Optics and Photonics Group, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK.
Footfalls and Heartbeats UK Ltd, Innovation Building, Biocity, Nottingham NG1 1GF, UK.
Sensors (Basel). 2020 Mar 30;20(7):1904. doi: 10.3390/s20071904.
An optical fibre sensor for monitoring relative humidity (RH) changes during exercise is demonstrated. The humidity sensor comprises a tip coating of poly (allylamine hydrochloride) (PAH)/silica nanoparticles (SiO NPs) deposited using the layer-by-layer technique. An uncoated fibre is employed to compensate for bending losses that are likely to occur during movement. A linear fit to the response of the sensing system to RH demonstrates a sensitivity of 3.02 mV/% (R = 0.96), hysteresis ± 1.17% RH when 11 bilayers of PAH/SiO NPs are coated on the tip of the fibre. The performance of two different textiles (100% cotton and 100% polyester) were tested in real-time relative humidity measurement for 10 healthy volunteers. The results demonstrate the moisture wicking properties of polyester in that the relative humidity dropped more rapidly after cessation of exercise compared to cotton. The approach has the potential to be used to monitor sports performance and by clothing developers for characterising different garment designs.
一种用于监测运动过程中相对湿度 (RH) 变化的光纤传感器得到了展示。该湿度传感器由使用层层技术沉积的聚(盐酸烯丙胺) (PAH)/ 硅纳米粒子 (SiO NPs) 的尖端涂层组成。未涂层的光纤用于补偿运动过程中可能发生的弯曲损耗。对传感系统对 RH 的响应的线性拟合表明，当纤维尖端涂覆 11 层 PAH/SiO NPs 时，其灵敏度为 3.02 mV/% (R = 0.96)，滞后 ± 1.17% RH。两种不同纺织品 (100%棉和 100%聚酯) 的性能在 10 名健康志愿者的实时相对湿度测量中进行了测试。结果表明，聚酯具有吸湿排汗的特性，即在运动停止后，其相对湿度下降得更快。该方法有望用于监测运动表现，并为服装开发商用于描述不同的服装设计。
