2005年上海市高校學(xué)生嵌入式系統(tǒng)創(chuàng)新設(shè)計(jì)競(jìng)賽獲獎(jiǎng)作品，論文摘要：本文所介紹的小區(qū)停車(chē)場(chǎng)智能收費(fèi)管理系統(tǒng)是基于RFID技術(shù)而設(shè)計(jì)的。整個(gè)系統(tǒng)主要由一臺(tái)PC機(jī)、值班室reader（讀卡器）模塊、小區(qū)入口處reader模塊、小區(qū)出口處reader模塊以及相應(yīng)的外圍控制電路組成。重點(diǎn)闡述了一種小區(qū)停車(chē)場(chǎng)智能收費(fèi)系統(tǒng)的解決方案，提出了一種受控的RFID標(biāo)簽的設(shè)計(jì)方法，設(shè)計(jì)了 PCB板的 RF天線及大尺寸的銅管天線，同時(shí)討論分析了多個(gè)reader和PC機(jī)聯(lián)機(jī)通信的方式。
標(biāo)簽： RFID 停車(chē)場(chǎng) 收費(fèi) 管理系統(tǒng)
上傳時(shí)間： 2013-05-20
上傳用戶：tianyi223
高速數(shù)字系統(tǒng)設(shè)計(jì)下載pdf:High-Speed Digital SystemDesign—A Handbook ofInterconnect Theory and DesignPracticesStephen H. HallGarrett W. HallJames A. McCallA Wiley-Interscience Publication JOHN WILEY & SONS, INC.New York • Chichester • Weinheim • Brisbane • Singapore • TorontoCopyright © 2000 by John Wiley & Sons, Inc.speeddigital systems at the platform level. The book walks the reader through everyrequired concept, from basic transmission line theory to digital timing analysis, high-speedmeasurement techniques, as well as many other topics. In doing so, a unique balancebetween theory and practical applications is achieved that will allow the reader not only tounderstand the nature of the problem, but also provide practical guidance to the solution.The level of theoretical understanding is such that the reader will be equipped to see beyondthe immediate practical application and solve problems not contained within these pages.Much of the information in this book has not been needed in past digital designs but isabsolutely necessary today. Most of the information covered here is not covered in standardcollege curricula, at least not in its focus on digital design, which is arguably one of the mostsignificant industries in electrical engineering.The focus of this book is on the design of robust high-volume, high-speed digital productssuch as computer systems, with particular attention paid to computer busses. However, thetheory presented is applicable to any high-speed digital system. All of the techniquescovered in this book have been applied in industry to actual digital products that have beensuccessfully produced and sold in high volume.Practicing engineers and graduate and undergraduate students who have completed basicelectromagnetic or microwave design classes are equipped to fully comprehend the theorypresented in this book. At a practical level, however, basic circuit theory is all thebackground required to apply the formulas in this book.
標(biāo)簽： 高速數(shù)字 系統(tǒng)設(shè)計(jì)
上傳時(shí)間： 2013-10-26
上傳用戶：縹緲
Occasionally, we are tasked with designing circuitry for aspecific purpose. The request may have customer originsor it may be an in-house requirement. Alternately, a circuitmay be developed because its possibility is simply tooattractive to ignore1. Over time, these circuits accumulate,encompassing a wide and useful body of proven capabilities.They also represent substantial effort. These considerationsmake publication an almost obligatory propositionand, as such, a group of circuits is presented here. This isnot the first time we have displayed such wares and, giventhe encouraging reader response, it will not be the last2.Eighteen circuits are included in this latest effort, roughlyarranged in the categories given in this publication’s title.They appear at the next paragraph.
標(biāo)簽： 信號(hào)源 調(diào)節(jié)器 電源 電路分析
上傳時(shí)間： 2013-11-12
上傳用戶：012345
This collection of circuits was worked out between June1991 and July of 1994. Most were designed at customerrequest or are derivatives of such efforts. All representsubstantial effort and, as such, are disseminated here forwider study and (hopefully) use.1 The examples areroughly arranged in categories including power conversion,transducer signal conditioning, amplifiers and signalgenerators. As always, reader comment and questionsconcerning variants of the circuits shown may be addresseddirectly to the author.
標(biāo)簽： 測(cè)量 控制 實(shí)用電路 分
上傳時(shí)間： 2013-11-15
上傳用戶：凌云御清風(fēng)
This ink marks LTC’s eighth circuit collection publication.1We are continually surprised, to the point of near mystification, by these circuit amalgams seemingly limitlessappeal. reader requests ascend rapidly upon publication,remaining high for years, even decades. All LTC circuitcollections, despite diverse content, share this popularity,although just why remains an open question. Why isit? Perhaps the form; compact, complete, succinct andinsular. Perhaps the freedom of selection without commitment,akin to window shopping.
標(biāo)簽： 電源轉(zhuǎn)換 測(cè)量 脈沖電路
上傳時(shí)間： 2014-01-06
上傳用戶：ligi201200
Designing read/write device (RWD) units for industrial RF-Identification applications is strongly facilitated by the NXP Semiconductors HITAG reader Chip HTRC110. All needed function blocks, like the antenna driver, modulator demodulator and antenna diagnosis unit, are integrated in the HTRC110. Therefore only a minimum number of additional passive components are required for a complete RWD. This Application Note describes how to design an industrial RF-Identification system with the HTRC110. The major focus is dimensioning of the antenna, all other external components including clock and power supply, as well as the demodulation principle and its implementatio
標(biāo)簽： HITAG HTRC 110 讀寫(xiě)芯片
上傳時(shí)間： 2013-10-22
上傳用戶：zhengjian
介紹一種簡(jiǎn)單射頻識(shí)別系統(tǒng)設(shè)計(jì)。該設(shè)計(jì)包括閱讀器、應(yīng)答器和線圈3部分。由單片機(jī)控制閱讀器向應(yīng)答器發(fā)射無(wú)線信號(hào)，并接收應(yīng)答器回送的信號(hào)，再通過(guò)分析回送信號(hào)識(shí)別物品。閱讀器和應(yīng)答器之間以半雙工通信方式通信。 Abstract: A simple design of radio frequency identification system is given in this paper.The design includes reader,responder and winding.Through MCU，signals are sent to responder from reader，then corresponding signals are sent back. According to the analysis of the signals sent back，the objects can be identified.Half-duplex communication is adopted? between? reader? and? responder.
標(biāo)簽： 51單片機(jī) 無(wú)線識(shí)別 裝置
上傳時(shí)間： 2013-10-11
上傳用戶：plsee
介紹一種采用單片機(jī)技術(shù)和基站器件EM4095的手持式低頻RFID讀卡器方案。首先對(duì)整個(gè)系統(tǒng)框架進(jìn)行說(shuō)明，然后介紹主要功能模塊的設(shè)計(jì)，給出了各模塊的原理圖。重點(diǎn)描述了基站器件EM4095的性能參數(shù)和功能原理，最后描述了該系統(tǒng)的主程序流程圖。 Abstract: In this paper,a handheld RFID reader based on MCU and EM4095 is introduced.At first，the configuration of this system is explained.Then the design of main modules and schematic documents are particularly presented.The parameters and principle of the chip EM4095 are introduced in detail. At last，the main software flow is given
標(biāo)簽： 4095 RFID EM 單片機(jī)
上傳時(shí)間： 2013-10-18
上傳用戶：windypsm
Luminary Micro Stellaris™ microcontrollers that are equipped with an analog-to-digital converter(ADC), use an innovative sequence-based sampling architecture designed to be extremely flexible,yet easy to use. This application note describes the sampling architecture of the ADC. Sinceprogrammers can configure Stellaris microcontrollers either through the powerful StellarisFamilyDriver Library or through direct writes to the device's control registers, this application note describesboth methods. The information presented in this document is intended to complement the ADCchapter of the device datasheet, and assumes the reader has a basic understanding of howADCsfunction.
標(biāo)簽： Microcontr Stellaris Using the
上傳時(shí)間： 2013-10-14
上傳用戶：blans
基于PIC單片機(jī)的低功耗讀卡器硬件設(shè)計(jì):本文提出了一個(gè)完整的基于串口的智能讀卡器子系統(tǒng)設(shè)計(jì)方案并將其實(shí)現(xiàn)。讀卡器的設(shè)計(jì)突出了小型化的要求，全部器件使用貼片封裝。為了減小讀卡器的體積，設(shè)計(jì)中還使用了串口竊電的技術(shù)，使用串口信號(hào)線直接給讀卡器供電。為此，讀卡器使用了省電的設(shè)計(jì)，采用了省電的集成電路，并大膽簡(jiǎn)化了許多傳統(tǒng)的設(shè)計(jì)電路。關(guān)鍵字： 讀卡器， 單片機(jī)， 串口竊電 Abstract： This paper aims to put forward a complete design of Smart IC card reader based onSerial Port and propose the way of realizing it for the purpose of Network Security. SMD isadopted to make Smart IC reader smaller in this design. To reduce the volume of Smart ICreader， Serial Port powered technology is employed to get power from the signal line of Serial Port. For this reason， low-power consumption components are adopted in the design and some traditional designs are simplified to reduce the power consumption.Keywords： Card reader； Single-chip Computer； Serial Port Powered IC 卡系統(tǒng)保存了加密算法所需要的工作密鑰，供加密算法對(duì)網(wǎng)絡(luò)上傳輸?shù)臄?shù)據(jù)加密使用，是整個(gè)系統(tǒng)網(wǎng)絡(luò)安全的核心。在IC 卡子系統(tǒng)中，讀卡器是一個(gè)重要的部分。它起著管理IC卡、在IC 卡和PC或網(wǎng)絡(luò)計(jì)算機(jī)間傳遞數(shù)據(jù)的重要作用。本文以一片PIC單片機(jī)為核心完成了基于RS232 串口的讀卡器的硬件設(shè)計(jì)。
上傳時(shí)間： 2014-04-14
上傳用戶：wanghui2438
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