The invention discloses a non-contact
vital sign monitoring system and method based on a mechanical programmable metasurface, and belongs to the technical field of intelligent medical monitoring. According to the
system, 360-degree continuous phase regulation and control are achieved through the mechanical programmable metasurface, the three-dimensional dynamic beam focusing technology and the improved
variational mode decomposition algorithm are combined, limb movement
noise is effectively restrained, and high-precision multi-person non-contact
respiration monitoring is achieved. The
system adopts a modular detachable metasurface architecture, supports the fast reconstruction of
wavefront coding, and can reduce the average error of
respiratory rate monitoring of a
human body in a double-arm swinging / walking state to 0.5 times / minute without continuous power supply. Experiments show that when the system is used for synchronously monitoring
breathing signals of the motion state of two persons in a complex indoor environment, the
signal-to-
noise is improved by 14 dB or above compared with that of a traditional scheme, and the manufacturing cost is reduced by 77.5%. The method is suitable for the fields of intelligent old-age care, infectious
disease isolation monitoring, sleep
breathing disorder screening and the like, and the clinical requirements of medical
privacy protection and long-term health monitoring are met.