Raman spectrum peak removal method and system based on derivative spectrum and cubic smoothing

• Main Authors: LIU ZELIN, HUANG FANRUI, ZHANG XINYUAN, PENG YUHAN, CHEN WEIGEN, WANG LIJIANG, SONG RUIMIN, YOON JI-HYUN, YANG ZHUANG, ZHANG RUYUE
• Format: Patent
• Language: Chinese; English
• Published: 04.10.2022
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a Raman spectrum peak removal method and system based on a derivative spectrum and cubic smoothing. The method comprises the following steps: deriving a Raman spectrum of transformer oil to obtain a derivative spectrum so as to identify a peak, and fitting a cubic smoothing curve by using peak feature points of the derivative spectrum so as to remove and fill a Raman spectrum peak region. The method can effectively identify and remove peaks caused by cosmic rays in the Raman spectrum data of the transformer oil, reduce interference of high-energy cosmic rays on Raman spectrum signals of the transformer oil, highlight characteristics of signals to be detected, ensure smoothness of the spectrum data, improve the signal-to-noise ratio of original spectrum signals, and improve the detection accuracy of the Raman spectrum signals of the transformer oil. The analysis accuracy of spectral data can be effectively improved; the method is simple, convenient and rapid, the required calculation am