Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Laser system used to monitor architectural structures in the city walls of Ávila

Researchers from the University of Salamanca used a terrestrial laser scanner (TLS) to evaluate the structural condition of the city walls of Ávila. The system, used to aid maintenance of the structure, can detect collapse and movement within the stones.

The TLS, a laser measuring tool used to detect deterioration within architectural structures, was used by researchers from the University of Salamanca to assess the state of the city walls of Ávila. The recently-invented system is used in monument maintenance work, above all on structures built centuries ago.

“The laser takes a very quick reading of the structure, from which we obtain a three-dimensional image,” Diego González Aguilera, co-author of the study published in the journal Nondestructive Testing and Evaluation, and an engineer at the University of Salamanca, told SINC.

The work began with data collection. This involved the researchers measuring the Ávila walls in situ, specifically the belfry of the Puerta del Carmen gate, using a TLS. “This scanner emits a laser beam which bounces off the monument and returns to an internal sensor, measuring the distances between each point of the wall,” says the expert, adding that “the laser beam sweeps the entire surface of the monument”.

The TLS takes two measurements, one of the inside part and the other of the outside of the walls, using 1.5 million and 2.5 million points, respectively. “These data are then analysed in the laboratory, where algorithms are used to create a 3D representation of the surface of both sides,” says the researcher.

“One measurement alone is not enough to evaluate damage, however,” adds González Aguilera, “because each must be compared with previous or later samples.” In this study, the researchers collected data at a six-month interval, because “the further apart in time the samples are taken, the greater the changes that can be observed”, he explains.

This allows two types of architectural pathologies to be picked up: collapse, which is a wall’s loss of verticality, and complete movement of the wall itself. The engineer points out that “the two sets of data and the amount of information collected must correlate in order for the results of the study to mesh together properly”.

Other methods besides the TLS are used in to evaluate architectural structures. “The most classic is the theodolyte system to measure topography, although there are also other tools such as GPS,” explains Aguilera. This study used the TLS because it is a new system that does not damage a structure and “it had to be tested in a complex situation”.

SINC Team | alfa
Further information:

More articles from Architecture and Construction:

nachricht Rock solid: Carbon-reinforced concrete from Augsburg
11.10.2016 | Universität Augsburg

nachricht Heating and cooling with environmental energy
22.09.2016 | FIZ Karlsruhe – Leibniz-Institut für Informationsinfrastruktur GmbH

All articles from Architecture and Construction >>>

The most recent press releases about innovation >>>

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

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

Im Focus: New Products - Highlights of COMPAMED 2016

COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.

In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...

Im Focus: Ultra-thin ferroelectric material for next-generation electronics

'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.

Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Resolving the mystery of preeclampsia

21.10.2016 | Health and Medicine

Stanford researchers create new special-purpose computer that may someday save us billions

21.10.2016 | Information Technology

From ancient fossils to future cars

21.10.2016 | Materials Sciences

More VideoLinks >>>