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凌华科技发布便携式USB接口数据采集模块
佚名
【期刊名称】《自动化应用》
【年(卷),期】2011(000)011
【摘要】凌华科技发布旗下USB 2.0接口多功能数据采集模块：USB-1900系列与USB-2401产品。
凌华科技USB数据采集模块USB-1900系列与USB-2401,支持由USB插槽供电,可拆式接头易于配线,并提供免费开发软件U—Test．用户无需编写程序，可广泛适用于各种便携式量测应用．如工厂自动化与研究院所及大学教学实验等。
【总页数】1页(P38-38)
【正文语种】中文
【中图分类】TP274.2
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C-1CSupports USB 2.0Bus-Powered16 Analogue Inputs 12-Bit Resolution Sampling Rate up to 150kS/s8 DI/8 DO, 2 AO and One 32-bit Event Counter Suitable for DIN-Rail MountingLockable USB Cable for Rigid ConnectionUSB-4711A,£365, shown smaller than actual size.The USB-4700 series consists of true Plug & Play data acquisition modules. No more opening up your computer chassis to install boards.Just plug in the module, then get the data. It’s easy and efficient.Reliable and rugged enough for industrial applications, yetinexpensive enough for all types of projects, the USB-4711 is the perfect way to add measurement and control capability to any USB capable computer. The USB-4711 is fully USB Plug & Play and easy to use. It obtains all required power from the USB port, so no external power connection is ever required.Data collection is simple. Simply plug the data acquisition module into an available USB port and our easy-to-use Windows software does the rest. The softwareconverts your PC into a real-time strip chart recorder. Data can be printed in graphical or tabular format. It can also be exported to a text or Microsoft Excel file.SpecificationsANALOGUE INPUTChannels:16 single-ended/8differential (SW selectable) Resolution:12-bits Max Sampling Rate:*150k S/s maxFIFO Size:1024 samplesOvervoltage Protection:30 Vp-pInput Impedance:USB-4711A: 1 G ΩSampling Modes:Software, onboard programmable pacer, or externalANALOGUE OUTPUT Channels:2Resolution: 12-bitsRange:0 to 5V, 0 to 10V, ±10V (software programmable)Output Rate:Static update Slew Rate:0.15 V/ÌsDriving Capability:2 mA @ 10V Output Impedance:0.5Operation Mode: Single output Accuracy:Relative:±1 LSBDifferential On-Linearity:±1 LSB DIGITAL INPUTS Channels:8Compatibility:3.3V/5 V/TTL Input Voltage:Logic 0:0.8V max Logic 1:2.0V min DIGITAL OUTPUTS Channels:8Compatibility:3.3V/TTL Output Voltage:Logic 0:0.8V max@ 4 mA (sink) Logic 1:2.0V min@ 4 mA (source)EVENT COUNTER Channels:1Compatibility:3.3V/TTLMax Input Frequency:1 kHz GENERALBus Type:USB 2.0Software:Windows 2000/XP I/O Connector:On board screw terminal Dimensions:80 H x 132 L x 32 mm D (3.1 x 5.2 x 1.3")Power Consumption:5V @ 340 mA typical (5V @ 440 mA max)Operating Temperature: 0 to 60°C (32 to 140°F)Storing Temperature:-20 to 70°C (-4 to 158°F)Storing Humidity:5 to 95% RH non-condensingand software environment. The rates may vary due to programming language, code efficiency,CPU utilization and so on.USB 2.0 cable, and DIN rail mounting kit.Ordering Example:USB-4711A,150 kS/s, 12-bit multifunction USB data aquisition module,and OMEGACARE SM 1-year extended warranty for USB-4711A (adds 1 year to standard 1-year warranty), £365 + 36= £401.USB-4711A£365Windows software displays data in graphical ortabular format.CANADA www.omega.ca Laval(Quebec)1-800-TC-OMEGA UNITED KINGDOM Manchester,England0800-488-488GERMANY www.omega.deDeckenpfronn,Germany************FRANCE www.omega.fr 088-466-342BENELUX www.omega.nl 0800-099-33-44UNITED STATES 1-800-TC-OMEGA Stamford,CT.CZECH REPUBLIC www.omegaeng.cz Karviná,Czech Republic596-311-899TemperatureCalibrators, Connectors, General Test and Measurement Instruments, Handheld Instruments for Temperature Measurement, Ice Point References, Indicating Labels,Crayons, Cements and Lacquers, Infrared Temperature Measurement Instruments, Recorders, Relative Humidity Measurement Instruments, PT100 Probes, PT100 Elements,Temperature & Process Meters, Timers and Counters,Temperature and Process Controllers and Power Switching Devices, Thermistor Elements, Probes and Assemblies,Thermocouples, Thermowells and Head and WellAssemblies, Transmitters, Thermocouple Wire, RTD ProbesPressure,Strain and ForceDisplacement Transducers, Dynamic Measurement Force Sensors, Instrumentation for Pressure and StrainMeasurements, Load Cells, Pressure Gauges, PressureReference Section, Pressure Switches, Pressure Transducers,Proximity Transducers, Regulators, Pressure Transmitters,Strain Gauges, Torque Transducers, ValvespH and ConductivityConductivity Instrumentation,Dissolved OxygenInstrumentation,Environmental Instrumentation,pH Electrodes and Instruments,Water and Soil Analysis InstrumentationHeatersBand Heaters,Cartridge Heaters,Circulation Heaters,Comfort Heaters,Controllers,Meters and SwitchingDevices,Flexible Heaters,General Test and Measurement Instruments,Heater Hook-up Wire,Heating Cable Systems,Immersion Heaters,Process Air and Duct,Heaters,Radiant Heaters,Strip Heaters,Tubular HeatersFlow and LevelAir Velocity Indicators,Doppler Flowmeters,LevelMeasurement,Magnetic Flowmeters,Mass Flowmeters,Pitot Tubes,Pumps,Rotameters,Turbine and Paddle Wheel Flowmeters,Ultrasonic Flowmeters,Valves,Variable Area Flowmeters,Vortex Shedding FlowmetersData AcquisitionAuto-Dialers and Alarm Monitoring Systems,Communication Products and Converters,Data Acquisition and Analysis Software,Data LoggersPlug-in Cards,Signal Conditioners,USB,RS232,RS485and Parallel Port Data Acquisition Systems,Wireless Transmitters and Receivers。
引言USB通用串行总线(Universal Serial Bus>是被PC机广泛采用的一种总线，目前已经在计算机主板上大量集成，成为一种标准配置接口。
它的即插即用、真正的热插拔、可总线供电、高性能和系统造价低等一系列的优点，使得USB接口得到了广泛的应用。
特别是随着USB2.0高速传输协议的出现，其数据传输速度达到了480Mb/s，使得USB接口顤橆D挤�为今天低成本虚拟仪器系统的主流。
本文设计了基于USB2.0高速传输的数据采集系统，整个数据传输过程完全采用DMA方式，达到了较高的数据传输速度。
1、系统介绍系统总体结构如图1所示。
采用Philips公司的微控制器LPC2888作为系统核心控制器。
前端数据采集模块由一片CPLD实现对数据采集和触发控制的功能。
当系统和计算机成功连接进入工作状态后，LPC2888从USB接口接收到来自应用程序的控制命令，然后通过控制CPLD对数据采集模块采样通道、采样速率和触发模式进行配置后启动数据采集。
CPLD控制模数转换器获取采样数据，同时配合LPC2888通用DMA控制器的接口时序将采样数据以DMA方式传输到LPC2888内部缓存。
最后由USB高速设备接口将采样数据从LPC2888内部缓存传输到计算机，在计算机中实现数据记录、数据处理和波形显示等功能。
b5E2RGbCAP图1 系统总体结构图1.1 LPC2888微控制器LPC2888是一款基于ARM7TDMI内核的微控制器，带有8kB高速缓存，最高工作时钟频率60MHz。
在结构上增加了多通道通用DMA控制器(GPDMA>。
它支持存储器到存储器，存储器到外设，外设到存储器和外设到外设的DMA传输。
本系统采用GPDMA控制器实现数据从前端数据采集模块到内部缓存的DMA传输。
同时，LPC2888集成有USB高速设备控制器。
它完全兼容USB2.0协议，支持USB高速传输，理论最高传输速度480Mb/s，其内部结构如图2所示。
基于FT2232 H的USB2.0数据采集系统设计王辉;陈爱生【期刊名称】《电子器件》【年(卷),期】2015(000)001【摘要】The design of high speed and stable data collection system is based on FTDI’s USB2.0 communication chip FT2232H and FPGA. Time division multiplexing is used in analog signal acquisition. Using FPGA as system’s control core,FT2232H as USB controller and two SARAMs as data buffer,combined with A/D model the data col-lection system has been composed. The operation of data collection,data cache and data transfer are carried out par-allel in FPGA,transmission speed is 6.8 Mbyte/s,so that the data collection and tranfer efficiency are improved. The data collection system based on FT2232H has the advantages of high speed and stable in the experiment.%基于FTDI的USB2.0通信芯片FT2232H和FPGA设计了一种高速、稳定的数据采集系统。
采用时分多路复用的方法采集前端的模拟信号,FPGA作为系统的主控核心,FT2232H是USB通信模块的控制芯片,两块单口RAM组成数据的缓存区,结合A/D采样模块组成了数据采集系统。
基于FPGA和USB 2.0的数字图像采集系统设计作者：郑新钱, 王辅明来源：《现代电子技术》2011年第20期摘要：随着技术的发展，工业检测技术受到人们的重视，其中图像检测由于其具有直观，方便，信息量较全面而使得它在工业检测方面具有重要的应用。
以FPGA作为控制核心，设计了一个小型图像采集系统。
通过FPGA实现CMOS图像传感器的初始化、图像数据采集、存储、USB接口芯片的控制；使用USB 2.0接口实现图像数据传输；使用VC++编写上位机程序对图像进行实时显示。
经过测试，整个系统能够稳定工作，满足设计目标。
关键词：FPGA； CMOS图像传感器； USB 2.0； SCCB中图分类号：TN919-34 文献标识码：A文章编号：1004-373X(2011)20-0012-04Design of Digital Image acquisition System Based on FPGA and USB 2.0ZHENG Xin-qian, WANG Fu-ming(Xiamen University, Xiamen 361005, China)Abstract： With the development of technologies, the industrial detection technology has been paid more attention, in which the video detection plays an important roles in the field of industrial detection because ofintuitive, convenient and more comprehensive information from it. A small image acquisition system is design by using FPGA as the cotroller. The initialization of CMOS inage sensor, image data acquisition, storage and control of USB interface chip are implemented by using FPGA. The image data is transmitted from FPGA to host via USB 2.0 interface chip, and displayed on the host program. Testing results show that the stability of the whole system meets the design goals.Keywords： FPGA; CMOS image sensor; USB 2.0; SCCB0 引言在当今信息化的时代，在机器获取现实世界信息方面，图像由于具有信息面全、直观、方便直接的特点而受到广泛的研究。
