基于ATmega128的烟草智能打顶机控制系统设计

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毕业论文范文题目： 基于ATmega128的烟草智能打顶机控制系统设计，论文范文关键词： 基于ATmega128的烟草智能打顶机控制系统设计
基于ATmega128的烟草智能打顶机控制系统设计毕业论文范文介绍开始：
　　硕士学位论文基于ARM平台的μC/OS-Ⅱ的内核分析、扩展及改进，正文共86页。
　　【摘要】烟草打顶能增加烟叶产量,提高烟叶质量。打顶后,腋芽会消耗大量养分,影响叶片的生长和物质积累,所以烟株打顶的同时,必须控制腋芽的生长。设计研制的智能烟草打顶机能同时完成烟草智能打顶和抑芽作业,能改善我国烟草人工打顶抑芽、机械打顶和抑芽分步操作的落后局面,避免了以往打顶机“一刀切”的打顶状况。烟草智能打顶机主要完成烟草智能打顶和抑芽剂精准喷施,控制系统主要控制烟草智能打顶系统和抑芽剂喷施系统以保证作业机组正常作业。主要研究内容如下:(1)控制系统总体方案的确定。根据设计要求并结合烟草生产实际状况确定了一种既能满足设计要求又能在实际生产中应用的研究方案。(2)烟草智能打顶系统的设计。烟草智能打顶系统主要完成烟草高度的自动识别和刀架的自动升降,从而实现智能打顶。根据其工作原理选用了烟草高度识别装置为15个E3F-DS30C4型红外光电传感器,执行元件为86BYGH450C-02步进电机。工作时,15个红外光电传感器对每株烟草的高度进行精确测量,将测量信息传给单片机系统,单片机系统通过控制步进电机的正反转及旋转角度,对刀架的打顶高度进行精确调节,完成智能打顶。(3)抑芽剂喷施系统的设计。抑芽剂喷施系统主要完成打顶后烟秆的检测和抑芽剂的精准喷施。根据其工作原理选用了烟秆检测元件为1个E3F-DS30C4型红外光电传感器,抑芽剂喷施执行元件为3WE5A6.0F/AG24NZ5L型电磁阀。抑芽剂喷施装置安装在打顶装置后面,打顶后的烟草从红外光电传感器前经过,传感器检测到信号,把信号传给单片机系统,单片机控制电磁阀阀芯换位开始喷施抑芽剂,喷施一定时间后电磁阀阀芯回位喷药结束。(4)键盘与液晶显示模块的设计。键盘与液晶显示模块主要完成人机通讯,操作者可以通过键盘操作完成所需要的工作,同时可以通过显示模块随时观察控制系统的工作状态。可靠性试验结果表明:①烟草智能打顶系统能精确测量烟草高度,采用的光电传感器成本低且工作可靠,有效识别率达到100%,测量准确度达到98%以上,精准打顶率达到93%以上,满足使用要求。②电磁阀最佳工作条件为:开启时间为0.125 s,工作压力为0.325 MPa～0.5 MPa,电磁阀单次喷量为20～25 mL,满足实际需要。
　　【Abstract】 Tobacco topping can increase tobacco production, improve the quality of tobacco. After decapitation, axillary buds will consume large amounts of nutrients, which prevent growth of leaves and the accumulation of material. So while topping tobacco, we must control the growth of axillary bud. Intelligentized tobacco topping machine was developed which can simultaneously topping tobacco and control suckers. The machine not only improved the backward situation of manual topping and separate operation of mechanical tobacco topping and sucker controlling, but also avoided the situation of“indiscriminate”topping. Intelligentized tobacco topping machine was to to accomplish tobacco intelligent topping and suckercide precision spraying. Control system was used to control intelligent tobacco topping system and suckercide spraying system to ensure the machine normal operating. The main contents are as follows:(1) Determination of the control system program. According to the design requirements and the actual situation of tobacco production, a program was determited that not only satisfied design requirements but also can be used in the actual production.(2) Design of intelligent tobacco topping system. Intelligent tobacco topping system was used to accomplish tobacco height automatic identification and tool carriage automatic lifting, which achieved intelligent tobacco topping. According to the working principle, we chosed the tobacco height identification device was fifteen E3F-DS30C4 infrared photoelectric sensors. We chosed the execute component was an 86BYGH450C-02 step motor. Fifteen infrared photoelectric sensors of the system were used to profile of tobacco height and deliver measure information to the microcontroller system. Microcontroller unit was used for controlling rotation direction and rotation angle of stepping motor for lifting or dipping the tool carriage, so the tobaccowere topped at the appropriate height.(3) Design of suckercide spraying system. Suckercide spraying system was used to accomplish detection of tobacco stem after topping and suckercide precision spraying. According to the working principle, we chosed the tobacco stem detecting element was an E3F-DS30C4 infrared photoelectric sensor. We chosed the suckercide spraying execute component was a 3WE5A6.0F/AG24NZ5L solenoid valve. Suckercide spraying device was placed at the back of topping device. After topping, tobacco passed through by the front of infrared photoelectric sensor. Microcontroller unit controled solenoid valve spray suckercide solution to tobacco for a while.(4) Design of keyboard and LCD display module. Keyboard and LCD display module was used to complete human-machine communication. The operator can not only use the keyboard to complete the required work but also can observe control system working status through the LCD display module at any time.The results of reliability tests indicated that:①Intelligent tobacco topping system can accurately measure the height of tobacco. The photoelectric sensors were low-cost and reliable. Effective recognition rate of sensors came to100% and measuring accuracy came to 98%. Accuracy topping rate of the system came to 93%, which satisfied the demand of operation.②The best operating condition of the solenoid valve were: the opening time is 0.125 seconds, the working pressure is 0.325 MPa～0.5 MPa. Single spraying amount of solenoid valve came to 20～25 ml, which satisfied the actual needs.
　　【关键词】烟草智能打顶；控制系统；抑芽；步进电机；红外光电传感器；电磁阀；
　　【Key words】 Intelligent Tobacco Topping； Control System； Bud Inhibitor； Step Motor； Infrared Photoelectric Sensor； Solenoid Valve；

以上为本篇毕业论文范文 基于ATmega128的烟草智能打顶机控制系统设计的介绍部分。

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