Abstract: It is possible to measure a pulse rate correctly, when a body moves. A frequency analysis unit 13 generates a pulse wave frequency signal by converting pulse wave detection signals detected by a light sensor 20 into a frequency domain signal from time domain signals. A body motion level determination unit 14 determines a body motion level of a subject based on acceleration detection signals output by an accelerometer 21. A peak detection unit 15 detects a peak of spectrum intensity in the pulse wave frequency signal within a peak searching range, which varies depending on the determined body motion level. A pulse calculation processing unit 16 generates pulse information based on a frequency position of the peak detected by the peak detection unit 15.

Abstract: It is possible to measure a pulse rate correctly, when a body moves. A frequency analysis unit 13 generates a pulse wave frequency signal by converting pulse wave detection signals detected by a light sensor 20 into a frequency domain signal from time domain signals. A body motion level determination unit 14 determines a body motion level of a subject based on acceleration detection signals output by an accelerometer 21. A peak detection unit 15 detects a peak of spectrum intensity in the pulse wave frequency signal within a peak searching range, which varies depending on the determined body motion level. A pulse calculation processing unit 16 generates pulse information based on a frequency position of the peak detected by the peak detection unit 15.

Abstract: There is a need to be able to perform optical calibration according to changes in measurement situations after the start of measurement. An LED 21 irradiates light to a subject. An optical detector 22 outputs an optical detection signal. A signal quality calculation portion 14 calculates signal quality of a pulsation signal generated based on the optical detection signal. A body motion level determination portion 15 determines whether the subject maintains a quiescent state based on acceleration detected by an acceleration sensor. A light intensity determination portion 16 determines luminescence quantity of the LED 21 based on the signal quality of the pulsation signal when the subject is determined to maintain a quiescent state.