Method for detecting crane telescopic boom with special-shaped cross-section structure of crane on basis of waveform inversion
A technology of full waveform inversion and special-shaped section, which is used in measurement devices, analysis of solids using sonic/ultrasonic/infrasonic waves, and material analysis using sonic/ultrasonic/infrasonic waves. The current situation of the defect degree and health status of the heavy telescopic boom, the inability to detect quickly and accurately, etc., to achieve the effect of improving the accuracy
Active Publication Date: 2018-08-17
BEIJING UNIV OF TECH
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Problems solved by technology
[0004] The purpose of the present invention is to solve the current situation that the corrosion defect of the lifting telescopic arm with special-shaped cross-section structure of the crane is limited by the complexity of its cross-sectional structure, and cannot be quickly and accurately detected, and thus cannot effectively evaluate the defect degree and health status of the lifting telescopic arm
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[0018] Refer below Figure 1 to Figure 3 The structure and principle of the device of the present invention will be described. figure 1 It is a schematic diagram of the detection system of the present invention. The detection system is mainly composed of a multi-channel ultrasonic detector 4, an excitation sensor array 2 and an acquisition sensor array 3. The multi-channel ultrasonic detector 4 mainly functions to generate excitation signals, receive guided wave signals and analyze The function of processing to generate a reconstructed image of the defect, the excitation sensor array 2 and the acquisition sensor array 3 mainly realize the conversion of electrical signals and ultrasonic signals. In the multi-channel ultrasonic detector 4, the control module 5 realizes the control and scheduling of various hardware modules. The multi-channel excitation module 6 generates multi-channel toneburst signals. The multi-channel excitation module 6 can realize the functions of power ampl...
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The invention discloses a method for detecting a crane telescopic boom with a special-shaped cross-section structure of crane on the basis of waveform inversion, and belongs to the technical field ofnon-destructive detection. A stimulating sensor array and an acquiring sensor array are separately mounted at two ends of the crane telescopic boom with the special-shaped cross-section structure, andtransmission of whole information of a detecting instrument is dispatched by a control module. Waveform inversion is divided frequency circulating and iterative cycling. A target function is established by analysis of residual error data, and related residual error data can serve as correlated variables and are introduced into fitting calculation. After errors meet demands, iteration can be finished, frequency is changed, and a model obtained by a precious frequency serves as an initial model mk to continue carrying out repeated iteration. Finally, a simulating model can fit an actual measurement result by the waveform inversion, and imaging detection of corrosion defects of the crane telescopic boom with the special-shaped cross-section structure of the crane is realized. Waveform information in observation data is used, and the precision of defect detection is greatly improved.
Description
Technical field [0001] The invention relates to a method for detecting a lifting telescopic boom of a crane with a special-shaped cross-section structure based on a full waveform inversion method, and belongs to the technical field of nondestructive testing. Background technique [0002] Cranes are common machinery in lifting places. Because they can greatly reduce labor intensity and improve production efficiency, they play an important role in handling and loading and unloading. However, due to the important role of cranes in production and social life and their inherent dangers, the stable work of cranes is an important prerequisite for ensuring the safe and orderly progress of social production. In the working process, the lifting telescopic boom of the crane is used to lift heavy objects and is one of the most important devices on the crane. Since the lifting telescopic boom bears most of the load during work and is exposed to the complex outdoor working environment for a l...
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CPCG01N29/069G01N2291/023
Inventor 刘增华张宇高檗何存富吴斌
Owner BEIJING UNIV OF TECH