自然科学版
陕西师范大学学报(自然科学版)
物理学
基于声参量的金属材料辨识方法
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田彦平1 , 贺西平1*, 张宏普1 , 贺升平2
(1 陕西师范大学 物理学与信息技术学院, 陕西省超声学重点实验室, 陕西 西安 710119;2 陕西省宝鸡市150信箱11号, 陕西 宝鸡 721013)
田彦平,女 ,硕士研究生,研究方向为超声检测.E-mail:tianyanping.2@163.com.
摘要:
以3种不同的金属材料(其中同种材料采用不同条件热处理)为例,利用一次和二次底面回波测试,计算了材料的声速、声衰减系数、一次底面回波的幅度谱、功率谱的峰值频率及带宽,利用超声波与不同材料(对应的显微结构不同)相互作用,引起的声波能量损失和传播速度变化的不同,研究了以此进行直接和间接辨识金属材料的方法.该方法可用于贵重金属材料或珍贵金属藏品的防伪辨识.
关键词:
超声波; 金属材料; 辨识
收稿日期:
2013-09-12
中图分类号:
O426.9
文献标识码:
A
文章编号:
1672-4291(2014)03-0034-07
基金项目:
国家自然科学基金资助项目(11374201).
Doi:
The acoustic parameters of preliminary research on the identification of metal materials
TIAN Yanping1, HE Xiping1*, ZHANG Hongpu1, HE Shengping2
(1 College of Physics and Information Technology, Shaanxi Key Laboratory of Ultrasonic, Shaanxi Normal University, Xi′an 710119, Shaanxi, China; 2 11 Subbox, 150 mailbox, Baoji 721013, Shaanxi, China )
Abstract:
Three different kinds of metal materials with same material treated under different heat treatment conditions are taken for examples. Based on the evidence that the loss of acoustic energy and the change of velocity of wave propagation are dependant on the interreaction of ultrasound and metal material with different microstructure.The methods of direct and indirect identification of metal material are studied by means of the tested and calculated velocities of wave propagation, attenuation coefficients, the peak frequency and bandwidth of the first bottom echo amplitude spectrum and power spectrum in metal material. The methods described here can also be applied in anti-counterfeiting techniques for precious metal or precious metal collection.
KeyWords:
ultrasonic wave; metal materials; identification