Car Equipment State And Stamping Operation Quality On-line Monitoring Method And Application

Hydraulic tamping machine (abbreviated as tamping machine) is an essential equipment for constructions of new railways, major or medium overhauls and ballast screenings of old railways, and maintenance of railways in use. It is able to automatically lift and line railway and tamp railway ballast, which enables railways to meet railway design standards as well as railway maintenance requirements for the sake of security. Especially with the development of implement of increasing speed, over-loading and high-density, the existing tamping machine can not fully meet the requirements of the maintenance of railways. The08-32tamping machine is the main force vehicle of maintenance, Guangzhou Railway ask for the technical improvement in increasing the on-line monitoring system of device condition and operation quality of08-32tamping machine to improve operating performance and equipment maintenance level.Via the real-time monitoring of device operation, the on-line monitoring system of device condition and operation quality of tamping machine can tell whether the device is running well and can alarm as soon as the failure is detected. Thus, attendant early diagnosis is made and correspondent repair follows. It can glean and process the operation quality information, and efficiency as well as accuracy should be improved through the employment of a accurate new method. The system can greatly ameliorate the performance of existing tamping machine s and escalate the device maintenance level to satisfy the requirement of acceleration of trains. In this paper, on the basis of the design and development of on-line monitoring system of device condition and operation quality of tamping machine, in-depth research is made on such key technologies as method of on-line monitoring of device condition, new method of railway work, multi-functional mixed I/O module and communication server based on remote monitoring system.1. The project implementation plan and technology roadmap are put forward in this paper according to research purposes, contents and requirements, and then points out the key and difficult points, summarizes the present research and developmental trends of the on-line monitoring system of s tamping machine.2. The structure and operating conditions of tamping machine concerned with the on-line monitoring method and the technology issues of tamping machine are analysed. A measuring point of the on-line monitoring system, an on-line monitoring system model and a monitoring database are established. Hence, real-time alarm of device failure, fault diagnosis and remote real-time control are realized.3. The mathematical model of round vertical curve is established in response to the new method of railway work and technology issues. The laser chord is adopted to accurately measure the vertical curve and remove the residual deviation to achieve accurate track-lifting. In the line difficult to operate, minimum mean square error fitting curve is used, and then the shape of target curve is re-designed for providing theoretical parameters for accurate tamping to achieve the digital precise track lifting and lining control.4. A multi-functional mixed I/O module is designed and realized via the analysis of the requirement of the I/O module from the on-line monitoring system of tamping machine, The module has multiple functions such as analog input, analog output, digital input, digital output, counting statistic input, etc.. I/O ports can be configured to one of the five functions by the means of software. Using the module can reduce the cost of device acquisition, improve the system reliability and reduce the installation space5. A non-blocking NIO mode of communication server is designed for server design and development issues of the remote monitoring system of tamping machine. A delay model of remote monitoring system is established; delay analyses of vehicle terminal and the GPRS link of remote server communication are made; measurements concerning how to optimize delay and recover interrupted data of GPRS are put forward; real-time concurrent communication protocols between server and vehicle terminal, server and monitoring client are designed. Results of performance and load pressure tests indicate that the communication server designed and developed by us can meet the need of real time and concurrence of the remote monitoring system of tamping machine.6.The GPRS communication function, communication performance and data acquisition performance are all tested both in the laboratory and the field under the harsh circumstance, and results show that the system works properly and fully meets the system design requirements and performance indicators.The method of monitoring device condition and operation quality of tamping wagon proposed in this paper effectively resolves technological problems such as low efficiency, poor operation quality, hard maintenance etc.. The informationization level and technical level of existing tamping wagon are escalated, which provides important theoretical basis and paves the way for the design and development of on-line monitoring system for large-scale construction machinery. The system of on-line monitoring on operation quality and equipment status of tamping has passed the technological achievement identification. The results indicate that the technique is advanced, and the design is reasonable and runs reliably. Both systemic technology and applied theory have reached the leading domestic level.