Invention Grant
US07397341B2 System to detect lock tampering 有权
系统检测锁定篡改

System to detect lock tampering
Abstract:
A lock and key system is configured to sense an operational signature generated by an object placed into a keyway in the system. The system is further configured to compare the operational signature with a reference signature, and to generate an alarm when the operational signature differs from the reference signature by a threshold.
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