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Ultrasonic guided wave nondestructive testing device and damage identification method for transmission conductor

A technology of ultrasonic guided waves and power transmission wires, which is applied in the generation of ultrasonic/sonic/infrasonic waves, the use of sound waves/ultrasonic/infrasonic waves to analyze solids, and the processing of detection response signals. It can solve misjudgment, low efficiency, and detection of casualties, etc. problem, to achieve the effect of improving detection efficiency and simplifying the structure

Pending Publication Date: 2021-04-20
WENZHOU ELECTRIC POWER BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have a certain degree of defects, and there are unavoidable problems in universality, operation difficulty, and detection accuracy, such as manual visual inspection (helicopter assistance), manual visual inspection takes a long time and is inefficient. And it is prone to human misjudgment, and the use of helicopter auxiliary detection in the air is also easy to cause casualties of detection personnel due to helicopter failure

Method used

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  • Ultrasonic guided wave nondestructive testing device and damage identification method for transmission conductor
  • Ultrasonic guided wave nondestructive testing device and damage identification method for transmission conductor
  • Ultrasonic guided wave nondestructive testing device and damage identification method for transmission conductor

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Embodiment 1

[0034] like figure 1 , figure 2 As shown, an ultrasonic guided wave non-destructive testing device for a power transmission wire includes a controller 1 and an ultrasonic guided wave detection assembly 2 installed on a power transmission wire 9. The ultrasonic guided wave detection assembly 2 includes a magnet 3 and is wound on a power transmission wire The first coil 4 and the second coil 5 on the wire 9, the first coil 4 and the magnet 3 form an electromagnetic ultrasonic guided wave detection mechanism for detecting the aluminum twisted wire structure layer of the power transmission wire 9, the second coil 5 and the magnet 3 form a Lorentz force ultrasonic guided wave detection mechanism for detecting the steel core structure layer of the transmission wire 9, and the electromagnetic ultrasonic guided wave detection mechanism and the Lorentz force ultrasonic guided wave detection mechanism both include excitation terminals and a receiving end, the receiving end is connecte...

Embodiment 2

[0040] This embodiment discloses a damage identification method for a power transmission wire, which is used to process the signal sent by the ultrasonic guided wave nondestructive testing device described in Embodiment 1. The damage identification method includes the following steps in sequence:

[0041] Step 1: Establish the waveform dictionary matrix of ultrasonic guided wave propagation for different materials and different propagation distances. The wave forms of guided wave propagation at different distances on the steel core are as follows Figure 5 As shown, the waveform vector d of different propagation distances is obtained m , and the waveform vectors of all propagation distances form a dictionary matrix D, where:

[0042]

[0043] in,

[0044]

[0045] Step 2: the dictionary matrix D that obtains based on step 1 carries out sparse Bayesian learning to the actually received signal y, and its linear model is: y=Dw, namely:

[0046]

[0047] Among them: y i...

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Abstract

The invention relates to an ultrasonic guided wave nondestructive testing device for a transmission conductor, and the device comprises a controller and an ultrasonic guided wave detection assembly, the ultrasonic guided wave detection assembly comprises a magnet, a first coil and a second coil, and the first coil and the magnet form an electromagnetic ultrasonic guided wave detection mechanism, the second coil and the magnet form a Lorentz force ultrasonic guided wave detection mechanism. The device has the advantages that: the electromagnetic ultrasonic guided wave detection mechanism and the Lorentz force ultrasonic guided wave detection mechanism are used for detecting a aluminum stranded wire structure layer and a steel core structure layer of the transmission conductor respectively, as ultrasonic guided wave is suitable for long-distance detection, nondestructive detection of the transmission conductor can be realized by mounting the device at one end, and real-time receiving of a detection signal is realized through the controller, so that damage detection of an outer-layer aluminum wire and an inner-layer steel core structure layer of the steel-cored aluminum strand of the transmission conductor is realized. In addition, the invention also provides a damage identification method for a transmission conductor, and the method is used for processing signals sent by the ultrasonic guided wave nondestructive testing device.

Description

technical field [0001] The invention relates to an ultrasonic guided wave non-destructive testing device and a damage identification method for a power transmission wire. Background technique [0002] Transmission wires transmit power across long distances in the transmission network, and are the core skeleton of energy allocation in infrastructure construction. During the service process of transmission wires, due to their large spans and large areas of exposure to the environment, they are vulnerable to various factors. Influences, such as the influence of tensile stress and voltage stress, the influence of wind-induced vibration, icing, ice melting and lightning strikes in the environment, and the possible existence of damage caused by man-made damage. When the transmission wire itself has initial structural manufacturing defects, under the influence of external factors, the defects will further expand and develop, resulting in breakage of the protective layer, damage to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/34G01N29/44G01N29/48
Inventor 朱云祥陈哲吴宇奇屠锋郑翀曹枚根周文松
Owner WENZHOU ELECTRIC POWER BUREAU
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