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

When the traditional maize seeder works in the field, the power of seed metering device comes from ground steel. Aiming at the problem that the field conditions are so complicated that the ground steel will skid easily, then the miss index will be increased, an electronic maize sowing control system was designed. The police traffic radar collected the sowing operation speed when the sowing was started, then the control system will calculate the seed metering device rotational speed combined with the theoretical particle distance. The rotary encoder collected the seed metering device rotational speed, then the controller would process speed based on control strategy and obtained the last speed. The optimal process of control strategy can improve the accuracy. The results of the field test showed that when the electronic control seed metering device was working in the field, the average qualified index was 92.40%, which was increased by 3.63 percentage points compared with the traditional sowing. The average miss index was 4.82% and it was reduced by 2.04 percentage points compared with the traditional sowing. The variability of seedspaces was less than 4.20% and the sowing effects were much more than the national standard. When the speed of sowing was more than 10km/h, the effects was worse than other cases, therefore some improvement on the structure to improve the accuracy. The design of the electronic control maize seed metering device provided some definite reference for study of sowing control system. 