Detection Algorithm Based on Consecutive FramesSubtraction and Codebook Model

中文摘要：针对视频检测对实时性和准确性的要求, 提出了将帧间差分与码书模型相融合的运动目标检测算法。首先, 选取某个 t 时间内采集到的视频图像作为训练图像, 对图像的每一个像素点建立码书模型。把码书模型中表示前景的码书去除, 余下 的作为背景模型用于检测。检测运动目标时, 先将待检测的相邻帧图像进行帧间差分, 得到变化区域和没有变化的区域, 将 有变化的区域与背景模型进行拟合, 区分出前一帧运动区域和目标运动区域。更新背景模型时以不同的更新方法对前一帧 运动区域和目标运动区域进行更新。 英文摘要：Aimed at the real- time and veraci ty of current algori thm for detecting moving objects ,an algori thm bas ed on two con- s ecutive frames subtraction and codebook model is pres ented.Firs t,s elect the video images which are col lected in a con- s ecutive time as the training images ,es tabl ish a codebook for every pixel of the images .From the firs t two images on,sub- tract two cons ecutive frames to find out moving areas and background areas .Compare the moving areas wi th the back- ground model to decide whether the moving area is the moving objects or not.The background updating algori thm varies in the rate of updating according to the different areas of the image

工控机在远方数据终端的应用

本文主要介绍基于工业控制级系统计算机的新型远动数据采集系统设计与实践，内容包括 r T u 系统的硬件配置和软件设计，交流采样的实现等。该系统设计思想适用于电力系统和其它领域作远方数据采集

New mechanism of cable anti-theft based on impedance discontinuity measurement methods

为了解决目前低压电力电缆防盗机制的局限性和缺陷,分析对比了目前各种电缆防盗技术的原理及优点,提出了加载直流电压法和采用交流采样的阻抗测量算法相结合的一种新型综合电缆防盗机制。该机制采用模糊逻辑判断阻抗及电流的特性,根据微机电缆保护的整定值,通过对盗割电缆时电流动态分析,快速给出可靠的报警信号。This paper analyzes the principles and advantages of current cable guard alarm technologies.The limitations and defects of low-voltage power cable guard alarm mechanism at present are given,A new method is suggested,which combines impedance measurement algorithm of alternating sampling and DC voltage load method,and the new mechanism for an integrated cable guard alarm system is proposed.The mechanism uses fuzzy logic to judge the quality of the current and calculate the protection setting value.The new method can give out reliable alarm signal through electric current dynamic analysis when the cable is cut off and stolen

Transplanting of μCOS-II to 80C196KC

介绍μCOS-II操作系统在80C196KC芯片上的移植流程,以及使用C196与ASM196语言进行混合编程的注意事项。The paper introduced how to transplant the operation system of μCOS-II to 80C196KC chip and the notice for attention of compound programming with the C196 and the ASM196 languages

Design of Wireless-relay Based on CDT Message

介绍在无线中继上进行CDT报文分析的软件设计,以及在51内核的芯片上用C语言和汇编语言进行混合编程的注意事项。The paper introduces the software design of analyzing the CDT message in the wireless-relay and the points for attention on the compound programming with C and Assembler languages in the chips of 51-kernel

小波分析及其在电力系统扰动检测中的应用

文章介绍了小波变换的基本原理和一种小波变换的快速算法——Mallat算法。在此基础上将其应用于电力系统中的电力信号的检测和故障诊断中,对故障信号进行分解与重构并用Matlab进行仿真。仿真结果表明:利用小波分析诊断电力系统的扰动信号非常的精确

Microcomputer's Data Acquisition Based on Modbus Protocol

详细论述了W77E58与PC机串口通信的硬件接口电路特点以及软件编程方法,设计了数据采集的硬件电路与数据知识基于MOdbuS协议表示的算法。标准MOdbuS协议是当前在工业控制当中使用广泛一种通信协议,而且已经成为一种通用的工业标准。数据采集系统运行稳定,能够准确接收到现场单片机采集的信息,具有一定的实用性。This paper describes the hardware interface circuit and the software programming about the serial communication between the W77E58 and the computer,also designs the hardware circuit of data acquisition and the arithmetic of data tran- scription based on Modbus protocol.The standard Modbus protocol is a communication protocol which is used widely in industrial control,and it has become a universal industrial standard

An SMS alarm processing scheme in GSM

介绍GSM移动通讯系统的AT指令,GSM短消息的格式、编码和解码方法,在此基础上在上位机搭建起电力监控系统短信报警平台,通过GSM移动通信网络,实现了上位机与短信报警终端的实时通信,从而得以对郊外无Internet网络覆盖地区的电力电缆进行实时监控和报警.同时,对短信息内容的分类、设计和识别也进行了一些探讨.This paper introduces the AT instruction,the format,coding and decoding of short message in the global system for mobile communications(GSM).Based on these,a short message service(SMS) alarm processing scheme is built in the computer for the monitoring system of power transmission.It enables real-time communication between the computer and the electric cable burglar alarm facilities within the GSM,thus monitors the cable and guards against its theft in non-Internet suburban areas.Some discussion about the classification,design and recognition of short message contents is also included.厦门大学校内基金资助项目(0015-K81096

Design of Street lamp Remote Monitor Alarm System

中文简要：介绍基于 GPRS 技术和 Internet 的路灯监控系统的设计结构, 强调了报警功能模块的设计与实现。通过分析产生电流越限和电缆故障的各种原因, 画出报警设计的逻辑图。 英文摘要：This paper introduces the des ign s tructure of s treet lamp moni tor sys tem which is bas ed on GPRS technology and In- ternet briefly,and emphas izes the implementation and des ign of alarm function module.It shows the logic diagram of alarm des ign by analyzing reasons of current spi l lage and cable malfunction

Research on GOOSE Communication for Low-voltage Bus Protection in Digital Substation

以某数字化变电站改造工程为研究对象,在10 kV母线段增加简易母线保护,并采用gOOSE网络通信机制取代传统保护之间的锁联信号,解决了传统方式下各个出线保护和分段保护与简易母线保护之间存在较多硬开入连线,二次回路复杂的问题,提高了简易母线保护的可靠性,同时解决了原来控制保护系统存在的保护死区、开关失灵等问题。One digital substation reconstruction project is taken as the research subject,where simple bus protection is installed on the part of 10kv bus,and the blocking signal in the traditional protection is replaced by GOOSE network mechanism.Accordingly,the old problems of large amount of hard wiring and the complex secondary circuit have been solved.Meanwhile,this new system has enhanced the reliability of the simple bus protection and solved the problems of protective dead zone and switch malfunction in the conventional control and protection system.国家自然科学基金资助项目(60704042)---