Insulation paper infrared spectrum acquisition method based on power transformer

The invention discloses an insulation paper infrared spectrum acquisition method based on a power transformer. The method comprises the following steps of optimizing an integrating sphere structure, and removing the indentation of sample insulation paper and an integrating sphere detector, starting a spectrograph, and collecting dark noise of the photoelectric conversion module under the condition that a light source is not turned on, turning on a light source, and collecting an integrating sphere dark reading and a reference spectrum at the opening of the integrating sphere, based on an integrating sphere, collecting initial infrared spectrum data of the sample insulation paper, according to the dark noise of the photoelectric conversion module, through the dark reading of the integrating sphere and the reference spectrum, carrying out absorption error correction on the initial infrared spectrum data, and then rejecting abnormal samples in the infrared spectrum data after error correction to obtain an infrar