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Prof. Dr.-Ing. habil. Jens Haueisen
Director of the BMTI Institute and head of Biomedical Engineering Group
Prof. Dr.-Ing. habil. Jens Haueisen
phone: +49 3677 69 2861
In this project, a new method to analyse the ground for building measures is developed. It bases on geomagnetic prospection, whereas the gradient of the magnetic field of the earth is measured and mapped over the area of interest. The designed measurement system utilises the currently most sensitive type of gradiometer sensors: Superconducting Quantum Interference Devices (SQUIDs). Due to their extremely high sensitivity in comparison to conventional gradiometers, local changes of the magnetic field of the earth that arise by different susceptibilities of the underground can be resolved with high precision. Such changes are caused by the geological properties and condition of the underground, but also by cavities or buried objects. By using two vertically arranged gradiometers, depths information of the objects that produce the anomalies in the magnetic field are obtained. The measurement system is conjointly developed at the IPHT Jena and the Supracon AG Jena.
The result of the magnetic field mapping, which is an assignment of the measured gradients to the prospective building ground with a precision of a few centimetres, has to be processed further to extract application relevant data. The required software methods are developed by the Friedrich Schiller University Jena and the University of Technology Ilmenau. Thereby, two different approaches are pursued: a pattern recognition approach of artificial neural networks and source localisation methods that use the measured magnetic signals. Finally, JenControl realises an efficient software implementation of the developed algorithms and a user interface for handling large volumes of data.