Burial depth and damage detection method of utility poles based on Rayleigh waves

Abstract

The burial depth and damage detection method of utility poles based on Rayleigh waves includes judging the position of the steel bars, drawing contour lines on the land part of the utility poles, and marking the positions of the steel bars on the contour lines; The vibrator is placed on both sides of the contour line and below; the signal sent by the vibrator decreases from high frequency to low frequency, and the vibrator starts to scan the detection signal; every time the vibrator detects a reflected signal, the frequency is lowered The length of time t, frequency f, and wave velocity V are transmitted to the processing device from sending the signal to the detection of the signal by the vibration pickup; after the measurement of each mark is completed, the time length t is established in the processing device with respect to the change of frequency f from high to low Line graph, until all marked points of steel bars are measured, put all the line graphs into a coordinate system, and find the characteristic frequency f 0 , combined with the wave velocity V and propagation time, to judge the buried depth and damage of the pole. The method of the invention can quickly and accurately detect the buried depth of the electric pole, and can also inspect the damage condition of the electric pole in the buried section; the method has the advantages of accurate detection and high speed.

Description

technical field [0001] The invention relates to the technical field of safety state detection of power transmission lines, in particular to a Rayleigh wave-based detection method for buried depth and damage of utility poles. Background technique [0002] The power system is composed of many parts. The substation is an indispensable part of the power system, and the ring-shaped reinforced concrete pole is an important component of the substation and transmission line. Therefore, the safe state of the ring-shaped reinforced concrete pole is to ensure the safe operation of the power system. It plays an indispensable and important role in my country's power system. In our country, since most areas belong to rural areas, circular reinforced concrete poles have been widely used. However, as the service life continues to increase, concrete cracking, steel bar corrosion, and even serious concrete shedding are prone to occur. In particular, due to the impact of natural disasters suc...

AI Technical Summary

Problems solved by technology

Both the underground spying mirror and the underground ultrasonic method need to use a drilling rig to drill holes underground for the testing device or generating device to sneak into the ground. The testing equipment is huge, time-consuming and labor-intensive, and requires multiple people to complete, and the work efficiency is low.

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