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地震台网基于网络的无人值守 总被引：1，自引：1，他引：0
《地震地磁观测与研究》2015,(6)
网络远程控制终端配合视频,实现无人值守设备的集中监控,有效降低维护成本,提高工作效率,以提高地震观测数据连续性,保障观测资料质量,确保地震观测数据连续性及资料质量。 相似文献
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针对无人值守地震台因供电故障造成的观测数据质量问题,现阶段GPRS在地震台站的应用大多以手机短信呈现,无良好的可视化操作界面,设计开发一种底层基于STM32单片机,以GPRS为数据传输方式,Android手机APP为监控界面的智能电源控制系统。通过在河北省地震局石家庄中心台下属的深州郭家庄地震台进行应用,证明该电源控制系统能够保证观测设备的稳定运行,并为设备维护提供了保障和依据。 相似文献
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《地震工程学报》2018,(Z1)
针对无人值守地震台站特点,通过传感技术和嵌入式技术,采用低功耗、功能强大的单片机微处理器以及稳定、安全、嵌入式的GPRS/GSM模块等设备进行开发,实现无人值守台站的的环境监控以及远程控制。当无人值守站点交流电中断或SDH链路异常时,该监控系统均能第一时间报警并短消息提醒设备维护人员,很好应对人为对台站环境以及地震设备的影响;同时系统也能响应客户端指令完成数采等设备的断电和重启以及设备工作环境的监测,当工作环境监测到火情、盗情及温、湿度出现异常时,系统会向客户端发送报警信息,这对提高无人值守站点的技术系统稳定性与数据产品的稳定、连续性都具有重要意义。 相似文献
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陈静 《地震地磁观测与研究》2018,39(6):201-207
为解决无人值守台站仪器维护难题,基于Java与PHP语言研发了无人值守台设备智能管控平台,平台实现了从状态监控、短信告警、故障智能诊断、自动故障排除到故障恢复后归档的全生命周期维护流程,同时辅以远程视频监控,建立起一套智能高效且自动化的无人值守台仪器运维机制。系统有助于故障的及时发现与自动排除,大大减少仪器运维带来的人力物力资源消耗,提高观测资料的连续性和观测质量。自系统试运行以来,设备连通率获得大幅度提高,显现出较高应用价值。 相似文献
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针对无人值守地震台站逐年增加,运行维护模式不佳的现状,设计一种远程电源监控系统,采用远程电源控制模块,设计软件通过TCP/IP协议,在仪器出现死机时,远程实现设备的断电重启。本文对该系统的设计思路、硬件构成进行描述,并简要介绍软件功能设计、监控告警以及该系统在无人值守台站的应用。实践证明,该系统可有效解决因仪器死机造成的观测数据缺记,为地震专业设备的可靠运行和及时维护提供依据与保障,为今后地震台站,特别是无人值守台站的维护提供借鉴。 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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Gtz Schroth Luciana Ferreira Da Silva Marc‐Andree Wolf Wenceslau Geraldes Teixeira Wolfgang Zech 《水文研究》1999,13(10):1423-1436
The partitioning of rain water into throughfall, stemflow and interception loss when passing through plant canopies depends on properties of the respective plant species, such as leaf area and branch angles. In heterogeneous vegetation, such as tropical forest or polycultural systems, the presence of different plant species may consequently result in a mosaic of situations with respect to quantity and quality of water inputs into the soil. As these processes influence not only the water availability for the plants, but also water infiltration and nutrient leaching, the understanding of plant effects on the repartitioning of rain water may help in the optimization of land use systems and management practices. We measured throughfall and stemflow in a perennial polyculture (multi‐strata agroforestry), monocultures of peach palm (Bactris gasipaes) for fruit and for palmito, a monoculture of cupuaçu (Theobroma grandiflorum), spontaneous fallow and primary forest during one year in central Amazonia, Brazil. The effect on rain water partitioning was measured separately for four useful tree species in the polyculture and for two tree species in the primary forest. Throughfall at two stem distances, and stemflow, differed significantly between tree species, resulting in pronounced spatial patterns of water input into the soil in the polyculture system. For two tree species, peach palm for fruit (Bactris gasipaes) and Brazil nut trees (Bertholletia excelsa), the water input into the soil near the stem was significantly higher than the open‐area rainfall. This could lead to increased nutrient leaching when fertilizer is applied close to the stem of these trees. In the primary forest, such spatial patterns could also be detected, with significantly higher water input near a palm (Oenocarpus bacaba) than near a dicotyledonous tree species (Eschweilera sp.). Interception losses were 6·4% in the polyculture, 13·9 and 12·3% in the peach palm monocultures for fruit and for palmito, respectively, 0·5% in the cupuaçu monoculture and 3·1% in the fallow. With more than 20% of the open‐area rainfall, the highest stemflow contributions to the water input into the soil were measured in the palm monocultures and in the fallow. Copyright © 1999 John Wiley & Sons, Ltd. 相似文献
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M. A. Kahn 《洁净——土壤、空气、水》2000,28(2):95-101
Red tide, a recurrent phenomenon has become conspicuous in several Kashmir lake ecosystems since 1991. The responsible organism (Euglena pedunculata), a rare flagellate rediscovered in the Kashmir Himalaya (Khan 1993) caused first and unprecedented red tide outbreak, constituting a maximum of 96% of resident numerical phytoplankton density in Dal Lake. At present, conflicting hypotheses exist on the generation of causal assemblage(s) imparting redness to waters: Jeeji Bai (1991) linked its origin to acid precipitation – a fallout of burning oil‐fields during the Gulf War – whilst Khan (1993) holds local factor(s) responsible. Field/experimental studies support the latter contention that the influx of untreated sewage, in unison with warm temperatures, high levels of PhAR, iron and interruption to hydrological flow‐pattern together with absence/or reduction in grazing activity created conducive environmental milieu for red tide outbreak. Dal Lake “red tide” drifted the bloom‐inoculum to other waters, including Lake Wular, where additional ecological niches were carved out, threatening the aesthetic value and biological diversity of Kashmir lakes. Ecological monitoring indicates frequent seasonal red tide occurrence in Dal Lake (including summer‐autumn event of 1998) which testifies its unabated eutrophication status. Further studies are needed on ecological adaptability and biogeographic distribution of this rare and unique red tide‐causing flagellate. 相似文献
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