| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve accuracy of estimating a blockage ratio or a scale adhesion thickness. <P>SOLUTION: In an attachment measuring device 60 which comprises a heat exchange tube, and a tube supporting plate with an insertion hole to insert the heat exchange tube therein, the insertion hole performs as a heat exchanger with N number of protrusion sections arranged in a peripheral direction of the heat exchange tube. The attachment measuring device 60 estimates a blockage ratio of a gap portion existing between a wall surface of the insertion hole and an external surface of the heat exchange tube or a thickness of an attachment attached to the gap portion. The attachment measuring device 60 also has an eddy current flaw detection probe 61 to acquire a flaw detection signal by scanning inside of the heat exchange tube with a sensor, and a processing device 62 to estimate the blockage ratio of the gap portion or the thickness of the attachment attached to the gap portion using the flaw detection signal of the gap portion at the supporting plate protrusion sections in the insertion hole. <P>COPYRIGHT: (C)2012,JPO&INPIT |
