公开(公告)号：US6105431A

公开(公告)日：2000-08-22

申请号：US945852

申请日：1997-11-07

Applicant: Colin Duffill ,  Maurice Geoffrey Silk

Inventor： Colin Duffill ,  Maurice Geoffrey Silk

IPC: G01N29/11 ,  G01N29/04

CPC classification number: G01N29/11 ,  G01N29/2487 ,  G01N29/343 ,  G01N2291/0422 ,  G01N2291/0423 ,  G01N2291/044 ,  G01N2291/057 ,  G01N2291/102 ,  G01N2291/2632

Abstract: A plate (12) or pipe wall is inspected by coupling an ultrasonic transducer (14, 16) to its surface so as to generate a compression wave or lateral wave (26) along the surface and a shear wave or head wave (28) along the surface and a shear wave or head wave (28) at the shear-compression critical angle (.theta..sub.c) The same transducer (14, 16), or an additional transducer (15, 16) also coupled to the surface, detects a series of ultrasonic peaks corresponding to each generated ultrasonic pulse. Each such detected peak corresponds to ultrasonic energy traveling, partly as lateral waves (26, 32) on one surface or the other, and partly as head waves (28, 30) crossing a certain number of times between the surfaces. The transducers (14, 15) may be over 0.5 m apart, and substantially all the intervening parts of the plate (12) are inspected.

Abstract translation: PCT No.PCT / GB96 / 01078 Sec。 371日期：1997年11月7日 102（e）日期1997年11月7日PCT提交1996年5月7日PCT公布。 出版物WO96 / 36874 日期1996年11月21日通过将超声波换能器（14,16）耦合到其表面来检查板（12）或管壁，以便沿着表面产生压缩波或横波（26），并且产生剪切波或头 沿着表面的波（28）和剪切波或头波（28）处于剪切压缩临界角（θc）。相同的换能器（14,16）或附加的换能器（15,16）也耦合到 表面，检测与每个产生的超声波脉冲相对应的一系列超声峰。 每个这样的检测到的峰值对应于在一个表面上或另一个上部分地作为横向波（26,32）行进的超声波能量，并且部分地作为在两个表面之间穿过一定次数的头波（28,30）。 换能器（14,15）可以相隔超过0.5m，并且检查板（12）的基本上所有的中间部分。

公开(公告)号：US4202216A

公开(公告)日：1980-05-13

申请号：US933032

申请日：1978-08-11

Applicant: Reginald B. Bull ,  Colin Duffill ,  Ronald A. Usmar

Inventor： Reginald B. Bull ,  Colin Duffill ,  Ronald A. Usmar

IPC: F17D5/06 ,  F17D3/00 ,  G01N29/24 ,  G01N29/28 ,  G01N29/04

CPC classification number: G01N29/2493 ,  F17D3/00

Abstract: Disclosed is a wheel probe for use on a pipe inspection vehicle. The wheel probe comprises a annular perspex outer rim with a polyurethane tire mounted on a hub assembly which, with the hub, defines a fluid-tight chamber containing an acoustic coupling fluid. A number of ultrasonic transducers are located inside the chamber and are positioned close to the inside circumferential surface of the rim. The hub assembly is carried by a spring loaded carriage which is secured through which ultrasound will pass.The wheel probe includes a guide wheel on each side. The guide wheels are carried by the carriage but are moveable bodily relative to the center of the hub assembly, and when deflected, they operate on the assembly to move the wheel probe to ensure that the outer rim of the wheel is correctly aligned relative to the pipe.The wheel probe has a number of shields spaced around its periphery. The gaps between the shields define operating "windows" through which the rim of the wheel probe projects to contact the pipe. The shields are located close to the bore of the pipe so that if the probe encounters an obstruction the shield snags on the obstruction, is pulled between the rim and the pipe to lift the wheel over the obstruction, and turns on to the next operating "window."Cam followers are provided to hold the shields in position.

Abstract translation: 公开了一种用于管道检查车辆的车轮探针。 车轮探针包括环形有机玻璃外缘，其具有安装在轮毂组件上的聚氨酯轮胎，轮毂组件与轮毂限定包含声耦合流体的流体密封腔室。 多个超声波换能器位于腔室内部并且靠近轮缘的内周面定位。 轮毂组件由弹簧加载的托架承载，该托架被固定通过超声波将通过。 车轮探头包括两侧的导轮。 引导轮由托架承载，但可相对于轮毂组件的中心身体可移动，并且当偏转时，它们在组件上操作以移动车轮探针，以确保车轮的外缘相对于车轮的正确对准 管。 车轮探头具有围绕其周边间隔开的多个护罩。 屏蔽之间的间隙限定了操作“窗口”，轮子探针的边缘突出通过该窗口与管道接触。 屏蔽件位于管道的孔附近，使得如果探头遇到障碍物，则阻塞物上的屏蔽物阻塞物被拉到边缘和管道之间以将轮提升到阻塞物上，并且转到下一个操作的“ 窗口。” 提供凸轮从动件将挡板保持在适当位置。