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Wireless sensor network sound source locating method

A wireless sensor and sound source localization technology, applied in positioning, radio wave measurement systems, instruments, etc., can solve problems such as not being able to find the optimal solution

Inactive Publication Date: 2014-12-17
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

But as the search area shrinks, the real solution may fall outside the shrinking area, so the algorithm cannot find the optimal solution

Method used

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  • Wireless sensor network sound source locating method
  • Wireless sensor network sound source locating method
  • Wireless sensor network sound source locating method

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Embodiment Construction

[0050] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0051] The wireless sensor network sound source localization method of the present invention is a kind of improved quantum particle swarm algorithm based on culture, such as figure 1 Shown, the inventive method is specifically as follows:

[0052] The invention uses the maximum likelihood estimation algorithm to transform the positioning problem into a solution problem of nonlinear equations, and then proposes a culture-improved quantum particle swarm optimization algorithm (CMQPSO) to solve the nonlinear optimization problem. First, on the basis of quantum particle swarm optimization (QPSO), combined with the idea of ​​adaptive mutation and RSNTO algorithm, an improved quantum particle swarm optimization algorithm (MQPSO) is proposed. Then, in order to further improve the global search ability of the algorithm and improve the calculation accuracy, the cultural The d...

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Abstract

The invention provides a wireless sensor network sound source locating method, and belongs to the field of sound source location. According to the method, the maximum likelihood estimation algorithm is utilized to enable a sound source locating problem to be transferred into a nonlinearity equation set, and then solution for the nonlinearity equation set is conducted to obtain the optimal solution which is the position of a sound source. The method includes step one, a likelihood function based on energy sound source location is constructed according to a sound energy attenuation model and the maximum likelihood estimation algorithm; step two, solution for the logarithm likelihood function of an energy vector quantity Y is conducted to obtain optimal solution; and step three, double evolutionary mechanism of cultural algorithm is utilized to improve executing efficiency. The method resolves the problem of nonlinearity optimization of sound source location, and improves locating accuracy.

Description

technical field [0001] The invention belongs to the field of sound source localization, and in particular relates to a sound source localization method of a wireless sensor network. Background technique [0002] A wireless sensor network (Wireless Sensor Network, WSN) is a multi-hop self-organizing network composed of a large number of small-volume, low-cost sensor nodes that integrate sensing, data collection, processing, and wireless communication units. In many application fields of wireless sensor networks, sound source localization is one of the important aspects, which uses the sound source information detected by the sensor nodes in the network to estimate the position of the sound source at a certain moment. [0003] The positioning based on sound energy often adopts the maximum likelihood estimation method (ML, MaximumLikehood) with high positioning accuracy, that is, based on the sound signal model, the maximum likelihood method is used to convert the sound source ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/18
Inventor 孙学梅刘玉柱
Owner TIANJIN POLYTECHNIC UNIV
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