Photovoltaic (PV) systems have attracted increasing attention in last years as well as Wireless Sensor Networks (WSNs), which have been used in many application fields. In PV plants, especially in ground installations...Photovoltaic (PV) systems have attracted increasing attention in last years as well as Wireless Sensor Networks (WSNs), which have been used in many application fields. In PV plants, especially in ground installations, a lot of thefts and damages occur due to the still high cost of the modules. A new experimental WSN ad-hoc has been designed to be an anti-theft alarm system. Each node of the network is directly installed under each PV string and it is equipped with an accelerometer sensor capable to detect a minimum displacement of the panel from its steady position. The WSN presents a star topology: a master node cyclically interrogates the slave nodes through RF link. It collects all the nodes responses and communicates though a RS-232 interface with a control PC checking the network status. When a slave node detects an alarm, continuous messages are sent to the control PC which turns on all the alarm signaling systems. The control PC is equipped with an open source operative system and software and provides for SMS, e-mail and sound-light signaling in case of alarm. It also communicates with a remote server where all the WSN information is stored. A first low cost experimental WSN has been already installed and it is working properly.展开更多
皮带运输机在煤矿生产中一直承担着煤炭运输的重要任务,其安全稳定运行是保障煤矿安全生产的前提。但是,皮带运输机在实际使用过程中会发生各种各样的故障,严重时会造成皮带断裂进而导致设备停转,给煤矿生产带来很大损失。因此,对发生...皮带运输机在煤矿生产中一直承担着煤炭运输的重要任务,其安全稳定运行是保障煤矿安全生产的前提。但是,皮带运输机在实际使用过程中会发生各种各样的故障,严重时会造成皮带断裂进而导致设备停转,给煤矿生产带来很大损失。因此,对发生断带事故的原因进行分析,探讨断带保护技术应用及安防装置设计。根据分析结论和实际情况,设计了皮带运输机断带安防装置,提出了一种基于ARM的PLC+DCS+GSM (Programmable Logic Controller+Distributed Control System+Global System for Mobile Communications,可编程逻辑控制器+分散控制系统+全球移动通信系统)综合安防系统设计方案,并对该系统进行了可行性分析。展开更多
文摘Photovoltaic (PV) systems have attracted increasing attention in last years as well as Wireless Sensor Networks (WSNs), which have been used in many application fields. In PV plants, especially in ground installations, a lot of thefts and damages occur due to the still high cost of the modules. A new experimental WSN ad-hoc has been designed to be an anti-theft alarm system. Each node of the network is directly installed under each PV string and it is equipped with an accelerometer sensor capable to detect a minimum displacement of the panel from its steady position. The WSN presents a star topology: a master node cyclically interrogates the slave nodes through RF link. It collects all the nodes responses and communicates though a RS-232 interface with a control PC checking the network status. When a slave node detects an alarm, continuous messages are sent to the control PC which turns on all the alarm signaling systems. The control PC is equipped with an open source operative system and software and provides for SMS, e-mail and sound-light signaling in case of alarm. It also communicates with a remote server where all the WSN information is stored. A first low cost experimental WSN has been already installed and it is working properly.
文摘皮带运输机在煤矿生产中一直承担着煤炭运输的重要任务,其安全稳定运行是保障煤矿安全生产的前提。但是,皮带运输机在实际使用过程中会发生各种各样的故障,严重时会造成皮带断裂进而导致设备停转,给煤矿生产带来很大损失。因此,对发生断带事故的原因进行分析,探讨断带保护技术应用及安防装置设计。根据分析结论和实际情况,设计了皮带运输机断带安防装置,提出了一种基于ARM的PLC+DCS+GSM (Programmable Logic Controller+Distributed Control System+Global System for Mobile Communications,可编程逻辑控制器+分散控制系统+全球移动通信系统)综合安防系统设计方案,并对该系统进行了可行性分析。
