Research on the measurement device for inner distance of standard wheelsets in rail transit

This article studies a high-precision intelligent detection device for the inner distance of standard wheelsets in rail transit. Different measuring anvils are used to effectively avoid the impact of threaded splicing on the straightness and repeatability of the measuring rods. High precision grating sensors are used, with a resolution of 0.0001mm and an error of ± 0.018mm. Storage and data calling functions are installed, which effectively improve the accuracy, stability, and real-time recording of wheelset detection; The structure and measurement principle of the standard wheelset inner distance ruler were introduced, and the uncertainty was evaluated. The results showed that the detection device is accurate and feasible for measuring the inner distance of the standard wheelset.