Cardio-respiration transducer

Details Cardio-respiration transducer Cardio-respiration transducer

1983-04-08

1985-04-09

Cohen, Lee S.

Surgery

Truss

Pad

128721, 128774, A61B 510

Patent

active

045095272

ABSTRACT:
A laminated, sheet-like transducer is disclosed which produces an output signal in response to changing mechanical forces applied thereto. The transducer includes a top flexible plate with a matrix of uniformly spaced-apart convex members on one surface and a bottom flexible plate with a matrix of uniformly spaced-apart convex members on one surface. The convex members on the surface of one plate are aligned with the spaces between the convex members on the surface of the other plate. A synthetic resin polymer electret film is sandwiched between the convex members of each plate and becomes deformed when the convex members press against and horizontally stretch the electret film due to the changing mechanical forces applied to the transducer. Electrodes are connected to opposite surfaces of the electret film and form, at least on one surface, a uniformly spaced-apart electrically interconnected electrode configuration. The electrodes sense the electrical charges in the electret film and produce a signal proportional to the magnitude of the changing mechanical forces which induce the electrical charges.

REFERENCES:
patent: 3760794 (1973-09-01), Basham
patent: 3836900 (1974-09-01), Mansfield
patent: 4066072 (1978-01-01), Cummins
patent: 4250415 (1981-02-01), Lewiner et al.
patent: 4320766 (1982-03-01), Alihanka et al.
patent: 4366810 (1983-01-01), Slanetz, Jr.
patent: 4438771 (1984-03-01), Friesen et al.

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