SIROM3 -- A Scalable Intelligent Roaming Multi-modal Multi-sensor Framework

Understanding the future transportation infrastructure performance demands a smart Cyber-Physical Systems (CPS) approach integrating heterogeneous sensors, versatile computing systems, and mobile agents. However, due to sensor versatility and computing intricacy, designing such systems faces challenges of immense complexity in mobile sensor fusion, big data handling, system scalability, and integration. This paper introduces SIROM³, a Scalable Intelligent Roaming Multi-Modal Multi-Sensor framework, for next generation transportation infrastructure performance inspection. SIROM³ offers a scalable and expandable framework through orthogonally abstracting software / hardware structures in a layered Run-Time Environment (RTE), which facilities sensor fusion, distributed computing, communication and mobile services. A Heterogeneous Stream File-system Overlay (HSFO) and a flexible plug-in system (PLEX) are embedded in SIROM³ to simplify big data storage, processing, and correlation. To evaluate the scalability of SIROM, we implemented a mobile sensing system of 30 heterogeneous sensors and 5 computing platforms coordinated by 1 data center. SIROM´s expandability is highlighted by adding an advanced radar platform which required less than 50 lines of C++ code for integration. Over 20 terabytes of data covering 300 miles have been collected, aggregated, and fused using SIROM³ for comprehending the pavement dynamics of the entire city of Brockton, MA. SIROM³ offers a unified solution and ideal research platform for rapid, intelligent and comprehensive evaluation of tomorrow´s transportation infrastructure performance using heterogeneous systems.