A dual-trigger-mode ionic hydrogel sensor for contact or contactless motion recognition,Materials Horizons

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A dual-trigger-mode ionic hydrogel sensor for contact or contactless motion recognition
Materials Horizons ( IF 12.2 ) Pub Date : 2020-07-08 , DOI: 10.1039/d0mh00862a
Qiao Wang _{1,

2,

3,

4,

5} , Hongyao Ding _{1,

2,

3,

4,

5} , Xiaosai Hu _{1,

2,

3,

4,

5} , Xiaoxu Liang _{1,

2,

3,

4,

5} , Miaomiao Wang _{1,

2,

3,

4,

5} , Qing Liu _{1,

2,

3,

4,

5} , Zongjin Li _{1,

2,

3,

4,

5} , Guoxing Sun _{1,

2,

3,

4,

5}

Affiliation

The intelligent flexible sensors with high responsivity and detectivity are highly desired for wearable devices and human–machine interfaces (HMI). However, the existing sensors are usually limited to onefold detection performance in either contact or noncontact mode. Here, a sandwiched hydrogel capacitive system is designed to fabricate a multi-operational-mode ionic sensor (MOMS) that simultaneously recognizes mechanical stimuli and remote gestures. The novel MOMS performs satisfying sensitivity (1.7 gauge factor and 3.3 Pa⁻¹ pressure sensitivity), rapid response for contactless gesture recognition, a quite wide working range (up to 100 kPa and 300% elongation) and a good touch-free operating distance (40 mm). Moreover, the spatial resolution of the structured sensor array meets the accurate positioning requirements under both contact and touch-free conditions. This is the first time that a capacitive hydrogel system exhibited outstanding performance in detecting contact stimuli and noncontact hand motions at the same time. Hence, the MOMS will allow significant advances in intelligent detection techniques and facilitate innovative thinking for the applications of synchronous monitoring devices.

中文翻译：

双触发模式离子水凝胶传感器，用于接触式或非接触式运动识别

对于穿戴式设备和人机界面（HMI）来说，具有高响应度和检测能力的智能柔性传感器是非常需要的。但是，现有的传感器通常仅限于接触或非接触模式下的单一检测性能。在这里，夹层水凝胶电容系统设计用于制造同时识别机械刺激和远程手势的多操作模式离子传感器（MOMS）。新型MOMS具有令人满意的灵敏度（1.7规格系数和3.3 Pa ^-1压力灵敏度），对非接触手势识别的快速响应，相当宽的工作范围（高达100 kPa和300％的伸长率）和良好的非接触式操作距离（40毫米）。此外，结构化传感器阵列的空间分辨率在接触和非接触条件下均满足精确的定位要求。这是电容性水凝胶系统首次在同时检测接触刺激和非接触手部动作方面表现出卓越的性能。因此，MOMS将在智能检测技术方面取得重大进步，并为同步监视设备的应用提供创新思维。

更新日期：2020-07-08

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