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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Fri, 4 Dec 1998 19:22:03 GMT
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Original-From:
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alex wetmore <alex@phred.org*avoidspam*>
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Viewed:
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2190 times
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On Fri, 4 Dec 1998, Laurentino Martins wrote:
> 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 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 the switch
in normal state. When it bumps into something the axle would move
off of the switch and you'd know that you hit something.
The hard part for such a system would be keeping it centered normally.
The best bumper that I've built was based on the one for the tourbot.
I changed it to normall press the button. I then added arms going
backwards from the main bumper arms (so about 120 degree angle between
the front arm and one to the side). These would hit things during
left and right turns and would move off of the switch. During
frontal impact it also moved a piece of off the switch, but in
the other direction. Sorry, I don't have a picture handy.
My plan for a 360 degree bumper was to use two switches, one for
left/right bumps and one for front/back bumps. The would go down
to some sort of swinging bumper which would move off of the button
when it was hit. The problem that I expect to hit with this design
is coming up with somethig where the bumpers don't interfere too
much with each other.
alex
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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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