用最小值法提高水平连铸圆坯超声探伤的信噪比  

Enhancing of ultrasonic inspection SNR for HCC rounds with minimization algorithm

作　　者：左建国 

机构地区：[1]衡阳钢管厂

出　　处：《连铸》1998年第1期36-38,33,共4页Continuous Casting

摘　　要：采用超声纵波来检测水平连铸圆管坯的内部质量时,由于粗大晶粒及各向异性的影响,将产生不同程度的组织散射噪声,从而降低了材料超声探伤的一个重要参数—信噪比。本文采用最小值法对原始探伤信号进行处理,有效地抑制了材料的组织散射噪声,信噪比得到大幅度提高。When longitudinal ultrasonic is used to inspect the inner quality of horizontal continuous casting (HCC) rounds, structure-scattered noise with various intensity will occur because of the influence of coarse grains and inhomo-geneity so that the signal-to-noise ratio (SNR), a very important parameter in the ultrasonic inspection of materials is reduced. In this paper, the minimization algorithm is employed to process the original ultrasonic detecting signals and the structure-scattered noise in materials suppressed efficiently, SNR enhanced enormously.

关 键 词：圆管坯 水平连铸 信噪比 超声波探伤 最小值法 

分 类 号：TF777.6[冶金工程—钢铁冶金] TG115.285[金属学及工艺—物理冶金]