Monocular vision measuring method for iron tower

A measurement method and monocular vision technology, applied in the direction of measuring devices, instruments, optical devices, etc., can solve the problems of less data information, slow measurement speed, and inability to measure all rods

Inactive Publication Date: 2012-09-12
STATE GRID HEBEI ENERGY TECH SERVICE CO LTD +1
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Problems solved by technology

However, the measurement speed of these methods is slow, th...

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  • Monocular vision measuring method for iron tower
  • Monocular vision measuring method for iron tower
  • Monocular vision measuring method for iron tower

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Embodiment Construction

[0054] A tower fell down, and the analysis of the cause requires knowing the height of the tower. Since the tower has fallen down, there is no measurement condition, but there is a photo of the tower. The file name of the photo is IMG_4375.jpg, which shows that the camera is CANON EOS350D, and the focal length is 91mm , with a pixel size of 2496×1664.

[0055] In order to calculate the height of the tower. Use this camera to take pictures of objects of known size with 2496×1664 pixels, the focal length f is 94mm, and the object distance L 1 It is 3566mm, and the actual size B is known 1 30mm, the pixel difference ΔX corresponding to the real object 1 for 98. Substituting formula (1) to calculate the k value of the camera is 123.9.

[0056] According to the formula (1), it can be deduced that the distance L from the position where the iron tower was photographed at that time is:

[0057] (13)

[0058] The root opening B of the iron tower is 3083mm, a...

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Abstract

The invention relates to a monocular vision measuring method for an iron tower. According to the method, the measurement of rod pieces of the iron tower in a full-width photo is realized by the actual length represented by unit pixel distance at a specific position in the photo. The method is finished by the following processes of: camera calibration, camera elevation (vertical angle) measurement, camera visual angle (divergence angle) calculation, image correction and the like, wherein the camera calibration is finished at one time; the image correction, the divergence angle calculation and the like can be finished by computer programs; and therefore, a rapid measurement task is realized. According to the method provided by the invention, the measurement work can be finished rapidly only by using a camera and a range finder; the iron tower only needs to be shot once, and then image calculation and processing are performed in an office, so that the aim of measuring the iron tower is fulfilled without influence caused by charged and weather conditions; much data information is obtained by the measurement; and all rod pieces can be measured at the same time.

Description

technical field [0001] The invention relates to a monocular vision measurement method for an iron tower. Background technique [0002] After installation and during operation, the iron tower will be deformed due to various reasons such as tilting, bending, twisting, etc. When the deformation exceeds the standard allowable value, the iron tower needs to be dealt with, otherwise it may collapse under the influence of bad weather and other factors. tower accident. Supervising the deformation of the iron tower is also an important content of the iron tower supervision. At present, the measurement of the iron tower is carried out by total station, theodolite or hanging wire on the tower. However, the measurement speed of these methods is slow, and the measurement is easily affected by electrification, weather, etc. and cannot be completed. The data obtained by the measurement is less, and all the rods cannot be measured at the same time. Contents of the invention [0003] Th...

Claims

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Application Information

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IPC IPC(8): G01B11/16
Inventor 冯砚厅
Owner STATE GRID HEBEI ENERGY TECH SERVICE CO LTD
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