High-Speed, Low-Power Dual Operational Amplifier The AD826 features high output current drive capability of 50 mA min per amp, and is able to drive unlimited capacitive loads. With a low power supply current of 15 mA max for both amplifiers, the AD826 is a true general purpose operational amplifier. The AD826 is ideal for power sensitive applications such as video cameras and portable instrumentation. The AD826 can operate from a single +5 V supply, while still achieving 25 MHz of band width. Furthermore the AD826 is fully specified from a single +5 V to ±15 V power supplies. The AD826 excels as an ADC/DAC buffer or active filter in data Acquisition systems and achieves a settling time of 70 ns to 0.01%, with a low input offset voltage of 2 mV max. The AD826 is available in small 8-lead plastic mini-DIP and SO packages.
上傳時間： 2020-04-19
上傳用戶：su1254
To meet the future demand for huge traffic volume of wireless data service, the research on the fifth generation (5G) mobile communication systems has been undertaken in recent years. It is expected that the spectral and energy efficiencies in 5G mobile communication systems should be ten-fold higher than the ones in the fourth generation (4G) mobile communication systems. Therefore, it is important to further exploit the potential of spatial multiplexing of multiple antennas. In the last twenty years, multiple-input multiple-output (MIMO) antenna techniques have been considered as the key techniques to increase the capacity of wireless communication systems. When a large-scale antenna array (which is also called massive MIMO) is equipped in a base-station, or a large number of distributed antennas (which is also called large-scale distributed MIMO) are deployed, the spectral and energy efficiencies can be further improved by using spatial domain multiple access. This paper provides an overview of massive MIMO and large-scale distributed MIMO systems, including spectral efficiency analysis, channel state information (CSI) Acquisition, wireless transmission technology, and resource allocation.
標簽： Large-scale Antenna Systems
上傳時間： 2020-05-27
上傳用戶：shancjb
基于界面操作的人臉心率檢測的代碼，通過攝像頭實時采集人視頻，并計算心率(Face the heart rate detection interface operation based on the code, through real-time Acquisition one camera video, and rate)
上傳時間： 2021-02-24
上傳用戶：
基于LabVIEW2012FPGA模式的數(shù)據(jù)采集和存儲系統(tǒng)摘 要：為了提高數(shù)據(jù)采集系統(tǒng)精度，減少開發(fā)成本，提高開發(fā)效率，基于LabVIEW虛擬儀器開發(fā)工具研究并設(shè)計了一 種數(shù)據(jù)采集系統(tǒng)。該系統(tǒng)采用FPGA編程模式和網(wǎng)絡(luò)流技術(shù)實現(xiàn)大批量數(shù)據(jù)實時傳輸，并對數(shù)據(jù)進行分析處理和存儲。系 統(tǒng)硬件采用美國NI實時控制器CRIO?9025，實現(xiàn)16路數(shù)據(jù)可靠采集與存儲。實驗仿真及實際運行結(jié)果表明該數(shù)據(jù)采集系 統(tǒng)能夠精確地對數(shù)據(jù)進行實時采集以及分析處理，達到了項目要求。 關(guān)鍵詞：FPGA；FIFO；網(wǎng)絡(luò)流；數(shù)據(jù)采集系統(tǒng)；SQL數(shù)據(jù)庫 中圖分類號：TN98?34 文獻標識碼：A 文章編號：1004?373X（2014）14?0142?04 Data Acquisition and storage system based on LabVIEW 2012FPGA pattern WANG Shu?dong1,2 ，WEI Kong?zhen1 ，LI Xiao?pei1 （1. College of Electrical and Information Engineering，Lanzhou University of Technology，Lanzhou 730050，China； 2. Gansu Key Laboratory for Advanced Industrial Process Control，Lanzhou 730050，China）
標簽： labview fpga 數(shù)據(jù)采集
上傳時間： 2022-02-18
上傳用戶：
設(shè)計了農(nóng)業(yè)溫濕度智能控制系統(tǒng),該系統(tǒng)采用DHT11溫濕度傳感器作為溫濕度采集模塊,單片機選用AT89C52代替并調(diào)用Virtual terminal模擬串口通信,LCD1604液晶顯示器實時顯示溫濕度,實現(xiàn)了溫濕度的測量、顯示,可自動控制加熱、降溫、加濕、通風(fēng),實現(xiàn)溫濕度控制以及超限報警處理,并利用Proteus與Keil進行實際電路的仿真。試驗表明,該系統(tǒng)實現(xiàn)了可靠的溫濕度監(jiān)控。We described the design of an intelligent control system of agriculture temperature and humidity.The system uses DHT11 temperature and humidity sensor as the temperature and humidity Acquisition module.The SCM adopts AT89C52 to replace and call the virtual terminal for simulating serial communication.LCD1604 displays temperature and humidity in real time,which implements the measurement and display of temperature and humidity.The system is able to automatically control heating,cooling,humidification and ventilation,to achieve temperature and humidity control and over-limit alarm processing.The system also uses Proteus and Keil for actual circuit simulation.The experiment shows that the system is capable of reliable temperature and humidity monitoring.
上傳時間： 2022-03-26
上傳用戶：aben
隨著光伏發(fā)電系統(tǒng)快速發(fā)展,以及電動汽車充電樁的普及,傳統(tǒng)的剩余電流保護器無法滿足實際需求。介紹了一款B型剩余電流保護器,采用磁調(diào)制剩余電流互感器和零序電流互感器采集剩余電流。根據(jù)GB/T 22794—2017標準要求,可識別1 kHz及以下的正弦交流、帶和不帶直流分量的脈動直流、平滑直流等剩余電流信號。經(jīng)信號調(diào)理電路將電壓信號送到單片機進行采集和判斷。通過試驗測試,該樣機在測試精度和速度上均符合國家標準的相關(guān)要求。The rapid development of photovoltaic power generation systems and the popularity of electric vehicle charging piles make the traditional residual current protective devices unable to meet the actual demand.This paper proposed a type B residual current protective device,which uses the magnetically modulated residual current transformer and the zero sequence current transformer to acquire the residual current.According to the requirements of GB/T 22794—2017,the type B residual current protective device can detect sinusoidal AC residual current of 1kHz and below 1kHz,pulsating DC residual current with and without DC component,smooth DC residual current and so on.The signal processing circuit sends the voltage signal to the MCU for Acquisition and judgment.Through experimental tests,the device meets the relevant requirements of national standards in terms of test accuracy and speed.
標簽： 電流保護器
上傳時間： 2022-03-27
上傳用戶：
以AT89S52單片機為控制核心,采用電容降壓技術(shù),Buck電路拓撲,PWM驅(qū)動模塊和功率器件散熱設(shè)計,通過高速的數(shù)據(jù)采集、主功率輸入輸出模塊和控制模塊,設(shè)計一種新型智能車載充電器.在充電過程中,通過負脈沖瞬間放電實現(xiàn)對鉛酸蓄電池的再生修復(fù),提高電池的有效容量,延長使用壽命.該充電器體積小、速度快、效率高、可靠性好.With AT89S52 single chip computer as the control core,a new type of intelligent car-carried charger was designed by using capacitance step-down technology,Buck circuit topology,PWM driving module and power device heat dissipation design,through high-speed data Acquisition,main power input and output module and control module.In the charging process,the regeneration and repair of lead-acid batteries are realized by instantaneous discharge of negative pulse,which improves the effective capacity of batteries and prolongs their service life.The charger has the advantages of small size,fast speed,high efficiency and good reliability.
標簽： 車載充電器
上傳時間： 2022-03-27
上傳用戶：
配電網(wǎng)中,各種配電終端的電流、電壓、有功功率及無功功率等模擬量的采集是配電網(wǎng)自動化的重要環(huán)節(jié)。這些模擬量的采集也是各種儀器和家用電器的必要功能。因此,設(shè)計了基于嵌入式STM32F103單片機的交流電壓、交流電流及有功功率的采集系統(tǒng),通過電壓互感器TV1005M和電流互感器TA1005M分別檢測交流電壓和交流電流值;屏幕或者手機APP和WiFi模塊互聯(lián)后,可以實時顯示交流電壓、交流電流、功率及電量值;通過設(shè)定閾值功率,可以實現(xiàn)對電流的監(jiān)控和對電路的保護。In the distribution network,the collection of analog,such as current,voltage,active power,and reactive power at various distribution terminals is a very important part of distribution network automation. These analog Acquisitions are also for various instruments and household appliances. Very important technology. Therefore,an AC voltage,AC current and active power Acquisition system based on embedded STM32 F103 machine is designed,and AC voltage and AC current values are detected by voltage transformer TV1005 M and current Transformer TA1005 M respectively;After the screen or mobile phone APP and WiFi modules are interconnected,AC voltage,AC current,power,and power values can be displayed in real time;By setting the threshold power,the current can be monitored and the circuit can be protected.
上傳時間： 2022-03-27
上傳用戶：shjgzh
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，人機交互以及電源等模塊構(gòu)成。采用時差法進行管道流量測量，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、準確性好、成本低等優(yōu)點。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
標簽： tms320f28335 超聲波流量計
上傳時間： 2022-05-06
上傳用戶：
Matlab_2016a 完整破解版下載 使用增強的設(shè)計環(huán)境和 UI 組件集開發(fā) MATLAB 應(yīng)用。深度學(xué)習(xí)用于圖像分類問題。訪問模板、最新模型以及精選示例。創(chuàng)建包含事件操作和新模塊的離散事件模型和調(diào)度程序。使用標準座艙儀器顯示飛行條件。在線編輯器，用于：開發(fā)包含結(jié)果和圖形以及相關(guān)代碼的實時腳本創(chuàng)建用于分享的交互式描述，包括代碼、結(jié)果和圖形以及格式化文本、超鏈接、圖像及方程式MATLAB應(yīng)用設(shè)計器，使用增強的設(shè)計環(huán)境和擴展的 UI 組件集構(gòu)建帶有線條圖和散點圖的 MATLAB?應(yīng)用全新多 y-軸圖、極坐標圖和等式可視化暫停、調(diào)試和繼續(xù) MATLAB 代碼執(zhí)行Neural Network Toolbox使用 Parallel Computing Toolbox? 中的 GPU 加速深入學(xué)習(xí)圖像分類任務(wù)的卷積神經(jīng)網(wǎng)絡(luò) (CNN)Symbolic Math Toolbox與 MATLAB 在線編輯器集成，以便編輯符號代碼和可視化結(jié)果，并將 MuPAD? 筆記本轉(zhuǎn)換為實時腳本Statistics and Machine Learning ToolboxClassification Learner 應(yīng)用，可以自動培訓(xùn)多個模型，按照級別標簽對結(jié)果進行可視化處理，并執(zhí)行邏輯回歸分類Control System Toolbox新建及重新設(shè)計的應(yīng)用，用于設(shè)計 SISO 控制器、自動整定 MIMO 系統(tǒng)和創(chuàng)建降階模型Image Acquisition Toolbox支持 Kinect? for Windows? v2 和 USB 3 VisionComputer Vision System Toolbox光學(xué)字符識別 (OCR) 訓(xùn)練程序應(yīng)用、行人偵測和來自針對 3-D 視覺的動作和光束平差的結(jié)構(gòu)體Trading Toolbox對交易、靈敏性和交易后執(zhí)行的交易成本分析Simulink 產(chǎn)品系列Simulink通過訪問模板、最近模型和精選示例更快開始或繼續(xù)工作的起始頁自動求解器選項可更快速地設(shè)置和仿真模型針對異構(gòu)設(shè)備的系統(tǒng)模型仿真，例如 Xilinx?和 Altera? SoC 架構(gòu)Simulink? 單位，可在 Simulink、Stateflow? 和 Simscape? 組件的接口指定單位、對其進行可視化處理并檢查變量源和接收器模塊，用于定義變量條件并使用生成代碼中的編譯器指令將其傳播至連接的功能Aerospace Blockset標準座艙儀器，用于顯示飛行條件SimEvents全新離散事件仿真和建模引擎，包括事件響應(yīng)、MATLAB 離散事件系統(tǒng)對象制作以及 Simulink 和 Stateflow 自動域轉(zhuǎn)換Simscape全新方程簡化和仿真技術(shù)，用于生成代碼的快速仿真和運行時參數(shù)調(diào)整Simscape FluidsThermal Liquid 庫，用于對屬性隨溫度而變化的液體的系統(tǒng)建模Simulink Design Optimization用于實驗設(shè)計、Monte Carlo 仿真和相關(guān)性分析的靈敏度分析工具Simulink Report Generator三向模型合并，以圖形方式解決 Simulink 項目各修訂版之間的沖突信號處理和通信Antenna Toolbox電介質(zhì)建模，用于分析天線和有限天線陣列中的基質(zhì)效果RF ToolboxRF Budget Analyzer，用于為級聯(lián)的射頻組件計算增益、噪聲系數(shù)和 IP3SimRF自動射頻測試工作臺生成Audio System Toolbox一款用于設(shè)計和測試音頻處理系統(tǒng)的新產(chǎn)品WLAN System Toolbox一款用于對 WLAN 通信系統(tǒng)的物理層進行仿真、分析和測試的新產(chǎn)品代碼生成Embedded Coder編譯器指令生成，將信號維度作為 #define 進行實施HDL Coder針對 HDL 優(yōu)化的 FFT 和 IFFT，支持每秒 G 字節(jié)采樣 (GSPS) 設(shè)計的幀輸入HDL VerifierPCIe FPGA 在環(huán)，用于通過 PCI Express? 接口仿真 Xilinx? KC705/VC707 和 Altera?Cyclone? V GT/Stratix V DSP 開發(fā)板上的算法驗證和確認Polyspace Code Prover支持 long-double 浮點，并且改進了對無窮大和 NaN 的支持Simulink Design Verifier對 C 代碼 S-function 自動生成測試IEC Certification Kit對 Simulink Verification and Validation? 提供 IEC 62304 醫(yī)學(xué)標準支持Simulink Test使用 Simulink Real-Time? 制作和執(zhí)行實時測試
上傳時間： 2013-07-09
上傳用戶：eeworm
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