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Insulator nondestructive testing technique based on resonant acoustic principle

A non-destructive testing and insulator technology, which is applied in measuring devices, scientific instruments, analyzing solids using sonic/ultrasonic/infrasonic waves, etc., to achieve the effect of high detection efficiency and wide detection range

Inactive Publication Date: 2017-08-08
YANCHENG POWER SUPPLY CO STATE GRID JIANGSU ELECTRIC POWER CO +2
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Problems solved by technology

Commonly used testing methods include ultrasonic testing, ultraviolet imaging testing, and infrared testing, but these three nondestructive testing methods for porcelain insulators have serious limitations, and cannot ensure the need for online, reliable, and rapid assessment of the safety status of porcelain insulators in power systems

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  • Insulator nondestructive testing technique based on resonant acoustic principle

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Embodiment Construction

[0018] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0019] refer to figure 1 , a non-destructive testing technology for insulators based on the principle of resonant acoustics, adopts the modal analysis method, and realizes non-destructive testing through a single-degree-of-freedom oscillator system. The single-degree-of-freedom oscillator system includes mass block 1, spring 3 and damper 2. The basic elements are mass m, stiffness k and damping c. The state of the system can be described by the displacement of the mass block 1. The energy input to the system by the exciting force F is expressed as the kinetic energy of the mass block 1 and the elastic potential energy of the spring 3, and is determined by the damping 2 In constant dissipation, the mathematical expre...

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Abstract

The invention discloses an insulator nondestructive testing technique based on a resonant acoustic principle, a modal analysis method is used, nondestructive testing can be realized by a single-degree-of-freedom oscillator system, the single-degree-of-freedom oscillator system comprises a mass block, a spring and damping, the three basic elements of the system are quality m, stiffness k and damping c, the state of the system can be described by the displacement of the mass block, energy input into the system by exciting force F is shown as kinetic energy of the mass block and elastic potential energy of the spring, defective parts can effectively be selected from qualified parts by the continuous dissipative damping resonant acoustic technology, and the insulator nondestructive testing technique has a wide detection range, and can detect all defects in a whole insulator, detection efficiency is high, and the insulator large area survey can be achieved.

Description

technical field [0001] The invention relates to the technical field of insulator detection, in particular to an insulator non-destructive detection technology based on the principle of resonant acoustics. Background technique [0002] Vibration refers to a process of state change, that is, the reciprocating motion of an object. It is a common physical phenomenon and its application is very extensive. As we all know, the waveform generated by vibration will propagate along a straight line, and has certain time and space laws. With the help of this principle, it will have a very significant effect when it is applied to the flaw detection of equipment and instruments. Porcelain post insulator is a special insulation control, which is widely used in substations and transmission lines. However, due to the complex working environment of porcelain post insulators and long-term influence by the external environment, cracks or other defects are prone to appear, reducing the insulati...

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Application Information

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IPC IPC(8): G01N29/04
CPCG01N29/045G01N2291/023
Inventor 张庆富陆杨刘安宏何育
Owner YANCHENG POWER SUPPLY CO STATE GRID JIANGSU ELECTRIC POWER CO
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