基于ARM和GPRS的无线远程IAP的研究与实现

针对电力监控设备终端软件升级的需要,讨论了终端软件升级的方法,设计了基于ARM（LPC2368）的GPRS无线远程IAP系统。介绍了系统的工作原理、硬件组成、软件设计流程等,并详细介绍了GPRS模块的通信协议,给出了部分程序代码。该系统能较好地解决电力监控设备终端软件升级问题。     

基于LPC2210的远程数据采集终端设计

针对目前应用于工业现场的远程数据采集系统普遍存在的数据传输协议不统一且需要单独敷设通信线路等问题,以ARM7处理器LPC2100和嵌入式实时操作系统μC/OS-ll为基础,设计了一种应用互联网实现数据采集的远程终端.该终端可定时采集温度、压力、电流、电压等8路模拟信号,在本地显示的同时,可将采集数据通过TCP/IP协议上传到Internet,在通用的网络上实现工业现场数据的远程传输.     

基于ARM7的自动扶梯控制系统

阐述了一种基于ARM7微处理器LPC2368在扶梯控制系统中的应用,给出了控制系统的组成框图、输入接口电路、输出接口电路、LED显示电路、CAN通信电路及程序设计流程图,简单介绍了系统的开发调试环境——Keil for ARM,与传统自动扶梯控制系统相比较,以LPC2368为主控制器的控制系统具有稳定性高,易于维护等特点,使得自动扶梯的控制系统更加智能化。     

基于GPRS的电梯在线监控系统的设计

为了解决信号在CAN总线中的有效传输距离有限的问题,提出了一种基于嵌入式ARM处理器和GPRS无线通信技术的电梯远程监控系统方案。该方案通过LPC2148和EM310组成的电梯终端来将电梯的运行状况和故障信息经GPRS网络发送到远程监控中心,然后对监控中心上位机软件进行操作来实现电梯的远程监控,从而解决了信号传输的距离问题。     

基于GPRS的电梯在线监控系统的设计

针对信号在CAN总线中有效传输距离有限,对采用CAN总线技术的电梯远程监控系统提出了一种基于嵌入式ARM处理器和GPRS无线通信技术的电梯远程监控系统的方案.通过由LPC2148和EM310组成的电梯终端将电梯的运行状况和故障信息,经GPRS网络及时发送到远程监控中心,然后经由监控中心上位机软件的操作,实现了电梯的远程监控,解决了信号传输距离的问题.     

基于ARM的智能车载终端设备系统的设计

设计了一种新型智能车载终端设备系统,以ARM微处理器LPC2103为硬件核心,在嵌入式μC／OS—Ⅱ操作系统平台上,运用IC刷卡、GPS、GPRS等技术,实现了公交车刷卡消费、语音提示、LCD液晶显示、实时定位和远程监控、调度等功能。本文主要对智能车载终端系统的总体方案、硬件设计和软件设计进行了详细的介绍。     

基于ARM智能电力协议转换器的设计

介绍如何使用ARM处理器实现一个电力规约串口协议转换的原理和设计过程。在设计中,软件主要是针对前台接受远程终端发来的命令启动抄表后台识别命令并开始抄指定的电表;在硬件设计中,使用PHLIPS公司的LPC2138处理器提高了系统的集成度和可靠性,采用uc/os-II操作系统进行任务的管理和调度,方便系统升级。     

基于ARM-LPC2368的网络接口的设计与实现

本文以微处理器LPC2368为核心、DP83848C为以太网物理层接口芯片.详细地介绍了嵌入式以太网接口的实现方法.首先对微处理器LPC2368和物理层芯片DP83848C作了简单的介绍.然后给出了基于LPC2368的以太网接口的硬件设计.最后简述了其软件的实现过程.     

基于ARM智能电力协议转换器的设计

介绍如何使用ARM处理器实现一个电力规约串口协议转换的原理和设计过程：在设计中，软件主要是针对前台接受远程终端发来的命令启动抄表后台识别命令并开始抄指定的电表；在硬件设计中，使用PHLIPS公司的LPC2138处理器提高了系统的集成度和可靠性，采用UC／OS-Ⅱ操作系统进行任务的管理和调度，方便系统升级。     

基于ARM嵌入式以太网接口的设计

介绍了一种嵌入式以太网接口的设计与实现方法。首先对微处理器LPC2368和物理层芯片DP83848C作了简单的介绍,然后给出了基于LPC2368的以太网接口的硬件设计,最后简述了其软件的实现过程。     

Conversion method and system

In the classical conversion method, the light that passes the medium is converted to the photosignal. Then, it is amplified by an amplifier having linear characteristics. Considering the amplitude of the amplified signal, the measured parameter is determined. In the proposed conversion method, the intensity of the reference light that falls on the medium is inversely modulated with respect to the absorption function. The intensity of the light used for the measurement is kept constant. The intensity modulated reference light and the measurement light, which are in inverse phases, pass through the medium subsequently. Then, they are detected by a photodetector. At the output of the photodetector, the phase changing instant of the obtained signal and the duration between the starting instant of the reference light and the phase changing instant are determined. Considering this duration, the value of the measured parameter is determined. The proposed conversion method linearizes the conversion phenomenon. The photodetector does only detect the instant at which the reference light and the measurement light are similar. The photodetector operates as an indicator. The measured parameter is converted to the pulse duration or the number of pulses. The value of the measured parameter can be directly obtained at the output of the photodetector. The comparison and the mathematical operations are directly achieved on lights. Analysis of the proposed method and application examples are given in the paper.     

Numerical and experimental study of the virtual quadrupedal walking robot-semiquad

SemiQuad is a prototyped walking robot with a platform and two double-link legs. Thus, it is a five-link mechanism. The front leg models identical motions of two quadruped's front legs, the back leg models identical motions of two quadruped's back legs. The legs have passive (uncontrolled) feet that extend in the frontal plane. Due to this the robot is stable in the frontal plane. This robot can be viewed as a "virtual" quadruped. Four DC motors drive the mechanism. Its control system comprises a computer, hardware servo-systems and power amplifiers. The locomotion of the prototype is planar curvet gait. In the double support our prototype is statically stable and over actuated. In the single support it is unstable and under actuated system. There is no flight phase. We describe here the scheme of the mechanism, the characteristics of the drives and the control strategy. The dynamic model of the planar walking is recalled for the double, single support phases and for the impact instant. An intuitive control strategy is detailed. The designed control strategy overcomes the difficulties appeared due to unstable and under actuated motion in the single support.Due to the control algorithm the walking regime consists of the alternating different phases. The sequence of these phases is the following. A double support phase begins. A fast bend and unbend of the front leg allows a lift-off of the front leg. During the single support on the back leg the distance between the two leg tips increases. Then an impact occurs and a new double support phase begins. A fast bend and unbend of the back leg allows the lift-off of the back leg. During the single support on the front leg the distance between the two leg tips decreases to form a cyclic walking gait.The experiments give results that are close to those of the simulation.Funding for SemiQuad was primarily provided by the CNRS and the region Pays de La Loire.     

Designing the rule classification with oversampling approach with high accuracy for imbalanced data in semiconductor production lines

The product quality is the major factor for enhancing the production ability and competitiveness. Decreasing the cost and increasing production capacity are common approaches to realize the enhancement of the product quality. The production managers apply various multimedia data to evaluate the product quality. For example, capturing the stamping sound to evaluate the correct cutting and taking the component image to measure the chip positions are common heterogeneous multimedia data that are applied to manufacturing. However, the production managers prefer to minimize the number of defective products, e. g. the secondary operation and fixing the product tolerance in the assembly stage, to fitting the production target. Therefore, contrasting the defective product identification procedure with high accuracy becomes a challenge due to the decrease of the number of the defective products. In this paper, we propose the Rule Classification with Oversampling (RCOS) approach to provide the high accuracy with few defective products. The proposed RCOS includes the oversampling technique and the rule classification approach to emphasize the properties of the defective products and provide the precise classes. Given few defective products, capturing the properties of the failure is difficult. The RCOS considers the revised Synthetic Minority Over-Sampling Technique (SMOTE) to highlight the failure properties, and then the rule model is considered to extract the root cause of the defective products. We implement the proposed RCOS in the semiconductor production line. From the experiment results, the proposed RCOS provide about at most 98% in accuracy, and the comparison shows that the results have been improved in common criteria e. g. the true-positive rate, G mean, F1 score, and False Alarm Rate. Therefore, the proposed RCOS provides high practicality for the implementation consideration.

     

一种基于二维可逆映射的图像加密算法

提出了二维可逆映射在图像加密中的应用.可以通过置乱图像像素位置实现图像加密.二维可逆映射可以高效地实现图像像素置乱.二维可逆映射由压缩拉伸和折叠两个子映射组成.压缩拉伸映射,使原始图像变换成线,折叠映射使线变换成图.所有可逆映射构成了可逆映射集合.经过扩散处理改变像素值,实现图像加密.二维可逆映射的引入扩大了密钥空间,并增强了对密钥变化的敏感度.新的加密方法提高了加密图像的安全性且加快了加密速度.仿真验证了二维可逆映射图像加密算法的有效性.     

FB-CS模型的两层嵌套机动目标跟踪算法

针对转弯机动目标,提出了一种两层模型嵌套的跟踪算法.算法的内层模型由基于函数的“当前”统计(Function based current statistic,FB-CS)模型构成,该模型在“当前”统计(Current statistic,CS)模型的基础上,通过加权一个以新息方差之迹为参数的活化函数,对加速度方差和机动频率进行自适应处理,再针对目标的速度方向角进行滤波,将获得的角速度估计值作为外层的输入;外层模型由曲线模型构成,其方向角度、角速度和角加速度由内层模型提供.由于既准确估计目标的角速度,又设计了合理的运动模型,算法显著提高了转弯机动目标的跟踪精度.仿真实验验证了算法的有效性.     

Passive mixing of co-flowing slugs in grooved microchannels

The anisotropic grooves in a microchannel induce spiral circulation around the flow axis. The stretch and fold of the streams result in a passive mixing. This article describes the effectiveness of induced crossflow, arising from the grooves, placed at the floor of the microchannel. The results from numerical simulation show the extent of local mixing achieved at various positions around the groove. The emphasis here is to understand the mixing when the two streams enter the channel, and displace air while flowing alongside each other. Microchannels with slanted grooves and staggered herringbone type grooves are considered here. The FLUENT 6.2 software and the Open FOAM software were used for the simulation. The latter was primarily utilized for tracking of the interface when a liquid slug displaced air from the micromixer. At a Reynold’s number of about 1.0, low velocity pockets could be identified near the two ends of the ridges. These pockets did not support crossflow and mixing. The herringbone type micromixer was found to have the best mixing effectiveness, when the advection dominates mixing. This advantage is mostly lost at the higher values of diffusivity, as a crossflow became less important for mixing. These observations were made when one of the streams is 1.5 times more viscous than the other, and the mixture-rule governed the viscosity of the mixed stream. When the liquid front enters the microchannel for the first time, the front had to displace air from the channel. At first, the upper part of the channel was swept. This was immediately followed by the sweeping of the groove-part in the floor. Higher hydraulic resistance in the grooves resulted in this non-uniform movement of the front. The co-flow of streams could either be continuous over the entire length of the channel, or in the form of slugs that maintained an interface with air. At a particular position in the channel, the extents of mixing were compared for the two modes of co-flow. The extent of mixing was found smaller in the slug, next to the interface with air. Lack of axial dispersion with preceding liquid stream seems to be the reason for this trend.     

粗糙集理论在故障诊断中的问题分析

粗糙集理论能对系统中的冗余信息进行约简,但其处理过程完全基于样本集,样本集的完备性对其处理结果有直接影响.对粗糙集理论及其在故障诊断中属性约简存在的问题进行了分析,通过实例证明了在故障样本集不完备的情况下,利用粗糙集进行的属性约简会由于新故障样本的引入而导致前后约简结果的不一致,从而影响诊断的准确性;指出了该问题产生的关键原因及解决的办法,并给出了相关的实现算法,以提高系统的故障诊断自适应性.     

Sensor system of a small biped entertainment robot

SDR-4X II is the latest prototype model of a small biped entertainment robot. It is the improved model of SDR-4X. In this paper we report on the sensing system of this robot, which is important and essential for a small biped entertainment robot which will be used in the home environment. One technology is the design of the motion sensing system, i.e. the inclination sensor system and the force sensor system which obtains the inclination of the trunk and the foot with force. Another technology is the real-world sensing system. One aspect is the touch sensing system. The robot is used in a normal home environment, so we should strongly consider the safety aspects for human. Another is the vision sensor system. The configuration and the distance image acquisition are explained. Next is the audio sensor system which obtains the sound and the voice information. The hardware system and the direction recognition are explained. These sensing systems are the key to making the biped robot walking and dynamic motion highly stable, and understanding the real-world around the robot.     

机器人足球比赛截球策略设计

在机器人世界杯足球锦标赛(TheRobotWorldCup,简称RoboCup)中,截球效率直接影响到比赛的结果。通过足球截球模型,建立方程,从而求出截球位置。解方程的根是提高截球效率的关键,本文采用高效的弦割法来快速计算方程的根。试验发现方程曲线的变化对弦割法解方程根的效率有很大影响,曲线的形状直接影响了弦割法的收敛速度。为加速收敛性,对弦割法进行了优化。最后与优化前的弦割法以及二分法进行了比较,结果表明优化后整体性更为高效,很好地满足了比赛的要求。     

Greedy algorithms for eigenvalue optimization problems in shape design of two-density inhomogeneous materials

This paper studies the eigenvalue optimization problems in the shape design of the two-density inhomogeneous materials. Two types of greedy algorithms are proposed to solve three optimization problems in finite element discretization. In the first type, the whole domain is initialized by one density. For each problem of the eigenvalue optimizations, we define a measurement of the element, which is the criterion to determine the ‘best’ element. We change the density of the ‘best’ element to the other density. Then the algorithm repeats the procedure until the area constraint is satisfied. In the second type, the algorithm begins with the density distribution satisfying the area constraint. Also, according to the measurement of the element, the algorithm finds a pair of the ‘best’ elements and exchanges their densities between each other. Furthermore, the accelerating greedy algorithms are proposed to speed up both two types. Three numerical examples are provided to illustrate the results.