高壓雙管反激變換器的設(shè)計(jì):介紹一種雙管反激的電路拓?fù)洌治隽似涔ぷ髟恚o出了一些關(guān)鍵技術(shù)參數(shù)的計(jì)算公式，設(shè)計(jì)并研制成功的30W 380V AC5 0H z/510V DC/+15.1 V DC(1A )、+5.2VDC(2A)輔助開(kāi)關(guān)電源具有功率密度高、變換效率高、可靠性高等優(yōu)良的綜合性能。該變換器在高電壓輸人情況下有重要的應(yīng)用價(jià)值。【關(guān) 鍵 詞 】變換器，輔助開(kāi)關(guān)電源，雙管反激 [Abstract】 A n e wt opologyfo rd oubles witchfl ybackc onverteris in troduced.Th eo perationp rincipleis a nalyzeda nds ome for mulas for calculating key parameters for the topology are presented. The designed and produced auxiliary switching power supply,i. e. 30W 380V AC5 0H z/5 10V DC/+15.1 V DC《1A )、+5.2 V DC《2A )，hase xcellentc omprehensivep erformances sucha sh ighp owerd ensity, hi ghc onversione fficiencya ndh ighr eliability.Th isc onverterh asim portanta pplicationv aluef orh igh input voltag [Keywords ]converter,au xiliary switchingp owers upply,do ubles witchf lybac
上傳時(shí)間： 2013-11-01
上傳用戶(hù)：Ants
基于LabVIEW和單片機(jī)的空調(diào)溫度場(chǎng)測(cè)量系統(tǒng)的研究:室內(nèi)溫度是空調(diào)系統(tǒng)舒適性的重要指標(biāo),對(duì)其及時(shí)、準(zhǔn)確地測(cè)量顯得非常重要。介紹單片機(jī)AT89C51 和數(shù)字式、單總線(xiàn)型溫度傳感器DS18B20 組成矩形測(cè)量網(wǎng)絡(luò)采集空調(diào)室內(nèi)40 點(diǎn)溫度,LabVIEW作為開(kāi)發(fā)平臺(tái),二者之間通過(guò)串口實(shí)現(xiàn)數(shù)據(jù)通信,利用LabVIEW強(qiáng)大的數(shù)據(jù)處理和顯示功能對(duì)采集的空調(diào)溫度場(chǎng)數(shù)據(jù)進(jìn)行實(shí)時(shí)處理、分析和顯示,詳細(xì)介紹了系統(tǒng)的硬件結(jié)構(gòu)和軟件模塊的設(shè)計(jì)方案。關(guān)鍵詞:單片機(jī);DS18B20 ;LabVIEW;串行通信 Abstract : Temperature is a very important criterion of air condition system′s comfort , so it is very significant to measure it accurately and real timely. This paper int roduces a data acquisition system of measuring 40 point s temperature for air condition room based on single wire digital sensor DS18B20 and microcont roller AT89C51 which are composed of rectangle measuring meshwork. The data communication between LabVIEW and microcont roller is executed via serial port ,and the temperature field data of air condition room are processed analyzed and displayed on LabVIEW. The hardware and software modules are also given in detail.Keywords : single chip ;DS18B20 ;LabVIEW; serial communication
標(biāo)簽： LabVIEW 單片機(jī) 空調(diào) 溫度場(chǎng)
上傳時(shí)間： 2014-05-05
上傳用戶(hù)：KSLYZ
基于單片機(jī)的步進(jìn)電機(jī)開(kāi)環(huán)控制系統(tǒng):通過(guò)ATMEL89C51單片機(jī)對(duì)步進(jìn)電機(jī)進(jìn)行控制,主要介紹了步進(jìn)電機(jī)控制器、驅(qū)動(dòng)電路和LED顯示電路的設(shè)計(jì),實(shí)現(xiàn)了步進(jìn)電機(jī)的開(kāi)環(huán)控制。在步進(jìn)電機(jī)控制器的設(shè)計(jì)中,重點(diǎn)闡述了脈沖產(chǎn)生電路以及對(duì)速度的控制。該系統(tǒng)具有成本低、控制方便的特點(diǎn)。關(guān)鍵詞: 單片機(jī); 步進(jìn)電機(jī); 開(kāi)環(huán)控制 Abstract: The design using ATMEL89C51 single chip to control the step2motor with its controller, driving circuit and LED disp lay circuit to realize step motor open2loop controlwere introduced. For the controller in this design,the circuit to p roduce pulse and the speed controlwere expatiated emphatically. This system possesses features of lower cost, easier control.Key words: single ch ip; step2motor; open2loop con trol
標(biāo)簽： 單片機(jī) 步進(jìn)電機(jī) 開(kāi)環(huán) 控制系統(tǒng)
上傳時(shí)間： 2013-10-13
上傳用戶(hù)：cicizoe
基于單片機(jī)的除塵控制器的設(shè)計(jì):介紹通用控制儀的硬件組成和軟件設(shè)計(jì),闡述了系統(tǒng)的性能指標(biāo)和功能特點(diǎn)。該產(chǎn)品功能完善,可靠性高,具有很好的應(yīng)用前景。關(guān)鍵詞: 除塵器;通用控制儀;單片機(jī);系統(tǒng)設(shè)計(jì) Abstract: The hardware structure and the software design are introduced in this paper, and the performance index and the features of the system are expounded. It has comp rehensive functions, high reliability and good app lication.Key words: dust catcher; universal controller; microcontroller; system design
上傳時(shí)間： 2013-11-16
上傳用戶(hù)：ming52900
文章提出了一種精簡(jiǎn)指令集8 位單片機(jī)中, 算術(shù)邏輯單元的工作原理。在此基礎(chǔ)上, 對(duì)比傳統(tǒng)PIC 方案、以及在ALU 內(nèi)部再次采用流水線(xiàn)作業(yè)的332 方案、44 方案, 并用Synopsys 綜合工具實(shí)現(xiàn)了它們。綜合及仿真結(jié)果表明, 根據(jù)該單片機(jī)系統(tǒng)要求, 44 方案速度最高, 比332 方案可提高43.9%, 而面積僅比最小的332 方案增加1.6%。在分析性能差異的根本原因之后, 闡明了該方案的優(yōu)越性。關(guān)鍵詞: 單片機(jī), 精簡(jiǎn)指令集, 算術(shù)邏輯單元, 流水線(xiàn) Abstract: Work principle for ALU in an 8_bit RISC Singlechip microcomputer is described. The traditional PIC scheme, 332 Pipeline scheme and 44 Pipeline scheme are compared on the base of the principle, which are implemented using Synopsys design tools. Results from synthesis and simulation shows that 44 scheme operates the fast, which is 43.9% faster and only 1.6% larger than 332 scheme. The essential reason why the performance is so different is analyzed.Then the advantage of 44 scheme is clarified.Key words: Singlechip, Microcomputer, RISC, ALU, Pipeline
上傳時(shí)間： 2013-10-18
上傳用戶(hù)：xiaoyaa
針對(duì)無(wú)位置傳感器無(wú)刷直流電機(jī)的位置檢測(cè)問(wèn)題，本文應(yīng)用單片機(jī)成功地實(shí)現(xiàn)了一種軟件檢測(cè)方法，并給出了實(shí)測(cè)波形加以驗(yàn)證。關(guān)鍵詞： 無(wú)刷直流電機(jī) 無(wú)傳感器 位置檢測(cè)Abstract: As to the position-detecting problem of sensorless brushless DC motor, a softwarerealization by microcomputer is proposed successfully in the paper. Experiment results are also presented to verify the method.Keywords: brushless DC motor, sensorless, position detecting
標(biāo)簽： BLDCM 無(wú)傳感器 位置檢測(cè) 單片機(jī)軟件
上傳時(shí)間： 2013-11-01
上傳用戶(hù)：aappkkee
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(xiàn)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(hù)：wanghui2438
一種實(shí)用的微機(jī)自動(dòng)配料秤系統(tǒng):介紹一種由單片機(jī)構(gòu)成的配料秤。敘述了秤的傳感器、變送器、信號(hào)的變換、硬件原理、軟件流程以及和DCS 系統(tǒng)構(gòu)成的單回路調(diào)節(jié)系統(tǒng),此系統(tǒng)可廣泛地應(yīng)用于各行業(yè)的配料控制中。關(guān)鍵詞:配料秤 單片機(jī) 單回路調(diào)節(jié)系統(tǒng) DCS 系統(tǒng) Abstract :A proportioning weigher based on single chip computer is introduced. Sensors , transmitters , signal converting , principle of hardware ,software flowchart of proportioning weigher and single loop control system composed with DCS system are emphasized ,this system can be used in proportioning control of various trades extensively.Key Words :Proportioning Weigher ,Single Chip Computer ,Single Loop Control System ,Distributed Control System
上傳時(shí)間： 2013-10-12
上傳用戶(hù)：zwei41
基于單片機(jī)控制的二氧化碳濃度測(cè)試計(jì):基于CDM4161二氧化碳?xì)怏w濃度測(cè)試模塊以及ATtiny26單片機(jī),提出了一種二氧化碳濃度測(cè)試計(jì)的設(shè)計(jì)方案。該方案具有硬件電路簡(jiǎn)單、成本低、可靠性高、測(cè)量準(zhǔn)確等優(yōu)點(diǎn)，具有較高的實(shí)用價(jià)值。 Abstract: Abstract：A desigh scheme of CO2 concentration meter based on CDM4161carbon dioxide concentration test module and ATtiny26micro-controller is presented in this paper.The design scheme features simple hardware circuit,low-cost,high reli-ability，accurate measurement and it has a high practical value.
標(biāo)簽： 單片機(jī)控制 二氧化碳 測(cè)試
上傳時(shí)間： 2013-11-14
上傳用戶(hù)：zjwangyichao
Abstract: This application note explains the hardware of different types of 1-Wire® interfaces and software examples adapted to this hardware with a focus on serial ports. Depending on the types of iButtons required for a project and the type of computer to be used, the most economical interface is easily found. The hardware examples shown are basically two different types: 5V general interface and 12V RS-232 interface. Within the 5V group a common printed circuit board could be used for all circuits described. The variations can be achieved by different populations of components. The same principal is used for the 12V RS-232 interface. The population determines if it is a Read all or a Read/Write all type of interface. There are other possible circuit implementations to create a 1-Wire interface. The circuits described in this application note cover many different configurations. For a custom application, one of the described options can be adapted to meet individual needs.
標(biāo)簽： iButtons Reading Writing and
上傳時(shí)間： 2013-10-29
上傳用戶(hù)：long14578
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