Multi-sensor Data Fusion Based on Consistency Test and Sliding Window Variance Weighted Algorithm in Sensor Networks

Jian Shu1, 2, Ming Hong2, 3, Wei Zheng1, 3, Li-Min Sun2, 4 and Xu Ge1, 3

  1. Internet of Things Technology Institute, Nanchang Hang Kong University
    Nanchang China
    shujian@jxjt.gov.cn
  2. School of Software, Nanchang Hang Kong University
    Nanchang China
    zhengwei_nchu@126.com
  3. School of Information Engineering, Nanchang Hang Kong University
    Nanchang China
    hong19860320@hotmail.com
  4. Institute of Software Chinese Academy of Science
    Nanchang China
    sunlimin@is.iscas.ac.cn

Abstract

In order to solve the problem that the accuracy of sensor data is reducing due to zero offset and the stability is decreasing in wireless sensor networks, a novel algorithm is proposed based on consistency test and sliding-windowed variance weighted. The internal noise is considered to be the main factor of the problem in this paper. And we can use consistency test method to diagnose whether the mean of sensor data is offset. So the abnormal data is amended or removed. Then, the result of fused data can be calculated by using sliding window variance weighted algorithm according to normal and amended data. Simulation results show that the misdiagnosis rate of the abnormal data can be reduced to 3% by using improved consistency test with the threshold set to [0.05, 0.15], so the abnormal sensor data can be diagnosed more accurately and the stability can be increased. The accuracy of the fused data can be improved effectively when the window length is set to 2. Under the condition that the abnormal sensor data has been amended or removed, the proposed algorithm has better performances on precision compared with other existing algorithms.

Key words

wireless sensor networks, data fusion, consistency test, sliding window, variance weighted

Digital Object Identifier (DOI)

https://doi.org/10.2298/CSIS110617004S

Publication information

Volume 10, Issue 1 (Januar 2013)
Year of Publication: 2013
ISSN: 1820-0214 (Print) 2406-1018 (Online)
Publisher: ComSIS Consortium

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How to cite

Shu, J., Hong, M., Zheng, W., Sun, L., Ge, X.: Multi-sensor Data Fusion Based on Consistency Test and Sliding Window Variance Weighted Algorithm in Sensor Networks. Computer Science and Information Systems, Vol. 10, No. 1, 197-214. (2013)