监视the structural health of 80-year-old Royal Canadian Air Force Warren Truss hangars

作者：TFD

监视the Structural Health of 80-year-old Royal Canadian Air Force Warren Truss Hangars

本来是临时的许多急速建造的飞机机库，在第二次世界大战期间建造的飞机机库仍在使用。例如，加拿大武装部队在全国各地仍然维持大约70个沃伦·桁架机库。魁北克St-Jean的加拿大部队基地（CFB）有几个沃伦·桁架机库，可以满足当前的运营要求。尽管仍然有效，但这些机库确实构成了一些结构完整性和可维修性的问题。Safety limits placed on the buildings have an impact on CFB St-Jean’s day-to-day operations, so the Canadian Department of National Defence (DND) asked a research team (The RMC Green Team) from the Royal Military College of Canada (RMC) to investigate. The team devised a remote, continuous, real-time structural health monitoring (SHM) programme that includes the use of Leica Geosystems instruments. The SHM is both an alert system and a tool for in-depth structural analysis.

开发一种基于研究的数据驱动的方法来建立安全

The heritage timber hangers, constructed using 34m long double-span Warren trusses, were part of the Royal Canadian Air Force’s contribution to the British Commonwealth Air Training Plan in 1942. Material shortages during wartime, material degradation, environmental stresses, and significant repairs have weakened or altered the stress distribution within the buildings. To define whether they are still safe to use, DND approached Dr Nicholas Vlachopoulos, Full Professor, Civil Engineering Department, from RMC to design and install a monitoring program. Lt Henry Helmer-Smith, a PhD student, is the lead researcher on the project, supervised by both, Dr Nicholas Vlachopoulos and Dr Marc-André Dagenais from the Civil Engineering Department at RMC.

机库1 - 现在是CFB St Jean的供应台 - 是被选为监视的结构。当屋顶上的积雪超过10厘米（4英寸）时，必须撤离该机库é在冬季。除其他问题外，团队想找出这种积雪限制是否需要撤离。

Long-term, continuous and remote monitoring with real-time alerts

The RMC Green Team built a monitoring system including solutions such as theLeica Nova TM50具有反射EDM（R1000）的自动总站和Leica Geomos软件套件。Vlachopoulos博士说：“首次与国防部内部沃伦·桁架结构的性能进行结构性健康监测解决方案，自然，自然，自动总计，尤其是leica Geosystems产品，在初始列表中亚博5分钟快三亚搏彩票手机版下载可能的解决方案。”

关键要求是总站可以连续可操作，远程访问，可就业的长期且最重要的是能够亚博5分钟快三传输警报消息。该程序中包括挠度监测，这些工具能够根据机库内的桁架和其他结构成员的绝对，短期和长期位移来向用户或机库乘员发送警报以撤离。综合且灵活的Geomos监视系统包括其他几种警报选项sensor connection loss, power failures, target loss (line-of-sight issues), among many others. The alarm system was programmed to communicate directly with users via email (built into GeoMoS Monitor) or SMS text by means of ASPSMS.com,SMS监视解决方案这与Geomos Suite兼容。之所以选择Leica TM50是因为它满足了要求，并且因为兼容的Leica软件可以实时通过电子邮件和文本传输警报，以解决紧急情况。此功能通常用于监视建筑物的离散点。

“Extremely effective instrument for emergency monitoring”

Leica TM50自动总站于2018年春季安装在机库1中，今天仍在运行。它是使用Geomos Monitor编程的，以两个小时的间隔在整个建筑物中测量20个以上的目标。然后，Geomos Analyzer用于远程和实时读取和显示所有处理的数据。根据指定的限制，可以增加读数的频率并在需要时变得连续。如果达到限制，则发出警报。Helmer-Smith说：“ TM50的可远程可操作功能以及实时传输和显示数据的功能使其成为紧急监控的极为有效的工具。”由于总站提供了准确和实时的反馈，因此基地能够减少机库1的撤离数量。

“比其他设备更有用户友好”

Before the monitoring equipment was installed, the research team built a quarter-size scale model of a single-span truss to test in the Structures Laboratory at RMC. The laboratory phase aimed to test the monitoring system and problem solve any limitations. Dr Vlachopoulos says: “The total station itself was very user-friendly and only took a few hours to learn. The software and messaging configuration took a few days to optimise and fully understand. Notably, this instrument was significantly more user-friendly than other equipment we tested.”

在全国范围内扩大成本效益的监控计划

除了成功的紧急监控外，Leica Geosystems Total Station还用于对Warren Truss机库的深入结构分析。这种深入的分析提供了有关桁架结构的真实行为的重要信息。该解决方案具有成本效益，因为它可以减少必要的现场访问。该团队通过Geomos Monitor远程访问总站，并从他们位于金斯敦的办公室进行离散测量，距离超过300公里。在审判之后，将对监视计划进行优化，以期在全国范围内扩展该项目。如果安全，机库将继续他们的漫长而模范的服务。

Interested in monitoring? Please feel free to read further case studies, showing how our customers use our solution to improve their monitoring workflow:

监视Case Studies