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 Superconductivity research reveals potential new state of matter
17.08.2017 | DOE/Los Alamos National Laboratory

nachricht Spray-on electric rainbows: Making safer electrochromic inks
17.08.2017 | Georgia 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: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

Gold shines through properties of nano biosensors

17.08.2017 | Physics and Astronomy

Greenland ice flow likely to speed up: New data assert glaciers move over sediment, which gets more slippery as it gets wetter

17.08.2017 | Earth Sciences

Mars 2020 mission to use smart methods to seek signs of past life

17.08.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>