摘要
介绍了一种新型的激光扫描热波成像无损检测技术,阐述了该技术的基本原理及特点,并与传统采用闪光灯进行热激励的热波无损检测技术进行了比较。简要介绍了适合于激光线扫描热激励的2-D温度场理论模型,并通过实验结果进行了验证。采用该技术对航空领域常见的几种试件进行了测试,验证了该项技术的有效性。根据激光扫描热激励所产生的热波具有二维热传导的特性,开展了对垂直于试件表面的裂纹进行检测的实验。同时利用激光扫描的特性,介绍了一种新颖的涂层厚度的测量方法,并对不同厚度的涂层模拟样品进行了检测,展示了该项新技术对航空领域多种常见缺陷的检测能力。
In this paper, a new nondestructive testing technology of laser scanning thermal wave imaging was introduced. The basic principles and characteristics of the technology were defined, and moreover, it was compared with the traditional thermal wave nondestructive testing technology with the thermal excitation of a traditional flash lamp. A theoretical model of the 2-D temperature field suitable for the laser line scanning thermal excitation was briefly introduced and verified by the experimental results. Several common types of samples in the field of aviation were tested using this technology, and the effectiveness of the technology was thus verified. According to the characteristics of 2-D heat conduction generated by a laser scanning thermal excitation, experiments were carried out to detect cracks perpendicular to the surface of the specimen. Simultaneously, a new method of measuring the coating thickness was introduced, and the simulated samples with different thickness were detected. Therefore, the ability to detect a variety of common defects in the aviation field was demonstrated.
作者
江海军
陈力
JIANG Haijun,CHEN Li(Novelteq-Ltd., Nanjing 210046, Chin)
出处
《红外技术》
CSCD
北大核心
2018年第6期618-623,共6页
Infrared Technology
基金
科技部科技型中小企业创新基金<基于激光扫描热波成像技术的飞行器在役无损检测系统>(14C26213201110)
关键词
无损检测
激光扫描
热波成像
涂层检测
nondestructive testing
laser scanning
thermal wave thermography
special coating
作者简介
江海军（1988-）,男,硕士,工程师,主要从事红外无损检测研究工作.
