MicroNano System Research Center, Key Laboratory of Advanced Transducers and Intelligent Control Systems of the Ministry of Education and Shanxi Province, College of Information and Computer Science, Taiyuan University of Technology, Taiyuan, China.
Soft Robot. 2021 Jun;8(3):352-363. doi: 10.1089/soro.2020.0030. Epub 2020 Jul 13.
The flexible strain sensor is a fast-moving technology and has been used in many fields. The array design and application based on flexible strain sensors have been the current research hotspots. However, there are few reports on research of acoustic positioning using the flexible sensor array. Herein, we designed and realized the consistent fabrication of a thin-film, acoustic sensor array. The acoustic sensing research of the sensor was demonstrated as well. We used a convenient fabrication method to design a flexible acoustic sensor using silver nanowires coated on a thin polydimethylsiloxane (PDMS) film with mass block-beam structure. The acoustic sensor can record sound within a frequency domain of 20-2000 Hz and volume detection range of 83-108 dB. The sensor's resonance frequency is 380 Hz, horizontal distance sound detection limit is 5 cm, and vertical detection limit is 3.5 cm. We also achieved 360° azimuth detection in two-dimensional space with a detection accuracy of 15°. In three-dimensional space, the flexible acoustic sensor array was designed with two flexible acoustic sensors to detect the position of the sound source. This research first proposes the use of flexible acoustic sensors to test the sound source orientation.
柔性应变传感器是一项快速发展的技术，已经在许多领域得到了应用。基于柔性应变传感器的阵列设计和应用一直是当前的研究热点。然而，关于使用柔性传感器阵列进行声定位的研究报道较少。在这里，我们设计并实现了薄膜声传感器阵列的一致制造。还对传感器的声传感研究进行了演示。我们使用一种方便的制造方法，设计了一种使用涂覆在薄聚二甲基硅氧烷（PDMS）薄膜上的银纳米线的柔性声传感器，具有质量块-梁结构。声传感器可以记录 20-2000 Hz 频率范围内和 83-108 dB 音量检测范围内的声音。传感器的共振频率为 380 Hz，水平距离声检测极限为 5 cm，垂直检测极限为 3.5 cm。我们还通过二维空间中的两个柔性声传感器实现了 360°方位检测，检测精度为 15°。在三维空间中，设计了两个柔性声传感器的柔性声传感器阵列来检测声源的位置。本研究首次提出使用柔性声传感器来测试声源的方向。
