Magnetoelastic torque sensor assembly
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United States of America Patent
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-
Jul 6, 2004
Grant Date -
May 27, 2004
app pub date -
Nov 22, 2002
filing date -
Nov 22, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A magnetoelastic torque sensor assembly is provided for sensing torsion load of a shaft, such as an automotive steering column. The assembly includes a molded plastic body that defines an axial channel and includes an axial opening. The assembly also includes a U-shaped lead frame that is embedded within the molded plastic body and includes side portions that extend within side sections of the molded plastic body about the channel. Magnetic flux sensors are embedded in the side sections of the molded plastic body and connected to the lead frame. For use, the shaft is radially received through the axial opening in the molded plastic body and coaxially positioned within the channel. The magnetic flux sensors are positioned about the shaft in a predetermined and fixed arrangement. The sensor array preferably includes sensors that are disposed in a plane through the axis, either diametrically opposed or axially spaced.
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