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毕业设计（论文）中期检查表学生姓名学 号专业机械设计制造及其自动化选题情况课题名称茶叶自动包装机设计难易程度偏难适中偏易工作量较大合理较小符合规范化的要求任务书有无开题报告有无外文翻译质量优良中差学习态度出勤情况好一般差工作进度快按计划进行慢中期工作汇报及解答问题情况优良中差 前期资料齐全，设计态度好，能够积极地工作，对于遇到的问题能够通过与老师和同学的交流以及查阅资料来解决。 检查人 年 月 日 40 毕业设计（论文）任务书专 业： 机械设计制造及其自动化 学生姓名: xxxx 学 号: xxxxxxxxxx 设计(论文)题目： 茶叶自动包装机设计 起 迄 日 期: xxxxxxxxxx 设计(论文) 地点: xxxxxxxxxx 指 导 教 师: xxxxxxxxx 任务书下达日期: xxxxx 年x月xx 日任务书填写要求1毕业设计（论文）任务书由指导教师根据各课题的具体情况填写，经专业负责人审查签字后生效。此任务书应在毕业设计（论文）开始前一周内填好并发给学生；2任务书内容必须用黑墨水笔工整书写或按教务处统一设计的电子文档标准格式（可从教务处网页上下载）打印，不得随便涂改或潦草书写，禁止打印在其它纸上后剪贴；3任务书内填写的内容，必须和学生毕业设计（论文）完成的情况相一致；4任务书内有关“学院”、“专业”等名称的填写，应写中文全称，不能写数字代码。学生的“学号”要写全号（如：071626119）；5有关年月日等日期的填写，应当按照国标GB/T 740894数据元和交换格式、信息交换、日期和时间表示法规定的要求，一律用阿拉伯数字书写。如“2010年3月21日”或“2010-03-21”。2毕 业 设 计（论文）任 务 书41本毕业设计（论文）课题应达到的目的： 茶叶自动包装机设计包含了机械、电子等的相关技术，学生通过查阅资料、方案的确定、机械部分结构、控制部分设计、相关的运算等相关环节的亲身实践，能够锻炼学生对所学知识的综合运用能力，提高他们分析问题、解决问题的能力。通过查阅资料，了解目前机电行业的现状及发展趋势，对就业环境有初步的认识和了解。2本毕业设计（论文）课题任务的内容和要求设计内容对于茶叶、小颗粒包装等行业，其产品最后都要装成一定规格的包装，本题目就是针对这一行业，完成茶叶或颗粒状物料按照一定的设定值称量并打包。本题目包括袋子成型，茶叶称量，袋子热封、切断等动作，符合国家规定的精度标准。设计要求1、通过查阅资料，了解设备的用途、现状和发展趋势等，完成前期资料（开题报告、外文翻译）的撰写；2、安装并学习绘图软件，为下一步设计做准备；3、通过对设备动作的分析，及相关的计算，对比不同的可采纳的方案的优缺点，确定自己要采用的方案，进行总装配图设计；4、优化系统结构，进行零件图的设计及相关的校核。5、完成设计说明书的撰写。6、提供完整设计资料一套。3本毕业设计（论文）课题工作进度计划：起 迄 日 期工 作 内 容2015年 3月 08日 4月09日 4月 10日 4月17日 4月 18日 5月26日 5月 27日 6月07日 6月 08日 6月14日 6月 15日 6月19日查阅大量相关资料，了解机械设备的设计过程，零件及加工工艺，设备的发展现状，趋势，可行的技术路线，安装并学习绘图软件，确定方案，撰写完成前期资料。开题设计系统总装图，使结构合理，加工装配方便，进行必要的校核。进行零件的设计。撰写设计说明书，要简明扼要，叙述完整流畅。准备相关资料，完成图纸、说明书等的打印，准备答辩资料。论文答辩。按要求把所有设计资料准备齐全，修改正确，交到老师处。所在专业审查意见：负责人： 2015年 月 日毕 业 设 计（论文）任 务 书理工学院毕业设计前期工作材料学生姓名： xxxxx 学 号： xxxxxxxxx 专 业： 机械设计制造及其自动化 题 目： 茶叶自动包装机设计 指导教师： xxxxxxxxx 材 料 目 录序号名 称数量备 注1毕业设计选题、审题表12毕业设计任务书13毕业设计开题报告含文献综述14毕业设计外文资料翻译含原文15毕业设计中期检查表1201 年 月 说明：毕业设计（论文）中期检查工作结束后，请将该封面与目录中各种材料合订成册，并统一存放在学生“毕业设计（论文）资料袋”中（打印件一律用A4纸型）。 24 Research and Development of Automatic Control System on Material Split Packing and Packaging Integrated Machine Kai Yang1, a, Zhongshen Li1, b and Lei Zhang1, c 1College of Mechanical Engineering and Automation, Huaqiao University, Xiamen, 361021, China ayangkai1, blzscyw, czllxj Keywords: Automatic Control System, Split Packing, Packaging Machine, LPC2478, C/OS-II. Abstract. In order to meet the high speed, high precision, high reliability of the packaging machine, a novel control system is provided. In the hardware, the main circuits consisted of main processor module, memory module, temperature measurement and control module, input signal detection module, material split packing module, output driver module, human-machine interface module, system monitor module, power module and JTAG debug module, etc. In the software, the multi-tasking operating system C/OS-II and the graphical user interface C/GUI were successfully transplanted into LPC2478. Then an experimental platform was established. And many control tasks, including automatic measurement, making bags, loading, transferring, pumping vacuum, sealing and data display, were automatically and continuously executed on the platform. Finally the results show: the machine can package 30 packets (5 g per packet) in a minute; the packaging errors 0.2 g; the packaging qualified rates 93%. In conclusion, the system performance is good. Introduction With peoples living standards improving, higher requirements on material packaging are put forward. Some materials, such as food, medicines, not only require precise split packing, but also need vacuum packaging 1, 2. However, in the traditional mode of split packing and packaging, the work is very heavy, materials are easily contaminated, the packaging quality is not good, and the packaging efficiency is also low 3-5. To realize the integration of the automatic split packing and packaging and to meet the high speed, high precision and high reliability, a novel control system is urgently needed. Therefore, research and development of control system on the split packing and packaging integrated machine is of great significance. And an automatic control system of that machine based on ARM is provided in this paper. The overall design of the control system According to market demands and the split packing and packaging features of small granular materials, packaging processes, containing automatic measurement, making bags, pumping vacuum and sealing, are researched. The control system structure is designed as shown in Fig. 1. When the split packing and packaging machine is running, materials are precisely weighed by material split packing module, and then they are loaded into a ready made inner bag. After that, the bag is put into an outer bag and the whole bag is transferred into a vacuum chamber by manipulators,where air in the bag would be evacuated by air pump. Finally, the whole bag is sealed. During those processes, many solenoid valves are used to control various actuators. And, many sensors are used to detect the weight of the materials and location information.Thus, a complete closed-loop system is formed, and the system stability is improved. Hardware Design of the control system The hardware circuits are composed of main processor module, memory module, temperature measurement and control module, input signal detection module, material split packing module, Applied Mechanics and Materials Vol. 533 (2014) pp 294-297Online available since 2014/Feb/27 at (2014) Trans Tech Publications, Switzerlanddoi:10.4028/AMM.533.294All rights reserved. No part of contents of this paper may be reproduced or transmitted in any form or by any means without the written permission of TTP,. (ID: 17, University of California, San Diego, La Jolla, United States of America-18/05/14,08:44:26) output driver module, human machine interface module, system monitor module, power module and JTAG debug module, etc. Some of them are selected to introduce as follows. Main processor module. NXP Semiconductors designed the LPC2478 microcontroller, powered by the ARM7TDMI-S core, to be a highly integrated microcontroller for a wide range of applications that require advanced communications and high quality graphic displays. The LPC2478 can execute both 32-bit ARM and 16-bit Thumb instructions at the maximum 72 MHz system clock rate 6. The LPC2478 inputs signals from photoelectric sensors, magnetic switches, position sensors and infrared sensors. And control signals are output to control electromotors, solenoid valves, LCD, LED and buzzers, etc. Temperature measurement and control module. In this machine, molding inner bag and sealing outer bag are both operated in high temperature. The temperature is measured by K-type thermocouple and controlled by LPC2478. Circuits are shown in Fig. 2. The thermocouple reference function is given as follows: ()()2190-126.96869000niatiiEKta e=+ (1) And its inverse function is: ( )900niiitD E= (2) Where 90t () is the centigrade degree of the thermocouple, and E (mV) is the corresponding electromotive force, 0a, 1a, iK and iDare conversion coefficients 7. The heating resistor temperature is detected by thermocouples mounted thereon and amplified by operational amplifier OP07. Then the signals are converted from analog to digital. In accordance with the temperature control rules in LPC2478, the processed results are output to ULN2003 to control the start of the heating solid state relay YJGX-3FA. TH1+TH1-ADC123_IN10V5C15104R16100R145.1kR115.6kR10100W1200R13100R710MV5R81kR91k6-2+374V-V+U8OP07V5V-5TH1+R122kR15 100kTH1-Thermocouple 1+C1610uC18104D31N414812CN2HEADER 2+C1710uD01D12D23D34D45D56D67GND8RC9D610D511D412D313D214D115D016U14ULN2003YOUT8OUT8YOUT9OUT9V33YOUT8L220Y8Heating resistor 112-3+4SSR4YJGX-3FAR59200OUT8.9OUT8.9 Fig. 1 Control system structure Fig. 2 Temperature measurement and control circuits Material split packing module. The small granular materials are transferred into weighing hoppers with vibrating feeder, where their weight is detected by 3 Kg weighing sensors. Then the signals are converted by A/D converter CS5532. After that, the converted data is transferred to LPC2478 through SPI bus. The weighing module circuits are shown in Fig. 3. As a result of the differences between current weight and set weight and the change rates of them, LPC2478 outputs different frequency to control vibrating feeders. R274.7KV2.5V33C24104JC28104JC26104JL2100uHL3100uHC23104JC27104JC25104JC35223JC36104C37104R284.7KR294.7KR304.7KV33CY34.9152MPS1+PS1-PS2+PS2-12345678910CN4HEADER 10PS1+PS1-PS2+PS2-V2.5C30104JC34104JC32104JL4100uHL5100uHC29104JC33104JC31104JWeighing sensor 1Weighing sensor 2SPI_SSELSPI_SCKSPI_MISOSPI_MOSIM1+M1-M2-M2+V-2.5V-2.5SPI_SSELSPI_SCKSPI_MISOSPI_MOSISPI_SSELSPI_MOSISPI_MISOSPI_SCKAIN1+1AIN1-2AIN2-19AIN2+20C13C24VA+5VA-6A07A18OSC29OSC110SCLK11SDO12SDI13CS14VD+15DGND16VREF-17VREF+18U10CS5532BSZ SPI_SSELOUT25.28SPI_MOSISPI_MISOSPI_SCKsheet4weight.SchDocOUT0.24sheet5Youtput.SchDocsheet6power.SchDocADC123_IN10.11sheet3temperature.SchDocIN10.16IN1.7sheet2Xinput.SchDocOUT25.28SPI_SSELADC123_IN10.11IN10.16OUT0.24IN1.7LCD_R0.4LCD_G0.5LCD_B0.4LCD_CKLCD_FPLCD_ENLCD_LPTP_DITP_CKTP_DOTP_CSTP_IRQnDISPOffSPI_MOSISPI_MISOSPI_SCKsheet1main.SchDocLCD_R0.4LCD_G0.5LCD_B0.4LCD_CKLCD_FPLCD_ENLCD_LPnDISPOffTP_IRQTP_CSTP_CKTP_DITP_DOsheet7LCD.SchDoc Fig. 3 Weighing module circuits Fig. 4 Modules cascade chart ARM human-machine interface module input signal detection module material split packing module temperature measurement and control module and control module output driver module system monitor module memory module power module JTAG debug module Applied Mechanics and Materials Vol. 533295 Module cascade. Most of signals are connected through direct coupling cascade, but signals among external sensors, actuators and module circuits are connected by photoelectric isolation coupling cascade to improve the stability and security of the control system. All module schematics and the overall schematic of the control system are drawn through professional drawing software. And modules cascade is shown in Fig. 4. Software Design of the control system The real-time multi-tasking operating system C/OS-II is introduced to design the control system software which is based on top-down structure model and modular design. At first, the system C/OS-II and the graphical user interface C/GUIare successfully transplanted into LPC2478 and well initialized 8, 9. Then the main program starts to create tasks. The control tasks are mainly made up of automatic measurement, making bags, loading, pumping vacuum, sealing and data display, etc. They are conducted by LCD program, touch screen program, the split packing program, temperature control program, packaging control program, the general input and output program, etc. Some of them are selected to introduce as follows. LCD program. The LPC2478 has its own LCD controller. The TFT true color LCD is used to display packaging information, such as packaging parameter adjustment interface, manual operation interface, material real-time weight, molding inner bag temperature, sealing outer bag temperature and fault message windows. The graphical user interface C/GUI runs in the system C/OS-II, and the human-machine interface is beautiful. The LCD control flow is shown in Fig. 5. Packaging control program. In the light of packaging control requirements, there are a lot of input and output signals to process. Input data, comprising various switching signals and sensor outputs, are used to detect in which packaging process the machine runs. Then corresponding control signals would be generated to open solenoid valve or to start electromotor by LPC2478. Finally materials will be packaged into packets. The packaging process flow is shown in Fig. 6. Fig. 5 LCD control flow chart Fig. 6 Packaging process flow chart Test experiments The hardware and the software were integrated into an automatic control system prototype as shown in Fig. 7(a). An experimental platform of the split packing and packaging integrated machine was established as shown in Fig. 7(b). In the main interface, the control system can display two groups of material real-time weight, molding inner bag temperature, sealing outer bag temperature and the settings of them. Users can adjust the settings through + - buttons. Besides, there are manual operation, packaging parameter adjustment, date and time display, etc. In the test experiments, packaging begin put inner bag into outer bag transfer inner bag outer bag ready? open outer bag pusher ready? chamber ready? rotate vacuum chamber put whole bag into chamber vacuum pumping seal the whole bag end YNYNYNinitialize coordinate, size NLCD begin draw pixel color under a width? calculate bitmap addresses under a height? get memory addresses end YYN296Modern Tendencies in Engineering Sciences packaging weight and amount were measured in the settings of 5 g, 7 g and 15 g respectively in a minute. And each packet was weighed as shown in Fig. 7(c). Then, the material weight of all packets was calculated and recorded. Measurement points and weighing results were shown in Fig. 7(d). The long-term statistical results show: the machine can package 30 packets (5 g per packet) in a minute; the packaging errors 0.2 g; the packaging qualified rates 93%. 0510152025300246810121416Weight (g)Measurement point (a) (b) (c) (d) Fig.7 (a) Circuit board of the automatic control system, (b) experimental platform, (c) weighing packaged materials, (d) measurement point and weighing result chart Conclusions In compliance with the split packing and packaging requirements of small granular materials, an automatic control system is researched and developped. The main conclusions are: a) the hardware and the software of the control system are designed, the real-time multi-tasking operating system C/OS-II and the graphical user interface C/GUI are researched and successfully transplanted into LPC2478. b) an experimental platform of the split packing and packaging integrated machine is established. Many control tasks are automatically