Patents Assigned to Sonic Force Corporation
  • Patent number: 5503020
    Abstract: An improved electromagnetic acoustic transducer (EMAT) for transmitting and receiving signals within an electrically conductive structure, a method of fabricating the same, and a method of generating and detecting acoustic waves in an electrically conductive structure are provided. The EMAT includes a source of magnetic flux for establishing a static magnetic field in the electrically conductive structure, and a multilayered printed circuit board (PCB) positioned within the static magnetic field in close proximity to the surface of the electrically conductive structure. The multilayered PCB includes a plurality of coil layers, an interconnect layer, and a ground plane. When an alternating current is applied, the coil layers induce eddy currents in the conductive structure. The source of magnetic flux and the multilayered PCB are oriented such that the vector product of the magnetic field and the eddy currents produce an instantaneous force field in the electrically conductive structure.
    Type: Grant
    Filed: July 1, 1994
    Date of Patent: April 2, 1996
    Assignee: Sonic Force Corporation
    Inventor: Efrain A. Mandracchia