深施型液态施肥装置施肥过程高速摄像分析

在行星架转速110 r/min、液泵压力0.3 MPa、分配器阀芯孔直径3 mm和喷肥针孔直径2 mm的条件下，采用高速摄像对扎穴机构扎穴和喷肥工作过程进行拍摄。借助高速摄像及图像处理技术对扎穴和喷肥的运动规律进行分析后得出：喷肥针入土后开始喷肥到离土前停止喷肥的时间为0.1 s、液态肥施肥损失率为0.48%、喷肥针真实运动轨迹宽度变化256 mm和高度变化502 mm。结果表明：扎穴机构扎穴过程和喷肥过程具有较好的同步性，且施肥损失率远小于3.5%的作业要求。

High-speed Capture Analysis of Fertilization Process for Deep-fertilization Liquid Fertilizer Device

Based on the rotating rate of planetary frame of 110 r/min, the pressure of liquid pump of 0.3 MPa, the diameter of valve core hole of distributor of 3 mm, the diameter of spraying-fertilizer needle nozzle of 2 mm, the working processes of pricking hole and spraying fertilizer of pricking hole mechanism were shot by high-speed camera. The movement laws of pricking hole and spraying fertilizer were analyzed by high-speed camera techniques and image processing technology, which showed that the fertilization time was 0.1 s from spraying-fertilizer needle went into the soil and began spraying fertilizer to it went out of the soil and stopped spraying fertilizer, the fertilization loss rate was 0.48%, the change of real trajectory width was 256 mm, and the change of height was 502 mm. The results showed that the processes of pricking hole and spraying fertilizer of pricking hole mechanism had good synchronicities, and fertilization loss rate was far less than the operation requirement 3.5%.