Rail nut loosening detection and maintenance device and method based on CCD camera

Abstract

The invention provides a rail nut loosening detection and maintenance device and method based on a CCD camera. The rail nut loosening detection and maintenance device comprises a rack, a moving wheelrolling on the rail and a moving motor driving the moving wheel to rotate are arranged at the bottom of the rack, the detection and maintenance device is arranged on the rack, and comprises adjustingmechanisms, nut screwing mechanisms and the CCD camera, the two adjusting mechanisms are correspondingly opposite to two tracks of the rail, the adjusting mechanisms comprise lead screws which are vertically arranged, lifting motors driving the lead screws to rotate and adjusting platforms sliding up and down on the lead screws, the two nut screwing mechanisms are arranged on the adjusting platforms, and are symmetrical relative to the lead screws, the nut screwing mechanisms comprise universal sleeves and rotating motors driving the universal sleeves to rotate, the CCD camera collects bolt images, and sends the collected images to an image treatment module to process the images, a main controller analyzes and compares the information of the bolt images, controls the rotation of each motor, automatically detects loose nuts of the rail and maintains the loose nuts.

Description

technical field [0001] The invention relates to the technical field of rail defect detection, in particular to a CCD camera-based rail nut loose detection and maintenance device and detection and maintenance method. Background technique [0002] The railway transportation industry plays a unique role in my country's national economy. In terms of transportation of key materials, the main transportation volume is undertaken by railway transportation; in terms of passenger transportation, railway has also become the most popular means of transportation because of its large passenger capacity, convenience, and cheap price. Railway safety has also received more and more attention from the government and the public. [0003] The problem of loose nuts on rails has always been a common defect of rails. In the existing maintenance methods, maintenance workers usually patrol the road to check whether the nuts are loose. The amount of preload applied is mainly determined by personal ...

AI Technical Summary

Problems solved by technology

The detection speed is slow and the accuracy is not high through manual detection of bolts. When the pre-tightening force used to screw the nut is too large, the bolt will be plastically deformed and loosened under the condition of accidental overload, or even broken.

When the pre-tightening force used for screwing the nut is not enough, it will cause natural loosening after a period of use

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