Telegraph pole buried depth and damage detection method based on Rayleigh waves

Abstract

The invention relates to a telegraph pole buried depth and damage detection method based on Rayleigh waves. The method comprises the steps that the position of one steel bar is judged, a contour lineis made on a land portion of a telegraph pole, and the position of the steel bar is marked on the contour line; a vibration exciter and a vibration pickup are arranged on the upper side and the lowerside of the contour line; the signals sent by the vibration exciter decrease progressively from high frequency to low frequency, and the vibration pickup starts to scan the detection signals; when thevibration pickup detects a reflection signal each time, the time consumption t, the frequency f and the wave velocity V from the time when the vibration exciter sends out the signal under the frequency to the time when the vibration pickup detects the signal are transmitted to a processing device; after measurement at each mark is completed, a broken line graph with the duration t changing from high to low relative to the frequency f is established in the processing device until all the steel bar mark points are measured, all the broken line graphs are put into a coordinate system, the characteristic frequency f0 is found, and the burial depth and damage conditions of the telegraph pole are judged in combination with the wave velocity V and the propagation time. According to the method, the buried depth of the telegraph pole can be rapidly and accurately detected, and the damage condition of the buried section telegraph pole can be detected; 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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