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首页> 美国卫生研究院文献>Biosensors >Smart Garment Fabrics to Enable Non-Contact Opto-Physiological Monitoring
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Smart Garment Fabrics to Enable Non-Contact Opto-Physiological Monitoring

机译：智能服装面料可实现非接触式光生理监测

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Imaging photoplethysmography (iPPG) is an emerging technology used to assess microcirculation and cardiovascular signs by collecting backscattered light from illuminated tissue using optical imaging sensors. The aim of this study was to study how effective smart garment fabrics could be capturing physiological signs in a non-contact mode. The present work demonstrates a feasible approach of, instead of using conventional high-power illumination sources, integrating a grid of surface-mounted light emitting diodes (LEDs) into cotton fabric to spotlight the region of interest (ROI). The green and the red LEDs (525 and 660 nm) placed on a small cotton substrate were used to locally illuminate palm skin in a dual-wavelength iPPG setup, where the backscattered light is transmitted to a remote image sensor through the garment fabric. The results show that the illuminations from both wavelength LEDs can be used to extract heart rate (HR) reaching an accuracy of 90% compared to a contact PPG probe. Stretching the fabric over the skin surface alters the morphology of iPPG signals, demonstrating a significantly higher pulsatile amplitude in both channels of green and red illuminations. The skin compression by the fabric could be potentially utilised to enhance the penetration of illumination into cutaneous microvascular beds. The outcome could lead a new avenue of non-contact opto-physiological monitoring and assessment with functional garment fabrics.
机译：成像光体积描记术（iPPG）是一种新兴技术，用于通过使用光学成像传感器收集来自照明组织的反向散射光来评估微循环和心血管体征。这项研究的目的是研究有效的智能服装面料如何以非接触方式捕获生理信号。本工作演示了一种可行的方法，而不是使用常规的大功率照明源，而是将表面安装的发光二极管（LED）的网格集成到棉织物中以聚焦感兴趣的区域（ROI）。置于小棉质基板上的绿色和红色LED（525和660 nm）用于在双波长iPPG设置中局部照亮手掌皮肤，其中反向散射的光通过衣服织物传输到远程图像传感器。结果表明，与接触式PPG探头相比，两个波长LED的照明都可用于提取心率（HR），达到90％的精度。在皮肤表面拉伸织物会改变iPPG信号的形态，从而在绿色和红色照明的两个通道中都显示出明显更高的脉动幅度。织物对皮肤的压迫可潜在地用于增强照明向皮肤微血管床的渗透。结果可能会为功能性服装面料带来非接触式光生理监测和评估的新途径。

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