A Novel Digital Metrological Traceability Method for the Monocular Vision-Based Linear and Angular Measurement in Vibration Calibration

In recent years, the monocular vision (MV) method has been gradually applied to precision vibration calibration. To ensure its measurement performance, a highly efficient and accurate traceability strategy for MV measurement has become especially important. In this study, a novel digital metrological traceability method for the MV-based linear and angular vibration measurement is proposed. To facilitate unification and promotion, a standard digital vibration video database, along with a universal uncertainty evaluation model, has been established. This method achieves standard linear and angular vibration measurements by combining the subpixel feature edge and corner extraction techniques as well as an accurate rounding error correction model, whose frequency range can be extended to 0.01–10 Hz. The numerical experimental results show that the maximum relative deviations of the MV-based linear and angular vibration measurements from the standard values are less than 0.070% and 0.069%, respectively, while the expanded measurement uncertainty is less than 0.093%. This method promotes the improvement and unification of the MV-based linear and angular vibration metrological traceability system and achieves a flat traceability chain. In addition, it only requires a high refresh rate display and a series of standard digital vibration videos to achieve highly efficient traceability, which enables MV-based in situ calibration and traceability of vibration sensors and advances the digital transformation of vibration metrology.