Abstract:Aiming at the problems in photogrammetric systems for aircraft static strength tests, such as the lack of applicable on-site calibration methods and devices, and the impact of complex on-site environments on measurement accuracy and efficiency, this paper proposes a multi-dimensional metrological calibration technique. A laboratory calibration device with a carbon fiber hexahedral frame was constructed to realize high-precision spatial coordinate transmission, with a measurement uncertainty U equals 1.6 + (L / 300) μm, k = 2. The influence of temperature and humidity (10 ~ 30 ℃, 10% ~ 90% RH) on measurement accuracy (maximum relative error 0.006 4%) was identified, and blue light illumination was adopted to eliminate light interference. A portable on-site calibrator was designed to break through traditional calibration limitations. Test results show that within the measurement range of 4.5 ~ 6.5 m, the system error does not exceed ± 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.