Researchers at NUST MISIS have developed a mathematical model that enhances the precision of giant magneto-impedance (GMI) sensors. By integrating software-based temperature compensation, the team reduced measurement errors by more than 80 times. The technology allows sensors to maintain high accuracy across an industrial temperature range of -50 to +80 degrees Celsius.
The system utilizes a miniature temperature sensor placed alongside the GMI device. An algorithm processes the data in real-time to adjust results based on thermal fluctuations. This approach requires minimal computational resources, enabling the software to run on compact microcontrollers suitable for portable industrial equipment.
The sensors are designed for non-destructive testing, including the detection of micro-cracks in buildings and metal structures. The technology has already undergone successful field testing by the Russian Ministry of Emergency Situations. Researchers are now working to expand the calibration range to cover temperatures from -50 to +100 degrees Celsius.
The project was conducted by a team from NUST MISIS, MEPhI, and the Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation. The findings were published in the Journal of Magnetism and Magnetic Materials. The development was supported by the Priority-2030 program and the NUST MISIS engineering center.
