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Journal of Sensors
Volume 2016 (2016), Article ID 8914769, 9 pages
http://dx.doi.org/10.1155/2016/8914769
Research Article

A Method for Selecting Optimal Number of Sensors to Improve the Credibility

Liaoning IC Technology Key Laboratory, School of Electronics Science & Technology, Dalian University of Technology, Dalian, Liaoning 116023, China

Received 19 June 2015; Revised 25 September 2015; Accepted 29 September 2015

Academic Editor: Maria Luz Rodríguez-Méndez

Copyright © 2016 Yi Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

With the development of sensors, it is possible to embed many sensors within a certain space, which makes the monitor and alarm system with multisensor possible. There are two important parameters in a monitor and alarm system, namely, the false alarm rate and the missed alarm rate. In this work, a method for selecting optimal number of sensors in the sensor array is presented to improve the credibility. The influence factors of the weights and the false alarm rate and the missed alarm rate of one sensor and total number of sensors are discussed. An experimental setup was developed. The monitoring methods of common strategies and the proposed optimal number of sensors strategy are compared graphically by the receiver operating characteristic curves and the area under receiver operating characteristic curve values. The receiver operating characteristic curves graphically prove that the optimal number of sensors’ method presents the best performance, and it is shown that the optimal number of sensors’ method has the highest area under receiver operating characteristic value (0.9631). This method may aid future users of the monitor and alarm system by providing an optimal number of sensors strategy for high credibility.