Distance measuring method for power line

Abstract

The invention discloses a distance measuring method for a power line, which comprises the following steps: (1) acquiring sequence images of the power line and a crossover object under the power line to form a stereoscopic image pair; (2) extracting an image space power line in the stereoscopic image pair; (3) determining spatial coordinates of a power line point; (4) using a plumb line track method to search whether the crossover object exists in a certain distance under the power line point, and calculating the coordinates of the crossover object when the crossover object exits; and (5) according to the coordinates of the crossover object and the power line point, calculating the vertical distance of the crossover object and the power line point. The method can accurately identify the power line in the image and measure the spatial coordinates of the power line, automatically judge whether the crossover object exists in the safe distance under the power line, measure the vertical distance between the power line and the crossover object at the lower part in real time, discover the potential safety hazard, and ensure the smoothness and safety of a power supply line.

Description

technical field [0001] The invention relates to a visual measurement method, in particular to a real-time measurement method for measuring the distance between a power line and a dangerous crossover, which belongs to the fields of image processing and computer vision, and also belongs to the field of surveying and mapping science. Background technique [0002] At present, the layout of power lines is criss-crossed, especially the high-voltage lines used for long-distance power supply. Its safety is related to the stable operation of the power supply lines and the safety of residents and buildings near the high-voltage lines. things. At present, the visual measurement method is usually used to detect the distance between the power line and the dangerous crossing object. The method will be briefly described below. [0003] Visual measurement including photogrammetry and computer vision is to realize the measurement and cognition of three-dimensional space by acquiring and pro...

AI Technical Summary

Problems solved by technology

For wire ranging, refer to image 3 and Figure 4 As shown in , they are the photographic geometry of a single flight strip along a traverse and a multi-strip along a traverse. For a multi-strip traverse, two cameras need to be installed, and the relative positions between the two cameras must be fixed. However, due to the The load is limited, and there are relatively strict installation restrictions. In many cases, only a single camera is installed; for the photographic geometry of a single flight along the wire, the imaging of the wire on the image is based on parallel to the epipolar line, and it is difficult to achieve the correspondence of the wire points. Therefore, it brings great difficulties to the measurement of the wire

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