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Anti-patterns

  • 基于CC1110單片機(jī)公交報(bào)站系統(tǒng)的設(shè)計(jì)

    基于CC1110單片機(jī)公交報(bào)站系統(tǒng)主要由CC1110單片機(jī)最小系統(tǒng)和WT588D語(yǔ)音模塊組成,提出了如何實(shí)現(xiàn)語(yǔ)音報(bào)站,通過(guò)無(wú)線通信SimpliciTI網(wǎng)絡(luò)協(xié)議實(shí)現(xiàn)公交站臺(tái)的自動(dòng)播報(bào)和OLCD液晶顯示公交運(yùn)行的各類(lèi)信息。結(jié)果表明,該公交報(bào)站系統(tǒng)報(bào)站準(zhǔn)確率99%,價(jià)格比同類(lèi)產(chǎn)品下降了300%以上,系統(tǒng)組成結(jié)構(gòu)簡(jiǎn)單,提高了系統(tǒng)的抗干擾性和穩(wěn)定性,也便于攜帶。 Abstract:  The bus stop announcement system based on CC1110 MCU is composed of CC1110 MCU minimum system and WT588D voice module. How to achieve the voice announcing is put forward.The bus-stop will announce automatically and display on the OLCD by means of wireless communication SimpliciTI network protocol. As a result, the bus station stop announcement systems reported 99% accuracy rate, price of similar products declined by 300% or more, system of simple structure, improve the anti-jamming and stability of the power system, it is also portable.

    標(biāo)簽: 1110 CC 單片機(jī) 公交報(bào)站

    上傳時(shí)間: 2013-10-21

    上傳用戶:baby25825

  • 基于ST62單片機(jī)的稱(chēng)重顯示控制器

    一種基于ST62單片機(jī)的稱(chēng)重顯示控制器A Weighing Display Controller Based on ST62 Single Chip Computer祛 FA(上海時(shí)博飛奧控制系統(tǒng)有限公司,上海201100)摘要在介紹了基于ST62單片機(jī)的基礎(chǔ)上,詳細(xì)描述了稱(chēng)重顯控制器的硬件設(shè)計(jì)和軟件設(shè)計(jì)思路。該控制器結(jié)構(gòu)簡(jiǎn)單、操作方便、抗擾能力強(qiáng)等優(yōu)點(diǎn);具有較好的推廣應(yīng)用價(jià)值。關(guān)鍵詞稱(chēng)重顯示控制儀ST62單片機(jī)硬件設(shè)計(jì)軟件設(shè)計(jì)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(hù)電路,上電復(fù)位及低壓檢測(cè)復(fù)稱(chēng) 重 顯 示控制器是一種具有數(shù)字顯示、開(kāi)關(guān)量輸出、定值控制和通信功能的以微機(jī)為操作核心的稱(chēng)重控制裝置。它是電子衡器的重要基礎(chǔ)部件,直接影響電子衡器及電子稱(chēng)重系統(tǒng)的功能和性能。與合適的傳感器及承重傳力復(fù)位系統(tǒng)組合可組成配料秤、料斗秤、定值秤、平臺(tái)秤、汽車(chē)秤等,廣泛應(yīng)用于電力、化工、建筑、冶金、交通運(yùn)輸、食品、軍工等部門(mén),是進(jìn)行自動(dòng)稱(chēng)重配料控制和生產(chǎn)過(guò)程自動(dòng)化必不可少的重要檢測(cè)、控制裝置。隨著 稱(chēng) 重 計(jì)量自動(dòng)化水平的提高,對(duì)稱(chēng)重顯示控制器的要求也越來(lái)越高。為實(shí)現(xiàn)低漂移、高穩(wěn)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(zhuǎn)換器CS5550。為提高穩(wěn)定性和可靠性,采用集成度高的、抗干擾能力強(qiáng)的ST62單片機(jī)。

    標(biāo)簽: ST 62 單片機(jī) 稱(chēng)重

    上傳時(shí)間: 2013-10-29

    上傳用戶:釣鰲牧馬

  • 單片機(jī)系統(tǒng)“PC”失控的軟件措施

    單片機(jī)系統(tǒng)“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(xué)機(jī) 電 工 程 學(xué) 院 ,贛 州 34 10 00)摘要單片機(jī)系統(tǒng)在實(shí)際工業(yè)現(xiàn)場(chǎng)中可能遇到各種干擾和自身的隨機(jī)性故障。現(xiàn)場(chǎng)惡劣的環(huán)境有可能使計(jì)算機(jī)系統(tǒng)發(fā)生異常,計(jì)算機(jī)程序指針“PC”失控就是常見(jiàn)的故障之一,如果發(fā)生“PC”失控,將導(dǎo)致CPI工作混亂,釀成嚴(yán)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(jī)系統(tǒng)的正常工作。關(guān)鍵詞單片機(jī)“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(shè) 計(jì) 和 開(kāi)發(fā)單片機(jī)系統(tǒng)時(shí),一般難以周全地預(yù)計(jì)單片機(jī)系統(tǒng)在實(shí)際工業(yè)現(xiàn)場(chǎng)中可能遇到的各種干擾和自身的隨機(jī)性故障。因此,除了采取防止和抑制干擾的各項(xiàng)措施外,還應(yīng)該借助于軟件措施克服某些干擾,系統(tǒng)還應(yīng)具備迅速自行恢復(fù)的能力。本文介紹的應(yīng)對(duì)單片機(jī)系統(tǒng)PC失控的軟件措施,設(shè)計(jì)靈活,節(jié)省硬件資源,能保證測(cè)控系統(tǒng)長(zhǎng)期可靠地運(yùn)行。MC S- 5 1單片機(jī)以其優(yōu)良的性能價(jià)格比大量應(yīng)用于工業(yè)現(xiàn)場(chǎng)測(cè)試和控制領(lǐng)域。但是,現(xiàn)場(chǎng)惡劣的環(huán)境有可能使計(jì)算機(jī)系統(tǒng)發(fā)生異常,計(jì)算機(jī)程序指針PC失控就是常見(jiàn)的故障之一,一旦發(fā)生PC“走飛”,計(jì)算機(jī)系統(tǒng)就會(huì)出現(xiàn)工作混亂,釀成嚴(yán)重的事故。為 了 在 CP 失控時(shí)盡量減少由此帶來(lái)的不利影響,并盡快使系統(tǒng)恢復(fù)正常,需要采取一定的軟件措施和硬件措施。常見(jiàn)的硬件措施有“看門(mén)狗”電路。軟件措施設(shè)置的前提條件是:①在干擾作用下,微機(jī)系統(tǒng)硬件部分不會(huì)受到任何損壞,或者損壞部分設(shè)置有監(jiān)測(cè)狀態(tài)可供查詢;②程序區(qū)不會(huì)受到干擾侵害。單片機(jī)系統(tǒng)的程序和表格以及重要的參數(shù)均設(shè)置在ROM區(qū),不會(huì)因干擾的侵人而改變;③ RAM區(qū)中的重要數(shù)據(jù)不會(huì)被破壞,或者雖然被破壞,但是可以重新建立。

    標(biāo)簽: 單片機(jī)系統(tǒng) 軟件

    上傳時(shí)間: 2013-11-02

    上傳用戶:bhqrd30

  • LabVIEW for Everyone(經(jīng)典英文書(shū)籍)

    The #1 Step-by-Step Guide to labviewNow Completely Updated for labview 8!   Master labview 8 with the industry's friendliest, most intuitive tutorial: labview for Everyone, Third Edition. Top labview experts Jeffrey Travis and Jim Kring teach labview the easy way: through carefully explained, step-by-step examples that give you reusable code for your own projects!   This brand-new Third Edition has been fully revamped and expanded to reflect new features and techniques introduced in labview 8. You'll find two new chapters, plus dozens of new topics, including Project Explorer, AutoTool, XML, event-driven programming, error handling, regular expressions, polymorphic VIs, timed structures, advanced reporting, and much more. Certified labview Developer (CLD) candidates will find callouts linking to key objectives on NI's newest exam, making this book a more valuable study tool than ever. Not just what to d why to do it! Use labview to build your own virtual workbench Master labview's foundations: wiring, creating, editing, and debugging VIs; using controls and indicators; working with data structures; and much more Learn the "art" and best practices of effective labview development NEW: Streamline development with labview Express VIs NEW: Acquire data with NI-DAQmx and the labview DAQmx VIs NEW: Discover design patterns for error handling, control structures, state machines, queued messaging, and more NEW: Create sophisticated user interfaces with tree and tab controls, drag and drop, subpanels, and more Whatever your application, whatever your role, whether you've used labview or not, labview for Everyone, Third Edition is the fastest, easiest way to get the results you're after!

    標(biāo)簽: Everyone LabVIEW for 英文

    上傳時(shí)間: 2013-10-14

    上傳用戶:shawvi

  • 快速跳頻通信系統(tǒng)同步技術(shù)研究

    同步技術(shù)是跳頻通信系統(tǒng)的關(guān)鍵技術(shù)之一,尤其是在快速跳頻通信系統(tǒng)中,常規(guī)跳頻通信通過(guò)同步字頭攜帶相關(guān)碼的方法來(lái)實(shí)現(xiàn)同步,但對(duì)于快跳頻來(lái)說(shuō),由于是一跳或者多跳傳輸一個(gè)調(diào)制符號(hào),難以攜帶相關(guān)碼。對(duì)此引入雙跳頻圖案方法,提出了一種適用于快速跳頻通信系統(tǒng)的同步方案。采用短碼攜帶同步信息,克服了快速跳頻難以攜帶相關(guān)碼的困難。分析了同步性能,仿真結(jié)果表明該方案同步時(shí)間短、虛警概率低、捕獲概率高,同步性能可靠。 Abstract:  Synchronization is one of the key techniques to frequency-hopping communication system, especially in the fast frequency hopping communication system. In conventional frequency hopping communication systems, synchronization can be achieved by synchronization-head which can be used to carry the synchronization information, but for the fast frequency hopping, Because modulation symbol is transmitted by per hop or multi-hop, it is difficult to carry the correlation code. For the limitation of fast frequency hopping in carrying correlation code, a fast frequency-hopping synchronization scheme with two hopping patterns is proposed. The synchronization information is carried by short code, which overcomes the difficulty of correlation code transmission in fast frequency-hopping. The performance of the scheme is analyzed, and simulation results show that the scheme has the advantages of shorter synchronization time, lower probability of false alarm, higher probability of capture and more reliable of synchronization.

    標(biāo)簽: 快速跳頻 同步技術(shù) 通信系統(tǒng)

    上傳時(shí)間: 2013-11-23

    上傳用戶:mpquest

  • 基于ARM的遠(yuǎn)程無(wú)線視頻監(jiān)控終端設(shè)計(jì)

    提出了一種以ARM微處理器為控制核心的遠(yuǎn)程無(wú)線視頻監(jiān)控終端的設(shè)計(jì)方案,其監(jiān)控終端的硬件設(shè)計(jì)包括視頻采集處理、中央管理控制、無(wú)線傳輸3個(gè)模塊。并給出了監(jiān)控終端的軟件開(kāi)發(fā)平臺(tái)和開(kāi)發(fā)模式的系統(tǒng)啟動(dòng)代碼、嵌入式Linux系統(tǒng)移植以及驅(qū)動(dòng)程序和應(yīng)用程序。測(cè)試結(jié)果表明,該監(jiān)控終端設(shè)計(jì)方案合理、有效,基本滿足監(jiān)控需求。 Abstract:  A remote wireless video monitoring terminal design, which uses ARM microprocessor as its core control, is proposed in this paper.The hardware design of monitoring terminal system is composed of the video acquisition and processing module, the central management and control module, wireless transmission module.Meanwhile the monitoring terminal-s software development platform and development patterns are designed. Also the design of the system-s start codes, embedded Linux system-s transplantation process, driver and the corresponding applications are given. The results showed that the monitoring terminal design is reasonable, effective, basically meet monitoring requirements.

    標(biāo)簽: ARM 遠(yuǎn)程無(wú)線 視頻監(jiān)控 終端設(shè)計(jì)

    上傳時(shí)間: 2013-11-13

    上傳用戶:wanqunsheng

  • cad填充圖案大全下載_cad填充圖案怎么安裝

    不少使用CAD的朋友在找CAD填充圖案,附件是小編收集的近千種cad填充圖案打包,供CAD學(xué)習(xí)和使用者參考,希望對(duì)大家能有所幫助。以下是cad填充圖案使用說(shuō)明。 CAD填充圖案使用說(shuō)明: 1、將填充名改成自己比較容易識(shí)別的名稱(chēng),但要注意填充文件和填充名要完全一致(不用區(qū)分大小寫(xiě))。 我收集的這些填充圖案有些是中文名稱(chēng),很容易就知道填充圖案的類(lèi)型。有些是英文名,本來(lái)我想將這些英文名都改成中文名的填充。 我可以提供大家方法。先用記事本打開(kāi)其中一個(gè)填充文件,如下圖所示: 圖中打開(kāi)的填充名為b043,文件名也必須為043,否則CAD是不認(rèn)的。類(lèi)似上圖所示的填充,如果希望CAD的填充列表中直接顯示中文,方便查找,你就需要先用記事本將PAT文件打開(kāi),復(fù)制“板巖”,選中b043,粘貼將其替換成“板巖”,關(guān)閉并保存文件。選中文件后單擊文件名進(jìn)入重命名轉(zhuǎn)臺(tái),選中前面的B043,CTRl+V粘貼,將"B043.pat"修改成"板巖.pat"。 修改的最終效果類(lèi)似下圖所示的“六邊形蜂窩轉(zhuǎn)”填充。 2、不建議將所有收集的填充都一次性復(fù)制到CAD的填充目錄(patterns)下。 如果將大量填充都復(fù)制到CAD的填充目錄下,在填充時(shí)效率并不高,因?yàn)橐谏锨ХN填充中找出你要使用的填充,也不是一件簡(jiǎn)單的事情。因此我建議不要做加法,而是應(yīng)該做減法,將自己可能用到的填充保留,把根本不會(huì)用到的填充刪除。 對(duì)于這個(gè)壓縮包也是如此,當(dāng)需要使用其中某種填充時(shí),你再將填充拷過(guò)去。 3、如何在這么多填充圖案中找到自己需要的填充圖案。 由于有些填充圖案用的是英文名,可以分別通過(guò)文件名和包含文字來(lái)搜索你要找的填充名來(lái)判斷在這些填充中是否有你需要的填充。如果找到的是一個(gè)英文名稱(chēng)的填充文件,你可以參照第一點(diǎn)中的方法進(jìn)行修改,方便使用。

    標(biāo)簽: cad 圖案

    上傳時(shí)間: 2013-11-02

    上傳用戶:lhw888

  • pcb layout design(臺(tái)灣硬件工程師15年經(jīng)驗(yàn)

    PCB LAYOUT 術(shù)語(yǔ)解釋(TERMS)1. COMPONENT SIDE(零件面、正面)︰大多數(shù)零件放置之面。2. SOLDER SIDE(焊錫面、反面)。3. SOLDER MASK(止焊膜面)︰通常指Solder Mask Open 之意。4. TOP PAD︰在零件面上所設(shè)計(jì)之零件腳PAD,不管是否鑽孔、電鍍。5. BOTTOM PAD:在銲錫面上所設(shè)計(jì)之零件腳PAD,不管是否鑽孔、電鍍。6. POSITIVE LAYER:?jiǎn)巍㈦p層板之各層線路;多層板之上、下兩層線路及內(nèi)層走線皆屬之。7. NEGATIVE LAYER:通常指多層板之電源層。8. INNER PAD:多層板之POSITIVE LAYER 內(nèi)層PAD。9. ANTI-PAD:多層板之NEGATIVE LAYER 上所使用之絕緣範(fàn)圍,不與零件腳相接。10. THERMAL PAD:多層板內(nèi)NEGATIVE LAYER 上必須零件腳時(shí)所使用之PAD,一般稱(chēng)為散熱孔或?qū)住?1. PAD (銲墊):除了SMD PAD 外,其他PAD 之TOP PAD、BOTTOM PAD 及INNER PAD 之形狀大小皆應(yīng)相同。12. Moat : 不同信號(hào)的 Power& GND plane 之間的分隔線13. Grid : 佈線時(shí)的走線格點(diǎn)2. Test Point : ATE 測(cè)試點(diǎn)供工廠ICT 測(cè)試治具使用ICT 測(cè)試點(diǎn) LAYOUT 注意事項(xiàng):PCB 的每條TRACE 都要有一個(gè)作為測(cè)試用之TEST PAD(測(cè)試點(diǎn)),其原則如下:1. 一般測(cè)試點(diǎn)大小均為30-35mil,元件分布較密時(shí),測(cè)試點(diǎn)最小可至30mil.測(cè)試點(diǎn)與元件PAD 的距離最小為40mil。2. 測(cè)試點(diǎn)與測(cè)試點(diǎn)間的間距最小為50-75mil,一般使用75mil。密度高時(shí)可使用50mil,3. 測(cè)試點(diǎn)必須均勻分佈於PCB 上,避免測(cè)試時(shí)造成板面受力不均。4. 多層板必須透過(guò)貫穿孔(VIA)將測(cè)試點(diǎn)留於錫爐著錫面上(Solder Side)。5. 測(cè)試點(diǎn)必需放至於Bottom Layer6. 輸出test point report(.asc 檔案powerpcb v3.5)供廠商分析可測(cè)率7. 測(cè)試點(diǎn)設(shè)置處:Setup􀃆pads􀃆stacks

    標(biāo)簽: layout design pcb 硬件工程師

    上傳時(shí)間: 2013-11-17

    上傳用戶:cjf0304

  • 運(yùn)動(dòng)人體檢測(cè)和二維關(guān)鍵點(diǎn)提取

    給出了一種運(yùn)動(dòng)人體區(qū)域的檢測(cè)及其對(duì)應(yīng)的二維關(guān)鍵點(diǎn)的提取方法。首先運(yùn)用幀差法構(gòu)建一個(gè)自適應(yīng)的背景模型以達(dá)到背景初始化和背景更新的目的。接著用減背景法實(shí)現(xiàn)二維運(yùn)動(dòng)人體區(qū)域的檢測(cè)。最后將檢測(cè)到的運(yùn)動(dòng)人體區(qū)域,通過(guò)運(yùn)用APAR(anti-paralle lines)區(qū)域法實(shí)現(xiàn)對(duì)運(yùn)動(dòng)人體關(guān)鍵點(diǎn)的提取。

    標(biāo)簽: 運(yùn)動(dòng)人體檢測(cè) 二維

    上傳時(shí)間: 2013-10-25

    上傳用戶:lz4v4

  • In case you haven t realized it, building computer systems is hard. As the complexity of the system

    In case you haven t realized it, building computer systems is hard. As the complexity of the system gets greater, the task of building the software gets exponentially harder. As in any profession, we can progress only by learning, both from our mistakes and from our successes. This book represents some of this learning written in a form that I hope will help you to learn these lessons quicker than I did, or to communicate to others more effectively than I did before I boiled these patterns down.

    標(biāo)簽: complexity the building computer

    上傳時(shí)間: 2015-04-25

    上傳用戶:tyler

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