共查询到18条相似文献，搜索用时 140 毫秒
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为适应中国地震局"十五"前兆仪器总体设计的要求,对TJ-2体积式应变仪实现网络化功能进行了开发.本文介绍了网络化仪器的硬件设计、采用的操作系统和功能软件,并介绍了在TJ-2体积式应变仪仪器上的具体应用. 相似文献
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新型数字强震仪关键技术分析 总被引：1，自引：0，他引：1
新型强震仪采用高速信号处理器为控制核心,24位∑- △A/D转换器与数字滤波器构成的3通道信号采集系统.仪器采用大容量CF卡记录采集数据,具有TCP/IP协议的网络通信接口,内置GSM通信模块,内置嵌入式网页服务器,可以通过浏览器与发送中文短信的方式对仪器进行监控.详细分析了仪器所采用的烈度算法与触发滤波器的特性和设计... 相似文献
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利用轴对称线弹性模型有限元方法,计算了洞室中温度微小年变化引起的地倾斜和地应变. 结果表明,在满足地震台站建设规范的情况下(洞室内温度年变化幅度应小于等于0.5℃）,当洞室中温度年变化幅度仅为0.2℃时,仍会引起量级为10-7 rad的地倾斜和10-7的地应变,并且在洞室的尽头和拐弯处由于热汇聚和热扩散的作用引起地倾斜和地应变的变化更为突出. 因此今后在观测中,有必要进一步减小洞室内温度年变化;在台站设计建设和仪器布设中,对基线式仪器和摆式仪器都可以做一些恰当考虑,以尽量压制温度年变化带来的影响. 相似文献
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Further development of earthquake equipments is closely associated with that of computer technology. Because Embedded PC104 module has the equivalent functions of PC,it has been widely used in recent years,and can provide a new and flexible hardware design environment,but its applications in observation instruments of earth-quake precursor are rare. The present paper introduces in detail the realization of a networked geo-electrical meter by applying the low price,high reliability embedded PC104 industrial computer. 相似文献
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Mohsin R. Khan 《地震工程与结构动力学》1987,15(8):985-992
A method to generate artificial time-histories from given floor response spectra is presented in this paper. The original method proposed by Levy and Wilkinson1 is modified. New iterative equations are developed, based on extensive computational experimentation, to speed up and stabilize the convergence process. The present approach, when applied to spectra with peaks in the high frequency range (40 to 100 Hz) along with seismic peaks, converges very closely to the target spectra within eight iterations regardless of damping values. The original computer program for synthetic time-history generation was developed on the UNIVAC 1100 series computer. This program was converted to work on the IBM PC. The PC based program ‘MICRO-SEIM’ saves the response spectra generated at each iteration and the final synthetic time-history on the PC diskette. The post processing program reads those saved data from the diskette and plots the spectra and time-history. 相似文献
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本文介绍一种采用大功率稳流发射、低噪声测量、宽频带接收以及分布式同步等技术,自主研制的分布式多功能电磁法仪器系统.系统包括大功率电磁法发射机、分布式电磁法接收机、磁场传感器、整流源等设备.采用ARM芯片和FPGA芯片进行发射机的整机控制和信号整形发射,采用PC104工控机和FPGA芯片进行接收机的整机控制和信号处理.在人工场源模式下实现了可控源音频大地电磁法（CSAMT）、谱激电法（SIP）和时域激电法（TDIP）等测量功能;在天然场源模式下实现了大地电磁法（MT）、音频大地电磁法（AMT）的测量功能.发射机在满功率发射的情况下连续可靠运行时间大于12 h,接收机的动态范围大于120 dB,接收机可接收信号频率范围是0.001 Hz~32 kHz.通过典型矿区的野外实验和应用,表明本系统的性能总体上达到了国际先进水平. 相似文献
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Aly I. El-Kadi 《Ground water》1986,24(5):663-667
Abstract. This paper presents a computer program for generating two-dimensional fields of autocorrelated parameters. The program is written for parameters which are log-normally distributed such as hydraulic conductivity of aquifers. A specific form for the autocorrelation structure is included. Generating a parameter field represents an important step in the stochastic analysis of ground-water flow and mass transport via the Monte-Carlo technique. The program is written in FORTRAN for both the IBM PC and the VAX 11/780 and runs interactively to allow easy use. The program listing as run on the IBM PC is included. 相似文献
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Technique development of PC104 embedded module and its application in the geophysical instrument design 总被引：1，自引：0，他引：1
Introduction Electronic technique has been developing to so large scale integrated and high intelligent that the microprocessor has been the core in the electronic equipment or in the process control system design relying on its strong controlling and computing power, convenience to be application designed and to be programmed. Now the mainstream solutions widely used in the geophysical appliance are the single chip microprocessor (MCS), the digital signal processor (DSP), the common compute… 相似文献
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三维地震动场数值模拟并行计算系统 总被引：11，自引：3，他引：8
并行计算系统是进行三维复杂场地地震动场数值模拟的基础。本文作者利用10台微机构建了一套并行计算集群(常称为Beowulf系统),节点微机上运行Windows2000操作系统,采用MPI标准的MPICH1．2．4版本作为并行计算的支撑环境,并以100M bps高速交换式以太网作为互连网络。利用编制的并行计算程序对该并行计算系统性能进行了测试。结果表明：该系统能够达到非常高的并行加速比和并行效率。该系统将用于三维地震动场数值模拟研究。 相似文献