C+S July 2020 Vol. 6 Issue 7 (web)

The concept of digital twins is finding new applications in the way that we interact with our critical infrastructure like roads and highways, improving reliability and safety, increasing the movement of people and goods, and creating better value for every dollar spent. For the Microsoft Build 2020 developer conference, a team from Bentley Systems and Microsoft explained to software engineers and web developers how to federate civil engineering data with Internet of Things (IoT) data to create a “connected highway.” By integrating Bentley’s iTwin Platform and Microsoft’s Azure Digital Twins, the team was able to combine real-time data from air quality and traffic monitoring devices with civil engineering models, maps, and terrain data to create a living digital twin that enables real-time monitoring of critical infrastructure for safety hazards and traffic incidents. From 0 to 60 in Less than Three Weeks The Bentley-Microsoft team initiated the project with a virtual one- week hackathon that wired up Azure Digital Twins with Bentley’s iTwin Viewer and iModel.js open-source programming libraries. Next, they federated a model of a section of highway with a reality mesh of the surrounding terrain that had been created from photographs cap- tured by a drone survey. They then connected the IoT data layer to give access to real-time and historic data and analytics. The result: in less than three weeks, the team had a geometrically accurate, visually in- tuitive and immersive web application accessible from anywhere 24/7 that gives instant access to live highway conditions and sets off alarms when thresholds are exceeded. Pavan Emani, vice president, iTwin software development for Bentley Systems, said, “iTwin Platform is a developer platform-as-a-service that has a lot of synergies with Azure Digital Twins and complemen- tary capabilities. Users visualize IoT data in our digital twin viewer and can generate insights in Power BI dashboards and Teams. Microsoft’s cloud-first philosophy aligns with ours, and our platforms enable de- velopers to create and deploy digital twin applications in record time. For our integration with Azure Digital Twins and Azure IoT Hub, we went from zero to 60 in three weeks.” “Connected Highway” Demonstrator Shows How Easy It Can Be to Federate IoT Data in Infrastructure Digital Twins Bentley Integrates iTwins with Azure Digital Twins for Single Pane of Glass IoT Application By Jerry King and Pavan Emani

Under the Hood Bentley’s expertise is in aggregation, alignment, and 3D visualization of complex engineering data, as well as the tracking of change. The front-end of the “connected highway” digital twin runs in a standard web browser and relies on Bentley’s iTwin Viewer for 3D visualization. The back-end cloud services run in Azure and bridge data from mul- tiple data sources. The back-end ingests and normalizes data from 2D computer aided design (CAD) files, 3D building information models (BIM), and geographical information systems (GIS). Projects typically start with the model of their physical environment and then federate data from IoT devices to the model. Azure Digital Twins abstracts the IoT layer and provides APIs, which make it easy for developers to integrate live data. A significant benefit of the iTwin-Azure Digital Twin integration is the simplification and time saved by developers by automatically generat- ing from the iTwin the digital twin definition language (DTDL) that is required to create the spatial intelligence graph in Azure Digital Twins. Sam George, corporate vice president, Azure IoT for Microsoft, said, “Bentley makes it easy to build digital twin-based applications for critical infrastructure, smart grid, smart cities, construction, roads, and automotive. Bentley’s iTwin Platform, open APIs, and open-source programming libraries run on Azure and integrate seamlessly with Azure Digital Twins and Azure IoT Hub. Bentley’s iTwin Platform handles complex engineering data, supports 3D visualizations, and can revolutionize the way these projects are planned, built, and operated.” Are You Twinning? The complexity (and associated engineering density) of transportation, utility, and industrial assets make them ideally suited to digital twins. Having a 3D (or, better yet, 4D) model is a game changer for a high- way, an underground metro system, or industrial plant, for example. More importantly, during design and construction and throughout the asset’s operating life, the 3D model changes over time. Logging that change on the asset’s timeline is vital to understand who-changed- what-and-when. Digital twins provide a foundation for predictive and prescriptive analytics, enabling users to respond quickly to incidents with confidence and even anticipate them and head them off before they arise. Connected Highway – Digital Twin Built with Bentley’s iTwin Platform and Azure Digital Twins


july 2020


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