建立精确的监控网络

这structures that accompany our everyday seem static and unalterable to our eyes. Weather conditions, aging, human activity, geological changes and other factors alter these structures and pose a challenge for engineers that strive to maintain the health of the constructions that our economies and daily lives depend on.

结构行为并不总是通过设计和模拟来预测。意外的桥梁故障不能仅仅阻止您到达工作或回家。缺乏适当的监控和维护也可能导致城市的总隔离，甚至导致丧生。因此，工程师需要在所有自然物理条件下准确，及时地检测任何结构运动。

为了了解任何结构的完整性和变化，当今的工程师拥有结构性健康监测（SHM）工具，以清楚地了解当前状态，任何结构的退化和演变，以做出快速的知情决定。

Led by UbiPOS UK as the prime contractor, consortium members including academics from the University of Nottingham’s Geospatial Institute and industrial partners from Leica Geosystems, GVL, Amey, Transport Scotland and China Railway, are developing GeoSHM (GNSS and observation for Structural Health Monitoring), a system to provide users with an integrated solution to monitor and assess in real time the operational conditions of different types of assets. Aware of the challenges to maintain the structural safety and operation of long span bridges, the European Space Agency (ESA), has supported the grant through the Integrated Application Promotion (IAP) Programme.

完整的图片

具有远程监控和实时监控的能力至关重要。Geoshm使用使用Leica GeoSystems GNSS接收器和软件收集的实时数据，以通过财团开发的Geoshm变形分析师分析桥梁的操作条件。

Leica GeosystemsGNSS monitoring systems provide the complete picture by producing 3D real-time displacements and tilt of the bridge. GeoSHM converts data into useful information to end users and delivers it through a web-based interface that provides precise deformation information that allows bridgemasters to understand the loading and response effect of the bridge under normal loading conditions.

Bridgemasters can measure the performance of structural design models against the current conditions to identify unusual deformations under extreme weather conditions and detect movement at millimetre level. When deformations surpass designated parameters, the GeoSHM Deformation Analyst issues an early and emergency warning. In this way, GeoSHM provides a service that offers 24/7 monitoring, and facilitates a targeted maintenance by identifying structural failures promptly and assessing the bridge after an event.

“我们选择了Leica Geosystems产品的高定位精度bob综合app下载和可靠性。这GR10， 这GM30receivers and theLeica GNSS Spider软件稳定，易于使用，并提供了出色的效果。“整合Leica GeoSystems GNSS技术使我们能够简化流程，节省时间，并远程控制和监视项目的状态。”

这test platform

这Forth Road Bridge, a long span suspension bridge in east central Scotland, was the test bed for GeoSHM. The bridge was inaugurated in 1964, the longest steel suspension bridge in Europe at that time. When the bridge was designed in the 1950s, engineers could not predict the increasing traffic this crucial corridor between south-east and north-east Scotland would need to support. Initially designed to sustain a traffic of 30,000 vehicles per day, the bridge can normally be exposed to support twice the traffic it was originally designed for.

第四路大桥,就像许多其他跨奥sion bridges, must defy the most challenging conditions, such as unexpected deformation, unusual traffic loading, temperature changes, high winds and extreme tides. Bridgemasters and infrastructure managers, therefore, have an urgency to understand the behaviour to develop a maintenance programme that allows access to a rapid, targeted, and automated assessment of the bridge’s health to assure cost efficient maintenance and management.

您可以信任的传感器网络

目前，Geoshm服务从四个永久性Leica Geosystems GNSS接收器和两个衡量风速的动态测量值收集了Forth Road Bridge数据，但是该计划将由财团进一步扩展。Leica GNSS蜘蛛软件提供了用于控制和操作已安装的GNSS参考站和网络的专业解决方案。GNSS接收器通过互联网处理实时通过Leica Spider收集和流式传输数据，从而提供了与Geoshm变形分析师分析桥梁健康状况的位置。

一个Leica GR10参考站设置在桥之上，三个Leica GM30监控接收器设置为整个桥梁，以从GNSS卫星中获取数据，并通过光纤网络发送到本地枢纽。GNSS数据是通过安全的Internet连接到诺丁汉大学中央处理中心的安全连接来处理的，并将其与从桥梁传感器收集的数据集成在一起，以生成变形和以毫米精度和高分辨率的变形和位移信息的变化。在控制中心，将进一步处理的GNS数据作为变形信息与Insar（遥感中使用的雷达技术）结合使用，以测量长期结构趋势和局部环境效应。

A proven solution

Using Leica Geosystems monitoring technologies, together with other sensors, the GeoSHM project aims to establish a state-of-the-art system that can address the challenges in structural deformation monitoring of long bridges, and other critical infrastructure, with a model that combines reference monitoring systems with the engagement of multiple stakeholders. As a next stage of development, GeoSHM will be expanded on a selection of bridges in China.

Geoshm使用使用Geoshm变形分析师发动机授权的Leica Geosystems GNSS解决方案，表明对这种关键运输基础架构有深入的了解和监测可以扩展和维护老化桥梁的寿命。Leica GNSS监视解决方案提供了重要的信息，以通过有针对性的检查方法和及时确定潜在的结构损害来降低维护成本。