Pulse period calculation device and biosensor equipped with the same
First Claim
1. A pulse period calculation device for calculating a rhythmic pulse period of a living body, the device comprising:
- a maximum value detecting unit configured to determine a maximum value of a biological signal of the living body by detecting a highest value of the biological signal during a predetermined time interval and selecting the highest value of the biological signal as the maximum value;
a peak value determining unit configured to determine that the determined maximum value is a peak value of the biological signal when the maximum value detecting unit does not detect a new value of the biological signal during a fixed time period following the determined maximum value that is greater than the highest value of the biological signal selected as the determined maximum value;
a calculating unit configured to calculate the rhythmic pulse period of the living body based on a measured time interval between successive peaks of the determined peak value of the biological signal when the measured time interval between the successive peaks is greater than the fixed time period; and
a fixed time period changing unit configured to select, as an updated fixed time period, one of a plurality of predetermined time periods based on the measured time interval between the successive peaks of the determined peak value of the biological signal,wherein, when the maximum value detecting unit determines that the highest value of the biological signal detected during the updated fixed time period following a current peak value of the biological signal is greater than the determined maximum value, the peak value determining unit updates the peak value of the biological signal to be the highest value of the biological signal detected during the updated fixed time period, andwherein the calculating unit is further configured to update the rhythmic pulse period based on a measured time interval between successive peaks of the updated peak value when the measured time interval between the successive peaks of the updated peak value is greater than the updated fixed time period.
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Abstract
A device for calculating a pulse period of a living body. The device includes a maximum value detecting unit that detects a maximum value of a biological signal received at a predetermined time interval, a peak value determining unit that determines whether the maximum value is a peak value of the biological signal detected by the maximum value detecting unit during a fixed time period, a calculating unit that calculates a rhythmic pulse period of a living body generating the biological signal based on a time interval between successive peak values of the biological signal; and a fixed time period changing unit that changes the fixed time period to a predetermined time period that corresponds to the time interval between the successive peak values of the biological signal.
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Citations
19 Claims
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1. A pulse period calculation device for calculating a rhythmic pulse period of a living body, the device comprising:
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a maximum value detecting unit configured to determine a maximum value of a biological signal of the living body by detecting a highest value of the biological signal during a predetermined time interval and selecting the highest value of the biological signal as the maximum value; a peak value determining unit configured to determine that the determined maximum value is a peak value of the biological signal when the maximum value detecting unit does not detect a new value of the biological signal during a fixed time period following the determined maximum value that is greater than the highest value of the biological signal selected as the determined maximum value; a calculating unit configured to calculate the rhythmic pulse period of the living body based on a measured time interval between successive peaks of the determined peak value of the biological signal when the measured time interval between the successive peaks is greater than the fixed time period; and a fixed time period changing unit configured to select, as an updated fixed time period, one of a plurality of predetermined time periods based on the measured time interval between the successive peaks of the determined peak value of the biological signal, wherein, when the maximum value detecting unit determines that the highest value of the biological signal detected during the updated fixed time period following a current peak value of the biological signal is greater than the determined maximum value, the peak value determining unit updates the peak value of the biological signal to be the highest value of the biological signal detected during the updated fixed time period, and wherein the calculating unit is further configured to update the rhythmic pulse period based on a measured time interval between successive peaks of the updated peak value when the measured time interval between the successive peaks of the updated peak value is greater than the updated fixed time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A pulse period calculation device for calculating a rhythmic pulse period of a living body, the pulse period calculation device comprising a processor configured to:
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determine a maximum value of a biological signal of the living body by detecting a highest value of the biological signal during a predetermined time interval and selecting the highest value of the biological signal as the maximum value; determine that the determined maximum value is a peak value of the biological signal when a new value of the biological signal is not detected during a fixed time period following the determined maximum value that is greater than the highest value of the biological signal selected as the determined maximum value; calculate the rhythmic pulse period of the living body based on a measured time interval between successive peaks of the determined peak value of the biological signal when the measured time interval between the successive peaks is greater than the fixed time period; select, as an updated fixed time period, one of a plurality of predetermined time periods as a changed fixed time period based on the measured time interval between the successive peaks of the determined peak value of the biological signal; update the peak value of the biological signal to be the highest value of the biological signal detected during the updated fixed time period when the highest value of the biological signal detected during the updated fixed time period following a current peak value of the biological signal is greater than the determined maximum value detected at the fixed time period; and update the rhythmic pulse period based on a measured time interval between successive peaks of the updated peak value when the measured time interval between the successive peaks of the updated peak value is greater than the updated fixed time period. - View Dependent Claims (13, 14, 15)
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16. A pulse period calculation method for calculating a rhythmic pulse period of a living body, the method comprising:
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determining a first maximum value of a biological signal of the living body by detecting a highest value of the biological signal during a predetermined time interval and selecting the highest value of the biological signal as the maximum value; determining that the determined maximum value is a peak value of the biological signal when a new value of the biological signal is not detected during a fixed time period following the determined maximum value that is greater than the highest value of the biological signal selected as the determined maximum value; calculating the rhythmic pulse period of the living body based on a measured time interval between successive peaks of the determined peak value of the biological signal when the measured time interval between the successive peaks is greater than the fixed time period; and selecting, as an updated fixed time period, one of a plurality of predetermined time periods based on the measured time interval between the successive peaks of the determined peak value of the biological signal; updating the peak value of the biological signal to be the highest value of the biological signal detected during the updated fixed time period when the highest value of the biological signal detected during the updated fixed time period following a current peak value of the biological signal is greater than the determined maximum value detected at the fixed time period; and updating the rhythmic pulse period based on a measured time interval between successive peaks of the updated peak value when the measured time interval between the successive peaks of the updated peak value is greater than the updated fixed time period. - View Dependent Claims (17, 18, 19)
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Specification