Automatic measuring instrument of contact line wear based on machine vision and measuring method

Abstract

The invention relates to an automatic measuring instrument of the contact line wear based on machine vision and a measuring method. The instrument comprises a shell that is provided with a handle on the side and a window in the surface. A light emitting unit is arranged inside the shell. The light emitting unit sends out a light beam, the light beam passes through a reflecting unit and then projected through the window onto a wear face of a contact line to be detected in a covering manner. The reflected light of the wear face of the contact line to be detected returns back to the reflecting unit along the same route, and received and imaged by a telecentric lens through the reflecting unit. An industrial camera shoots and sends the imaging to a processor. The processor calculates the widthof the wear face of the contact line according to the imaging. The corresponding wear amount of the contact line is calculated according to the geometric relationship between the width of the wear face and the wear amount.

Description

technical field [0001] The invention relates to an automatic measuring instrument and a measuring method for contact wire wear based on machine vision. Background technique [0002] The current catenary applications are mainly distributed in the railway and subway fields. The flexible catenary is mainly used in the railway field, while the rigid catenary is used in the subway field. The biggest advantage of the rigid catenary is that it has no axial tension and no breakage. In addition, it has the advantages of relatively simple structure and small maintenance workload. At present, most subways in China are using rigid catenary, but with the increase of running time, the pantograph-catenary relationship between the train pantograph and the catenary line in some sections is not good, which makes the phenomenon of serious local wear of the catenary line increasingly prominent. Severe wear and tear can lead to breakage of the contact wire, further deteriorating the pantograph-...

AI Technical Summary

Problems solved by technology

At present, most subways in China are using rigid catenary, but with the increase of running time, the pantograph-catenary relationship between the train pantograph and the catenary line in some sections is not good, which makes the phenomenon of serious local wear of the catenary line increasingly prominent. Severe wear can lead to breakage of the contact wire, further deteriorating the pantograph-catenary relationship

[0003] In addition to the difference in rigidity and flexibility between the contact wires in the subway and the contact wires in the railway field, there is also a major difference in that the contact wires in the subway need to be clamped by bus bars. At present, when testing the wear of the contact wires in the subway, It is necessary to disassemble the contact wire from the bus bar and use the contact method of vernier caliper for detection. This method is not strong in automation and low in efficiency. Therefore, it is necessary to study a method that can complete the detection without removing the contact wire from the bus bar. method

Images