Application of UAV radar to survey of ice thickness and ice structure
LIU Hui1, JI Honglan1, LUO Hongchun1, GAO Guoming2, ZHANG Baosen2, MOU Xianyou1*
1. College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China; 2. Yellow River Institute of Hydraulic Research, Yellow River Conservancy Commission, Zhengzhou, Henan 450003, China
Abstract：In order to improve the measurement efficiency of ice thickness in the Yellow River, the UAV radar was used to detect the ice thickness in the Shisifenzi bend of the Yellow River in Inner Mongolia, the results were compared with the measured ice thickness, and the characteristics of the typical radar images of the ice layer were analyzed as well. The results showed that the ice thickness of the Shensifenzi bend was uneven, the ice thickness was between 40 and 80 cm, overall, longitudinally, the ice thickness decreased, the minimum thickness was located at the apex of the bend, the ice thickness on the concave bank was larger than that on the convex bank, the ice thickness of open water area presented a small-large-small trend, and the ice thickness near the water surface was smallest. For the measurement effect, the vertical frozen area was general, the result of radar measurement was greater than that of manual measurement, the error was about 10%, the flat frozen ice sheet was fine, and the error was less than 5%. The radar measurement results and the manual measurement results had a strong consistency on the trend of the ice thickness, and the propagation velocity of radar wave in the ice layer was between 15—17 cm /ns. Radar images could reflect the structure, position and direction of the ice cracks in ice layer, and the radar images of flat frozen ice sheet and vertical frozen ice sheet were quite different. The UAV radar can measure the ice thickness quickly, which greatly improves the test efficiency of ice thickness in small areas.It provides a technical reference for the analysis of the freezing-thawing process of the ice and the structure under the ice in the Yellow River, which is an ideal method for ice detection.
刘辉,冀鸿兰,罗红春,郜国明,张宝森,牟献友*. 无人机载雷达在冰厚及冰层结构探测中的应用[J]. 排灌机械工程学报, 2021, 39(6): 630-636.
LIU Hui,JI Honglan,LUO Hongchun,GAO Guoming,ZHANG Baosen,MOU Xianyou*. Application of UAV radar to survey of ice thickness and ice structure. Journal of Drainage and Irrigation Machinery Engin, 2021, 39(6): 630-636.
