Vital signs monitoring system based on piezoelectric film sensors

Abstract

The demand for health services for the elderly has become an urgent problem to be solved. In order to solve the problems of elderly people who are prone to sudden disease during sleep, difficulty in night care, and the unconstrained requirements for health monitoring, an unconstrained vital signs mattress monitoring system was proposed. An intelligent mattress with built-in thin film piezoelectric sensors was developed to realize the real-time monitoring of vital signs such as heart rate, respiratory rate and body movement state. At the same time, medical and health resources are integrated to provide personalized and precision health care services for the elderly including safety monitoring, health management, etc. and build a smart health and elderly care service system. The experimental application shows that the system can effectively prevent accidents, improve both the efficiency of care and the level of health care services.

Chest‐Laminated and Sweat‐Permeable E‐Skin for Speech and Motion Artifact‐Insensitive Cough Detection

“…Various vibrations accompany human activities such as body movements and chest movements caused by heartbeat, breathing, and coughing. [ 19 ] Cough, accompanied by a distinctive sound and forced air expiration, is a sudden expulsion of air from the lungs. [ 20 ] It is classically considered to comprise three phases: the inspiratory phase, compressive phase, and expiratory phase.…”

Unobstructive Heartbeat Monitoring of Sleeping Infants and Young Children Using Sheet-Type PVDF Sensors

“…Many unobstructive sensing methods observing vital signs, such as heartbeat and respiration, have been evaluated for integration into unobstructive vital sensors that are based on the detection principle of air pressure [6][7][8], water pressure [9], cameras [10,11], microphones [12], load cells [13][14][15], piezoresistive [16], capacitively-coupled electrodes [17], and piezoelectric films [1,[18][19][20][21][22][23][24][25][26][27][28]. Among these, the sheet-type vital sensor using polyvinylidene fluoride (PVDF) as the pressure-sensitive layer is one of the most promising vital 2 of 12 sensors from the perspective of sensitivity and adaptability to various measurement environments [1,18,[21][22][23][24][25][26][27][28]. When the PVDF pressure-sensitive layer is distorted by an external force, the direction of the dipole inside the PVDF layer changes, and an electric charge is induced in the electrode.…”