共查询到17条相似文献,搜索用时 187 毫秒
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本文随着GPS系统的完善、接收机性能和解算软件的不断改进,目前GPS可用于精密变形监测,且将逐步取代常规的测量方法。在我国许多大坝变形观测中都运用到GPS。本文对GPS一机多天线系统在大坝变形监测中的应用作简要阐述。 相似文献
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《Planning》2014,(1)
文章介绍了TD-SCDMA网络中GPS天线系统安装时的注意事项。在日常的TD站点GPS类维护工作中出现的故障有很多种,如星卡天线故障告警,时钟参考源异常告警,系统时钟失锁告警,星卡维护链路异常告警,星卡时钟输出异常告警,GPS状态告警,时钟源状态或锁相环告警等,文章对这些常见故障告警产生的原因进行分析,并提出了故障告警的解决方法。 相似文献
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介绍了现代大跨度桥梁健康监测的意义,分析了用GPS进行桥梁位移监测的可行性,并构建了利用全球定位卫星实时载波相位差分(GPS RTK)技术的桥梁三维位移长期实时自动监测系统,讲述了系统的基本原理与核心技术,简单介绍了系统的主要框架与构成。最后对GPS做桥梁监测的技术作出了展望。 相似文献
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GPS技术在滑坡监测中的应用 总被引:1,自引:1,他引:0
主要介绍了GPS技术在滑坡监测的应用中关于监测网的技术设计、监测网的外业观测、观测数据的预处理、观测质量的外业检核以及平差处理等内容,并通过实例介绍了GPS变形监测的整个过程,以进一步推广GPS在滑坡监测中的应用。 相似文献
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随着社会经济和科学技术的快速发展,利用传统的变形监测手段越来越不能满足变形监测要求。为了更有效保障国家财产及人身安全,迫切需要性能更可靠的设备来监测形变。目前,随着GPS技术的不断成熟,GPS自动化监测系统已经在桥梁、建筑、地震等行业中应用并取得很好的效益。本文介绍如何通过GPS技术运用,实现组建广东清远水利枢纽的GPS自动化监测系统。 相似文献
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《Planning》2019,(20):3-5
文章介绍了一款应用于GPS L1频段的低噪声放大器,使用Infineon公司的BFP420射频晶体管。利用ADS软件介绍了射频低噪声放大器的设计步骤和指标,成功制作出实物,并利用网络分析仪和噪声分析仪等设备验证了放大器性能。此放大器与陶瓷天线结合,并接入到GPS接收器,于空旷地带测量了其接收GPS卫星信号的性能。 相似文献
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Abstract: The present article reports the development of an accurate positioning system based on GPS technology. This system employs an inexpensive L1 GPS receiver and a small patch antenna. As these devices are very inexpensive and small, they can be attached to an array of sensor nodes of a wireless network sensing system. In the present study, we first develop a program that can be used to estimate the relative positions of receivers and evaluate its performance. Next, a number of experiments were conducted to assess the performance of the inexpensive L1 GPS receiver with a patch antenna. Compared to the results obtained using a sophisticated antenna, the present measurement system, which uses a patch antenna, is less accurate. However, the present system achieves an accuracy of 1–2 cm. This system can be used as a localization system for the sensor nodes or, because of its accuracy, as a displacement monitoring system. 相似文献
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H. S. Park & H. M. Lee Hojjat Adeli I. Lee 《Computer-Aided Civil and Infrastructure Engineering》2007,22(1):19-30
Abstract: A new approach is presented for health monitoring of structures using terrestrial laser scanning (TLS). Three-dimensional (3D) coordinates of a target structure acquired using TLS can have maximum errors of about 10 mm, which is insufficient for the purpose of health monitoring of structures. A displacement measurement model is presented to improve the accuracy of the measurement. The model is tested experimentally on a simply supported steel beam. Measurements were made using three different techniques: (1) linear variable displacement transducers (LVDTs), (2) electric strain gages, and (3) a long gage fiber optic sensor. The maximum deflections estimated by the TLS model are less than 1 mm and within 1.6% of those measured directly by LVDT. Although GPS methods allow measurement of displacements only at the GPS receiver antenna location, the proposed TLS method allows measurement of the entire building's or bridge's deformed shape, and thus a realistic solution for monitoring structures at both structure and member level. Furthermore, it can be used to create a 3D finite element model of a structural member or the entire structure at any instance of time automatically. Through periodic measurements of deformations of a structure or a structural member and performing inverse structural analyses with the measured 3D displacements, the health of the structure can be monitored continuously. 相似文献
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GPS-RTK技术及其在露天矿边坡位移监测中的应用 总被引:3,自引:0,他引:3
高陡边坡的稳定性一直是露天矿开采中倍受关注的重要安全问题之一。露天矿高陡边坡在发生跨塌破坏前,会有一个缓慢的位移过程发生。因此,通过对高陡边坡微小位移的监测可以实现对其发生灾难性跨塌的预测。本文讨论了露天矿边坡位移传统监测方法的缺陷及新型的基于GPS的自动监测技术所具有的独特优势,介绍了适用于露天矿边坡位移监测的高精度的GPS技术—RTK技术,阐明了基于GPS-RTK的露天矿边坡位移自动监测系统、边坡安全预警准则及监测实施的基本原则。旨在为相关研究与应用提供有益的借鉴。 相似文献