BIOLOGICAL SIGNAL MEASURING SYSTEM AND BIOLOGICAL SIGNAL MEASURING APPARATUS
First Claim
1. A biological signal measuring system comprising:
- a light emitter which is configured to emit light beams having different N kinds of wavelengths, where N is an integer of four or more;
a light receiver which is configured to output N kinds of signals respectively in accordance with received light intensities of the N kinds of light beams that have been passed through or reflected from a living tissue of a subject;
a first calculating section which is configured to acquire N kinds of light attenuations based on the N kinds of signals;
a second calculating section which is configured to acquire (N−
1) kinds of blood-derived light attenuations based on two light attenuations related to (N−
1) kinds of combinations selected from the N kinds of light attenuations;
a third calculating section which is configured to identify concentrations of (N−
1) kinds of in-blood substances based on the (N−
1) kinds of blood-derived light attenuations; and
an outputting section which is configured to output the identified concentrations.
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Abstract
A biological signal measuring system includes: a light emitter emitting light beams having different N kinds of wavelengths, where N is an integer of four or more; a light receiver outputting N kinds of signals respectively in accordance with received light intensities of the N kinds of light beams that have been passed through or reflected from a living tissue; a first calculating section acquiring N kinds of light attenuations based on the N kinds of signals; a second calculating section acquiring (N−1) kinds of blood-derived light attenuations based on two light attenuations related to (N−1) kinds of combinations selected from the N kinds of light attenuations; a third calculating section identifying concentrations of (N−1) kinds of in-blood substances based on the (N−1) kinds of blood-derived light attenuations; and an outputting section outputting the identified concentrations.
10 Citations
15 Claims
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1. A biological signal measuring system comprising:
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a light emitter which is configured to emit light beams having different N kinds of wavelengths, where N is an integer of four or more; a light receiver which is configured to output N kinds of signals respectively in accordance with received light intensities of the N kinds of light beams that have been passed through or reflected from a living tissue of a subject; a first calculating section which is configured to acquire N kinds of light attenuations based on the N kinds of signals; a second calculating section which is configured to acquire (N−
1) kinds of blood-derived light attenuations based on two light attenuations related to (N−
1) kinds of combinations selected from the N kinds of light attenuations;a third calculating section which is configured to identify concentrations of (N−
1) kinds of in-blood substances based on the (N−
1) kinds of blood-derived light attenuations; andan outputting section which is configured to output the identified concentrations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A biological signal measuring apparatus comprising:
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a signal receiving section which is configured to receive N kinds of signals corresponding to light intensities of light beams that have been passed through or reflected from a living tissue of a subject and that have N kinds of wavelengths, where N is an integer of four or more; a first calculating section which is configured to acquire N kinds of light attenuations based on the N kinds of signals; a second calculating section which is configured to acquire (N−
1) kinds of blood-derived light attenuations based on two light attenuations related to (N−
1) kinds of combinations selected from the N kinds of light attenuations;a third calculating section which is configured to identify concentrations of (N−
1) kinds of in-blood substances based on the (N−
1) kinds of blood-derived light attenuations; andan outputting section which is configured to output the identified concentrations.
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13. A method of controlling a biological signal measuring apparatus comprising a signal receiving section which is configured to receive N kinds of signals corresponding to light intensities of light beams that have been passed through or reflected from a living tissue of a subject and that have N kinds of wavelengths, where N is an integer of four or more, the method comprising:
- acquiring N kinds of light attenuations based on the N kinds of signals;
acquiring (N−
1) kinds of blood-derived light attenuations based on two light attenuations related to (N−
1) kinds of combinations selected from the N kinds of light attenuations;identifying concentrations of (N−
1) kinds of in-blood substances based on the (N−
1) kinds of blood-derived light attenuations, andoutputting the identified concentrations. - View Dependent Claims (14, 15)
- acquiring N kinds of light attenuations based on the N kinds of signals;
Specification