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2. 將單戶門口機(jī) 12V 電源接入市電 220V(樓宇單元門口機(jī)則與防停電電源箱連接)。 4. 啟動錄像 ∕放像功能,需將室內(nèi)主機(jī)斷電 510 秒后,再重新接通電源。3/ 4CH 電視制式: PAL D/ K PAL I 整機(jī)功耗 : ﹤ 10W 天線阻抗: 75Ω 不平衡式 數(shù)碼式口機(jī)技術(shù)參數(shù) 數(shù)碼管顯示: “ ” 4 位動態(tài) 呼叫號碼: 4 位 通話時限: 15 秒 工作電壓: DC12V177。20mA 攝像頭: 1∕3” CCD 彩色攝像頭 清晰度: 420 線 最低照度: 視頻輸出: 1VPP∕75 音頻輸出不失真率: ≧ 100mW 頻率響應(yīng): 3003400Hz177。 LCD 電視的原理框圖如下圖所示,主要由以下幾個部分組成: RFO CVBS YUV/Sync 數(shù)字 YUV SVideo VChCro 伴音信號 VGA LCD 顯示 數(shù)據(jù) 接口 DVI 接口 普通模擬電視信號處理 模擬信號數(shù)字信號轉(zhuǎn)換 ADC 模擬 VGA/ 數(shù)字VGA 信號轉(zhuǎn)換ADC 隔行 /逐行轉(zhuǎn)換模塊 供電模塊 CPU 模塊 DVI 接收器 LCD 圖像信號處理(SCALER) DVI 接收器 LCD 模塊 洛陽理工學(xué)院畢業(yè)設(shè)計(論文) 20 1. 普通模擬電視信號處理模塊。 RF 電視射頻信號的接收一般使用一體化二合一高頻頭進(jìn)行處理,處 理后可直接輸出復(fù)合電視信號和解調(diào)的伴音信號。高頻頭輸出的復(fù)合電視信號經(jīng)視頻解碼 IC 處理后,輸出模擬 YUV(或 RGB)信號及行場同步信號供數(shù)字板進(jìn)行處理使用。該模塊把三通道模擬 YUV(或 RGB)信號,通過 AD 轉(zhuǎn)換器處理后,轉(zhuǎn)變?yōu)?24 路數(shù)字 YUV(或 RGB)信號提供給逐行處理板使用。該模塊把隔行格式的數(shù)字 YUV(或 RGB)信號進(jìn)行逐行處理后輸出一標(biāo)準(zhǔn)逐行格式的數(shù)字 YUV(或 RGB)信號。該模塊主要用把 PC 輸出的標(biāo)準(zhǔn)模擬VGA 視頻信號轉(zhuǎn)變成 24 位的并行數(shù)字 VGA 視頻信號。這部分的功能主要由 DVI 接收器來實(shí)現(xiàn)。 6. LCD 圖像處理模塊 (SCALER)。其主要功能有:數(shù)字色度亮 度處理、彩色 γ 校正、圖像大小縮放、畫質(zhì)改善、運(yùn)動補(bǔ)償、邊緣平滑等。這部分的功能主要由 DVI 發(fā)送器來實(shí)現(xiàn)。 8. LCD 顯示模塊。 9. CPU 模塊。 10. 供電模塊。 洛陽理工學(xué)院畢業(yè)設(shè)計(論文) 21 結(jié) 論 經(jīng)過 將近三個月的畢業(yè)設(shè)計 , 終于完成了智能電視監(jiān)控門鈴的設(shè)計,也 通過了 最后的硬件和軟件的模擬調(diào)試, 雖然在完成的過程中很艱難很復(fù)雜,出現(xiàn)了很多我不會的東西,不過在邵老師的指導(dǎo)下和同伴的合作下最終都解決了,這次畢業(yè)設(shè)計其實(shí)就是把我大學(xué)三年學(xué)到的東西匯總一下,在導(dǎo)師的指導(dǎo)下學(xué)會了運(yùn)用,我很高興這次設(shè)計的完成。這次設(shè)計總結(jié)起來 可得到如下結(jié)論 : 1. 系統(tǒng)總體方案設(shè)計正確、可行。智能系統(tǒng)從總體上分成語音圖像采集模塊、傳輸模塊、語音接收、圖像顯示及控制部分四部分是合理的。硬件采用模板逐步設(shè)計方式,根據(jù)功能插接相應(yīng)的模塊插件。同時模塊化的設(shè)計也為系統(tǒng)功能擴(kuò)展提供了方便。通過語音的溝通,使主人得到確切的信息,更使用、更安全。由于時間關(guān)系和水平有限,設(shè)計中仍存在著一些缺陷和不足,還有待于在今后的設(shè)計過程中進(jìn)一步不斷完善。 例如 增加自動撥號報警 功能、電子密碼鎖、電子遙控技術(shù)、自動控制技術(shù)。在新的產(chǎn)品化的管理系統(tǒng)中,人們將會越來越多的體驗(yàn)到現(xiàn)代生活的氣息。洛陽理工學(xué)院畢業(yè)設(shè)計() 22 謝 辭 畢業(yè)設(shè)計即將結(jié)束了,這也是我在大學(xué)階段最后一次設(shè)計。邵導(dǎo)師前瞻性的科學(xué)思維、寬廣的專業(yè)知識和兢兢業(yè)業(yè)的工作精神,令我敬佩,使我從中學(xué)到了許多,在導(dǎo)師的指導(dǎo)和幫助下,我順利地完成了這次設(shè)計任務(wù),在此向我的導(dǎo)師致以最誠摯的感謝!從一開始選題的確定,到開題報告的完成,以及初稿的修改, 定稿的調(diào)整,以及論文格式方面的問題,直至終稿,自始至終邵老師都給予了大量的關(guān)心與幫助,這使我在完成論文的過程中很是受益,在此再次深表感謝。雖然畢業(yè)設(shè)計已經(jīng)完成了,但是,由于自己所學(xué)的知識有限,我們在設(shè)計中遇到很多問題,在很多方面還不夠完善,實(shí)踐,是一面很亮的鏡子,能夠通過它看出我們自身的缺點(diǎn),通過這次設(shè)計,我明顯感覺到“書到用時方恨少”。多像老師學(xué)習(xí), 我希望在以后的工作和專 業(yè)發(fā)展中,邵老師能繼續(xù)給以指導(dǎo)和幫助下學(xué)到更多的知識來充實(shí)自己。你們是我走向社會的領(lǐng)路人,是我人生的指明燈。 最后,我要感謝評審本論文的老師、教授和專家,感謝他們抽出寶貴時間來閱讀本文,并提出寶貴的意見和建議。s high density, nonvolatile memory technology, patible with standard MCS51 instruction system in general, sheet 8 bit CPU and Flash storage unit, AT89C2051 singlechip microputer in electronic products in a wide range of applications. Internal structure AT89C2051 is a 2K byte flash programmable and erasable read only memory (EEPROM) low voltage, high performance 8 bit CMOS uses ATMEL highdensity nonvolatile memory technology manufacturing and industry standard MCS51 instruction set and pin structure the single chip bination of general CPLI and flash memory, ATMEL AT89C2051 is a powerful micro processor, which for many embedded control applications to provide a highly flexible and low cost solution. AT89C2051 offers the following functions: Standard 2K memory, 128 bytes of RAM, 15 I/O, two 16 bit timer, a five vector two suspended structure, a full duplex serial port, a precision analog parator and two optional software power save party stop CPU work but allows RAM, timer / counter, serial port and interrupt system to powerdown mode saves the RAM content but the oscillator stops working and the prohibition of other parts of the work to the next a hardware reset. The confidentiality of the procedure AT89C2051 design procedures are 2 confidential, confidential 1 is programmed, a program memory can not be erased unless a programming, the security bit 2 is programmed, program cannot be read. 洛陽理工學(xué)院畢業(yè)設(shè)計論文 27 Hardware and software development AT89C2051 can use the following two methods and development of application systems. 1, because 89C2051 internal program memory Flash, and modify it inside the program is very convenient, if equipped with a programmable 89C2051 personnel can use the program editing Compilation curing inserted into a circuit board test such repeated cycle method, for experienced MCS51 programmers, debugging this method is not very to do this test would not be able to understand the internal RAM content and program direction and other relevant information. 2, ordinary 8031/80C31 emulator simulation plug in ~ and ~ out simulation 2051, this method can use singlestep, breakpoint debugging method, but the simulation is not true, for example, 2051 internal analog parator function, P1, P3 export enhancement under tensile capacity etc..Pin description AT89C2051 chip pin diagram The AT89C2051 pin diagram as shown on the right. In 1, VCC: power supply voltage. In 2, GND. In 3, P1: P1 is a 8 bit bidirectional I/O of ~ with internal pullup resistor, and requires external pull up and are respectively as onchip precision analog parator of the inphase input (ANI0) and the inverting input (AIN1).The P1 port output buffer capable of absorbing 20mA current and can directly display driver the P1 port write 1, which can be used as input, when ~ is used as the input pins and is externally pulled low, they will 洛陽理工學(xué)院畢業(yè)設(shè)計論文 28 because of internal write 1, which can be used as the pin is ~ as input and is externally pulled low, they will because of internal pullup resistor and the outflow current. In 4, P3: P3 ~, mouth with internal pullup resistor seven bidirectional I/O is used for fixing the input in the output signal of the parator and it serves as a general I/O pins that are not port buffer can absorb 20mA the P3 export to write 1, they are internal pullup resistors are pulled up and used as input, is externally pulled low P3 mouth foot will use the pullup