Patent ID: 8653810
Filing Date: 2014-02-18
Classification: G01R,H05K,Y10T

Abstract:
1. A printed circuit board (PCB) magnetostrictive (MS) sensor comprising: a first direct current (DC) bias PCB layer comprising a first plurality of conductive traces; a first alternating current (AC) PCB layer disposed on said first DC bias PCB layer, said first AC PCB layer comprising a first AC coil; a pocket PCB layer disposed on said first AC PCB layer, said pocket PCB layer to receive a strip of MS material; a second AC PCB layer disposed on said pocket PCB layer, said second AC PCB layer comprising a second AC coil; and a second DC bias PCB layer disposed on said second AC PCB layer, said second DC bias PCB layer comprising a second plurality of conductive traces, wherein traces from said first plurality of conductive traces are electrically coupled to traces from said second plurality of conductive traces, such that said electrically coupled traces are configured as a DC bias winding that circumferentially encompasses said first AC coil, said strip of MS material and said second AC coil.