基于LabVIEW的果树仿形喷雾控制的实现研究

Research on Realization of Profile-modeling Spraying Control for Fruiter Based on LabVIEW

在对果树实施机械化施药的过程中,为了降低药液的浪费和对环境造成的污染,实现均匀和精确的喷雾,利用LabVIEW平台,提出了对果树仿形喷雾控制的实现方法。一是采用超声波传感器阵列检测果树的冠层形状。二是根据检测的结果,得到喷头组的运动控制策略。喷头组中一个喷头的运动对应由一个步进电机拖动,一个步进电机对应由一个单片机控制。一个单片机对应分布式控制系统一个节点。PC机把控制策略通过RS485总线发布到各个节点,各个节点根据控制策略,启动喷头运动到相应的位置。三是按照预定的压力和喷量实施喷雾。该方法进一步提高了喷药的效率,增加了施药的可控性,从而降低对环境的污染,为植保机械提供了一个可以选择的解决思路。

In the course of actualizing mechanical spraying for fruiter, for reducing the pesticide waste and environmental pollution, and the realization of spraying uniformity and precision, one method is brought forward to realize profile - modeling spraying control based on LabVIEW platform. First, ultrasonic sensor arrays are adopted to test the shape of fruiter - canopy. Second, according to the testing result, a decision for the spraying nozzles movement is made. One nozzle is dragged by one step - motor correspondingly. One step - motor is controlled by one single chip microcomputer correspondingly. One single chip microcomputer is one node in the distributed control system. PC transmits the control decision to every node by RS485 bus. According to the movement control decision, every nozzle is moved to the corresponding position. Third, the spraying is actualized in the light of preconcerted spraying press and quantity. The method can improve spraying efficiency, enhance spraying controllability and reduce environment pollution forward, which offers one selective solution for plant protection mechanism.