Patent ID: 7837108

Claim:
A sensor device management system that manages a plurality of sensor devices that acquires individual identification information from individual identifiers, said sensor device management system comprising: a data-acquiring portion that acquires said individual identification information from said plurality of sensor devices; a storage portion that stores primary information that is produced by associating said sensor devices with said individual identification information acquired by said sensor devices; an extracting portion constructed so that said sensor devices that satisfy a predetermined condition can be extracted as a group on the basis of said identification information acquired by said plurality of sensor devices of said primary information; and a monitoring portion that monitors said sensor devices to check if the sensor devices belonging to said extracted group satisfy said predetermined condition; wherein said predetermined condition is the condition in which the overlap rate of a plurality of pieces of said individual identification information associated with said plurality of sensor devices of said primary information is a predetermined value or more; and wherein said overlap rate is the ratio of the product set of said individual identification information associated with said plurality of sensor devices to the union of sets of said individual identification information associated with said plurality of sensor devices.