Method for measuring tailings pond dry beach length by utilizing machine vision

Abstract

The invention relates to a method for measuring tailings pond dry beach length by utilizing machine vision. The method comprises the steps of setting three marker posts on a tailings dry beach, wherein the three marker posts are in one straight line, which is perpendicular to a dam body; respectively measuring the distance between each two adjacent marker posts, and the distance from each marker post to the dam body; utilizing a color high-definition digital video camera for shooting a digital image, and extracting positions of the three marker posts in the digital image; dividing the digital image into a dry beach area and a water area; fitting position coordinates of the three marker posts in the digital image into a straight line, and calculating position points of the marker posts on the fitted straight line and cross ratio of boundary intersection points; utilizing the property of constant cross ratio for calculating the distance of the dry beach. By utilizing the machine vision for automatically measuring the dry beach length, no other factors such as dry beach slope and dam water level height needed to be referred, so that the method has the characteristics of convenience in implementation, low measuring system cost and small measurement error, and has a higher application value.

Description

technical field [0001] The invention relates to the technical field of tailings pond safety monitoring, in particular to a method for measuring the length of a tailings pond dry beach by using machine vision. Background technique [0002] The dry beach length of the tailings pond is an important indicator to measure whether the tailings pond can survive the flood season safely, and it is also one of the important factors to evaluate whether the tailings pond is safe. At present, there are several methods commonly used at home and abroad to measure the length of the tailings pond dry beach: [0003] 1) Before the flood season, reduce the water level of the reservoir as much as possible so that the dry beach has a sufficient length. From the highest level of sub-dams, a red flag will be placed on the dry beach every 50 meters (depending on the specific conditions of the dry beach), extending to At the junction of the beach and the water, the length of the dry beach is visuall...

AI Technical Summary

Problems solved by technology

Disadvantages: This method needs to be assisted by other parameters such as the combined water level, and more signposts are placed on the mountains around the tailings pond

Disadvantages: After the sensor is laid and buried by new tailings sand, the sensing equipment needs to be reinstalled

[0011] However, the above methods all have the disadvantages of many calculation steps and cumbersome calculation process, and the calculation accuracy will be reduced due to many calculation steps.

At the same time, it also requires the cooperation of a variety of high-precision instruments, which is costly to implement and poorly feasible

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