On-line high-speed detection system of train wheel set tread and wheel rim and detection method thereof

Abstract

The invention discloses an on-line high-speed detection system of train wheel set treads and wheel rims and a detection method thereof. The detection system comprises a target detection unit, a speed measurement unit, a location determination unit and an image acquisition unit which are arranged at the outside of tracks in order, and an image processing unit and a control unit, wherein the image acquisition unit comprises multi-group line structure-light sources and a high-speed planar array camera, an intersecting line formed by intersecting the light plane with the wheel set is arranged between a train sand blasting pipe / braking unit and the track, and the imaging filed of the planar array camera covers and is slightly larger than the intersecting area. The detection method comprises: 1, judging whether the wheel set is defective by canny edge detection; 2, calculating the depth of the defects to obtain the size of the defects; and 3, splicing the light band portion of each image in order into an image. According to the invention, the influence of the train sand blasting pipe and braking unit on the detection is avoided, and the detection speed is fast; the system is suitable for 20-300km / h train on-line detection, the precision is high, the detection of the defects which are less than 1mm can be realized; the detection result is displayed in an image, thus the observation is convenient.

Description

technical field [0001] The invention relates to a detection system and a detection method thereof, in particular to an on-line high-speed detection system and a detection method of a train wheel set tread and wheel rim. Background technique [0002] The wheel set is one of the most important parts of the train, and the quality of the wheel set directly affects the driving safety of the train. Defects on the tread surface of train wheels include tread scratches and tread peeling. These defects will bring additional impact and vibration during train operation, which will seriously affect the safety of trains and the service life of track facilities. So how to accurately detect train wheel sets? The defect of the tread surface is a detection technical problem that needs to be solved urgently in the train development. [0003] In recent years, with the rapid development of my country's economy, the speed of trains has gradually increased. With the actual situation of high speed...

AI Technical Summary

Problems solved by technology

Defects on the tread of train wheels include tread scratches and tread peeling. These defects will bring additional impact and vibration during train operation, which will seriously affect the safety of trains and the service life of track facilities. So how to accurately detect train wheels? The defect of the tread surface is an urgent detection technology problem to be solved in the development of the train

[0003] In recent years, with the rapid development of my country's economy, the speed of trains has gradually increased. With the actual situation of high speed and heavy load, the train wheel sets have to bear greater dynamic loads, making the train wheels very prone to tread scratches, Phenomena such as peeling, which in turn lead to a decrease in the quality of train operation

The tread wear of the train wheel sets is intensified, and in severe cases, it will cause the axle to break, the wheel to collapse, and even cause major accidents

[0004] At present, there are many detection methods for tread defects. Among them, in the patent No. ZL200610155281.3, the influence of the sandblasting tube and the brake device is not considered in the process of detecting the tread of the wheel set. The light plane of the structured light group is different from the track plane. The included angle and line array camera are used for imaging. Since the structured light group cannot completely cover the tread, it can only detect part of the defect information of the entire wheel set tread. In addition, the defect information is obtained by comparing with the non-defective picture and then doing the difference. , without considering the vibration and offset of the locomotive, it is easy to cause a large detection error

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