SENSOR DEVICE FOR DETECTING DISPLACEMENTS OF HUMAN'S BODY SURFACE ACCOMPANYING RESPIRATION
First Claim
1. A sensor device, attached to a body surface of a subject and detecting displacements of the body surface accompanying respiration of the subject, comprising:
- a contact piece having a contact surface which contacts the body surface when the sensor device is attached to the body surface;
a displacement-signal convertor which is linked to the contact piece and converts the displacements of the body surface into electrical signals; and
an outputting device which outputs the electrical signals to an external unit;
wherein the contact surface of the contact piece is a curved surface projecting outward in a direction from its periphery to its center.
1 Assignment
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Accused Products
Abstract
In a sensor device which detects pressure variations owing to displacements of a body surface of a subject by respiration through variations of the output impedance of a piezoelectric vibrator, the pressure variations owing to displacements can be more efficiently transmitted to the piezoelectric vibrator. The sensor device, attached to a subject'"'"'s body surface and detecting displacements of the body surface accompanying respiration of the subject, comprises a contact piece having a contact surface which contacts the body surface when the sensor device is attached to the body surface; a displacement-signal convertor which is connected with the contact piece and converts the displacements of the body surface into electrical signals; and an outputting device which outputs the electrical signals to an external unit; wherein the contact surface of the contact piece is a curved surface projecting outward in a direction from its periphery to its center.
7 Citations
8 Claims
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1. A sensor device, attached to a body surface of a subject and detecting displacements of the body surface accompanying respiration of the subject, comprising:
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a contact piece having a contact surface which contacts the body surface when the sensor device is attached to the body surface; a displacement-signal convertor which is linked to the contact piece and converts the displacements of the body surface into electrical signals; and an outputting device which outputs the electrical signals to an external unit; wherein the contact surface of the contact piece is a curved surface projecting outward in a direction from its periphery to its center. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification