Reflective type blood oxygen saturation detection system based on MAX30100

Oxygen is the key material to human's life, and oxygen saturation is one of the important indexes reflecting organic oxygen delivery status. Determining oxygen saturation in human blood by transmittance oxymetry is well developed as a monitoring technique, which is applied widely in clinical diagnosis or house health care. However, reflectance detecting is necessary in many circumstances, such as cerebral oxygen saturation, muscle oxygen saturation, or fetal oxygen saturation monitoring. So the reflective type oxygen saturation detection system gradually has become main flow of development. Based on the principle of oxygen saturation measurement, this paper introduces a blood oxygen saturation detection system design scheme based on the integrated chip MAX30100, which can simplify the circuit design, reduce system footprint, reduce the designing time and system power consumption. Through introduces the system hardware and software structure, signal processing methods and other aspects of the study to achieve the fingertip pulse signal acquisition and noise reduction processing. Through practical test, the system prototype machine realizes the function of pulse oxygen saturation detection.