| 摘要 |
A method is provided for measuring the volume fraction of reinforcement 5 in a composite material 4 in which a translucent polymer matrix is reinforced by the reinforcement (carbon or glass fibre).. The method includes providing a measuring device having a light emitter 1 and an adjacent light detector 2, both adapted for placement at a surface 3 of the composite material 4. The method further includes emitting light of a predetermined intensity from the light emitter into the surface, and, with the light detector, detecting an intensity of the portion of the emitted light returned by diffusion or backscattering to the surface. The method further includes determining a ratio of the intensity of the detected light relative to the predetermined intensity. The method further includes measuring the volume fraction of reinforcement at the surface of the composite material by comparing the determined intensity ratio to a calibration scale which relates volume fraction of reinforcement at the surface of the composite material to intensity ratio obtained by the measuring device. |
