Magnetic Signature Characteristics Investigation
Interim rept. May 1972-Jun 1973
ARMY MOBILITY EQUIPMENT RESEARCH AND DEVELOPMENT COMMAND FORT BELVOIR VA
Pagination or Media Count:
The report addresses four magnetic signature characteristics of interest to the countermine problem the magnetic signatures of vehicles, sensors employed by magnetic fuzes, a theoretical model of vehicles, and development of fundamental aspects of countermeasure theory to defeat magnetic fuzes. The physical phenomena of the inherent and induced magnetic dipole moments of ferromagnetic objects are discussed in relation to the origin of magnetic signature features. The sensors employed to detect these objects are classified into two categories those measuring absolute flux and those sensitive to flux-rate changes. To develop a basis for dealing with the gross features of ferromagnetic objects or vehicles and relate them to signatures, a theoretical model based on the dipole moment characteristics of magnetic material is developed. Experimental data obtained as part of this investigation shows general agreement with the basic features of the model. Intrinsic magnetic signature parameters are identified within the model and experimental data base. Each of the parameters is bracketed by calculations and field measurements to determine a range of values available for fuze design and consequently to CM techniques. The relative merits of using large ferromagnetic masses, permanent magnets, and electromagnetic coils are discussed as potential countermeasure tools.
- Military Operations, Strategy and Tactics