Sound signal transduction and prediction method of GTAW (gas tungsten arc welding) welding fusion penetration state

A technology of sound signal and prediction method, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of unsatisfactory description ability of dynamic time signal, and achieve the effect of good recognition effect.

Inactive Publication Date: 2012-07-04
SHANGHAI INST OF SPECIAL EQUIP INSPECTION & TECHN RES
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Although the classification and decision-making ability of ANN and SVM and the ability to describe and describe uncertain information have been recognized, t

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  • Sound signal transduction and prediction method of GTAW (gas tungsten arc welding) welding fusion penetration state
  • Sound signal transduction and prediction method of GTAW (gas tungsten arc welding) welding fusion penetration state
  • Sound signal transduction and prediction method of GTAW (gas tungsten arc welding) welding fusion penetration state

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[0036] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0037] The embodiment of the present invention relates to a sound signal sensing and prediction method of the penetration state of GTAW welding, such as figure 2 As shown, including the following steps:

[0038] (1) Design and development of arc sound and image transmission system for dynamic welding process: figure 1 As shown, the front and back sides of the molten pool in the aluminum alloy GTAW welding process are simultaneously a...

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Abstract

The invention relates to a sound signal transduction and prediction method of a GTAW (gas tungsten arc welding) welding fusion penetration state. The prediction method comprises the following steps of: utilizing a sound sensor to collect electric arc sound of a GTAW welding dynamic process, carrying out feature extraction on the electric arc sound of the collected GTAW welding dynamic process, and obtaining an electric arc sound characteristic; building a HMM(hidden markov model) model according to the obtained electric arc sound characteristic, and carrying out model training and sound fusion penetration recognition; and forecasting the GTAW welding fusion penetration state. The prediction method provided by the invention can effectively carry out real-time detection and control on welding fusion penetration.

Description

technical field [0001] The invention relates to the technical field of welding quality control, in particular to an acoustic signal sensing and prediction method for GTAW welding penetration state. Background technique [0002] Gas tungsten shielded welding ("GTAW") is one of the important processes in the manufacture of precision welding products. Especially in the high-tech industry (such as aerospace industry) to realize the automation and robotization of GTAW has important application value. [0003] In order to obtain high-precision welding quality and achieve a high level of welding automation or robot welding, it is necessary to achieve effective control of the dynamic process of welding, that is, the dynamic characteristics of the welding pool. As we all know, the GTAW process is a complex process with high nonlinearity, multi-variable coupling, and a large number of random uncertain factors, which determines that the quality control issues such as fusion width, pen...

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Application Information

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IPC IPC(8): B23K9/095
Inventor 王继锋俞厚德钱耀洲汤晓英
Owner SHANGHAI INST OF SPECIAL EQUIP INSPECTION & TECHN RES
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