Scientists of KIT and Ruhr-Universität Bochum (RUB) have reached a record precision in radar distance measurements. With the help of a new radar system, an accuracy of one micrometer was achieved in joint measurements. The system is characterized by a high precision and low cost. Potential applications lie in production and plant technology.
Precise determination of distances is of increasing importance in fabrication technology, for instance, when actuating robots, producing micromechanical components, or controlling machine tools. Frequently, glass scales, inductive sensors, or laser measurement systems are used for distance measurements. Glass scales are very precise and reach micrometer precision. However, they are too inflexible and expensive for daily use.
Inductive sensors measuring distances with a coil, magnetic field, and movement work in a contact-free manner and, hence, without wear, but are limited in the measurement repetition rate. Lasers also allow for a highly precise measurement, but are not suited for environments with dust, humidity, or strongly changing light conditions. Radar signals, by contrast, can penetrate dust and fog quite well. So far, radar systems have been used mainly for weather observation, air monitoring or distance measurement in vehicles.
Scientists of the Institut für Hochfrequenztechnik und Elektronik (IHE) of Karlsruhe Institute of Technology (KIT) under Prof. Thomas Zwick and of the Chair for Integrated Systems of Ruhr-Universität Bochum (RUB) under Prof. Nils Pohl have now developed and successfully applied a radar system for distance measurements. It is characterized by a so far unreached precision: In a joint test in July this year, the researchers from Karlsruhe and Bochum reached a new record precision for radar distance measurements of one mi-crometer. One micrometer is a millionth of a meter. For comparison: A human hair is about 40 to 60 micrometers thick.
For measurement, the scientists use a frequency-modulated continuous wave radar (FMCW radar), whose emitter is operated continuously during measurement. The RUB researchers developed the hardware, KIT scientists the algorithmics. The radar system with a special measurement setup measures distances of up to several meters in free space with micrometer accuracy. Compared to laser systems, this system is not only cheaper, but can also measure absolute positions. Due to this quasi unlimited range of uniqueness, the radar is far superior to the laser.
The radar system is now being optimized in several research projects. Its accuracy will be further improved. In the future, it will be used to make measurements in production and plant technology with high precision, in a flexible manner, and at low costs.
Karlsruhe Institute of Technology (KIT) is a public corporation according to the legislation of the state of Baden-Württemberg. It fulfills the mission of a university and the mission of a national research center of the Helmholtz Association. KIT focuses on a knowledge triangle that links the tasks of research, teaching, and innovation.
For further information, please contact:Monika Landgraf
Monika Landgraf | EurekAlert!
Energy hybrid: Battery meets super capacitor
01.12.2016 | Technische Universität Graz
Tailor-Made Membranes for the Environment
30.11.2016 | Forschungszentrum Jülich
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...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
02.12.2016 | Medical Engineering
02.12.2016 | Agricultural and Forestry Science
02.12.2016 | Physics and Astronomy