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 13:55:32 GMT
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Original-From:
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Simon Brooke <simon@jasmine.^NoSpam^org.uk>
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Viewed:
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1338 times
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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
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===
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
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Message has 2 Replies:
 | | Re: Bumper Ideas Needed
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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 (...) (26 years ago, 31-Dec-98, to lugnet.robotics)
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Message is in Reply To:
| | Bumper Ideas Needed
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| 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-lo...-of-travel bumper. I (...) (26 years ago, 4-Dec-98, to lugnet.robotics)
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