Measuring and testing – Dynamometers – Responsive to torque
Patent
1988-08-04
1990-03-20
Ruehl, Charles A.
Measuring and testing
Dynamometers
Responsive to torque
G01L 310
Patent
active
049090887
ABSTRACT:
An apparatus is provided for use with non-contacting torque sensors. The accuracy of non-contacting torque sensors depend upon the uniformity of the air gap between a stress detecting member and a stressed member, for instance, an inductive coil structure disposed about a shaft which exhibits changes in magnetic permeability in response to torque on the shaft. Mounting schemes for bulky inductive coil structures do not provide a uniform air gap, and an inaccurate torque sensor results. As a solution, a mounting apparatus uses a tube concentrically disposed about a shaft at a predetermined distance therefrom, and a flexible sensor structure disposed about the tube. The small, efficient tube and sensor structure may be held to strict manufacturing and mounting tolerances. The apparatus is principally used to sense the torque on a shaft, such as that used in an automobile or work vehicle.
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Caterpillar Inc.
Fletcher Michael G.
Jeang Wei Wei
Muir Robert E.
Ruehl Charles A.
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