RIP图像插值放大技术在宽幅喷印中的应用研究

发布时间：2018-01-18 00:23

本文关键词：RIP图像插值放大技术在宽幅喷印中的应用研究　出处：《重庆大学》2012年硕士论文　论文类型：学位论文

【摘要】：宽幅数字喷墨打印机是一种典型的机电一体化喷印设备，其系统结构较复杂，研发设计难度较大，其关键技术涉及到机械、电机拖动、电力电子、数据通讯、图像处理等多个学科领域。随着社会的发展，大幅面喷印产品的应用领域不断拓展，需求不断扩大，宽幅数字喷墨打印机的使用也越来越广泛，，其市场前景看好。因此，研究与开发高性能、高性价比的宽幅数字喷印设备具有十分重要的意义。针对目前国内外宽幅数字喷印设备在光栅图像处理器（RIP）和运动控制方面存在的不足以及未来宽幅数字喷印设备相关技术的发展方向，本文结合宽幅数字喷印设备研制项目（重庆市科技攻关计划资助项目），在分析宽幅数字喷印设备机械结构、工作原理和工作流程的基础上，从图像插值放大这一环节入手，在输出图像质量与处理速度方面对RIP进行了优化；为了确保打印机最终的喷印质量与喷印速度，并完成了运动系统的精密控制设计。最终在研制的宽幅数字喷墨打印机样机上完成了相应的测试。本文分析了宽幅数字喷墨打印机RIP图像插值放大环节的基本原理，从时域和频域上对RIP常用插值算法进行了分析和比较，提出了新的基于边缘检测的RIP混合插值算法，并详细地介绍了新算法的基本原理及具体实现，最后在MATLAB平台上进行了算法的对比实验，验证了新算法的适用性与有效性。另外，本文还分析了宽幅数字喷墨打印机的走纸机构、送纸机构的机械结构及其运动控制需求，在已有的DSP+FPGA主控制平台上设计了运动控制方案及控制策略。针对字车机构，完成了字车无刷直流电机的加减速控制设计，速度反馈的PID控制设计。针对走纸机构完成了走纸步进电机的细分驱动设计，加减速控制设计。同时还完成了墨滴落点的分析与补偿设计。样机的喷印实验表明，使用新提出图像插值放大算法的RIP性能表现更好，而且本文完成的运动控制设计可以保证宽幅数字喷墨打印机稳定可靠运行，总体上实现了预期的喷印要求。
[Abstract]:Wideband digital inkjet printer is a typical mechatronic inkjet printing equipment, its system structure is complex, research and development design is difficult, its key technology involves machinery, motor drive, power electronics, data communication. Image processing and other disciplines. With the development of society, the application of large-format inkjet printing products continues to expand, the demand continues to expand, the use of wide-width digital inkjet printer is becoming more and more extensive. Therefore, it is of great significance to research and develop a wide range digital jet printing equipment with high performance and high cost ratio. Aiming at the shortage of grating image processor RIPs and motion control at home and abroad, and the development direction of the related technology of wideband digital jet printing equipment in the future. In this paper, based on the analysis of the mechanical structure, working principle and working flow of the wide-width digital jet printing equipment (Chongqing Science and Technology Research Project), the paper combines the research and development project of wide range digital jet printing equipment (Chongqing Science and Technology Research Project). The RIP is optimized in terms of output image quality and processing speed from the aspect of image interpolation amplification. In order to ensure the final printing quality and speed of the printer, the precision control design of the motion system is completed, and the corresponding test is completed on the developed prototype of the wide range digital inkjet printer. In this paper, the basic principle of interpolation and amplification of RIP image in wide amplitude digital inkjet printer is analyzed, and the common interpolation algorithms of RIP are analyzed and compared in time domain and frequency domain. A new RIP hybrid interpolation algorithm based on edge detection is proposed, and the basic principle and implementation of the new algorithm are introduced in detail. Finally, a comparative experiment of the algorithm is carried out on the MATLAB platform. The applicability and validity of the new algorithm are verified. In addition, the paper also analyzes the paper walking mechanism of wide width digital inkjet printer, the mechanical structure of paper feeding mechanism and its motion control requirements. The motion control scheme and control strategy are designed on the existing DSP FPGA main control platform, and the acceleration and deceleration control design of the brushless DC motor is completed for the word-car mechanism. The design of speed feedback PID control. The subdivision drive design and acceleration and deceleration control design of walking paper stepping motor are completed. At the same time, the analysis and compensation design of ink drop drop point are also completed. The experimental results show that the performance of RIP using the new image interpolation amplification algorithm is better, and the motion control design completed in this paper can ensure the stable and reliable operation of the wide-width digital inkjet printer. In general, the expected printing requirements have been achieved.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP391.41;TP334.83

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