Seok Jo Hong, An Seongpil, Kwon Hyuk-Jin, Yarin Alexander L, Yoon Sam S
School of Mechanical Engineering, Korea University, Seoul, 02841, Republic of Korea.
SKKU Advanced Institute of Nanotechnology (SAINT) and Department of Nano Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea.
Sci Rep. 2020 Feb 14;10(1):2701. doi: 10.1038/s41598-020-59450-0.
A multifunctional sensor capable of simultaneous sensing of temperature, pressure, and proximity has been developed. This transparent and body-attachable device is also capable of providing heat under low voltage. The multi-sensor consists of metal fibers fabricated by electrospinning and electroplating. The device comprises randomly deposited metal fibers, which not only provide heating but also perform as thermal and proximity sensors, and orderly aligned metal fibers that act as a pressure sensor. The sensor is fabricated by weaving straight rectangular electrodes on a transparent substrate (a matrix). The sensitivity is readily enhanced by installing numerous matrices that facilitate higher sensing resolution. The convective heat transfer coefficient of the heater is h = 0.014 W·cm·°C. The temperature coefficient of resistivity (TCR) and pressure sensitivity (η) are 0.038 °C and 5.3 × 10 kPa, respectively. The superior sensitivity of the device is confirmed via quantitative comparison with similar devices. This multifunctional device also has a superior convective heat transfer coefficient than do other heaters reported in the literature.
一种能够同时感测温度、压力和接近度的多功能传感器已被开发出来。这种透明且可附着在身体上的设备还能够在低电压下提供热量。该多传感器由通过静电纺丝和电镀制造的金属纤维组成。该设备包括随机沉积的金属纤维，其不仅提供加热功能，还用作热传感器和接近度传感器，以及用作压力传感器的有序排列的金属纤维。该传感器是通过在透明基板（一个矩阵）上编织直的矩形电极制成的。通过安装多个有助于提高传感分辨率的矩阵，灵敏度很容易得到提高。加热器的对流换热系数为h = 0.014 W·cm·°C。电阻温度系数（TCR）和压力灵敏度（η）分别为0.038 °C和5.3×10 kPa。通过与类似设备的定量比较，证实了该设备具有卓越的灵敏度。这种多功能设备的对流换热系数也比文献中报道的其他加热器更高。
