A Wearable Body Condition Sensor System with Wireless Feedback Alarm Functions

Abstract

Emerging feedback systems based on tracking body conditions can save human lives. In particular, vulnerable populations such as disabled people, elderly, and infants often require special care. For example, the high global mortality of infants primarily owing to sudden infant death syndrome while sleeping makes request for extraordinary attentions in neonatal intensive care units or daily lives. Here, a versatile laser‐induced graphene (LIG)‐based integrated flexible sensor system, which can wirelessly monitor the sleeping postures, respiration rate, and diaper moisture with feedback alarm notifications, is reported. A tilt sensor based on confining a liquid metal droplet inside a cavity can track at least 18 slanting orientations. A rapid and scalable laser direct writing method realizes LIG patterning in both the in‐plane and out‐of‐plane configurations as well as the formation of nonstick conductive structures to the liquid metal. By rationally merging the LIG‐based tilt, strain, and humidity sensors on a thin flexible film, the multimodal sensor device is applied to a diaper as a real‐time feedback tracking system of the sleeping posture, respiration, and wetness toward secure and comfortable lives. User‐friendly interfaces, which incorporate alarming functions, provide timely feedback for caregivers tending to vulnerable populations with limited self‐care capabilities.

Constructing a Segregated Magnetic Graphene Network in Rubber Composites for Integrating Electromagnetic Interference Shielding Stability and Multi-Sensing Performance

“…Nowadays, flexible, wearable electronic devices with superior sensing properties that can monitor the human body’s physical health, walking movement, state changes, etc., play a significant role in the field of smart products in our daily lives [ 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 ]. Additionally, it is important to prepare flexible composites with both excellent EMI shielding and sensing properties.…”

Wireless and Flexible Skin Moisture and Temperature Sensor Sheets toward the Study of Thermoregulator Center

“…The real‐time study on finger‐skin moisture at different physical states was conducted by attaching the proposed integrated flexible sensor system, which included temperature and humidity sensors, on the fingers or in wearable gloves ( Figure a,b). [ 27,28 ] Skin, which is endowed with complex sensory systems, not only acts as the first line of defense from external factors but also plays a major role in mechanical contact, somatic perception, and nutrient exchange with the external environment (Figure 1c). [ 2 ]…”

Liquid‐Based Digital Readable Tilt Sensor

“…Takei et al [ 17 ] proposed a tilt sensor using liquid metal as a conductive liquid material. In the present study, only the tilt direction was determined by detecting the minute movement of the liquid metal.…”