基于單片機的空氣濕度檢測系統設計-資料下載頁

　　

【正文】 方面，此系統除具有的檢測功能外，還有數據處理功能，濕度顯示功能，濕度控制功能等 MCS51 系列單片機 AT89C51 作為控制核心，門控信號由 AT89C51內部的計數定時器產生，單位為 1。由于單片機的計數頻率上限底（12MHz 晶振時約為 500KHz） ，所以需對高頻被測信號進行硬件預分頻處理，AT89C51 則完成運算、控制及顯示功能。由于使用了單片機，使整個系統具有極為靈活的可編程性，能方便地對系統進行功能擴展和改進。而本次設計正是鑒于單片機在這方面的優異性能 ,來設計一種用單片機濕度控制系統。在學校收集本課題的相關資料，并向指導老師請教相關問題。從最基本的做起,慢慢熟悉到熟練我們的工作,把我們所學的運用到工作中去。 本科生畢業設計（論文）26參考文獻[1] 徐翔,楊建國, AT89C51 微處理器的智能溫度測控系統[M].第一版.北京：:67118[2] [M].：機械工業出版社. 2022:246298[3] AT89C51 的溫濕度控制儀[M]. : 哈爾濱工業大學出版社. 2022:2752[4] 王學慧,[M].：電子工業出版社 1987:516[5] 洪文學,[J].電子科技導報1996,22 卷 1 期[6] 沈建華, 系列 16 位超低功耗單片機原理與應用[M].京：清華大學出版社 2022:3467[7] [M].：電子工業出版社.2022:101118[8] [M]. ：電子科技大學出版社 1997:2025[9] 李樹華 ,[J]. ,22(12): 7072[10] [M]. ：北京航空航天出版社. 1990:8997[11] 康華光,陳大欽. 電子技術基礎模擬部分. [M].第四版. 北京：高等教育出版社,[12] [M].：清華大學出版社 1990:928[13] AT89C51 Advance Information. Atmel[M].[14] 高海生，楊文煥. 單片機應用技術大全[M].： 西安交通大學出版社 1990：245278[15] DataCollecting System and RobotApparatus[M].:37本科生畢業設計（論文）27[16] 電路設計與應用[M]. ：國防工業出版社，2022：4570[17] 王德銀，張晨 .C51 系列單片機使用 C 語言程序設計 [M].北京:人民郵電出版社：90102[18] [J].儀表技術與傳感器，2022(3)：911[19] [M]：國防工業出版社，2022：104110[20] 張易知、肖嘯、張喜斌、[M].：電子工業出版社，2022：5962本科生畢業設計（論文）28致 謝本次畢業設計共經歷了四個月的時間，在各位老師和同學的關心幫助下才得以順利完成。在這段時間里，不僅大大提高了我的實踐經驗，也使我學到了許多書本上不曾接觸的知識，開拓了視野，擴大了知識面，最重要的是學到了如何利用信息資源幫助自己尋找資料，提高了自己的自學能力。我對本課題涉及的內容知道的不多，經過了這次的學習和指導教師王宇的細心教導，現在已經對它有了深刻的認識，雖然無法達到專業水平，但也是有了巨大的收獲，感覺自己受益匪淺。在論文完成之際，我首先謹向在我做畢業設計期間給予我無微不至關懷的王宇老師致以真誠的謝意，然后向在大學期間向我們傳授知識，提高素質的各位遼寧工業大學的教師表示感謝，最后對朝夕相處的同學在畢業設計期間給予我的支持和幫助送上我深深的謝意。 本科生畢業設計（論文）29附錄 I英文資料及翻譯Humidity Detection SystemThe human body has the very high request to living environment39。s humidity, relative humidity take 60%~70% as good, the winter should better not be lower than 50%, summer is not bigger than 80%. If the humidity is oversized, extremely easy to cause clothes leather to be affected with damp mildewy。 Grain drugs tobacco deterioration。 The electric appliance and the precision instrument are affected with damp suffer injury。 The wall floor appears waterdamaged, causes the document, the decoration and the collector is affected with damp mildewy。 Spring the bacterium multiplies, easy to induce the respiratory disease, rheumatism。 Summer the human body radiation difficulty, increases the heatstroke opportunity。 The winter will accelerate the hot conduction, will make one feel twice as coldly. Obviously humidity to person daily life importance. The humidity is not very only important to the home life39。s mon people, also pays attention for the warehousing department. In the Scientific research Unit or the laboratory, the Production workshop, needs to speak the ambient humidity control frequently in some certain scope. Under the different ambient humidity condition, certain material39。s physical property and the physical characteristics will also have the varying degree change, if the ambient humidity control will not be good, also will have the enormous influence to the test result and the product quality.AT89C51:The AT89C51 is a lowpower, highperformance CMOS 8bit microputer with 4Kbytes of Flash Programmable and Erasable Read Only Memory (PEROM). Thedevice is manufactured using Atmel’s high density nonvolatile memory technologyand is patible with the industry standard MCS51? instruction set and pinout. The onchip Flash allows the program memory to be reprogrammed insystem or by a conventional nonvolatile memory programmer. By bining a versatile 8bit CPU with Flash on a monolithic chip, the Atmel AT89C51 is a powerful microputer which provides a highly flexible and cost effective solution to many embedded control applications. The AT89C51 provides the following standard features: 4K bytes of Flash, 128 bytes of RAM, 32 I/O lines, two 16bit timer/counters, a five vector twolevel interrupt 本科生畢業設計（論文）30architecture,a full duplex serial port, onchip oscillator and clock , AT89C51 may defer to the conventional method to carry on the programming, also may the online programming. It will use in mon the microprocessor and the Flash memory will unify in together, specially might repeatedly scratch the Flash memory which will write to be possible effectively to reduce the development cost.Pin Description:Port 0:Port 0 is an 8bit open drain bidirectional I/O port. As an output port each pin can sink eight TTL inputs. When 1s are written to port 0 pins, the pins can be used as highimpedance 0 may also be configured to be the multiplexed loworder，address/data bus during accesses to external program，and data memory. In this mode P0 has internal pullups.Port 0 also receives the code bytes during Flash programing,and outputs the code bytes during program pullups are required during program verification.Port 1:Port 1 is an 8bit bidirectional I/O port with internal Port 1 output buffers can sink/source four TTL 1s are written to Port 1 pins they are pulled high by the internal pullups and can be used as inputs. As inputs,Port 1 pins that are externally being pulled low will source current (IIL) because of the internal 1 also receives the loworder address bytes during Flash programming and verification.Port 2:Port 2 is an 8bit bidirectional I/O port with internal Port 2 output buffers can sink/source four TTL 1s are written to Port 2 pins they are pulled high by the internal pullups and can be used as inputs. As inputs,Port 2 pins that are externally being pulled low will source current (IIL) because of the internal 2 emits the highorder address byte during fetches from external program memory and during accesses to external data memory that use 16bit addresses (MOVX @DPTR). In this application it uses strong internal pullups when emitting 1s. During accesses to external data memory that use 8bit addresses (MOVX @ RI), Port 2 emits the contents of the P2 Speci