#robotics | Logs for 2016-06-23

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[00:00:52] <mrdata> do you want to use all that? thew odometer is simpler; it doesnt care that you went forward then reversed a thousand times to move across one football field. GPS kind of does care
[00:01:08] <mrdata> but in terms of wear, the odometer is probably better
[00:01:35] <codepython777> mrdata: I want to use all that for position
[00:01:43] <mrdata> then you'll be in trouble
[00:02:00] <mrdata> because the different methods wont always agree
[00:02:01] <Jak_o_Shadows> That's a hard, but reasonably solved problem.
[00:02:18] <Jak_o_Shadows> Keywords might be sensor fusion or kalman filters
[00:02:37] <mrdata> i mean you could use that to detect that the drive wheel is stuck in the mud, i suppose
[00:02:42] <Jak_o_Shadows> The basic principle is that you calculate where you think you are based on all the sensors, weighted with respect to their accuracy.
[00:02:48] <codepython777> Jak_o_Shadows: I was hoping there would be a nice codebase I could use - instead of a pile of code + ROS?
[00:03:01] <Jak_o_Shadows> Oh, I have no idea about that.
[00:03:18] <Anniepoo> some youtube video informed me that they used the 3rd fastest wheel on the lunar rover for odometry
[00:03:37] <Jak_o_Shadows> But like, you can do cool things like predict your future positin based on your current velocity, even if you don't have a measure of velocity
[00:04:02] <mrdata> you could use that to detect that the robot was loaded onto a flatbed and stolen
[00:05:41] <mrdata> but no odometer i know of is that complex
[00:06:18] <codepython777> how hard is it to do this if i have to install ros, feed the data from my sensors into it, and then apply a filter on top of the data?
[00:33:17] <Snert> I dunno, but it sounds like alot of fun :)
[09:28:32] <rue_house> I'm eternally amused how you guys use computer vision and I just put a sensor where I need it.
[10:02:30] <DagoRed> lol
[10:03:20] <deshipu> rue_house: got any more straw men?
[10:06:50] <z64555> straw men are very easy to fabricate. the straw women however require more finesse
[10:07:05] <deshipu> how about straw aliens?
[10:10:08] <z64555> I cannot confirm nor deny their existance
[10:42:42] <sherrardtr> hello
[14:15:08] <anonnumberanon> any new documented projects in here?
[14:27:54] <DagoRed> /buffer 1
[16:53:47] <deshipu> https://www.youtube.com/watch?v=tf7IEVTDjng
[17:21:50] * deshipu drools
[17:26:47] * Tom_itx gives deshipu a bib
[17:29:31] <Tom_itx> stupid bot
[17:29:48] <Tom_itx> picked up the dishes and trash but didn't pick up the bananna he fell on
[17:30:55] <Tom_itx> iirc that was originally a govt project but they rejected it
[20:59:13] <rue_shop3> boss says if the house neutral wire is bad, it wont start to show trouble till I hit 10A
[20:59:32] <rue_shop3> he says to put 50A on one side of the service, see if something burns up
[21:00:07] <z64555> preferably that "something" would be a fuse or breaker
[21:00:20] <z64555> not, say, a solid line across the wallpaper
[21:00:21] <rue_shop3> or a splice on a power pole
[21:02:39] <z64555> even better! have the power company deal with it
[21:59:50] <bindigoat> https://www.pdfhost.net/index.php?Action=DownloadFile&id=a69909d008f61223cc9fbd115c62c6f8
[22:00:01] <bindigoat> Space robotics
[22:15:28] <rue_house> there has been a spider living in the bathroom sink for like 3 days, wtf is it eating to stay alive?
[22:18:43] <Tom_itx> rue_house, they were printing with some sort of flexible material at the lab... rubber of sorts
[22:18:53] <Tom_itx> on a regular cheap printer
[22:26:10] <Jak_o_Shadows> I want one: https://www.youtube.com/watch?v=tf7IEVTDjng
[22:26:47] <Jak_o_Shadows> Through I still think you need more elastic elements in a leg
[22:26:52] <Tom_itx> it's just not in your feasable budget
[22:27:07] <Jak_o_Shadows> Oh, absolutely not.
[22:27:17] <Jak_o_Shadows> The googly eye on the arm are though :D
[22:28:26] <Jak_o_Shadows> Pretty slick actuators on the knee joint