A Novel Monocular Vision Technique for the Detection of Electric Transmission Tower Tilting Trend

Abstract

Transmission lines are primarily deployed overhead, and the transmission tower, acting as the fulcrum, can be affected by the unbalanced force of the wire and extreme weather, resulting in the transmission tower tilt, deformation, or collapse. This can jeopardize the safe operation of the power grid and even cause widespread failures, resulting in significant economic losses. Given the limitations of current tower tilt detection methods, this paper proposes a tower tilt detection and analysis method based on monocular vision images. The monocular camera collects the profile and contour features of the tower, and the tower tilt model is combined to realize the calculation and analysis of the tower tilt. Through this improved monocular visual monitoring method, the perception accuracy of the tower tilt is improved by 7.5%, and the axial eccentricity is accurate to ±2 mm. The method provides real-time reliability and simple operation for detecting tower inclination, significantly reducing staff inspection intensity and ensuring the power system operates safely and efficiently.

Intelligent acceptance check for towers of overhead transmission line based on point clouds

“…In addition, we also compared our method with existing methods [16][17][18]32], as shown in Table 5. The compared methods depend on the centreline fitting to calculate the tile angle of a tower, and errors show larger once some of the sampled points for fitting are noise points incorrectly.…”

“…Obviously, the training data are difficult to be obtained. Recently, a method uses a monocular camera to collect the outline of towers from multiple perspectives, and some tower tilt models are combined to realize the calculation of the tilt angle [18], but this method needs to manually define the outline points of a tower.…”

“…Obviously, the training data are difficult to be obtained. Recently, a method uses a monocular camera to collect the outline of towers from multiple perspectives, and some tower tilt models are combined to realize the calculation of the tilt angle [18], but this method needs to manually define the outline points of a tower. The accuracy and efficiency should be considered carefully for the acceptance check of overhead transmission line, and meantime the algorithms need to be stable and robust for the applications in complex and changeable environments.…”

“…These all bring great difficulties to manual acceptance check. With the rapid development of lidar technology, there has been initial progress in tower localization [3][4][5][6][7][8][9][10], the detection of tilt angle for towers [11][12][13][14][15][16][17][18], and the sag detection for power lines [19][20][21]. However, these works are mainly used for patrol inspection not for acceptance check that requires strictly high accuracy for data processing.…”

Rotor Fatigue Life Calculation Using Constant-Amplitude Load Cycles for an Interior Permanent Magnet Synchronous Motor

“…Finite element and experimental fatigue results for an IPMSM rotor validated with a constant amplitude load cycle show that the calculated fatigue life is 1.6 times lower than the experimental values, which is a reasonably good calculate for fatigue life [22]. Constant amplitude load cycles have been used to evaluate the rotor fatigue experimentally to expedite the fatigue testing [23]. Experimental strain/stress data should be used to calculate the damage of a component.…”