A Compression Algorithm in Wireless Sensor Networks of Bearing Monitoring

被引：0

作者：

Zheng Bin ^{[1
]}

Meng Qingfeng ^{[1
]}

Wang Nan ^{[1
]}

Li Zhi ^{[2
]}

机构：

[1] Xi An Jiao Tong Univ, Theory Lubricat & Bearing Inst, Xian 710049, Peoples R China

[2] Dalian Machine Tool Grp Corp, Dalian 116620, Peoples R China

来源：

9TH INTERNATIONAL CONFERENCE ON DAMAGE ASSESSMENT OF STRUCTURES (DAMAS 2011) | 2011年 / 305卷

基金：

美国国家科学基金会;

关键词：

D O I：

10.1088/1742-6596/305/1/012122

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The energy consumption of wireless sensor networks (WSNs) is always an important problem in the application of wireless sensor networks. This paper proposes a data compression algorithm to reduce amount of data and energy consumption during the data transmission process in the on-line WSNs-based bearing monitoring system. The proposed compression algorithm is based on lifting wavelets, Zerotree coding and Hoffman coding. Among of that, 5/3 lifting wavelets is used for dividing data into different frequency bands to extract signal characteristics. Zerotree coding is applied to calculate the dynamic thresholds to retain the attribute data. The attribute data are then encoded by Hoffman coding to further enhance the compression ratio. In order to validate the algorithm, simulation is carried out by using Matlab. The result of simulation shows that the proposed algorithm is very suitable for the compression of bearing monitoring data. The algorithm has been successfully used in online WSNs-based bearing monitoring system, in which TI DSP TMS320F2812 is used to realize the algorithm.

引用

页数：9

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