초록 ▼

An improved inductive plethysmography sensor involving a conductor having alternating active and inactive segments. The active segments preferably have a narrow diamond shape which minimizes the possibility of artifact. Because of the conductor design, the sensors can be placed completely about the

An improved inductive plethysmography sensor involving a conductor having alternating active and inactive segments. The active segments preferably have a narrow diamond shape which minimizes the possibility of artifact. Because of the conductor design, the sensors can be placed completely about the chest and abdomen with any overlap arranged so that active segments overlap inactive segments.

대표청구항 ▼

[ What is claimed is:] [1.] A self-inductance sensor for measuring the change in circumference of an object comprising:an electrical conductor having a first portion and a second portion, each portion of the conductor closely juxtaposed to the other portion forming a repetitive pattern of alternatin

[ What is claimed is:] [1.] A self-inductance sensor for measuring the change in circumference of an object comprising:an electrical conductor having a first portion and a second portion, each portion of the conductor closely juxtaposed to the other portion forming a repetitive pattern of alternating active segments and inactive segments, said active segments forming substantially enclosed areas being bounded by said first portion and by said second portion, said enclosed areas changing shape when said conductor is distended, said conductor being adapted to circumscribe the object; andmeans for measuring the self-inductance of the conductor to indicate the relative change in shape of the enclosed areas and, thus, the change in circumference of the object.