Online monitoring system and monitoring method for iron tower subsidence based on natural wind excitation
A monitoring system and natural wind technology, applied in measuring devices, surveying and navigation, height/horizontal measurement, etc., can solve problems such as loss of people's life and property, threats to the safe operation of the transmission network, interruption of transmission lines and communication networks, etc.
Active Publication Date: 2018-05-01
XI'AN POLYTECHNIC UNIVERSITY
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Problems solved by technology
The settlement and inclination of the tower body will often cause interruption of transmission lines and communication networks, and serious tower collapse accidents will occur
These will pose a great threat to the normal operation of the safe operation of the transmission network, and cause losses to people's lives and property.
[0003] Since most of the transmission towers are distributed in the wild, it will consume a lot of manpower and material resources if the traditional personnel inspection method is used for monitoring, and the reliability of the implementation is difficult to guarantee
Method used
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[0083] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0084] The present invention is based on the iron tower subsidence online monitoring system under natural wind excitation, such as figure 1 As shown, it includes a front-end monitoring device 1 , a 4G communication unit 2 and a monitoring center 3 connected in sequence.
[0085] Wherein, the front-end monitoring device 1 includes a three-axis acceleration sensor 1-1, a conditioning module 1-2, an AD conversion module 1-3, and a microprocessor 1-4 connected in sequence, and the microprocessor 1-4 is connected to the 4G communication unit 2 .
[0086] The installation process of the system is as follows: first, several triaxial acceleration sensors 1-1 are installed on the main material of the tower body at the intersection of the transmission line iron tower cross arm and the ground wire, at the tower body bottle mouth, and at a height of 30m...
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The invention discloses an online monitoring system for iron tower subsidence based on natural wind excitation. The online monitoring system structurally comprises an optical three-axis acceleration transducer, a conditioning module, an A / D (Analogue / Digital) conversion module, a microprocessor, a 4G communication unit and a monitoring center. The invention further discloses a monitoring method; the monitoring method specifically comprises the following four steps: carrying out iron tower modeling and mode analysis, processing an acceleration signal, carrying out mode analysis on the acceleration signal of an iron tower and carrying out iron tower subsidence diagnosis. The microprocessor adopted by the system contains a high-precision Kalman filter algorithm and is used for obtaining accurate measured value. The monitoring center is used for carrying out the mode analysis on measured data to obtain an actual damping ratio matrix of the iron tower; a theoretical damping ratio matrix ofthe iron tower is obtained through simulation. Whether the power transmission iron tower has subsidence or not is judged through comparing and analyzing actual value and theoretical value, so that online monitoring of the subsidence of the power transmission iron tower is realized.
Description
technical field [0001] The invention belongs to the technical field of state monitoring and diagnosis of power transmission lines, and in particular relates to an online monitoring system for steel tower settlement based on natural wind excitation, and also relates to a monitoring method using the 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 power transmission. Due to the complex terrain conditions in our country and the harsh external natural environment, the power transmission line towers often have displacement, tilting, cracking, sinking and other phenomena, especially in soft soil areas such as deserts. In recent years, due to some natural phenomena (such as rain and snow, strong wind, etc.) and coal mining, engineering construction, man-made sabotage and other reasons, the tower body has sometimes caused the tower to settle...
Claims
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IPC IPC(8): G01C5/00
CPCG01C5/00
Inventor 黄新波赵钰赵隆郑天堂
Owner XI'AN POLYTECHNIC UNIVERSITY