Robotics : 11980


Robotics / 11980

Re: Autonomous Robot —Mario Ferrari

(...) questioned (...) Sure, I do :-) (...) my (...) Many thanks for your kind words about my and ItLUG sites. I'm happy you like them. I have recently slightly rearranged my site to make navigation easier. I'm going to post some new robots in a few (...) (24 years ago, 4-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Mauro Vianna

(...) a (...) the (...) reads (...) Sorry, Mario, I still didn't figure out your proposal. Could you explain that better? Did you (or anybody else?) already did that? Maybe if I can understand better looking at the code, if available... (...) that. (...) (24 years ago, 6-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Mario Ferrari

(...) still (...) of (...) one (...) It's true that when you're on the border of the tape your light sensor reads an average value, but if you continue in the same direction you will finally get into the middle of the tape and supposing the tape is (...) (24 years ago, 6-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Steve Baker

(...) Hmmm - but if the robot was driving nearly parallel to a white tape, then hit the boundary (thus getting a prolonged mid-grey value) and then drifted off just enough to get back over dark floor - then the input to the sensor could exactly (...) (24 years ago, 6-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Mario Ferrari

(...) still (...) of a (...) one from (...) see the (...) reads (...) situation. (...) reads (...) finally (...) you (...) to do (...) drifted (...) You're right. Some specific behaviour might improve the chances to understand the situation. For (...) (24 years ago, 7-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Doug Weathers

in article 398D9DA5.300D416C@airmail.net, Steve Baker at lego-robotics@crynwr.com wrote on 8/6/00 10:17 AM: (...) <regretfully snipped excellent discussion of using line following to find bar codes for landmark recognition> It would be nifty if you (...) (24 years ago, 8-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Ian Warfield

I thought of another possibility for robot coordinate recognition. It's rather unorthodox, however, and requires some special equipment and setup to make it work. Still, in the interest of creative discussion... Building off the base station idea (...) (24 years ago, 8-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Steve Baker

(...) Clever! ...Food for thought! The only snag I can see is that when the first laser is being acquired, both the tower and the robot have to spin. It might take a LOT of rotations for them both to happen to be pointing in the right direction for (...) (24 years ago, 8-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Ian Warfield

(...) Thanks! (...) Not if you used an omnidirectional laser sensor. Picture, instead of only one face of paper, a paper cylinder. There would be a tube of paper mounted on top of a circular LEGO piece (or *pieces* arranged in a circle) with a paper (...) (24 years ago, 8-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Mario Ferrari

(...) both (...) for (...) one (...) on (...) paper (...) Now (...) paper (...) Wherever (...) I find Ian's proposal about the laser tower very clever. The only bad point about using an omnidirectional laser sensor on the robot is it can't get any (...) (24 years ago, 8-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Steve Baker

(...) Yes - that's where I started thinking. It seemed to me that if the circle was large enough, odometry would put you inside the circle - then driving out of the circle in any direction would get you to cross all the bar codes. Presuming you use (...) (24 years ago, 8-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Doug Weathers

in article FyyAqy.5zy@lugnet.com, Ian Warfield at ipw47@hotmail.com wrote on 8/7/00 6:56 PM: (...) That's what this is all about, after all. Type on! (...) There are two ways to design a laser sensor - directional or omnidirectional. Either way (...) (24 years ago, 9-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Steve Baker

(...) You can work it out easily enough - if you know the height of the tower and the angle of the laser to the ground. For (say) a 1 meter tall tower, the error (in meters) is 1 / tan ( A ) - 1 / tan ( A + 1 ) ...so if the beam is at 45 degrees to (...) (24 years ago, 10-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Doug Weathers

in article 398F84B6.F9AE89A8@airmail.net, Steve Baker at lego-robotics@crynwr.com wrote on 8/7/00 8:55 PM: (...) Of course, if odometry puts you inside the circle, you don't need bar codes because you already know where you are! (...) True, and I (...) (24 years ago, 9-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Steve Baker

(...) No - the idea is that the odometry only has to be accurate enough to get you ANYWHERE within (say) a 1 foot radius circle. Then you drive away and read whichever section of the barcode you happen to cross on the way out - which tells you your (...) (24 years ago, 10-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Doug Weathers

in article 3991FAAF.A8D0FDBA@airmail.net, Steve Baker at lego-robotics@crynwr.com wrote on 8/9/00 5:43 PM: (...) <snip> (...) You can handle this two ways. 1) omnidirectional laser sensor with cylindrical cross-section, which always has the same (...) (24 years ago, 10-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Steve Baker

(...) Yep - that would work - but we don't have an omni-directional sensor. I guess a conical diffuser with a regular lego sensor pointing straight upwards would work OK though. (...) Yes - I wanted to avoid having to continually distract the robot (...) (24 years ago, 11-Aug-00, to lugnet.robotics)

Re: Autonomous Robot —Doug Weathers

in article 399399F2.ADECFC6D@airmail.net, Steve Baker at lego-robotics@crynwr.com wrote on 8/10/00 11:15 PM: (...) That's the sort of thing I've been imagining. JP Brown's Laser Target invention (URL) be generalized up to something involving a paper (...) (24 years ago, 11-Aug-00, to lugnet.robotics)