Wireless sensor node ranging and positioning methods for tunnels

A wireless sensor and ranging method technology, applied in the field of wireless sensor networks, can solve the problems of complex data processing, unsuitable wireless sensor node positioning in tunnels, and high equipment costs
CN102608570AInactive Publication Date: 2012-07-25HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2012-07-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a wireless sensor node ranging method for tunnels. The method measures the time of message transmission between two nodes to acquire the measured distance between the nodes and reasonably screen measured distances, thus effectively overcoming the affection of the multipath effect, attenuation, distortion and the like of radio signals on the ranging precision in a tunnel environment, and the method has a good inhibition effect on transient faults occurring in the process of ranging. The invention also provides a sensor node positioning method, the measured distance between a mobile node and a reference node is first acquired according to the ranging method, the iteration method is then adopted to calculate the coordinates of the mobile node, the method is added with the process of iterative refinement on the basis of maximum likelihood estimate, and thereby the precision of mobile node positioning calculation is greatly increased.
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Description

technical field

[0001] The invention relates to the technical field of wireless sensor networks, in particular to a method for measuring and locating a tunnel of a wireless sensor network based on radio frequency transmission time. Background technique

[0002] Tunnel refers to a railway or highway tunnel under construction, or a coal mining tunnel. Its common characteristics are that the structure is a long and narrow space and is constantly changing; the power and communication infrastructure is incomplete, and there is no reliable wired or wireless communication link; ventilation and drainage facilities are not prepared, and the air humidity is high; construction personnel and The construction equipment is dense and the construction environment is harsh. my country is a large coal mining country and is in a period of rapid development of infrastructure. Construction safety accidents in the above-mentioned tunnels often occur, resulting in significant personnel and proper...

Claims

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