From: Niklas Holsti <niklas.holsti@tidorum.invalid>
Subject: Re: Ada libraries to deal with RFID tags
Date: Fri, 23 Dec 2022 20:38:42 +0200 [thread overview]
Message-ID: <k0matiFlinsU1@mid.individual.net> (raw)
In-Reply-To: <5f1fb857-21f6-4be2-9010-0c89062a47abn@googlegroups.com>
On 2022-12-23 19:23, Saada Mehdi wrote:
> 3 reading receiving towers should be able to triangulate/pin-point
> passive RFID chips at any given time.
You wanted 10 cm precision, right? If you use time-of-flight to compute
the position, this requires about 0.3 ns timing precision and
synchronization, if each Tx/Rx tower times its own sending and
reception. You could get around the synch problem by cabling the Tx/Rx
signals from and to a central Tx/Rx, but you still have to be able to
measure the time differences between the three Rx signals to that
precision. I doubt if that can be done with standard RFID Tx/Rx electronics.
Some discussion, negative and positive, here (part of the result of a
web search for "RFID triangulation"):
https://www.quora.com/Can-the-position-of-a-RFID-tag-be-tracked-with-high-precision-in-a-2D-or-3D-space?share=1
There are some references to fancier electronics that can provide good
spatial resolution.
next prev parent reply other threads:[~2022-12-23 18:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-23 16:41 Ada libraries to deal with RFID tags Saada Mehdi
2022-12-23 17:00 ` Saada Mehdi
2022-12-23 17:23 ` Saada Mehdi
2022-12-23 18:38 ` Niklas Holsti [this message]
2022-12-23 18:53 ` Saada Mehdi
2022-12-27 12:13 ` Björn Lundin
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox