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,設計一種用于管道流量測量的超聲波流量計。系統硬件由核心板,超聲波發射和接收電路,切換電路,超聲換能器,基于ADS805 的高速信號采集電路,人機交互以及電源等模塊構成。采用時差法進行管道流量測量,時差測量采用SCOT 加權的廣義互相關時延估計算法。本論文設計的超聲波流量計具有測量速度快、準確性好、成本低等優點。關鍵字:C2000,超聲波,流量,廣義互相關算法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,設計了無刷直流電機控制器硬件電路。電路主要包括IR2310構成的PWM驅動電路、IRF3808構成的逆變電路、增量式旋轉編碼構成的速度反饋電路。控制器具有CAN和RS232通信接口,可與計算機或PLC構成速度或位置伺服系統。利用由xPC目標搭建的半實物仿真平臺對PI參數進行整定。測試了控制器的速度伺服響應性能,給定速度為2400rpm時,控制器響應時間為0.32s。實驗結果表明,系統工作可靠,穩定性好,響應速度快,可以滿足上肢康復機器人的機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...
上傳時間: 2022-05-07
上傳用戶:
說明: 基于51單片機的數字直流電壓表相關材料,內容有原理圖,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.)
上傳時間: 2022-05-16
上傳用戶:fliang
說明: 51單片機控制智能溫控風扇,多檔調節,pwd調速。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,是國際工業計算機制造者聯合會(PCI Industrial Computer Manufacturer's Group,簡稱PICMG)于1994提出來的一種總線接口標準。是以PCI電氣規范為標準的高性能工業用總線。為了將PCI SIG的PCI總線規范用在工業控制計算機系統,1995年11月PCI工業計算機制造者聯合會(PICMG)頒布了CPCI規范1.0版,以后相繼推出了PCI-PCI Bridge規范、Computer Telephony TDM規范和User-defined I/O pin assignment規范。
標簽: 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設計的指標要求;其次,依據系統方案的指標要求和制造1藝約束,實現包含誤差放大器、基準源和保護電路等了模塊在內的電壓調整器:此外,文章還著重探討了“如何利用放大器驅動100pF數量級的大電容負載"的問題;最后,給出整個模塊總體電路的仿真驗證結果。LDO的架構分析和設計以及基準源的設計是本文的核心內容。在LDO架構設計部分,文章基于對三種不同LDO拓撲的分析,選擇并實現了含緩沖器級的LDO./設計中通過改進反饋網絡,采用反饋電容,實現對LDO的環路補償。同時,為提高誤差放大器驅動功率管的能力、適應LDO低功耗發展的需求,文章探討了如何使用放大器驅動大負載電容的問題,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)結構,實踐了兩級放大器驅動大負載電容的方案,并把MPC補償技術推廣到三級放大器的設計中。文章設計的CRF(CRF:Current Re ference controlled by Feedback)電流基準是基于對傳統自啟動基準電流源的改進實現的。CRF基準電流源架構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實現快速啟動,響應速度達到1ps:而傳統自啟動基準電流源在相同的設計參數下,響應速度長達120us.CRF基準電流源突破了響應速度對其應用的限制。
上傳時間: 2022-06-23
上傳用戶:
Internet-“冷戰”的產物-1957年10月和11月,前蘇聯先后有兩顆“Sputnik”衛星上天-1958年美國總統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“資源共享計算機網絡”(Resource Sharing Computer Networks),目的在于讓DARPA的所有電腦互連起來,這個網絡就叫做ARPAnet,即“阿帕網”,是Interne的最早雛形早期的ARPAnet使用網絡控制協議(Network Control Protocol,NCP),不能互聯不同類型的計算機和不同類型的操作系統,沒有糾錯功能1973年由Kahn和Vinton Cerf兩人合作為ARPAnet開發了新的互聯協議。1974年12月兩人正式發表第一份TCP協議詳細說明,但此協議有信包丟失時不能得到有效的糾正TCP協議分成了兩個不同的協議:-用來檢測網絡傳輸中差錯的傳輸控制協議TCP-專門負責對不同網絡進行互聯的互聯網協議IP從此TCP/IP協議誕生1983年ARPAnet上停止使用NCP,互聯網上的主機全部使用TCP/IP協議,TCP/IP協議成為Internet中的“世界語”
標簽: TCP-IP
上傳時間: 2022-06-23
上傳用戶:
摘要:本系統以ICL8038集成塊為核心器件,制作一種函數信號發生器,制作成本較低。適合學生學習電子技術測量使用。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制信號輸入端,所以可以用來對低頻信號進行頻率調制。關鍵詞:函數信號發生器頻率調制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.
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.
上傳時間: 2022-07-07
上傳用戶: