Positioning and abnormality control device

Details Positioning and abnormality control device Positioning and abnormality control device

1986-07-24

1988-07-12

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

340672, 34087016, 34087029, G05B 2502, G05B 2100

Patent

active

047573139

ABSTRACT:
A positioning control device wherein an abnormality in a position detector is judged only by use of two position signals having differing phases emitted from the position detector for effecting position detection of a movable article without using the data of movement of the movable article to be controlled. For this purpose, direction determining means are provided which are responsive to the position signals to provide normal or reverse direction signals. A logical circuit for effecting abnormality judging of the position detector is provided in a controller for emitting a position control signal corresponding to the position signal to a control circuit for effecting position control of the movable article. When an abnormal condition occurs in the position detector, the signal aspect of the position signal emitted from the position detector is varied from that during the normal operation.

REFERENCES:
patent: 3490010 (1970-01-01), Bernard et al.
patent: 3514627 (1970-08-01), Bridgeman
patent: 3551649 (1970-12-01), Weber
patent: 4321531 (1982-03-01), Marshall
patent: 4339749 (1982-07-01), Yamada
patent: 4349814 (1982-09-01), Akehurst
patent: 4366705 (1983-01-01), Fuji et al.
patent: 4401930 (1983-08-01), Kato et al.
patent: 4591770 (1986-05-01), Isobe et al.
"Circuit Indicates Direction of Rotation", W. Dorset, Electronic Product Design, Jun. 1981, p. 29.

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