|Software | Application |
|Distance from reader to id|
|We are looking for methods to measure a distance from a central point to a moving object. This distance would be less than 5 meter (within a room) and the accuracy should be within +/- 1 cm. Is this possible with RFIDs?|
Thanks in advance!
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|Question last updated on February 19, 2008, 23:26 PM|
|Total views: 1999|
|by Addison2761, jp|
Thanks for your answer and suggestion! We will look for other methods of doing this.
Theoratically and academically yes. Pratically NO, especially with your accuracy requirement. RFID works better to tell you where the object go rather than the distance between two points. Even you use the way like mobile positioning by setting up three readers. The problem is 5 meter is too short and time of arrival of signals between the RFID tag and the reader antenna are almost equal.
It may have a solution that is not using RFID. Put a wire along the border of your test area. Send a pulse signal regularly along the wire. Inside the object, design a device that can detect the electrical signal from wire and apply some kind of algorithm to compute the distance from the different points on the wire.
|Answer last updated on February 20, 2008, 18:44 PM||
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