موقعیت یابی فناوری داخلی ZigBee
Abstract
1-Preface
2-Introduction to RSSI Positioning Algorithm
3-Improved Model Algorithm
4-Triangulation Method of Distance Measurement
5-Platform based on CC2431
6-Experimental test
7-Conclusion
Acknowledgement
References
Abstract
Because in the indoor environment, GPS and other navigation satellite signals can not penetrate the building well, making the satellite signal weaker and unable to use the satellite for positioning. A received signal strength indication (RSSI) -based wireless ZigBee sensor network is proposed based on ranging and indoor positioning technology. The module CC2431 is used as the core chip to design ZigBee nodes which are used to form a ZigBee positioning network. According to the receiver RSSI model, the distance d is estimated between the unknown node and the reference node. By introducing the average filtering model and the Gaussian filtering model, then the measured formula of RSSI ranging is obtained, which is RSSI=-34.3-24×lgd. The field test experiment shows that under the condition of quickly locate and low accuracy, the proposed method does not require additional hardware and software, meanwhile is simple to be implemented.
Preface
ZigBee is an emerging wireless network technology that has developed rapidly in recent years and is widely used for indoor navigation and positioning. As a short-range wireless communication technology, ZigBee has the advantages of high communication efficiency, low power consumption, low cost and high security. In this paper, the RSSI algorithm is used to measure the received reference node signal strength1-3, and the measured data is averaged by the model and the Gaussian filter model to estimate the distance between the nodes4-5. Some positioning algorithms calculate the coordinate position of the node6. As a supplementary technology based on the wireless communication, a relatively coarse positioning function can be realized, which can be used when some positioning requirements are not too high.