The Design and Implementation of a New Type of Track Test Plate

Abstract

Due to the low efficiency and precision of the traditional way of orbit test plate measuring, a new type of track test plate based on digital signal processing technology was designed. For the 48 track circuits, a modular designment method was proposed to simplify assembly and maintenance; The rail voltage and the local voltage input circuits were designed, so that the signal can be directly obtained by MCU; According to the characteristics of 25 Hz circuit, Fourier series method was selected, which can extract separate extraction under the condition of higher harmonic fundamental component. And the uniformity calibration was used to improve the precision and reduce error. The track plate was tested by the simulation of railway signal, the rail voltage and the local voltage error is less than or equal to ±1%, and the phase angle measurement error is less than or equal to ± 0.5°. Measurement speed goes up to once per second when 48 roads are measured in the same time. The experimental results show that the system measuring accuracy is higher, faster, and has a great practical value.