基于DSP和CAN总线的数据采集与处理系统

在电力系统中高效、快速、准确采集电压、电流是一个非常关键的问题,针对这个问题,给出了一种使用内嵌CAN控制器的数字信号处理器TMS320LF2407A与A/D转换芯片ADS7864构成的数据采集系统方案.该方案硬件系统结构简单,性能可靠.详细叙述了系统的结构和软硬件设计,并且给出采用CAN总线技术与上位机通信的方案.     

ADS40数字传感器的摄影测量处理与应用

ADS40是机载多线阵CCD推扫方式成像的多功能数字传感器,可以同时获取高分辨率多光谱和全色数字影像,并能满足数字摄影测量与各种遥感应用的需求.线阵列推扫式的成像方式使得ADS40与传统框幅式相机存在很大的区别,CCD探测器采样期间受气流不稳等因素的影响,导致姿态角发生变化,获取的影像存在着较大的影像变形,这种变形不仅影响视觉效果,更为严重的影响了数字摄影测量软件对其的应用.因此,对ADS40原始影像进行处理,消除影像的变形问题,具有十分重要的意义.     

Ku波段低噪声放大器设计与仿真

低噪声放大器是微波接收前端的重要组成部分。文章应用LNA设计理论,使用ADS仿真软件,设计和仿真了一个Ku波段的低噪声放大器。该放大器选用Agilent公司的低噪声放大管ATF36077（PHEMT）,采用微带分支线匹配结构和两级级联的方式,获得了良好的仿真结果。     

File Transfer Algorithm for Autonomous Decentralized System

A file transfer algorithm based on ADP (autonomous decentralized protocol) was proposed to solve the problem that the ADS (autonomous decentralized system) middleware (NeXUS/Dlink) lacks of file transfer functions for Windows. The algorithm realizes the peer-to-peer file transfer, one-to-N inquiry/multi-response file transfer and one-to-N file distribution in the same data field based on communication patterns provided by the ADP. The peer-to-peer file transfer is implemented through a peer-to-peer communication path, one-to-N inquiry/multi-response file transfer and one-to-N file distribution are implemented through multicast commtmieation. In this algorithm, a file to be transferred is named with a GUID ( global unique identification), every data packet is marked with a sequence number, and file-receiving in parallel is implemented by caching DPOs (data processing objects) and multithread technologies. The algorithm is applied in a simulation system of the decentralized control platform, and the test results and long time stable mrming prove the feasibility of the algorithm.