A Monocharged Electret Nanogenerator‐Based Self‐Powered Device for Pressure and Tactile Sensor Applications,Advanced Functional Materials

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A Monocharged Electret Nanogenerator‐Based Self‐Powered Device for Pressure and Tactile Sensor Applications
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2019-01-30 , DOI: 10.1002/adfm.201807618
Shaobo Gong _{1,

2} , Jinxi Zhang ₁ , Chenchen Wang _{1,

2} , Kailiang Ren _{1,

3,

4} , Zhong Lin Wang ₁

Affiliation

This study reports a self‐powered pressure sensor based on a monocharged electret nanogenerator (MENG). The sensor exhibits great advantages in terms of high reliability, ease of fabrication, and relatively high sensitivity. The working mechanism of the MENG sensor is studied by both theoretical derivations and finite element analyses to determine the electric potential distribution during the device operation. The MENG sensor exhibits a stable open circuit voltage ≈10 V at a 30.8 kPa pressure and a corresponding sensitivity of 325 mV kPa⁻¹. The stability testing result shows that the device has only ≈5% attenuation after 10 000 cycles of repeated testing at 30.8 kPa pressure. Furthermore, it is found that the MENG sensor responds not only to a dynamic force but also a static force. Finally, a sensor array consisting of nine MENG sensor elements is fabricated. The testing results from the sensor array also reveal that a single touch of the sensor element can immediately light up an LED light at the corresponding position. This device holds great promise for use in future tactile sensors and artificial skin applications.

中文翻译：

基于单电荷驻极体纳米发电机的自供电设备，用于压力和触觉传感器应用

这项研究报告了一种基于单电荷驻极体纳米发电机（MENG）的自供电压力传感器。该传感器在高可靠性，易于制造和相对较高的灵敏度方面显示出巨大的优势。通过理论推导和有限元分析研究了MENG传感器的工作机理，以确定设备运行期间的电势分布。MENG传感器在30.8 kPa压力下表现出稳定的开路电压≈10V，相应的灵敏度为325 mV kPa ^-1。稳定性测试结果表明，在30.8 kPa压力下进行10000次重复测试后，该器件的衰减仅≈5％。此外，发现MENG传感器不仅响应于动态力而且响应于静态力。最后，制造了由九个MENG传感器元件组成的传感器阵列。传感器阵列的测试结果还表明，只需触摸一下传感器元件，即可立即在相应位置点亮LED灯。该设备在未来的触觉传感器和人造皮肤应用中具有广阔的前景。

更新日期：2019-01-30

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