Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Nexans

Commissariat a L'energie Atomique Et Aux Energies Alternatives

François Frassati

Ghislain Despesse

Thierry Thomas

Sébastien Boisseau

Vincent Josselin

Mélanie Descharles

Olivier Freychet

Jean Pierre Mascia

Alessandro Tundo

The invention essentially consists of a system () for transmitting acoustic power, which will determine the optimum frequency and the optimum electrical load without data communication being established beforehand with the receiver ().

Method for operating an acoustic transmission system so as to optimize transmitted power

A locating device for determining a distance of an RFID tag with respect to an interface between two media comprising an inductive coupling antenna and a sensor for determining a distance between the antenna and the interface. There is an energizing circuit configured to energize the antenna to generate an electromagnetic field with various successive amplitude values and a detection device for detecting an electromagnetic field response from the RFID tag. There is a processing circuit configured to determine several pairs of information, each pair including: a distance between the antenna and the interface and a minimum electromagnetic field value detected by the detection device from the RFID tag at the determined distance between the antenna and the interface. The processing circuit also evaluates the distance between the RFID tag and the interface as a function of the several pairs.

Locating device for evaluating the distance between an RFID label and an interface

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Voreppe, France

François Frassati