Bio signal measuring apparatus using bandwidth of pulse signal and user monitoring system including the same

A bio signal measuring apparatus comprising:

• a receiver configured to receive a pulse signal penetrating a person to be measured;
• a processing unit configured to detect a pulse signal of a heart of the person from the received pulse signal, process the pulse signal of the heart to analyze a bandwidth of the pulse signal of the heart and to measure a bio signal of the person to be measured based on an analysis result on the bandwidth, wherein the pulse signal of the heart of the person is a pulse signal having penetrated through the heart of the person among the received pulse signal;
• and
• a storage unit configured to store data used to measure the bio signal,
• wherein the processing unit analyzes the bandwidth of the pulse signal of the heart, measures a heartbeat of the person to be measured according to an analysis result of the bandwidth and monitors a condition of the person based on the measured heartbeat of the person,
• wherein the processing unit calculates the bandwidth of the pulse signal of the heart,
• wherein when the bandwidth is greater than a bandwidth threshold value, the processing unit determines a period of the pulse signal having the bandwidth as a contraction period of the heart, and
• wherein when the bandwidth is smaller than the bandwidth threshold value, the processing unit determines a period of the pulse signal of the heart having the bandwidth as a distension period of the heart.