Ingenieur Vol 77 Jan-Mar 2019 ingenieur 2019 Jan-March | Page 55

and computational mechanics. It also requires technical expertise in domains like architecture, bridges, and water conservation. You also have to perform big data analysis and AI-based data mining based on data modelling. Then you need to obtain valid structural damage identification, structural stiffness matrix calibration and reanalysis, and perform structural lifespan predictions. Yunlu + Huawei Cloud EI The system developed by Yunlu Technology and Huawei, Huawei Cloud EI rapidly discovers potential safety hazards through analysis and identification, issues early warnings of possible structural dangers, and provides data support for construction and O&M departments. We have deployed over 50 Huawei Cloud platform development modules. All the services run on Huawei cloud services. We leverage middleware, including data storage services, as well as various platforms, such as ModelArts’ machine learning, deep learning, and image recognition platforms. More specifically, Yunlu Technology has developed five use cases that utilise Huawei Cloud EI. Use Case 1: Data collection The first use case is data collection. For example, fibre-optic sensors can be used to transmit data to a collection device, which then connects to an on- site host, and the data is then transmitted to the cloud. However, this deployment model is complex and expensive. With the increasing interconnectivity of everything, we have adopted Huawei’s IoT modules to make it more convenient to access the system. We also use Huawei’s edge computing modules for prompt data processing. Moreover, by leveraging Huawei’s edge devices we can access data from a variety of sensors to achieve multiple functions using one device. With edge, device, and cloud synergy, overall equipment costs have been reduced by over 70% and the system response is twice as fast. And thanks to Huawei’s edge computing module, we have cut invalid data transmission by two-thirds and increased valid data by over 50%. Use Case 2: Ensuring data consistency The second use case is ensuring data consistency. Numerous departments participate in the data collection process. You also have a very complicated personnel situation and a very long construction lifecycle as well as frequent changes. Ensuring the consistency of data and objects is a common challenge and problem. We leverage the Huawei blockchain platform to distribute all blueprints and contracts through the blockchain. This ensures that data and content from various stakeholders, including owners, planners, designers, construction, and O&M, are unified. Use Case 3: Structural health prediction The third use case is structural health prediction. What we wanted to achieve here is to get prompt information about a construction project. If a building has a defect, we want to quickly replace the defective part to prevent an accident. So we need to make effective predictions about the lifespan and health of a construction project, as capacity changes over time. Using measurements of environmental loads, such as wind and temperature, as well as a structure’s true response, we are able to calibrate the stiffness matrix. Through this process, we can calibrate the overall matrix of the system, or design parameters such as density, elastic modulus, and other constraints, to arrive at the structure’s true current capacity. We can then make accurate forecasts of a building’s structural response using predictable factors such as wind speed, wind pressure, and temperature. With the help of Huawei Cloud’s machine learning engineers, we have achieved a prediction accuracy of close to 90%. Use Case 4: Automatic site inspection The fourth use case is automatic site inspection against construction specifications. With the industrialisation of buildings, there are now many new forms of construction, including what are known as industrialised residential structures. These are precast buildings - the concrete is not cast on site; instead, the components are transported to the site for on-site assembly. Residential industrialisation is already a relatively mature industry and is common in many developed nations. China predicts that precast 53