RG13型雨量传感器测量结果的不确定度评定          下载免费PDF全文

杨涛 《中低纬山地气象》2023,47(1):116-118

国内民航机场主要使用的雨量观测设备为芬兰维萨拉公司生产的RG13型雨量传感器,为保证雨量测量数据的真实可靠,对其测量结果的不确定度分析很有必要。根据自动气象站现场校准方法,分别进行大雨强和小雨强的重复测试,并依据JJF1059.1-2012测量不确定度的评定与表示要求,进行A类不确定度评定。分析测量过程中的B类不确定度来源,进行B类评定,最终给出扩展不确定度。结果表明：在小雨强下,测量不确定度为U95=0.17mm,包含因子k=2。在大雨强下,测量不确定度为U95=0.16mm,包含因子k=2。该研究完善了雨量传感器的现场校准工作流程,对雨量传感器测量结果的可信度评定具有参考价值。  相似文献   

A simple approach to define Holocene sequence stratigraphy using borehole and cone penetration test data     

Michael Styllas 《Sedimentology》2014,61(2):444-460

Cone penetration testing has been widely used since the 1950s for determining the subsurface geotechnical conditions of unconsolidated sediments. This paper highlights the potential value of cone penetration testing as an aid to define the stratigraphic structure of Holocene sedimentary deposits. By calibrating cone penetration test logs with adjacent borehole logs and by utilizing all the available information produced during geotechnical surveying, stratigraphic models that accurately describe the vertical and lateral boundaries, as well as the stacking pattern, of Late Quaternary systems can be constructed. The widespread application and technical simplicity of cone penetration testing, combined with simple data interpretation via correlation with adjacent borehole logs, yield a useful and inexpensive tool for sedimentological investigations. This methodology is illustrated using data from 36 cone penetration tests and 11 boreholes on the Holocene deltaic plain of the Aliakmon River, Greece. Sedimentological and stratigraphic information from core log correlations, the spatial distribution of cone penetration test parameters, sediment grain size and per cent concentration of organic matter are utilized. The results suggest, that in sequence stratigraphic terms, the delta is divided into a lowstand systems tract composed by fluvial gravels and sands (U0) of Late Pleistocene age, as well as from red oxidized clays, and a transgressive systems tract represented by fluvial channel sands (U1), overlain by a thin transgressive sand sheet of coastal origin (U2), characterized by fining upward trends. The highstand systems tract is constituted by a variety of stratigraphic units (U3 to U7) and depositional environments, characterized by coarsening upward sequences, representing both aggradational and progradational facies, and dominated by the presence of three prograding wedges. Detailed definition of the thickness, vertical boundaries and stacking pattern of the resolved stratigraphic units, presented as a two‐dimensional stratigraphic model, demonstrates the applicability of the proposed method.  相似文献   

河北雄县地热田钻井地温测量及地温场特征   总被引：6，自引：0，他引：6       下载免费PDF全文

李卫卫  饶松  唐晓音  姜光政  胡圣标  孔彦龙  庞菊梅  王建存 《地质科学》2014,(3):850-863

根据研究区22口井的实测井温资料及前人的研究成果,开展了雄县地区地温场分析,对雄县地热田地温场的特点取得了以下认识：雄县地热田的盖层以传导热传递方式为主,热储层中源于供暖期热水生产和回灌引起的地下水受迫对流的影响,以对流热传递为主,不同静井时间的重复测温结果显示,静井时间的长短和井内流体的运移方式（抽水或回灌）控制了井内温度的分布及井内温度的动态变化：静井时间增加则测得的温度在中性点上下呈反向变化,生产井和回灌井的测温曲线存在明显不同,雄县热田第四系底部的温度为32.8 ℃～48 ℃,容城凸起为28 ℃～35 ℃,雄县热田第三系底部温度为64.5 ℃～81.3 ℃,容城凸起为45 ℃～60 ℃。雄县地热田盖层内的地温梯度为43.9～72.2 ℃/km之间,平均为51 ℃/km,容城凸起的井地温梯度为31.4～41.1 ℃/km,平均为37.1 ℃/km。雄县地热田内盖层导热流值变化为80.61～113.86 mW/m² 的范围。  相似文献   

航磁调查中追踪隐伏磁性体的方法     

张鹏  王大勇  支海妮 《物探与化探》2014,(1):1-9

在航磁调查工作中,为了追踪隐伏断裂、隐伏岩体及隐伏矿体,尝试了应用方向导数、斜导数和插值切割法等方法。针对建立的理想模型进行对比分析,并在内蒙古某地进行实验,认为应用斜导数追踪隐伏断裂、隐伏岩体,参考插值切割法追踪隐伏磁铁矿体方法较好。  相似文献   

磁通门探头在瞬变电磁法勘探中的应用     

王兴春  张杰  郑学萍  邓晓红  武军杰  杨毅 《物探化探计算技术》2014,(6)

在某铜镍矿区通过开展磁通门探头结合瞬变电磁法勘探实验研究,与传统的感应电动势探头测量结果比较,结果表明,磁通门探头采集数据晚期道稳定,深部信息反应良好。理论计算结果也表明,相同条件下瞬变电磁法勘探中测量磁场更容易发现深部矿体信息,且具有较高的横向分辨率。  相似文献   

DS18B20温度传感器在地下盐湖遥测系统中的应用与改进          下载免费PDF全文

房毅卓  陈亮 《盐湖研究》2022,30(3):107-111

介绍了DS18B20温度传感器在地下盐湖遥测系统中实现远距离温度检测应用的关键编程、传感器铠装壳体的封装工艺2个方面的改进与实施方法,实现了DS18B20在地下盐湖遥测系统中卤水温度参数的长距离、低成本、高质量的数据采集。  相似文献   

The new accelerograph network for Santa Fe De Bogota, Colombia and implications for microzonation     

Anibal Ojeda  Samuel Martinez  Maria Bermudez  Kuvvet Atakan 《Soil Dynamics and Earthquake Engineering》2002,22(9-12):791-797

The new accelerographic network of Santa Fe de Bogotá is composed of 29 three-component stations with sensors at the surface and three additional six-component borehole stations with three sensors at the surface and three at depth (115, 126 and 184 m). In total, 32 stations have been operative in the metropolitan area of Bogotá since 1999. During this period of time, a significant number of weak motion are recorded and used for a preliminary analysis of local site effects. Using the SH-wave response spectra we verify the behavior of the different seismic zones proposed by the previous microzonation study of the city. A comparison between normalized SH-wave response spectra and the normalized design spectra for each zone clearly depicts that parts of the design spectra should be revised, as well as the boundaries between different zones may require some changes. The spectral amplification levels reach up to a factor of 5. The predominant periods obtained by the amplification spectra in different stations in the city, show variability from 0.3 to 3.0 s. A comparison is also made between the predominant periods obtained using H/V spectral ratios of microtremors and those using weak motion. In general, microtremors tend to predict slightly lower values of dominant periods than those calculated by the weak motion spectra. However, there is a general correlation between the two data sets. Using the data recorded by one of the borehole station, an equivalent linear seismic response analysis was conducted. The modeled and recorded response spectra show similarities in period peaks, however, the modeled soil amplification is underestimated for periods less than 0.8 s. Since the available record is weak motion which represents mostly the linear response of the soils, further analysis is required.  相似文献   

新型六维腕力传感器     

茅晨  宋爱国  马俊青 《南京气象学院学报》2011,(5):402-407

设计了一种新型六维腕力传感器.采用有限单元法对六维腕力传感器的十字梁弹性体进行结构静力学分析,论述了该机械结构的合理性,确定了应变片黏贴的最佳位置,通过合理的应变片电桥的组桥将各维力/力矩信号转化为电压输出.设计放大电路对六维电压信号进行放大,最后通过试验标定装置对此六维腕力传感器进行标定.  相似文献   

传感网支持下的洪涝事件过程监测与准实时服务方法及验证     

杜文英  陈能成  袁赛 《测绘学报》2020,49(2):191-201

洪涝过程探测与准实时服务对于保障人民生命和财产安全意义重大。通常洪涝探测仅关注洪涝断面/平均状态,缺乏对洪涝从发生、发展乃至最后结束的全过程的整体认知,且洪涝探测和服务被动滞后。本文制定洪涝过程探测规则,改进水位预测模型,并将其作为理论基础,与传感网信息模型和服务接口相结合,提出了洪涝过程动态探测与准实时服务(process-based flood detection and service,PFD&S)方法。以PFD&S方法为基础,设计并开发了PFD&S原型系统,该系统由传感器层、数据接入层、洪涝探测层和用户交互层4层组成,且具备传感器数据发布和洪涝事件订阅两种使用模式。文中以2016年夏季发生在黄汉流域的洪涝事件为例,对PFD&S方法的可行性和有效性进行验证。结果表明,PFD&S方法和系统能够精准判断洪涝事件所处阶段,并根据不同阶段的需求提供水位预测、洪涝预警或洪涝信息统计等服务,且方法具备准实时性和可扩展性特征。  相似文献   

基于激光跟踪仪的传感器坐标标定应用研究     

李亮亮  景冬  卢秀山  余志鹏  刘洪涛 《地理空间信息》2021,19(3):72-75

传感器空间位置标定是测量系统集成与安装的关键技术之一。根据激光跟踪仪的特点与优势,探讨了激光跟踪仪应用于移动测量多传感器坐标转换关系标定的可行性与适用性;重点探索了基于激光跟踪仪的传感器标定测量与数据处理方法,并分析了标定误差及其影响因素。针对船载多波束单体标定需求,基于Leica AT930型激光跟踪仪和经纬仪工业测量系统展开对比分析和标定对比实验,从而证明了采用接触测量为手段的激光跟踪仪能满足部分传感器标定任务需求,能极大提升便捷性与标定效率。  相似文献