A lubricant detection method based on phase modulation and two-dimensional correlation spectroscopy

By using a phase-modulated Fourier transform spectroscopy detection system and a two-dimensional correlation spectroscopy analysis method, the problem that traditional spectrometers cannot detect the dynamic spectrum of lubricants in real time has been solved, enabling rapid and highly sensitive analysis of lubricant components and molecular structures.

CN115963075BActive Publication Date: 2026-06-16TIANJIN UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN UNIV
Filing Date
2023-01-17
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

Traditional Fourier transform spectrometers cannot achieve real-time dynamic spectral detection of lubricants under different conditions, and cannot effectively distinguish the changes in composition and molecular structure in complex samples.

Method used

A phase-modulated Fourier transform spectral detection system, combined with a dispersion and phase scanning device, was used to acquire and process the dynamic spectra of lubricants under temperature and pressure through principal component analysis and two-dimensional correlation spectral analysis. Characteristic variables were extracted and two-dimensional correlation analysis was performed.

Benefits of technology

It enables rapid and highly sensitive analysis of lubricants under high temperature and high pressure conditions, and can distinguish changes in their composition and molecular structure, thereby improving the resolution and temporal resolution of spectral detection.

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Abstract

The application discloses a kind of based on phase modulation and two-dimensional correlation spectroscopy lubricant detection method, comprising the following steps: through the Fourier transform spectroscopy detection system based on phase modulation, the dynamic original interference spectrogram of the lubricant sample to be measured under the action of different disturbance factors is collected, and dynamic sample absorption spectrogram is obtained after Fourier transform;Spectral feature extraction and decomposition are carried out to dynamic sample absorption spectrum, and the characteristic variable related to temperature and the characteristic variable related to pressure are obtained;Select the characteristic variable related to temperature and the characteristic variable related to pressure to carry out two-dimensional correlation analysis, obtain the difference between the direction and the rate of change of different components and molecular bond structure of the lubricant sample to be measured in phase change process, to distinguish the relationship between lubricant molecular structure and property.The method can effectively distinguish the spectral change characteristics of lubricant under the action of different temperature and pressure, and can be used for rapid and high-sensitivity analysis of lubricant properties and components.
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