基于压力传感器的油菜排种量控制系统的设计与试验  

Design and test of a control system for rapeseed metering device based on pressure sensor for seed quantity control

作　　者：吴明亮[1,2] 杨洋[1] 官春云[3] 向伟[1] 陶栋材[1,2] 

机构地区：[1]湖南农业大学工学院,湖南长沙410128 [2]湖南省现代农业装备工程技术研究中心,湖南长沙410128 [3]湖南农业大学油料作物研究所,湖南长沙410128

出　　处：《湖南农业大学学报（自然科学版）》2014年第5期536-540,共5页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：国家科技支撑计划项目(2010BAD01B06);湖南省政府重大专项(湘府阅[2012]45号)

摘　　要：对2BYD–6型油菜浅耕直播施肥联合播种机上采用的偏心轮型孔轮式排种器,设计制作了变量播种控制系统。该控制系统主要由排量检测系统和排量调控系统两部分组成。排量检测系统借助压力传感器直接检测排种箱的质量变化,实现油菜排种量的检测;排量调控系统依据检测系统的检测结果转变为电信号,由单片机控制驱动排种轴电机转速来实现排量调控,达到所需的排种量。台架试验表明:控制系统能够精确检测排种器单位时间的排种量,实现变量播种;对油菜排种量检测每分钟积累误差可控制在3.5%以下,排种均匀性变异系数低于7%。A variable control system was designed and manufactured using eccentric orifice wheeled metering device for 2BYD-6 type rape shallow tillage fertilizing joint type sowing machine. The control system consists of an emission-detection system which depends on a pressure sensor directly detecting changes in quality seed box to realize the detection seed quantity sowed and a an two parts, displacement and displacement detection system regulation system components, displacement detection system by means of a pressure sensor directly detect changes in quality seed box to achieve the amount of canola seed testing Eemission-control system which based on electrical signals converted from the detection result of the detection system is converted to an electrical signal, to achieve emissions regulatedion and the desired amount of seed by controlling the motor speed of seeding shaft driven by the SCM seeding shaft drive motor speed to achieve the desired amount of seed. Bench test shows that the control system can accurately detect the amount of seed sowed per time unit which compared to the theoretical value, and realize variable seeding by regulating the rotational speed of metering device. The accumulation error for detecting rape seed volume per minute can be controlled below 3.5%, with seeding uniformity coefficient of variation less than 7%.

关 键 词：压力传感器 油菜 排种 变量控制 

分 类 号：S223.24[农业科学—农业机械化工程]