基于超声和无线组网的超高树障在线监测装置

A Transmission Line Monitoring Device Based on Ultrasonic and Wireless Networking Technologies

设计了一种基于超声波技术和无线网络技术的输电线走廊超高树障的在线监控报警装置。该装置的超声测距传感器悬挂在输电线上,使用40kHz的超声波探测输电线区域内超高树障等异物的距离;依靠互感方式将输电线周围的电磁能量转换为电能实现供电;监控现场划分为多个小区,小区内各探测点利用ZigBee进行自组网,小区与远程控制中心的信息交换依靠通用分组无线业务(GPRS)完成,各小区的地理位置和时间信息取自全球定位系统(GPS)。为得到输电线与树木之间距离的准确估计值,利用统计方法对测距值进行了去噪处理,给出了置信度为95%的估计结果。样机的相关实验表明,设计的在线监测装置达到了预期效果。

Based on ultrasonic technology and wireless network technology,a transmission line monitoring and alarming device is developed.The ultrasonic ceramic transducer can be hung on the transmission line and it uses 40kHz ultrasound to detect the distance between the transmission line and foreign objects such as a tree barrier.The device is powered by energy conversion of the electromagnetic energy around the power line through the mutual inductance.In the system,there are several local areas in which one coordinator and many routers are installed.ZigBee ad-hoc network is used to provide communication link connecting every probe point within each local area.The information collected by the coordinator includes the time and the geographic information taken from the global positioning system（GPS）,as well as the distance between transmission line and foreign body in this location,it is then sent out by general packet radio service（GPRS）.In order to obtain an accurate estimation,statistical method is used for de-noising.The estimate result has a confidence interval with up to 95%.The designed line monitoring device achieves the desired results through experiments.