Invention Grant
- Patent Title: Method for measuring phase boundaries of a material during machining with a machining beam using additional illumination radiation and an automated image processing algorithm, and associated device
- Patent Title (中): 用于使用附加的照射辐射和自动图像处理算法以及相关联的装置在用加工梁加工期间测量材料的相边界的方法
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Application No.: US11885812Application Date: 2006-03-07
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Publication No.: US08207471B2Publication Date: 2012-06-26
- Inventor: Boris Regaard , Anas Moalem , Jan Michel , Peter Abels , Stefan Kaierle , Wolfgang Schulz
- Applicant: Boris Regaard , Anas Moalem , Jan Michel , Peter Abels , Stefan Kaierle , Wolfgang Schulz
- Applicant Address: DE Munich
- Assignee: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
- Current Assignee: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
- Current Assignee Address: DE Munich
- Agency: Renner Kenner Greive Bobak Taylor & Weber
- Priority: DE102005010381 20050307
- International Application: PCT/DE2006/000400 WO 20060307
- International Announcement: WO2006/094488 WO 20060914
- Main IPC: B23K26/03
- IPC: B23K26/03

Abstract:
The present invention relates to a method for measuring phase boundaries of a material during the machining of a workpiece (12) with a machining beam, more preferably with a laser beam, and a device that is embodied in such a way as to carry out the method. According to said method, during the machining, a machining region (13) containing the impact point of the machining beam (1) on the workpiece (12) is illuminated at least approximately coaxially to the machining beam (1) by means of additional optical radiation (2). Radiation (3) reflected by the machining region (13) is detected, parallel to an incidence direction of the optical radiation (2) or at small angle thereto, by means of an optical detector with local resolution, in order to obtain an optical reflection pattern of the machining region (13). From the optical reflection pattern, a course of at least one liquid/solid phase boundary in the machining region (13) is then determined in an automated manner by means of an image processing algorithm on the basis of a transition from an area containing a large-surface homogeneous area and an area containing a plurality of small-surface homogeneous areas in the optical reflection pattern.
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