多通道同步数据采集系统设计与实现
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毫米波摄相机的多通道精确同步信号采集系统设计 一55一
●应用与设计 毫米波摄相机的多通道精确同步信号
采集系统设计
谭渊,杨勇,孙江平,袁乃昌
(国防科技大学微波技术发展中心,湖南长沙410073)
摘要:根据毫米波成像系统对各接收单元相位的要求,介绍了一种硬件采用PCI一6133采集卡,软
件采用LabVIEW编写其配置控制程序的精确同步信号采集系统。在系统的输出端增加了数字下
变频模块.目的是将信号变频至零中频附近.为后续信号处理奠定基础。应用证明,同步信号采集
系统具有较高的同步性能,满足成像处理要求。 关键词:毫米波成像;同步采集;LabVIEW;数字下变频;PIC一6133
中图分类号:TP274 文献标识码:A 文章编号:1006—6977(2007)11-0055—03
Design of multi-channels synchronous signal acquisition system
in millimetric wave camera
TAN Yuan,YANG Yong,SUN Jiang-ping,YUAN Nai-chang (Microwave Center,National University of D Technology,Changsha 410073,China)
Abstract:Considering the rigid need of phase between each receive cell in microwave imaging system,
a synchronous signal acquisition system is described which hardware is based on PCI-6 133 and soft— ware is based on LabVIEW.In order to transform the signal ̄equency to a low intermediate ̄equency,
多通道振动信号同步采集系统设计与应用
饶忠炜;邵扬;马杰;王森;刘丽兰
【摘 要】In order to solve the problems of equipment vibration signal
acquisition and analysis in the process of operation in wisdom
workshop .taking the LabVIEW software as development platform ,
through signal processing technology , a set of system of multichannel
parallel vibration signal acquisition based on the TCP /IP protocol was
developed .The feasibility of the system was verified.The results show the
system can quickly and efficiently acquire , process and analyze data, the
operation is simple, the function is all ready , the cost is low .It is significant
for the equipment fault diagnosis , accident prevention , and further im-proving production economic benefits .%为了解决智慧车间设备运转过程中振动信号采集及分析的问题,以LabVIEW为上层软件的开发平台,利用信号处理技术,研发了基于TCP/IP协议的多通道振动信号同步采集系统,并通过实验验证了系统的可行性.实验结果表明,该系统能快速有效地对数据进行接收、处理以及分析,操作简单,功能齐全,成本较低,对设备进一步进行故障诊断、事故预防和提高生产经济效益具有重要意义.
基于FPGA的多通道数据采集控制器设计与实现
赵涛;郭猛;顾亚浏;章阳
【摘 要】In order to improve the real-time performance of Data
Acquisition Controller(DAC) based on general PC,a multi-channel real-time
data acquisition controller is designed.By using the Field Programmable
Gate Array (FPGA) hardware technology,the data acquisition of the finite
state machine is used to replace the CPU serial instruction to realize
channel switching and data cache,which can reduce the load of the
system.Based on the new data acquisition controller architecture,a
timestamp synchronization mechanism is proposed to improve the real-time performance of the DAC control system with the multi-level buffer
mechanism,and the logic of the controller is successfully transplanted to
the Cyclone IV chip for implemention.The test results show that the
proposed controller can alleviate the load of CPU and operating
第32卷第5期 2010年5月 现代雷达 Modern Radar V01.32 N0.5 Mav 20lO
・信号/童炙据处理・ 中图分类号:TN958 文献标识码:A 文章编号:1004—7859(2010)05—0044—04
多通道高速数据采集处理系统设计与实现
陈 波,陆必应,周智敏
(国防科技大学电子科学与工程学院, 长沙410073)
摘要:为实现某多通道雷达接收机,设计了一种带数据预处理功能的八通道数据采集系统,其具备LINK口和CPCI总线两
种高速输出接121,单通道最高采样频率为125 MHz,分辨率14 bit。讨论了系统硬件解决方案 熬件逻辑实现,实测结果表
明该系统有效位数高达9.9 bit,通道延时差为4o ps,已成功运用于某雷达接收机。
关键词:多通道;数据采集;实时处理
Design and Implementation of Multi・-channel High--speed Data
Acquisition and Processing System
CHEN Bo,LU Bi—ying,ZHOU Zhi—min
(School of Electronic Science and Engineering,NUDT,Changsha 410073,China)
Abstract:An eigh£-channel data acquisition system with data preprocessing function is designed for a multi—channel radar receiver.
There a two kinds of high—speed output interface which are LINK port and CPCI bus.Sampling rate of its single channel is up to