Signal processing method of acoustic emission tower crane safety detection system

An acoustic emission signal and safety detection technology, which is applied in the processing of detection response signals, material analysis using acoustic emission technology, measurement devices, etc. problem, to achieve high sensitivity measurement, high sampling rate and high conversion rate

Inactive Publication Date: 2018-07-17
BEIJING URBAN CONSTR NORTH CONSTR
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Problems solved by technology

[0005] This technical solution can realize the monitoring of the macro state during the operation of the tower crane, such as: environmental wind speed, deformation, inclination, etc., but this is only the minimum safety guarantee for the tower crane to work
There are a large proportion of serious accidents such as fractures in tower crane accidents, which are caused by load-bearing structures and local stress concentration. The detection of the above schemes cannot detect hidden damage and damage expansion, and thus cannot achieve more effective early warning
[0006] In the existing tower crane safety detection tech

Method used

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  • Signal processing method of acoustic emission tower crane safety detection system
  • Signal processing method of acoustic emission tower crane safety detection system
  • Signal processing method of acoustic emission tower crane safety detection system

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Embodiment Construction

[0018] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0019] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0020] Such as figure 1 As shown, the specific structure of the acoustic emission tower crane safety detection system according to the specific embodiment of the present invention includes: an acoustic emission sensor 1, a preamplifier 2, a data acquisition card 3 and an industrial computer 4, wherein the surface of the measured object 5 is treated Finally, use a couplant to connect to the acoustic emission sensor 1, conne...

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Abstract

The invention discloses a signal processing method of an acoustic emission tower crane safety detection system. The signal processing method of the acoustic emission tower crane safety detection system comprises the following steps: 1, denoising a signal through wavelet analysis; 2, selecting a wavelet, re-decomposing, and performing signal reconstruction to complete characteristic signal extraction; 3, performing severity pattern recognition on an acquired acoustic emission signal by using a BP neural network; 4, dividing the severity of the acoustic emission signal into a plurality of levelsaccording to an extracted characteristic signal for safety evaluation. By the signal processing method of the acoustic emission tower crane safety detection system, the acoustic emission tower cranesafety detection system can achieve early warning of early damage, can monitor expansion of the damage, has high sampling rate and high conversion rate, and can achieve high-precision and high-sensitivity measurement.

Description

technical field [0001] The invention relates to the field of tower crane safety detection, in particular to a signal processing method of an acoustic emission tower crane safety detection system. Background technique [0002] Tower crane is a kind of commonly used lifting equipment. It is subjected to various loads for a long time during use. Its load-bearing welded structure is a part that is prone to damage. In recent years, there have been many reports on tower crane safety accidents. Therefore, the safety of tower cranes Very important. The inspection of tower cranes is mainly based on regular shutdown inspection and supervisory inspection. The inspection contents mainly include: document inspection, data verification, on-site inspection and personnel inspection during the whole installation process. Routine inspection is time-consuming and labor-intensive, and cannot detect damage and expansion generated during operation in time. At the same time, even after passing t...

Claims

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Application Information

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IPC IPC(8): G01N29/14G01N29/44
CPCG01N29/14G01N29/4481G01N2291/0234
Inventor 王振兴王卫新刘毅夫许龙迪彭景祥张皞孙磊魏燕
Owner BEIJING URBAN CONSTR NORTH CONSTR
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