A method for non-destructive and pressure-free identification of textile cultural relic materials based on infrared spectroscopy

Abstract

The invention relates to the technical field of cultural relics protection, and discloses a method for non-destructive and pressure-free identification of textile cultural relic materials based on infrared spectroscopy, including: 1) placing a reflective sheet on the detection platform of an infrared spectrometer, and laying the textile cultural relics to be tested on the reflective on flakes. 2) Adjust the detection probe of the near-infrared spectrometer, control the distance between the detection probe and the textile cultural relics at 0.2-1mm, collect near-infrared spectral information, and obtain the near-infrared spectral diagram of the textile cultural relics. 3) Perform S.Golay smoothing filtering on the near-infrared spectrum, and then process the second-order derivative spectrum. 4) Compare the processed near-infrared spectrum with the textile near-infrared standard spectrum to identify the material of the textile cultural relics. The method of the invention can improve the near-infrared light reflectance of the sample without destroying or applying pressure to the sample, and can quickly and non-destructively identify the material of the textile cultural relics in combination with a unique data processing method.

Description

technical field [0001] The invention relates to the technical field of cultural relic protection, in particular to a method for identifying the material of textile cultural relics. Background technique [0002] The materials of textile cultural relics are mostly natural animal and plant fibers. Due to the influence of the burial environment and the preservation environment, the materials have undergone aging and degradation to varying degrees, causing the molecular groups of the materials to undergo structural changes. The structural groups that make up the materials are detected by infrared spectroscopy. Spectral results can show different degrees of infrared absorption weakening and characteristic absorption changes, etc. Therefore, the identification of textile cultural relic materials by near-infrared spectral detection methods can better distinguish the ancient textile cultural relic materials. [0003] There are many detection methods and data processing methods for th...

AI Technical Summary

Problems solved by technology

[0003] There are many detection methods and data processing methods for the detection of textile cultural relics by infrared spectroscopy, including mid-far infrared and near-infrared spectroscopy. For extremely precious cultural relics, sampling will destroy their integrity, sampling analysis and testing cannot be done, and surface force analysis is not suitable, so a non-destructive and force-free material testing method is needed

[0004] Existing data processing methods for textile fiber detection by near-infrared spectroscopy mainly eliminate the influence of noise and baseline drift on spectral data through differential and multivariate light-scattering correction algorithms, thereby improving the data signal-to-noise ratio. For textile cultural relics, using infrared spectroscopy During detection, due to the requirements of non-destructive and pressure-free detection, the existing methods fail to improve its infrared reflectivity, especially when the number of fabric fibers is small, the infrared reflection signal will be significantly weakened, thus affecting the accuracy of the infrared spectrum of the material

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