Pulse measurement device, pulse measurement method, and pulse measurement program

A method for measuring a pulse rate of a measurement subject carried out by a pulse measurement device, the method comprising:

• a data obtainment step of obtaining a pulse wave signal expressing a pulse of the measurement subject using a pulse wave sensor;
• a storage step of storing the pulse wave signal in a storage unit;
• a frequency conversion step of finding a frequency spectrum of the pulse wave signal by converting the time-domain pulse wave signal stored in the storage unit into a frequency domain;
• an exercise intensity obtainment step of obtaining an exercise intensity signal expressing an intensity of exercise performed by the measurement subject using a body movement sensor;
• a searched range setting step of setting a searched frequency range for searching for an intensity peak along a frequency axis of the frequency spectrum;
• a peak extraction step of extracting an intensity peak from the frequency spectrum in the set searched frequency range;
• and
• a pulse rate calculation step of finding the pulse rate of the measurement subject based on a frequency of the extracted intensity peak,
• wherein the searched range setting step includes a step of changing the searched frequency range based on an exercise intensity indicated by the exercise intensity signal.

A pulse rate measurement computer program capable of causing a computer of a pulse measurement device to execute:

• a data obtainment step of obtaining a pulse wave signal expressing a pulse of a measurement subject using a pulse wave sensor;
• a storage step of storing the pulse wave signal in a storage unit;
• a frequency conversion step of finding a frequency spectrum of the pulse wave signal by converting the time-domain pulse wave signal stored in the storage unit into a frequency domain;
• an exercise intensity obtainment step of obtaining an exercise intensity signal expressing an intensity of exercise performed by the measurement subject using a body movement sensor;
• a searched range setting step of setting a searched frequency range for searching for an intensity peak along a frequency axis of the frequency spectrum;
• a peak extraction step of extracting an intensity peak from the frequency spectrum in the set searched frequency range;
• and
• a pulse rate calculation step of finding the pulse rate of the measurement subject based on a frequency of the extracted intensity peak,
• wherein the searched range setting step includes a step of changing the searched frequency range based on an exercise intensity indicated by the exercise intensity signal.