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Sensors 2009, 9(4), 2836-2850; doi:10.3390/s90402836

Anchor-Free Localization Method for Mobile Targets in Coal Mine Wireless Sensor Networks

1
State Key Laboratory of Intelligent Technology and Systems, Tsinghua National Laboratory for Information Science and Technology, Department of Computer Science and Technology, Tsinghua University, Beijing 100084, P.R. China
2
Institute of Scientific and Technical Information of China, Beijing 100038, P.R. China
*
Authors to whom correspondence should be addressed.
Received: 13 March 2009 / Revised: 15 April 2009 / Accepted: 20 April 2009 / Published: 21 April 2009
(This article belongs to the Special Issue Wireless Sensor Technologies and Applications)
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Abstract

Severe natural conditions and complex terrain make it difficult to apply precise localization in underground mines. In this paper, an anchor-free localization method for mobile targets is proposed based on non-metric multi-dimensional scaling (Multi-dimensional Scaling: MDS) and rank sequence. Firstly, a coal mine wireless sensor network is constructed in underground mines based on the ZigBee technology. Then a non-metric MDS algorithm is imported to estimate the reference nodes’ location. Finally, an improved sequence-based localization algorithm is presented to complete precise localization for mobile targets. The proposed method is tested through simulations with 100 nodes, outdoor experiments with 15 ZigBee physical nodes, and the experiments in the mine gas explosion laboratory with 12 ZigBee nodes. Experimental results show that our method has better localization accuracy and is more robust in underground mines.
Keywords: Wireless sensor networks; Multi-dimensional scaling; Received signal strength; Rank sequence Wireless sensor networks; Multi-dimensional scaling; Received signal strength; Rank sequence
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Pei, Z.; Deng, Z.; Xu, S.; Xu, X. Anchor-Free Localization Method for Mobile Targets in Coal Mine Wireless Sensor Networks. Sensors 2009, 9, 2836-2850.

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