Fingerprint-Inspired Flexible Tactile Sensor for Accurately Discerning Surface Texture
Fingerprint-Inspired Flexible Tactile Sensor for Accurately Discerning Surface Texture
复制标题
受指纹启发的柔性触觉传感器，可准确识别表面纹理
DOI：
10.1002/smll.201703902
复制
发表时间：
2018-04-19
期刊：
影响因子：
13.3
通讯作者：
Zhang, Ting
中科院分区：
文献类型：
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作者：
Cao, Yudong;Li, Tie;Zhang, Ting
受人体指纹表皮-真皮和外部微观结构的启发，设计了一种新型的柔性传感器装置，该装置由单壁碳纳米管、聚乙烯和聚二甲基硅氧烷组成，具有互锁和外部微金字塔阵列，以提高触觉感知和表面纹理识别。该传感器在0-300 Pa压力范围内具有较高的压力灵敏度（-3.26 kPa(-1)），能够检测到传感器外部微金字塔结构与被测材料表面动态相互作用引起的剪切力变化，可识别的微条纹最小尺寸低至15 μ m × 15 μ m（间隔x宽度）。为了验证传感器的纹理识别能力，测试了传感器对各种表面纹理的准确识别能力，如不同织物的纹理、盲文、倒金字塔图案等，这在机器人皮肤和触觉感知等方面具有很大的潜力。
Inspired by the epidermal-dermal and outer microstructures of the human fingerprint, a novel flexible sensor device is designed to improve haptic perception and surface texture recognition, which is consisted of single-walled carbon nanotubes, polyethylene, and polydimethylsiloxane with interlocked and outer micropyramid arrays. The sensor shows high pressure sensitivity (-3.26 kPa(-1) in the pressure range of 0-300 Pa), and it can detect the shear force changes induced by the dynamic interaction between the outer micropyramid structure on the sensor and the tested material surface, and the minimum dimension of the microstripe that can be discerned is as low as 15 mu m x 15 mu m (interval x width). To demonstrate the texture discrimination capability, the sensors are tested for accurately discerning various surface textures, such as the textures of different fabrics, Braille characters, the inverted pyramid patterns, which will have great potential in robot skins and haptic perception, etc.