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本文将LabVIEW与基于32位ARM单片机的数据采集电路结合,研究实现了一种高精度、多功能的双频激电信号采集系统.激电信号被采集系统接收后,经信号调理进入模数转换电路转换为数字信号,由USB接口送入基于LabVIEW软件平台的上位机中.上位机对该信号进行滤波选频、幅值测量、频谱分析、幅频率计算等处理,得到目标参数,同时还具有绘图、保存、查看等功能.本文就双频激电信号采集进行了阻容网络模拟实验,先用公式计算出理论视幅频率值,然后搭建电路进行实测.实验结果表明,该采集系统对双频激电信号采集的视幅频率测量误差小、精度高,具有良好的测量效果. 相似文献
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基于单片机的地震台站远程监控 总被引:1,自引:1,他引:0
针对当前地震台站的特点,提出一种基于TCP/IP通信的远程监控系统,介绍该装置的设计与实现方法,给出系统构成图、主要硬件电路及程序代码.通过样机试制与反复试验,该系统可以完成对地震台站设备工作环境的监测并能远程对数采等设备实现断电和重启等操作,可以为地震专业设备的可靠运行和及时维护提供保障和依据. 相似文献
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电信传输地震台网计算机系统中除计算机的通用设备外,还有一些地震传输台网专用设备,如地震触发器、编码遥控设备、SZ—3回放定位装置、SC—60型光线示波器等。这些设备必须通过接口电路与计算机联接。而这些接口电路是由台网用户自己设计,因此在设计和联接时必须注意计算接口的有关约定,不然不仅会影响专用设备的可靠性,还会影响整个计算机系统的可靠性。本文就是以地震专用设备与电子计算机系统进行联接时应解决的问题为例进行简要地讨论,也提出了一些具体方法,可供台网联调时参考。 相似文献
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无人职守地震台站远程监控系统的设计与实现 总被引:4,自引:0,他引:4
针对目前无人值守台站增加、台站系统运行维护存在的不足等现状,设计了一种基于传感技术及嵌入式技术的地震台站远程监控系统,以单片机为主控制器,实现对台站设备运行状态、UPS电源情况的检测;接收监控中心的指令,同时将检测到的异常信息及时上传至监控中心。与目前的技术系统相比,地震台站远程监控系统能实时自动判断出台站故障点位置,并通过短信、声音等形式进行报警,提升了故障排查效率。实际运行结果表明该系统运行可靠,有效提高了数字地震台网的工作效率。 相似文献
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M. N. French R. L. Bras W. F. Krajewski 《Stochastic Environmental Research and Risk Assessment (SERRA)》1992,6(1):27-45
A procedure for short-term rainfall forecasting in real-time is developed and a study of the role of sampling on forecast ability is conducted. Ground level rainfall fields are forecasted using a stochastic space-time rainfall model in state-space form. Updating of the rainfall field in real-time is accomplished using a distributed parameter Kalman filter to optimally combine measurement information and forecast model estimates. The influence of sampling density on forecast accuracy is evaluated using a series of a simulated rainfall events generated with the same stochastic rainfall model. Sampling was conducted at five different network spatial densities. The results quantify the influence of sampling network density on real-time rainfall field forecasting. Statistical analyses of the rainfall field residuals illustrate improvement in one hour lead time forecasts at higher measurement densities. 相似文献
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《地震工程与工程振动(英文版)》2014,(4)
正This journal is established by the Institute of Engineering Mechanics(IEM),China Earthquake Administration,to promote scientific exchange between Chinese and foreign scientists and engineers so as to improve the theory and practice of earthquake hazards mitigation,preparedness,and recovery.To accomplish this purpose,the journal aims to attract a balanced number of papers between Chinese and 相似文献
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George W. Housner 《地震工程与工程振动(英文版)》2008,7(2):I0001-I0001
Destructive earthquakes have caused great damage in China and the United States and collapsing buildings havecaused many deaths and injuries. The field of earthquake engineering studies earthquake hazards, the occurrence ofearthquakes of various magnitudes, the nature of the ground shaking during an earthquake, the vibration of structuresduring earthquakes, the strengthening of existing structures and the design of new structures to be earthquake resistant,and finally, how to cope with earthquake damage and restore a city to normal functioning. Such efforts are in progressin both countries, but unfortunately, the language barrier interferes with the free flow of information between China andthe Untied States. It would be mutually beneficial if some means could be developed to promote the exchangeof information across the Pacific Ocean. This new journal has been established for this purpose and its success willbe an important step in promoting earthquake engineering in China and the United States. 相似文献
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《国际泥沙研究》2014,(4)
正President:Giampaolo Di Silvio,Italy Vice Presidents:Ulrich C.E.Zanke,Germany Zhao-yin Wang,China The World Association for Sedimentation and Erosion Research(WASER),inaugurated on Oct.19,2004,is an independent non-governmental,non-profit organization.The mission of WASER is to promote international co-operation on the study 相似文献
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JianCheng Shi 《中国科学:地球科学(英文版)》2014,57(10):2281-2282
正Global Change includes climate change and other environmental changes caused by the joint interaction among various layers of Earth. From the positive side, global change provides new opportunities to human and other living forms on Earth. In the meantime, it creates tremendous challenges and negative impact. At present, the negative impacts have reached all primary processes of the global ecosystem and every aspect of human society, especially causing degradation of the ecosystem. For instance, intensive deforestation causes decline of biodiversity; global warming causes sea level rise and increases 相似文献