Design And Implementation Of Btm Automatic Test Platform Based On LabVIEW

Balise transmit system is the key component of high-speed railway traffic control system,which is designed to realize communication between ground unit and the train in a high data speed.High-speed railway technology is widely used around the world.Since signal transmit devices which designed and produced in China have more important roles in the market,it becomes a critical issue to make sure that our devices can work under different environments.Test or quality assurance is necessary and essential step within the product design cycle.Refer to the Eurobalise test specifications,we expect to design and implement an automatic test platform for BTM based on modular instruments and LabVIEW program language provided by National Instruments Company.On-board equipments use wireless signal to transmit data as well as power the balise units.In this paper,we used black-box testing strategy to test the combination of balise transmission module and on-board antenna,and then analyzed device's performance regarding to designing objective.It's mainly descripted in two parts:tele-power signal and balise up-link signal.In the first,we found out their technical details as well as interface standard requirements.And then specified test targets referring to the signal's constrains and characters.Besides that,we study on the change pattern of the up-link signal when equipment works at high-speed state.At last,we came up with solution to analyze dynamic signal in the static laboratory environment.This article describes test requirements and test cases from two aspects of up-link signal as well as tele-power signal.We used modular instruments as the core hardware equipment and implement the hardware environment.The vector signal arbitrary generator produces balise FSK simulated signal while a vector signal analyzer is used to measure the attributes in frequency and power spectrum.At last,serial modular receives data return by the DUT.As for the software,we used Lab VIEW to accomplish as well as control test flow,generates test report.Above all,we need to test and verify the performance of BTM test platform.