共查询到19条相似文献，搜索用时 671 毫秒
1.
本文根据重庆市地震局综合防雷改造项目的实践经验,设计适用于地震台站的防雷效能评估标准。该标准收集了重庆市21个防雷改造台站的基础资料,并对改造前后台站的观测系统运行状态、防雷关键参数、雷击情况、运维记录等数据进行分析。通过不断优化评估模型,最终利用约束条件最小二乘法获得了一套较为准确的评估公式,以正确评价台站的防雷效果与成效。该标准是对地震行业标准《DB/T 68-2017:地震台站综合防雷》在重庆地区的落实和执行,同时也是地震标准化、信息化在台站防雷方面的一次探索和尝试。标准的制定和实施还可为同类省级地震台网的防雷工作提供一套可参考的操作标准和应用实例。 相似文献
2.
3.
4.
5.
6.
在详细分析雷电灾害特征的基础上,阐述了防雷工作的主要技术手段。并针对地震台站的构成特点,研究了台站综合防雷系统的设计方法和技术措施。同时,以余山地震台为例,具体说明了防雷措施的应用方法及应用效果。 相似文献
7.
8.
9.
10.
11.
镜泊湖火山台网位于崇山峻岭之中,经常遭到强雷电袭击。为了使台网设备稳定高效运转,减轻雷电地干扰,我们对台网的防雷设施进行了建设,取得了非常好的防雷效果。 相似文献
12.
雷电灾害主要发生在天线、电源线、控制线等外部部位,以及通过相关线路和机壳感应进入设备内部。常见故障为损坏天线、架空明线及设备元器件。随着电脑及通讯设备在地震台站的广泛应用,雷电造成的危害越来越严重。采用合理的预防措施可以防止灾害发生或减轻灾害损失。 相似文献
13.
14.
邹振轩 《地震地磁观测与研究》2005,26(1):106-110
作者在地震观测台站建设的实践基础上,提供一套完整而易于操作的防雷设计和运行解决方法来保护地震观测系统,使通信线路、设备正常运行。 相似文献
15.
16.
上海测震、地球物理台站运行中,因电源系统和雷电而导致的故障占了较大比例。为提升台站运行质量而研发的隔离电源系统,可有效地将市电与台站设备间进行物理隔离,杜绝了雷击通过交流电供电途径的串入。该系统研制成功后,在上海测震台站试运行,其间发现了系统的一些缺陷,技术人员进行多次改进,提升了系统的整体性能。该系统已在多个测震、地球物理台站应用,取得了显著的防雷、防浪涌效果。 相似文献
17.
Short-term fluctuations superimposed on the diurnal variations of surface ozone recorded at Poona during 1969–1970 are discussed.While there is a net production of ozone during electrical discharges in a thunder cloud, the surface ozone recorder often registered a decrease in surface ozone concentration. This decrease coincided with updraughts generated during the formation of a thunderstorm. Similar sharp increases in ozone were observed with downdraughts. In cases of lightning without the development of a thunderstorm over the station, an increase in ozone density was observed just after the first lightning discharge.Apart from the fluctuations associated with thunderstorms in summer, sharp fluctuations in density were also noticed during winter, in the mornings. Abrupt falls in ozone occur with the formation of a stable layer near the ground at night and a sudden surge after the breaking up of the layers in the morning. The changes in ozone are, however, much more pronounced than those in temperature and wind and this striking correlation between surface ozone, surface air temperature and wind provides a unique tool for the study of low-level temperature inversions, their establishment and destruction. 相似文献
18.
地震观测仪器防雷击是保证仪器正常工作的首要难题之一。目前,虽然很多台站对仪器做了多级保护的防雷工作,但未起到提前有效的防护作用。本文介绍的"鹰眼"雷电预警系统主要实时监视一定尺度空间的电场值和雷电波,当系统监测值达到设定的预警条件参数,则自动报警,可提前切断仪器与外界的连接,有效预防雷击。 相似文献
19.
I. M. Vasilyev Yu. P. Kozhevnikov S. A. Matsiyevskiy V. G. Mezhberg A. V. Rykov I. V. Ulomov 《Seismic Instruments》2009,45(1):60-68
This paper considers the possibilities for modernizing the KSESh broadband seismic station developed earlier at the IPE AS USSR. The goal of the modernization was to extend the frequency and dynamic ranges and to decrease nonlinear distortions. The ways and concrete methods for improving the mechanical construction and electronic components of the station are shown and the intermediate results are described. As preliminary estimates show, there is an opportunity to build devices with the velocimeter response up to 520–540 s periods on the basis of this pendulum. 相似文献