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[ China Instrument Network Instrument R&D ] The national key R&D plan "Advanced Rail Transit" key project "Railway System Security Technology" has made significant progress in the research of high-speed train travel security technology. The project participated in the successful development of Southwest Jiaotong University. The intelligent safety guarantee system for the high-speed train running department.
The on-board safety monitoring system of the existing high-speed train only monitors the temperature status of the key rotating parts such as bearings and the unstable state of the bogie. The monitoring points are relatively limited, the coverage and system are not strong enough, and it is difficult to realize the early failure of the rotating parts. Early warning. With the improvement of the service requirements for high-speed trains, the existing monitoring and early warning technology of the running department needs to be upgraded. The newly developed “High-speed train moving department intelligent safety guarantee system†will increase the monitoring components, improve the early warning rate, and effectively reduce the equipment failure. The accident rate.
The system uses temperature-vibration composite sensing technology to monitor the running state of key rotating parts such as axle box bearings, gear box bearings, motor bearings and gears. By studying the fault characteristics and identification methods of rotating parts in complex operating environments, the high-speed complex environment is realized. Early warning of early failure of rotating parts; research on abnormal vibration and temperature change of axle box caused by shape damage, establish a slight fault online identification model, and indirectly realize damage identification of other components such as wheel alignment through temperature vibration information of axle box; And the inspection information of the warehouse, the evaluation and prediction technology that breaks through the dynamic performance of the running department, so that the comprehensive evaluation of the overall safety of the running department is completed with each warehousing and maintenance, and the integration of maintenance and evaluation is realized.
In the development process, the project has overcome a series of key technologies, such as time-space-to-cycle fault depth analysis technology, reliability analysis technology for small sample data, and residual life prediction technology for key components, providing reliable service for safe service and precise maintenance of trains. Security and scientific basis.
(Original title: Intelligent monitoring system development provides guarantee for the safe operation of high-speed trains)