Tao Lu-Qi, Gao Chenwei, Wang Guanya, Sun Hao, Guo Liang-Yan, Ren Tian-Ling
Beijing Engineering Research Center of Industrial Spectrum Imaging, School of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
National Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing, 400044, China.
Compos Sci Technol. 2023 Jun 28:110123. doi: 10.1016/j.compscitech.2023.110123.
In order to reduce the damage to people's health from diseases that attack the respiratory system such as COVID-19, asthma, and pneumonia, it is desired that patients' breathing can be monitored and alerted in real-time. The emergence of wearable health detection sensing devices has provided a relatively good response to this problem. However, there are still problems such as complex structure and poor performance. This paper introduces a laser-induced graphene (LIG) device that is attached to PDMS. The LIG is produced by laser irradiation of Nomex and subsequently transferred and attached to the PDMS. After being tested, it has demonstrated high sensitivity, stable tensile performance, good acoustic performance, excellent thermal stability, and other favorable properties. Notably, its gauge factor (GF) value can reach 721.67, which is quite impressive. Additionally, it is capable of emitting an alarm sound with an SPL close to 60 dB when receiving signals within the range of 5-20 kHz. The device realizes mechanical sensing and acoustic functions in one chip, and has a high application value in applications that need to combine sensing and early warning.
为了减少诸如新冠肺炎、哮喘和肺炎等侵袭呼吸系统的疾病对人们健康的损害，期望能够对患者的呼吸进行实时监测和警报。可穿戴健康检测传感设备的出现为这个问题提供了相对较好的解决方案。然而，仍然存在结构复杂和性能不佳等问题。本文介绍了一种附着在聚二甲基硅氧烷（PDMS）上的激光诱导石墨烯（LIG）器件。LIG是通过对Nomex进行激光辐照产生的，随后转移并附着到PDMS上。经过测试，它表现出高灵敏度、稳定的拉伸性能、良好的声学性能、出色的热稳定性等优良特性。值得注意的是，其应变片系数（GF）值可达721.67，相当可观。此外，当在5 - 20 kHz范围内接收信号时，它能够发出声压级接近60 dB的警报声。该器件在一个芯片中实现了机械传感和声功能，在需要结合传感和预警的应用中具有很高的应用价值。
