公开(公告)号：US5841138A

公开(公告)日：1998-11-24

申请号：US763245

申请日：1996-12-10

Applicant: Helmut Prekel ,  Horst Adams

Inventor： Helmut Prekel ,  Horst Adams

IPC: G01B11/06 ,  G01N21/71 ,  G01N15/08

CPC classification number: G01B11/0658 ,  G01B21/085 ,  G01N21/71

Abstract: A nondestructive workpiece testing method and apparatus are provided, wherein an electromagnetic, intensity modulated excitation beam is directed at a point of examination on a workpiece surface, and wherein thermal radiation emitted by the point of examination is detected and evaluated, the excitation beam being guided periodically in different directions in each one of which it is directed at a different point of examination on a workpiece surface. Moreover, an apparatus is provided for nondestructive workpiece testing, comprising an excitation source for the emission of an electromagnetic excitation beam, an optical means to modulate the intensity of the excitation beam and to direct the excitation beam at a point of examination on a workpiece surface, further comprising a detector means to detect the thermal radiation emitted by the point of examination. The optical means comprises modulating means for periodically deflecting the excitation beam in different directions as well as directional means for directing the excitation beam in each direction at a different point of examination on a workpiece surface.

Abstract translation: 提供了一种非破坏性的工件测试方法和装置，其中电磁强度调制的激发光束被引导到工件表面上的检查点，并且其中检测和评估由检查点发射的热辐射，激发光束被引导 周期性地在不同的方向上，其中每个方向被指向在工件表面上的不同检查点。 此外，提供了一种用于非破坏性工件测试的装置，其包括用于发射电磁激励光束的激发源，用于调制激发光束的强度的光学装置，并且将激发光束在检测点处引导到工件表面上 ，还包括检测器，用于检测由所述检查点发射的热辐射。 光学装置包括用于在不同方向周期性地偏转激发光束的调制装置以及用于在不同的检查点在工件表面上沿各个方向引导激发光束的定向装置。

公开(公告)号：US5803606A

公开(公告)日：1998-09-08

申请号：US637822

申请日：1996-05-08

Applicant: Harald Petry ,  Helmut Prekel

Inventor： Harald Petry ,  Helmut Prekel

IPC: G01N25/72 ,  G01B11/06 ,  G01N21/17 ,  G01N21/71 ,  G01N25/20 ,  G01N25/00

CPC classification number: G01B11/0658 ,  G01N21/171 ,  G01N25/72

Abstract: In a device for photothermically testing a surface (1) of a moving test specimen (2), an excitation beam (5) may be applied to a test area (13). The excitation beam (5) passes through an aperture (12) in a collecting lens (11) that reproduces the thermal radiation generated in a measuring area (14), so that the collecting lens (11) may be adapted to a wavelength of the excitation beam (5) passed to a detector (20). A coupling mirror (9) mounted in the path of excitation beam (5) has practically total reflectivity for the wavelength of the excitation beam (5) and is arranged in such a way that it is very small near the focal area of the excitation beam (5), so that together with the aperture (12) of the collecting lens (11) it only masks a small part of the thermal radiation (17) passed to the detector (20). In another embodiment, the excitation beam (5) falls directly on the surface (1) through an aperture in the decoupling mirror that deflects the thermal radiation, whereas the thermal radiation can be passed with practically all is intensity to the detector (20) through the decoupling mirror with appropriate reflectivity.

Abstract translation: PCT No.PCT / DE94 / 01448 Sec。 371日期：1996年5月8日 102（e）日期1996年5月8日PCT 1994年12月7日PCT PCT。 WO95 / 16907 PCT出版物 日期：1995年6月22日在用于对移动试件（2）的表面（1）进行光热测试的装置中，可以将激励光束（5）施加到测试区域（13）。 激发光束（5）穿过收集透镜（11）中的孔（12），聚光透镜（12）再现在测量区域（14）中产生的热辐射，使得聚光透镜（11）可以适应于 激发光束（5）传递到检测器（20）。 安装在激励光束（5）的路径中的耦合镜（9）实际上具有用于激发光束（5）的波长的全反射率，并且被布置成使得其在激发束的聚焦区域附近非常小 （5），使得与收集透镜（11）的孔（12）一起仅遮蔽传递到检测器（20）的热辐射（17）的一小部分。 在另一个实施例中，激发光束（5）通过去耦反射镜中的孔直接落在表面（1）上，该孔使热辐射偏转，而热辐射几乎全部通过强度传递到检测器（20），通过 具有适当反射率的去耦镜。

公开(公告)号：US5760400A

公开(公告)日：1998-06-02

申请号：US675410

申请日：1996-07-02

Applicant: Helmut Prekel ,  Horst Adams

Inventor： Helmut Prekel ,  Horst Adams

IPC: G01B11/06 ,  G01B21/08 ,  G01N21/17 ,  G01N21/71 ,  G01N21/01

CPC classification number: G01N21/171 ,  G01B11/0658 ,  G01B21/085

Abstract: A method for photothermally testing workpieces, which includes the steps of directing an electromagnetic excitation beam to a desired measuring point on the workpiece surface, detecting and evaluating the heat in the form of thermal radiation which is generated by the excitation beam at the measuring point with the aid of a measuring head; directing two visible locating beams to the workpiece surface, the two locating beams intersecting at a point of intersection; and correcting the relative position between the workpiece and the measuring head so that the point of intersection and the desired measuring point coincide on the workpiece surface.

Abstract translation: 一种用于光热测试工件的方法，其包括以下步骤：将电磁激发光束引导到工件表面上的期望测量点，检测和评估由在测量点处的激发光束产生的热辐射形式的热量， 测量头的帮助; 将两个可见的定位梁引导到工件表面，两个定位梁在交点处相交; 并且校正工件和测量头之间的相对位置，使得交点和期望的测量点在工件表面上重合。