Measurements based on optics offer a wide range of unprecedented opportunities in the biological application due to the noninvasive or non-destructive detection. Wearable skin-like optoelectronic devices, capable of deforming with the human skin, play significant roles in future biomedical engineering such as clinical diagnostics or daily healthcare. However, the detected signals based on light intensity are very sensitive to the light path. The performance degradation of the wearable devices occurs due to device deformation or motion artifact. In this work, we propose the optical difference in the frequency domain of signals for suppressing the disturbance generated by wearable device deformation or motion artifact during the photoplethysmogram (PPG) monitoring. The signal processing is simulated with different input waveforms for analyzing the performance of this method. Then we design and fabricate a wearable optoelectronic device to monitor the PPG signal in the condition of motion artifact and use the optical difference in the frequency domain of signals to suppress irregular disturbance. The proposed method reduced the average error in heart rate estimation from 13.04 beats per minute (bpm) to 3.41 bpm in motion and deformation situations. These consequences open up a new prospect for improving the performance of the wearable optoelectronic devices and precise medical monitoring in the future.

中文翻译：

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频域光学差异可抑制可穿戴电子产品的干扰


由于非侵入性或非破坏性检测，基于光学的测量在生物应用中提供了广泛的前所未有的机会。可穿戴类皮肤光电设备能够随着人体皮肤变形，在未来的生物医学工程（如临床诊断或日常保健）中发挥重要作用。然而，基于光强度的检测信号对光路非常敏感。由于设备变形或运动伪影，可穿戴设备的性能下降。在这项工作中，我们提出了信号频域中的光学差异，用于抑制光电体积描记图（PPG）监测期间可穿戴设备变形或运动伪影产生的干扰。使用不同的输入波形对信号处理进行仿真，以分析该方法的性能。然后，我们设计并制造了一种可穿戴光电器件，用于在运动伪影的情况下监测PPG信号，并利用信号频域中的光学差异来抑制不规则干扰。在运动和变形情况下，所提出的方法将心率估计的平均误差从每分钟 13.04 次 (bpm) 减少到 3.41 bpm。这些结果为未来提高可穿戴光电设备的性能和精确医疗监测开辟了新的前景。