<div dir="ltr"><div dir="ltr">Thalanayar,<div> The discussion is about a new DPRG contest called "Sample Retrieval" that is scheduled to be held at the Fall competition in November. If you are interested, the rules are at<a href="https://www.dprg.org/wp-content/uploads/2019/01/sample_retrieval_v20190115.pdf"> https://www.dprg.org/wp-content/uploads/2019/01/sample_retrieval_v20190115.pdf</a>.</div><div>Regards,</div><div>Doug P.</div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jan 24, 2019 at 5:07 PM Thalanayar Muthukumar via DPRGlist <<a href="mailto:dprglist@lists.dprg.org">dprglist@lists.dprg.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Is there an upcoming competition that is being discussed?</div><div>Any details on the competition?</div><div>Asking these questions as I am a newbie to this mailing list.</div><div><br></div><div>Regards.</div><div>- Kumar</div><br><div class="gmail_quote"><div dir="ltr" class="gmail-m_4903485139462014048gmail_attr">On Thu, Jan 24, 2019 at 3:34 PM <<a href="mailto:dprglist-request@lists.dprg.org" target="_blank">dprglist-request@lists.dprg.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Send DPRGlist mailing list submissions to<br>
<a href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a><br>
<br>
To subscribe or unsubscribe via the World Wide Web, visit<br>
<a href="http://lists.dprg.org/listinfo.cgi/dprglist-dprg.org" rel="noreferrer" target="_blank">http://lists.dprg.org/listinfo.cgi/dprglist-dprg.org</a><br>
or, via email, send a message with subject or body 'help' to<br>
<a href="mailto:dprglist-request@lists.dprg.org" target="_blank">dprglist-request@lists.dprg.org</a><br>
<br>
You can reach the person managing the list at<br>
<a href="mailto:dprglist-owner@lists.dprg.org" target="_blank">dprglist-owner@lists.dprg.org</a><br>
<br>
When replying, please edit your Subject line so it is more specific<br>
than "Re: Contents of DPRGlist digest..."<br>
<br>
<br>
Today's Topics:<br>
<br>
1. Re: Sample Retrieval clarification (Doug Paradis)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Wed, 23 Jan 2019 17:57:30 -0600<br>
From: Doug Paradis <<a href="mailto:paradug@gmail.com" target="_blank">paradug@gmail.com</a>><br>
To: John Swindle <<a href="mailto:swindle@compuserve.com" target="_blank">swindle@compuserve.com</a>><br>
Cc: DPRG <<a href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>><br>
Subject: Re: [Dprglist] Sample Retrieval clarification<br>
Message-ID:<br>
<<a href="mailto:CAOdUW%2BYoASn00sE8ecVYzYCNW7Z0XsK2f3NKQaFbRbUXijJUyA@mail.gmail.com" target="_blank">CAOdUW+YoASn00sE8ecVYzYCNW7Z0XsK2f3NKQaFbRbUXijJUyA@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
John,<br>
<br>
I think first it would be best to think about what type of obstacles<br>
are likely in the search area of the contest. We will ask spectators to<br>
move to the edge of the room to give the robots as much room as possible.<br>
The search area will be most of the room. That means there will be arenas<br>
(some on tables), chairs, an odd person (judge, or robot owner), and stuff<br>
I don't currently know about in the room. Of course, there is also the home<br>
base in the search area. The intent of obstacles is to make finding the<br>
target objects more difficult than simple straight-line shots. The robot<br>
will have to "search" to find the objects. I suspect there will be an easy<br>
target in the mix.<br>
<br>
<br>
<br>
Since most of these objects weight substantially more than the robot, I<br>
suspect that obstacle movement due to the robot will be minimal. My<br>
thoughts are; if a chair was moved or shoved a bit that would be okay. If<br>
the robot tried to move a table with an arena or an arena on the floor<br>
(Can-Can Soccer arena), I would be more concerned. The obstacles shouldn't<br>
be an issue for the robots to maneuver about the floor. There should be no<br>
need or reason for shoving things except for poor obstacle detection and<br>
avoidance. I would not recommend a strategy that required shoving obstacles.<br>
<br>
<br>
BTW, a Neato has excellent obstacle detection and avoidance. Also,<br>
obstacles will generally (except for people) be static features that could<br>
be to provide navigation orientation.<br>
<br>
<br>
Less annoying would be good..., but get'her done. We can hand out ear<br>
plugs at the competition with proper planning.<br>
<br>
<br>
Regards,<br>
<br>
Doug P.<br>
<br>
<br>
<br>
<br>
On Wed, Jan 23, 2019 at 2:38 PM John Swindle via DPRGlist <<br>
<a href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>> wrote:<br>
<br>
> Doug,<br>
><br>
> For Sample Retrieval:<br>
><br>
> Is it OK for the robot to shove obstacles, such as chairs, and leave them<br>
> where they were pushed to (until the judge possibly puts them back)?<br>
><br>
> Will obstacles (not samples) be at least as far apart as the max allowed<br>
> dimensions of the robot?<br>
><br>
> I think I'll do like Neato vacs: constantly keep track of the largest,<br>
> farthest-away, static reflections, which are assumed to be the walls. That<br>
> gives orientation, kinda like how competitors square-up with the walls of<br>
> the arena for some of the contests, but with no assumptions about the<br>
> arena, just creating signatures, like what Neato does. And use early<br>
> reflections to identify obstacles. The localizer used to run at about 2kHz<br>
> which was great for "seeing" around chairs and people and even around<br>
> corners, but it was annoying. 2kHz is no good for seeing a<br>
> half-inch-diameter cylinder such as a chair leg. So, I think the mapping<br>
> part will still be low-frequency (but at much lower volume so it isn't<br>
> annoying) and the targeting part will be ultrasonic. I think the same<br>
> emitters and receivers can do both frequency ranges simultaneously.<br>
><br>
> Still largely armchair stuff.<br>
><br>
> Later,<br>
> John Swindle<br>
><br>
> _______________________________________________<br>
> DPRGlist mailing list<br>
> <a href="mailto:DPRGlist@lists.dprg.org" target="_blank">DPRGlist@lists.dprg.org</a><br>
> <a href="http://lists.dprg.org/listinfo.cgi/dprglist-dprg.org" rel="noreferrer" target="_blank">http://lists.dprg.org/listinfo.cgi/dprglist-dprg.org</a><br>
><br>
-------------- next part --------------<br>
An HTML attachment was scrubbed...<br>
URL: <<a href="http://lists.dprg.org/pipermail/dprglist-dprg.org/attachments/20190123/02c974c8/attachment-0001.html" rel="noreferrer" target="_blank">http://lists.dprg.org/pipermail/dprglist-dprg.org/attachments/20190123/02c974c8/attachment-0001.html</a>><br>
<br>
------------------------------<br>
<br>
Subject: Digest Footer<br>
<br>
_______________________________________________<br>
DPRGlist mailing list<br>
<a href="mailto:DPRGlist@lists.dprg.org" target="_blank">DPRGlist@lists.dprg.org</a><br>
<a href="http://lists.dprg.org/listinfo.cgi/dprglist-dprg.org" rel="noreferrer" target="_blank">http://lists.dprg.org/listinfo.cgi/dprglist-dprg.org</a><br>
<br>
<br>
------------------------------<br>
<br>
End of DPRGlist Digest, Vol 28, Issue 19<br>
****************************************<br>
</blockquote></div></div>
_______________________________________________<br>
DPRGlist mailing list<br>
<a href="mailto:DPRGlist@lists.dprg.org" target="_blank">DPRGlist@lists.dprg.org</a><br>
<a href="http://lists.dprg.org/listinfo.cgi/dprglist-dprg.org" rel="noreferrer" target="_blank">http://lists.dprg.org/listinfo.cgi/dprglist-dprg.org</a><br>
</blockquote></div>