Use of vehicle magnetic signatures for position estimation

S. Taghvaeeyan, R. Rajamani

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


This letter analyzes the magnetic signatures of cars and investigates the use of anisotropic magnetoresistive sensors to estimate the relative position of a vehicle from its magnetic signature. Theoretical analysis and experimental measurements both show that vehicle magnetic field has a first order inverse relationship with distance at small distances. However, the parameters in the magnetic field-distance relationship vary significantly with the type and size of car. A sensor system consisting of 2 magnetoresistive sensors and an extended Kalman filter can adaptively estimate these parameters in real-time. Experimental results from tests with various vehicles show that the developed sensor system can reliably estimate vehicle distance from magnetic field measurements.

Original languageEnglish (US)
Article number134101
JournalApplied Physics Letters
Issue number13
StatePublished - Sep 26 2011

Bibliographical note

Funding Information:
The authors thank the ITS-Institute at the University of Minnesota for funding this research.


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