ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

The use of unmanned helicopters (UH) and other aviation aircraft for supplementary pollination in hybrid rice is one of the most important ways to solve the mechanization of the hybrid rice seed production. In order to conduct multi-point, multi-direction, mobile, and real-time measurement for wind field parameters on rice canopy which formed by UHs rotor airflow, a wireless wind speed sensor network system (WWSSN) was developed, and relevant reliability analysis and tests were also presented. The WWSSN consists of three modules, several wireless wind speed sensors (WWSS), the flight global position system (FGPS), and the intelligent control focus node (ICFN). The test results showed that the average relative error of wind speed measuring is not more than 3.52%, the absolute maximum error is 0.2m/s, and no significant difference among each WWSS to reliably and accurately measure the wind velocity field corresponding values, the coefficient of variation is not greater than 4.41%. The fixing brackets can help to install the WWSS in paddy field, and the topological structure between ICFN and WWSSs is a star topology, it is easily to realize multi-point, multi-direction, mobile, and real-time measurement for wind field parameters on rice canopy which formed by UHs rotor airflow. In addition, the FGPS based on high accuracy RTK GPS can also provide the pose information, which is helpful to the comprehensive analysis of the influencing factors in supplementary pollination using UH. It is indicated that the presented WWSSN can provide reliable and accurate wind field parameters measurement on rice canopy which formed by UHs rotor airflow. It can be used as an effective tool for the operation parameters optimization for supplementary pollination in hybrid rice breeding using UHs.