STATE MONITORING SYSTEM AND STATE MONITORING METHOD FOR OBJECT AND REGION AROUND THE OBJECT AND CARGO CONTAINER MONITORING SYSTEM

摘要

It is possible to detect a 'motion' of an object in a general-purpose method while maintaining security. A plurality of radio communication devices (communication nodes) (211) are arranged on a wall surface of a container (201). The radio communication devices have a transmission/reception function of a predetermined intensity and constitute a communication network (210). Between each node in this communication network and all the other nodes, communication is established, thereby creating an inter-node network graph matrix. Since this matrix is affected by the space state in the container where an object to be monitored is placed, it is possible to detect even a slight change in the space. In the first working example, the number of relays in each node for performing communication between the nodes is calculated and the network graph matrix between all the nodes is created by using the number of relays as a unit.