Dear All, Here my late (sorry) input on reflective tape and distance measure.
Some time ago I did some experiment with the goal of having the e-puck seeing each other at least at the same distance as a white wall. That is about 4 cm. Here a picture of how it looks like: http://www.gctronic.com/img/shop/reflexe-puck.jpg with the reflective tape I have, we need tape strips of 2 mm. Then one e-puck starts seeing the other at about 4 cm using its IR proximity sensors. Im not sure about the results if at the same time you have local communication using the library libircomm (http://www.e-puck.org/index.php?option=com_content&task=view&id=62&Itemid=8 9) I wish you a lot of fun with e-puck. Gilles ------------------------ Dr. Gilles Caprari GCtronic, Electronics & Mechatronics web: www.gctronic.com E-mail: [email protected] Post: Via Cassarinetta 2, CH-6900 Lugano, Switzerland Tel: +41 91 630 2149 Fax: +41 43 556 8006 Mobile: +41 78 601 1113 skype: gillescaprari -----Original Message----- From: Hua vvang [mailto:[email protected]] Sent: martedì, 27. luglio 2010 02:44 To: [email protected] Subject: [E-puck-user] On the distance measurement between bots On the distance measurement between bots This distance measurement discussion from last year is interesting. I am also planing some distance measurements among e-puck robots. Would any of you be kind to offer more on the reflective tape. I did some fundamental research on the reflective sheetings, they are amazingly expensive, and charge differently according to the gain (700X ~ 3000x), which refers to how much the amplitude of the signal is magnified. Any insights on it? Thanks in ad. On Wed, Sep 9, 2009 at 6:00 AM, <[email protected]> wrote: Send E-puck-user mailing list submissions to [email protected] To subscribe or unsubscribe via the World Wide Web, visit https://mail.gna.org/listinfo/e-puck-user or, via email, send a message with subject or body 'help' to [email protected] You can reach the person managing the list at [email protected] When replying, please edit your Subject line so it is more specific than "Re: Contents of E-puck-user digest..." Today's Topics: 1. Distance of detection each other (Michael Kreuzwieser) 2. Re: Distance of detection each other (Alexandre Campo) ---------------------------------------------------------------------- Message: 1 Date: Tue, 08 Sep 2009 15:21:29 +0200 From: Michael Kreuzwieser <[email protected]> Subject: [E-puck-user] Distance of detection each other To: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-15; format=flowed Dear people, we maybe want to set up a few e-puck who find each other and follow one leader in a line. So communication will be with the LED + IR. What maximum distance will be realistic for a detection of another robot? Any experiences? Thank you Michael -- Mit freundlichen Gr??en Michael Kreuzwieser Archimedes Solutions GmbH Saarbr?ckerstr. 24 10405 Berlin TEL +49 (0)30 / 2000 577 16 FAX +49 (0)30 / 2000 577 20 ------------------------------- www.urban116.de <http://www.urban116.de/> www.archi-me-des.de <http://www.archi-me-des.de/> www.movingscience.de <http://www.movingscience.de/> Gesch?ftsf?hrung: A. Valder J. Schmidtsiefen W. Rien S. Spenling Amtsgericht: Berlin Charlottenburg HR Nr.: 107563 B. St.Nr.: 37/310/21112 UST-ID Nr.: DE-253.771.793 ------------------------------ Message: 2 Date: Tue, 8 Sep 2009 15:57:34 +0200 From: Alexandre Campo <[email protected]> Subject: Re: [E-puck-user] Distance of detection each other To: [email protected] Message-ID: <20090908155734.24869...@nomad> Content-Type: text/plain; charset=US-ASCII Dear Michael, in my experience, if you try to detect the back led of a robot with the camera of another one, you can expect a perception range of 20cm max, and that depends on the algorithm you use, and the light conditions of your experiments. We had best results with RGB to HSV conversion + segmentation, in low light environments. IRs are a bit more tricky, if you don't modify the e-puck body and stay with the transparent one, you may detect robots at 2cm, but if you put some reflective tape around the e-puck body, you can reach ~15cm. hope this helps, cheers, alexandre campo. On Tue, 08 Sep 2009 15:21:29 +0200 Michael Kreuzwieser <[email protected]> wrote: > Dear people, > we maybe want to set up a few e-puck who find each other and follow one > leader in a line. > So communication will be with the LED + IR. > > What maximum distance will be realistic for a detection of another robot? > Any experiences? > > Thank you > Michael > ------------------------------ _______________________________________________ E-puck-user mailing list [email protected] https://mail.gna.org/listinfo/e-puck-user End of E-puck-user Digest, Vol 24, Issue 3 ****************************************** -- Best regards, hua
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