To provide an opening and closing detection system for detecting unauthorized opening or unauthorized entry in simple configurations without using any seal whose non-destructive peeling is possible.
A detection part is mounted on the cover side of a case to be monitored, and a notification part is stored at the main body side, and it is connected to a server, and monitor software is made to permanently reside in the server, and periodic communication is operated with the notification part, and the presence/absence of opening is monitored in 24 hours. The detection part is configured of a resistance, and the both terminals of the resistance are connected through a contact to the input terminal of the notification part. The notification part incorporates an A/D converter, a CPU, a memory, a communication controller and a warning part, and the signal voltage of the detection part is converted into a digital value by an A/D converter, and periodically measured by the CPU, and the measurement value is collated with an initial value stored in the memory, and when the difference is within the range of an error, it is decided that abnormality has been generated. The decision result is transmitted through a communication controller to the server.
Maki Reiko
Kimio Kikutani