Detector

• US 20070060807A1
• Filed: 08/22/2006
• Published: 03/15/2007
• Est. Priority Date: 08/26/2005
• Status: Abandoned Application

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Oishi, Yoshihiro
• Application Number:
  US11/507,541
• Publication Number:
  US 20070060807A1
• Time in Patent Office: Days
• US Class Current: 600/322
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/6838 Clamps or clips

Abstract

A pair of light-receiving sections are placed at positions symmetric to a light-emitting axis of a light-emitting section on the inner circumferential surface in close contact with a finger, and each light-receiving section is composed of a plurality of light receiving regions so that by selecting a signal of the light receiving region which maximizes a reception signal, the propriety and the correction direction of a wearing position are displayed. According to the ring sensor, it becomes possible to enhance light-receiving efficiency of the light-receiving section and to increase a signal-noise ratio. It also becomes possible to facilitate wearing of the ring sensor at an optimum position.

Claims

1. A detector, comprising:

a light-emitting section for radiating light; and

a light-receiving section for receiving light, the light-emitting section and the light-receiving section being formed on an inner circumferential surface of a finger ring-type ring,

wherein the light-receiving section is composed of at least a first light-receiving section and a second light-receiving section, and

wherein each light-receiving section is placed at a position symmetric to a light-emitting axis of the light-emitting section.

2. The detector according to claim 1, comprising:

a comparing section for comparing first and second reception signals outputted from the first and second light-receiving sections;

a selecting section for selecting any one of the first reception signal, the second reception signal, and a sum of the first and second reception signals based on a comparison result in the comparing section; and

a signal processing section for calculating biological information from the reception signal selected in the selecting section.

3. The detector according to claim 2,

wherein propriety of a wearing position is determined based on the comparison result.

4. The detector according to claim 1,

wherein the first and second light-receiving sections have a plurality of light-receiving regions along the inner circumferential surface.

5. The detector according to claim 4,

wherein the respective light-receiving sections have at least three light-receiving regions, and

wherein light-receiving regions each positioning in central portions of the respective light-receiving sections are placed at positions facing each other on the inner circumferential surface.

6. The detector according to claim 4,

wherein the first and second reception signals outputted from the first and second light-receiving sections are signals having a maximum amplitude among reception signals of the respective light-receiving regions, and propriety of a wearing position is determined by a combination of the light-receiving regions corresponding to the first and second reception signals.

7. The detector according to claim 5,

wherein the first and second reception signals outputted from the first and second light-receiving sections are signals having a maximum amplitude among reception signals of the respective light-receiving regions, and propriety of a wearing position is determined by a combination of the light-receiving regions corresponding to the first and second reception signals.

8. The detector according to claim 6 or 7,

wherein a correction direction of the wearing position is determined based on the combination.

9. The detector according to claim 6, comprising a signal processing section for calculating biological information from the reception signals selected based on the combination.

10. The detector according to claim 7, comprising a signal processing section for calculating biological information from the reception signals selected based on the combination.

11. The detector according to claim 1,

wherein the light-receiving axis of the light-receiving section and the light-emitting axis of the light-emitting section are in one plane.

12. The detector according to claim 1,

wherein a light-emitting point of the light-emitting section and a light-receiving point of the light-receiving section are placed at different tracks on the inner circumferential surface.

13. The detector according to claim 12,

wherein the light-emitting axis and the light-receiving axis are placed so as to intersect with each other.

14. The detector according to claim 1,

wherein the first light-receiving section and the second light-receiving section are placed at positions facing each other on the inner circumferential surface.

15. The detector according to claim 2, comprising an amplifier for amplifying a reception signal outputted from the light-receiving sections,

wherein an amplification factor of the amplifier is adjusted based on the reception signal inputted into the signal processing section.

16. The detector according to claim 2,

wherein the biological information calculated from the reception signal by the signal processing section is a pulse or oxygen saturation in blood.