Transducer
AssigneeTexas Instruments Incorporated
InventorsErnest M. Jost, Arthur L. Reenstra, George Trenkler
Life of this patent
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Abstract
A magnetostrictive pressure transducer is disclosed wherein pressure in the range of 0 to 1000 psi can be accurately measured. The pressure transducer apparatus includes a diaphragm causing the pressure to be applied unidirectionally on sensor material having the property of undergoing changes in magnetic induction when a pressure is applied thereto, the change in magnetic induction being related to the applied pressure. The change in magnetic induction is measured and thus provides a measurement of the applied pressure. Several embodiments are also disclosed for measuring vacuum. In these embodiments force is also applied unidirectionally on the sensor material.
Claims17
A pressure sensor comprising:
- a member having a longitudinal axis composed of magnetic material, the member having first and second ends,
- an electrical coil disposed about the member intermediate the ends thereof,
- a generally U-shaped yoke having first and second legs connected by a bight portion, the legs having free distal end portions in magnetic communication with the member, slots are provided in the free distal ends of the first and second legs of the yoke and the member is received in the slots, and
- means to provide an axial force along the longitudinal axis of the member.
A pressure sensor comprising:
- a member having a longitudinal axis composed of magnetic material, the member configured as a scroll having first and second ends,
- an electrical coil disposed about the member intermediate the ends thereof,
- means defining a magnetic path in magnetic communication with the member, and
- means to provide an axial force along the longitudinal axis of the member.
Dependencies are inferred from the claim text.