The Kistler Group has announced that it will showcase its latest solution for bridge protection and traffic safety, a comprehensive Structural Health Monitoring (SHM) portfolio, for the first time at Intertraffic 2024 in Amsterdam from April 16-19.
At booth 410 in Hall 1, experts will also reveal the potential of digitalization through the new KiTraffic Digital platform, an advanced and accurate Weigh In Motion (WIM) system.
Structural Health Monitoring
Overweight trucks, extreme weather, cracking, and corrosion are just a few of the factors affecting bridge infrastructure and shortening its lifespan. When structural deficiencies become too severe, drastic measures need to be taken, such as closing a bridge or imposing heavy limitations on traffic.
To avoid such restrictive actions and to extend the life of bridges, Kistler has developed its unique Structural Health Monitoring (SHM) portfolio. The system automatically monitors the bridge structures on a 24/7 basis, continuously measuring and tracking the actual structural resistance of the bridge and the real traffic load as reported by the integrated WIM system.
This way, it detects even the smallest structural movements and vibrations as they occur and before they cause more serious damage. Structural engineers and road operators are constantly informed of the relevant data and are notified immediately via notifications and alarms.
The customized SHM system provides seamless availability of highly reliable bridge structural data thanks to the accuracy and performance of its acceleration sensors from the K-Beam family. The quality of the results depends on the sensitivity, frequency range, temperature stability, and signal-to-noise ratio of the sensors, as well as on the performance of the data acquisition system.
Accelerometers from Kistler are specifically designed to withstand even the most extreme weather conditions. They operate in temperatures ranging from -55°C to 125°C, have highest temperature stability (variations below 0.01 %/°C), measure highly accurately from 0 to 1500 Hz and can precisely detect even smallest vibrations.
In addition to precise sensors, the turnkey solution consists of the KiDAQ data acquisition system and a cloud-based software platform. “This allows users to easily access the data and configure all the equipment remotely,” said David Cornu, head of business unit traffic solutions at Kistler. “This type of system can be used not only to monitor damaged bridges, but also be implemented on new bridges or bridges under reconstruction. Our experts in measurement technology and structural engineering will assist users and operators in designing the optimal monitoring solution.”
WIM for increased bridge safety
Traffic loads, especially overloaded vehicles, have a significant impact on the condition of bridges and accelerate bridge fatigue. They put immense stress on the road surface and the entire structure. The KiTraffic Digital Weigh In Motion (WIM) system from Kistler detects overweight trucks on the road at any speed and in real time as they pass. Overweight vehicles are easily identified and can either be automatically fined, stopped, and forced to unload, or diverted to an alternative route. All these measures ensure a highly effective protection of both pavement and bridge
The advanced KiTraffic Digital platform harnesses the power of digitalization: the complete system provided by Kistler is based on several rows of Lineas Digital sensors installed in the road and a proprietary data acquisition and processing system installed in the roadside cabinet. The Lineas Digital are the world’s first fully digitized WIM sensors, generating a vast amount of valuable data to ensure longevity of roads and bridges.
Furthermore, their unique piezoelectric quartz crystals provide extreme measuring accuracy, with a weighing precision of up to +/- 2% for the gross vehicle weight. This makes KiTraffic Digital the most accurate WIM system available to date and the first in the world to receive the OIML R134 certification for accuracy class F5 from the Swiss Federal Institute of Metrology, METAS. With this certification, the system can be used for automatic enforcement of overloaded vehicles, known as direct weight enforcement.
