Modeling of an electromagnetic geophone with passive magnetic spring

A.J.J.A. Oome, J.L.G. Janssen, L. Encica, E.A. Lomonova, J.A.A.T. Dams

Research output: Contribution to journalArticleAcademicpeer-review

26 Citations (Scopus)
3 Downloads (Pure)


This paper presents an analysis of a novel, patent pending [Magnetic Innovations,], absolute velocity sensor, or geophone. Conventional geophone topologies are discussed and their intrinsic physical limitations, given by the mechanical construction, are shown. Therefore, a new topology with passive magnetic spring is proposed. A unified semi-analytical solution for the magnetic field equations is derived in cylindrical coordinates and used to determine the static response characteristics of the proposed geophone configuration. Furthermore, a prototype is built and measurements are performed and analyzed to obtain the dynamic behavior. A further improvement of the novel geophone is proposed by means of optimization using finite element analysis
Original languageEnglish
Pages (from-to)142-154
Number of pages13
JournalSensors and Actuators, A: Physical
Issue number2
Publication statusPublished - 2009


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