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Development of Real Time Monitoring and Diagnosting System for CO2 Welding Process Based on Labview

Author: LanLing
Tutor: LiDongQing
School: Harbin Institute of Technology
Course: Materials Processing Engineering
Keywords: LabVIEW CO2 welding Virtual Instrument Online Monitoring
CLC: TG441.7
Type: Master's thesis
Year: 2008
Downloads: 90
Quote: 1
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Abstract


Arc welding quality reflects the performance and stability of the welding process , is key to determine the quality of weldment . As the complexity of the arc welding process , welding quality analysis facing many difficulties , is a hot topic in the welding industry . Based on the idea of ??virtual instruments and features , initially established based on LabVIEW for CO2 welding quality real-time monitoring and diagnostic system . The system consists of hardware signal acquisition circuit and LabVIEW as platform software. According to the characteristics of arc welding , hardware acquisition circuit design uses a dual MCU structure , the use of high-speed dual -port RAM to achieve information sharing between dual MCU and completed a double MCU structure communication board and acquisition board circuit design. C51 program will be prepared to write a good chip after the acquisition system software debugging. Upon completion of the design of the hardware acquisition device , the system uses the LabVIEW establishment quality monitoring and analysis system. By the signal acquisition , real-time waveform display, waveform playback , save the file and calls , signal analysis , database connectivity six modules. The system has a real-time acquisition and display the electrical parameters of the welding process waveform ; through LabSQL establish a connection with the database , you can call database functions for data storage and call ; using different analytical tools to analyze the welding process ; can be stored in text files welding process real-time information ; can be played welding current and voltage waveforms . By short transition CO2 welding droplet experiments to prove the design of hardware acquisition circuit and preparation software program is feasible. Complete and reliable data collection through experiments given time the current and voltage waveforms , UI , waveforms derivative plot , short charts etc., can be analyzed to achieve the desired results. The system on the one hand on the welding quality online monitoring and analysis to provide a reference and guidance. On the other hand it is possible to analyze the welded electrical parameters studied, and weld quality information , for a more in-depth study of the arc welding process burning droplet short-circuit transient characteristics , mechanism , optimizing welding system designed to provide a theoretical basis and standards. Powerful instrument , according to the actual needs and easy to extend the functionality , modify, and has broad application prospects.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Welding, metal cutting and metal bonding > Welding process > General approach > Welding defects and quality inspection
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