US 20110067497 A1

 

　　The invention relates to very precisely measuring changes in thickness of pipe walls to determine corrosion rate prior to any significant corrosion loss. The thickness is determined by ultrasonic testing where many measurements of the wall thickness are taken at the same spot by a fixed sensor and errors associated with noise and temperature changes are substantially eliminated. A highly sensitive receiver converts each reflected pulse to waves that are averaged with other pulse measurements. The resulting average wave is analyzed so that each waveform is analyzed to identify the extrema and inflection points of each reflected pulse. The resulting analysis provides a far more accurate determination of the time between reflected pulses. As a result, a far more accurate picture of corrosion at the location of the wall of the pipe can be determined within weeks with a high degree of confidence.

 

　　本发明涉及，在产生任何显着腐蚀损耗之前，非常精确地测量管壁厚度变化以确定腐蚀速率。厚度由超声波检测，其中所述壁的厚度的许多测量是在同一位置由一个固定的传感器，并与噪声和温度的变化相关联的误差基本上消除所确定。一个高度敏感的接收器将每个反射脉冲转换，使其与其他测量脉冲波相平均。将所得到的平均波进行分析，以便对每个波形进行分析，以确定每个反射脉冲的极值点和转折点。所得到的分析提供了一个更为精确地反射脉冲之间的时间。其结果，腐蚀所在管壁位置的更精确的图象可以在星期内以高精度来确定。