Abstract: In order to solve the problem of the lack of general detection equipment for on-board auxiliary power
supply of rail vehicles，we design a new automatic integrated test platform for evaluating the performance index of
on-board power supply in rail transit． The software of this platform is the main controller，and this paper
synthetically uses computer control，frequency conversion and voltage regulation，sensor measurement，network
communication and other technologies to simulate the working environment of electric vehicles，integrates the
existing hardware equipment，and builds a unified hardware testing platform． On the basis of this hardware
platform，the software measurement and control system is designed and developed to enhance the engineering
research ability of the laboratory for the life and reliability detection of on-board power supply，and provide test
data for the advanced maintenance of the corresponding products as the basis for the maintenance，which saves
the testing resources and improves the detection efficiency．

Key words: vehicular power supply, test platform, test