传感器融合
协方差交集
无线传感器网络
实时计算
保险丝(电气)
卡尔曼滤波器
聚变中心
融合
计算机科学
温室
交叉口(航空)
无线
算法
工程类
人工智能
扩展卡尔曼滤波器
电信
电气工程
计算机网络
航空航天工程
认知无线电
园艺
哲学
生物
语言学
作者
Sibo Xia,Xinyuan Nan,Xin Cai,Xumeng Lu
标识
DOI:10.1016/j.compag.2021.106576
摘要
In intelligent greenhouses, wireless sensor networks with uneven temperature distribution and low collection efficiency may lead to poor monitoring effects in real time. To improve the performance of the temperature monitoring system in intelligent greenhouses, a real-time fusion strategy for a hierarchical wireless sensor network (WSN) is proposed. The designed WSN has three layers. In the bottom, sensors collect and preprocess the temperature data of the greenhouse by an improved unscented Kalman filter. In the middle layer, each cluster-head sensor, as a local fusion center, is used to fuse the data collected from the bottom sensors by a parallel inverse covariance intersection fusion algorithm. In the top, a global fusion center is utilized to fuse the temperature data from the middle layer to reflect the global temperature of the greenhouse by an improved extreme learning machine algorithm. The designed algorithm applied in each layer ensures the efficiency and accuracy of data fusion in real time. Simulation results show that the designed fusion strategy effectively improves the fusion accuracy and realizes the real-time fusion. The performance of the designed temperature monitoring system is greatly improved.
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