公开(公告)号：US4367646A

公开(公告)日：1983-01-11

申请号：US204961

申请日：1980-11-07

申请人： J. Hunter Allen, Sr. ,  Amos L. Gillespie, Jr. ,  George D. Johnson

发明人： J. Hunter Allen, Sr. ,  Amos L. Gillespie, Jr. ,  George D. Johnson

IPC分类号： G01B13/10 ,  G01B13/22

CPC分类号： G01B13/10

摘要： A method and apparatus for detecting, measuring the extent of and locating localized areas of deterioration, such as pitting, in the interior walls of tubing or other hollow objects. A cylindrical pneumatic probe with its air input side connected to a constant flow source of pressurized air and having a transversely extending baffle ring with a sharp outer edge across which the flow of air from said source is directed through the sharp edged orifice created between the baffle ring sharp outer edge and the tube inner wall and a pressure transducer connected to the probe air input air generates signals transmitted to a visual recording device connected to the pressure transducer. In the method the pneumatic probe having its thin outer edged baffle ring of a diameter closely matching that of the tube interior to be inspected is connected to a constant pressure air source. The probe is inserted into a flawless tube base standard test tube having a diameter equal to the tube to be inspected and a constant flow of air is passed through the probe with the back pressure generated by the base standard test tube being measured and established as a zero based value. The probe is then inserted into a succession of flawless calibration tubes of increasing size increments and the back pressure is recorded for each successive calibration tube in relationship to the zero base value. The tube is then inserted into and passed along a length of a tube to be inspected and the measured back pressure is recorded for each increment of length of the tube with respect to the zero based value and back pressure generated by the succession of flawless tube of increased diameter.

摘要翻译： 一种用于检测，测量在管道或其它中空物体的内壁中的局部区域的恶化程度（例如点蚀）和定位的方法和装置。 一种圆柱形气动探针，其空气输入侧连接到恒定的加压空气流动源，并具有横向延伸的挡板环，其具有尖锐的外缘，来自所述源的空气流通过该外缘引导通过在挡板之间产生的锋利的边缘孔 环形锋利的外边缘和管内壁以及连接到探头空气输入空气的压力传感器产生传输到连接到压力传感器的视觉记录装置的信号。 在该方法中，其具有与要检查的管内部的直径密切相同直径的薄的外边缘挡板的气动探针连接到恒压空气源。 将探针插入直径等于要检查管的无瑕疵的管底标准试管中，并且恒定的空气流通过探针，由基准标准试管产生的背压被测量并建立为 零基值。 然后将探头插入一系列增加尺寸增量的无瑕疵的校准管，并记录每个连续校准管的背压与零基值的关系。 然后将管插入并沿着要检查的管的长度通过，并且针对管的长度的每个增量记录测量的背压，相对于零基值和由无瑕疵管的连续产生的背压 增加直径。