▎ 摘　　要

NOVELTY - A pressure sensor comprises a sensing unit and a signal processing unit, where the sensing unit is a graphene-based elastic structure for collecting pressure data and outputting resistance signal, the signal processing unit comprises a single chip microcomputer and a display screen, the single chip microcomputer filters the collected resistance signal first, the signal is amplified, and finally converted into a pressure value, and the display screen displays the pressure value, two ends of the graphene-based elastic structure are respectively connected with electrode lines, and are connected in series with the single-chip microcomputer, the graphene-based elastic structure is composed of a graphene structural unit which is a graphene nano film having a thickness of 30-100 nm and an area of 100-40,000 mu m2, the edge of the graphene nano film is crosslinked with adjacent graphene structural units to form a stereoscopic porous structure. USE - Pressure sensor. ADVANTAGE - The pressure sensor has high sensitivity, short response time and very long service life. DETAILED DESCRIPTION - A pressure sensor comprises a sensing unit and a signal processing unit, where the sensing unit is a graphene-based elastic structure for collecting pressure data and outputting resistance signal, the signal processing unit comprises a single chip microcomputer and a display screen, the single chip microcomputer filters the collected resistance signal first, the signal is amplified, and finally converted into a pressure value, and the display screen displays the pressure value, two ends of the graphene-based elastic structure are respectively connected with electrode lines, and are connected in series with the single-chip microcomputer, the graphene-based elastic structure is composed of a graphene structural unit which is a graphene nano film having a thickness of 30-100 nm and an area of 100-40,000 mu m2, the edge of the graphene nano film is crosslinked with adjacent graphene structural units to form a stereoscopic porous structure, and the graphene nano film has a hetero atom content of 10% by weight or less and a defect density ID/IG of 0.02 or more.