| 钢板激光光声信号低频特性分析 |
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| 引用本文： | 王阳恩,李军.钢板激光光声信号低频特性分析[J].科技信息,2009(25):21-22. |
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| 作者姓名： | 王阳恩 李军 |
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| 作者单位： | 长江大学物理科学与技术学院,湖北荆州434023 |
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| 摘 要： | 利用YAG固体激光器产生的脉冲激光照射到钢板表面，采用加速度计拾取激光产生的脉冲光声信号，对脉冲光声信号进行了功率谱分析，得出小于25kHz的低频激光光声信号是一个含有多种频率的复频信号，其功率谱峰所对应的频率大小与样品无关。
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| 关 键 词： | 激光 低频 功率谱 钢板 加速度计 |
Analyzing the Low-frequency Characteristics of Laser Photoacoustic Signal in Steel |
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| WANG Yang-en,LI Jun.Analyzing the Low-frequency Characteristics of Laser Photoacoustic Signal in Steel[J].Science,2009(25):21-22. |
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| Authors: | WANG Yang-en LI Jun |
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| Institution: | (College of Physical Science and Technology, Yangtze University, Jingzhou Hubei, 434023) |
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| Abstract: | In this paper, we have used the accelerometer to receive the photoacoustie signal which was produced from ultrasonic pulse due to caused by a pulse YAG laser in steel, then analyzed the power spectrum about it. It was found that the photoacoustic signal which frequency is less then 25kHz is a complex frequency signal which is comprised of many frequencies. The frequency of the power spectrum peaks was not influenced by the samples. |
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| Keywords: | Laser Low-frequency Power spectrum Steel Accelerometer |
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