摘要

在传统农业中的植保领域，化学除草剂的使用方式普遍为粗放式的大面积喷洒，一方面容易造成人身伤害，另一方面因为喷药时不是精确对准目标物，往往也喷在了无目标的土壤上。由于杂草在田间的分布是随机的，不均匀的，而且具有簇生性。正是这种杂草分布的不连续性，为精确施药技术的可行性提供了依据。本设计机构利用步进电机易于启动、停止，正反转及速度响应性好，同步带的传递平稳、准确，传递效率高等优点，通过他们作为机构的主要部件，带动施药喷头左右移动，从而达到对不规则生长的农作物进行精准施药的目的。本文的主要研究内容如下:
1、移动机构的分析
2、电机、联轴器、轴的选用
3、同步带控制系统
关键词：精准施药，同步带，喷头，移动机构
 
Abstract
Roughs Praying technology in traditional the usage method of chemistry herbicide is wide-spread to spray，spraying isn’t to aim at a target thing accurately，but usually spraying at the soil without weed，so plenty of herbicide is wasted，resulting in not only the Human body hurt easily，but also the ecosystem environment crisis and increasing agricultural chemicals residue. Because the distributing of weed in the field is random and asymmetry .The discontinuity of weed distributing Provide a basis for the Precise -spraying. This design using the step-motor easy to start, stop, positive and negative and response of the synchronous belt transmission, smooth, accurate, higher efficiency through them as a major part of the organization, spraying nozzles, and move on to grow crops irregular precision of pesticide.The contents of the study could briefly summarized as follows :
 
1、 The analysis of the move machine;
2、 The external motor、the coupling、the axle to choose;
3、 The system of the synchronous control
 
Key words:  Precise spraying，synchronous belt，spraying nozzles，the mobile mechanism.