Subject:
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Re: Fw: 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 19:06:36 GMT
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Original-From:
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Laurentino Martins <lmartins@marktest.pt!avoidspam!>
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Viewed:
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2269 times
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The idea of the pendulum if great, and it's even easier that you imagined it.
Imagine the pendulum is an inverted cone, much like the things they use in the buildings to see if they are straight (I don't know the name in English, sorry).
If you put the touch sensor directly below it, pressed against the cone, then when something moves the cone, it will move away and the sensor will un-press.
After some movement, the pendulum would return to it's place pressing the sensor again.
Although I think this is one idea, I doubt a bit of the usefulness of it... maybe for detecting earthquakes, who knows? :-)
Sorry the bad English
Laurentino Martins
At 18:38 04-12-1998 Friday , you wrote:
> I think I have an idea (rough) that would allow 360 and give directional. It
> may ramble a bit, but I'll try to keep it brief.
> <ramble>
> Use whatever lego bit's you like to fully encircle the bot and have it on
> some sort of fulcrum-like apparatus, so that on impact, the whole circle
> moves like a pendulum.
> Either at the top or bottom, the 'see-saw' action drives a gear that drives
> something to depress the touch sensor _and_ allow for other 'outputs' such
> as transmission reversal, or another sensor activation, or whatever.
> </ramble>
> I could provide a rough sketch offline, or ramble more if anyone likes the
> basic idea and wants to collaborate further.
> trowt
> -----Original Message-----
> From: Haines, Corey <Corey_Haines@cmvc.com>
> To: Lego-Robotics <lego-robotics@crynwr.com>
> Date: Friday, December 04, 1998 12:30 PM
> Subject: RE: Bumper Ideas Needed
>
>
> One idea I was having was something like a ring that could shrink and
> grow, sort of like have four sections, two of which can slide into the
> other two, then, no matter what part you press on now, the whole ring
> compresses into a smaller diameter. You could then attach a single
> sensor somewhere along the ring, whenever and wherever there is a bump,
> the ring would compress, the touch sensor would trigger. Of course, this
> wouldn't give any direction information, but it would nonetheless need
> only one sensor.
>
> -Corey
>
> > -----Original Message-----
> > From: Laurentino Martins [mailto:lmartins@marktest.pt]
> > Sent: Friday, December 04, 1998 1:10 PM
> > To: Lego-Robotics
> > Subject: Bumper Ideas Needed
> >
> >
> > 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 2 Replies:
 | | Re: Fw: Bumper Ideas Needed
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| If you use a rubber band to supply the "downward" force instead of gravity, you get a much more flexible device. Laurentino Martins wrote in message <4.1.19981204185740....90.220>... (...) it. (...) the buildings to see if they are straight (I don't (...) (26 years ago, 4-Dec-98, to lugnet.robotics)
| | | Re: Fw: Bumper Ideas Needed
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| (...) Hey, I don't know the english name either, don't worry. :) I think I know what you meant, tho - like, like this or something? :) | | | | | | | | | | | | | | | | ---...--- \ / \ / \ / \ / \/ (...) Not everyone needs to have English as a first (...) (26 years ago, 4-Dec-98, to lugnet.robotics)
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Message is in Reply To:
| | Fw: Bumper Ideas Needed
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| I think I have an idea (rough) that would allow 360 and give directional. It may ramble a bit, but I'll try to keep it brief. <ramble> Use whatever lego bit's you like to fully encircle the bot and have it on some sort of fulcrum-like apparatus, so (...) (26 years ago, 4-Dec-98, to lugnet.robotics)
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