Method and system for positioning wireless sensor network

Abstract

The invention discloses a method and a system for positioning a wireless sensor network. The method comprises the following steps that: after a first distance between a node to be positioned and an anchor node is calculated, a preset quantity of anchor node sub-combinations are constructed; after a second distance between the anchor node and the node to be positioned is calculated, the anchor node sub-combination which has a smallest deviation sum and the deviation sum in an allowed range is selected as a destination anchor node sub-combination; and the final position coordinates of the node to be positioned are calculated through the destination anchor node sub-combination. By the method and the system provided by the invention, the anchor node sub-combination with the smallest deviation can be selected, and measurement data with large errors can be effectively eliminated, so the positioning accuracy of the node to be positioned can be effectively improved.

Description

technical field [0001] The invention relates to the field of sensor networks, in particular to a wireless sensor network positioning method and system. Background technique [0002] Wireless Sensor Networks (WSN, Wireless Sensor Networks), referred to as the sensor network, is a computer network composed of many spatially distributed automatic devices. In the sensor network WSN, there are a large number of sensor nodes, and each sensor The nodes have the functions of sensing, communication, and calculation, and are used to monitor the physical or environmental conditions of different locations, and realize the monitoring of parameters such as temperature, humidity, pressure, and strain. However, during the monitoring process, if there is no position information corresponding to the monitored information, the monitored information will become useless information. Therefore, it is very important to determine the location of nodes in the network, which is the basis for the lar...

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Problems solved by technology

[0004] However, the inventor found through research that in the positioning method in the prior art, in the process of calculating the distance according to the received signal sent by the anchor node, the calculation process of the actual position coordinates of the node to be positioned is based on the distance between the anchor node and the node to be positioned The distance is calculated, but due to the complex application environment, there is a large error in the calculation of the distance between the anchor node and the node to be located, so the actual position coordinates of the node to be located will also have a large error in the final calculation. This leads to the low accuracy of the positioning method of the wireless sensor network WSN in the complex application environment.

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