Optical Heart Rate Sensor
A sensor technology that estimates heart rate by illuminating the skin with an LED light source and detecting fluctuations in reflected light intensity caused by changes in blood volume. It has low power consumption and supports long-term wear, but its accuracy is susceptible to interference during vigorous exercise.
Core Facts
Timeline (last 90 days)
The Fitbit Edge is equipped with an optical heart rate sensor, supporting all-day heart rate monitoring and exercise heart rate zone alerts.
The optical sensors of smart rings are generally less accurate during intense exercise than chest-strap heart rate monitors.
The principle of PPG signal acquisition is that a light-emitting diode emits light of a specific wavelength into skin tissue, a photoelectric sensor receives changes in light intensity after absorption or reflection by the tissue, and hemoglobin's absorption of light fluctuates periodically with vascular volume.
All Facts (3)
The principle of PPG signal acquisition is that a light-emitting diode emits light of a specific wavelength into skin tissue, a photoelectric sensor receives changes in light intensity after absorption or reflection by the tissue, and hemoglobin's absorption of light fluctuates periodically with vascular volume.
75%UnverifiedThe Fitbit Edge is equipped with an optical heart rate sensor, supporting all-day heart rate monitoring and exercise heart rate zone alerts.
50%UnverifiedThe optical sensors of smart rings are generally less accurate during intense exercise than chest-strap heart rate monitors.
50%