Monocular vision-based hoisting steel wire rope spatial vibration measurement method

Abstract

The invention discloses a monocular vision-based hoisting steel wire rope spatial vibration measurement method, which mainly comprises the following steps: respectively installing a camera and a background screen in front of and behind a vertical steel wire rope to acquire a steel wire rope vibration image sequence; performing noise reduction processing on the acquired image; determining the positions of two edge lines of the steel wire rope in each frame of image by utilizing an edge detection and positioning algorithm; adding a virtual reference line perpendicular to the steel wire rope at the measuring point; calculating coordinates of an intersection point between the reference line and the two edge lines, then calculating a proportionality coefficient between the actual width and thepixel width of the steel wire rope, and then calculating the vibration displacement of the steel wire rope in the first direction; determining a function relationship between the vertical distance between the camera and the steel wire rope and the pixel width of the steel wire rope by utilizing a fitting method, and further calculating to obtain the vibration displacement of the steel wire rope inthe direction vertical to the first direction. According to the invention, the monocular vision device is used for measuring the vibration displacement of the steel wire rope in two directions, so that the measurement cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of dynamic analysis and measurement of hoisting wire ropes, in particular to a method for measuring spatial vibration of hoisting wire ropes based on monocular vision. Background technique [0002] The operation of the mine hoisting system is completed by the axial movement of the hoisting wire rope in the vertical direction, so the dynamic characteristics of the hoisting wire rope are an important indicator to measure the operating state of the hoisting system. Since the wire rope is running at high speed, its parameters such as stiffness and quality are constantly changing, so it is prone to vibration; in addition, the failure of the guide device and the axial movement of the sky wheel will cause the hoisting wire rope to vibrate in space. When the hoisting wire ropes generate relatively large vibrations in the same plane, it may cause ropes to collide with each other and contact interference with surround...

AI Technical Summary

Problems solved by technology

But it did not consider how to control the simultaneous shooting of two cameras and the interaction between vibrations in two directions

In addition, the image processing and displacement calculation process of this method is relatively complicated; obviously, the cost of two cameras is higher

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