| Zugriffsnummer | 34752 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | A novel test ground for the equipment qualification of magnetic gradient sensors used for unexploded bomb detection |
| Autor(in); Institution |
Hiergeist, Robert; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig; Magnet Physik Dr. Steingroever GmbH, Köln, GERMANY
Ketzler, Rainer; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Harcken, Hans; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Lüdke, Joachim; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Albrecht, Martin; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Brand, Thomas; SENSYS GmbH, Bad Saarow (Neu Golm), GERMANY
Fischer, Andreas; SENSYS GmbH, Bad Saarow (Neu Golm), GERMANY
|
| Quelle/Jahr | Journal of Applied Geophysics: 112 (2015), 242 - 248 |
| ISSN | 0926-9851 |
| DOI | |
| Verlag | Amsterdam [u.a.]: Elsevier |
| Freie Schlagworte | Unexploded bombs ; Equivalent current shell ; Solenoids ; Multi-layer split coils ; Field calculations ; Elliptic integrals |
| Zusammenfassung | Scanning of the ground level by magnetic gradient sensors (fluxgate sensors) is the primary detection technique for unexploded bombs (UXBs). In order to allow a classification of the test equipment (magnetic sensors and associated evaluation software) as well as training and examination of the skills of sensor operating teams we built up a test facility. In a first step to generate the stray magnetic fields of UXBs, we positioned solenoids of the same dimension as the simulated bombs under a test ground using the principle of the equivalent current shell. From numerical investigations it has been found, that for depths exceeding 1.2 m, the gradient field profiles of these solenoids and the gradient field profiles of small multi-layer split coils agree very well (far field regime). This was verified later on experimentally: By positioning these movable small multi-layer split coils in tubes running diagonally underneath the test ground and controlling the current flowing through these coils, we were able to find a good agreement between calculated and experimental data of the gradiometer signal scans on the measurement plane for (i) tests of the signal resolution and (ii) for tests of the relative spatial resolution of the gradient sensors. |
Zitierung
Hiergeist, R., Ketzler, R., Harcken, H., Lüdke, J., Albrecht, M., Brand, T., & Fischer, A. (2015). A novel test ground for the equipment qualification of magnetic gradient sensors used for unexploded bomb detection. Journal of Applied Geophysics, 112, 242–248. https://doi.org/10.1016/j.jappgeo.2014.12.003