Graphene pulse sensing system and preparation method

Abstract

The application relates to the technical field of flexible electronic sensing and medical health monitoring, and discloses a graphene pulse sensing system and a preparation method, the system comprising a lower layer flexible pulse sensor, an upper layer stress feedback sensor, a signal acquisition and filtering circuit, a digital control and communication module and an analysis and visualization platform, the lower layer flexible pulse sensor being made of a polyurethane film transfer printed porous graphene network and being provided with a middle hollow cutting pattern; the upper layer stress feedback sensor is laminated on the lower layer flexible pulse sensor and is used for monitoring absolute static pre-pressure; the double-layer cooperative structure separates stress monitoring and pulse sensing physically, solves the waveform drift problem caused by unstable pressing force, the middle hollow cutting pattern prevents the polyurethane film transfer from being pulled, reduces contact resistance and inhibits motion artifacts, in combination with a high input impedance front end and an active low-pass filtering network, the system effectively filters environmental noise and realizes high-fidelity extraction of weak pulse signal.

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