At INTERGEO 2010, the Freiburg based Fraunhofer Institute for Physical Measurement Techniques IPM had the latest developments in the field of fast distance measuring with laser scanners on show.
Apart from their outstanding scientific expertise, the measurement technology specialists also presented their years of experience in building complete system solutions. In recent years Fraunhofer IPM has acquired numerous customers worldwide thanks to the institution’s tailor-made system solutions, particularly for railway-specific applications.
Mobile mapping applications are growing in relevance in the road transport arena. This is where the fast, accurate, and eye-safe laser scanners from Fraunhofer IPM can prove their strengths as well.
New systems for railways
There are two different ways that laser scanners can contribute to smoothly flowing railway traffic: For mobile applications, the scanner is mounted on the train and measures the desired position data of objects near the track while moving past them. For stationary applications, the laser scanner remains at a fixed position at a monitoring station next to the track and measures the geometries of passing trains.
* Contact wire position recording: Recording the position of the contact wire is a common application for use on inspection cars. Today, state-of-the-art complete systems from Fraunhofer IPM record 400 measurement profiles per second. In this way, at a speed of 100 km/h, the desired position data can be obtained for up to four contact wires simultaneously at intervals of 7 cm, along with online analyses.
* Detecting objects and structures near the rail track: Another mobile application serves to detect objects and structures near the rail track, such as platforms, tunnels, or bridges. The required position and safety clearance data are recorded with the help of a circular scanner mounted on the front of the inspection train. Fraunhofer IPM's basic scanner uses one laser beam and a scan frequency of 200 Hz, while the high-speed version has two laser beams and a scan frequency of more than 550 Hz.
* Train monitoring: Train monitoring performed directly in the course of normal railway operations can increase rail track safety significantly – particularly in sensitive track sections such as tunnels or bridges. To this end, monitoring stations are equipped with laser scanners from Fraunhofer IPM at suitable places alongside the track. Passing cars together with their freight can then be checked for geometric irregularities with 800 measurements per second. This means that at a speed of 100 km/h, the train's geometry is measured at intervals of around 3 cm.
Road data – a new application
Mobile mapping vehicles were also an important subject at INTERGEO 2010. These are measuring vehicles that record the road and its surroundings. Fraunhofer IPM has developed special high-resolution scanners for this application that scan the road surface. These so-called pavement scanners measure elements such as ruts, transverse grooves, or frost cracks with a view to obtaining data on pavement quality. Mounted on a vehicle at a height of around 3 m above road level, the laser scanner is easily capable of recording road surface widths of 4 m while delivering a resolution of less than 1 mm.About Fraunhofer IPM
Holger Kock | Fraunhofer-Gesellschaft
COMPAMED 2016 connected medical devices and people
23.11.2016 | IVAM Fachverband für Mikrotechnik
Successfully transferring Industrie 4.0 into reality
21.11.2016 | Deutsches Forschungszentrum für Künstliche Intelligenz GmbH, DFKI
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
05.12.2016 | Power and Electrical Engineering
05.12.2016 | Materials Sciences
05.12.2016 | Power and Electrical Engineering