多媒体数字化输入系统设计

电子机电论文编号:JD1039  论文字数:18928,页数:31，有大图，外文翻译

目  录
 摘要   3
 Abstract   4
 第1章 绪论   5
 1.1 前言  5
 1.2 数字化输入系统的现状与发展趋势  5
 1.3 研究的主要内容  7
 1.4 小结  8
 第2章 多媒体数字化输入系统的工作原理   9
 2.1 各种手写板的工作原理   9
 2.2 电磁手写板的工作原   9
 2.3 电路结构原理   12
 2.4 联机笔段识别方法的了解   14
 2.4.1联机笔算识别的算法   15
 2.4.2提取笔段  15
 2.4.3识别笔段的方向   15
 2.4.4联机笔段死别算法在嵌入式系统中的是想    18
 小结    18
 第3章 多媒体数字化输入系统的设计   19
 3.1 前言（这种板的应用情况   19
 3.2 手写板的设计   20
 3.2.1完成坐标确认的天线转换开关芯片HC4051   21
 3.2.2完成信号放大的电路芯片14558   22
 3.2.3对信号进行模数转换的芯片HC393D   24
 3.2.4反向电压生成电路HC14    24
 3.2.5中央控制处理器HT46RB70   25
 3.2.6输入手写笔设备   27
 3.3 输入板的设计    28
 结论   30
 参考文献   31
 致谢   32

 摘要 
 多媒体教学写字板应用在教学上，可以大大提高课堂传授的知识量，所做的讲稿可保存作为学生的复习资料；可以根据学生的接受能力再细化知识点，教室可以随时表达自己的想法与灵感；模拟粉笔、黑板的教学方式的优良传统模式的同时，还减小了教职人的劳动强度。
 多媒体教学手写板使用者通过专用手写笔在板上特定区域书写和草绘，模拟板书模式，无论速度还是精度，都将远远超过鼠标。使用此产品可以快速书写简化符号，示意图表，表达式，流程等知识和方法的现场表达，而这些内容是键盘，鼠标难以灵活实现的。
 手写板是一种集成了机械、软件、通讯与电子等多能域的有机统一体【1】。作为一个团队，我们需要完成的任务是：
（1）运用VC++6.0软件编辑自己产品的应用界面，做出自己的风格，方便用户与手写板之间进行信息交互，避免干扰。
（2）采用电磁压感式，利用其良好的性能，使使用者可以用它进行流畅的书写，提高手感。
（3）降低手写笔对电压要求高，提高手写板的工作稳定性。
（4）实现对USB接口，电脑和手写板的良好通讯，提高手写板的灵敏度和准确度。
（5）开发活动区域，实现画图和写字在同一界面完成。
（6）做出常用的快捷键按钮，提高手写板的可操作性。
（7）手写板的手写笔笔尖是活动部件，由于长时间、高频率和笔尖细小，其使用寿命一般比较短，我们便从机械方面对其改进。
 作为团队的一员，我的任务主要有：
现有手写板工作原理的研究
现有手写板电路研究
自制手写板电路研究，实验设计与记录
设计改进按钮功能，在电路硬件中的改进方案

Abstract
 WordPad multimedia applications in teaching, the classroom can greatly enhance the amount of knowledge to impart, the speech made by the review can be stored as information on students; can accept students according to ability to further refine the knowledge, the classroom can express their ideas and inspiration; simulated chalk, blackboard excellent teaching methods at the same time the traditional model, but also reduces the labor intensity of teaching people.      Multi-media teaching tablet users through a dedicated stylus to write in a specific area on the board and grass painted to simulate the writing on the blackboard model, regardless of speed or accuracy will be far more than the mouse. The use of this product can quickly simplify the writing symbols, schematic form, expression, process knowledge and methods, such as the site of expression, which is the keyboard, mouse, it is difficult to achieve flexibility.      Tablet is an integrated mechanical, software, communications and electronics, such as an organic unity to the domain. As a team, we need to complete the task is to: (1) the use of VC + +6.0 software products to edit their own application interfaces to make their own style, with hand-written user-friendly information exchange between the board to avoid interference. (2) the use of electromagnetic pressure flu-type, use its good performance, so that users can use it to write to smooth and improve feel. (3) to reduce the voltage requirements of a stylus on a high tablet work to improve stability. (4) the realization of the USB interface, tablet computers and good communication to improve the tablet sensitivity and accuracy. (5) regional development activities to achieve drawing and writing to complete the same interface. (6) of the shortcut keys to frequently used buttons to improve the operability of the tablet. (7) tablet stylus nib is the moving parts, as a result of long, high-frequency and small nib, and its relatively short life in general, we have to improve from their machinery. As a team, my tasks are: 1. The existing principle of tablet research 2. The existing circuit board handwritten 3. Homemade circuit tablet research, experimental design and recording 4. Designed to improve the button functions in the hardware circuit of the improved scheme