Position transducer for a rotating member

Details Position transducer for a rotating member Position transducer for a rotating member

1980-05-16

1981-10-27

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, 250239, G01D 534

Patent

active

042975735

ABSTRACT:
An angular position transducer for a rotating member comprising a notched disc connected to said member, an opto-electronic pair for sensing the angular position of said disc and a supporting shell for said pair which is fixable on the support of the rotating member coaxially to said member. The disc is fixable directly to the rotating member at a predetermined position with respect to the shell, and comprises a thin flexible lamina guided on its periphery by a guiding element adjacent to the notches. The flexibility of the lamina compensates for any disalignment and axial displacement of the rotating member. The position signal is periodic and is sent to the terminals of a reference resistor. A control circuit modifies the value of the resistor in order to stabilize the peak value of the position signal within predetermined narrow tolerance limits.

REFERENCES:
patent: 3400275 (1968-09-01), Trump
patent: 3728551 (1973-04-01), Culver et al.
patent: 4152589 (1979-05-01), Mitchell

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