耕地质量低空遥感-地面传感双重采集系统研究

Low altitude remote sensing-ground sensing double collection system for farmland quality

【目的】将无人机(UAV)低空遥感检测系统与无人机-无线传感器网络(UAV-WSN)集成,实现通过一套系统进行低空遥感监测和地面长期监测的双重监测,为耕地质量的空间和时间变化提供监测数据。【方法】本研究探讨了现有UAV-WSN系统无法实现双重采集的问题,设计了一套用于耕地质量监测的低空遥感-地面传感双重采集系统,提出一套双重采集的工作流程,以及提升性能的基于航线的LEACH算法。仿真分析试验中调整UAV飞行高度和地面节点密度,以比较双重采集系统和UAV-WSN系统总飞行时间的不同。【结果】双重采集系统1次飞行同时采集2种监测数据,无需完成低空遥感监测数据采集后再次走遍所有地面节点,在低空遥感地面图像分辨率变化的情况下,总飞行时间比UAV-WSN系统快165 s;双重采集系统根据无人机航线和地面节点位置进行调整,在地块内节点数量变化的情况下,总飞行时间基本不变,比UAV-WSN系统快129~194 s。【结论】双重采集系统能够减少现场采样所需的总工作时长,降低采样工作的复杂程度,提升耕地质量监测的效率。

【Objective】To integrate unmanned aerial vehicle(UAV)low altitude remote sensing system and unmanned aerial vehicle-wireless sensor network(UAV-WSN),realize double monitoring of low altitude remote sensing monitoring and ground long term monitoring through one system,and provide monitoring data for space and time changes of farmland quality.【Method】The study explored the problem that current UAV-WSN system cann’t collect long-term monitoring data from sensor nodes on the ground and low altitude remote sensing data from UAV’s sensor at the same time.A low altitude remote sensing and ground sensing double collection method and system for farmland quality monitoring was designed,and the key steps and algorithm for integrating these two monitoring systems were studied.Adjusting UAV flying altitude and ground node density in simulation analysis experiments to compare total flying time differences of double collection system and UAV-WSN system.【Result】Double collection system could collect two kinds of data in one flight,UAV don’t need to fly over every ground sensor node again after collecting low altitude remote sensing data.When the ground image resolution was changed,the total flying time of double collection system was 165 s faster than UAV-WSN system.Double collection system could adjust based on UAV flight path and ground sensor node location.When the number of sensor nodes was changed,the total flying time was not changed and 129-194 s faster than UAV-WSN system.【Conclusion】Double collection system can reduce total operating time and complexity of sampling,and increase the efficiency of farmland quality monitoring.