A Vision Based Audit Method and Tool that Compares a Systems Installation on a Production Aircraft to the Original Digital Mock-Up

摘要

The work describes a concept application to aid a safety engineer to perform an audit of a production aircraft against safety driven installation requirements. The capability is achieved using the following steps: A). Image capture of a product and measurement of distances between datum points within the product with/ without references to a planar surface B). A digital reconstruction of the fabricated product by using multiple captured images to reposition parts according to the actual model. C). The projection onto the 3D digital reconstruction of the safety related installation constraints, respecting the original intent of the constraints that are defined in the digital mockup. D). Identification of the differences between the 3D reconstruction of the actual product and the design time digital mock up of the product E). Identification of the differenceson conformances that have a relevance to safety driven installation requirements with reference to the original safety requirement intent. Step 'A' gives the safety engineer a means to perform measurements on a set of captured images of the equipment they are interested in. Steps 'B', 'C', 'D' and 'E' together give the safety engineer the ability to overlay a digital reconstruction that should be as true to the fabricated product as possible so that they can see how the product conforms/ or doesn't conform to the safety driven installation requirements. The work has produced a concept demonstrator that will be further developed in future work to address accuracy, workflow and process efficiency.