Design of Train Signal Image Acquisition Device based on LabVIEW
At present,the main factory of rail train relied on oscilloscope to collect the signal image of train braking sys-tem,and the collected results were printed and recorded manually.There were some problems such as cumbersome opera-tion,time-consuming,laborious,inconvenient query of results and so on.In order to reduce the work intensity of the de-bugging personnel and improve the efficiency and traceability of the results,it was designed and developed that a signal im-age acquisition device for train braking system based on LabVIEW.In terms of hardware,the pressure signal was converted into an electrical signal through the sensor,and then the real-time voltage or current signal of each channel was converted in-to a digital signal through the acquisition card,and was transmitted to the intelligent host through the driver.The software was designed by LabVIEW and ran on the intelligent host.According to the collected data,the functions of waveform dis-play,parameter calculation,picture storage and upload were carried out.It could communicate with the intelligent debug-ging management platform through the MQTT protocol,and realize the sending and receiving of various information and commands in a task-driven manner.Through laboratory and field tests,the debugging data could be saved accurately in real time,which improved the efficiency of debugging urban rail vehicles in the field workshop and met the expected require-ments of the design.