Estimating the Aging Grade of Heat-resistant Steel by Using Portable Laser-induced Breakdown Spectroscopy

Cai, Junbin; Dong, Meirong; Zhang, Yongsheng; Chen, Yixiang; Chen, Hongjie; Liang, Youcai; Li, Weijie; Lü, Jidong

doi:10.46770/as.2020.217

Cited by 10 publications

(6 citation statements)

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“…Among them, 40 high-quality spectral peaks were selected as the analytical lines for extracting classification features. 37 Their distributions and wavelengths are shown in Fig. 2 and Table 1, respectively.…”

Section: Methodsmentioning

confidence: 99%

A polynomial interactive reconstruction method based on spectral morphological features for the classification of gem minerals using portable LIBS

Yan

Qin

et al. 2022

J. Anal. At. Spectrom.

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Section: Methodsmentioning

confidence: 99%

A polynomial interactive reconstruction method based on spectral morphological features for the classification of gem minerals using portable LIBS

Yan

Qin

et al. 2022

J. Anal. At. Spectrom.

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“…In one, by Cai et al a portable LIBS instrument built in-house was used to study the aging of the heat resistant steel T91 . 29 The chemometric tools of wavelet threshold de-noising followed by multiple scattering correction were used to clean up the data. Then, both support vector machine (SVM) and k -fold support vector machine-recursive feature elimination (K-SVM-RFE) were used on the data from slices of pipe that had undergone different levels of aging to establish the model.…”

Section: Metalsmentioning

confidence: 99%

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

Carter

Clough

Fisher

et al. 2021

J. Anal. At. Spectrom.

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“…To further realize the application in the industrial field, we have also independently developed a portable LIBS device. 17 But the size and weight of the portable device are still limited in practical use.…”

Section: Introductionmentioning

confidence: 99%

A Spectral Optimization Method To Enhance Handheld LIBS For T91 Aging Grade Classification Using Lorentzian Profile And Kalman Filter

Dong

2024

At.Spectrosc.

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The handheld laser-induced breakdown spectroscopy (LIBS) device has been developed to evaluate the aging grade of T91 heat-resistant steel. However, the reduced size of the device could potentially affect the accuracy of the measurement. To overcome this challenge, a novel spectral preprocessing approach that combines Lorentzian fitting correction and extended Kalman filter with support vector machine (SVM) is proposed in this work to enable the reliable evaluation of T91 aging grade by a handheld LIBS. The spectral features of T91 samples were measured and revealed that the obtained spectral line broadening is mainly due to Stark broadening. Consequently, the independent spectral peaks in the spectra can be corrected with Lorentzian function to obtain more comprehensive spectral information. Afterwards, the extended Kalman filter is introduced to further correct the measured spectral data, diminishing the fluctuation in the spectral signal and the device noise during the measurement. The results show that the accuracy of the T91 aging grade classification model based on the new preprocessing method can achieve 94 %. This surpasses the accuracy of the models developed with standard normal variation (SNV) and multi-scatter calibration (MSC) preprocessing methods. The proposed method improves the accuracy of handheld LIBS for T91 aging grade classification and provides a new insight into improving the quality of LIBS spectral data.

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Estimating the Aging Grade of Heat-resistant Steel by Using Portable Laser-induced Breakdown Spectroscopy

Cited by 10 publications

References 0 publications

A polynomial interactive reconstruction method based on spectral morphological features for the classification of gem minerals using portable LIBS

A polynomial interactive reconstruction method based on spectral morphological features for the classification of gem minerals using portable LIBS

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

A Spectral Optimization Method To Enhance Handheld LIBS For T91 Aging Grade Classification Using Lorentzian Profile And Kalman Filter

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