SPO2 measurement system based on wrist-type photoplethysmography and method thereof

摘要

The present invention relates to a wrist-type photoelectric pulse-wave-based oxygen saturation measurement system and method. According to a first aspect of the present invention, there is provided a method for measuring a pulse wave and an oxygen saturation of a wrist wearing type radio-pulse-wave measuring apparatus, A second step of transmitting the measurement signal to the smartphone by the wrist-wearing radio-pulse-wave measuring device; And a third step of outputting a calculation result of a pulse wave and an oxygen saturation obtained by applying a Kalman filter to the measurement signal received by the application of the smartphone, And a method for measuring oxygen saturation based on a wrist type photoelectric pulse wave.Further, the second aspect of the present invention is a light emitting device including a light emitting / receiving unit divided into a light emitting unit (R / IR LED) and a light receiving unit (Photo-Diode) A wrist-worn wireless pulse wave measuring apparatus comprising: And smartphones; Wherein the MCU controls the light emitting unit (R / IR LED), and when the current flows through the constant current control, the MCU controls the IR LED On, the Red LED On, (I / V) converter, the current output signal generated when a current proportional to the amount of light incident on the light-receiving unit is controlled by the control of the light-receiving unit (Photo-Diode) After passing through the voltage signal,₂Calculating the oxygen saturation of the blood using the AC / DC value of the IR / Red signal, and transmitting the oxygen saturation of the wrist to the smartphone through the Bluetooth module and outputting the oxygen saturation based on the wrist-type photoelectric pulse wave-System.Thus, by removing the motion noise from the pulse signal using the Kalman filter, the SNR performance of at least 1.3 times higher than that of the moving average filter, which is the most used for noise reduction of the PPG signal, is improved.In addition, the present invention can be easily utilized in everyday life through non-invasive pulse wave measurement by utilizing the application of the measurement device and the smartphone, thereby providing the effect of helping the user to continuously manage the health through the measurement of the pulse wave signal .;