a good deal of success with multiple antennae hanging from horizontal axes which when actuated lift a piston vertically to connect with a sensor mounted above it, thus: # <- touch sensor ^ | <- piston | === o--- ---o <-- antenna pivot (...) (26 years ago, 31-Dec-98, to lugnet.robotics)
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