Information extension of three-dimensional model for coordinate measurement

The process of coordinate measurement involves a large amount of data. This paper uses the IDEF0 and DFD model to analyze the measuring function requirements for solving the problem of ambiguous internal information flow and material flow during the measuring process and uses IDEF1X method to constitute information model of coordinate measurement. The information is extended on the three-dimensional model generated by using the MBD (model based definition) technology. It enables us to specify the measurement process and reduce the specification uncertainty of the digital measuring system. In addition, the extended information could have been inputted for the subsequent process such as process planning, data analysis and evaluation of measurement results.