Measuring the angular position of a shaft

Details Measuring the angular position of a shaft Measuring the angular position of a shaft

1973-11-08

1976-07-13

Schaefer, Robert K.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

318630, 318675, 73418, G05D 1600

Patent

active

039696626

ABSTRACT:
A system for measuring the rotation of a shaft without direct mechanical connection to it uses a digital system to maintain a second shaft that connects to a cylindrical chart recorder in a constant angular position relationship with the measured shaft. Two limit switches on the recorder shaft sense the rotation of a reference point on the measured shaft beyond a range defined by the location of the limit switches. A stepper motor driven by digital power supply incrementally rotates the recorder shaft to move a reference point on the recorder shaft back into alignment with the reference point on the measured shaft. A digital counter controls the number of pulses supplied by the power supply to stop the recorder shaft in the aligned position.

REFERENCES:
patent: 2035602 (1936-03-01), Hubbard
patent: 2927257 (1960-03-01), Senseney
patent: 3020458 (1962-02-01), Morgan
patent: 3114089 (1963-12-01), Mulligan
patent: 3395323 (1968-07-01), Peters
patent: 3560830 (1971-02-01), Steinberg

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