SENSING SYSTEM FOR MONITORING A PREDETERMINED SPACE
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United States of America Patent
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Issued Date -
Nov 4, 2010
app pub date -
May 19, 2008
filing date -
May 21, 2007
priority date (Note) -
Abandoned
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Abstract
A sensing system (10) for monitoring a predetermined space comprises a control unit, one or more antenna electrodes (14) connected to the control unit and an autonomous modulator (12). The autonomous modulator (12) is arranged at a certain distance from the antenna electrode (14) operable as emitter antenna electrode in such a way that at least a part of the space to be monitored lies between the first autonomous modulator (12) and the antenna electrode operable as emitter antenna electrode. The control unit (16) and the first autonomous modulator are furthermore adapted to one another in such a way that the RF response signal emitted by the autonomous modulator (12) is responsive to the presence of a conductive body in the part of the space to be monitored between the first autonomous modulator (12) and the antenna electrode (14) operated as emitter antenna electrode.
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