Magnetic force sensor and control circuit for same

Details Magnetic force sensor and control circuit for same Magnetic force sensor and control circuit for same

2005-09-13

2005-09-13

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Dynamometers

Responsive to force

Reexamination Certificate

active

06941824

ABSTRACT:
A magnetic force sensor and method for measuring a force applied to an object. A magnetostrictive element mounted on at least a portion of the object is subjected to a prestress. A conductive coil is wound around at least a portion of the magnetostrictive element. An excitation source, which includes one of a current source and a voltage source, excites the conductive coil. A detection circuit detects one of an induced voltage across the conductive coil and a voltage drop across a resistor in series with the conductive coil. The detected voltage can be used to determine the applied force. A second coil can be used in a bipolar sensor or to correct for variations in ambient conditions.

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