School of Electrical Engineering and State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing 400044, China.
Institution of Microelectronics, Tsinghua University, Beijing 100084, China.
ACS Appl Mater Interfaces. 2022 Mar 16;14(10):12606-12616. doi: 10.1021/acsami.1c23725. Epub 2022 Mar 1.
Human-machine interaction (HMI) systems are widely used in the healthcare field, and they play an essential role in assisting the rehabilitation of patients. Currently, a large number of HMI-related research studies focus on piezoresistive sensors, self-power sensors, visual and auditory receivers, and so forth. These sensing modalities do not possess high reliability with regard to breathing condition detection. The humidity signal conveyed by breathing provides excellent stability and a fast response; however, humidity-based HMI systems have rarely been studied. Herein, we integrate a humidity sensor and a graphene thermoacoustic device into a humidity-based HMI system (HHMIS), which is capable of monitoring respiratory signals and emitting acoustic signals. HHMIS has a practical value in healthcare to assist patients. For example, it works as a prewarning system for respiratory-related disease patients with abnormal respiratory rates, and as an artificial throat device for aphasia patients. Achieved based on a laser direct writing technology, this wearable device features low cost, high flexibility, and can be prepared on a large scale. This portable non-contact HMMIS has broad application prospects in many fields such as medical health and intelligent control.
人机交互（HMI）系统在医疗保健领域得到广泛应用，它们在协助患者康复方面发挥着重要作用。目前，大量的 HMI 相关研究集中在压阻式传感器、自供电传感器、视觉和听觉接收器等方面。这些传感方式在呼吸状态检测方面的可靠性不高。呼吸所传递的湿度信号具有极好的稳定性和快速响应性；然而，基于湿度的 HMI 系统研究甚少。在这里，我们将湿度传感器和石墨烯热声器件集成到基于湿度的人机交互系统（HHMIS）中，该系统能够监测呼吸信号并发出声信号。HHMIS 在医疗保健方面具有实际应用价值，可以帮助患者。例如，它可以作为呼吸频率异常的呼吸相关疾病患者的预警系统，以及作为失语症患者的人工喉咙装置。该可穿戴设备基于激光直写技术实现，具有低成本、高灵活性的特点，可以大规模制备。这种便携式非接触式 HMMIS 在医疗健康和智能控制等许多领域具有广阔的应用前景。
