Real-time monitoring method for idle running and sliding of train wheel

Abstract

The invention discloses a real-time monitoring method for idle running and sliding of train wheels. The method comprises the following steps: 10) installing devices: fixedly installing a camera and a flat mirror on the bottom rack of a train, and arranging calibration blocks on a wheel and a sleeper of the train respectively; 20), adjusting the focal length of the camera, fixing the photographing scope, and enabling a virtual image of the flat mirror formed on the calibration block on the wheel and the calibration block on the sleeper to be within the photographing scope of the camera; 30) converting images in a video into grey-scale images, and decomposing the grey-scale images; 40) calculating the running speed of the train; 50) calculating the rotating speed of the wheel of the train; and 60) determining the running state of the wheel. The monitoring method achieves a monitoring function by means of only one camera, the problem that two cameras need to be strictly synchronized for detection and calibration is effectively solved, and the monitoring efficiency is improved.

Description

Technical field [0001] The invention relates to the field of real-time monitoring of train wheels, in particular, to a real-time monitoring method for idling and sliding of train wheels. Background technique [0002] In train operation, if there is not enough cohesive traction, the result is bound to be insufficient speed. If the adhesion between the wheel and the rail fails, the train wheels will spin idly, causing wheel-rail scratches, and severe scratches are often one of the important sources of rail fatigue failure. The railway public works department spends a lot of money every year just to repair and replace the scratched rails. At the same time, when the train is braking, if the adhesion between the wheel and rail interface fails, it will cause the wheels to slip and cause wheel scratches. Wheel scratches not only cause strong vibration of the vehicle / track when the train is running, and strong impact noise between the wheels and rails, but also cause damage to wheel be...

AI Technical Summary

Problems solved by technology

[0003] The traditional detection method is mainly to analyze the idling or sliding state of the train wheels through speed measurement and positioning. The main speed measurement methods include: speed measurement motor, photoelectric speed sensor, Doppler radar, laser speed measurement, inertial acceleration sensor, GPS speed measurement, etc. These methods have the problem of insufficient detection accuracy. At the same time, in actual detection, they are often combined applications of multiple speed measurement methods. There are differences in the detection data format and data fusion problems, and the requirements for background data processing equipment are extremely high.

[0004] With the development of digital image technology and the maturity of video image analysis and processing, video speed measurement has been widely used. For the idling and sliding monitoring of train wheels, dual-camera monitoring is mainly used, but there are two cameras that need to be triggered synchronously. Trouble with camera replacement and maintenance

Images