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1.
针对目前煤矿采掘工作面便携式瓦斯报警仪监控过程中存在繁琐、枯燥的现场报数问题,提出了采用摄像机对便携式瓦斯报警仪进行实时监控并对监控视频图像序列进行图像处理和识别的方法;详细介绍了瓦斯浓度自动识别过程中的图像预处理、边缘检测和瓦斯浓度示数区域分割方法,即采用图像灰度化法和中值滤波法对监控图像进行预处理,分别使用Roberts边缘算子、Prewitt边缘算子、Sobel边缘算子对瓦斯浓度示数区域的图像边缘进行提取,通过Hough变换对瓦斯浓度示数区域附近的边缘直线进行检测,实现对目标图像的分割。  相似文献   

2.
介绍了镍氢电池管理系统的组成和工作原理。通过主控芯片对单体电池电压的精确测量和镍氢电池的特性分析实现充放电过程控制。采用闭环控制达到恒流充电,监测放电电流和电池组温度,通过UART实现管理系统与外部设备通讯。  相似文献   

3.
针对目前气体泄露检测报警装置存在检测精度低、报警方式单一等问题,设计一种便携式CO气体泄漏报警仪.报警仪以MSP430F135芯片为控制核心,以声光、震动、短信模块为报警主体,通过CO传感器获得CO体积分数,经过数据去噪、放大、A/D转换、安全验证、报警触发和实时显示等流程完成气体泄漏的实时监测和处理.为了同时满足安装和便携两种方式,内置了外置供电和充电模块自动切换,实时显示电量和提醒充电,经过实验室测试和现场测试,该气体报警仪具有便捷、高精度、低功耗、多模式报警、操作方便等多种优点.  相似文献   

4.
AQ 1029—2007《煤矿安全监控系统及检测仪器使用管理规范》有关传感器设置拟修订的主要内容包括:采煤工作面回风隅角设置甲烷传感器;煤与瓦斯突出煤层采煤工作面进风巷和掘进工作面的进风分风口处增设甲烷传感器;"便携式甲烷检测报警仪"修改为"便携式无线甲烷检测报警仪",增加了无线传输要求;增加掘锚一体机、连续采煤机、锚杆钻车、梭车、矿用防爆型柴油机车、无轨胶轮车等瓦斯监测要求;煤与瓦斯突出煤层采煤工作面回风巷和掘进巷道回风流中增设风速传感器;煤与瓦斯突出煤层采煤工作面进风巷和掘进巷道的进风分风口处增设风向传感器等。  相似文献   

5.
继镍镉、镍氢电池之后,可充电锂离子电池以其优良的特性,越来越被人们所重视,已广泛应用于手机、摄录像机、笔记本电脑、无绳电话、电动工具、遥控或电动玩具、照相机等便携式电子没备中。锂离子电池的负极为石墨晶体,正极通常为二氧化锂。充电时锂离子由正极向负极运动而嵌入石墨层中。放电时,锂离子从石墨  相似文献   

6.
针对纯电动汽车续驶里程短的缺点,提出了一种新型基于开关磁阻发电机(Switched Reluctance Generator,SRG)风力发电的双电压式电动汽车供能系统,在车辆行驶或静止时利用SRG风力发电对车载镍氢电池充电,也可给车内其他负载供能,利于增大电池可利用区域。给出并分析基于SRG的镍氢电池充电系统结构,建立SRG发电数学模型,采用电流跟踪Buck电路控制充电电流,省去了常规充电中的变流环节;分析研究镍氢电池的充电特性,采用恒流和模糊控制混合调节充电电流大小,以使电池端电压平稳上升,优化充电过程。建立基于SRG的镍氢电池充电系统仿真模型,仿真结果表明整个系统简单可行,镍氢电池端电压变化率小,验证了充电优化控制策略的有效性,可提高镍氢电池充电效率和使用寿命,具有一定的工程应用价值。  相似文献   

7.
高田  景占荣  羊彦  王琪 《计算机仿真》2006,23(10):236-238,243
由于电池充电时充电电流与充电时间的非线性,采用PID、PI等传统的控制方法对充电过程进行控制的效果不佳,该文在研究镍镉、镍氢电池充电特性的基础上,提出了利用模糊控制技术对充电过程进行智能控制的方法。文中详细介绍了充电模糊控制器的设计过程,并以XC164单片机为控制核心,设计了一种针对镍镉、镍氢电池的智能充电系统,实验结果表明,该系统可对电池的复杂充电过程进行最优控制,充电快速、效率高,充电安全,不会损坏电池或缩短电池寿命,实现了充电过程的智能化控制。  相似文献   

8.
针对基于MAX713的镍氢电池充电器只能用于1~16节镍氢电池的充电、而且存在虚充满现象的问题,提出了一种可为16节以上镍氢电源充电的智能镍氢电池充电器的设计方案。该充电器以MAX713为基础,采用级联方式连接电池,并增加了定时检测功能,该功能通过单片机控制继电器来确保镍氢电池完全充满。实际应用表明,该充电器具有一定的实用性。  相似文献   

9.
介绍了目前常用充电终止控制方法的优缺点,以马斯定律和镍镉、镍氢电池充电特性为基础,使用模糊控制技术对快速充电过程进行智能控制。以XC164CM单片机为控制核心,设计了一种针对镍镉、镍氢电池的数字化智能充电系统。实验结果表明,充电电流较好的跟随了马斯定律给出的可接受的最佳充电曲线,从而提高了充电效率并且有效的防止了电池过充电,实现了高效、快速、安全充电。  相似文献   

10.
镍氢电池是镍镉电池的后代产品,各方面性能都优于镍镉电池。镍氢电池采用镍氧化物作为正极,储氢金属作为负极,碱液(主要为氢氧化钾)作为电解液。额定电压为1.2V,满充电时的最大电压可达1.6V~1.8V。正常放电终止电压为1.0V,实际上可使用到0.9V。重复充电次数大于500次,自放电率20%/月。镍氢电池的最大放电电流可达3C(放电率C是指一小时放完全部容量的电流值,如500mAh电池的C为500mA)。能量重量比60~80Wh/kg,能量体积比远高于镍镉电池,其单节5号电池的最大容量可达2300mAh,为镍镉电池的近四倍多。镍氢  相似文献   

11.
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.  相似文献   

12.
European Community policy and the market   总被引:1,自引:0,他引:1  
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.  相似文献   

13.
融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。  相似文献   

14.
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.  相似文献   

15.
This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.  相似文献   

16.
Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008  相似文献   

17.
《计算机科学》2007,34(4):148-148
Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.  相似文献   

18.
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.  相似文献   

19.
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.  相似文献   

20.
正The 34th Chinese Control Conference and SICE Annual Conference 2015(CCCSICE2015)is organized by the Technical Committee on Control Theory(TCCT)of Chinese Association of Automation(CAA)and the Society of Instrument and Control Engineers(SICE)of Japan,and locally organized by Hangzhou Dianzi University(HDU).  相似文献   

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