17.10. Future Trends in Automated SHM

• Integration with Building Information Modelling (BIM)

The future of Structural Health Monitoring (SHM) is expected to see a strong integration with Building Information Modelling (BIM). BIM is a digital representation of a building's physical and functional characteristics. By incorporating SHM into BIM systems, real-time data on the structural health of buildings can be visualized and analyzed within the digital model. This integration allows for seamless monitoring, predictive maintenance, and immediate data access for decision-makers.

Think of BIM as a smart digital map of a building that not only shows where things are but also how they are performing. For instance, suppose a building's foundation starts to show signs of stress. With SHM data integrated into its BIM model, engineers can instantly see where the issue is and how severe it is, much like having a health app on your phone that alerts you to changes in your vital signs.

• Self-healing materials with embedded sensors

Future SHM will likely utilize self-healing materials that have sensors embedded within them. These materials can autonomously detect damage and initiate a healing process to repair themselves. For example, if a crack forms in the material, the embedded sensors can identify the crack and trigger a chemical reaction that fills the gap, restoring structural integrity. This capability reduces the need for manual repairs and extends the lifespan of the materials used in construction.

Imagine a self-repairing skin for a modern building, much like how some organisms heal themselves when injured. For instance, if you cut your finger, your body works to heal it. Similarly, a building made from self-healing materials can automatically seal small cracks, ensuring it stays 'healthy' without needing an expensive repair.

• Drone-based swarm inspection

The use of drones in SHM is poised to evolve into swarm technology, where multiple drones work together to inspect large infrastructures like bridges and buildings. Equipped with cameras and sensors, these drones can cover more ground efficiently and gather data simultaneously. The swarm can communicate and coordinate, ensuring thorough inspections and reducing the time needed to monitor vast areas or complex structures.

Think of a flock of birds where each bird works together to scout for food. If one bird finds something, it communicates that to the others. Similarly, a swarm of drones can quickly and effectively inspect a large bridge. If one drone spots a crack, it can relay that information to the group so they can further assess the area.

• AI-based predictive maintenance

The incorporation of Artificial Intelligence (AI) into SHM for predictive maintenance is another emerging trend. AI algorithms can analyze historical and real-time data from sensors to predict when a structure might fail or require maintenance. This proactive approach allows for repairs to be scheduled before issues become severe, thus improving safety and reducing costs.

Consider how your car tells you when it needs an oil change before it breaks down. AI-based predictive maintenance works in the same way for buildings. It analyzes data patterns to forecast potential problems, enabling engineers to take action before any harm occurs, similar to how a warning light on your dashboard prompts you to take care of your vehicle.

• Energy harvesting for autonomous sensors

Future SHM systems might incorporate sensors that utilize energy harvesting technologies. These sensors can generate their power from the environment, such as from the vibration of structures or solar energy, ensuring they remain operational without the need for external power sources. This innovation supports widespread sensor deployment while minimizing maintenance needs.

Think of a solar-powered calculator that works without needing batteries. Similarly, energy harvesting sensors can derive power from their surrounding environment, enabling them to continuously monitor and report on structural health without relying on traditional power sources. This is like using the sun to help your garden grow, providing energy for plants to thrive.

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