关键词：喷墨打印机
RS422
Hale Waihona Puke 喷头驱动FPGA异步 FIFO
Abstract
Inkjet printing technology is a high-quality image output technology which develops at a high speed. It plays a significant role in the field of non-connect printing technology. According to the technical requirement of the specific high–speed inkjet printer and technical features of piezoelectric nozzles, a new control design of nozzles’ driving is proposed in this paper. Analyzing the structure, control signal and timing relationship of a kind of piezoelectric nozzle, this paper proposes a new organization of the nozzle in order to support scalability and rapid updating of data variable region. In addition, the overall design and each functional module of this special high-speed inkjet printer are discussed. In the part of the hardware design and realization of driving circuit, the standard of RS-422 serial bus is adopted aiming to improve the stability of data transmission. Then this paper presents a data transmission scheme of time division multiplexing, which enhances the utilization and maintenance of transmission cable, reduces the cost of system. Taking Altera company’Clyone series FPGA EP1C6Q240C8 and AD5424 as the core chip, the high-speed control timing of four nozzles is realized. It makes the system is smaller and more reliable. In the part of the FPGA internal logic implementation, this paper uses the top-down design method. Using asynchronous FIFO we well resolve the problem of the time-divided transmission between different clock domains. The data organization and print timing control of four nozzles are also achieved, which make use of the reference signal consisting of the same clock of different phase and a plurality of counter. For the purpose of color consistency, the waveform selection function is implemented. The hardware and software debugging results of the special high-speed inkjet printer shows that: the designed driving circuit of the nozzle can work stably, and meet the design requirements.
作者姓名 学科门类
王乐 工学
指导教师姓名、职称 学科、专业
田玉敏教授
计算机系统结构
提交论文日期
二○一二年一月
西安电子科技大学 学位论文创新性声明
秉承学校严谨的学风和优良的科学道德，本人声明所呈交的论文是我个人在 导师指导下进行的研究工作及取得的研究成果。尽我所知，除了文中特别加以标 注和致谢中所罗列的内容以外，论文中不包含其他人已经发表或撰写过的研究成 果；也不包含为获得西安电子科技大学或其它教育机构的学位或证书而使用过的 材料。与我一同工作的同志对本研究所做的任何贡献均已在论文中做了明确的说 明并表示了谢意。 申请学位论文与资料若有不实之处，本人承担一切的法律责任。 本人签名： 日期
Keyword：Inkjet printer RS422 Nozzle driver FPGA Asynchronous FIFO
目 录
第一章 绪论 ..................................................................................................... 1 1.1.1 喷墨打印机简介 ........................................................................ 1 1.1.2 喷墨打印机性能指标 ................................................................ 1 1.2 喷墨打印机国内外发展现状 .............................................................. 2 1.3 论文的主要工作及章节安排 .............................................................. 3 第二章 专用高速喷墨打印机总体设计 ......................................................... 5 2.1.1 喷墨打印原理分类 .................................................................... 5 2.1.2 压电式喷墨技术 ........................................................................ 6 2.1.3 喷头驱动方式 ............................................................................ 7 2.2 喷头结构及多喷头排列方式 .............................................................. 8 2.2.1 喷头结构 .................................................................................... 8 2.2.2 多喷头排列方式 ........................................................................ 9 2.3 专用高速喷墨打印机整体设计方案 ................................................ 10 2.3.1 专用高速喷墨打印机系统结构 .............................................. 10 2.3.2 打印机各个模块功能 .............................................................. 11 第三章 专用高速喷墨打印机喷头驱动电路硬件设计 ............................... 15 3.1.1 喷头驱动电路模块划分 .......................................................... 15 3.1.2 喷头驱动电路各模块功能描述 .............................................. 16 3.2 喷头驱动电路主要器件的选择 ........................................................ 17 3.2.1 子控制器接口模块选型 .......................................................... 17 3.2.2 FPGA 功能模块选型 ............................................................... 19 3.2.3 D/A 转换模块选型 .................................................................. 22 3.2.4 喷头接口模块选型 .................................................................. 24 3.2.5 功率放大器模块选型 .............................................................. 24 3.2.6 电源模块选型 .......................................................................... 25 3.3 喷头驱动电路的详细设计与实现 .................................................... 25 3.3.1 子控制器接口电路 .................................................................. 25 3.1 喷头驱动电路的整体设计方案 ........................................................ 15 2.1 喷墨打印机喷头的相关技术 .............................................................. 5