Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Infrared technology for measuring the effect of fire on materials

20.12.2011
The main problem associated with measuring the effects of fire on materials lies in the temperature of the flames, which reaches over 1000 ºC and can obscure the actual temperature of the material.

In addition, there is the problem of the high concentration of gasses (CO2, H2O and others), which makes it difficult to obtain clear images of the sample being subjected to fire. In order to solve this problem, the UC3M scientists who developed this method used a measurement that utilizes the infrared spectrum.

"To do this, we had to use an infrared camera, properly set, spectrally, for measuring the temperature, as well as image processing that allowed us to determine the measurement, discounting the flame's fanning effects", explains one of the authors, Fernando López, a tenured professor in the Physics Department at UC3M.

This research, which was carried out in collaboration with the Airbus Systems Laboratory, and which has been published in the journal Measurement Science and Technology, has applications in the aeronautical industry, where it is essential to know what effects fire will have on the composite materials (fiberglass, carbon fiber, etc.) that are used in airplanes. Moreover, this method could be applied in other sectors where a material's resistance to fire is crucial, such as in rail and land transport or fire protection in housing.

The advantage of using this method of measurement is that it can be done without any direct contact with the material, almost instantly (in milliseconds) and under severe conditions (when flames are present), where other systems of measurement cannot be used, the researchers explain. The professor states that, "The main objective is to quickly and precisely measure the real temperature of the sample over the entire surface, including the part that is hidden by the flames, and to do this from a distance." And he adds, "All of this, as a function of time, and taking into consideration the rise and fall of the temperature over time."

Another line of investigation currently being developed by these scientists from the Laboratorio del Infrarrojo (LIR – Infrared Laboratory) at the UC3M is one that allows them to measure, from a distance, the thermodynamic parameters of materials (emissivity and diffusivity, coefficients of conductivity and specific heat), by means of an infrared analysis of the image. In addition, they are studying ways in which to use their ability to detect hidden subsurface defects that can be generated by fire or other causes.

Measuring temperatures in the presence of flames that are "dirty" based on their subproducts, includes a strong infrared component of absorption and emission that must be discounted in a very precise manner, according to the researchers. This technology falls within the spectral methods, which the LIR-UC3M specializes in, that is, those that are based on properties that depend on the wavelength.

More information:

Title: Infrared thermography of solid surfaces in a fire
Authors: Meléndez, J.; Foronda, A.; Aranda, J. M.; López, F.; López del Cerro, F. J.
Source: Measurement Science & Technology 21 (10): Art. No. 105504 OCT 2010
ISSN: 0957-0233

Ana Herrera | EurekAlert!
Further information:
http://www.uc3m.es

More articles from Materials Sciences:

nachricht Plant inspiration could lead to flexible electronics
22.06.2017 | American Chemical Society

nachricht A rhodium-based catalyst for making organosilicon using less precious metal
22.06.2017 | Tokyo Institute of Technology

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

Im Focus: Optoelectronic Inline Measurement – Accurate to the Nanometer

Germany counts high-precision manufacturing processes among its advantages as a location. It’s not just the aerospace and automotive industries that require almost waste-free, high-precision manufacturing to provide an efficient way of testing the shape and orientation tolerances of products. Since current inline measurement technology not yet provides the required accuracy, the Fraunhofer Institute for Laser Technology ILT is collaborating with four renowned industry partners in the INSPIRE project to develop inline sensors with a new accuracy class. Funded by the German Federal Ministry of Education and Research (BMBF), the project is scheduled to run until the end of 2019.

New Manufacturing Technologies for New Products

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

A new technique isolates neuronal activity during memory consolidation

22.06.2017 | Life Sciences

Plant inspiration could lead to flexible electronics

22.06.2017 | Materials Sciences

A rhodium-based catalyst for making organosilicon using less precious metal

22.06.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>