高柔性壓電絲線感測器製程之開發及於手勢感測之應用

Abstract

本論文旨在開發高柔性壓電應變感測手套，以應用於人體手部運動之量測。為製作高靈敏度之高柔性感測器，選用聚(偏氟乙烯-三氟乙烯)(Poly(vinylidene fluoride-co-trifluoroethylene)，P(VDF-TrFE))作為感測元件之材料，此高分子鐵電材料具有良好的力電耦合性質，並開發無針式多股靜電紡絲製程以製作出高柔性之壓電絲線，透過此靜電紡絲製程中的加熱系統及拉伸系統提升壓電絲線之抗拉性質和纖維排列性，每秒可生產出12mm長度之壓電絲線，而此絲線可承受40%之形變大小，並透過纖維線性化製程使此絲線具有固定的纖維排列，可使絲線提升最高3.2倍的壓電輸出。接著製作應變感測器，使用銀紗線作為電極以及TPU塑膠膜作為感測器基材，並利用熱壓使TPU軟化以固定壓電絲線和銀線電極，完成感測器製程開發，再透過極化製程使壓電絲線具有最佳的晶相排列和鐵電特性，且使用360度連桿平台及仿皮膚拉伸裝置量測感測器性質，得知拉伸感測器於10%至40%之形變大小時，感測器具有高線性和高重複性之輸出訊號。進而開發應變感測手套製程，，完成可量測手部運動的手套型感測裝置，此手套可成功量測不同手部姿勢，其可應用於虛擬實境、健康醫療及健身運動等相關領域。

In this dissertation, a highly flexible piezoelectric strain sensing gloves that can measurement hand-gestures is developed. In order to produce a highly sensitive and highly flexible sensor, poly(vinylidene fluoride-co-trifluoroethylene) (P (VDF-TrFE)) is used as the sensing element. It is a piezoelectric polymer that has a good force-electric coupling for sensor application. A needleless electrospinning process is developed to produce a highly flexible and stretchable piezoelectric thread. Using a heating system and a stretching system in the post-electrospinning process, the thread would improve its fiber alignment and to enhance its stretchability. The needleless electrospinning process which can produce a piezoelectric thread in a speed of 12 mm/s, and the thread can withstand deformation up to 40% strain. . The fiber structure is further aligned by a cyclic stretching system, so that its piezoelectric output is enhanced 3.2 times. Then, using silver wires as an electrode and a Thermoplastic polyurethane (TPU) adhesive film as a sensor substrate, a strain sensor is fabricated for large stain sensing. The piezoelectric thread is thermally bond between two TPU films followed by a polarization process to improve its ferroelectric characteristics. Using a 360-degree rotatory platform and an inflatable platform to measure sensor performance, it is verified that the sensor can sustain 10% to 40% strain. It has a high linearity and a high repeatability output signal. Finally, the process to develop a strain sensing glove is developed, and the sensor is thermally bond to a nylon glove by using hot pressing process. It is experimentally verified that this glove can be used to measure different hand gesture successfully. It can be applied to the field of virtual reality, health care, and fitness usage.