水稻精量旱穴直播电驱排种设计与试验

Design and Experiment of Rice Precision Dry Electric Drive Seeding

针对地轮滑移造成播种机播种不均、漏播及株距调节精度不高的问题,以水稻精量旱穴直播机为对象设计了一种电驱控制系统代替传统的地轮驱动排种。该控制系统以GPS模块(伪距单点定位)和霍尔元件两种传感器进行速度检测,分别测试了3~4km/h、4~5km/h、5~6km/h和6~7 km/h等4种作业速度下的速度值,并检测了株距为20cm时两种测速装置的播种情况。试验结果表明:霍尔传感器在低速作业下速度值更稳定;速度越高,标准差越大;作业速度在3~5km/h时两种传感器的电驱控制系统播种合格率均大于80%,符合播种作业要求。本研究为单点定位GPS模块和霍尔传感器应用于旱田农机具测速系统提供了参考。

Aiming at the problem that the plant wheel slippage causes uneven seeding,missed sowing and low precision of plant spacing adjustment,this paper designs an electric drive control system instead of the traditional ground-wheel drive seeding for the rice precision dry-spot live broadcast machine.The control system uses the GPS module(pseudo-range single-point positioning)and the Hall element to measure the speed,and tests 3-4 km/h,4-5 km/h,5-6 km/h and 6-7 km/respectively.The speed values of the four working speeds,and the seeding conditions of the two speed measuring devices when the plant spacing is 20 cm.The test results show that the Hall sensor has a more stable speed value under low speed operation,and the higher the speed,the larger the standard deviation.When the working speed is 3~5 km/h,the seeding pass rate of the two types of sensors is more than 80%,which meets the requirements of seeding operation.It provides reference for a single point positioning GPS module and Hall sensor for the research of the speed measurement system of dryland agricultural machinery.