Non-contact detection of low carbon steel using laser generated ultrasound at high temperature

被引：14
|
作者：
Guo Ruipeng [1 ]
Wang Haitao [1 ]
Zhang Jianyan [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Coll Automat Engn, 29 Jiangun Rd, Nanjing 211106, Jiangsu, Peoples R China
来源：
OPTIK | 2017年 / 136卷
关键词：
High temperature; Laser ultrasound; Surface acoustic wave; Non-contact; INSPECTION SYSTEM; BISMUTH TITANATE; TRANSDUCERS; LINE;
D O I：
10.1016/j.ijleo.2017.02.072
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Theoretical and experimental studies on non-contact detection of high temperature metal using laser ultrasound are carried out. Based on the theory of laser ultrasound, effects of high temperature on the laser generated surface acoustic wave (SAW) are discussed. Results of simulation show that the velocity and the amplitude of SAW will decrease with the increase of the temperature. An experimental system was set up, which in a non-contact mode, by utilizing a point laser source to generate the SAW, and an interferometer to detect the SAW signal. The corresponding experimental results have verified the feasibility of the numerical simulation and the achieved result of the relationship between the velocity of SAW and the temperature. The research findings provide a potential application for online monitoring of high temperature metal. (C) 2017 Elsevier GmbH. All rights reserved.
引用
收藏
页码：536 / 542
页数：7
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