公开(公告)号：US4012620A

公开(公告)日：1977-03-15

申请号：US542091

申请日：1975-01-20

Applicant: Peter Daniel Sciaky

Inventor： Peter Daniel Sciaky

IPC: B23K15/02 ,  B23K9/00

CPC classification number: B23K15/02

Abstract: This invention relates to a method and apparatus for determining the relative position between the point of impingement of an electron beam on a work surface and the seam between parts to be welded. The seam is scanned by oscillating a low power electron beam along a path transverse to the scan. The variation in secondary electrons generated as the beam traverses the seam is detected and amplified. The amplified signal is then acted upon by an electronic converter which converts the wave form by instantaneously taking the Nth root at each point of the curve representing the wave form of the amplified secondary electron current wave form so as to improve the resolution of the signal and make possible an improved definition at the point of impingement of the beam with respect to the seam.

Abstract translation: 本发明涉及一种用于确定工作表面上的电子束的冲击点与要焊接的部件之间的接缝之间的相对位置的方法和装置。 通过沿着横扫扫描的路径振荡低功率电子束来扫描接缝。 检测并放大随着光束穿过接缝而产生的二次电子的变化。 然后放大的信号被电子转换器驱动，该电子转换器通过瞬时取代表示放大的二次电子电流波形的波形的曲线的每个点处的第N个根而转换波形，以提高信号的分辨率， 使梁的相对于接缝的冲击点的改进的定义成为可能。