共查询到20条相似文献，搜索用时 62 毫秒
1.
2.
3.
根据雅安芦山7.0级强烈地震灾情上报的实际情况,总结了灾情采集PDA及灾情汇集处理接收系统在地震应急期间发挥的作用,由于灾情采集PDA通信方式是通过电信的CDMA数据业务网络上报的,在四川局部地区如甘孜藏族自治州、凉山彝族自治州等地网络业务覆盖率相对较低的情况下,当一个破坏性地震发生以后,造成数据通信的困难,尤其是在大震后地震灾区部分通信遭到破坏时,使得灾情采集PDA采集的灾情信息很难正常上报。若能够将灾情采集PDA通信方式升级为基于卫星与地面通信相结合的方式,就能弥补大震后地面通信遭到破坏影响后PDA上报的不足。 相似文献
4.
5.
6.
利用呼图壁地震台洞体场地水准二期的比对观测数据、呼图壁场地跨断层水准四期的同时间段观测资料以及1987~2012年大丰跨断层测线的水准观测数据,分析了呼图壁红山地震台洞体场地水准观测成果的变化速率与跨断层水准观测成果的年变速率的差异性,判定原地震台使用的Ni004光学水准仪的可靠性,依据分析结果提出合理建议。并根据大丰跨断层水准观测的历史观测成果和呼图壁洞体场地水准观测比对后的分析结果,初步探索研究跨断层水准在研究区域的地形变特征。 相似文献
7.
8.
对山东高崖水准资料进行了详细的分析,认为１９９０年出现的大幅度西倾变化系其西侧水库荷载猛增而引起的。指出水准测值与水库库容量存在着一定关系,相关系数为０５６,水库容量的变化是引起水准测值变化的主要因素。 相似文献
9.
在熊岳点对设计的土中深层套管水准标石作了试验对比观测,初步结果是:此类标石的抗抽水干扰能力仍欠佳(可能与其离抽水井太近有关),抗地下水缓慢变化、降雨等干扰能力较强。讨论了水准标石的稳定性,认为短水准测点应埋设基岩标端点,有困难时可埋设与土中深层套管水准标石类似的标石。 相似文献
10.
11.
用有序度研究深井水位记震能力 总被引：1，自引：0，他引：1
深井水位记震能力可作为一种预报地震的前兆手段，应用系统科学中的序度Ｒ来源深井水位记震能力，其工作结果：（１）深井水位记震能力所组成的系统表现为有组织系统； 相似文献
12.
流磁测量作业中一般通过填写纸质记录表记录和检核观测数据,存在作业效率不高和不便数据存储、传输、存档和后续调用处理等问题。为此,在分析电子记录可行性的基础上,利用VS2008,在WM6平台开发流磁测量PDA记录软件。应用表明,该项工作对改进已有观测技术、优化数据管理方面,具有实践和借鉴意义。 相似文献
13.
数字地震仪的发展历史及展望 总被引：4，自引：4，他引：4
地震仪经历了光点，模拟和数字的变化，数字地震仪本身由16位发展到24位，其附属设备（电缆，检波器）也是到了不同程度的发展。近年来，I／O等公司利用MEMS技术研制了新型地震检波器，这一新的发展对于地震采集尤其是多分量采集带来重要影响。 相似文献
14.
E. P. Zolotukhin D. B. Korolenko A. S. Romankov L. A. Korolenko 《Seismic Instruments》2018,54(4):417-423
Problems of software development for basic seismometric monitoring of the technical condition of buildings and structures are considered. A client–server architecture is chosen for the recording program of the system. The server component provides interconnection with the equipment, data acquisition, storage, and processing. The client component provides the user (operator) interface, hardware configuration and application, and representation of system tasks and results in user-friendly form. The seismic monitoring system operates in two modes: the main one includes the isolation and recording of seismic events with assessment of their impact on a structure using the MSK-64 scale; the advanced mode provides recording of microseismic vibrations according to the schedule (specified by the operator) for monitoring the technical condition of a structure. Moreover, the system continuously records oscillations of an object. Thus, the server program writes and stores three types of files: seismic events, monitoring, and continuous recording. When a seismic event is detected or system malfunctions arise, responsible personnel are notified by e-mail and SMS according to an approved list. All operator actions, as well as system functioning events, are fixed in the message log and system log. The client program provides visualization of data on oscillations at observation sites in the form of oscillation seismograms, current signal-amplitude spectra, and vibration-level histograms from the measurement channels for a selected component. All information important for the operator (display of sensors and their status, current configuration, seismograms of corresponding measurement channels, and a list of latest messages in the system) is presented in a mnemonic diagram, which is one of the main working windows of the application. The main specific features of the program are support of different types of equipment (seismic stations), independence from the number of connected seismic stations/recorders, wide possibilities in configuring the system hardware and the application itself, the possibility of unlimited user (client) connections for browsing seismometric data, and multilanguage support. 相似文献
15.
16.
W. F. DONNELL 《Geophysical Prospecting》1967,15(2):246-261
The use of digital recorders and computers in seismic exploration promises major enhancement of the quality of final documents available to interpreters. The ultimate objectives of recording and processing remain what they always have been: 1 Record the reflection wavelet as a function of time; this requirement has been met with satisfactory accuracy for a number of years. 2. Record the reflection wavelets with sufficient fidelity to permit the interpreter to recognize them. Various factors affect our ability to achieve this second objective. Certain recording errors are associated with digital recording systems. However, an understanding of the sources of error will enable the operator to use his system properly and to estimate the noise level or inaccuracy of field recordings. Field operations do not require rigorous error analysis; in most cases a satisfactory approximation can be obtained from simple calculations. Three types of “noise”–seismic, instrument and power line–introduce errors. Factors which contribute to over-al recording system error include specifically input noise, power supply ripple, crosstalk, A-D conversion error, quantizing noise, aliasing, distortion. Examination of each component of a recording system, permits the determination of its ultimate effect on the over-all noise level–or error level–of the entire system. Many of the error sources produce statistically independent noise which is not correlative. Where this is true, error voltages from various sources may be combined by taking the square root of the sum of the mean square noise voltages, giving a result slightly greater than the largest single voltage if one source is much greater than any other source. This simplification can be used to estimate over-all system noise levels. Distortion and crosstalk depend on signal amplitude and should be added algebraically in each category. Each final sum should be used as a statistically independent noise source with respect to other system noise sources. Using the foregoing examples and simplified system for estimating over-all system noise, and assuming that much of the distortion (which limits signal/instrument noise ratio to 54 db) can be removed by filtering, we determine that the combined effect of all sources of error is to reduce the system S/N ratio to approximately 74 db. With proper care digital field recording systems can produce very good field records, and exotic computer processes can enhance signal and reduce various forms of noise. However, one always must recall that the level of confidence which one can place in an interpretation of seismic data must be dependent on a knowledge of the accuracy of the basic data. 相似文献
17.
本文利用标定信号的数字记录和模拟记录，参考已有的模拟记录的幅频特性，计算求得了成都遥测台网（ＣＴＳＮ）数字记录系统的仪器响应，其幅频特性曲线的形态与模拟记录的大致相同，而高于１０Ｈｚ时，随机干扰成分较大，因此处理这套系统的数据时，应尽量选取低于１０Ｈｚ的信号。 相似文献
18.
V. N. Chebrov D. V. Droznin Yu. A. Kugaenko V. I. Levina S. L. Senyukov V. A. Sergeev Yu. V. Shevchenko V. V. Yashchuk 《Journal of Volcanology and Seismology》2013,7(1):16-36
This paper presents the main results from the development of the detailed seismological observation system in Kamchatka and the information on the system as of 2011. We describe the networks of seismological stations, the systems for the acquisition, storage, and processing of seismological observations and their technical, methodological, and software support. We discuss the basic characteristics of the recording channels and the system as a whole. We present the information resources of the Kamchatka seismological data bank that provide for basic research in earth sciences. In 2011, the system of seismological observation in Kamchatka was a specialized network for acquisition (recording), storage, transmission, and processing of seismic and geophysical data that provides support for the effective monitoring of seismic and volcanic activities, as well as tsunami warning. 相似文献
19.
美国ＴｅｒｒａＴｅｃｈｎｏｌｏｇｙ公司生产的ＤＣＳ－３０２数字地震仪原来配用ＳＳＡ－３０２力平衡加速度计，用于观测地震的近场地面运动加速度。本文设计了一套装在地震计与记录器之间的前置放大器，使ＤＣＳ－３０２记录器可与英国制造的ＷｉｌｌｍｏｒｅＭＫ３型动磁式地震计配用，既能记录近震，又能记录远震，扩大了ＤＣＳ－３０２数字地震仪的使用范围。文中给出了记录实例。 相似文献
20.
介绍一种可以携整体更换的水平摆倾斜仪的石英系统，便于台站对损坏的ＳＱ、ＳＳＱ型倾斜仪摆系的修复。此外，还介绍了摆的悬挂点和摆的初始平衡位置对仪器稳定性的作用。 相似文献