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Sensors 2018, 18(11), 3851; https://doi.org/10.3390/s18113851

Data Fusion Using Improved Support Degree Function in Aquaculture Wireless Sensor Networks

1
School of IoT Engineering, Jiangnan University, Wuxi 214122, China
2
Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
3
School of IoT Engineering, Jiangsu Vocational College of Information Technology, Wuxi 214153, China
*
Author to whom correspondence should be addressed.
Received: 12 October 2018 / Revised: 4 November 2018 / Accepted: 6 November 2018 / Published: 9 November 2018
(This article belongs to the Special Issue Fog Computing for Sensor and Cloud System)
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Abstract

For monitoring the aquaculture parameters in pond with wireless sensor networks (WSN), high accuracy of fault detection and high precision of error correction are essential. However, collecting accurate data from WSN to server or cloud is a bottleneck because of the data faults of WSN, especially in aquaculture applications, limits their further development. When the data fault occurs, data fusion mechanism can help to obtain corrected data to replace abnormal one. In this paper, we propose a data fusion method using a novel function that is Dynamic Time Warping time series strategy improved support degree (DTWS-ISD) for enhancing data quality, which employs a Dynamic Time Warping (DTW) time series segmentation strategy to the improved support degree (ISD) function. We use the DTW distance to replace Euclidean distance, which can explore the continuity and fuzziness of data streams, and the time series segmentation strategy is adopted to reduce the computation dimension of DTW algorithm. Unlike Gauss support function, ISD function obtains mutual support degree of sensors without the exponent calculation. Several experiments were finished to evaluate the accuracy and efficiency of DTWS-ISD with different performance metrics. The experimental results demonstrated that DTWS-ISD achieved better fusion precision than three existing functions in a real-world WSN water quality monitoring application. View Full-Text
Keywords: wireless sensor networks; data fusion; support degree function; dynamic time warping; sensor-cloud; water quality monitoring wireless sensor networks; data fusion; support degree function; dynamic time warping; sensor-cloud; water quality monitoring
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Shi, P.; Li, G.; Yuan, Y.; Kuang, L. Data Fusion Using Improved Support Degree Function in Aquaculture Wireless Sensor Networks. Sensors 2018, 18, 3851.

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