Infrastructure / Construction

Pylon bridge over the Stralsund haven

Infrastructure / Construction

Many buildings and infrastructure elements currently reach their projected lifetime limits and require regular condition assessment in order to ensure safe subsequent using and to identify the possible need for repair or replacement. Periodic inspections as prescribed by law can not comply this task with absolute certainty, since they were not designed for the conditions in the lifetime limits.

Permanent condition monitoring is a strategy of choice to provide both need-based examination of structures and early detection of potentially dangerous defects. To this, the ability of permanent condition monitoring to reliably identify structural deviations that require further examination is crucial. Such deviations include formation and growth of cracks or corrosion damage, changes in the inclination angle or material aging. Additionally, the detection of short-term mechanical overloads may be of interest. The detection of some special types of defects is even more reliable by means of permanent monitoring, since often it‘s easier to track the change of a state than to detect the mere existence or even the location of a defect. Such condition monitoring requires nondestructive measurement devices which are constantly attached to the specimen. Nowadays, nondestructive sensors are able to detect and to track most of the mentioned damage processes long before failure.

Fraunhofer IZFP's respective R&D work is tied in its business unit "infrastructure / construction".

BetoFlux: Portable Magnetic Flux Leakage Inspection System for ­Detecting Corrosion Damage in Prestressed Concrete Poles

© Photo BauConsulting Dr. Walther

Magnetic flux leakage inspection

Intuitive representation of the location and condition of ferromagnetic prestressing steel

Specifically designed for portable use

Easily adapted to different concrete pole diameters

Less effort compared to alternative inspection methods such as X-ray

Minimal risk of additional pole damage

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MoniDAQ: Self-Sufficient Platform for Permanent Condition Monitoring of Infrastructure Constructions

© Photo Katharina Wieland Müller- Pixelio

MoniDAQ: Modular, energy self-sufficient board providing eddy current inspection, inclination measurement, magnetic flux leakage inspec­tion, ultrasonic inspection, etc. and recording all sampled data over long periods of time while dissipating extremely low amounts of energy

Self-sufficient and eco-friendly power supply by integrated photovoltaic cell

Maintenance-free long-term operation

Supersensitive defect detection

Telemetric data recovery by radio-controlled interface

Low costs per unit

Unique combination of Fraunhofer IZFP‘s proven nondestructive sensor technology

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BetoScan: Robot Platform for NDT Sensors

© Photo Fraunhofer IZFP / Uwe Bellhäuser

BetoScan

Autonomous, self-navigating robot platform designed for NDT sensors

For inspecting several hundred square meters of concrete parking decks per day in high resolution (single-person operation)

Autonomous operation over obstacle-free surfaces using a pre-defined pattern

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