| US 7,482,921 B2 | ||
| Method and device for localizing transponders | ||
| Herbert Froitzheim, Pettendorf (Germany); Matthias Münch, Obertraubling (Germany); and Dieter Wanger, Laaber (Germany) | ||
| Assigned to Siemens Aktiengesellschaft, Munich (Germany) | ||
| Filed on Jul. 19, 2005, as Appl. No. 11/184,355. | ||
| Claims priority of application No. 10 2004 034 876 (DE), filed on Jul. 19, 2004. | ||
| Prior Publication US 2006/0012475 A1, Jan. 19, 2006 | ||
| Int. Cl. G08B 1/08 (2006.01); H04Q 7/00 (2006.01) | ||
| U.S. Cl. 340—539.21 [340/933; 340/572.1; 340/10.1; 73/146; 455/456.1] | 19 Claims |
| 1. A device for localizing transponders, comprising:
a first transponder disposed at a first position in an object and configured to provide a first response signal in response
to a request signal;
a second transponder disposed at a second position, different from the first position, in the object and configured to provide
a second response signal in response to the request signal; and
a base station having:
a transmit/receive device for transmitting a request signal to said first and second transponders and for receiving the first
and second response signals from said first and second transponders, respectively;
an evaluation device for evaluating the first and second response signal, for comparing field strength information associated
with the evaluated response signals to one another, and for determining a distance from the base station to said first and
second transponders based on the comparison of the evaluated response signal;
said first transponder assigned to a first tire mounted on an axle, and said second transponder assigned to a second tire
mounted on the axle.
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