A battery-powered multisensor acquisition system with five dedicated channels [electrocardiograph (50 μW), bioimpedance (46 μW), galvanic skin response (15 μW), and 2× photoplethysmogram (134 μW)] is ...

光电容积脉搏波(ppg)因其非侵入性和可穿戴性成为研究热点，但现有算法面临数据不平衡、可解释性差等挑战。 针对这些问题，Karmen Markov等研究人员在《npj Biosensing》发表研究，通过机器学习方法开发了基于PPG信号的睡眠分期模型。

A month has gone by since the last earnings report for PPG Industries (PPG). Shares have added about 1.6% in that time frame, underperforming the S&P 500. Will the recent positive trend continue ...

原始PPG信号需反相处理，因Galaxy Watch采用反射式传感器设计。 这项研究的突破性在于构建了首个“消费-研究”双轨验证体系。 通过对比Galaxy Watch 5与Empatica E4在相同生理状态下的表现，发现即使经过先进滤波处理，消费设备在剧烈运动时仍丢失近40%的ECG特征峰。