Method for predicting physical property data of oil product by using near infrared spectrum

A method for predicting physical property data of an oil product by using a near infrared spectrum. The method comprises steps of: classifying oil products by properties; collecting a group of sample from each variety; determining a near infrared spectrum of each sample; determining physical property data of each sample by a routine method according to oil product varieties; combining determined sample near infrared spectrums side by side and establishing a database according to determined characteristic data; obtaining fitting spectrum by fitting database spectrums; calculating a fitting degree according to the fitting spectrum and a spectrum to be measured; comparing with a threshold; for a sample to be measured with complete spectrum fitting, database spectrum characteristics participated in fitting predicting characteristic data of the sample.