Wireless tamper detection sensor and sensing system

Details Wireless tamper detection sensor and sensing system Wireless tamper detection sensor and sensing system

2007-09-28

2011-10-25

Hess, Daniel (Department: 2876)

Registers

Coded record sensors

Particular sensor structure

C235S435000, C235S439000

Reexamination Certificate

active

08042739

ABSTRACT:
A wireless tamper detection sensor is defined by a perforated electrical conductor. The conductor is shaped to form a geometric pattern between first and second ends thereof such that the conductor defines an open-circuit that can store and transfer electrical and magnetic energy. The conductor resonates in the presence of a time-varying magnetic field to generate a harmonic response. The harmonic response changes when the conductor experiences a change in its geometric pattern due to severing of the conductor along at least a portion of the perforations. A magnetic field response recorder is used to wirelessly transmit the time-varying magnetic field and wirelessly detecting the conductor's harmonic response.

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