Quantity traceability in large-scale measurement in situ

The quantity traceability system is often established to evaluate the accuracy of large-scale measurement. It is difficult to trace back to the source based on large-scale pairing vision measurement net. So quaternion spatial registration algorithm is used to transform the measure values of all vision sensors to laser tracker coordinate system with high precision standard, and finally these values are traced in situ. Besides, the laser tracker is also traced by spatial ability estimation experiments. The corresponding experimental results show that the uncertainty of laser tracker is 10m + 0.8m/m, while the uncertainty of pairing vision measurement net exceeds 0.2 mm. The method can trace back to the field source for most large-scale devices quickly, and the corresponding pairing vision measurement net can satisfy plenty of large-scale measurement tasks.