公开(公告)号：US5359416A

公开(公告)日：1994-10-25

申请号：US963572

申请日：1992-10-19

Applicant: Mark K. Mueller

Inventor： Mark K. Mueller

IPC: G01N21/95 ,  G01N21/47

CPC classification number: G01N21/9515 ,  G01N2021/8864 ,  G01N2021/8887 ,  G01N2021/9518 ,  G01N2201/102 ,  G01N2201/1085

Abstract: A system and process for detecting and monitoring defects in large surfaces such as the field joints of the container segments of a space shuttle booster motor. Beams of semi-collimated light from three non-parallel fiber optic light panels are directed at a region of the surface at non-normal angles of expected incidence. A video camera gathers some portion of the light that is reflected at an angle other than the angle of expected reflectance, and generates signals which are analyzed to discern defects in the surface. The analysis may be performed by visual inspection of an image on a video monitor, or by inspection of filtered or otherwise processed images. In one alternative embodiment, successive predetermined regions of the surface are aligned with the light source before illumination, thereby permitting efficient detection of defects in a large surface. Such alignment is performed by using a line scan gauge to sense the light which passes through an aperture in the surface. In another embodiment a digital map of the surface is created, thereby permitting the maintenance of records detailing changes in the location or size of defects as the container segment is refurbished and re-used. The defect detection apparatus may also be advantageously mounted on a fixture which engages the edge of a container segment.

Abstract translation: 用于检测和监测诸如航天飞机增压马达的容器段的大面积的缺陷的系统和过程。 来自三个非平行光纤光板的半准直光束是指以预定入射角为非正常角度的表面区域。 视频摄像机收集除了预期反射角度之外的角度反射的光的一部分，并产生被分析的信号以辨别表面中的缺陷。 分析可以通过目视检查视频监视器上的图像，或者通过检查过滤的或以其他方式处理的图像来执行。 在一个替代实施例中，表面的连续预定区域在照射之前与光源对准，从而允许有效地检测大表面中的缺陷。 通过使用线扫描仪来感测通过表面中的孔的光来进行这种对准。 在另一个实施例中，创建表面的数字地图，从而允许维护记录，以便在容器段被翻新和重新使用时详细描述缺陷的位置或尺寸的变化。 缺陷检测装置还可以有利地安装在与容器段的边缘接合的固定件上。

公开(公告)号：US5164603A

公开(公告)日：1992-11-17

申请号：US731038

申请日：1991-07-16

Applicant: Nile F. Hartman ,  James W. Larsen ,  Carl M. Verber

Inventor： Nile F. Hartman ,  James W. Larsen ,  Carl M. Verber

IPC: G01N21/59 ,  G01N21/86 ,  G01N21/88 ,  G01N21/89 ,  G01N21/892 ,  G01N21/93

CPC classification number: G01N21/8901 ,  G01N2021/4711 ,  G01N2021/5961 ,  G01N2021/8627 ,  G01N2201/0233 ,  G01N2201/04 ,  G01N2201/1085

Abstract: An apparatus 10 for inspecting the surface of an object S moving in the direction of travel 23 relative to the apparatus comprises a modular sensing head assembly 11 including a plurality of sensing head modules 12, 13, each of which includes a number of sensing stations 16-21. Each sensing station includes a light source 77, 81, 84 for generating a line of light extending across substantially the width of the surface of the object and a plurality of optical detector means for detecting light scattered from the line of light by the surface of the object. The optical detectors are positioned and oriented to receive scattered light scattered along paths lying in detection planes which are perpendicular to each other and perpendicular to the surface of the object. Signal processing electronics are provided to convert the light received by the detectors into analog signals which are multiplexed, converted to digital signals, filtered and then compared to preselected thresholds to determine the existence of any defects in the surface.

Abstract translation: 用于检查在行进方向23相对于设备移动的物体S的表面的装置10包括：模块化感测头组件11，包括多个感测头模块12,13，每个检测头模块12,13包括多个感测站16 -21。 每个感测站包括用于产生延伸穿过物体表面的宽度的光线的光源77,81,84;以及多个光学检测器装置，用于检测从该光线的表面散射的光 目的。 光学检测器被定位和定向成接收沿着彼此垂直并且垂直于物体表面的检测平面中的路径散射的散射光。 提供信号处理电子设备以将由检测器接收的光转换成模拟信号，该模拟信号被多路复用，转换成数字信号，经过滤波，然后与预先选择的阈值进行比较，以确定表面存在任何缺陷。

公开(公告)号：US4969746A

公开(公告)日：1990-11-13

申请号：US239893

申请日：1988-09-02

Applicant: Bain C. McConnell ,  Clifford R. Marritt ,  John L. Nelson ,  Kenneth W. White

Inventor： Bain C. McConnell ,  Clifford R. Marritt ,  John L. Nelson ,  Kenneth W. White

IPC: A24C5/34 ,  G01N21/952

CPC classification number: G01N21/952 ,  A24C5/3412 ,  G01N2201/1085

Abstract: The apparatus of the invention comprises a lighting device for illuminating a component to be inspected to form a halo of light around a periphery of the component and a system for comparing the shape of the halo of light to a known acceptable shape. A camera may be used to detect the halo and a programmed computer may be used to perform image analysis of the shape of the halo to determine if it conforms to an acceptable shape.

Abstract translation: 本发明的装置包括照明装置，用于照亮待检查的部件以在部件的周边周围形成光晕，以及用于将光晕的形状与已知可接受的形状进行比较的系统。 可以使用相机来检测光晕，并且可以使用编程的计算机来执行光晕形状的图像分析，以确定其是否符合可接受的形状。