大尺寸红外多点触控算法的研究与实现

发布时间：2018-03-10 11:33

本文选题：红外触摸屏　切入点：多点定位　出处：《中国海洋大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着触控技术的迅速发展,触摸屏的应用范围日益广泛,在教育行业、服务行业、医疗行业、军用行业等随处可见。触控技术日渐成熟的同时也带来了触控产品种类的增多。近年来,大尺寸红外触摸屏以环境适应性强、寿命更长、可识别触摸点数更多等优势得到了市场的认可,进入了井喷式爆发时期。本文第一部分首先介绍了本课题的研究背景及意义、国内外研究现状及发展趋势,介绍了本文的主要研究内容及论文组织结构,同时提出了本文的创新点。第二部分阐述了红外触摸屏的原理,介绍了红外触控系统的系统设计,分别对硬件、固件、USB HID通讯及算法四个模块做了详细介绍。其中硬件模块主要介绍了硬件电路,包括控制电路、扫描电路、信号处理电路和与USB通信电路：固件模块主要介绍了几种固件扫描方式,并做了对比分析；USB HID通讯模块主要介绍了HID类的相关配置,以及如何进行数据传输；算法模块主要介绍了红外触摸屏多点定位的基本原理。第三部分是本文的重点内容,首先详细介绍了几种红外多点定位方案,对各个方案的优缺点进行对比分析,提出了一种新型的基于多边形相交的多点定位方案。然后详细介绍了几种红外多点轨迹跟踪方案,根据速度、加速度进行轨迹预测,实现了基于全局组合最优的轨迹跟踪技术。最后针对复杂环境下的应用,提出了一种基于触摸屏自检与自调整的抗强光干扰技术。第四部分完成了实验平台的搭建,在搭建过程中首先通过模拟量调试平台与二值化调试平台完成硬件和算法的调试,然后完成55英寸结构样机的搭建,在结构样机上进行算法的测试。最后统计测试数据并进行对比分析,得出实验结果。本论文的研究成果已成功应用于批量上市的液晶电视上,为红外多点触控算法的进一步优化奠定了基础,具有非常好的经济效益和广阔的市场前景。
[Abstract]:With the rapid development of touch control technology, the scope of application of touch screen is more and more extensive, in education industry, service industry, medical industry, Military industry can be seen everywhere. The increasingly mature touch technology has also brought an increase in the variety of touch products. In recent years, large size infrared touch screen with strong environmental adaptability, longer life, The advantages of more identifiable touch points have been recognized by the market and entered the blowout period. The first part of this paper introduces the research background and significance of this topic, the current research situation and development trend at home and abroad. This paper introduces the main research contents and the structure of the thesis, and puts forward the innovation of this paper. The second part describes the principle of the infrared touch screen, introduces the system design of the infrared touch control system. The four modules of firmware HID communication and algorithm are introduced in detail. The hardware module mainly introduces the hardware circuit, including control circuit, scanning circuit, Signal processing circuit and communication circuit with USB: firmware module mainly introduces several kinds of firmware scanning methods, and compares and analyzes HID communication module mainly introduces the related configuration of HID class and how to transmit data. The algorithm module mainly introduces the basic principle of infrared touch screen multi-point localization. The third part is the key content of this paper. Firstly, several infrared multi-point positioning schemes are introduced in detail, and the advantages and disadvantages of each scheme are compared and analyzed. In this paper, a new multi-point location scheme based on polygon intersection is proposed, and then several infrared multi-point trajectory tracking schemes are introduced in detail, which can predict the trajectory according to the velocity and acceleration. The trajectory tracking technology based on the global combination optimization is realized. Finally, aiming at the application in complex environment, a kind of anti-interference technology based on touch screen self-detection and self-adjustment is proposed. The experiment platform is built in 4th part. In the process of building, the hardware and algorithm are debugged by the analog debugging platform and the binary debugging platform, and then the 55 inch structure prototype is built. The algorithm is tested on the prototype of the structure. Finally, the test data are statistically analyzed and compared, and the experimental results are obtained. The research results of this paper have been successfully applied to the liquid crystal TV on the mass market. It lays a foundation for the further optimization of infrared multipoint touch control algorithm and has a very good economic benefit and broad market prospect.
【学位授予单位】：中国海洋大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN219

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