In order to find out the fault of signal lighting unit in advance and ensure the safety of train operation,XDZ-B signal lighting unit test bench is developed.The hardware and software design of lighting unit are introduced in detail.In the lighting unit test bench,the main and auxiliary filament voltages are collected using a linear optocou-pler amplifier,the main and auxiliary filament currents are collected using a through current transformer,filament switching is achieved using a field-effect transistor,relay contact resistance is tested using a bridge circuit,and on-site testing is conducted.The test results show that the test bench can evaluate the basic functions and performance in-dexes of XDZ-B signal lighting units,and find out the lighting units with degraded performance in advance;the maxi-mum voltage error,current error,and contact resistance error of the XDZ-B signal lighting unit tested on the lighting unit test bench are 0.17%,0.16%,and 0.15%,respectively,which can meet the requirements of on-site measurement accuracy for lighting unit parameters.
万方数据
维普
