為了有效地提升鉛酸蓄電池的使用壽命,同時實現(xiàn)對充電過程的監(jiān)控,設(shè)計出一種用單片機(jī)控制的36 V鉛酸蓄電池充電電源。本電路采用反激式拓?fù)洌B續(xù)電流工作模式,電源管理IC設(shè)計在電源的副邊,由ELAN公司的EM78P258N單片機(jī)模擬,是用可編程器件模擬電源管理IC,實現(xiàn)智能電源低成本化的一次成功嘗試,通過對單片機(jī)的軟件設(shè)計實現(xiàn)了充電電源的狀態(tài)顯示、充電時間控制、報警、過溫保護(hù)、過壓保護(hù)、過流保護(hù)等功能。本充電器真正的實現(xiàn)了鉛酸蓄電池的三段式充電過程,其最高輸出功率可達(dá)90 W,效率約85%,成本不到20元,具有很高的市場競爭力。 Abstract: In order to extend the life of lead-acid battery efficiently and supervise the charging process meanwhile, a 36V lead-acid battery charge powe supply controlled by microcontroller is designed. The charger is flyback switching power supply and works in CCM mode. A EM78P258N microcontroller made by ELAN microelectronics corporation is used as power management IC which is designed at the secondary circuit. The project is a successful attempt to low-cost intelligent power used microcontroller simulating power management IC. The charger also has the functions of the status reveal, charge time control, alarming, thermal protect, current limit and overvoltage protect by the software design. The circuit actually implements the three-step charge process, whose power is up to 90W and whose efficiency can get 85%. The net cost of this charger is less than 20 RMB, so that the charger is of powerful market competitiveness.
標(biāo)簽: 單片機(jī)控制 充電電源 鉛酸蓄電池
上傳時間: 2013-11-16
上傳用戶:cepsypeng
介紹了一種用單片機(jī)控制的智能微波信號源發(fā)生器,以美國國家半導(dǎo)體公司的低功率,高性能的δ-Σ小數(shù)分頻數(shù)字鎖相環(huán)電路LMX2485和YTO為核心構(gòu)成.微波信號源的工作頻率范圍為8~14GHz,頻率分辨率為40GHz.分析了設(shè)計方案及實現(xiàn)過程中的關(guān)鍵技術(shù),給出了部分實驗結(jié)果.
標(biāo)簽: 單片機(jī)控制 微波信號 源發(fā)生器
上傳時間: 2013-10-20
上傳用戶:banlangen
摘要:本文介紹了一種基于單片機(jī)和測量電壓真有效值方案設(shè)計的智能數(shù)字交流毫伏表。它能精確測量任意波形的低頻模擬周期信號并同時顯示其有效值和分貝值。具有智能量程轉(zhuǎn)換功能。 關(guān)鍵詞:單片機(jī) 數(shù)字毫伏表 真有效值 智能量程轉(zhuǎn)換
上傳時間: 2013-11-09
上傳用戶:gaoqinwu
從系統(tǒng)硬件設(shè)計和軟件構(gòu)成上,介紹一種以AT89C52單片機(jī)為核心,通過無線遙控方法實現(xiàn)對預(yù)設(shè)電話自動撥號報警的智能呼救系統(tǒng)。系統(tǒng)提供了患者在緊急情況下無法使用電話報警時的一種報警手段。由用戶預(yù)設(shè)的多組電話號碼作為語音報警對象,預(yù)錄可長達(dá)20 s的語音信號來說明患者所處地點及病情,并通知患者家人。 Abstract: This paper introduces a intelligent alarming system which is realized by wireless remote control system.This system chiefly consists of AT89C51 the system can processor.User can input several groups of telephone number regarded as alarming objects,The system can record some information 20 seconds to tell the site of the patient.And notice the rokonok of the patient.
上傳時間: 2013-11-19
上傳用戶:wd450412225
介紹了電力操作電源與智能電池巡檢系統(tǒng)的特點,給出了一種基于超低功耗單片機(jī)MSP430 F149針對中小型變電站自動化運行的專用設(shè)備的基本設(shè)計原理及實現(xiàn)方法,最后給出了詳細(xì)硬件構(gòu)成和軟件實現(xiàn)。該系統(tǒng)能滿足中小型變電站安全、可靠、自動運行的要求,并通過與上位機(jī)的串行通信實現(xiàn)變電站的遠(yuǎn)程管理和控制。 Abstract: The characters of the intelligent battery data logging system of the electric operation power are introduced.The basic design principle and the implemented methods of the special equipment which only designed for the middle or small transformer substation based on MSP430F149 are prescribed. Finally, the hardware block diagram and the software flow chart are also given. The function that the system finally needs to realize can basically meet with the middle or small transformer substation’s satisfy, reliably,and automatic running.And it can also realize the transformer substation long-distance management and control by serial communicating with the host computer.
上傳時間: 2013-11-25
上傳用戶:黃華強(qiáng)
出了一種利用ATmega8單片機(jī)對ISD2500系列語音芯片進(jìn)行控制的智能語音系統(tǒng),此系統(tǒng)使用靈活,易于功能升級,具有良好的應(yīng)用前景。提供了硬件連接電路和關(guān)鍵源程序。 Abstract: An intelligent voice system using ISD2500 series voice chips based on ATmega8 MCU is described.This system is flexible and easy to upgrade for users,and it has pretty good using foreground. The circuit diagram and the key program are also provided.
標(biāo)簽: ATmega8 2500 ISD 智能語音
上傳時間: 2014-01-22
上傳用戶:Artemis
DS1991是一種多密鑰信息紐扣,文章介紹了DS1991的主要特點、工作原理及讀寫方法。給出了一種基于DS1991和PIC單片機(jī)的智能水卡設(shè)計方案,同時給出了整個系統(tǒng)的硬件組成原理和軟件設(shè)計方法。 Abstract: DS1991 is a multikey iButton. The characteristic operation principle and the way of read/write of DS1991 are introduced in the paper. A smart water card based on DS1991 and PIC singlechip is presented the design of hardware and software are also given
上傳時間: 2013-11-06
上傳用戶:李彥東
對智能儀器系統(tǒng)中的在系統(tǒng)編程(ISP)技術(shù)及其在儀器系統(tǒng)中在線編程的實現(xiàn)、應(yīng)用前景等進(jìn)行了分析。介紹了P89C669相對于傳統(tǒng)51系列單片機(jī)的增強(qiáng)特性,并給出P89C669快閃存儲器的ISP實現(xiàn)電路和具體方法。結(jié)合實際介紹了一種可以在系統(tǒng)編程的智能鍵盤、數(shù)碼管顯示系統(tǒng)。
標(biāo)簽: 系統(tǒng)編程 智能鍵盤 數(shù)碼管 顯示系統(tǒng)
上傳時間: 2013-12-27
上傳用戶:LouieWu
介紹了一種基于BF561的智能視頻監(jiān)控器的設(shè)計和實現(xiàn)。給出了系統(tǒng)的總體結(jié)構(gòu)、系統(tǒng)各部分的硬件組成以及系統(tǒng)的主要算法和軟件實現(xiàn)。測試結(jié)果表明,本設(shè)計具有良好的實時性、穩(wěn)定性和準(zhǔn)確性,可用于視頻監(jiān)控業(yè)務(wù)。
標(biāo)簽: 561 BF 智能視頻監(jiān)控 儀的設(shè)計
上傳時間: 2013-11-15
上傳用戶:baitouyu
摘要:傳統(tǒng)的門鎖既要備有大量的鑰匙,又要擔(dān)心鑰匙丟失后的麻煩。隨著單片機(jī)的問世,出現(xiàn)了帶微處理器的密碼鎖,它除具有電子密碼鎖的功能外,還引入了智能化、科技化等功能,從而使密碼鎖具有很高的安全性、可靠性,受到了廣大用戶的親睞。本文介紹一種基于單片機(jī)和串行EEPROM的智能密碼鎖,對系統(tǒng)硬件設(shè)計和軟件實現(xiàn)進(jìn)行了詳細(xì)的描述。該系統(tǒng)采用STC89C51單片機(jī)和AT24C02串行EEPROM,通過STC89C51模擬I2C總線和AT24C02通訊來讀取存儲的密碼,用戶通過鍵盤輸入的密碼,實現(xiàn)密碼鎖的功能。
標(biāo)簽: EEPROM 單片機(jī) 串行 密碼鎖
上傳時間: 2013-12-09
上傳用戶:JasonC
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