基于80C196单片机的在线配电监测仪

在线配电监测仪主要应用于供电过程中的电压、电流、功率、电度、功率因数、谐波畸变、奇次谐波等参数的测量和通信.本文简要介绍了一种基于80C196单片机的在线配电监测仪,具有硬件结构简单、工作可靠、适应性强等特点.     

平面型InGaAs探测结构中p型杂质的二维扩散行为研究

在平面型InGaAs P-i-N短波红外探测结构中,p型杂质在材料中纵向和横向的扩散是决定pn结位置及其光电性能的主要因素,本文采用扫描电容显微方法(SCM)获得了扩散成结InGaAs/InAlAs像元剖面的二维载流子分布,从而实现对不同扩散条件下pn电场结的精确定位和分析.此外,对于InGaAs/InP探测器,SCM...     

基于PIC12C5系列单片机的通用电源管理系统

在分析PIC12C5系列单片机和MAX715型电池管理电路工作原理的基础上,介绍一种用PIC12C5系列单片机单独管理系统电源的方法;针对各种常用单片机系统所需的电源,给出了实际的硬件设计电路和软件程序流程.     

智能仪表的CAN接口设计

目前的现场总线不下十几种,各个现场总线的规范均不一样,都有各自的适用范围.其中CAN(Controller Area Network)总线以其高性能、高可靠性及独特的设计越来越受到人们的重视,并已被公认为几种最有前途的现场总线之一.介绍智能仪表中通用CAN通信接口的硬件设计与软件实现框图.     

ZTP135S-R型传感器在体温计中的应用

红外体温计采用红外温度传感器测量体温,利用GE公司的ZTP135S-R型红外热电堆温度传感器实现对温度信号的非接触测量.详细介绍了ZTP135S-R型传感器的工作原理和性能.它与自带ADC的mega16型8位单片机相连,共同实现体温计的功能.     

基于DSP的低频数字式相位测量仪的设计

本文提出了一种基于TMS320VC5402的低频数字式相位测量仪的设计方法。     

装备保障链中信息流的管理与控制探讨

介绍了装备保障链中信息流的特点,分析了影响装备保障链管理的多种因素,描述了装备保障链管理,探讨了装备保障链的构成以及信息流管理与控制的方法,建立了信息流控制系统体系结构,为现代战争条件下装备保障信息化建设提供了建议和思考.     

Analysis of Transmission of Sub-Carrier Multiplexed Signals through the Optical Transport Network

The transmission of analog SCM signals through the optical layer of the transport network is analyzed and discussed, in order to assess the possibility of exploiting the core network for the transport of video channels, without the need of dedicated communication systems. The utilized analytical model, allowing the transmission performance to be evaluated, is reported. Some performance evaluation results are reported, taking into consideration two relevant network typologies: metropolitan networks and regional networks. The results allow the feasibility of the considered approach to be assessed, considering the available technology.     

Transmission performance of the SCM label in optical label switching networks

We have investigated the transmission performance of the label signal in the optical double sideband subcarrier multiplexing (DSB-SCM) label switching link and clarified that the degradation of the label signal results from the fiber chromatic dispersion and the incomplete filtering out of the payload carrier. Our theoretical results show that the DSB-SCM label can immune the fading effect, and the degradation mainly results from the crosstalk from the payload and the time shift of the code edge. The deep suppression of the optical carriers at the receiver can eliminate the crosstalk. The time shift of the code edges leads to the eye closure of the label codes and is independent of the code rate, but it does not degrade the label code with a low bit rate greatly, although it is serious for the label with a high bit rate and ultimately limits the transmission distance of the label. The simulation results validate our analysis very well. As we theoretically predict that the single sideband (SSB)-SCM can eliminate the time shift of the code edges and extend the transmission distance of the label signal.     

嵌入式ARM9200与MCP2510的通信

介绍了ATMEL公司AT91ARM9200和美国微芯科技公司的CAN(控制器局域网)控制器MCP2510芯片的结构和功能,重点介绍AT91ARM9200与MCP2510的SPI(串行外设接口)连接,阐述AT91ARM9200和MCP2510的初始化过程以及简单的通信过程。