Displacement detector device and method

Details Displacement detector device and method Displacement detector device and method

1990-08-28

1992-04-28

Evans, F. L.

Surgery

Truss

Pad

128671, 128721, 128782, 25022721, 356373, A61B 508

Patent

active

051078465

ABSTRACT:
A device for detecting displacement of an object, particularly a chest belt for detecting respiration, includes an optical fibre having a light source at one end and a light-emitting face at the opposite end, a reflector device adjacent to and partially overlapping the light-emitting face of the optical fibre and movable with respect thereto to increase or decrease the amount of overlapping, a coupling for coupling the reflecting device to the object whose displacement is being detected, and a light sensor for sensing the amount of light reflected by the reflector back to the light-emitting face of the optical fibre and for outputting an electrical signal corresponding thereto.

REFERENCES:
patent: 3789667 (1974-02-01), Porter et al.
patent: 4472022 (1984-09-01), Bearcroft et al.
patent: 4543961 (1985-10-01), Brown
patent: 4611600 (1986-09-01), Cohen
patent: 4712566 (1987-12-01), Hok
patent: 4838279 (1989-06-01), Fore
patent: 4927264 (1990-05-01), Shiga et al.
patent: 4945916 (1990-08-01), Kretschmer et al.
patent: 4989612 (1991-02-01), Fore

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