专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4258319A Surface defect detecting apparatus for use with rotating circularly shaped metallic material 失效
标题翻译：用于旋转圆形金属材料的表面缺陷检测装置
公开(公告)号：US4258319A
公开(公告)日：1981-03-24
申请号：US940155
申请日：1978-09-05
申请人： Katsuhiko Shimada , Isamu Komine , Hideya Tanabe , Shuichi Tsunozaki , Masayoshi Yamada , Tsuguo Takahashi
发明人： Katsuhiko Shimada , Isamu Komine , Hideya Tanabe , Shuichi Tsunozaki , Masayoshi Yamada , Tsuguo Takahashi
IPC分类号： G01N27/82 , G01N27/90 , G01N27/72 , G01R33/00 , G01R33/12
CPC分类号： G01N27/9046 , G01N27/9013
摘要： The surface defect detecting apparatus for rotating cylindrical metal pieces which move in a lengthwise direction relative to a sensor block, has a plurality of eddy-current flaw detecting coils facing the test piece. The sensor block rotates about a horizontal axis extending vertically with respect to the axis of the test piece to follow up deflections of the test piece in the direction of the axis of rotation. Front and rear ends of the sensor block, have a pair of guide wheels that engage the piece; also present are color marking nozzles for marking defective areas in response to detector signals. Relative movement in the longitudinal direction of the test piece is carried out by means of a carriage carrying the sensor block. Each guide wheel is spaced from another in a plane transverse to the longitudinal direction of the test piece. A number of coils with designated impedances are connected to a generator and are disposed in longitudinal direction of the test piece in a single sensor holder within the sensor block. The holder has turning wheels at front and rear ends thereof in a longitudinal direction of the test piece, and are each positioned between the guide wheels in a direction for spiral scanning, and in rotatable contact with the outer surface of the test piece. Impedances of the coils are selected to allow feedback amplifiers to form a feedback circuit with two of the coils and are linear for eddy-current signals corresponding to different flaw depth ranges. Signals of a detector unit associated with different flaw depth range are amplified within the linear characteristic range and supplied to nozzles which spray different colors depending on flaw depth.
摘要翻译：用于旋转相对于传感器块在长度方向上移动的圆柱形金属片的表面缺陷检测装置具有面向试验片的多个涡流探伤线圈。传感器块围绕相对于测试件的轴线垂直延伸的水平轴线旋转，以沿着旋转轴线的方向跟随测试件的偏转。传感器块的前端和后端具有一对与该片接合的导向轮; 还存在用于响应于检测器信号来标记缺陷区域的彩色标记喷嘴。通过承载传感器块的滑架来进行试验片纵向的相对运动。每个导轮在与试件的纵向方向横切的平面中与另一个导轮间隔开。具有指定阻抗的多个线圈连接到发电机，并且在测试片的纵向方向上设置在传感器块内的单个传感器保持器中。保持器在试验片的长度方向的前端和后端具有转动轮，并且沿着螺旋形扫描的方向位于导向轮之间，并且与试验片的外表面可旋转接触。选择线圈的阻抗以允许反馈放大器形成具有两个线圈的反馈电路，并且对应于不同缺陷深度范围的涡流信号是线性的。与不同裂纹深度范围相关联的检测器单元的信号在线性特征范围内被放大并提供给根据缺陷深度喷射不同颜色的喷嘴。

IPRDB

热门服务

关于我们

友情链接

联系方式