Health Monitoring and Imaging System for Concrete Structures
WiSys is currently seeking strategic partners operating in the non-destructive testing industry interested in further developing this novel health monitoring system for concrete structures, ultimately providing a route to market for its commercialization.
Patent Filed: April 17, 2018
Stage of Development:
A fully functional prototype system has been developedand in-lab and in-field testing have been completed.
As of 2016, 39% of the total 614,387 bridges
in the US had exceed their design lives. In China, almost 10% of its 779,159
bridges are classified as structurally deficient. Other countries in South
America and Europe are facing similar challenges. With an estimated
rehabilitation cost in the US alone estimated to reach $123 billion, the
development and adoption of new technologies enabling early, non-destructive
testing (NDT) of damage in concrete structures will be critical. Evidence of this increasing demand is the growing market
for NDT equipment and inspection services, which is estimated to reach $26.4
billion by 2024. Currently, there
are a number of NDT techniques on the market, however, they are either not
sensitive to minor interior changes in concrete such as small cracking and
stress changes, or not applicable to full-size structures on site. As such,
there is a clear and unmet need for the development of a comprehensive system
capable of generating images of the cracking, damage and subtle stress changes
inside as well as on the surface of concrete structures.
An assistant professor in civil engineering at the University of Wisconsin-Platteville in partnership with an electrical engineer from New Mexico State University, has developed a comprehensive monitoring system capable of identifying interior defects and stress in concrete structures such as bridges. By combining sensor technology with an ultrasound signal generator, multi-channel data acquisition and proprietary data processing algorithms, the interior conditions in any cross section of a bridge can be visualized in 3D. With this technology, small stress changes in the order of 0.1Mpa and cracks as thin as a human hair are detected. Such a combined system provides competitive advantage over existing methods that solely measure stress changes and rely on installation of strain gauges on the surface or inside concrete structures. These methods only provide for measurement of stress changes at the locations where sensors are placed, creating gaps in the evaluation of stress change. In addition, with current technology, holes must be drilled and patched for sensor placement and bridges must be taken out of service during testing. The proposed technology provides for a more absolute evaluation of not only changes in stress but also identification of cracks, does not require drilling of holes and can be used on in-service bridges, saving time, money and providing a more comprehensive assessment of bridge health.
Structural health monitoring and non-destructive testing for concrete infrastructures including bridges, buildings, mines, tunnels, dams and other earth structures.
- Capable of assessing large volumes of structures by using an array of installed sensors
- Capable of detecting interior micro-defects and weak stress changes with high degree of accuracy with in-service bridges
- Capable of generating 3-dimensional images in real-time enabling the evaluation of damage level and stress change on site and over time