多媒體數(shù)字化輸入系統(tǒng)設計

電子機電論文編號:JD1039  論文字數(shù):18928,頁數(shù):31，有大圖，外文翻譯

目  錄
 摘要   3
 Abstract   4
 第1章 緒論   5
 1.1 前言  5
 1.2 數(shù)字化輸入系統(tǒng)的現(xiàn)狀與發(fā)展趨勢  5
 1.3 研究的主要內容  7
 1.4 小結  8
 第2章 多媒體數(shù)字化輸入系統(tǒng)的工作原理   9
 2.1 各種手寫板的工作原理   9
 2.2 電磁手寫板的工作原   9
 2.3 電路結構原理   12
 2.4 聯(lián)機筆段識別方法的了解   14
 2.4.1聯(lián)機筆算識別的算法   15
 2.4.2提取筆段  15
 2.4.3識別筆段的方向   15
 2.4.4聯(lián)機筆段死別算法在嵌入式系統(tǒng)中的是想    18
 小結    18
 第3章 多媒體數(shù)字化輸入系統(tǒng)的設計   19
 3.1 前言（這種板的應用情況   19
 3.2 手寫板的設計   20
 3.2.1完成坐標確認的天線轉換開關芯片HC4051   21
 3.2.2完成信號放大的電路芯片14558   22
 3.2.3對信號進行模數(shù)轉換的芯片HC393D   24
 3.2.4反向電壓生成電路HC14    24
 3.2.5中央控制處理器HT46RB70   25
 3.2.6輸入手寫筆設備   27
 3.3 輸入板的設計    28
 結論   30
 參考文獻   31
 致謝   32

 摘要 
 多媒體教學寫字板應用在教學上，可以大大提高課堂傳授的知識量，所做的講稿可保存作為學生的復習資料；可以根據(jù)學生的接受能力再細化知識點，教室可以隨時表達自己的想法與靈感；模擬粉筆、黑板的教學方式的優(yōu)良傳統(tǒng)模式的同時，還減小了教職人的勞動強度。
 多媒體教學手寫板使用者通過專用手寫筆在板上特定區(qū)域書寫和草繪，模擬板書模式，無論速度還是精度，都將遠遠超過鼠標。使用此產(chǎn)品可以快速書寫簡化符號，示意圖表，表達式，流程等知識和方法的現(xiàn)場表達，而這些內容是鍵盤，鼠標難以靈活實現(xiàn)的。
 手寫板是一種集成了機械、軟件、通訊與電子等多能域的有機統(tǒng)一體【1】。作為一個團隊，我們需要完成的任務是：
（1）運用VC++6.0軟件編輯自己產(chǎn)品的應用界面，做出自己的風格，方便用戶與手寫板之間進行信息交互，避免干擾。
（2）采用電磁壓感式，利用其良好的性能，使使用者可以用它進行流暢的書寫，提高手感。
（3）降低手寫筆對電壓要求高，提高手寫板的工作穩(wěn)定性。
（4）實現(xiàn)對USB接口，電腦和手寫板的良好通訊，提高手寫板的靈敏度和準確度。
（5）開發(fā)活動區(qū)域，實現(xiàn)畫圖和寫字在同一界面完成。
（6）做出常用的快捷鍵按鈕，提高手寫板的可操作性。
（7）手寫板的手寫筆筆尖是活動部件，由于長時間、高頻率和筆尖細小，其使用壽命一般比較短，我們便從機械方面對其改進。
 作為團隊的一員，我的任務主要有：
現(xiàn)有手寫板工作原理的研究
現(xiàn)有手寫板電路研究
自制手寫板電路研究，實驗設計與記錄
設計改進按鈕功能，在電路硬件中的改進方案

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