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Online monitoring system and monitoring method for structural damages of transmission iron tower

A technology for transmission towers and structural damage, applied in signal transmission systems, testing of machine/structural components, collectors, etc.

Inactive Publication Date: 2018-10-19
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, manual inspections are difficult to detect small deformations and cracks in time, and can only be found when major accidents or obvious deformations and cracks occur

Method used

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  • Online monitoring system and monitoring method for structural damages of transmission iron tower
  • Online monitoring system and monitoring method for structural damages of transmission iron tower
  • Online monitoring system and monitoring method for structural damages of transmission iron tower

Examples

Experimental program
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Effect test

Embodiment

[0142] Utilize the on-line monitoring system and monitoring method for the structure damage of the transmission tower of the present invention, the 110Kv, three towers and two-gear transmission towers of Xi'an Polytechnic University Lintong Campus are measured, and the results are as follows Figure 4 , Figure 5 shown, from Figure 4 with Figure 5 The natural frequency data of the extracted data are shown in Table 1.

[0143] in, Figure 4 The first seven natural frequencies of the transmission tower system extracted by this method when the structure is intact. Figure 5 It is the measured result when replacing part of the tower material with deformation and cracking. Figure 4 , the abscissa represents the natural frequency ω of the tower when the structure is intact 0 (unit Hz); Figure 5 , the abscissa represents the natural frequency ω of the tower when the structure is damaged i ;

[0144] from Figure 4 , Figure 5 It can be seen from the figure that this met...

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Abstract

The invention discloses an online monitoring system for structural damages of a transmission iron tower. The online monitoring system is composed of a controller, a main control unit and a 4G wirelessmodule that are connected successively. The controller is also connected with a storage battery. The main control unit is also connected with a driving module, an excitation device, a charge amplifier, and an A / D module; the A / D module is also connected to the main control unit; the charge amplifier is connected to an acceleration sensor; and the 4G wireless module is connected to the monitoringcenter. Therefore, online monitoring of cracking and deformation of the transmission iron tower is realized. In addition, the invention also discloses an online monitoring method for damages of a transmission iron tower structure. The excitation device is used for generating pulse excitation; the acceleration sensor picks up acceleration information; fast Fourier transform is carried out to obtaina frequency domain signal; on the basis of a least squares complex frequency domain method, modal parameters of the transmission tower are identified; and the relationship with the model parameters in a complete structure state is analyzed to realize online monitoring of the structural damages of the transmission iron tower.

Description

technical field [0001] The invention belongs to the technical field of state monitoring and diagnosis of transmission lines, and in particular relates to an online monitoring system for structural damage of transmission iron towers, and also relates to a monitoring method using the online monitoring system. Background technique [0002] In the power system, the transmission tower is an important part of power transmission, and its safe operation is an important factor to ensure the ability of power transmission. In recent years, with the continuous promotion of EHV lines and UHV lines, there are more and more long-span transmission lines. However, due to the complex terrain of our country, it is inevitable that the transmission tower will pass through complex terrain such as river beaches, deserts, and hills. Transmission towers are susceptible to structural damage caused by wind, sand and rain erosion, coupled with earthquakes, deformation and collapse accidents occur from...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M5/00G08C17/02H02J7/35
CPCG01M5/0033G01M5/0041G01M5/005G01M5/0058G01M5/0066G08C17/02H02J7/35
Inventor 黄新波赵钰赵隆郑天堂
Owner XI'AN POLYTECHNIC UNIVERSITY
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