接触网几何参数测量仪检定台架的可靠性评估

Evaluating the Reliability of the Calibrating Device for Catenary Geometrical Parameter Measuring Instrument

介绍针对DJJ-8激光接触网检测仪的接触网几何参数测量仪检定台架的结构以及测量模拟接触线高度、拉出值、支柱侧面限界、轨距和水平(超高)等关键参数的测量方法。并依据JJF 1059—1999《测量不确定度评定与表示》开展检定台架接触线高度、拉出值、支柱侧面限界、轨距和水平等关键测量项目的测量不确定度评定,结果表明,该检定台架满足I级精度的接触网几何参数测量仪的检定要求。

The authors introduce the structure of the calibrating device for geometrical parameter measuring instru- ment compatable with DJJ-8 laser inspection device for catenary, as well as the methods of measuring catenary height, stagger value, mast gauge, rail gauge and super-elevation. Then the uncertainty degree of eatenary height, stagger value, mast gauge, rail gauge and super-elevation gained through the calibrating device are estimated ac- cording to＂Evaluation and Expression of Uncertainty in Measurement＂ （JJF1059---1999）. The results show that the calibrating device could satisfy the calibration requirements of the first class accuracy degree of the geometrical pa- rameter measuring instruments for catenary.