Measuring and testing – Dynamometers – Responsive to torque
Patent
1984-12-03
1986-07-29
Ruehl, Charles A.
Measuring and testing
Dynamometers
Responsive to torque
364506, G01L 310
Patent
active
046025154
ABSTRACT:
The radial dimension of selected teeth in toothed wheels used for measuring the transmitted shaft torque are changed in a predetermined spatial pattern corresponding to desired information. Such embedded data structures within the torque measurement apparatus may be used for encoding data uniquely related to the shaft twist modulus of a particular torque meter. In this manner, the toothed torque and/or reference wheels may be used to "self-compensate" or "program" appropriate electronic signal processing apparatus so as to automatically take the particular shaft twist modulus fully into account before producing output torque measurement data. At the same time, the use of such different radial tooth dimensions provides a differential amplitude modulation component in the sensor output signal which may be used to sense the relative gap dimensions (i.e., between rotating toothed wheels and a variable reluctance sensor) such that this variable parameter can also be taken fully into account by the signal processing electronics before a final output torque measurement signal is produced. Compensation for shaft speed and sensor temperature variations may also be achieved so as to result in final measured torque output data automatically compensated for variations in shaft modulus, gap, speed and temperature.
REFERENCES:
patent: 3548649 (1970-12-01), Parkinson
patent: 4020685 (1977-05-01), Van Millingen et al.
patent: 4444063 (1984-04-01), Snowden et al.
patent: 4488443 (1984-12-01), Parkinson
Ruehl Charles A.
Simmonds Precision Products Inc.
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