On Tue, 18 Mar 2003, Trei, Peter wrote: > Mike, Go to the literature. They are already scanning 20 - 1000 of > tags per second (most of the more realistic reports seem to be > below 50 tps). So it takes 10 seconds to scan my cart? That's > a hell of a lot better than 5 minutes or so by hand.
I'll go do that. I always saw those as 1 item at a time scans on conveyor belts. That's *not* the same thing as a cart full of stuff responding simultaneously. > > References:: > http://www.cfo.com/article/1,5309,8661,00.html?f=related (CFO magazine) > Library applications (v scary) > http://www.vernlib.com/VernStep6.asp > For some actual rates: > http://www.autoid.org/2002_Documents/WG4_SG3/Dec2002/SG3_200211_347_PtB_Demo > .pdf > Critical article on library applications > http://www.vtls.com/Products/rfid/documents/choosing.pdf > 200-800 tps: > http://www.matricsrfid.com/pdf/Inlays_Data_Sheet.pdf Note in the last one it says: * Single inlay, free air, no obstacles, high performance Matrics reader equipment. U.S. FCC power limits implied. So the manufacturer is pointing out only *one* rfid is in the scanner. Which is my point - a whole cart load won't work (yet!) I suspect it will in time. > ...now if we can only get rid of the delays caused by people who've clipped > 50 coupons, and insist on paying by check.... :-) One of these days that'll be me! Patience, persistence, truth, Dr. mike
