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AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsSylvain Bacquet, Elisabeth Crochon, Thierry Thomas
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A method for managing a data transfer system includes recovering energy at peripheral devices, and wireless transfer recovered energy to a base by synchronizing RF signals transmitted by double-loop antennas. Synchronizing includes implementing a listening phase to detect a radio-frequency signal transmitted by said central base, and either sending an RF signal that is synchronous with the detected signal or transmitting a signal at a predetermined frequency depending on whether an RF signal is detected at the base. The method includes, in response to receiving a signal from the peripheral device at that frequency, causing the base to recover the received signal and to re-transmit at the predetermined frequency to the peripheral devices. This signal synchronization enables simultaneous energy transfer from peripheral devices to the central base while avoiding mutually destructive effects between said signals.
A method for managing a data transfer system including a plurality of peripheral devices, a central base, and radio-frequency communication means for enabling data to be transferred between said peripheral devices and said central base, said central base including an antenna tuned to a predetermined frequency, said peripheral devices each having a double-loop antenna, said double-loop antenna having a first loop handling transmission of a radio-frequency signal and a second loop handling reception of a radio-frequency signal, said first and second loops configured to have zero mutual impedance therebetween, said method comprising at said peripheral devices, recovering energy, transferring at least a portion of said recovered energy to said central base via said radio-frequency communication means, and synchronizing radio frequency signals transmitted by said double-loop antennas, wherein synchronizing radio frequency signals includes in response to triggering of communication from a peripheral device to said central base, implementing a listening phase using a second loop to detect a radio-frequency signal transmitted by said central base, and at least one of in response to detecting a radio-frequency signal transmitted by said central base, causing said peripheral device to use said detected radio-frequency signal to transmit, to said central base, a radio-frequency signal that is synchronous and in phase with said detected radio-frequency signal, and in response to detecting an absence of a radio-frequency signal transmitted by said central base, causing said peripheral device to transmit a radio-frequency signal at said predetermined frequency, and wherein synchronization further includes, in response to receiving a radio frequency signal transmitted by said peripheral device at said predetermined frequency, causing said central base to recover said received radio-frequency signal and to re-transmit a radio-frequency signal at said predetermined frequency to said peripheral devices, whereby said synchronization of said radio-frequency signals enables a simultaneous energy transfer from said peripheral devices to said central base while avoiding mutually destructive effects between said radio-frequency signals.
An apparatus for data transfer, said apparatus comprising a plurality of peripheral devices, a central base, and radio-frequency communication means enabling transfer of data between said peripheral devices and said central base, wherein said central base includes an antenna tuned to a predetermined frequency and configured to recover a radio-frequency signal transmitted by said peripheral devices at said predetermined frequency and to retransmit a radio-frequency signal at said predetermined frequency to said peripheral devices, wherein each peripheral device comprises energy recovery means intended to supply energy to said peripheral device and to said central base via said radio-frequency communication means, a double-loop antenna having first and second loops configured to obtain zero mutual impedance therebetween, said first loop being configured to transmit a radio-frequency signal, and said second loop being configured to receive a radio-frequency signal, said double-loop antenna being configured to implement a listening phase in order to detect a radio-frequency signal transmitted by said central base when said process of communication from said peripheral device to said central base is triggered, in response to detecting a radio-frequency signal, to transmit to said central base a radio-frequency signal that is synchronous and in phase with said detected radio-frequency signal, and in the absence of a radio-frequency signal, to transmit a radio-frequency signal at said predetermined frequency.
Dependencies are inferred from the claim text.