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  • 基于單片機的汽車多功能報警系統設計

    基于單片機的汽車多功能報警系統設計The Design of Automobile Multi-function AlarmingBased on Single Chip Computer劉法治趙明富寧睡達(河 南 科 技 學 院 ,新 鄉 453 00 3)摘要介紹了一種基于單片機控制的汽車多功能報警系統,它能對汽車的潤滑系統油壓、制動系統氣壓、冷卻系統溫度、輪胎欠壓及防盜進行自動檢測,并在發現異常情況時,發出聲光報警。闡述了該報警系統的硬件組成及軟件設計方法。關鍵詞單片機傳感器數模轉換報警Abstract Am ulti-fimctiona utomobilea larnungs ystemb asedo ns inglec hipc omputerco ntorlis in torducedin th isp aper.Th eo ilpr essuero flu bricatesystem, air pressure of braking system, temperature of cooling system, under pressure of tyre and guard against theft, detected automaticaly場thesystem. Audio and visual alarms wil be provided under abnormal conditions廠The hardware composition and software design of the system, described.Keywords Singlec hipc omputer Sensor Digital-t-oanaloguec onversion Alarmin 汽車多功能報苦器硬件系統設計根據 系 統 實際需要和產品性價比,選用ATMEL公司新生產的采用CMOs工藝的低功耗、高性能8位單片機AT89S52作為系統的控制器。AT89S52的片內有8k Bytes LSP Flash閃爍存儲器,可進行100(〕次寫、擦除操作;256Bytes內部數據存儲器(RAM);3 2 根可編程輸N輸出線;2個可編程全雙工串行通道;看門狗(WTD)電路等。系統由傳感器、單片機、模數轉換器、無線信號發射電路、指示燈驅動電路、聲光報警驅動電KD一9563,發出三聲二閃光。并觸發一個高電平,驅動無線信號發射電路。

    標簽: 單片機 汽車 多功能 報警

    上傳時間: 2013-11-09

    上傳用戶:gxmm

  • 雙單片機數據采集系統中TCPIP網絡模塊的實現

    隨著 微 電 子技術的飛速發展,電子產品越來越微型化,集成化,自動化,低廉化,進而推動著其它許多產業的發展。特別進人21世紀以來,生物技術與電子技術的結合,成為高科技領域的研究熱點。199()年由瑞士的Manz和Widmer首先提出的“微全分析系統”〔’〕(microto talan alysissy stems,即ptTAS),通俗地稱為“建在芯片上的實驗室”(Lab on a chip)或簡稱芯片實驗室(Lab chip),主要組成部分為電泳芯片,同時是進樣,分離和檢測為一體的微型裝置,其在電泳實驗中的高效檢測性能為生物化學分析儀器發展提供了一種借鑒。p.TAS廣泛應用于生物醫學、環境檢測、食品衛生、科學以及國防等眾多領域。目前 應 用 的大多為多通道的毛細管電泳芯片,這也是芯片發展的一個必然趨勢。這不僅對電泳芯片本身的設計和制作提出了更高的要求,也對傳感器和數據處理技術提出了新的挑戰。考慮成本,集成度,控制能力以及可靠性方面的因素,本系統采用單片機作為實時數據處理、控制以及通訊的硬件平臺。如果系統中既有實時的通信任務,同時又有其他實時任務,采用一個廉價的單片機,資源會比較緊張,不僅實現困難,結構復雜,而且效果可能不滿意。而采用高性能的處理器,又浪費了其有效資源,所以本系統采用兩個MCU協同工作,以并行/分布式多機的思想,構成了電泳芯 片核心的雙單片機系統結構。微全 分 析 系 統 進行的多項實時任務,可以劃分為以下 幾個模塊:①采集模塊。負責對外圍檢驗設備進行控 制以及對傳送過來的信號進行采集和分析;②交互模 塊。通過液晶顯示,鍵盤掃描,以及打印等實現實驗人 員對前端采集電路的交互操作;③雙單片機控制和通 信模塊。協調雙單片機之間的數據傳輸和指令傳輸 ;④網絡傳輸模塊。其中一個單片機通過以太網發送接 收數據到上位機。本文提出一種實時多任務的雙單片 機控制和通信系統[31的設計,一個MCU基于TCP /IP網絡模塊的實現。

    標簽: TCPIP 雙單片機 數據采集系統 網絡模塊

    上傳時間: 2013-11-15

    上傳用戶:wangdean1101

  • 基于ST62單片機的稱重顯示控制器

    一種基于ST62單片機的稱重顯示控制器A Weighing Display Controller Based on ST62 Single Chip Computer祛 FA(上海時博飛奧控制系統有限公司,上海201100)摘要在介紹了基于ST62單片機的基礎上,詳細描述了稱重顯控制器的硬件設計和軟件設計思路。該控制器結構簡單、操作方便、抗擾能力強等優點;具有較好的推廣應用價值。關鍵詞稱重顯示控制儀ST62單片機硬件設計軟件設計Abstract Ont heb asiso fin torductiono fST 62s inglec hipc omputer,th ed esignc oncrptof h ardwarea nds oftwarefo rw eighingd isplayc ontorleris d escrbed.The controler features simple structure, ease operation, powerful capability of anti-interference, etc.,it is wealth to be promoted into practicalapplicationsKeywords We妙噸display0 引言ST62s inglec hip Hardwared esign Softwaer design備 份 振 蕩器,振蕩器保護電路,上電復位及低壓檢測復稱 重 顯 示控制器是一種具有數字顯示、開關量輸出、定值控制和通信功能的以微機為操作核心的稱重控制裝置。它是電子衡器的重要基礎部件,直接影響電子衡器及電子稱重系統的功能和性能。與合適的傳感器及承重傳力復位系統組合可組成配料秤、料斗秤、定值秤、平臺秤、汽車秤等,廣泛應用于電力、化工、建筑、冶金、交通運輸、食品、軍工等部門,是進行自動稱重配料控制和生產過程自動化必不可少的重要檢測、控制裝置。隨著 稱 重 計量自動化水平的提高,對稱重顯示控制器的要求也越來越高。為實現低漂移、高穩定,本控制器采用低漂移、高增益放大器AD620和高分辨率的A/D轉換器CS5550。為提高穩定性和可靠性,采用集成度高的、抗干擾能力強的ST62單片機。

    標簽: ST 62 單片機 稱重

    上傳時間: 2013-10-29

    上傳用戶:釣鰲牧馬

  • 單片機系統“PC”失控的軟件措施

    單片機系統“PC”失控的軟件措施Software Measure of GettingO uto fC ontrolfo r“PC"in S ingleC hipC omputerS ystem謐 加 春 王 曉 基 雷 小 華(江 西 理 工 大 學機 電 工 程 學 院 ,贛 州 34 10 00)摘要單片機系統在實際工業現場中可能遇到各種干擾和自身的隨機性故障。現場惡劣的環境有可能使計算機系統發生異常,計算機程序指針“PC”失控就是常見的故障之一,如果發生“PC”失控,將導致CPI工作混亂,釀成嚴重的事故。研究了“PC”失控的原因,并指出軟件抗干擾的幾種方法,有效保證單片機系統的正常工作。關鍵詞單片機“PC”失控抗干擾Abstract Inp racticalin dustrialfi elds,th ereis v ariousin terferencea fectingo perationo fsi nglec hipc omputersy stemsa ndt hec omputersy stems。fac噸random faults飾themselves. It is very common that the severe environment makes the computer systems abnormal. The program counter "PC"gettingo utof co ntorlis on eo fth ec ommonfa ults.If th isoc curs,C PUw ouldb eru nningo utof or deran din torducesse riousan cient.T hec ausesof " PC"geting out of control, studied in this paper and some countermeasures of anti-interference師software are given to ensure single chip computer systemworking properly.Keywords Single。飾computer Porgramc ounter"P C" Anti-interfeernc 在設 計 和 開發單片機系統時,一般難以周全地預計單片機系統在實際工業現場中可能遇到的各種干擾和自身的隨機性故障。因此,除了采取防止和抑制干擾的各項措施外,還應該借助于軟件措施克服某些干擾,系統還應具備迅速自行恢復的能力。本文介紹的應對單片機系統PC失控的軟件措施,設計靈活,節省硬件資源,能保證測控系統長期可靠地運行。MC S- 5 1單片機以其優良的性能價格比大量應用于工業現場測試和控制領域。但是,現場惡劣的環境有可能使計算機系統發生異常,計算機程序指針PC失控就是常見的故障之一,一旦發生PC“走飛”,計算機系統就會出現工作混亂,釀成嚴重的事故。為 了 在 CP 失控時盡量減少由此帶來的不利影響,并盡快使系統恢復正常,需要采取一定的軟件措施和硬件措施。常見的硬件措施有“看門狗”電路。軟件措施設置的前提條件是:①在干擾作用下,微機系統硬件部分不會受到任何損壞,或者損壞部分設置有監測狀態可供查詢;②程序區不會受到干擾侵害。單片機系統的程序和表格以及重要的參數均設置在ROM區,不會因干擾的侵人而改變;③ RAM區中的重要數據不會被破壞,或者雖然被破壞,但是可以重新建立。

    標簽: 單片機系統 軟件

    上傳時間: 2013-11-02

    上傳用戶:bhqrd30

  • 《器件封裝用戶向導》賽靈思產品封裝資料

    Introduction to Xilinx Packaging Electronic packages are interconnectable housings for semiconductor devices. The major functions of the electronic packages are to provide electrical interconnections between the IC and the board and to efficiently remove heat generated by the device. Feature sizes are constantly shrinking, resulting in increased number of transistors being packed into the device. Today's submicron technology is also enabling large-scale functional integration and system-on-a-chip solutions. In order to keep pace with these new advancements in silicon technologies, semiconductor packages have also evolved to provide improved device functionality and performance. Feature size at the device level is driving package feature sizes down to the design rules of the early transistors. To meet these demands, electronic packages must be flexible to address high pin counts, reduced pitch and form factor requirements. At the same time,packages must be reliable and cost effective.

    標簽: 封裝 器件 用戶 賽靈思

    上傳時間: 2013-10-22

    上傳用戶:ztj182002

  • Employing a Single-Chip Transceiver in Femtocell Base-Station Applications

    Abstract: This application note discusses the development and deployment of 3G cellular femtocell base stations. The technicalchallenges for last-mile residential connectivity and adding system capacity in dense urban environments are discussed, with 3Gfemtocell base stations as a cost-effective solution. Maxim's 3GPP TS25.104-compliant transceiver solution is presented along withcomplete radio reference designs such as RD2550. For more information on the RD2550, see reference design 5364, "FemtocellRadio Reference Designs Using the MAX2550–MAX2553 Transceivers."

    標簽: Base-Station Applications Single-Chip Transceiver

    上傳時間: 2013-11-07

    上傳用戶:songrui

  • Analog Solutions for Altera FPGAs

    Designing withProgrammable Logicin an Analog WorldProgrammable logic devices revolutionizeddigital design over 25 years ago,promising designers a blank chip todesign literally any function and programit in the field. PLDs can be low-logicdensity devices that use nonvolatilesea-of-gates cells called complexprogrammable logic devices (CPLDs)or they can be high-density devicesbased on SRAM look-up tables (LUTs)

    標簽: Solutions Analog Altera FPGAs

    上傳時間: 2013-11-08

    上傳用戶:蟲蟲蟲蟲蟲蟲

  • 多遠程二極管溫度傳感器 (Design Considerat

    多遠程二極管溫度傳感器-Design Considerations for pc thermal management Multiple RDTS (remote diode temperature sensing) provides the most accurate method of sensing an IC’s junction temperature. It overcomes thermal gradient and placement issues encountered when trying to place external sensors. PCB component count decreases when using a device that provides multiple inputs.Better temperature sensing improves product performance and reliability. Disk drive data integrity suffers at elevated temperatures. IBM published an article stating that a 5°C rise in operating temperature causes a 15% increase in the drive’s failure rate. The overall performance of a system can be improved by providing a more accurate temperature measurement of the most critical devices allowing them to run just a few degrees hotter.The LM83 directly senses its own temperature and the temperature of three external PN junctions. One is dedicated to the CPU of choice, the other two go to other parts of your system that need thermal monitoring such as the disk drive or graphics chip. The SMBus-compatible LM83 supports SMBus timeout and logic levels. The LM83 has two interrupt outputs; one for user-programmable limits and WATCHDOG capability (INT), the other is a Critical Temperature Alarm output (T_CRIT_A) for system power supply shutdown.

    標簽: Considerat Design 遠程 二極管

    上傳時間: 2014-12-21

    上傳用戶:ljd123456

  • 71M6541演示板用戶手冊

    The Maxim Integrated 71M6541-DB REV 3.0 Demo Board is a demonstration board for evaluating the 71M6541 device for single-phase electronic energy metering applications in conjunction with the Remote Sensor Inter-face. It incorporates a 71M6541 integrated circuit, a 71M6601 Remote Interface IC, peripheral circuitry such as a serial EEPROM, emulator port, and on-board power supply. A serial to USB converter allows communication to a PC through a USB port. The Demo Board allows the evaluation of the 71M6541 energy meter chip for measurement accuracy and overall system use.

    標簽: 71M6541 演示板 用戶手冊

    上傳時間: 2013-11-06

    上傳用戶:雨出驚人love

  • C8051F020數據手冊

      The C8051F020/1/2/3 devices are fully integrated mixed-signal System-on-a-Chip MCUs with 64 digital I/O pins (C8051F020/2) or 32 digital I/O pins (C8051F021/3). Highlighted features are listed below; refer to Table 1.1 for specific product feature selection.

    標簽: C8051F020 數據手冊

    上傳時間: 2013-11-08

    上傳用戶:lwq11

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