Precision Analysis of the Unified Spatial Metrology Network Adjustment Model

In industrial metrology, a multi-type instrument is only combined to completing all measurement task, and measurement data type and accuracy of each type instrument is different, so valid adjustment model is need to setting up and solving spatial position and attitude parameter of multi-type instrument. Based on observation equation with condition equations, the article established generalized USMN adjustment model and combined adjust for different type instruments, such as laser tracker, total station and theodolite. Furthermore, because of different data type, efficient weight matric model is build up to get accuracy weight, and this model can get precision position without abundant redundant observation. Based on angular resection and coordinate transformation, spatial network preliminary computation model can solve approximate parameter without theodolite each aiming angle and scalebar measurement. At last, measurement datum is solved with generalized USMN adjustment model, the solution result shows that the model can solve different instrument and raise the point accuracy.