Organism information measuring device and organism information measuring method

• US 20050253047A1
• Filed: 05/03/2005
• Published: 11/17/2005
• Est. Priority Date: 05/17/2004
• Status: Active Grant

• Current Assignee: Seiko Instruments Incorporated (Seiko Group)
• Original Assignee: Seiko Instruments Incorporated (Seiko Group)
• Inventors: Nakamura, Takashi, Moriya, Koichi, Miyahara, Shinichiro, Maegawa, Kazuya
• Granted Patent: US 7,060,963 B2
• Time in Patent Office: Days
• US Class Current: 250/221
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/681 Wristwatch-type devices
• CPC Class Codes: A61B 5/7257 using Fourier transforms

Abstract

To improve an S/N ratio and increase a measurement accuracy of an organism information. There is provided an organism information measuring device possessing a main body disposed under a state that its lower face has contacted with an organism surface, a light irradiating part which is disposed in the lower face of the main body and irradiates a light toward an organism, a 1st light receiving part which is disposed in the lower face of the main body and near the light irradiating part, receives a backward scattered light from the organism and generates an organism information signal complying with a received light quantity, a 2nd light receiving part which is disposed in the lower face of the main body and in a position spaced from the light irradiating part more than a distance between the 1st light receiving part and the light irradiating part, receives a backward scattered light from the organism and generates an organism information signal complying with a received light quantity, and an organism information operating part which calculates an organism information on the basis of the organism information signals having been generated by the 1st light receiving part and the 2nd light receiving part.

Claims

1. An organism information measuring device comprising:

a main body disposed under a state that its lower face has contacted with an organism surface;

a light irradiating part which is disposed in the lower face of the main body and irradiates a light toward an organism;

a 1st light receiving part which is disposed in the lower face of the main body and near the light irradiating part, receives a backward scattered light from the organism and generates an organism information signal complying with a received light quantity;

a 2nd light receiving part which is disposed in the lower face of the main body and in a position spaced from the light irradiating part more than a distance between the 1st light receiving part and the light irradiating part, receives a backward scattered light from the organism and generates an organism information signal complying with a received light quantity; and

an organism information operating part which operates an organism information on the basis of the organism information signals having been generated by the 1st light receiving part and the 2nd light receiving part.

2. An organism information measuring device accordin to claim 1, wherein the light irradiating part possesses a 1st light irradiating part for detecting a noise and a 2nd light irradiating part for detecting an organism information, each of which irradiates a light different in wavelength, and

between both the light irradiating parts, the 1st light irradiating part utilizes a light whose wavelength is short and the 2nd light irradiating part utilizes a light whose wavelength is long.

3. An organism information measuring device according to claim 2, wherein the 2nd light receiving part is disposed at a distance in which the light irradiated from the 1st light irradiating part does not directly enter.

4. An organism information measuring device according to claim 1, wherein the 2nd light receiving part is set such that a light receiving area increases in compliance with a distance spacing from the light irradiating part.

5. An organism information measuring device according to claim 1, wherein the 1st light receiving part is provided in plural pieces, and

the organism information operating part utilizes any one or an average value of the organism information signals having been generated by the plural 1st light receiving parts.

6. An organism information measuring method comprising:

a lighting process which a light is irradiated from a light irradiating part toward an organism;

a light receiving process which a backward scattered light from the organism is received in two places of a 1st light receiving part disposed near the light irradiating part and a 2nd light receiving part spaced from the light irradiating part more than a distance between the 1st light receiving part and the light irradiating part;

a measuring process which an organism information is measured on the basis of received light results of both the light receiving parts;

a transformation process in which, from the backward scattered light received by the 1st light receiving part and the 2nd light receiving part, organism information signals complying with a received light quantity are respectively generated and the organism information signals are high-speed-Fourier-transformation-processed; and

an operation process in which values transformed by the transformation process are normalized by a power spectrum of optional frequency and the organism information is operated by mutually subtracting the normalized values.