可调倾角编程式多功能取苗试验台设计与试验

Design and Experiment of Multipurpose Seedlings Pick-up Test Bench for Adjusting Inclination and Programming

针对现有取苗试验台不能满足多种型号钵盘和取苗机构进行取苗试验的需求,设计了一种由多个步进电机驱动、可调取苗机构倾角、可编程控制系统的多功能取苗试验台。该试验台通过调节取苗机构安装支架的位姿、改变钵盘驱动鼠笼钢丝间距以及所在圆周直径,可以适应不同型号钵盘和满足多种取苗机构的试验要求;通过编写控制器程序可控制3个步进电机联动并实现送苗装置的横、纵向送苗与取苗机构取苗进程相匹配。在三维软件中对试验台进行了建模、装配和虚拟仿真,在加工制造的物理样机上进行了2种型号钵盘和3种取苗机构的取苗试验。3次试验结果表明:在此试验台上能够顺利完成取苗试验,证明该试验台满足多种型号钵盘和多种类型取苗机构的试验需求。

Based on the fact that existing seedlings pick-up test bench cannot meet the needs of various types of seedlings bowls and seedlings pick-up mechanisms for seedlings pick-up test,a kind of multipurpose seedlings pick-up test bench which was driven by multiple stepper motors was designed and it can adjust seedlings pick-up mechanisms inclination and program in the control system.It can adapt to different types of bowls and meet the test requirements of various types seedlings pick-up mechanisms by adjusting the position and posture of the mounting bracket,changing the distance between steel wire and the diameter of the circumference of the wire in the driving cage of the bowl.By editing the controller program,the linkage of three stepper motors can be controlled and the horizontal and longitudinal seedlings feed process of the seedlings feeding device can be matched with seedlings pick-up process of the seedlings pick-up mechanism.Modeling,assembling and virtual simulation of the test bench were carried out in 3D modeling software.Two types of seedlings bowls and three types of seedlings pick-up mechanisms were tested on the physical prototype produced by processing.The results of the three tests showed that the seedlings pick-up test could be successfully completed on the seedlings pick-up test bench,which proved that the test bench could meet the test needs of various types of seedlings bowls and seedlings pick-up mechanisms.