۱٫ Introduction

۲٫ Introduction to Measurement Principle

۳٫ System implementation

۴٫ Data processing

۵٫ Conclusion

Acknowledgement

References

As the tension of contact wire in high-speed electrified railway increases greatly, coupled with the fast relative speed of pantograph and catenary, the wear of contact wire is more serious. Timely and accurate measurement of contact wire wear becomes increasingly important. In this paper a dynamic measurement method for contact wire wear in electrified railway is introduced. With the aid of laser supplementary light, the bottom of contact wire is captured by line-scanning camera. The measurement is performed based on the principle of binocular ranging by analyzing the local wear conditions captured with different cameras to calculate the complete wear data of contact wire. The method has been tested on line, and the test data shows that the goal of quickly measuring the contact wire wear is achieved.

Introduction

By the end of 2018, China’s high-speed railway has exceeded 25,000 kilometers. With the development of highspeed electrified railway, the maintenance burden of power supply system has accordingly increased1 . During the construction of high-speed railway, in order to ensure the smoothness of OCS lines, the tension increases greatly and the elasticity decreases in the pantograph-catenary operation. If without timely detection, it will result in wire breakage at serious wear positions on account of high tension force. At present, in China the wear is mainly measured by manual with vernier caliper and the workload of line inspection is so heavy3 . Since the wear points are usually in discrete distribution and easy for missed measurement, if the wear of contact wire can be quickly and efficiently measured using on-board measurement equipment, it will be of great significance to prevent the pantograph and catenary accident and save the maintenance time of operation site.