汽车车身油漆红外光谱特征

采集了287份汽车车身油漆样本，使用傅里叶变换显微红外光谱仪获取了940份油漆层光谱，对不同车型、颜色的汽车油漆的清漆层、面漆层、中涂层的光谱特征进行分析，并对其光谱相似度进行比较。结果表明，同车型不同颜色的清漆层光谱相似度达到99.5%，部分相近车型的清漆层光谱高度相似;面漆层光谱因车型、颜色不同而差异较大，相似度在70%以下;中涂层的普通腻子光谱间的相似度在83.33%～96.91%，水基腻子光谱间的相似度在70.12%～96.44%;油漆中的金属成分会影响面漆层光谱的吸收特征;汽车油漆光谱随使用时间变化而发生变化。

Infrared Spectrum Characteristics of Vehicle Body Paint

Two hundred eighty seven samples of vehicle paint were collected,and 940 spectra were obtained by Fourier transform infrared micro spectrometer.The spectral features of varnish,finish layer,and coated layers of different models and different color were analyzed,and the spectra similarities were compared.The results show that the varnish similarity on the same models with different color is 99.5%,and some similar model with the same manufacturer had high similarity.The finish spectra have remarkable differences with different model and different color,and the similarity degree is under 70%.The coated layer similarity varies between 83.33% and 96.91% among the common lacquer putty,and it ranges between 70.12% and 96.44% among the water-based lacquer putty.The metal components of paint will influence the spectrum characteristics.The spectra of the vehicle paint will change with the usage time.