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Method for detecting and evaluating sound emission of crane

An acoustic emission detection and crane technology, applied in the field of non-destructive testing, can solve problems such as inapplicability, structural type and detection signal influence, and achieve the effect of avoiding danger

Inactive Publication Date: 2010-01-06
CHINA SPECIAL EQUIP INSPECTION & RES INST
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Problems solved by technology

The existing acoustic emission testing methods are mainly the acoustic emission testing of metal pressure vessels and the evaluation method of the results. Since metal pressure vessels are static load equipment, while cranes are moving equipment, their structure and detection signals are greatly affected by the environment. Existing method does not apply

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  • Method for detecting and evaluating sound emission of crane
  • Method for detecting and evaluating sound emission of crane
  • Method for detecting and evaluating sound emission of crane

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Embodiment Construction

[0030] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] In this embodiment, a bridge crane is taken as an example, and the method for detecting and evaluating the crane through acoustic emission technology includes the division of the activity and intensity of the acoustic emission location source area, and the evaluation of the risk degree of the acoustic emission source, including the following steps:

[0032] 1. According to the requirements of crane detection, the basic requirements of the acoustic emission detection system are stipulated, including the recommended resonant response frequency range of the probe (ie sensor) in the range of 100kHz to 400kHz, the basic requirements of the preamplifier and the acoustic em...

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Abstract

The invention discloses a method for detecting and evaluating sound emission of a crane, comprising the following steps: arranging a sensor required by detecting sound emission at a detection portion of the crane; performing loading circulations on the crane to be detected twice, recording sound emission in the loading process, determining a source region of sound emission and determining the activity and the strength of a sound emission source; and evaluating integration levels of the sound emission source according to the activity and the strength of the source emission source to determine the dangerous degree of the sound emission source. By sound emission detection, the invention can perform integral non-destructive detection on the metal structure of the crane to obtain the dangerous degree of the sound emission source in the crane, evaluate the integrity of the crane structure and avoid dangers.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to a method for non-destructive testing and evaluation of cranes through acoustic emission technology. Background technique [0002] The phenomenon of transient elastic waves generated by the rapid release of energy from local sources in materials is called Acoustic Emission (AE for short), sometimes also called stress wave emission. Deformation and crack growth of materials under stress are important mechanisms of structural failure. Such sources, which are directly related to deformation and fracture mechanisms, are called acoustic emission sources. In recent years, another type of elastic wave sources that are not directly related to deformation and fracture mechanisms, such as fluid leakage, friction, impact, and combustion, are called other or secondary acoustic emission sources. Acoustic emission is a common physical phenomenon. The frequency range of acousti...

Claims

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Application Information

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IPC IPC(8): G01N29/14
Inventor 沈功田吴占稳
Owner CHINA SPECIAL EQUIP INSPECTION & RES INST
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