Research On Railway Relay Automatic Test Equipment

Relays are basic components of railway signaling system safety devices which arededicated multiplex switch to open or close signal control circuit. Relays are important part ofthe automatic control and remote control of railway signals with part of he logic circuitconstituted by it to the actuators supervision and operational control of the train. In order toensure the normal operation of railway transport signal control and reliability and security ofthe railway signal relays operating in the system, according to GB/T6902-2001Chinesenational standard test methods for railway signal relay, there are some strict requests of signalrelays, such as contact system consistency; accuracy and reliability; enough functionality onclosing and opening the circuit time characteristics and properties of electrical parametersmust be stable and so on. So, it is very important for relay testing parameters, and the staffmust carry out on a regular basis for these relays measurement, inspection, maintenance andmanagement.In order to better ensure the safety of the railway and reduce manual operations on laterrelay, industrial production may be more information and intelligence in signal relay regularinspection, using modern PC control in technology measurement and management of relaychecking, instead of relying on labor personnel manual operation mode. Thesis is acombination of the existing market relay intelligent tester, studying the automatic testequipment for railway relay, including rail relay electrical parameters, test methods, therequired power supply and so on.According to the research, firstly introduce the research of railway signal relay automatictest equipment at home and abroad as well as the classification、 theory and testingrequirements for railway signal relay; secondly research railway signal relay automatic testequipment hardware and software system, hardware system mainly includes railway relaycontacts on-resistance, the coil current test component design and production; the testcomponents required for power supply design and production; the power supply design andproduction includes AC-DC converters, AC converting DC power isolation transformprecision AC stepper power, constant current sources and so on, software systems includesresearch SCM control system, which use VB language editing menu interface for completing computer automation of the test components; finally analysis the design of the experiment、debug circuit and simulation results.On researching the automatic test equipment for railway relay found that intelligentrailway signal relay automatic test equipment can not only provide a better workingenvironment for the operator, but also effectively reduces human error and improve themeasurement accuracy, and achieve a modern computer management.