排种位置自补偿式播种机试验台设计与试验

Design and Test of the Test-bed of Self Compensation Seeder for Seeding Position

为解决精量播种机行株距标准性实施差、播施位置自主调节能力低等问题,设计了一种播种位置自补偿式播种机试验台。试验台主要由六自由度振动平台、播种机机架、指夹式排种器、横纵向导轨平台、传送带和控制系统组成。试验台系统可通过输入载荷谱,调整六自由度平台各方向偏移量(角),以模拟田间作业情况,同时传感器与反馈控制系统实时监测数据并调节排种器导管位置偏移量,实现播种位置补偿。系统还可通过输入排种量与机组速度,对播量进行控制,最终实现在实验室内模拟播种机行走,并完成多种情况下的排种试验。试验台试验结果表明:有补偿装置作用的播种机,播种直线性提升了42%,稳定性提升了54%,播种位置补偿效果良好,播种效果在模拟工况下明显改善。

In order to solve the problems of poor standard implementation of precision seeder row spacing and low autonomous adjustment ability of seeding position,a self-compensated seeder test stand for seeding position was designed.The test bench is mainly composed of a six-degree-of-freedom vibration platform,a seeder frame,a finger clip seeder,a horizontal and vertical rail platform,a conveyor belt,and a control system.The test bench system can adjust the offset(angle)in each direction of the six-degree-of-freedom platform by inputting the load spectrum to simulate the field operation.At the same time,the sensor and feedback control system monitor and adjust the position deviation of the seeder duct in real time to achieve seeding Position compensation.The system can also control the seeding rate by inputting the seeding amount and the unit speed,and finally realize the simulation of the seeder walking in the laboratory,and complete the seeding test in many cases.The experimental results of the test bench show that the seeder with compensation device has improved the linearity of seeding by 42%and the stability by 54%.The seeding position compensation effect is good,and the seeding effect is obviously improved under simulated working conditions.