University of Dayton

James R Sebastian

George A Hartman

David A Stubbs

Rollie E Dutton

The present invention provides a sensor that can be operated at high temperatures. The sensor comprises a first electrode, a second electrode, and an aluminum nitride film which lies between the first and second electrode. The sensor can be used to measure pressure, acceleration, or force at high temperatures.

High temperature piezoelectric sensor

A magnetostrictive actuator is provided comprising an actuator base, a magnetostrictive assembly, an actuator frame, and a flexible disk. The magnetostrictive assembly includes a magnetostrictive element. A first end of the magnetostrictive element is mechanically coupled to the actuator base. A first portion of the actuator frame is mechanically coupled to the actuator base. The flexible disk includes a perimetrical disk portion and a bearing surface portion. The perimetrical disk portion is mechanically coupled to the second frame portion and the bearing surface portion is mechanically coupled to the second magnetostrictive element end portion. The magnetostrictive actuator comprises a magnetostrictive material portion and a plurality of cooling fluid bores formed within the magnetostrictive material portion. Further, the magnetostrictive actuator may comprise an epoxy matrix, a plurality of cooling fluid bores formed within the epoxy matrix, and a plurality of magnetostrictive rods formed within the epoxy matrix.

Magnetostrictive actuator

A mechanical test system is provided comprising a primary actuator arranged so as to create mechanical movement of a first specimen holder along an axis of actuation and an oppositely oriented secondary actuator arranged so as to create mechanical movement of a second specimen holder along the axis of actuation. The magnetostrictive actuator comprises a magnetostrictive assembly including a magnetostrictive element and a flexible disk mechanically coupled to the magnetostrictive element. The magnetostrictive element comprises either a magnetostrictive material portion with a plurality of cooling fluid bores formed within the magnetostrictive material portion or an epoxy matrix with a plurality of cooling fluid bores and a plurality of magnetostrictive rods formed within the epoxy matrix.

Growing community of inventors

Kettering, OH, United States of America

James R Sebastian