RISE has developed a high-resolution sensor system to follow the position and orientation of a magnetic marker in three dimensions. This sensor system can find several applications in research and industry. The system can be tailored and optimized for the customer's needs.
Until now, the system has been used in energy research in the study of fluidized beds, but there are additional uses in, for example, the pharmaceutical industry. Even flows in industrial processes in general can be relevant to evaluate with this technology. Partner of RISE during the development of this system has been Chalmers University of Technology (Department of Energy Technology), studying optimization of combustion processes of biofuels, and more. The technology is ripe to move on to research environments on a larger scale.
The magnetic field from a permanent magnet can be described mathematically. By measuring this field with at least two different fixed sensor modules, the position and orientation of the magnetic cursor in comparison to the sensor modules can be calculated.
The technology is suitable for applications where the cursor can be up to 1 meter from the nearest sensor module, and where surrounding metallic objects are nonmagnetic (aluminum, stainless steel, brass, etc.).
Advantages of the system are that the cursor is passive and robust (no battery or electronics), and that it is insensitive to electrically conductive material between magnet and sensor (water, metal, etc.) - unlike systems that rely on radio transmission.
RISE has together with Chalmers Energy Technology, developed technology for high-resolution 3D tracking of a particle in fluidized beds, Magnetic Particle Tracking (MPT).
Fluidized beds are used in combustion and gasification at, for example, heating plants and biogas plants, but also for synthesis of organic compounds, polymerization, pyrolysis och drying.
A fluidized bed consists of a vast amount of particles, often sand or similar. Air currents from below set the particles in motion and give liquid properties to the mass, enabling motion in the vertical direction.
The ability of fluidized test beds to efficiently convert renewable fuels such as biomass makes it an important factor in the future energy system. This ingenious method of mixing large quantities of heavy material paves the way for large-scale production of renewable heat and power, as well as CO2-neutral biofuels for the transport sector. The technology also prevents energy losses by evenly distributing the particles.
To verify theoretical models, miniaturized fluidized beds with bronze powder are used that are fluidized at room temperature by compressed air from below. These test beds are very effective tools for studying fuel mixing, by using highly accurate diagnostic methods.
By monitoring the movement of the cursor in the fluidized bed for a long time, statistics can be obtained on its movement patterns. Resolution became approx. +/- 3 mm in this project.
Brief background to project "Magnetposition" at RISE (swedish) (pdf, 428.99 KB)
Västra Götaland Region
Chalmers Tekniska Högskola