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Design and Development of Large Electric Curtain Control System for Time Controlled
Shuo Cheng(정석),Yong Taek Chung(정용택),Xiang Fan Piao(박상범) 한국기계가공학회 2019 한국기계가공학회지 Vol.18 No.3
The purpose of this paper is to design a curtain control system for centralized management of large curtains, which includes curtain structure, electric curtain controller, communication system, user interface and remote control. Curtain structure is designed to avoid using limit switch. The system is based on microprocessor, determined the stop position and complete running time of electric curtain through time control, and achieved remote control of curtain opening and closing through wired and wireless communication modes. By establishment of a mathematical model to calculate the inertia compensation time of the electric curtain, the electric curtain can be stopped ahead of time, and the curtain can be completely closed by the inertia. The result of test experiment of 32 electric curtain controllers shows the communication success rate reached 100%.
Efficient Cluster Radius and Transmission Ranges in Corona-based Wireless Sensor Networks
( Wei Kuang Lai ),( Chung-shuo Fan ),( Chin-shiuh Shieh ) 한국인터넷정보학회 2014 KSII Transactions on Internet and Information Syst Vol.8 No.4
In wireless sensor networks (WSNs), hierarchical clustering is an efficient approach for lower energy consumption and extended network lifetime. In cluster-based multi-hop communications, a cluster head (CH) closer to the sink is loaded heavier than those CHs farther away from the sink. In order to balance the energy consumption among CHs, we development a novel cluster-based routing protocol for corona-structured wireless sensor networks. Based on the relaying traffic of each CH conveys, adequate radius for each corona can be determined through nearly balanced energy depletion analysis, which leads to balanced energy consumption among CHs. Simulation results demonstrate that our clustering approach effectively improves the network lifetime, residual energy and reduces the number of CH rotations in comparison with the MLCRA protocols.