Trash-Bot

The can problem could be eliminated if we use bags, which require no returning elements. In fact, if bags alone are the cargo, a dump cart
wouldn't be hard to make. In that arrangement, the bot wouldn't have to wait at the curb because the bot is only delivering, that is, driving to the Curb, dumping, and then returning Home.
--
(||) Nehmo (||)


Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Sun, 22 Jan 2006 18:01:17 -0800, Nehmo wrote:

They don't do this because the trucks are outfitted with a big "robotic" grasper that literally picks the "can" up and dumps it into the truck. And sets it back down, ostensibly in the same place where it picked it up from. (at least here in So. Cal, and probably lots of other places.) Designing/building/implementing something like that that could handle as unpredictable of a load as bags would be prohibitively expensive.
But building a little motorized cart that could carry the can to the curb should be almost trivially easy - just have it follow a wire, or for that matter, a slot! If you get snow, then a snow-blower attachment could be an add-on. ;-) But seriously, this is sounding increasingly simple - a low-profile 4-wheel dolly, with a large wheelbase (for stability), and a reversible motor, like a wheelchair. The technology has been in place for decades, there just hasn't been the volume to get the price down to pennies yet.
And to keep anybody from stealing it, tether it. :-)
Good Luck! Rich
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Does the bot need to be free standing? Can you put it on a track? If you are using the guide wire method you would wind up digging some kind of channel to bury it anyway. Another thought is to think of a similar methodology as a cable car, rather than mounting the locomotion onto the bot, mount it at the bots 'station'.
just a thought... material movement machinery has been around a long time, perhaps looking through a company that sells this type of equipment may spark some ideas...
--
Thanks,

Dean Burell
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Dean Burell -

Nehmo - A track would be fine; no steering would be necessary. But tracks are expensive and require installation. This bot should work in the common situation of a driveway leading the curb. The current state of technology is advanced enough so that the navigation can be provided by small a video camera, a computer, a steering servo, and some software.
For this first one, I'm pretty much settled on the chassis being built from the Harbor Freight cart http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber8137
I don't know how to accomplish the steering and navigation yet.
--
(||) Nehmo (||)


Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Nehmo Sergheyev wrote:

Patriot P130 platform automatically guided vehicle.
    http://www.coreconagvs.com/platform/sgv.html
Probably too expensive and too heavy duty, but check the used market. Anyway, that's basically what you need to do the job.
Here's a smaller variant on that theme:
http://www.robosoft.fr/SERVICE/10_Order/01Cerp/Cerp.html
This is a smaller AGV for use in warehouse order-picking.
                John Nagle
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Fri, 20 Jan 2006 10:32:21 +0000, Nehmo Sergheyev wrote:

I was thinking that this could be done surprisingly simple. Sounds like a line follower robot. Simply provide a line to the curb. Put an ultrasonic/IR sensor package to detect something/someone around so it won't bump into and another to not fall off the curb. Could be put on a timer so that it would follow the line to the curb at a certain time and when the trash is taken off (the weight is lightened) it would follow the line back. I don't think this would be all that technically challenging. Perhaps there are other issues that I am not thinking about but this would probably get you 80% there. But this is what I came up with off the top of my head.
Randy Hootman
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.