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

US06843131B2 Method of detecting discontinuities on elongated workpieces 失效
标题翻译：检测细长工件不连续性的方法
公开(公告)号：US06843131B2
公开(公告)日：2005-01-18
申请号：US10425997
申请日：2003-04-29
申请人： Alfred Graff , Friedhelm Schlawne
发明人： Alfred Graff , Friedhelm Schlawne
IPC分类号： G01N29/11 , G01N29/275 , G01N29/34 , G01N29/44 , G01N29/10
CPC分类号： G01N29/343 , G01N29/11 , G01N29/275 , G01N29/4445 , G01N2291/011 , G01N2291/0423 , G01N2291/044 , G01N2291/2634
摘要： In a method of detecting discontinuities on elongated workpieces, in particular tubes and bars, using ultrasonic testing system, a test object is positioned in relationship to a test head of the testing system, with the test object and the test head being moveable to one another. Signals from the test head are transmitted to an evaluation unit, where they are digitized and evaluated. The digitized signals of a test shot of a length position X are compared with digitized signals of a test shot of a length position X+ΔX, wherein ΔX is a multiple of a shot distance, and the difference is evaluated.
摘要翻译：在使用超声测试系统检测细长工件，特别是管和棒上的不连续性的方法中，测试对象与测试系统的测试头相关联，测试对象和测试头可彼此移动。来自测试头的信号被传送到评估单元，在那里它们被数字化和评估。将长度位置X的测试镜头的数字化信号与长度位置X + DeltaX的测试镜头的数字化信号进行比较，其中DeltaX是拍摄距离的倍数，并且评估差异。

2. 发明授权

US4817431A Defect detection in cylindrical objects 失效
标题翻译：圆柱形物体缺陷检测
公开(公告)号：US4817431A
公开(公告)日：1989-04-04
申请号：US69417
申请日：1987-07-01
申请人： Friedhelm Schlawne
发明人： Friedhelm Schlawne
IPC分类号： G01N29/04 , G01N29/07 , G01N29/11 , G01N29/34 , G01N29/38 , G01N29/44 , G01N29/48
CPC分类号： G01N29/4454 , G01N29/07 , G01N29/11 , G01N29/343 , G01N29/38 , G01N29/48 , G01N2291/011 , G01N2291/044 , G01N2291/048 , G01N2291/2626 , G01N2291/2634 , G01N2291/2636
摘要： Defects are detected in cylindrical rods, tubes or the like by a stationary transmission and receiving device arranged along the path which the test object passes axially by providing per test cycle a particular pulse being split for propagating bidirectionally azimuthally in the test object; both pulses are received repeatedly, once per circulation, so that a plurality of pulses appear with gradually declining amplitude; a sequence of burst signals, each of limited duration, is provided for purposes of timing and gating the burst being repeated per circulation on the basis of the expected and known propagation time between transmission and receiving portions; peaks of the received signal are detected once or twice per circulation and in synchronism with the timing and gating signal; the respective detected peak signals are digitized, summed in groups and the quotient of the sums is formed as quality indicator.
摘要翻译：通过沿测试对象轴向通过的路径布置的固定传输和接收装置检测缺陷，通过向每个测试周期提供被分离以在测试对象中双向方位传播的特定脉冲; 每个循环一次接收两个脉冲，使得随着振幅逐渐下降而出现多个脉冲; 提供每个有限持续时间的突发信号序列，用于基于传输和接收部分之间的预期和已知传播时间来定时和选通每个循环重复的突发的目的; 每个循环检测一次或两次接收信号的峰值，并与定时和门控信号同步; 相应的检测到的峰值信号被数字化，并且以组合为一个，并且将这些乘数形成为质量指示符。

3. 发明授权

US5679898A Process and device for detecting flaws on stretched workpieces, especially tubes and bars 失效
标题翻译：用于检测拉伸工件，特别是管和棒的缺陷的工艺和装置
公开(公告)号：US5679898A
公开(公告)日：1997-10-21
申请号：US627938
申请日：1996-03-28
申请人： Friedhelm Schlawne , Heinz Schneider
发明人： Friedhelm Schlawne , Heinz Schneider
IPC分类号： G01N29/04 , G01N29/11 , G01N29/22 , G01N29/40
CPC分类号： G01N29/11 , G01N29/041 , G01N29/222 , G01N29/343 , G01N29/40 , G01N29/4454 , G01N2291/0425 , G01N2291/044 , G01N2291/2634
摘要： A process for detecting flaws on stretched workpieces, especially tubes and bars, in which the test specimen is passed in the axial direction and without rotation by fixed electrodynamic transducers arranged separately in the peripheral direction. Wave pulses travelling in both peripheral directions are generated in the test specimen at different locations in alternating fashion in the test cycle, and the location of reception for the reflection signals is different from that for the transmission signals. The wave pulses travelling in both directions are generated at at least four locations separated symmetrically from one another in the peripheral direction in alternating fashion in the test cycle. Each particular sequence of reception signals is evaluated separately, and for each cycle the reception signal and a burst signal are fed to a peak detector and the output signal of the peak detector is transmitted in digital form to a computer. The device for carrying out the process includes electrodynamic transducers, which have separate transmitting and receiving coils, and lie on a peripheral plane, and are staggered around the perimeter of the test specimens. The transducers are arranged in a fixed manner, and are connected to an analysis unit. The device calls for 2.multidot.n transducers, where n>2, arranged symmetrically around the perimeter, whereby every two transducers are placed together on one transducer carrier and the spacing of the transducer carriers is 360.degree./n. Furthermore, each transducer has its own local electronics system and its own analysis channel.
摘要翻译：用于检测拉伸工件，特别是管和棒的缺陷的方法，其中试样在轴向方向上通过并且不沿周向方向分开布置的固定电动换能器旋转。在测试周期中以交替的方式在测试样本中在不同位置处产生在两个周向上行进的波脉冲，并且反射信号的接收位置与传输信号的接收位置不同。在两个方向上行进的波脉冲在测试周期中以交替的方式在周向方向上彼此对称分开的至少四个位置产生。每个特定的接收信号序列被分别评估，并且对于每个周期，接收信号和突发信号被馈送到峰值检测器，并且峰值检测器的输出信号以数字形式传送到计算机。用于执行该过程的装置包括电动换能器，其具有分开的传输和接收线圈，并且位于外围平面上，并且围绕测试样本的周边交错。传感器以固定的方式布置，并连接到分析单元。该设备需要2xn个传感器，其中n> 2，围绕周边对称布置，由此每两个换能器放置在一个换能器载体上，换能器载体的间距为360°/ n。此外，每个换能器都有自己的本地电子系统和自己的分析通道。

4. 发明授权

US5050703A Electrodynamic transducer head 失效
标题翻译：电动换能器头
公开(公告)号：US5050703A
公开(公告)日：1991-09-24
申请号：US417329
申请日：1989-10-05
申请人： Alfred Graff , Friedhelm Schlawne , Michael Wachter , Wolfgang Bottger
发明人： Alfred Graff , Friedhelm Schlawne , Michael Wachter , Wolfgang Bottger
IPC分类号： G01N29/24
CPC分类号： G01N29/2412 , G01N2291/0427
摘要： The invention furnishes an electrodynamic transducer head for a non-destructive testing of workpieces with electrically conductive surfaces by way of ultrasound. A magnet system is employed for generating of a static or a low-frequency magnet field, and at least one transducer coil is disposed at the front face of the magnet system disposed toward the workpiece. The transducer coil is furnished on the side toward the workpiece with a wear-resistant layer, and the transducer coil exhibits between itself and this front face of the magnet system an intermediate part with an insulating layer, which is solidly connected with the front face and with the coil adjoining at the insulating layer. The invention discloses production of a transducer coil, in a way which is simple and economical and results in a transducer head which can be universally employed, and where the eddy current formations, resulting in interfering signals, and the mechanical vibrations, both in the transducer coil as well as in the magnet system, are substantially suppressed or, respectively, damped. The intermediate part (10) comprises at least two layers (11, 12), where one of the layers (12) is electrically conductive and which layer ( 12) is made of a material thickness which is larger than the skin depth for a given high-frequency field.
摘要翻译：本发明提供一种用于通过超声波对具有导电表面的工件的非破坏性测试的电动变换器头。使用磁体系统来产生静态或低频磁场，并且至少一个换能器线圈设置在朝向工件设置的磁体系统的前表面处。换能器线圈的侧面朝向工件设置有耐磨层，并且换能器线圈在其本身与磁体系统的该前表面之间呈现具有绝缘层的中间部分，该中间部分与前表面牢固地连接，线圈与绝缘层相邻。本发明公开了一种换能器线圈的生产方法，其方法简单经济，并且可以在传感器中产生传感器头，并且在传感器中产生干扰信号和机械振动线圈以及磁体系统基本上被抑制或分别阻尼。中间部分（10）包括至少两个层（11,12），其中一个层（12）是导电的，并且哪个层（12）由对于给定的层（12）的材料厚度大于皮肤深度高频场。

5. 发明授权

US4732040A Electrodynamically producing ultrasonic waves 失效
标题翻译：电动生产超声波
公开(公告)号：US4732040A
公开(公告)日：1988-03-22
申请号：US807863
申请日：1985-12-11
申请人： Wolfgang Boettger , Friedhelm Schlawne , Willi Weingarten , Heinz Schneider
发明人： Wolfgang Boettger , Friedhelm Schlawne , Willi Weingarten , Heinz Schneider
IPC分类号： H04R23/00 , B06B1/04 , G01N29/04 , G01N29/24 , H04R1/00 , H04R9/00
CPC分类号： B06B1/04 , G01N29/2412 , G01N2291/0423 , G01N2291/0427
摘要： An electrodynamic transducing device includes two staggerdly coils with a distance of staggering equal to a quarter of a wavelength of ultrasonic waves; unidirectional transmission characteristics of the transducer is obtained by feeding the two coils separately with HF current at a time difference of feeding of the respective two signals to be equal to a quarter of the wavelength such that a reinforcing ultrasonic signal is produced in the direction of the coil receiving said signal earlier in time and complete cancelation of acoustic waves obtains in the opposite direction, whereby in case of equal pitch of said coils the HF signals are of equal contour but of opposite polarity while in case of opposite winding pitch the signals not only have equal signal contour but also the same polarity.
摘要翻译：电动转换装置包括两个交错线圈，其交错距离等于超声波波长的四分之一; 通过在两个信号的馈送时间差与HF电流分开地馈送两个线圈以等于四分之一波长来获得换能器的单向传输特性，使得沿着方向产生加强超声波信号线圈在时间上较早地接收所述信号，并且完全取消声波在相反方向上获得，由此在所述线圈的相等间距的情况下，HF信号具有相等的轮廓但具有相反的极性，而在相反绕组间距的情况下，信号不仅具有相等的信号轮廓，但也具有相同的极性。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式