| 摘要 |
The invention relates to a system for locating minors in large retail facilities. The invention enables the use of low-power-consumption wireless networks in order to implement a system that provides a warning when a minor wanders off in a large indoor or outdoor retail facility. The invention includes an installed infrastructure formed by a series of fixed nodes and a set of moving nodes to be located. The invention also includes another set of terminals worn by the adults in charge and intended to receive lost child notifications. Inter-node communication complies with a Zigbee-type standard short-range, low-power-consumption protocol. Each node to be located transmits the identifier thereof and information for locating same. Said information is transmitted using a multi-hop routing algorithm to the central module via the node acting as a gateway. If the central module stops receiving packets containing the identifier of any moving node, said node is considered to be lost and a notification is transmitted to the terminal of the adult in charge.
|
