This is my archive

An Introduction to High-Definition Fiber Optic Sensing

We encourage you to watch the exciting and informative webinar hosted by David Potter from Luna Innovations. Principles of distributed sensing approach are discussed, and many practical examples are presented, including civil engineering applications with Nerve-Sensors! 💪
 Here you can find the link:
“An Introduction to High-Definition Fiber Optic Sensing”

With the ever-growing demand for intelligent and autonomous systems, fiber optic sensing continues to evolve as a critical tool to acquire the essential measurement data and insights that engineers need. More specifically, high-definition fiber optic sensing (HD-FOS) has emerged to play a critical role in the development, manufacturing, and maintenance of today’s advanced products and technologies across many industries, including aerospace, electric vehicles, energy and civil infrastructure.

As an alternative to traditional test and measurement sensors, such as strain gages, thermocouples and RTDs, HD-FOS delivers a versatile solution to easily measure more critical data without the hassle and limitations of bulky electrical sensors and their associated cabling.  And compared to other fiber optic sensing technologies, HD-FOS is the only solution that converts a standard optical fiber into an ultra-fine resolution linear sensor for accurate strain and temperature measurements.

This webinar will describe how fiber optic sensing works and the basics of how HD-FOS is used and applied. We will also review examples of successful HD-FOS applications in several areas, including structural testing with advanced composite materials, thermal monitoring for manufacturing process control, thermal analysis of battery and powertrain systems, and structural health monitoring involving crack and defect detection in concrete and modern composite components.

Mediterranean conference marathon behind us

We were really pleased to be the participant in the 10th European Workshop on Structural Health Monitoring in Palermo. We presented a paper „Composite and monolithic DFOS sensors for load tests and long-term structural monitoring of road infrastructure„.
Just after that, we visited beautiful Barcelona to discuss bridge maintenance, safety and management (IABMAS2022) with the use of composite DFOS sensors and DFOS approach. Our paper, ’Distributed fibre optic sensing for safety monitoring of concrete, steel and composite bridges’, summarised the Polish achievements to date in bridge monitoring using DFOS technology and monolithic Nerve-Sensors. We also presented our first projects in Germany and USA.

Thanks to the Organizers and Participants for these great events. We met interesting people and engineers from all over the world, and it was our pleasure to have such informative conversations!

Distributed sensing at Lodz University of Technology 

We have already collaborated with almost all technical universities in Poland. Now, the list has been extended by the Lodz University of Technology (Politechnika Łódzka). It is our pleasure to support measurements of reinforced concrete slabs and beams strengthened with shape-memory steel. This unique research is done under the supervision of prof. Renata Kotynia. Congratulations! 👍💪

Most outstanding exhibition in Edinburgh!

We are pleased to announce that SHM System & Nerve-Sensors stand was awarded for the most outstanding exhibition at the 18th European Bridge Conference in Edinburgh! Congrats to our team for this great job!

We also presented an article: „Composite DFOS sensors as a nervous system of smart bridges – examples of load tests” during this event. 

More about the Conference you can find here: https://www.structuralfaultsandrepair.com/

Our first German-language article in Beton- und Stahlbetonbau!

We are pleased to present the first German-language article describing the capabilities of composite monolithic sensors in monitoring reinforced and prestressed concrete structures!

📖📖📖 Enjoy your reading!

Distributed strain measurements of prestressed concrete elements with fibre optic sensors – abstract

The article presents the application of the technology of distributed strain measurements to prestressed concrete members. Distributed fibre optic sensing technology is based on light backscattering and enables strain measurements with high spatial resolution over the entire length of the optical fibre. Such an approach allows the replacement of thousands of conventional spot strain gauges, arranged in series, with a single optical fibre. The article presents composite fibre optic sensors and their application for strain measurements and cracks development investigations. Three practical examples of prestressed concrete elements were described, namely truck scale platforms, prestressed concrete girders with a length of 24 meters, and one of the largest bridges in Poland. The structural members were analysed at different stages of construction, during fabrication and hardening, tendon activation, installation, proof loading, and also as a post-installed measurement system. The aim of this article was to demonstrate the possibilities of measurements with composite distributed fibre optic sensors.

Post-yielding strains – new paper in Measurement!

Good news! 🙂
We encourage you to read the new article in Measurement, Elsevier.
EpsilonSensor was embedded directly into a concrete slab to monitor extremely high crack-induced strains. Also, DFOS fibres allowed for detailed analysis of post-yielding behaviour of reinforcing bars in slab-column RC system during column failure simulation.

Thanks to Politechnika Rzeszowska im. Ignacego Łukasiewicza for this impressive research and fruitfull cooperation! 👏

📖📖📖 Read the article HERE.

ABSTRACT

Flat slab systems made of reinforced concrete (RC) are popular structural solutions widely used in practical applications. The knowledge about their behaviour under extreme loading conditions, including the loss of the columns, is still being developed worldwide. Also, new materials are tested for this purpose. The research presented hereafter in the article includes the progressive collapse simulation caused by removing the external column in the flat slab system reinforced with B600B steel. One of the aims of the research was to assess the effectiveness of the applied reinforcement after losing the column, depending on the degree of horizontal tie reinforcement. The structural behaviour of the entire reinforced concrete system during the experiment was controlled using advanced reference techniques, including distributed fibre optic sensing DFOS, optical image correlation system, total station as well as conventional strain and displacement transducers. The article focuses on the possibilities of DFOS sensing in an extensive range of strains caused by the steel yielding and the cracks directly in concrete. Thanks to distributed measurements and monolithic composite sensors, it was possible to detect all the cracks and reflect their patterns during all load stages until structural failure. The article describes the methodology and discusses the results of this pioneer measurement approach. Despite the extensive state of the art in distributed sensing, the paper provides the new knowledge gained during research. It is mainly related to a DFOS-based solution for extremely high strain measurements thanks to the excellent bonding properties and strain transfer to the optical fibre, from both steel reinforcement and surrounding concrete.

Nerve-Sensors on Luna’s blog!

It’s a great pleasure for us to present applications for Nerve-Sensors with Luna Innovations’ ODiSI high-definition optical interrogator. The performance of the entire DFOS system is always based on the quality of both the sensors and the datalogger.

With Luna’s HD-FOS technology, Nerve-Sensors have been deployed in a wide range of civil and geotechnical structures for accurate and reliable measurements of strains, cracks, stress, displacements, vibrations, or temperatures!

Looking forward to new exciting projects! 🤝💪😃

📖📖📖 Read more on Luna’s blog!

Deltares project in Netherlands

Nerve-Sensors in action again! This time our team is working in Deltares equipping the piled embankment test facility with our EpsilonSensors and custom-made 3DSensors grids. This challenging and engaging research is conducted within the GEOLAB Project together with other partners: KELLER and Technische Universität Darmstadt.

Our team delivered sensors and supervised their installation process. After a few weeks of intensive research and measurements, distributed strain and displacement data are now under processing. We are excited and looking forward to the first results!

Meet us at EWSHM 2022 in Palermo!

Meet us at the 10th European Workshop on Structural Health Monitoring in Palermo, Italy. Nerve-Sensors will be one of the conference exhibitors and author of the scientific publication.

This Workshop will represent a forum where experts from around the world discuss the latest advancements and breakthroughs in the field of SHM and more broadly in the fields of nondestructive evaluation, smart materials and intelligent systems. The Workshop will foster the discussion and identification of key and emerging challenges and opportunities in research, development, and field applications.
For more information please visit the event website.

Proceedings of CSHM-8 Workshop

Nerve-Sensors Team presented a paper about 3DSensor during the 8th Civil Structural Health Monitoring Workshop (CSHM-8), held on March 31–April 2, 2021. The workshop represented a forum where experts from around the world discuss the latest advancements and breakthroughs in the field of civil structural health monitoring (SHM) and more broadly in the fields of smart materials and intelligent systems for civil engineering applications. The main theme of the Workshop was “Ageing structures and infrastructures in hazardous environment”.

Our article „Possibilities of Composite Distributed Fibre Optic 3DSensor on the Example of Footing Pulled Out from the Ground: A Case Study” has been printed in the conference proceedings written by leading experts in the field and published by Springer. The paper is available for purchase here: SpringerLink