Magnetostrictive sensor with uniform stress

摘要

In one embodiment, a sensor assembly has a sensor housing forming a fluid chamber (28) having a surface (21) defining a normal axis. A magnetostrictive (MS) core (18, 38) that defines a central longitudinal axis is subjected to stress induced by pressurized fluid in the chamber. An excitation coil (22, 40) is coupled to the core (18, 38) to induce a magnetic flux therein. The central longitudinal axis of the core (18, 38) is coaxial with the axis normal to the fluid chamber surface (21).