The T-shaped inspecting instrument for railway track is a T-shaped trolley structure.When measuring the gauge on curves,due to deffects in the measurement principle,inherent errors(D-value error)will be introduced into the measured gauge,leading to the problem of"false gauge".On the basis of analyzing the principle of gauge mea-surement and D-value error,as well as the impact of D-value error on the accuracy of gauge measurement,the paper discusses common methods for dealing with"false gauge"problems,such as short longitudinal beams,linear param-eter compensation,and adding an assisted gauge probe,proposes an inertial trajectory compensation method and veri-fies the effect of gauge compensation on experimental lines.The results show that after using the inertia trajectory compensation,the gauge measured by the T-shaped inspecting instrument for railway track is closer to the actual gauge and meets the requirements of TB/T 3147-2020 Inspecting instruments for railway track.The repeatability and consistency are better than those of the assisted gauge probe compensation method.Based on the analysis of the effec-tiveness of two compensation methods,relevant suggestions for optimizing the standards of inspecting equipment for railway track are proposed.
Inspecting Instruments for Railway TrackD-value ErrorGauge CompensationInertial Trajectory Com-pensation
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