Crack detection method and system

• Main Authors: LYU PIN, YANG JIONGMING
• Format: Patent
• Language: Chinese; English
• Published: 16.11.2018
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention provides a crack detection method and system. The crack detection method comprises the following steps of acquiring multiple images in a prospective region on a component to be detected,wherein multiple speckle points are arranged in the prospective region; tracing position changes of multiple speckle points based on the multiple acquired images to acquire a stress field of the prospective region; and according to a comparison result of a stress maximal value in the stress field and a set stress threshold value, determining whether the component to be detected has a crack or not. By adopting the crack detection method and system of the embodiment of the invention, online detection can be performed on the crack, and the economic loss caused by the crack checking after shutdown is avoided. 提供种裂纹检测方法和系统，该裂纹检测方法包括：获取待检测部件上的预定区域的多个图像，其中，在预定区域内布置有多个散斑点；基于获取的多个图像追踪多个散斑点的位置变化，以获得预定区域的应力场；根据应力场中的应力极大值与设定应力阈值的比较结果，确定待检测部件是否出现裂纹。采用本发明示例性实施例的裂纹检测方法和系统，能够对裂纹进行在线检测，避免了停机检查裂纹所造成的经济损失。