公开(公告)号：GB2487963A

公开(公告)日：2012-08-15

申请号：GB201102416

申请日：2011-02-10

Applicant: BAE SYSTEMS PLC

Inventor： ROWSE DAVID PAUL ,  PANITZ MARK ,  JONES CHRISTOPHER CHARLES RAWLINSON ,  SILLENCE COLIN DAVID ,  GOUGH DAVID WILLIAM

IPC: G01V3/08

Abstract: A method and apparatus for imaging hidden objects are provided. The apparatus comprises an array of magnetic field inducing elements 1 so that the array produces a combined magnetic field 3 resulting from a combination of the element fields. The combined magnetic field 3 is projected from the apparatus into an adjacent space and through a barrier or shield hiding the object. The apparatus includes means to sense a change in magnetic susceptibility of the field caused by the presence of an object in the field. Mapping of the changes in susceptibility onto individual elements in the array enables a visual image of the object to be created. The array may be a linear Halbach array of electromagnets. The strength of the field of each element may be varied in order to vary the sensitivity of the apparatus and the distance from the apparatus at which the object is detected.