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Conflict data fusion method based on evidence distance and uncertainty

A data fusion and certainty technology, applied in character and pattern recognition, instruments, computer parts, etc., can solve problems such as high data conflict

Inactive Publication Date: 2018-04-27
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] However, since multi-source data fusion is the processing of data from multiple data sources, the data collected by wireless sensor networks may be highly conflicting with the data collected by other sensors

Method used

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  • Conflict data fusion method based on evidence distance and uncertainty
  • Conflict data fusion method based on evidence distance and uncertainty
  • Conflict data fusion method based on evidence distance and uncertainty

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Embodiment Construction

[0060] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0061] Step 1): Calculate the evidence distance;

[0062] The relative distance represents the degree of mutual support between evidence bodies. Among them, the most widely used and highly recognized method is the evidence distance representation method proposed by Jousselme. Specific steps are as follows.

[0063] Step 1-1): Two evidence bodies m 1 ( ) and m 2 (·) the distance d between BOE (m 1 ,m 2 ) is defined as follows:

[0064]

[0065] in, and Respectively represent the body of evidence m 1 ( ) and m 2 (·) in vector form. is 2 Θ ×2 Θ The matrix of is calculated as:

[0066]

[0067] Step 1-2): When there are multiple evidences, the distance between any two evidence bodies can be expressed in the form of evidence matrix DM, which is defined as follows:

[0068]

[0069] Step 1-3): The larger the distance b...

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Abstract

The invention relates to a conflict data fusion method based on an evidence distance and an uncertainty, which belongs to the technical field of wireless sensors. The conflict data fusion method considers a mutual support degree between evidence and the uncertainty of the evidence itself at the same time, uses an idea of weighted average of the evidence for reference, and proposes a conflict datafusion algorithm based on the evidence distance and the uncertainty. The conflict data fusion method comprises the steps of: firstly, calculating a relative distance between the evidence by means of the evidence distance, measuring conflict between the evidence, and dividing the evidence into two types of credible evidence and untrustworthy evidence; secondly, quantifying the uncertainty of the evidence by utilizing credibility entropy, and allocating corresponding weights to the two types of evidence; thirdly, correcting basic credibility allocation of the evidence; and finally, calculating to obtain a final fusion result by utilizing a Dempster fusion rule. The conflict data fusion algorithm based on the evidence distance and the uncertainty provided by the invention can effectively solve the data conflict problem, and obtain more precise fusion results.

Description

technical field [0001] The invention belongs to the technical field of wireless sensors and relates to a conflict data fusion method based on evidence distance and uncertainty. Background technique [0002] Wireless Sensor Networks (Wireless Sensor Networks, WSN) is a new field composed of sensor technology, data perception technology and network communication technology. After the analysis and processing, the locally processed data is sent to the decision center for processing and judgment. The sensor network is considered to be one of the most important technologies in recent years. It builds a bridge between the real world and the virtual world, and brings great changes to data perception, acquisition and data processing technology. It is widely used in military fields, environmental Surveillance, medical and health, disaster monitoring and other fields. [0003] As the number and types of sensors deployed in the sensor network are also increasing rapidly, the amount of...

Claims

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Application Information

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IPC IPC(8): G06K9/62
CPCG06F18/22G06F18/25G06F18/257
Inventor 陶洋梅思梦李朋杨飞跃代建建章思青邓行谢金辉许湘扬
Owner CHONGQING UNIV OF POSTS & TELECOMM
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