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By buchwald
#205212
I have purchased a smultaneous RFID Reader - M6E Nano and an antenna. With it I would like to build a timekeeping (for a race). The antenna and the chip are mounted at the finish line. If the competitor comes to the finish line, the transponder will probably be recognized several times (eg 10 times during the crossing of the finish line). To determine the target time, I would like to take those who, for example, 10 measurements, in which the transponder was closest to the antenna. Can I evaluate the position? On the homepage there is a video with several frisbee, whose Algorthmus is based on a similar principle. Thank you for your help. I would like to realize it with an Aduiono.
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By TS-Mark
#205250
Hi buchwald,

This is definitely possible with the Simultaneous RFID Reader but is going to most likely take some tweaking of the position of the antenna on the finish line to get the best results.

In the demo video, Nick changed the EPCs of each tag for each competitor and then took each tag the RFID reader read in range for each "heat" and stored the EPC and RSSI of each read tag in an array. The tag that was read with the highest/strongest RSSI would be the winner. The Constant Read Example is a good place to start since it prints both the EPC and RSSI of each tag that is read.

Now, for using this in a race with a tag on a person, it is going to be tricky since having a tag on a person is going to drastically reduce the read range of the M6E Nano, even with the external antenna. You will need to play with the position of both tag and reader to get the best results. The Range Test Example in the Hookup Guide shows the ideal conditions for measuring max read range with the M6E and the external antenna. The UHF RFID Antenna we carry has a linear vertical polarization meaning the waves propagate in a straight waveform from the direction the antenna is pointed.

I hope this information helps you get started with this project. If you have any other questions about the Simultaneous RFID Reader, let us know and we would be happy to help as much as we can.