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Tamper detector

  • US 10,725,077 B2
  • Filed: 12/01/2016
  • Issued: 07/28/2020
  • Est. Priority Date: 12/01/2016
  • Status: Active Grant
First Claim
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1. A tamper detection device, comprising:

  • a detection circuit, wherein the detection circuit further comprises;

    a reference oscillator, anda detection oscillator having an inductance (L) in combination with a capacitance (C) embedded in the detection circuit, anda detection element comprising a conductor on an opposite side from the detection circuit, wherein the detection circuit is configured tocount a number of detection oscillator clock cycles,compare the counted number of detection oscillator clock cycles to a number of reference oscillator clock cycles,set a detection element status to an undisturbed status after the counted number of detection oscillator clock cycles is within a predetermined tolerance range, wherein the predetermined tolerance range is defined between a low count threshold and a high count threshold,set the detection element status to a disturbed status after the counted number of detection oscillator clock cycles is either above the high count threshold or below the low count threshold,powered by a near-field-communication (NFC) signal,store the detection element status, andelectrically report the detection element status in response to a wireless query signal.

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