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.
上传时间： 2020-04-19
上传用户：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.
标签： Large-scale Antenna Systems
上传时间： 2020-05-27
上传用户：shancjb
基于界面操作的人脸心率检测的代码，通过摄像头实时采集人视频，并计算心率(Face the heart rate detection interface operation based on the code, through real-time Acquisition one camera video, and rate)
上传时间： 2021-02-24
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基于LabVIEW2012FPGA模式的数据采集和存储系统摘 要：为了提高数据采集系统精度，减少开发成本，提高开发效率，基于LabVIEW虚拟仪器开发工具研究并设计了一 种数据采集系统。该系统采用FPGA编程模式和网络流技术实现大批量数据实时传输，并对数据进行分析处理和存储。系 统硬件采用美国NI实时控制器CRIO⁃9025，实现16路数据可靠采集与存储。实验仿真及实际运行结果表明该数据采集系 统能够精确地对数据进行实时采集以及分析处理，达到了项目要求。 关键词：FPGA；FIFO；网络流；数据采集系统；SQL数据库 中图分类号：TN98⁃34 文献标识码：A 文章编号：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）
上传时间： 2022-02-18
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设计了农业温湿度智能控制系统,该系统采用DHT11温湿度传感器作为温湿度采集模块,单片机选用AT89C52代替并调用Virtual terminal模拟串口通信,LCD1604液晶显示器实时显示温湿度,实现了温湿度的测量、显示,可自动控制加热、降温、加湿、通风,实现温湿度控制以及超限报警处理,并利用Proteus与Keil进行实际电路的仿真。试验表明,该系统实现了可靠的温湿度监控。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.
上传时间： 2022-03-26
上传用户：aben
随着光伏发电系统快速发展,以及电动汽车充电桩的普及,传统的剩余电流保护器无法满足实际需求。介绍了一款B型剩余电流保护器,采用磁调制剩余电流互感器和零序电流互感器采集剩余电流。根据GB/T 22794—2017标准要求,可识别1 kHz及以下的正弦交流、带和不带直流分量的脉动直流、平滑直流等剩余电流信号。经信号调理电路将电压信号送到单片机进行采集和判断。通过试验测试,该样机在测试精度和速度上均符合国家标准的相关要求。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.
标签： 电流保护器
上传时间： 2022-03-27
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以AT89S52单片机为控制核心,采用电容降压技术,Buck电路拓扑,PWM驱动模块和功率器件散热设计,通过高速的数据采集、主功率输入输出模块和控制模块,设计一种新型智能车载充电器.在充电过程中,通过负脉冲瞬间放电实现对铅酸蓄电池的再生修复,提高电池的有效容量,延长使用寿命.该充电器体积小、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.
标签： 车载充电器
上传时间： 2022-03-27
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配电网中,各种配电终端的电流、电压、有功功率及无功功率等模拟量的采集是配电网自动化的重要环节。这些模拟量的采集也是各种仪器和家用电器的必要功能。因此,设计了基于嵌入式STM32F103单片机的交流电压、交流电流及有功功率的采集系统,通过电压互感器TV1005M和电流互感器TA1005M分别检测交流电压和交流电流值;屏幕或者手机APP和WiFi模块互联后,可以实时显示交流电压、交流电流、功率及电量值;通过设定阈值功率,可以实现对电流的监控和对电路的保护。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.
上传时间： 2022-03-27
上传用户：shjgzh
基于TMS320F28335的超声波流量计硬件原理图+软件源码本文以TMS320F28335 处理器为核心，设计一种用于管道流量测量的超声波流量计。系统硬件由核心板，超声波发射和接收电路，切换电路，超声换能器，基于ADS805 的高速信号采集电路，人机交互以及电源等模块构成。采用时差法进行管道流量测量，时差测量采用SCOT 加权的广义互相关时延估计算法。本论文设计的超声波流量计具有测量速度快、准确性好、成本低等优点。关键字：C2000，超声波，流量，广义互相关算法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
标签： tms320f28335 超声波流量计
上传时间： 2022-05-06
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Matlab_2016a 完整破解版下载 使用增强的设计环境和 UI 组件集开发 MATLAB 应用。深度学习用于图像分类问题。访问模板、最新模型以及精选示例。创建包含事件操作和新模块的离散事件模型和调度程序。使用标准座舱仪器显示飞行条件。在线编辑器，用于：开发包含结果和图形以及相关代码的实时脚本创建用于分享的交互式描述，包括代码、结果和图形以及格式化文本、超链接、图像及方程式MATLAB应用设计器，使用增强的设计环境和扩展的 UI 组件集构建带有线条图和散点图的 MATLAB®应用全新多 y-轴图、极坐标图和等式可视化暂停、调试和继续 MATLAB 代码执行Neural Network Toolbox使用 Parallel Computing Toolbox™ 中的 GPU 加速深入学习图像分类任务的卷积神经网络 (CNN)Symbolic Math Toolbox与 MATLAB 在线编辑器集成，以便编辑符号代码和可视化结果，并将 MuPAD® 笔记本转换为实时脚本Statistics and Machine Learning ToolboxClassification Learner 应用，可以自动培训多个模型，按照级别标签对结果进行可视化处理，并执行逻辑回归分类Control System Toolbox新建及重新设计的应用，用于设计 SISO 控制器、自动整定 MIMO 系统和创建降阶模型Image Acquisition Toolbox支持 Kinect® for Windows® v2 和 USB 3 VisionComputer Vision System Toolbox光学字符识别 (OCR) 训练程序应用、行人侦测和来自针对 3-D 视觉的动作和光束平差的结构体Trading Toolbox对交易、灵敏性和交易后执行的交易成本分析Simulink 产品系列Simulink通过访问模板、最近模型和精选示例更快开始或继续工作的起始页自动求解器选项可更快速地设置和仿真模型针对异构设备的系统模型仿真，例如 Xilinx®和 Altera® SoC 架构Simulink® 单位，可在 Simulink、Stateflow® 和 Simscape™ 组件的接口指定单位、对其进行可视化处理并检查变量源和接收器模块，用于定义变量条件并使用生成代码中的编译器指令将其传播至连接的功能Aerospace Blockset标准座舱仪器，用于显示飞行条件SimEvents全新离散事件仿真和建模引擎，包括事件响应、MATLAB 离散事件系统对象制作以及 Simulink 和 Stateflow 自动域转换Simscape全新方程简化和仿真技术，用于生成代码的快速仿真和运行时参数调整Simscape FluidsThermal Liquid 库，用于对属性随温度而变化的液体的系统建模Simulink Design Optimization用于实验设计、Monte Carlo 仿真和相关性分析的灵敏度分析工具Simulink Report Generator三向模型合并，以图形方式解决 Simulink 项目各修订版之间的冲突信号处理和通信Antenna Toolbox电介质建模，用于分析天线和有限天线阵列中的基质效果RF ToolboxRF Budget Analyzer，用于为级联的射频组件计算增益、噪声系数和 IP3SimRF自动射频测试工作台生成Audio System Toolbox一款用于设计和测试音频处理系统的新产品WLAN System Toolbox一款用于对 WLAN 通信系统的物理层进行仿真、分析和测试的新产品代码生成Embedded Coder编译器指令生成，将信号维度作为 #define 进行实施HDL Coder针对 HDL 优化的 FFT 和 IFFT，支持每秒 G 字节采样 (GSPS) 设计的帧输入HDL VerifierPCIe FPGA 在环，用于通过 PCI Express® 接口仿真 Xilinx® KC705/VC707 和 Altera®Cyclone® V GT/Stratix V DSP 开发板上的算法验证和确认Polyspace Code Prover支持 long-double 浮点，并且改进了对无穷大和 NaN 的支持Simulink Design Verifier对 C 代码 S-function 自动生成测试IEC Certification Kit对 Simulink Verification and Validation™ 提供 IEC 62304 医学标准支持Simulink Test使用 Simulink Real-Time™ 制作和执行实时测试
上传时间： 2013-07-09
上传用户：eeworm
