本文介紹了基于單片機(jī)AT89C51 的溫度控制系統(tǒng)的設(shè)計(jì)方案與軟硬件實(shí)現(xiàn)。采用溫度傳感器DS18B20 采集溫度數(shù)據(jù),液晶顯示屏LCM1602 顯示溫度數(shù)據(jù),AT24C02B 存儲(chǔ)溫度上下限設(shè)定
標(biāo)簽: Implementation Temperature SingleChip Control
上傳時(shí)間: 2013-06-03
上傳用戶:xoxoliguozhi
ASIC對(duì)產(chǎn)品成本和靈活性有一定的要求.基于MCU方式的ASIC具有較高的靈活性和較低的成本,然而抗干擾性和可靠性相對(duì)較低,運(yùn)算速度也受到限制.常規(guī)ASIC的硬件具有速度優(yōu)勢(shì)和較高的可靠性及抗干擾能力,然而不是靈活性較差,就是成本較高.與傳統(tǒng)硬件(CHW)相比,具有一定可配置特性的場(chǎng)可編程門(mén)陣列(FPGA)的出現(xiàn),使建立在可再配置硬件基礎(chǔ)上的進(jìn)化硬件(EHW)成為智能硬件電路設(shè)計(jì)的一種新方法.作為進(jìn)化算法和可編程器件技術(shù)相結(jié)合的產(chǎn)物,可重構(gòu)FPGA的研究屬于EHW的研究范疇,是研究EHW的一種具體的實(shí)現(xiàn)方法.論文認(rèn)為面向分類的專用類可重構(gòu)FPGA(ASR-FPGA)的研究,可使可重構(gòu)電路粒度劃分的針對(duì)性更強(qiáng)、設(shè)計(jì)更易實(shí)現(xiàn).論文研究的可重構(gòu)FPGA的BCH通訊糾錯(cuò)碼進(jìn)化電路是一類ASR-FPGA電路的具體方法,具有一定的實(shí)用價(jià)值.論文所做的工作主要包括:(1)BCH編譯碼電路的設(shè)計(jì)——求取實(shí)驗(yàn)用BCH碼的生成多項(xiàng)式和校驗(yàn)多項(xiàng)式及其相應(yīng)的矩陣并構(gòu)造實(shí)驗(yàn)用BCH碼;(2)建立基于可重構(gòu)FPGA的基核——構(gòu)造具有可重構(gòu)特性的硬件功能單元,以此作為可重構(gòu)BCH碼電路的設(shè)計(jì)基礎(chǔ);(3)構(gòu)造實(shí)現(xiàn)可重構(gòu)BCH糾錯(cuò)碼電路的方法——建立可重構(gòu)糾錯(cuò)碼硬件電路算法并進(jìn)行實(shí)驗(yàn)驗(yàn)證;(4)在可重構(gòu)糾錯(cuò)碼電路基礎(chǔ)上,構(gòu)造進(jìn)化硬件控制功能塊的結(jié)構(gòu),完成各進(jìn)化RLA控制模塊的驗(yàn)證和實(shí)現(xiàn).課題是將可重構(gòu)BCH碼的編譯碼電路的實(shí)現(xiàn)作為一類ASR-FPGA的研究目標(biāo),主要成果是根據(jù)可編程邏輯電路的特點(diǎn),選擇一種可編程樹(shù)的電路模型,并將它作為可重構(gòu)FPGA電路的基核T;通過(guò)對(duì)循環(huán)BCH糾錯(cuò)碼的構(gòu)造原理和電路結(jié)構(gòu)的研究,將基核模型擴(kuò)展為能滿足糾錯(cuò)碼電路需要的糾錯(cuò)碼基本功能單元T;以T作為再劃分的基本單元,對(duì)FPGA進(jìn)行"格式化",使T規(guī)則排列在FPGA上,通過(guò)對(duì)T的控制端的不同配置來(lái)實(shí)現(xiàn)糾錯(cuò)碼的各個(gè)功能單元;在可重構(gòu)基核的基礎(chǔ)上提出了糾錯(cuò)碼重構(gòu)電路的嵌套式GA理論模型,將嵌套式GA的染色體串作為進(jìn)化硬件描述語(yǔ)言,通過(guò)轉(zhuǎn)換為相應(yīng)的VHDL語(yǔ)言描述以實(shí)現(xiàn)硬件電路;采用RLA模型的有限狀態(tài)機(jī)FSM方式實(shí)現(xiàn)了可重構(gòu)糾錯(cuò)碼電路的EHW的各個(gè)控制功能塊.在實(shí)驗(yàn)方面,利用Xilinx FPGA開(kāi)發(fā)系統(tǒng)中的VHDL語(yǔ)言和電路圖相結(jié)合的設(shè)計(jì)方法建立了循環(huán)糾錯(cuò)碼基核單元的可重構(gòu)模型,進(jìn)行循環(huán)糾錯(cuò)BCH碼的電路和功能仿真,在Xilinx公司的Virtex600E芯片進(jìn)行了FPGA實(shí)現(xiàn).課題在研究模型上選取的是比較基本的BCH糾錯(cuò)碼電路,立足于解決基于可重構(gòu)FPGA核的設(shè)計(jì)的基本問(wèn)題.課題的研究成果及其總結(jié)的一套ASR-FPGA進(jìn)化硬件電路的設(shè)計(jì)方法對(duì)實(shí)際的進(jìn)化硬件設(shè)計(jì)具有一定的實(shí)際指導(dǎo)意義,提出的基于專用類基核FPGA電路結(jié)構(gòu)的研究方法為新型進(jìn)化硬件的器件結(jié)構(gòu)的設(shè)計(jì)也可提供一種借鑒.
標(biāo)簽: FPGA 可重構(gòu) 通訊 糾錯(cuò)
上傳時(shí)間: 2013-07-01
上傳用戶:myworkpost
本文闡述了硝酸生產(chǎn)聯(lián)鎖報(bào)警控制系統(tǒng)的意義,介紹了系統(tǒng)的特性和要求,提出了生產(chǎn)聯(lián)鎖報(bào)警的實(shí)現(xiàn)線路,給出了PLC實(shí)現(xiàn)的部分流程。現(xiàn)場(chǎng)應(yīng)用表明系統(tǒng)可靠實(shí)用。關(guān)鍵詞:PLC ;聯(lián)鎖;報(bào)警;硝酸
標(biāo)簽: Realization nitric-acid PLC interlock
上傳時(shí)間: 2013-07-07
上傳用戶:xingisme
·【英文題名】 Search of Double-fed Machine Variable Speed System Based on DSP 【作者中文名】 沈睿; 【導(dǎo)師】 廖冬初; 【學(xué)位授予單位】 湖北工業(yè)大學(xué); 【學(xué)科專業(yè)名稱】 控制理論與控制工程 【學(xué)位年度】 2007 【論文級(jí)別】 碩士 【網(wǎng)絡(luò)出版投稿人】 湖北工業(yè)大學(xué) 【網(wǎng)絡(luò)出版投稿時(shí)間】 2008-09-27 【關(guān)鍵詞】 雙饋調(diào)速
標(biāo)簽: DSP 雙饋 電機(jī)調(diào)速系統(tǒng)
上傳時(shí)間: 2013-04-24
上傳用戶:hanwu
特點(diǎn): 精確度0.1%滿刻度 可作各式數(shù)學(xué)演算式功能如:A+B/A-B/AxB/A/B/A&B(Hi or Lo)/|A|/ 16 BIT類比輸出功能 輸入與輸出絕緣耐壓2仟伏特/1分鐘(input/output/power) 寬范圍交直流兩用電源設(shè)計(jì) 尺寸小,穩(wěn)定性高
標(biāo)簽: 微電腦 數(shù)學(xué)演算 隔離傳送器
上傳時(shí)間: 2014-12-23
上傳用戶:ydd3625
Radio Frequency Integrated Circuit Design I enjoyed reading this book for a number of reasons. One reason is that itaddresses high-speed analog design in the context of microwave issues. This isan advanced-level book, which should follow courses in basic circuits andtransmission lines. Most analog integrated circuit designers in the past workedon applications at low enough frequency that microwave issues did not arise.As a consequence, they were adept at lumped parameter circuits and often notcomfortable with circuits where waves travel in space. However, in order todesign radio frequency (RF) communications integrated circuits (IC) in thegigahertz range, one must deal with transmission lines at chip interfaces andwhere interconnections on chip are far apart. Also, impedance matching isaddressed, which is a topic that arises most often in microwave circuits. In mycareer, there has been a gap in comprehension between analog low-frequencydesigners and microwave designers. Often, similar issues were dealt with in twodifferent languages. Although this book is more firmly based in lumped-elementanalog circuit design, it is nice to see that microwave knowledge is brought inwhere necessary.Too many analog circuit books in the past have concentrated first on thecircuit side rather than on basic theory behind their application in communications.The circuits usually used have evolved through experience, without asatisfying intellectual theme in describing them. Why a given circuit works bestcan be subtle, and often these circuits are chosen only through experience. Forthis reason, I am happy that the book begins first with topics that require anintellectual approach—noise, linearity and filtering, and technology issues. Iam particularly happy with how linearity is introduced (power series). In therest of the book it is then shown, with specific circuits and numerical examples,how linearity and noise issues arise.
標(biāo)簽: Rogers Radio John Freq
上傳時(shí)間: 2014-12-23
上傳用戶:han_zh
特點(diǎn)(FEATURES) 精確度0.1%滿刻度 (Accuracy 0.1%F.S.) 可作各式數(shù)學(xué)演算式功能如:A+B/A-B/AxB/A/B/A&B(Hi or Lo)/|A| (Math functioA+B/A-B/AxB/A/B/A&B(Hi&Lo)/|A|/etc.....) 16 BIT 類比輸出功能(16 bit DAC isolating analog output function) 輸入/輸出1/輸出2絕緣耐壓2仟伏特/1分鐘(Dielectric strength 2KVac/1min. (input/output1/output2/power)) 寬范圍交直流兩用電源設(shè)計(jì)(Wide input range for auxiliary power) 尺寸小,穩(wěn)定性高(Dimension small and High stability)
標(biāo)簽: 微電腦 數(shù)學(xué)演算 輸出 隔離傳送器
上傳時(shí)間: 2013-11-24
上傳用戶:541657925
The CN3052A is a complete constant-current /constant voltage linear charger for single cell Li-ion and Li Polymer rechargeable batteries. The device contains an on-chip power MOSFET and eliminates the need for the external sense resistor and blocking diode.
上傳時(shí)間: 2013-11-10
上傳用戶:子虛烏有
a_bit equ 20h ;個(gè)位數(shù)存放處 b_bit equ 21h ;十位數(shù)存放處 temp equ 22h ;計(jì)數(shù)器寄存器 star: mov temp,#0 ;初始化計(jì)數(shù)器 stlop: acall display inc temp mov a,temp cjne a,#100,next ;=100重來(lái) mov temp,#0 next: ljmp stlop ;顯示子程序 display: mov a,temp ;將temp中的十六進(jìn)制數(shù)轉(zhuǎn)換成10進(jìn)制 mov b,#10 ;10進(jìn)制/10=10進(jìn)制 div ab mov b_bit,a ;十位在a mov a_bit,b ;個(gè)位在b mov dptr,#numtab ;指定查表啟始地址 mov r0,#4 dpl1: mov r1,#250 ;顯示1000次 dplop: mov a,a_bit ;取個(gè)位數(shù) MOVC A,@A+DPTR ;查個(gè)位數(shù)的7段代碼 mov p0,a ;送出個(gè)位的7段代碼
標(biāo)簽: 直接驅(qū)動(dòng) 數(shù)碼管 計(jì)數(shù)器 程序
上傳時(shí)間: 2013-11-06
上傳用戶:lx9076
設(shè)計(jì)一種基于ATmega16L單片機(jī)的溫度控制系統(tǒng),闡述該系統(tǒng)的軟硬件設(shè)計(jì)方案。采用模塊化設(shè)計(jì)方法,利用增量式PID算法使被控對(duì)象的溫度值趨于給定值。實(shí)驗(yàn)結(jié)果表明該系統(tǒng)具有良好的檢測(cè)和控制功能。 Abstract: This paper designs a temperature control system based on ATmega16L,describes the hardware and software de-sign scheme of the system,adopts the modularized design method and utilizes the incremental PID algorithm to realize the temperature of controlled device incline to the given value.The experiment result indicates that the system has good detec-tion and control function
標(biāo)簽: ATmega 16L 16 單片機(jī)
上傳時(shí)間: 2013-10-09
上傳用戶:stvnash
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