触觉传感器
计算机科学
传感器阵列
电子皮肤
机器人学
图像传感器
像素
人工智能
德拉姆
压阻效应
机器人
图像分辨率
计算机硬件
材料科学
纳米技术
光电子学
机器学习
作者
Zhiye Zhao,Jianshi Tang,Jian Yuan,Yijun Li,Yongheng Dai,Jianhua Yao,Qingtian Zhang,Sanchuan Ding,Tingyu Li,Ruirui Zhang,Yu Zheng,Zhengyou Zhang,Song Qiu,Qingwen Li,Bin Gao,Ning Deng,He Qian,Fei Xing,Zheng You,Huaqiang Wu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2022-09-27
卷期号:16 (10): 16784-16795
被引量:27
标识
DOI:10.1021/acsnano.2c06432
摘要
In the long pursuit of smart robotics, it has been envisioned to empower robots with human-like senses, especially vision and touch. While tremendous progress has been made in image sensors and computer vision over the past decades, tactile sense abilities are lagging behind due to the lack of large-scale flexible tactile sensor array with high sensitivity, high spatial resolution, and fast response. In this work, we have demonstrated a 64 × 64 flexible tactile sensor array with a record-high spatial resolution of 0.9 mm (equivalently 28.2 pixels per inch) by integrating a high-performance piezoresistive film (PRF) with a large-area active matrix of carbon nanotube thin-film transistors. PRF with self-formed microstructures exhibited high pressure-sensitivity of ∼385 kPa-1 for multi-walled carbon nanotubes concentration of 6%, while the 14% one exhibited fast response time of ∼3 ms, good linearity, broad detection range beyond 1400 kPa, and excellent cyclability over 3000 cycles. Using this fully integrated tactile sensor array, the footprint maps of an artificial honeybee were clearly identified. Furthermore, we hardware-implemented a smart tactile system by integrating the PRF-based sensor array with a memristor-based computing-in-memory chip to record and recognize handwritten digits and Chinese calligraphy, achieving high classification accuracies of 98.8% and 97.3% in hardware, respectively. The integration of sensor networks with deep learning hardware may enable edge or near-sensor computing with significantly reduced power consumption and latency. Our work could empower the building of large-scale intelligent sensor networks for next-generation smart robotics.
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