ASTMbiaozhun

jianfujian第二章 超声探伤理论

2.1探伤方程式

  从发射信号开始，经过超声波传播，发射波反射回来，在显示屏上反射波的高度h的关系可以表述为：

         hfile:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtmlclip1/01/clip_image002.gif       [2-1]

  式中，file:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtmlclip1/01/clip_image004.gif-电声转换系数，file:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtmlclip1/01/clip_image006.gif-徃声场，r-反射系数，file:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtmlclip1/01/clip_image008.gif-归声场，file:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtmlclip1/01/clip_image010.gif-声电转换系数，AF-增益，B-电光转换file:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtmlclip1/01/clip_image012.gif