Subject:
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Bumper Ideas Needed
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 4 Dec 1998 18:09:48 GMT
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Original-From:
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Laurentino Martins <lmartins@marktest.ptAVOIDSPAM>
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Viewed:
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2344 times
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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-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?
Laurentino Martins
[lau@mail.telepac.pt]
[http://www.terravista.pt/Enseada/2808/]
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Message has 6 Replies:
 | | Re: Bumper Ideas Needed
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| Laurentino Martins wrote in message <4.1.19981204174702....90.220>... (...) 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. You (...) (26 years ago, 4-Dec-98, to lugnet.robotics)
| | | Re: Bumper Ideas Needed
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| (...) It's almost instantaneous. The problem is that I'm trying to map a room mapper and I don't want it to move it's position because of an impact so I know where it stands. Besides, the motors can make the bot move very fast! (...) Great idea!!! (...) (26 years ago, 4-Dec-98, to lugnet.robotics)
| | | Re: Bumper Ideas Needed
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| (...) I've had the best luck building wide range bumpers by making the switch normally pressed, and having it go to the 0 state when the bumper hits something. For a small round bumper I would try and do something where I have an axle centered over (...) (26 years ago, 4-Dec-98, to lugnet.robotics)
| | | Re: Bumper Ideas Needed
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| In article <4.1.19981204174702....1.90.220>, Laurentino Martins <lmartins@marktest.pt> writes (...) I don't know which Lego components you could use for this, but I once saw an all-round bump sensor which looked like the wire frame of a lampshade, (...) (26 years ago, 5-Dec-98, to lugnet.robotics)
| | | Re: Bumper Ideas Needed
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| I think the limitation is thinking in only two dimensions. For a 360 sensor (albeit one that cannot tell which direction hit it), I can concieve of a ring bumper suspended in the center over the robot. The attachment is via a universal joint like (...) (26 years ago, 23-Dec-98, to lugnet.robotics)
| | | 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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