Design Of Monitoring Device For Air Compressor System Of Rail Vehicle

In the safe operation of the railway, the railcar is essential troubleshooting mechanical vehicles. With the rapid development of China’s railway, catenary fault accounts for the proportion is growing up, and railcars work longer and longer on the railway line, if drivers do not understand the working conditions of rail vehicle compressed air system, it is prone to traffic accidents, resulting in runaway of the rail car, and even lead to the two vehicles collided on the line, or to derail runaway rollover event occurs at the turnout. Currently, the railcar doesn’t install special air system monitoring device, in order to fill the existing catenary railcar monitoring device without technology, in this paper, it designs a railcar air system monitoring devices to ensure that the track car driving safety.To eliminate the affect of the temperature of the working environment on the monitoring device for measuring air pressure results, in this paper, the temperature compensation principle and common methods of silicon pressure resistance type pressure sensor are in-depth study. Due to the current application of artificial neural network is more extensive, in this paper, BP neural network as the basis for proposed GA-PSO-BP hybrid optimization algorithm piezoresistive pressure sensor temperature compensation. At the same time, the GA-PSO-BP optimization algorithm is compared with the BPLM algorithm and the GA-BP algorithm, using Matlab to accomplish the temperature compensation simulation, verification GA-PSO-BP hybrid optimization algorithm to solve the feasibility piezoresistive pressure sensor temperature compensation.Based on the above basis for developing the railcar’air compressor system monitoring and user interface system. Monitoring device with dual CPU architecture DSP28335+microcontroller, including sensor selection, the signal processing circuit module, DSP28335 module, a microcontroller module, among them, DSP28335 module accomplishs data processing function, microcontroller module accomplishs control functions. User interface system using VB.Net and Matlab mixed programming, The client interface is coded by VB.Net and database server is built by Access2010, using ActiveX automation technology to transfer GA-PSO-BP hybrid optimization algorithm to accomplish the temperature compensation.The experiment of measuring system is carried out in laboratory experiments with the simulation circuit. The result shows that each measurement of pressure basically consistent with expectations, the monitoring device meets the design requirements. Currently, the monitoring device has been installed in catenary maintenance work on a railcar of Railway Bureau’ power segment operation, the actual operating result shows that:monitoring device meets stable performance, high precision monitoring, overpressure automatic alarm in the overpressure and underpressure state, it meets the actual operation requirements.