AREA INTRUSION MATERIAL DETECTOR, FACE DETECTION TYPE PRESSURE SENSITIVE UNIT AND CRIME-PREVENTION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an area intrusion material detector capable of appropriately detecting an intrusion material without being influenced by weather or the like; and to provide a face detection type pressure sensitive unit and a crime-prevention system.;SOLUTION: The area intrusion material detector 1 detects the vibration of gravel transferred to a sheet-like vibration conductor 3. The area intrusion material detector comprises: the sheet-like vibration conductor 3 horizontally propagating an applied vibration; a vibration detection sensor 5 installed on the vibration conductor 3 and detecting the vibration propagated through the vibration conductor 3; a first gravel layer 2 composed of the gravel and formed on the vibration conductor 3; and a second gravel layer 4 composed of the gravel and formed below the vibration conductor 3.;COPYRIGHT: (C)2006,JPO&NCIPI