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随着我国煤矿采掘机械化和电气化程度的提高,矿井火灾越来越成为煤矿的重大灾害之一。采用分布式光纤感温报警系统,能实时测量到井下巷道中铺设的光缆沿线长期工作的温度变化情况,一旦实时监测的温度与平时测量积累的温度经验值不同,系统就可做出合理判断。重点介绍系统构成及原理,系统监测软件和技术关键。该系统经现场实际应用,取得了较好的效果,它可对火灾进行预测和辅助处理,对井下事故发展情况进行掌控。 相似文献
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0 前言火灾报警系统 (FA)是楼宇自控系统 (BA)的一个分系统 ,服务于楼宇自控系统 ,共同完成对大楼的监控。在我国 ,由于宏观政策与行业管理的各种原因 ,消防系统总是作为一个需要独立于其他系统的系统对待 ,不强调参与到楼宇自控系统里来。这样 ,一方面 ,我国的消防自控系统产业取得了非常好的操作环境 ;另一方面 ,由于对系统以外的各个方面关心不够 ,或多或少地存在一定的封闭性 ,不利于消防电子产业更广泛地拓宽发展出路 ,不利于与楼宇自控系统及其他子系统紧密结合。从消防电子产业的发展考虑 ,增强与其他系统的联动能力是一个紧迫问… 相似文献
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谌寒梅 《冶金矿山设计与建设》1998,30(4):26-29
叙述了现代火灾自动报警系统的技术进展概况,对“传统型”与“现代型”火灾自动报警系统做了技术对比,详细论述了现代火灾自动报警系统的技术特征。 相似文献
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一种新颖的瓦斯监测报警系统 总被引:2,自引:0,他引:2
简介一种新颖的瓦斯监测报警系统的工作原理。它是以FDZB型风电沼气闭锁装置为基础,应用计算机技术改造而成。文章从总体上分析了它的设计特点并讨论了技术发展的可能性。 相似文献
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A kind of feed forward neural network with three layers was applied to detect conveyor belt fire faster. And backward propagation (BP) algorithm was used to train the network parameters. The appropriate parameters and architecture of network were obtained after training with 81 pair of data. Matlab was used to simulate and the experiment result shows training time is least and error reduces most rapidly when ten neurons were in hidden layer and momentum coefficient is equal to 0.95. Temperature, rate of temperature change, dense of carbon monoxide and rate of carbon monoxide dense change were considered as four parameters to detect the PVC belt fire in this paper. It is indicated that the network can give alarm as fire takes place about 350 s. The network can effectively detect the fire at the early stage of conveyor belt fire. At the same time,the reliability of alarm can be increased and the anti-interference capability can be enhanced when using this network. 相似文献
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人工神经网络中的BP网络可将一组样本的输入输出问题转变为非线性优化问题 ,一个零件是由若干种表面特征组成 ,每个特征的加工方法选择就是一个BP网络 ,多个BP子网络组合一起 ,共同决定最终的加工方法 相似文献
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Introduction A great number of goal optimization questions exist in such fields as electronic science, control sci-ence, computer science and management science. So-lution to these questions can be summed up as seeking the maximum or minimum value to a certain definite goal function with constraints. Effective algorithms have not been found for many questions. In solving problems the problems’ time complexity is exponen-tial, it is difficult to find an overall optimized solution in limited ti… 相似文献
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利用人工神经网络的非线性映射特性,以典型的煤样主要煤级指标做训练样本,对网络进行训练,对其中各煤化阶段的指标的权值和神经元内部的阈值沿误差下降的方向不断修正,最终达到了精度要求。该煤化阶段划分方法在实际工作中具有一定参考价值和指导意义。 相似文献
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Based on the nowadays' condition, it is urgent that the gas detection cable communication system must be replaced by the wireless communication systems. The wireless sensors distributed in the environment can achieve the intelligent gas monitoring system. Apply with multilayer data fuse to design working tactics, and import the artificial neural networks to analyze detecting result. The wireless sensors system communicates with the control center through the optical fiber cable. All the gas sensor nodes distributed in coal mine are combined into an intelligent, flexible structure wireless network system, forming coal mine gas monitoring system based on wireless sensor network. 相似文献
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构建人工冻土BP神经网络本构模型,利用冻土三轴实验数据对神经网络模型进行训练,并2次开发有限元本构程序。用BP神经网络本构模型能很好的反映人工冻土非线性,人工冻土三轴数值模拟值和实验值误差在2.43%范围内。通过深井冻结工程数值模拟表明:人工冻土BP神经网络本构模型能较好的描述复杂应力路径变形特征,数值结果和现场实测规律一致,且和实测位移误差在5.0%;应用BP神经网络冻土本构模型准确预测预报人工冻土帷幕应力场和变形场,为冻结工程设计与施工提供参考。 相似文献