Measuring and testing – Dynamometers – Responsive to multiple loads or load components
Patent
1989-02-10
1990-03-27
Ruehl, Charles A.
Measuring and testing
Dynamometers
Responsive to multiple loads or load components
7386266, G01L 516, G01L 122
Patent
active
049110241
ABSTRACT:
A force/torque transducer including a first rigid member, a second rigid member, one or more flexural beams connected between the first rigid member and the second rigid member, the first and second members and the beam having a center point, the flexural beams having respective decoupling points that are symmetrical with respect to the center point, the flexural beams having symmetrical strain fields located on the flexural beams such that first and second strain fields achieve strain responses to a load of a single axis of magnitude equal to each other and third and fourth strain fields achieve strain responses to the load of the single axis of magnitude equal to each other, two of the responses being one sign and two being the other sign, the strain responses of the strain fields to loads of all other axes being capable of being cancelled out when the responses of one of the first and second fields and one of the third and fourth fields are given opposite sign and the responses of like axes are added together, strain gauges placed at the first, second, third and fourth strain fields, and a bridge circuit in which the strain gauges are electrically connected to be additive with respect to the load of the single axis and neutral with respect to loads of all other axes, the bridge circuit providing an output that indicates load of the single axis and is decoupled with respect to loads of all other axes.
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Barry Wright Corporation
Ruehl Charles A.
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