Xiaomi Smart Band is equipped with a heart rate sensor that is a PPG (photoplethysmography) sensor. This type of sensor uses light to measure heart rate by illuminating the skin and measuring changes in blood volume through the capillaries.
Here's how the heart rate sensor works on Xiaomi Smart Band:
1. The sensor emits light (usually green or infrared) onto skin. This light penetrates the skin and reaches the blood vessels underneath;
2. Blood absorbs light differently depending on its oxygenation level. When the heart beats, blood is pumped through the capillaries, causing changes in blood volume in the vessels beneath the skin;
3. The sensor measures the amount of light that is reflected back to determine blood volume changes. During each heartbeat, there is a characteristic pattern of light absorption and reflection, which can be used to calculate your heart rate;
4. The sensor captures this data and processes it to calculate your heart rate in beats per minute (BPM). This information is then displayed on the smart band's screen or synced to the Mi Fitness app for further analysis.
Here's how the heart rate sensor works on Xiaomi Smart Band:
1. The sensor emits light (usually green or infrared) onto skin. This light penetrates the skin and reaches the blood vessels underneath;
2. Blood absorbs light differently depending on its oxygenation level. When the heart beats, blood is pumped through the capillaries, causing changes in blood volume in the vessels beneath the skin;
3. The sensor measures the amount of light that is reflected back to determine blood volume changes. During each heartbeat, there is a characteristic pattern of light absorption and reflection, which can be used to calculate your heart rate;
4. The sensor captures this data and processes it to calculate your heart rate in beats per minute (BPM). This information is then displayed on the smart band's screen or synced to the Mi Fitness app for further analysis.