A method and system for detecting power sag based on different-zone aerial images

Abstract

The invention relates to a different-strip-aerial-image-based power sag detection method and system. The system is composed of a calibration selection module, a main control module, a space three-dimensional image pair module, a three-dimensional space model measurement module, and a diagnosis module. The calibration selection module calibrates a flight path and selects a field control point; the main control module controls an unmanned aerial plane to fly according to the flight path and controls the unmanned aerial plane to collect space position information of a photo; the space three-dimensional image pair module establishes a space three-dimensional image pair of a power sag according to the field control point and the space position information of the photo; the three-dimensional space model measurement module identifies a dotted point of the power sag in the space three-dimensional image pair and establishes a three-dimensional space model of the power sag; and the diagnosis module determines a dangerous point on the power sag according to the three-dimensional space model and inputs a detection report automatically. Continuous aerial photos are collected by using the unmanned aerial plane, the identified three-dimensional image queue sequence is constructed in the different strip photos, and space intersection measurement is carried out, thereby completing precise sag measurement of the whole line.

Description

technical field [0001] The invention relates to the technical field of power detection, in particular to a power sag detection method and system based on out-of-band aerial images. Background technique [0002] In the prior art, there are two main methods for measuring power sag: the end-of-gear method for sag observation and laser radar measurement. The end-of-gear method uses theodolite and uses geometric principles to manually measure tangents on the power tower. , to calculate the position and height of the lowest line; the laser radar measurement uses the helicopter to carry out intensive point cloud scanning and vector extraction work, and extracts the spatial position of the electric sag. The above two methods have obvious disadvantages. The sag is observed by the gear end angle method. The manual detection speed is slow and the efficiency is low. It can only measure the lowest sag point. The accuracy is at the meter level. Radar measurement requires expensive equipm...

AI Technical Summary

Problems solved by technology

Both of the above two methods have obvious disadvantages. The sag is observed by the gear end angle method. The manual detection speed is slow and the efficiency is low. It can only measure the lowest sag point. Radar measurement, expensive equipment, high cost, large amount of data processing, low efficiency, accuracy to centimeter level

It can be seen that the above two methods cannot take into account the accuracy, cost and efficiency of measurement

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