High-precision monitoring method for three-dimensional displacement track of power transmission line tower footing
A transmission line, high-precision technology, used in height/level measurement, measurement devices, mapping and navigation, etc., can solve problems such as measurement errors and difficulty in distinguishing whether the measurement object is displaced or not.
Active Publication Date: 2020-02-28
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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[0045] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.
[0046] 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 foundation, and measure the angle between the line trend and the CGCS2000 coordinate system. By performing coordinate transformation and solving for the above sensor measurement data, the displacement vectors of the center points and vertices of the tower foundation are obtained....
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The invention provides a high-precision monitoring method for a three-dimensional displacement track of a power transmission line tower footing. The high-precision monitoring method comprises the steps of: firstly, defining a coordinate system based on the center of the upper surface of the tower footing, and drawing an initial track of the tower footing; measuring a three-dimensional high-precision displacement vector at the ground surface of the tower footing by adopting a Beidou satellite positioning device; adopting a three-dimensional inclinometer to measure an inclination angle and an inclination direction of the tower footing; adopting a compass for measuring a torsion angle of the tower footing in the horizontal direction, measuring an included angle between a line route and a CGCS2000 coordinate system, performing coordinate transformation and solution on measurement data of the sensors to obtain displacement vectors of all central points and vertexes of the tower footing, andredrawing to obtain a three-dimensional deformation track of the tower footing according to a 1-4 h monitoring period. The high-precision monitoring method can monitor three-dimensional displacementsettlement as well as inclination and torsional deformation of the tower footing, periodically draws the three-dimensional displacement deformation track of the whole tower footing, and reflects the foundation bottom displacement and settlement conditions, so as to evaluate the stress condition and the structural stability of the whole tower footing.
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