Method and apparatus for measuring biological condition
First Claim
1. A biological condition measuring apparatus for measuring a biological condition of a living body, said apparatus comprising:
- a light emitting unit configured to emit individually first and second lights to a measurement portion of the living body, said first and second lights having first and second wavelengths, respectively, said first and second wavelengths being different from each other;
a light receiving unit configured to receive first and second reflection lights to generate first and second detection signals based on the first and second reflection lights, respectively, said first reflection light being based on the first light reflected from the measurement portion, said second reflection light being based on the second light reflected from the measurement portion, said first and second detection signals having different characteristics from each other due to the difference between the first and second wavelengths; and
a measuring unit configured to measure the biological condition based on the different characteristics of the first and second detection signals.
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Accused Products
Abstract
In an apparatus for measuring a biological condition of a living body, a light emitting unit emits individually first and second lights to a measurement portion of the living body. The first and second lights have first and second wavelengths, respectively. The first and second wavelengths are different from each other. A light receiving unit receives first and second reflection lights to generate first and second detection signals based on the first and second reflection lights, respectively. The first and second reflection lights are based on the first light reflected from the measurement portion and the second light reflected therefrom, respectively. The first and second detection signals have different characteristics from each other due to the difference between the first and second wavelengths. A measuring unit measures the biological condition based on the different characteristics of the first and second detection signals.
134 Citations
34 Claims
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1. A biological condition measuring apparatus for measuring a biological condition of a living body, said apparatus comprising:
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a light emitting unit configured to emit individually first and second lights to a measurement portion of the living body, said first and second lights having first and second wavelengths, respectively, said first and second wavelengths being different from each other;
a light receiving unit configured to receive first and second reflection lights to generate first and second detection signals based on the first and second reflection lights, respectively, said first reflection light being based on the first light reflected from the measurement portion, said second reflection light being based on the second light reflected from the measurement portion, said first and second detection signals having different characteristics from each other due to the difference between the first and second wavelengths; and
a measuring unit configured to measure the biological condition based on the different characteristics of the first and second detection signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 23, 24, 25, 26)
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13. A biological condition measuring apparatus for measuring a biological condition of a living body, said apparatus comprising:
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a light emitting unit configured to emit individually an infrared light and a green right to a measurement portion of the living body;
a light receiving unit configured to receive first and second reflection lights to generate first and second detection signals based on the first and second reflection lights, respectively, said first reflection light being based on the infrared light reflected from the measurement portion, said second reflection light being based on the green light reflected from the measurement portion, said first and second detection signals having different characteristics from each other due to the difference between wavelengths of the infrared light and the green light; and
a measuring unit configured to measure the biological condition based on the different characteristics of the first and second detection signals. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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27. A sensor for sensing a biological condition of a living body, said sensor comprising:
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a housing having a first wall, a second opened wall opposite to the first wall, and a window wall fitted to the second opened wall;
a light emitting unit contained in the housing and configured to emit individually first and second lights through the window wall to a measurement portion of the living body, said first and second lights having first and second wavelengths, respectively, said first and second wavelengths being different from each other; and
a light receiving unit contained in the housing and configured to receive first and second reflection lights to generate first and second detection signals based on the first and second reflection lights, respectively, said first reflection light being based on the first light reflected through the window wall from the measurement portion, said second reflection light being based on the second light reflected through the window wall from the measurement portion, said first and second detection signals having different characteristics from each other due to the difference between the first and second wavelengths, wherein said window wall is provided at its an outer end surface with a stepped portion, said stepped portion includes a first surface, and a second surface through which the first light and the first reflection light are transmitted, said stepped surface being stepped inwardly with respect to the first surface. - View Dependent Claims (28)
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29. A sensor for sensing a biological condition of a living body, said sensor comprising:
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a housing having a first wall, a second opened wall opposite to the first wall, and a window wall fitted to the second opened wall;
a light emitting unit contained in the housing and configured to emit individually first and second lights through the window wall to a measurement portion of the living body, said first and second lights having first and second wavelengths, respectively, said first and second wavelengths being different from each other; and
a light receiving unit configured to receive first and second reflection lights to generate first and second detection signals based on the first and second reflection lights, respectively, said first reflection light being based on the first light reflected through the window wall from the measurement portion, said second reflection light being based on the second light reflected through the window wall from the measurement portion, said first and second detection signals having different characteristics from each other due to the difference between the first and second wavelengths, wherein said window wall has an outer end surface, said outer end surface includes a first surface and a second surface through which the first light and the first reflection light are transmitted, and said second surface is formed with concave and convex portions.
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30. A method of measuring a biological condition of a living body, said method comprising:
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individually emitting first and second lights to a measurement portion of the living body, said first and second lights having first and second wavelengths, respectively, said first and second wavelengths being different from each other;
receiving first and second reflection lights to generate first and second detection signals based on the first and second reflection lights, respectively, said first reflection light being based on the first light reflected from the measurement portion, said second reflection light being based on the second light reflected from the measurement portion, said first and second detection signals having different characteristics from each other due to the difference between the first and second wavelengths; and
measuring the biological condition based on the different characteristics of the first and second detection signals. - View Dependent Claims (31, 32, 33)
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34. A program product readable by a computer communicable with a light emitting unit and a light receiving unit, said light emitting unit being configured to emit individually first and second lights to a measurement portion of the living body, said first and second lights having first and second wavelengths, respectively, said first and second wavelengths being different from each other, said light receiving unit being configured to receive first and second reflection lights to generate first and second detection signals based on the first and second reflection lights, respectively, said first reflection light being based on the first light reflected from the measurement portion, said second reflection light being based on the second light reflected from the measurement portion, said first and second detection signals having different characteristics from each other due to the difference between the first and second wavelengths, said program product configured to cause the computer to:
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control the light emitting unit so that the light emitting unit controls that at least one of an intensity and an amount of the first light is lower than at least one of an intensity and an amount of the second light, and said different characteristics of the first and second detection signals are based on the difference of the first and second wavelengths, and the difference between the at least one of the intensity and the amount of the first light and the at least one of the intensity and the amount of the second light;
compare the characteristic of the first detection signal with that of the second detection signal; and
extract a signal from the first and second detection signals according to a result of the comparing, said extracted signal representing the biological condition.
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Specification