Abstract:Aiming at the on-site calibration problem of the photogrammetry system in aircraft static strength tests, this paper proposes a multi-dimensional metrological calibration technology, constructs a laboratory calibration device with a carbon fiber hexahedral frame, and realizes high-precision spatial coordinate transmission (U=(1.6+ L/300)μm, k=2); identifies the influence of temperature and humidity (10℃-30℃, 10%-90% RH) on measurement accuracy (maximum relative error 0.0064%), and adopts blue light illumination to eliminate light interference; designs a portable on-site calibrator to break through traditional calibration limitations. Test results show that within the measurement range of 4.5m-6.5 m, the system error is ≤±0.3%, which meets the requirements of static strength tests and provides technical guarantee for the standardized application of the photogrammetry system in static strength tests.