基于TMS320F28335的超聲波流量計硬件原理圖+軟件源碼本文以TMS320F28335 處理器為核心,設(shè)計一種用于管道流量測量的超聲波流量計。系統(tǒng)硬件由核心板,超聲波發(fā)射和接收電路,切換電路,超聲換能器,基于ADS805 的高速信號采集電路,人機(jī)交互以及電源等模塊構(gòu)成。采用時差法進(jìn)行管道流量測量,時差測量采用SCOT 加權(quán)的廣義互相關(guān)時延估計算法。本論文設(shè)計的超聲波流量計具有測量速度快、準(zhǔn)確性好、成本低等優(yōu)點(diǎn)。關(guān)鍵字:C2000,超聲波,流量,廣義互相關(guān)算法AbstractA kind of ultrasonic flowmeter using for the pipe flow measurement is designed based onTMS320F28335 in this paper. The system hardware consists of the following parts: the core board,ultrasonic signal transmitter and receiver circuits, switch circuit, ultrasonic transducer, signalacquisition circuit based on ADS805, human-computer interaction module and power supplymodule, etc. The system use the method of time difference for pipeline flow measurement and thetime difference is calculated by the time-delay algorithm of SCOT weighted generalizedcross-correlation. The ultrasonic flowmeter has the features of high testing speed, high precisionand low cost, etc.Keywords: C2000,Ultrasonic, Flow, Generalized Cross-Correlation Algorithm
標(biāo)簽: tms320f28335 超聲波流量計
上傳時間: 2022-05-06
上傳用戶:
以STM32F103C8T6為核心,設(shè)計了無刷直流電機(jī)控制器硬件電路。電路主要包括IR2310構(gòu)成的PWM驅(qū)動電路、IRF3808構(gòu)成的逆變電路、增量式旋轉(zhuǎn)編碼構(gòu)成的速度反饋電路。控制器具有CAN和RS232通信接口,可與計算機(jī)或PLC構(gòu)成速度或位置伺服系統(tǒng)。利用由xPC目標(biāo)搭建的半實(shí)物仿真平臺對PI參數(shù)進(jìn)行整定。測試了控制器的速度伺服響應(yīng)性能,給定速度為2400rpm時,控制器響應(yīng)時間為0.32s。實(shí)驗(yàn)結(jié)果表明,系統(tǒng)工作可靠,穩(wěn)定性好,響應(yīng)速度快,可以滿足上肢康復(fù)機(jī)器人的機(jī)械臂速度控制性能要求。The hardware circuit of Brushless DC motor controller is designed by taking STM32F103C8T6 as the core,which mainly includes PWM driving circuits made up of IR2310,inverter circuit formed by IRF3808,speed feedback circuit composed of incremental rotary encoder and so on.Speed servo control system or position servo control system can be composed of BLDM controller with computer or PLC through CAN communication interface or RS232 serial communication interface.By using the hardware in the loop simulation platform built by xPC target,the PI parameters are set up.The Speed servo response performance of the controller is tested.When the speed is 2 400 rpm,the response time of the controller is 0...
標(biāo)簽: stm32 無刷直流電機(jī)
上傳時間: 2022-05-07
上傳用戶:
說明: 基于51單片機(jī)的數(shù)字直流電壓表相關(guān)材料,內(nèi)容有原理圖,仿真文件,論文材料,程序源碼等。(The related materials of digital DC voltmeter based on 51 single chip computer include schematic simulation files, paper materials, program source code, etc.)
標(biāo)簽: 51單片機(jī) tlc2543 電壓表
上傳時間: 2022-05-16
上傳用戶:fliang
說明: 51單片機(jī)控制智能溫控風(fēng)扇,多檔調(diào)節(jié),pwd調(diào)速。包含源碼和電路圖(51 single chip computer control intelligent temperature control fan, multi-stage adjustment, PWD speed regulation. Contains source code and circuit diagrams)
上傳時間: 2022-05-17
上傳用戶:
Compact PCI(Compact Peripheral Component Interconnect)簡稱CPCI,中文又稱緊湊型PCI,是國際工業(yè)計算機(jī)制造者聯(lián)合會(PCI Industrial Computer Manufacturer's Group,簡稱PICMG)于1994提出來的一種總線接口標(biāo)準(zhǔn)。是以PCI電氣規(guī)范為標(biāo)準(zhǔn)的高性能工業(yè)用總線。為了將PCI SIG的PCI總線規(guī)范用在工業(yè)控制計算機(jī)系統(tǒng),1995年11月PCI工業(yè)計算機(jī)制造者聯(lián)合會(PICMG)頒布了CPCI規(guī)范1.0版,以后相繼推出了PCI-PCI Bridge規(guī)范、Computer Telephony TDM規(guī)范和User-defined I/O pin assignment規(guī)范。
標(biāo)簽: cpci
上傳時間: 2022-05-20
上傳用戶:
Abstract: A sliding mode observer and fractional-order phase-locked loop (FO-PLL) method is proposed for the sensorless speed control of a permanent magnet synchronous motor (PMSM).The saturation function is adopted in order to reduce the chattering phenomenon caused by the sliding mode observer. In this proposed FO-PLL, method, a regulable fractional order r is involved, which means that the FO-PLL provides an extra degree of freedom. In fact, the conventional phase-locked loop (PLL) applied in sensorless PMSM control can be seen as a special case of the proposed FO-PLL. By selecting a proper fractional order r a better performance may be achieved. The computer simulation results demonstrate the effectiveness of the proposed method.Key words: fractional calculus; fractional order phase-locked loop; sensorless control; sliding mode observer; permanent magnet synchronous motor; speed controll
上傳時間: 2022-06-18
上傳用戶:
文章首先闡述了整個方案的工作原理,給出LDO設(shè)計的指標(biāo)要求;其次,依據(jù)系統(tǒng)方案的指標(biāo)要求和制造1藝約束,實(shí)現(xiàn)包含誤差放大器、基準(zhǔn)源和保護(hù)電路等了模塊在內(nèi)的電壓調(diào)整器:此外,文章還著重探討了“如何利用放大器驅(qū)動100pF數(shù)量級的大電容負(fù)載"的問題;最后,給出整個模塊總體電路的仿真驗(yàn)證結(jié)果。LDO的架構(gòu)分析和設(shè)計以及基準(zhǔn)源的設(shè)計是本文的核心內(nèi)容。在LDO架構(gòu)設(shè)計部分,文章基于對三種不同LDO拓?fù)涞姆治觯x擇并實(shí)現(xiàn)了含緩沖器級的LDO./設(shè)計中通過改進(jìn)反饋網(wǎng)絡(luò),采用反饋電容,實(shí)現(xiàn)對LDO的環(huán)路補(bǔ)償。同時,為提高誤差放大器驅(qū)動功率管的能力、適應(yīng)LDO低功耗發(fā)展的需求,文章探討了如何使用放大器驅(qū)動大負(fù)載電容的問題,基于密勒定理和根軌跡原理,本文通過研究密勒電容的作用,采用MPC(Miller-Path-Compersation)結(jié)構(gòu),實(shí)踐了兩級放大器驅(qū)動大負(fù)載電容的方案,并把MPC補(bǔ)償技術(shù)推廣到三級放大器的設(shè)計中。文章設(shè)計的CRF(CRF:Current Re ference controlled by Feedback)電流基準(zhǔn)是基于對傳統(tǒng)自啟動基準(zhǔn)電流源的改進(jìn)實(shí)現(xiàn)的。CRF基準(zhǔn)電流源架構(gòu)中存在一條阻性的電流道路,確保其在加載電源電壓的過程中能夠?qū)崿F(xiàn)快速啟動,響應(yīng)速度達(dá)到1ps:而傳統(tǒng)自啟動基準(zhǔn)電流源在相同的設(shè)計參數(shù)下,響應(yīng)速度長達(dá)120us.CRF基準(zhǔn)電流源突破了響應(yīng)速度對其應(yīng)用的限制。
上傳時間: 2022-06-23
上傳用戶:
Internet-“冷戰(zhàn)”的產(chǎn)物-1957年10月和11月,前蘇聯(lián)先后有兩顆“Sputnik”衛(wèi)星上天-1958年美國總統(tǒng)艾森豪威爾向美國國會提出建立DARPA(Defense Advanced Research Project Agency),即國防部高級研究計劃署,簡稱ARPA-1968年6月DARPA提出“資源共享計算機(jī)網(wǎng)絡(luò)”(Resource Sharing Computer Networks),目的在于讓DARPA的所有電腦互連起來,這個網(wǎng)絡(luò)就叫做ARPAnet,即“阿帕網(wǎng)”,是Interne的最早雛形早期的ARPAnet使用網(wǎng)絡(luò)控制協(xié)議(Network Control Protocol,NCP),不能互聯(lián)不同類型的計算機(jī)和不同類型的操作系統(tǒng),沒有糾錯功能1973年由Kahn和Vinton Cerf兩人合作為ARPAnet開發(fā)了新的互聯(lián)協(xié)議。1974年12月兩人正式發(fā)表第一份TCP協(xié)議詳細(xì)說明,但此協(xié)議有信包丟失時不能得到有效的糾正TCP協(xié)議分成了兩個不同的協(xié)議:-用來檢測網(wǎng)絡(luò)傳輸中差錯的傳輸控制協(xié)議TCP-專門負(fù)責(zé)對不同網(wǎng)絡(luò)進(jìn)行互聯(lián)的互聯(lián)網(wǎng)協(xié)議IP從此TCP/IP協(xié)議誕生1983年ARPAnet上停止使用NCP,互聯(lián)網(wǎng)上的主機(jī)全部使用TCP/IP協(xié)議,TCP/IP協(xié)議成為Internet中的“世界語”
標(biāo)簽: TCP-IP
上傳時間: 2022-06-23
上傳用戶:
摘要:本系統(tǒng)以ICL8038集成塊為核心器件,制作一種函數(shù)信號發(fā)生器,制作成本較低。適合學(xué)生學(xué)習(xí)電子技術(shù)測量使用。ICL8038是一種具有多種波形輸出的精密振蕩集成電路,只需要個別的外部元件就能產(chǎn)生從0.001Hz~30KlHz的低失真正弦波、三角波、矩形波等脈沖信號。輸出波形的頻率和占空比還可以由電流或電阻控制。另外由于該芯片具有調(diào)制信號輸入端,所以可以用來對低頻信號進(jìn)行頻率調(diào)制。關(guān)鍵詞:函數(shù)信號發(fā)生器頻率調(diào)制Abstract:The system ICL8038 integrated block as the core device,producing a kind of function signal generator,producing low cost.Suitable for students to learn the use of electronic technology measurement.ICL8038 is a kind of multi-precision oscillator waveform output integrated circuits,a separate external components only need to be able to generate from the 0.001Hz ~30KHz low-distortion sine wave,triangle wave,square wave pulse signal,etc..Output waveform of the frequency and duty cycle can also be controlled by a currentor resistance.In addition,as the chip has a modulated signal input terminal,it can be used to low-frequency signal is frequency modulation.
標(biāo)簽: icl8038 函數(shù)發(fā)生器 電路
上傳時間: 2022-07-04
上傳用戶:zhanglei193
Agenda■Motor Types Overview■BLDC Motor Applications■Comparison of DC to Brushless DC Motors■Hall Sensors■Six-Step Commutation■Sensorless Commutation with Back-EMFVector Motor Control basicsClosed-Loop Speed Control■Introduction to BLDC Motor Control Evaluation Kit■SummaryAll the popular motor types have their specific applications, and all can be controlled with microcontrollers.We wll talk about Brushless DC motors as it is the fast growing motor type today.Motors used in modern Air conditioners, home appliances, tools, even electric bikes are all going to Brushless DC.
標(biāo)簽: bldc 電機(jī)驅(qū)動
上傳時間: 2022-07-07
上傳用戶:
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