I am unaware of any RFID solution that has been classified as a “safety system.” In fact, I’m not sure what is meant by that term, or who would do the classifying.
I don’t think it’s possible to prove that all tags have been read with any RFID system, unless you know how many tags are in a field by some other means, and then have the RFID system confirm that it read all of the tags. But I think you are asking for a solution that could guarantee that all tags are read all the time, and I don’t believe that’s possible.
That said, active RFID systems can read tags reliably. A few years ago, I visited Transcore‘s test track, near Albuquerque, N.M., and watched as cars of varying shapes and sizes made endless loops around a track, with tags being read 100 percent of the time. The company did this under varying weather conditions, in order to prove that its toll system was 100 percent reliable.
If any of our readers have any suggestions, or if the questioner can possibly provide additional details about what he or she means by a “safety system,” I would be happy to explore this topic further.
—Mark Roberti, Founder and Editor, RFID Journal
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