本文介紹了一種基于單片機(jī)的智能穩(wěn)壓電源的設(shè)計(jì)方案，其核心技術(shù)是通過(guò)單片機(jī)控制數(shù)模轉(zhuǎn)換來(lái)改變其后的穩(wěn)壓模塊的輸出。該系統(tǒng)由整流濾波初步穩(wěn)壓部分、單片機(jī)控制部分、DAC和顯示部分組成，該穩(wěn)壓電源能連續(xù)步進(jìn)可調(diào)，并且可實(shí)時(shí)顯示，彌補(bǔ)了傳統(tǒng)穩(wěn)壓電源的不足。
標(biāo)簽： 單片機(jī) 智能穩(wěn)壓電源
上傳時(shí)間： 2014-12-26
上傳用戶：yl1140vista
為解決電致變色器件的顏色變化受外界環(huán)境顏色控制的問(wèn)題，設(shè)計(jì)了一種基于單片機(jī)的便攜式顏色自適應(yīng)識(shí)別電路。與傳統(tǒng)顏色識(shí)別電路相比較，該電路利用數(shù)字式的顏色傳感器來(lái)獲取外界環(huán)境顏色，產(chǎn)生的數(shù)字顏色信號(hào)易于單片機(jī)進(jìn)行處理。在電路中，下位機(jī)部分主要負(fù)責(zé)獲取電致變色器件變色參數(shù)及控制電致變色器件的顏色變化;而上位機(jī)部分主要負(fù)責(zé)把下位機(jī)獲取的電致變色器件變色參數(shù)進(jìn)行電壓到顏色的曲線擬合，并通過(guò)藍(lán)牙通信把擬合曲線參數(shù)傳遞給下位機(jī)。結(jié)果表明，該電路能自動(dòng)根據(jù)環(huán)境顏色提供-4~4 V范圍步進(jìn)為0.1 V的電壓來(lái)驅(qū)動(dòng)電致變色器件的顏色顯示，與傳統(tǒng)的顏色識(shí)別電路設(shè)計(jì)相比，識(shí)別的精度和速度都得到了明顯改善。 Abstract: In this paper， a portable adaptive circuit for color identification(PACCI) based on MCU was designed. Compared to the traditional color identification circuit， the PACCI adopts digital sensor to detect the color data from external environment and further generate digital color data， which can be processed easily by MCU. In PACCI， the slave is mainly responsible for detecting the color parameters of the corresponding elcreochromic device and further driving it. For the master， which is mainly responsible for the color curve fitting based on the parameters of the electrochromic device， and transmits the fitting parameters to the slave through the bluetooth device. The results show that the PACCI can provide the basis voltage range from -4V to 4V automatically based on the colors of external environment with step as 0.1V to drive the corresponding electrochromic device. Compared to the traditional color recognition circuit， the recognition accuracy and speed of PACCI have been improved significantly.
上傳時(shí)間： 2013-11-09
上傳用戶：franktu
針對(duì)目前普通日光燈因不能調(diào)節(jié)光強(qiáng)而造成的能源浪費(fèi)問(wèn)題，設(shè)計(jì)了一種基于單片機(jī)的新型節(jié)能日光燈系統(tǒng)，該系統(tǒng)主要分為3個(gè)部分，首先采集外界光強(qiáng)信息并將數(shù)據(jù)傳至單片機(jī)；隨后單片機(jī)根據(jù)輸入量的不同調(diào)整輸出的PWM波；最后日光燈控制電路通過(guò)PWM波的控制，調(diào)節(jié)日光燈兩端的電壓，控制日光燈輸出的光強(qiáng)，使日光燈隨外界光強(qiáng)的變化而自動(dòng)調(diào)整照射光強(qiáng)。經(jīng)過(guò)不同外界環(huán)境的實(shí)驗(yàn)調(diào)試，在滿足使用者的用光要求的前提下，日光燈工作穩(wěn)定，功率明顯降低，適宜推廣使用。
標(biāo)簽： 單片機(jī) 節(jié)能 日光燈 系統(tǒng)設(shè)計(jì)
上傳時(shí)間： 2013-10-29
上傳用戶：蒼山觀海
為了實(shí)現(xiàn)把軟件仿真的數(shù)據(jù)通過(guò)PCI總線DMA傳輸、處理后轉(zhuǎn)換成高速視頻串行數(shù)據(jù)流（LVDS數(shù)據(jù)流），設(shè)計(jì)出了基于PCI9054的數(shù)據(jù)轉(zhuǎn)換模塊。通過(guò)介紹PCI總線接口協(xié)議芯片PCI9054的性能、特點(diǎn)，分析了windows的WDM驅(qū)動(dòng)程序的特點(diǎn)，在軟硬件設(shè)計(jì)中采用把數(shù)據(jù)緩存器設(shè)置為兩組SRAM的結(jié)構(gòu)，兩組SRAM交替進(jìn)行數(shù)據(jù)存取的方式，有效克服了數(shù)據(jù)流不連續(xù)的現(xiàn)象，解決了形成不間斷數(shù)據(jù)流和兩次DMA傳輸之間的數(shù)據(jù)間斷問(wèn)題。應(yīng)用結(jié)果表明，該設(shè)計(jì)可滿足數(shù)字視頻帶寬20 MHz以?xún)?nèi)的LVDS數(shù)據(jù)流的轉(zhuǎn)換與傳輸。
標(biāo)簽： 9054 PCI 數(shù)據(jù)轉(zhuǎn)換 模塊設(shè)計(jì)
上傳時(shí)間： 2014-12-26
上傳用戶：jisujeke
基于單片機(jī)的住宅電子服務(wù)系統(tǒng)
標(biāo)簽： 單片機(jī) 電子 服務(wù)系統(tǒng)
上傳時(shí)間： 2013-10-27
上傳用戶：yanyueshen
設(shè)計(jì)一種基于P89V51RD2的功率因數(shù)測(cè)量?jī)x，采用光電隔離器和專(zhuān)用數(shù)碼管驅(qū)動(dòng)器。該測(cè)量?jī)x是以增強(qiáng)型單片機(jī)P89V51RD2為核心，大大簡(jiǎn)化系統(tǒng)硬件設(shè)計(jì)。而軟件部分采用模塊化設(shè)計(jì)思想，采用中值濾波和小數(shù)補(bǔ)償算法，實(shí)現(xiàn)功率因數(shù)的高精度測(cè)量。實(shí)驗(yàn)測(cè)試表明，該功率因數(shù)測(cè)量?jī)x測(cè)量精度高，運(yùn)行穩(wěn)定可靠。 Abstract: A power－factor measurement instrument based on P89V51RD2is designed，which uses optical coupler and specific LED drive chip.The power factor measurement instrument uses P89V51RD2as a core of which greatly simplifies the system design.Furthermore，modularization software is developed in detail.The high precision power－factor measuring system is realized by the center value filter and fractional compensation algorithm.Experiments manifests that the power－ factor measurement instrument is high precision，steady and reliable.
上傳時(shí)間： 2014-12-27
上傳用戶：CHINA526
針對(duì)盤(pán)山路存在的轉(zhuǎn)彎盲區(qū)，即在轉(zhuǎn)彎時(shí)司機(jī)無(wú)法得知彎路對(duì)面是否有車(chē)輛通過(guò)，設(shè)計(jì)一種基于C8051F310的山路轉(zhuǎn)彎預(yù)防警示系統(tǒng)。該系統(tǒng)利用一階濾波算法檢測(cè)山路轉(zhuǎn)彎時(shí)是否有車(chē)輛通過(guò)。運(yùn)用該算法可增強(qiáng)系統(tǒng)檢測(cè)的實(shí)時(shí)性，提高檢測(cè)機(jī)動(dòng)車(chē)輛的靈敏度，同時(shí)大大減少環(huán)境溫度對(duì)檢測(cè)的干擾。試驗(yàn)表明該系統(tǒng)能夠正確指示出在山路轉(zhuǎn)彎時(shí)是否有車(chē)輛通過(guò)，目前該系統(tǒng)已安裝在盤(pán)山路上，可大大減少事故的發(fā)生率。 Abstract: Aiming at passing hilly road，there is a turn blind spot.Motormen usually do not know if the passing of vehicles pass the road.So a system of defending accident on hilly road is designed,which is based on MCU C8051F310.The sys-tem uses the first-order filter algorithm to detect whether there are passing vehicles.This algorithm enhances the real-time detection and improves the sensitivity of detection vehicles.Meanwhile,it reduces the detection interference of environmen-tal temperature.The experimental results show that this system can exactly indicate if there are passing vehicles.At present,the system has been successfully applied to hilly road.The system can greatly decrease accident.
上傳時(shí)間： 2013-10-10
上傳用戶：歸海惜雪
介紹了當(dāng)前普通標(biāo)記機(jī)控制系統(tǒng)現(xiàn)狀及其存在缺點(diǎn)，給出氣動(dòng)標(biāo)記機(jī)及相頻修正PWM模式的工作原理。采用ATmega16單片機(jī)和USB轉(zhuǎn)換RS232接口器件CH341T實(shí)現(xiàn)驅(qū)動(dòng)控制系統(tǒng)與PC的實(shí)時(shí)通訊，標(biāo)記控制系統(tǒng)可升級(jí)到USB接口。采用基于ATmega16的相頻修正PWM替換555振蕩電路產(chǎn)生的PWM，可直接通過(guò)軟件調(diào)整PWM信號(hào)。使用達(dá)林頓三極管TIP122替代直流繼電器驅(qū)動(dòng)高頻電磁閥，使得電磁閥驅(qū)動(dòng)電路簡(jiǎn)單，成本低廉。該控制系統(tǒng)已成功應(yīng)用于氣動(dòng)標(biāo)記機(jī)。 Abstract: In this paper,the actuality and demerit of the common gas marking machine control systems are described.The operation principle of the gas marking machine and the phase and frequency correct PWM of ATmega16is introduced.The real-time communication between the driving control system and PC by CH341T which its function is translated USB to RS232is realized,the control systems is updated grade to USB interface.The PWM signal can be adjustable by software for the555surge circuit was substituted by the phase and frequency.The high frequency electromagnetic value’s driving circuit by DC relay is replaced by TIP122,therefore,the circuit is become simple and the cost cheap.The control systems has been widely used in gas marking machine.
標(biāo)簽： ATmega 16 標(biāo)記 控制系統(tǒng)
上傳時(shí)間： 2013-10-18
上傳用戶：1427796291
提出一種基于C8051F040的炮塔方位角測(cè)試系統(tǒng)的設(shè)計(jì)方案，給出測(cè)試系統(tǒng)的各個(gè)模塊軟硬件設(shè)計(jì)。炮塔方位角測(cè)試系統(tǒng)集數(shù)據(jù)采集，數(shù)據(jù)傳輸和數(shù)據(jù)顯示等功能于一體，實(shí)現(xiàn)了炮塔方位角裝置的離線檢測(cè)。系統(tǒng)軟件采用C51編寫(xiě)，對(duì)單片機(jī)進(jìn)行有效電源管理，保證了系統(tǒng)的穩(wěn)定性，可靠性。 Abstract: This paper puts forwards a design of artillery position system based on C8051F040，describes all modules hardware and software design of measurement system.The system has the function of information collection，transmission，and display.It can measure artillery position system in offline.The system software using C51can manage the power of single chip microcomputer，guarantee the stability，reliability.
標(biāo)簽： C8051F040 方位角 測(cè)試系統(tǒng)
上傳時(shí)間： 2014-12-27
上傳用戶：7891
介紹基于VHDL的微型打印機(jī)控制器的設(shè)計(jì)。論述了微型打印機(jī)的基本原理，以及實(shí)現(xiàn)控制器的VHDL語(yǔ)言設(shè)計(jì)。打印機(jī)的數(shù)據(jù)來(lái)自系統(tǒng)中的存儲(chǔ)模塊，根據(jù)需要控制打印。該微型打印機(jī)控制器可取代傳統(tǒng)的微型打印機(jī),且抗干擾性好,可靠性高，具有較強(qiáng)的移植性，稍加改動(dòng)就可應(yīng)用于不同場(chǎng)合。 Abstract: This paper introduced the design method of micro printer controller based on VHDL.The basic principles of microprinter is explained,as well as the realization of the controller by VHDL language.The printer data is from the system memory modules,can control printer.The design of microprinter controller has antigood and high reliability，it can replace the traditional printer.The controller has very good portability,and need little modify that can use in different situation.
標(biāo)簽： VHDL 微型打印機(jī) 制器設(shè)計(jì)
上傳時(shí)間： 2013-11-03
上傳用戶：dudu1210004
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