Wireless sensor network target locating method and locating system without need of node self-localization

Abstract

The invention relates to a wireless sensor network target locating method and a locating system without the need of node self-localization. The locating method includes a first step of establishing an electronic map in a target locating area, and establishing an electronic map coordinate system, a second step of setting a plurality of wireless sensor nodes, and confirming the coordinate values and positions of the wireless sensor nodes in the electronic map, a third step of enabling the wireless sensor nodes to measure RSSI values of target nodes in a target node broadcast data package, a fourth step of obtaining coordinates of the target nodes in the electronic map according to the coordinate values of the wireless sensor nodes used for measuring the RSSI values of the target nodes in the electronic map and the obtained RSSI values of the target nodes, and obtaining the locating positions of the target nodes in the electronic map according to the coordinates of the target nodes. By means of the electronic map, the wireless sensor network target locating method and the locating system without the need of the node self-localization achieve target locating under the condition of not carrying out node self-localization, improve locating precision, reduces implementing difficulty, and enlarge the locating application scope.

Description

technical field

[0001] The invention relates to a wireless sensor network target positioning method and system, in particular to a wireless sensor network target positioning method and system free of node self-positioning. Background technique

[0002] Wireless sensor network is a new type of networked sensing technology that integrates sensing, computing and communication technologies that was born in recent years. Target positioning is one of the main applications of wireless sensor network. The target location is estimated by using network nodes to measure and process target signals cooperatively. One of the important prerequisites for target positioning is to first determine the coordinates of the sensor nodes. The conventional idea is to estimate the node coordinates through a series of information interactions and processing processes between nodes after deploying the sensor nodes at the location site, and then based on the node coordinates and measurement data to calc...

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