【導讀】如有剽竊、抄襲、造假等違反學術(shù)道德、學術(shù)規(guī)范和侵權(quán)的。過網(wǎng)絡(luò)接受公眾的監(jiān)督。并在此硬件基礎(chǔ)上實現(xiàn)傳感器報警電路、光線強度報警電路及定時報警。目前各種單片機控制的理論和實際應(yīng)用系統(tǒng)的設(shè)計正在引起人們的廣泛關(guān)注。本文設(shè)計出了基于超聲波發(fā)射與接收技術(shù)的多功能視力保護器。通過實踐證明該視力。保護器可行且可靠性良好，使用方便。學生近視在我國已成為一個日益嚴重的社會問題。國家有關(guān)部門對許多職業(yè)。均有明確的視力要求，而一旦近視，花再多的錢醫(yī)治也不可能恢復原有的視力。專家認為造成學生近視的最主要原因是讀寫姿勢不正確。目前，青少年視力低下，已成為國內(nèi)外共同關(guān)心的公共衛(wèi)生問題。調(diào)查顯示50%以上的。有%視力低下的學生并未采取任何矯正措施，又缺專業(yè)機構(gòu)的治療。寫習慣，避免給人們身體帶來傷害。目前的激光切除手術(shù)其實是傷害了人。眼睛距離書本太近所致。大部分孩子喜歡趴在課桌上讀寫，并且老師、家長屢教不改，很難

　　

【正文】 北京：高等教育出版社， [3] 康華光 .電子技術(shù)基礎(chǔ)數(shù)字部分 .[M]北京：高等教育出版社， [4] 電子工藝實習 .[J]成都， [5] 電子技術(shù)實驗 .[J] 成都， [6] 電子線路設(shè)計實驗測試第二版 .[M]武漢：華中科大出版社， [7] 趙健 .實用聲光電及無線電遙控電路 300例 .[J]北京：中國電力出版社， [8] 鄭浩，高靜 .怎樣用萬用電表檢測電子元器件修訂本 .[J] 北京：人民郵電出版社， [9]全新實用電路集粹編輯委員會編著 .全新實用電路集粹 . [M]北京：機械工業(yè)出版社， [10] 王新賢 .通用集成電路速查手冊第二版 .[M] 山東科學技術(shù)出版社 ,2257 [11] The Institute of Electrical and Electronics Engineers, Std ,2020 edition, 21 致 謝 伴隨論文的完稿，緊張而又充實的大學生活也將隨之結(jié)束，回憶在唐山師院的學習生活，感觸頗深?？梢哉f，唐山的學習經(jīng)歷使我學到了許多更加珍貴的東西，這對我今后的學習工作和人生道路的選擇很有意義。 我的畢業(yè)論文撰寫工作自始至終都是在 崔乃忠 老師全面、具體的指導下進行的。 崔乃忠老師知識淵博、待人熱情，經(jīng)常與我交流自己的想法，盡最大努力給予了我多方面指導。 崔乃忠 老師嚴謹?shù)闹螌W態(tài)度和對工作兢兢業(yè)業(yè)、一絲不茍的精神將永遠激勵和鞭策我認真學習、努力工作。 在和崔 老師探討問題過程中，崔老師的諄諄教導使我受益匪淺。在論文的寫作過程中，老師提出了許多寶貴的意見，并不辭辛苦多次加以修改。從他身上，我不僅學到了科學的學習方式，還培養(yǎng)了不斷追求創(chuàng)新的思維方式，同時教育了我要耐心的去干任何一件事，而不是急于求成。在此，我要向我的老師致以最衷心的感謝和深深的敬意。 同時也感謝太軍君老師和 楊俊鋒 老師的關(guān)心和幫助，他們在論文開題答辯過程中提出了很多寶貴的意見和建議。 最后，衷心地感謝在百忙之中評閱論文和參加答辯的各位老師。 22 Student to use visual design of protection Liu panshi Directed by Naizhong Abstract: This paper presents a Multifunctional Sight protector based on Singlechip. Discussed the 89c52based singlechip hardware circuit and software design. And hardware based on this sensor alarm circuits, light intensity alarm circuit and alarm circuit from time to time. At present, singlechip microputer to control a variety of theoretical and practical application of system design is a cause for widespread concern. This paper introduces the development of SCM as well as the vision of the development of protective device, and control circuitry 89c52. This paper describes the use of c language programming methods have a pulse, and the use of singlechip timing function and assembly language to achieve the method from time to time. SCM can be a profound experience of the principles and design. Details of the hardware ponents of the system and its role, given the entire system software flowchart flow chart and some subroutines. Introduced the technology and promote the value of prospects. But the system still need to be put forward to solve some of the problems, and gives a possible way to solve these problems and methods. The design of ultrasonic technology as the main theory. Specific vision for the protection of the theory and hardware design of the study. Based on the laboratory39。s existing hardware platforms, the study aims to plete multifunctional vision for the protection of the hardware development and design and plete the corresponding hardware production. Its content is divided into two parts : the right vision for the protection of the hardware design and production of hardware. In the design of the existence of effective ways to protect and enhance vision for accurate circuit debugging difficult. In hardware design, based on ultrasonic technology of multicircuit protection of eyesight, ultrasonic receiver through the first right to receive the ultrasonic signal modulation output. achieve sound and light control circuit theory study a certain significance. 23 This paper describes the design based on the ultrasonic transmitter and receiver technology for the protection of multifunctional vision. Practice has proven through the vision Protection feasible good reliability and convenient. In this paper, and hope that through the electronic hardware production and theoretical research, for the latter part of the further design multifunctional vision for the protection and take reasonable measures to enhance the effectiveness of protection vision to provide reliable and effective source of data and information based. Keywords: Sensor alarm light intensity alarm timer c language Ultrasonic