A fully digital photoplethysmographic (PPG) sensor and actuator has been developed. The sensing circuit uses one Light Emitting Diode (LED) for emitting light into human tissue and one LED for detecting the reflectance light from human tissue. A Field Programmable Gate Array (FPGA) is used to control the LEDs and determine the PPG and Blood Oxygen Saturation (SpO2). The configurations with two LEDs and four LEDs are developed for measuring PPG signal and Blood Oxygen Saturation (SpO2). N-LEDs configuration is proposed for multichannel SpO2 measurements. The approach resulted in better spectral sensitivity, increased and adjustable resolution, reduced noise, small size, low cost and low power consumption.
展开▼
机译：已开发出全数字光电容积描记（PPG）传感器和执行器。感测电路使用一个发光二极管（LED）将光发射到人体组织中，以及一个LED用于检测来自人体组织的反射光。现场可编程门阵列（FPGA）用于控制LED并确定PPG和血氧饱和度（S p O 2 ）。开发了具有两个LED和四个LED的配置，用于测量PPG信号和血氧饱和度（S p O 2 ）。提出了用于多通道S p O 2 测量的N-LED配置。该方法产生了更好的光谱灵敏度，增加的和可调整的分辨率，减少的噪声，小尺寸，低成本和低功耗。
展开▼
