The sensitivity improvement is the choke point of the soft strain sensor’s development. This paper focuses on heightening the soft strain sensor’s sensitivity through changing the sensitive unit’s shape. The sensitive units in shape of square or sine wave with different periods were studied in this work. Silver nanowires (Ag NWs) in excellent electrical conductivity and flexible polydimethylsiloxane (PDMS) were used as sensitive nanomaterials and soft substrate. The soft strain sensor whose sensitive unit is double cycled square wave performs the highest sensitivity whose gauge factor (GF) reaches to 14763.8. Based on the high sensitivity, the sensor was applied on real-time detection of the human expression.

中文翻译：

---

基于图形敏感单元的高灵敏度可穿戴应变传感器的研究

灵敏度的提高是软应变传感器发展的瓶颈。本文着重于通过更改敏感单元的形状来提高软应变传感器的灵敏度。研究了不同周期的方波或正弦波形状的敏感单位。具有优异导电性的银纳米线（Ag NWs）和柔性聚二甲基硅氧烷（PDMS）被用作敏感的纳米材料和软质基底。灵敏度单位为双周期方波的软应变传感器具有最高的灵敏度，其规格系数（GF）达到14763.8。基于高灵敏度，该传感器被应用于人类表情的实时检测。