Measuring and testing – Dynamometers – Responsive to torque
Patent
1983-01-20
1984-12-18
Ruehl, Charles A.
Measuring and testing
Dynamometers
Responsive to torque
7386234, G01L 310
Patent
active
044884435
ABSTRACT:
A torque measurement system for measuring shaft torque has two toothed wheels mounted in spaced apart relationship. Each of the wheels has a plurality of axially extending spaced teeth along its periphery extending into spaces between the teeth of the other, forming an interlaced array of teeth having tooth spacing interstices therebetween. A discontinuity is provided in the tooth pattern at at least one location around the periphery of the two wheels to serve as an index marker. A single detector such as a variable relunctance sensor is mounted proximate the wheels to provide output signals representative of circumferential widths of tooth spacing interstices and also representative of the index marker. The widths of the interstices change upon shaft torque deflection, and signals from the sensor are processed to produce a DC signal proportional to torque. The two wheels can be offset in a noload condition so that adjacent tooth spacing interstices are approximately equal in a torque deflection range of interest.
REFERENCES:
patent: 3194065 (1965-07-01), Wilson
patent: 3208274 (1965-09-01), Rosaler
patent: 3273386 (1966-09-01), Sipler
patent: 3548649 (1970-12-01), Parkinson
patent: 3762217 (1973-10-01), Hagen
patent: 4208904 (1980-06-01), Schindler
Giebel James R.
Ruehl Charles A.
Simmonds Precision Products Inc.
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