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.

 

　　本發(fā)明涉及，在產(chǎn)生任何顯著腐蝕損耗之前，非常精確地測(cè)量管壁厚度變化以確定腐蝕速率。厚度由超聲波檢測(cè)，其中所述壁的厚度的許多測(cè)量是在同一位置由一個(gè)固定的傳感器，并與噪聲和溫度的變化相關(guān)聯(lián)的誤差基本上消除所確定。一個(gè)高度敏感的接收器將每個(gè)反射脈沖轉(zhuǎn)換，使其與其他測(cè)量脈沖波相平均。將所得到的平均波進(jìn)行分析，以便對(duì)每個(gè)波形進(jìn)行分析，以確定每個(gè)反射脈沖的極值點(diǎn)和轉(zhuǎn)折點(diǎn)。所得到的分析提供了一個(gè)更為精確地反射脈沖之間的時(shí)間。其結(jié)果，腐蝕所在管壁位置的更精確的圖象可以在星期內(nèi)以高精度來(lái)確定。