▎ 摘　　要

NOVELTY - The utility model claims a graphite and PVDF terahertz plasma resonant effect of the alcohol concentration measuring device. high resistance silicon prism in the device lower surface are arranged graphene, PVDF film, silicon dioxide film, alcohol solution to be tested and the high-resistance silicon substrate. when the silicon prism where the rotary table rotates for a certain angle and detector rotating corresponding two times angle and rotating angle scanning change in the specific range, the detector can obtain angle-reflectance curve. resonant peak of the reflection coefficient curve is moving along with the alcohol concentration change. Because the power of the backward wave oscillator is large, enabling the detector where larger radius and rotation angle resolution can be less than one minute, solution to be tested in the measuring device from the pure water angle-resonant movement of the reflectance peak curve is larger than 16 degrees, so that the measuring device measures the accuracy of the alcohol concentration reaches over to pure alcohol changes.