Rail Crawling Detection Scheme in Turnout Area Based on Stereoscopic Vision Technology
The rail crawling disease in the turnout area will have adverse effects on railway operation safety,and the current manual inspection methods have problems such as low inspection efficiency and low accuracy.The stereoscopic vision detection system was installed on a mobile platform,and a rail crawling automatic detection robot,algorithm model,and detection target were developed.By locating the rail target and using the stereoscopic vision system to capture the coordinates of the roadside target,high-precision detection of the vision system in motion was achieved.A rail crawling detection scheme for the turnout area was designed based on the structural characteristics of the turnout.The crawling detection test of the switch rail in the turnout area shows that under the condition of 5 km/h,the maximum error of the repeatability test is 0.19 mm,and the maximum error of the accuracy test is 0.54 mm,which meets the millimeter level detection accuracy requirements and can complete the detection of the entire set of turnouts within 2 min.The rail crawling detection robot has the characteristics of fast running speed and high detection accuracy,which can achieve large-scale inspection of railway rail crawling and has good application prospects.
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