Wireless Sensor Network Achieved by Automatic Positioning System Node

In application of wireless sensor network, the position information of sensor node is crucial within life cycle in the whole network. In order to design algorithm of node positioning with high-efficiency, high-precision and low-consumption, this paper puts forward using the encryption algorithm of space control node originally applied in field of engineering measurement, by using SDI algorithm ( space and distance intersection algorithm) as three-dimensional position algorithm used in system to achieve threedimensional automatic positioning calculation of distributed nodes. Test proves that this kind of algorithm has better positioning nature and higher precision; it is used as threedimensional positioning because it has good engineering application value.