一种裂纹自动测量与监控的虚拟仪器设计

Design of a Virtual Instrument for Automatic Crack Measurement and Monitoring

疲劳裂纹的萌生和扩展是一个渐进的过程,对疲劳裂纹提前预测以及对已经产生疲劳裂纹的扩展进行实时监测,具有极高的实用价值。设计了一款基于G语言的虚拟仪器。该仪器可以实现对疲劳裂纹的产生、扩展进行实时监测;当裂纹长度超过预警值时报警,并将采集的实时裂纹长度保存至指定文档或实时显示,以便为后续的科学研究提供数据支持。试验结果表明,该仪器可用于实际工程中裂纹的监测、预警和记录。

The fatigue crack initiation and propagation is a gradual process, so the prediction of fatigue crack in advance and real - time monitoring of generated extension of fatigue crack have been of highly practical val-ue. A kind of virtusd instrument based on G lfinguage is designed. This instrument can resize the real - time monitoring of the generation and extension of fetigue crack,when the crack length exceeds the warning value, the alarm will go off and real - time crack length is saved to the specified document or display, which will provide the data support for the further scientific research. The test results show that the instrument can be used for crack monitoring,warning and recording in actual engineering project..