Safeguarding Infrastructure: Supporting Smarter Bridge Performance

Structural Health Monitoring (SHM) plays a vital role in ensuring the safety and longevity of critical infrastructure such as bridges. Integrating Brainboxes industrial Ethernet and PoE modules into monitoring systems allows engineers to continuously collect and analyse data from embedded sensors. This enables them to detect early signs of structural degradation and respond before failures occur.

SHM environments present significant challenges. Systems must handle high-frequency data streams, often thousands of samples per second, while operating in harsh, bandwidth-constrained conditions. These data streams include strain gauge readings, accelerometer measurements, vibration patterns, wind speed, and temperature. Maintaining reliable data transmission is essential for accurate structural analysis and decision-making.

Accolade Measurement, a company specialising in precision load testing and structural health monitoring, provides assurance through modern solutions. By integrating high-speed acquisition systems with networked sensors, they enable seamless, cloud-based monitoring. Their systems sample data at rates of up to 100 kHz and transmit event-driven insights over 4G networks. As a result, engineers can record bridge parameters, validate modelling, and guarantee safety across complex infrastructure projects.

On a large span motorway river crossing, a two-and-a-half metre anti-climb steel barrier began experiencing structural issues. These issues were linked to vibration behaviour previously identified in similar aluminium barrier systems. Wind striking the barrier at certain angles caused resonance, resulting in vibration-related fatigue and failing welds. Accolade Measurement deployed a high-frequency monitoring system incorporating accelerometers and wind measurement equipment to quantify the local conditions. Crucially, the system depended on reliable communication between multiple devices and real-time data transmission over a 4G network.

To meet these demands, Accolade uses Brainboxes Ethernet switches for DIN rail cabinet installations and Ethernet to Serial devices. The compact design and DIN rail compatibility allow for easy installation within industrial enclosures, while their 24V support matches the client’s existing electrical setup. The devices deliver stable, low-power operation in the challenging roadside environment with minimal configuration required. This helps engineers stream vibration data in real time. Additionally, the devices enable the team to accurately link wind conditions with structural behaviour, supporting root-cause analysis and informing remediation strategies.

“Brainboxes devices just work and if something just works, then you don’t notice it. That’s a testament in itself.” – Alex Whittaker, Head of Engineering & Technology at Accolade Measurement

On an ageing cast iron railway bridge, strain gauges were installed to monitor structural behaviour under operational loads. Due to the extremely high sampling rates, even brief communication interruptions can lead to significant data gaps, potentially masking signs of stress or fatigue. In a live railway environment, missing or corrupted data can compromise engineers’ ability to accurately assess bridge performance under load. This can make it difficult to identify emerging defects or validate maintenance decisions.

To mitigate this, the team implemented a resilient network architecture using Brainboxes industrial switches. The network switches provide continuous connectivity between sensing equipment and on-site processing units to ensure critical monitoring data could be captured without interruption. Their plug-and-play design assists with rapid deployment within the existing cabinet infrastructure, avoiding complex configuration work in a restricted rail environment. Integrating the switches enables engineers to confidently analyse how the bridge behaves under repeated operational loads. Additionally, Brainboxes connectivity devices help them to make more informed decisions about ongoing inspection requirements.

One of the most challenging projects involved Accolade Measurement working on a historic bridge. Their clients required combined structural and visual monitoring to understand how surface cracking was developing over time. Their goal was to remotely monitor cracks while maintaining dependable connectivity. PoE cameras were used to simplify installation, allowing power and data to be delivered over a single Cat6 cable. This made it possible to position cameras flexibly across the bridge, with the cable runs extending up to 100 metres without compromising performance. However, delivering reliable power and connectivity over these distances requires a robust and centralised PoE infrastructure.

To support this system, Brainboxes PoE devices and unmanaged switches supply constant power and stable network distribution from a single control enclosure. This setup ensures that cameras remain operational in an exposed environment, supporting uninterrupted visual monitoring. Engineers can now remotely observe crack development in real time. The PoE modules equip the team with a comprehensive understanding of how defects evolve, supporting faster and more informed maintenance decisions.

As infrastructure continues to age and monitoring requirements become more complex, the demand for high-performance SHM systems is increasing. By combining advanced sensing technologies with resilient industrial networking from Brainboxes, Accolade Measurement delivers accurate, real-time structural insights for their clients. This integrated approach helps engineers to capture high-frequency data, improve diagnostic accuracy, and make informed decisions that extend the life of critical infrastructure.