作者: Fredrik Einberg , Jakob Ehrensvard
DOI:
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摘要: A tape seal includes electronic circuitry to detect tamper- and manipulation events relating sealed items in various embodiments. complex impedance is formed a continuous seal. The designed such way, that any attempt break or remove the results change of impedance. An module connection with quantifies impedance, when detected above programmed threshold, this treated as tamper event. In one embodiment, inclusion reference impedances are applied allow more precise detection event for automatic calibration natural variations further method determining tampering item disclosed.