Heart beat/respiration measuring device

• US 7,052,469 B2
• Filed: 11/19/2003
• Issued: 05/30/2006
• Est. Priority Date: 11/25/2002
• Status: Expired due to Fees

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Minamiura, Takeshi, Sakai, Hidetaka, Sakaguchi, Akira
• Primary Examiner(s): Nasser, Robert L.
• Application Number:
  US10/707,070
• Publication Number:
  US 20040111039A1
• Time in Patent Office: 923 Days
• Field of Search: 600529-538, 600481-503
• US Class Current: 600/534
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/02444 Details of sensor A61B5/02427 takes precedence
• CPC Class Codes: A61B 5/113 occurring during breathing
• CPC Class Codes: A61B 5/6887 mounted on external non-worn devices, e.g. non-medical devices

Abstract

A heart beat/respiration measuring device comprising a sensor adapted to be pressed against the human body, and a measuring circuit for measuring heart beats and respiration from the output of the sensor. The sensor includes a coil member elastically deformable when subjected to pressure by being pressed against the human body. The measuring circuit comprises an LC oscillation circuit wherein an inductance component and a capacitance component of the coil member serve respectively as a coil L and a capacitor C for oscillation, and a calculation processing circuit for detecting variations in the oscillation frequency of the LC oscillation circuit and calculations of a cardiac cycle, heart rate, respiratory cycle and respiration rate based on the frequency components of heart beats and respiration are included in the variations.

Claims

1. A heart beat/respiration measuring device comprising:

a mat;

a sensor (2) disposed in a recess in said mat and adapted to be pressed against a human body as the human body lies on said mat; and

a measuring circuit for measuring heart beats and/or respiration from the output of the sensor (2),

the sensor (2) comprising a coil member comprising a wire wound around an elastic member having a hollow portion and being elastically restorably deformable with subjected to pressure by being pressed against the human body, and

the measuring circuit comprising an LC oscillation circuit (3) wherein an inductance component and a capacitance component of the coil member serve respectively as a coil L and a capacitor C for oscillation, and a calculation processing circuit (4) for detecting variations in the oscillation frequency of the LC oscillation circuit (3) and calculating physiological data in accordance with heart beats and/or respiration based on the frequency component or components of heart beats and/or respiration included in the variations.

2. A heart beat/respiration measuring device according to claim 1, wherein the sensor (2) is installed in a posture in which the pressure acts in a direction orthogonal to a winding axis of the coil member.

3. A heart beat/respiration measuring device according to claim 1, wherein the sensor (2) is installed in a posture in which the pressure acts in a direction along a winding axis of the coil member.