中国电机工程学报2026，Vol.46Issue(8)：3466-3477,中插33,13.DOI:10.13334/j.0258-8013.pcsee.242900
改善低功率激励源红外热波检测效果的线性调频脉冲热成像技术研究
Linear Frequency Modulation Pulse Thermal Imaging Technology to Improving Detection Performance of Infrared Thermography Under Low-power Excitation Source
摘要
Abstract
To address the issues in infrared thermography detection technology,such as the strong dependence of pulsed thermography on excitation light energy,shallow detection depth,excessively high excitation power,and complex equipment structure,this paper adopts an infrared thermography detection method based on linear frequency modulation pulse thermography.This approach aims to achieve effective detection of deep-seated defects in power insulation equipment under low-power conditions.First,a thermal radiation model of the excitation light source acting on the test specimen is established,and the excitation principle of linear frequency modulation pulse thermography is explained.Then,this paper builds a corresponding experimental platform to conduct tests on carbon fiber composite panels under different excitation powers.Finally,algorithms such as fast Fourier transform(FFT)transform,cross-correlation operation,and principal component analysis are employed to process the experimental data,and the results are compared with those of pulsed thermography.The results show that linear frequency modulation pulse thermography can effectively characterize deep-seated defects,with the Fast Fourier Transform(FFT)phase providing the best characterization performance.For defects deeper than 2 mm,this method significantly improves the detection signal-to-noise ratio.Moreover,the detection performance for deep-seated defects is weakly correlated with excitation power,enabling effective detection of deeper defects at lower power levels.This paper provides a reference for the development of portable infrared thermography detection devices and their application in complex environments for multi-target detection.关键词
红外热波/线性调频脉冲热成像/缺陷检测/脉冲热成像Key words
infrared thermography/linear frequency modulation pulsed thermography/defect detection/pulsed thermography分类
信息技术与安全科学引用本文复制引用
梅红伟,孙锐,贾明周,蒋卓君,王黎明..改善低功率激励源红外热波检测效果的线性调频脉冲热成像技术研究[J].中国电机工程学报,2026,46(8):3466-3477,中插33,13.基金项目
国家自然科学基金项目(51977117).Project Supported by National Natural Science Foundation of China(51977117). （51977117）
