Apparatus and method for measuring torque and power

Details Apparatus and method for measuring torque and power Apparatus and method for measuring torque and power

1996-10-21

1998-01-06

Dougherty, Elizabeth L.

Measuring and testing

Dynamometers

Responsive to torque

7386228, G01L 122

Patent

active

057057575

ABSTRACT:
An apparatus and method for measuring torque imposed on a drive shaft and horsepower transmitted to a drive shaft are provided. The apparatus includes four strain gauges mounted onto the drive shaft. The strain gauges are connected to a transmitter which is accommodated within a rotating collar mounted onto the drive shaft. The changes in resistances of the strain gauges are then transmitted by the transmitter to a receiver. Strain level is then calculated from the measurement of the changes in resistivity and torque may be calculated from the strain level calculation. A means for measuring rpm or rotational velocity is provided which, in combination with the torque calculation, results in a means for calculating the power transmitted to the drive shaft.

REFERENCES:
patent: 2949029 (1960-08-01), Bayles et al.
patent: 3201982 (1965-08-01), Kennedy
patent: 3251223 (1966-05-01), Barg
patent: 3555894 (1971-01-01), Bratkowski
patent: 3691825 (1972-09-01), Dyer
patent: 3728896 (1973-04-01), Sheldon et al.
patent: 3950986 (1976-04-01), Parkinson
patent: 4530248 (1985-07-01), Munson
patent: 4763533 (1988-08-01), Uitermarkt

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