Device for automatically detecting nut loss of rail fastener system

Abstract

The invention relates to a device for automatically detecting nut loss of a rail fastener system, comprising a vision collecting device, a GPS locator, an illumination device and a computer system, wherein nut illumination is added for the illumination device, and the computer system is provided with a video data storage software module, a display software module and a lost nut identifying and positioning software module. The executing steps are as follows: the video data storage software module receives and stores the position information of the device obtained by the GPS locator and continuous video images containing the fastener system nut obtained by the vision collecting device, and records the corresponding time value obtained by the video image and the position data; the lost nut identifying and positioning software module carries out pretreatment, sub-image cutting, feature extraction, feature classification and position calculation to the obtained video image to identify the position the nut loss; and the display software module displays and prints the image and position information of the lost nut. In the invention, the device moves along with the train during operation so as to automatically detect and position the nut loss of the rail fastener system.

Description

technical field [0001] The patent of the present invention relates to an automatic detection device for missing nuts in a rail fastener system, in particular to an automatic detection device for missing nuts in a rail fastener system based on computer vision. Background technique [0002] Line maintenance plays an important role in the normal work and safe operation of subway and railway systems. The railway and urban rail transit departments of all countries in the world attach great importance to line maintenance work, and have formulated detailed plans and strict regulations. One of the important tasks of line maintenance is to check whether the nuts of the fastener system are missing and whether the fastening parts are loose. Fastener system The function of nuts, spikes and fasteners is to achieve a tight and effective connection between rails and sleepers, and they are important accessories for railway and subway lines. In practice, due to insufficient installation an...

AI Technical Summary

Problems solved by technology

[0006] (1) The method of using neural network to classify features is easy to cause the classification and identification results to fall into local optimum, and generally requires large samples, and the training results are also unstable, so that the applicability and working reliability of the visual recognition system need to be improved;

[0007] (2) The position of the missing nut is calculated based on the number of nuts in the fastener system in the video image and the distance between two adjacent nuts. This calculation method results in a large error in the location of the nuts

Images