基于GSM的故障实时报警控制系统的设计与实现

针对实时监控系统中的运行设备或装置的异常报警信息,设计了基于GSM无线通讯的微机监测系统,实现了多故障远程短信息报警功能,介绍了系统的软硬件设计及主要功能;经应用测试,系统具有宴时性强、稳定性高、投入成本低等特点,能将信息同时发送至多个移动通信终端,已成功应用于农业温室大棚监控系统的实时故障报警,系统也可方便地应用于工厂生产线、金融、交通及家庭安全等方面的远程监测.     

一种新的数据采集与显示系统的设计与实现

介绍了一种基于SOC的新型高速单片机,并利用该单片机,角度编码器以及电脑主机设计了一种新的角度数据采集与显示系统,同时给出了整个系统的具体实现方案。经检验,该系统具有工作稳定、界面友好、测量精度高等特点。该系统可以用于炼钢时对转炉倾角进行测量,也可以应用到工业生产中其他物体角度的测量。     

利用c8051f020实现网络测控仪器

利用SYGNAL公司的SOC单片机C8051F020、以太网接口芯片RTL8019AS、Ethernet和精简的TCP/IP协议开发基于网络的织物强力机测控系统。详细介绍了硬件接口设计,数据采集的软件实现,数据的发送及其相关数据结构的定义,接受数据的软件实现等。     

基于C8051F020的矿井127V综合保护系统的设计

针对传统的矿井127 V综合保护系统保护距离短、稳定性差和显示不精确的问题,在分析系统应具备的保护功能和自检功能的基础上,设计了以C8051F020为核心的数字化矿井127 V综合保护系统,详细介绍了系统硬件电路设计和软件设计。该系统可对3个回路执行综合保护和控制功能,能满足长距离保护的要求,系统自检功能的设计减小了系统故障引发安全事故的几率。调试结果表明,该系统功能全、成本低,能够满足现代煤矿井下的需求。     

基于USB接口的高增益数据采集系统

针对常用的通过数据采集板卡和 RS-232 串口采集数据的不足,介绍了基于USB接口的高增益数据采集系统的软硬件开发过程,系统采用集成度高的SOC单片机C8051F000作为微处理器,PDIUSBD12作为USB控制芯片,能够快捷、方便地完成电压信号采集,及与计算机之间的USB通信.     

可拓学在CPC产品开发过程建模中的应用

提出将可拓学应用产品开发过程领域,建立协同产品商务的理论体系及其支撑技术总体构架,借助过程仿真支撑环境,开发一条企业对产品开发过程进行创新性设计和自适应设计的途径,并在此基础上,开发实现了一个基于Web的模型驱动企业产品开发过程快速设计、优化与管理原型系统,从而为企业进行产品开发过程的创新模型设计和自适应模型设计提供新的思想、方法和工具,有助于企业在加入WTO后快速适应动态多变、不可预测的全球性市场竞争环境,缩小与发达国家同行们的差距。     

分布式调度算法在VOQ交换机中的应用

为提高高速通信网络的通信效率,针对VOQ交换机,提出在交换机的各个输出端口中进行分布式通信调度(DSA)的策略。DSA算法可直接支持变长数据包通信调度,克服了传统信元交换只能调度定长数据包的缺点,降低了交换机的实现复杂度。仿真结果表明：在各种流量下,DSA算法都比信元调度算法具有更好的调度性能。     

车载激光甲烷遥测系统的设计

为了解决传统燃气巡检设备检测效率低、检测距离近的问题,文章结合可调谐激光吸收光谱技术和地物的后向散射特性, 设计了一套车载激光甲烷遥测系统,并进行了模拟测试。测试表明,该系统对甲烷气体的最低检测限为5 umol/mol,可探测距离150米,体积分数为0.1%的甲烷气体泄漏,并能在车速为50km/h行驶时,检测到燃气泄漏点,检测距离远、响应速度快、灵敏度高、抗干扰能力强,很好的满足实际探测需要。通过燃气公司实际应用表明,该系统极大地提高了燃气巡检效率,减少燃气巡检周期,非常适合长输管线的快速巡检,实用性强。     

漫反射光电开关在除草机器人中的应用

光电开关是一种利用光的强弱变化实现电的变化的一种传感器.简述了光电开关的概念、工作原理、分类以及优缺点,总结了漫反射光电开关在智能除草机器人中的实际应用,指出漫反射光电开关是保证除草机器人准确、高效除草的有效手段.该方案不仅大大降低了硬件成本,而且也不需要做图像处理的算法,同时避免了农药除草对作物的伤害,提高了劳动生产率.但是光电开关也有其自身的局限性,单个光电开关无法区分物体的形状,颜色,大小,因此还要对光电开关内部结构进行研究开发.     

Application of Hyper-Spherical Search algorithm for optimal energy resources dispatch in residential microgrids

This paper presents a residential hybrid thermal/electrical grid-connected home energy system (HES), including a fuel-cell with combined heat and power and a battery-based energy storage system. The minimum operation cost of this integrated energy system is achieved by proper scheduling of different energy resources, found by applying a new powerful optimization algorithm, the Hyper-Spherical Search (HSS) algorithm, to the system's scheduling problem. This is the first time that HSS is used to face the energy resource dispatch problem. The HSS has been only tested in mathematical problems in the previous study. The optimization procedure generates an efficient look-up table in which the powers generated by different energy resources are determined for all time intervals. The effect of different electricity tariffs for purchasing electricity from the main grid on the operation costs of the system is investigated. Moreover, a battery is properly dispatched in the energy system to decrease the operation costs. A real load demand is used in the simulation. The results of HSS are compared with the harmony search algorithm and the colonial competitive algorithm to show the power and effectiveness of HSS to find the optimal dispatch strategy of energy resources for the first time. This is the first time that HSS is compared with CCA. The results of this paper are expected to contribute to home energy systems and real projects.     

One-point-plus for 5-DOF localization of vehicle-mounted omnidirectional camera in long-range motion

This paper proposes a method for localization of vehicle using one point plus an edge matching region of monocular vision in wide urban environments. The five degree of freedom (5-DoF) localization estimated by monocular omnidirectional camera improves the planar motion assumption in most of conventional researches. In recent year, the car-like motion model with planar motion is often investigated to reduce the requirements of correspondence until one point. However, in the real application of long-range motion in outdoor scene, the motion may not satisfy this condition. This leads to the inaccurate vehicle localization. In this proposed method, the car-like model is also utilized for 5-DoF localization however the requirements of correspondence are reduced to only one point plus an edge matching region which is much simpler than the conventional 5-point RANSAC. The cumulative errors of visual odometry are excluded by using global positioning system (GPS) correction under equation of maximum likelihood estimation in Extended Kalman Filter (EKF) frame work. The real application in hills and mountainous regions demonstrates the accuracy of vehicle localization using this proposed method.     

Double dispatch in C++

Double dispatch is the ability to dynamically select a method not only according to the run‐time type of the receiver (single dispatch), but also according to the run‐time type of the argument. This mechanism unleashes the power of dynamic binding in object‐oriented languages, so enhancing re‐usability and separation of responsibilities. However, many mainstream languages, such as, e.g., C++ and Java, do not provide it, resorting only to single dispatch. In this paper we propose an extension of C++ (also applicable to other object‐oriented languages) that enables double dispatch as a language feature. This yields dynamic overloading and covariant specialization of methods. We define a translation from the new constructs to standard C++ and we present the preprocessor implementing this translation, called doublecpp . The translated code enjoys static type safety and implements the semantics of double dispatch by using only standard mechanisms of static overloading and dynamic binding, with minimal impact on the performance of the program. Copyright © 2006 John Wiley & Sons, Ltd.     

模态参数辨识在压力开关同步检测中的应用

在介绍压力开关同步时间检测方案的基础上,提出了一种基于Laplace小波匹配的经验模式分解(EMD)模态参数辨识法.以汽车空调用的压力开关作为研究对象,采用锤击激励法和白噪声激励法进行了开关膜片翻转振动识别试验.结果证明:该方法能有效地克服白噪声和脉冲噪声干扰,在多模态混叠和模态密集的情况下仍能准确提取出特征模态参数,...     

混沌频率调制技术在商用开关电源中的应用

提出一种在商用开关电源中实现混沌频率调制,从而抑制电磁干扰的方法。混沌频率调制技术是基于混沌信号的连续频谱的特性,将其用于开关电源消除开关信号谐波的尖峰,达到抑制EMI的目的。该方法利用蔡氏电路设计了混沌频率调制电路,用于驱动开关电源PWM芯片的振荡器,实现开关频率的调制,使原本离散的开关信号频谱拓展到一定的频率范围。采用一个商用反激恒流源作为实验载体,仿真和实验结果表明,该方法在确保系统稳定的基础上,能实现EMI的抑制。     

Multiple dispatch in reflective runtime environment

Message dispatch in object-oriented programming (OOP) involves target method lookup in dispatch table/tree. Reflective environment builds dispatch data-structure at runtime as types can be added at runtime. Hence, algorithms for reflective environments require dynamic data structure for dispatch. In this paper, we propose a tree-based algorithm for multiple dispatch in reflective runtime environment. New classes can be added to the system at runtime. Proposed algorithm performs lookup in time proportional to $\log (n)$ times the polymorphic arguments, where n is number of classes in a system. Proposed algorithm uses type-safe approach for multimethod lookup resolving ambiguities. We compare performance of the proposed algorithm with the dispatch mechanism in commonly used virtual/reflexive systems, e.g., Java and Microsoft's Common Language Runtime (MS-CLR), in respect of efficiency and type-safety.