Heart rate detection device, sheet equipped with heart rate detection device, and heart rate detection method

摘要

PROBLEM TO BE SOLVED: To appropriately acquire a frequency caused by a heart rate in a heart rate detection device using a Doppler sensor. SOLUTION: A heart rate detection device 2 is a Doppler sensor 31 that outputs a Doppler signal including frequency information according to a speed of a measurement target, and a signal analysis device 32 that determines a heart rate to be measured based on the Doppler signal. And have. The signal analysis device includes a signal conversion unit 51 that converts a Doppler signal into a frequency spectrum, and a data extraction unit 52 that extracts a fundamental wave spectrum in the fundamental frequency band and a harmonic spectrum in a plurality of harmonic frequency bands from the frequency spectrum. And, the synthetic spectrum calculation unit 53 that compresses and moves the harmonic spectrum and superimposes it on the fundamental wave spectrum to generate a synthetic spectrum, determines the frequency with the highest signal intensity from the synthetic spectrum, and determines the frequency with the highest signal intensity, and the heartbeat is based on that frequency. It has a heart rate determining unit 54 for calculating a number. [Selection diagram] Fig. 3