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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频域的光学差异可抑制可穿戴电子设备的干扰

由于无创或无损检测，基于光学的测量在生物学应用中提供了广泛的前所未有的机会。能够随人的皮肤变形的可穿戴皮肤状光电器件在未来的生物医学工程（例如临床诊断或日常医疗保健）中发挥重要作用。但是，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，导致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，以抑制在光电容积描记（PPG）监测期间由可穿戴设备变形或运动伪影产生的干扰。用不同的输入波形模拟信号处理，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设备，以在运动伪影的情况下监视PPG信号，并利用信号频域中的光学差异来抑制不规则干扰。所提出的方法在运动和变形情况下，将心率估计的平均误差从13.04次/分钟（bpm）降低到3.41 bpm。这些后果为将来改善可穿戴光电设备的性能和精确的医疗监控开辟了新的前景。然后，我们设计并制造了一种可穿戴光电设备，以在运动伪影的情况下监视PPG信号，并利用信号频域中的光学差异来抑制不规则干扰。所提出的方法在运动和变形情况下，将心率估计的平均误差从13.04次/分钟（bpm）降低到3.41 bpm。这些后果为将来改善可穿戴光电设备的性能和精确的医疗监控开辟了新的前景。然后，我们设计并制造了一种可穿戴光电设备，以在运动伪影的情况下监视PPG信号，并利用信号频域中的光学差异来抑制不规则干扰。所提出的方法在运动和变形情况下，将心率估计的平均误差从13.04次/分钟（bpm）降低到3.41 bpm。这些后果为将来改善可穿戴光电设备的性能和精确的医疗监控开辟了新的前景。