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煤矿中的瓦斯浓度问题,是关系到矿井生产和劳动者生命安全的重大问题.本文根据矿井瓦斯浓度监测的实际需要,设计出一种基本MircoChip公司PIC16F877单片机的智能型矿井瓦斯传感器,包括实时监测和显示瓦斯气体浓度、超浓度声光报警、红外遥控调整系统参数、浓度信息实时上传等功能,具有低能耗、高可靠性、使用方便、可联网等特点,为矿井的瓦斯浓度监测提出了一种高效可靠的解决方案.经过试用,取得了良好的实际效益. 相似文献
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瓦斯排放是高瓦斯矿井瓦斯超限后所必须采取的有效措施。文章在分析传统排放方法所存在的缺陷的基础上,设计了一种基于变频调速技术的闭环型瓦斯排放系统,并介绍了其基本构成和工作原理。该系统以排放出的瓦斯浓度为参量,通过PID算法调节局部通风机转速,实现了掘进工作面瓦斯的安全排放,保证了煤矿井下的生产安全。 相似文献
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基于蒙特卡洛方法的瓦斯测值分析模型 总被引:1,自引:1,他引:0
针对矿井瓦斯检测系统无法获得所有巷道瓦斯数据、所得瓦斯数据具有一定非客观性以及瓦斯历史数据无法得到充分分析和利用的问题,文章提出了一种基于蒙特卡洛方法的瓦斯测值分析模型。该模型依据矿井通风网络的拓扑结构,生成各巷道瓦斯测点的上游区域,并通过分析各测点上游区域的瓦斯流入测点的历史检测数据,计算出每条巷道的瓦斯涌出历史规律,然后采用蒙特卡罗方法对其进行大样本的随机取样,得到全矿井瓦斯涌出客观规律,并在此基础上采用全系统流量平衡算法,得到全矿井瓦斯浓度统计规律。该模型在瓦斯数据处理方面首次提供了一种根据已知的历史数据生成未知"准历史数据"的方法。实际应用表明,利用该模型对矿井瓦斯历史数据进行分析,可得到无测点巷道的瓦斯"准历史数据",且所得的瓦斯涌出规律和瓦斯浓度规律比历史数据更具有客观性。 相似文献
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基于多传感器数据融合技术的瓦斯监测系统 总被引:5,自引:2,他引:5
瓦斯灾害是煤矿中最严重的灾害之一。最近几年瓦斯事故发生频繁,瓦斯爆炸夺走了许多矿井工人的生命,给国家造成了重大经济损失。对矿井瓦斯预测预报和对瓦斯进行控制,就能大大地减少瓦斯爆炸事故和矿工的伤亡。为此采用多传感器数据融合方法,对瓦斯、温度、风速等信号数据采样,提取它们特征量,对数据进行数据融合,实现对矿井瓦斯进行实时监测、预测控制,为矿井安全生产提供了有力的保障。并经过实验已取得较好的效果。 相似文献
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煤矿自动化与信息化技术回顾与展望 总被引:13,自引:7,他引:6
目前,煤炭在我国能源生产结构中的占比为74.29%,在我国能源消费结构中的占比为71.26%,又是廉价、供应可靠、可洁净利用的能源,它与石油、天然气相比储产比最大,而核电、水电、风电等能源规模又无法与其相比,因此,煤炭仍将是我国的主要能源。"十一五"期间,煤矿安全监控、煤矿井下人员位置监测、煤炭产量远程监测、全矿井移动通信、无人值守远程监控技术及系统取得了突破和快速发展,在煤矿安全生产工作中发挥着重要作用。今后还需进一步加强传感器无盲区布置方法,基于煤矿安全监控系统的瓦斯、火灾、冲击地压等煤矿重大灾害预警技术,无人工作面遥控技术,本质安全无线通信与光纤通信技术,煤矿井下人员精确定位技术,煤矿井下生命探测技术,基于3D GIS的煤矿安全生产管理信息系统等的研究。 相似文献
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S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
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
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European Community policy and the market 总被引:1,自引:0,他引:1
C. Lloyd 《Journal of Computer Assisted Learning》1993,9(2):86-91
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
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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
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张涛 《计算机测量与控制》2015,23(1):86-89
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
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Wayne O’Brien Author Vitae 《Journal of Systems and Software》2008,81(11):1997-2013
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
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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
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潘丽 《自动化与仪器仪表》2014,(7):80-82
自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。 相似文献
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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
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Jacob Palme 《Software》1979,9(9):741-747
The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users. 相似文献