Researchers of the Fraunhofer Institute for Nondestructive Testing IZFP in Saarbrücken have developed a sensor system that can detect failures or imperfections in systems and machines quickly and reliably by means of an acoustic noise assessment similar to human hearing. The "hearing" sensor system AcoustiX has already been successfully deployed by John Deere, the American global market leader in the fields of agricultural engineering, to inspect the cutting units of combine harvesters.
In the event that large-scale machines or plants are already in operation, defects or defectively assembled components may result in malfunction of machines and thus in production shutdown and economic loss.
Hence, the quality assurance previous to launch and after the final check of plants or machines is crucial. But what possibilities exist to reliably verify the correct assembly and function of plants or machines without great effort?
Fraunhofer IZFP researchers have intensely engaged in this topic and have developed an inspection solution that provides objective results plus the capacity for permanent quality monitoring of moving or rotating machines and plants.
Reliable failure detection without lavish calibration
In operation, machines and plants generate characteristic vibrations and therefore noises: These noises provide information on the quality since defective mounting or other defects often induce a change in the regular operating noises. Often, assembly personnel who have a good hearing and considerable experience are intrusted with this "inspection task".
However, the human ear is subject to a certain subjectivity: It gets tired after a while and is unfavorably influenced by environmental noises. On the other hand, solutions available on the market often require an adaptation or a calibration, especially in case of even minor construction changes of the plants or machines to be inspected.
An intelligent and fast analysis procedure for multiple industrial fields of application
The AcoustiX sensor system exploits data of individually adjusted acoustic sensors which are directly attached to the machine; alternatively, microphones are used for contactless recording of vibrations or noises of machines or plants:
Failures or imperfections are automatically analyzed and finally logged. Based on the signal assessment, targeted statements on the correct installation and function of the plant or machine are available.
The "hearing" sensor system of the Fraunhofer researchers is not only designed for the control of cutting units but for multiple industrial applications.
The system can be used in all areas where final assembly control or permanent operation monitoring are crucial, e.g., to monitor huge autonomously operated machines and plants or to assess the quality of single assembly units used in test benches.
“The development zeroes in on our analytical methods, the algorithms. They are suited to be integrated in existing inspection lines and can be adapted to fit the individual needs of the customer“, explains Matthias Heinrich, scientist at Fraunhofer IZFP.
Currently, AcoustiX is successfully used at John Deere for the permanent quality monitoring of cutting units of combine harvesters in industrial application; parallel to this, it is currently being validated for series production.
The medium-term goal of the researchers is the precise failure localization as well as the detailled determination of the defect type by means of intelligent algorithms respectively analytical methods.
Matthias Heinrich | Fraunhofer Institute for Nondestructive Testing IZFP | Phone +49 681 9302-3638 | Campus E3 1 | 66123 Saarbrücken, Germany | www.izfp.fraunhofer.de | firstname.lastname@example.org
Sabine Poitevin-Burbes | Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP
Thick metal sheets? Laser welding!
30.11.2018 | Laser Zentrum Hannover e.V.
Optics and laser components out of the printer
28.11.2018 | Laser Zentrum Hannover e.V.
New Project SNAPSTER: Novel luminescent materials by encapsulating phosphorescent metal clusters with organic liquid crystals
Nowadays energy conversion in lighting and optoelectronic devices requires the use of rare earth oxides.
Scientists have discovered the first synthetic material that becomes thicker - at the molecular level - as it is stretched.
Researchers led by Dr Devesh Mistry from the University of Leeds discovered a new non-porous material that has unique and inherent "auxetic" stretching...
Scientists from the Theory Department of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science (CFEL) in Hamburg have shown through theoretical calculations and computer simulations that the force between electrons and lattice distortions in an atomically thin two-dimensional superconductor can be controlled with virtual photons. This could aid the development of new superconductors for energy-saving devices and many other technical applications.
The vacuum is not empty. It may sound like magic to laypeople but it has occupied physicists since the birth of quantum mechanics.
Process engineers at Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) have developed a method which allows the size and shape of nanoparticles in dispersions to be determined considerably quicker than ever before. Based on gold nanorods, they demonstrated how length and diameter distributions can be measured accurately in just one step instead of the complicated series of electron microscopic images which have been needed up until now. Nanoparticles from precious metals are used, for example, as catalysts and contrast agents for diagnosing cancer. The results have been published in the renowned journal Nature Communications (doi: 10.1038/s41467-018-07366-9).
Even in the Middle Ages, gold particles were used to create vibrant red and blue colours, for example to illustrate biblical scenes in stained glass windows....
The experiments conducted from July until November at the Wendelstein 7-X fusion device at the Max Planck Institute for Plasma Physics (IPP) in Greifswald have achieved higher values for the density and the energy content of the plasma and long discharge times of up to 100 seconds – record results for devices of the stellarator type. Meanwhile, the next round of the step-by-step upgrading of Wendelstein 7-X has begun. It is to equip the device for greater heating power and longer discharges. Wendelstein 7-X, the world’s largest fusion device of the stellarator type, is to investigate the suitability of this configuration for use in a power plant.
During the course of the step-by-step upgrading of Wendelstein 7-X, the plasma vessel was fitted with inner cladding since September of last year.
03.12.2018 | Event News
28.11.2018 | Event News
23.11.2018 | Event News
05.12.2018 | Agricultural and Forestry Science
05.12.2018 | Health and Medicine
04.12.2018 | Ecology, The Environment and Conservation