Studies on Strengthening Techniques for Existing Transmission Line and Communication Towers

Tilt detection method for transmission line tower construction based on quadratic point cloud matching

“…Assuming that the laser point cloud dataset G 、 R contains g N 、 r N and points in sequence, it is defined as point sets   i g and   i r . When iterating the nearest method, the nearest points of two point clusters are found and the sum of squares of their Euclidean distances is minimized [5] .…”

“…Transmission line towers are prone to tilt during construction. Using the methods of reference [2] and reference [3] as comparison methods, the tower inclination position is determined by the minimum bounding rectangle of layered point cloud, and the tower inclination effect is displayed intuitively. The main material, inclined material and internode structure in the test tower are inclined.…”

“…According to Figure 2, the proposed method can accurately locate the inclined position in the test tower, and obtain the inclined structure as main material, inclined material and internode structure. The method in reference [2] can only locate the inclined material, and there is a certain error. The method in reference [3] can locate the inclined position in some towers, and can determine the main material of towers and the inclined material.…”

“…Using the methods in Reference [2] and Reference [3] as comparison methods, the matching deviation curves of the three point cloud matching methods are shown in Figure 3. From the point cloud matching deviation curve results in Figure 3, it can be seen that the matching deviation distance of the method in Reference [3] is the highest, reaching a maximum of 0.78m; The maximum matching deviation distance of the method in Reference [2] is 0.6m, and the matching deviation curve is very unstable; The matching deviation distance of the method in this article is only between 0.04m-0.15m, and the point cloud matching deviation is very small, which fully meets the standard requirements of actual transmission line tower point cloud matching.…”

“…Transmission line towers as the most core main part of the transmission system, transmission line tower construction tilt detection has practical significance for the safe and stable operation of the entire power system. Reference [2] proposes a structural health monitoring method for transmission line towers. The natural frequencies are evaluated by using the modified bolted connection model and experimentally verified by a push-pull mechanism for the subslabs of the pole tower.…”