A high-precision monitoring method for three-dimensional displacement trajectory of transmission line tower foundation
A high-precision, tower-based technology, applied in height/level measurement, measuring devices, surveying and navigation, etc., can solve problems such as measurement errors and difficulty in distinguishing whether the measurement object is displaced.
Active Publication Date: 2021-10-26
STATE GRID HUBEI ELECTRIC POWER RES INST +1
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Problems solved by technology
When the cumulative error exceeds the displacement of the tower foundation, it will be difficult to distinguish whether the measurement object has displaced, and measurement errors will occur
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[0046] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.
[0047] In the present invention, the coordinate system is first defined by the center of the upper surface of the tower base, and the initial trajectory of the tower base is drawn; then the Beidou satellite positioning device is used to measure the three-dimensional high-precision displacement vector at the ground surface of the tower base; the three-dimensional inclinometer is used to measure the inclination angle and direction of the tower base; Use a compass to measure the torsion angle in the horizontal direction of the tower base, and measure the angle between the line direction and the CGCS2000 coordinate system, and obtain the displacement vectors of the center points and vertices of the tower base by performing coordinate transformation and solving the above sensor measurement data According to t...
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The invention provides a high-precision monitoring method for the three-dimensional displacement trajectory of the tower foundation of the transmission line. Firstly, the coordinate system is defined by the center of the upper surface of the tower foundation, and the initial trajectory of the tower foundation is drawn; Vector; use a three-dimensional inclinometer to measure the inclination angle and direction of the tower foundation; use a compass to measure the torsion angle in the horizontal direction of the tower foundation, and measure the angle between the line direction and the CGCS2000 coordinate system, and coordinate the measurement data of the above sensors Transform and solve to obtain the displacement vectors of each center point and apex of the tower foundation, and draw repeatedly to obtain the three-dimensional deformation trajectory of the tower foundation according to the monitoring cycle of 1-4 hours. The present invention can monitor the three-dimensional displacement and settlement as well as the tilting and torsional deformation of the tower foundation, periodically draw the three-dimensional displacement and deformation trajectory of the tower foundation as a whole, and reflect the displacement and settlement of the bottom of the foundation, so as to evaluate the stress situation and structural stability of the tower foundation as a whole.
Description
technical field [0001] The invention relates to the field of tower monitoring of transmission lines, in particular to a high-precision monitoring method for three-dimensional displacement tracks of tower foundations of transmission lines. Background technique [0002] Since the transmission lines stretch for hundreds to thousands of kilometers, the geographical distribution is vast, and the external environment is harsh, they are easily affected by geological disasters such as collapses, landslides, mudslides, karst area subsidence, and ground subsidence in goafs, resulting in harsh conditions such as tower tilting and tower collapse. Accidents have seriously threatened the safe and stable operation of transmission lines. [0003] When the transmission line suffers from geological disasters such as landslides, goaf subsidence, and karst settlement, it will cause displacement and settlement of the tower foundation. Due to the uneven displacement and settlement of the rock an...
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IPC IPC(8): G01C5/00G01C9/00G01B21/02G01B21/32
CPCG01B21/02G01B21/32G01C5/00G01C9/00
Inventor 冯志强周学明胡丹晖马建国张耀东汪涛周玎王万昆
Owner STATE GRID HUBEI ELECTRIC POWER RES INST