The Experts below are selected from a list of 2436 Experts worldwide ranked by ideXlab platform

Lightmart - One of the best experts on this subject based on the ideXlab platform.

Yasuo Suga - One of the best experts on this subject based on the ideXlab platform.

  • comparison of particle swarm optimization and genetic algorithm for molten pool detection in fixed Aluminum Pipe welding
    International Journal of Technology, 2011
    Co-Authors: Ario Sunar Baskoro, Yasuo Suga, Rui Masuda, Kampus Baru
    Abstract:

    This paper proposes a study on the comparison of particle swarm optimization with genetic algorithm for molten pool detection in fixed Aluminum Pipe welding. The research was conducted for welding of Aluminum alloy Al6063S-T6 with a controlled welding speed and a Charge-couple Device (CCD) camera as vision sensor. Omnivision-based monitoring using a hyperboloidal mirror was used to detect the molten pool. In this paper, we propose an optimized brightness range for detecting the molten pool edge using particle swarm optimization and compare the results to genetic algorithm. The values of the brightness range were applied to the real time control system using fuzzy inference system. Both optimization methods showed good results on the edge detection of the molten pool. The results of experiments with control show the effectiveness of the image processing algorithm and control process.

  • Welding Penetration Control for Aluminum Pipe Welding Using Omnidirectional Vision-based Monitoring of Molten Pool
    QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY, 2009
    Co-Authors: Ario Sunar Baskoro, Masashi Kabutomori, Rui Masuda, Yasuo Suga
    Abstract:

    This paper presents a study on a new method of welding penetration control for Aluminum Pipe in Tungsten Inert Gas (TIG) welding using omnidirectional vision-based monitoring of molten pool. As circumferential butt-welded Pipes and the application of Aluminum alloy in Pipe welding that has been use in various industrial sectors requires new technique of welding monitoring process. For Pipe welding using constant arc current and welding speed, the bead width becomes wider as the circumferential welding of small diameter Pipes progresses. In order to avoid the errors and to obtain the uniform weld bead over the entire circumference of the Pipe, the welding conditions should be controlled. This research studies the intelligent welding process of Aluminum alloy Pipe 6063S-T5 in fixed position using the AC welding machine. The monitoring system used an omnidirectional camera to monitor backside image of molten pool. A new method of image processing algorithm was implemented to process the captured image and to recognize the edge of molten pool. Back bead width as the result of detection was delivered into fuzzy inference system to control welding speed. From the experimental results it shows the effectiveness of the control system that is confirmed by sound weld of experimental results.

  • Monitoring of Backside Image of Molten Pool during Aluminum Pipe Welding Using Vision Sensor
    Materials Science Forum, 2008
    Co-Authors: Ario Sunar Baskoro, Masashi Kabutomori, Yasuo Suga
    Abstract:

    This paper proposes an image sensing system for the TIG (Tungsten Inert Gas) welding process of Aluminum Pipe. In automatic welding process, it is important to recognize the molten pool during the welding process. The use of CCD camera as vision sensor obtains the information of molten pool. The research was conducted for welding of Aluminum alloy Al6063S-T5 with controlled welding speed and the AC welding polarity. Firstly, histogram analysis and range of brightness threshold was established. Secondly, by using the differential value of brightness of molten pool, the edge of molten pool can be detected. Finally, to overcome the unsteady detected edge, the ellipse approximation was used to obtain the image parameters, which are width, length and area. From the experiments it is shown that the recognition of molten pool using vision sensor is an effective method.

  • Automatic Welding System of Aluminum Pipe by Monitoring Backside Image of Molten Pool Using Vision Sensor
    Journal of Solid Mechanics and Materials Engineering, 2008
    Co-Authors: Ario Sunar Baskoro, Masashi Kabutomori, Yasuo Suga
    Abstract:

    An automatic welding system using Tungsten Inert Gas (TIG) welding with vision sensor for welding of Aluminum Pipe was constructed. This research studies the intelligent welding process of Aluminum alloy Pipe 6063S-T5 in fixed position and moving welding torch with the AC welding machine. The monitoring system consists of a vision sensor using a charge-coupled device (CCD) camera to monitor backside image of molten pool. The captured image was processed to recognize the edge of molten pool by image processing algorithm. Neural network model for welding speed control were constructed to perform the process automatically. From the experimental results it shows the effectiveness of the control system confirmed by good detection of molten pool and sound weld of experimental result.

Koichi Masubuchi - One of the best experts on this subject based on the ideXlab platform.

  • Butt Welding Experiment on Aluminum Pipe by Space GHTA Welding Process with Wire Feed under Simulated Space Environment
    JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, 2011
    Co-Authors: Yoshikazu Suita, Hiroki Sogawa, Masahiro Oohara, Hidetoshi Fuke, Yoshiyuki Tsukuda, Shinichiro Shobako, Noboru Terajima, Koichi Masubuchi
    Abstract:

    The Gas Hollow Tungsten Arc (GHTA) welding experiments on Aluminum Pipe were carried out in a simulated space environment and a ground 1G vacuum environment. The square butt welding joints with non root gap on Aluminum Pipe were made by orbital welding with filler metal using DC-pulsed power supply in the vacuum chamber under the 10-2G and 1G gravity conditions. The butt welding phenomenon during the Aluminum DC-pulsed GHTA welding with filler metal recorded in the high-speed video image were analyzed and also the macrostructure and mechanical properties of the butt weld joints were investigated. As the result, it was clarified that the arc discharge and melting-solidifying process during DC-pulsed GHTA welding were insensitive to the gravity condition, because the welding phenomenon greatly receives the effect of the impulsive arc pressure in pulsed current. And also, the GHTA welding experiments under simulated space environment proved that the DC-pulsed GHTA welding process with filler metal could produce the defect-free Aluminum butt welding joints with the enough strength safely.

  • Welding experiments of aluminium Pipe by space GHTA welding in aircraft-borne simulated space environment
    Welding International, 2009
    Co-Authors: Yoshikazu Suita, Hiroki Sogawa, Yoshiyuki Tsukuda, Shinichiro Shobako, Noboru Terajima, Koichi Masubuchi, Masahiro Ohara, Kazunori Matsushita, Shoji Yamauchi
    Abstract:

    The gas hollow tungsten arc (GHTA) welding experiments on Aluminum Pipe were carried out in a simulated space environment using an aircraft. A vacuum chamber and welding machine for GHTA welding test were placed in the cabin of the aircraft and the 10− 2 G gravity environment was produced by a parabolic flight of the aircraft. The square butt welding joints with non root gap on Aluminum Pipe were made by orbital welding in the vacuum chamber without wire filler metal using DC or DC-pulsed power supply under the 10− 2 and 1 G gravity conditions. The welding phenomenon during the Aluminum GHTA welding recorded in the high-speed video image was analysed and also the macrostructure and mechanical properties of butt weld joints were investigated. The welding experiments under simulated space environment showed that the DC-pulsed GHTA process could make the welding joints without the weld defects such as a lack of fusion, oxide film inclusion and spattering, though throat thickness decreased by the impulsive ar...

Ario Sunar Baskoro - One of the best experts on this subject based on the ideXlab platform.

  • comparison of particle swarm optimization and genetic algorithm for molten pool detection in fixed Aluminum Pipe welding
    International Journal of Technology, 2011
    Co-Authors: Ario Sunar Baskoro, Yasuo Suga, Rui Masuda, Kampus Baru
    Abstract:

    This paper proposes a study on the comparison of particle swarm optimization with genetic algorithm for molten pool detection in fixed Aluminum Pipe welding. The research was conducted for welding of Aluminum alloy Al6063S-T6 with a controlled welding speed and a Charge-couple Device (CCD) camera as vision sensor. Omnivision-based monitoring using a hyperboloidal mirror was used to detect the molten pool. In this paper, we propose an optimized brightness range for detecting the molten pool edge using particle swarm optimization and compare the results to genetic algorithm. The values of the brightness range were applied to the real time control system using fuzzy inference system. Both optimization methods showed good results on the edge detection of the molten pool. The results of experiments with control show the effectiveness of the image processing algorithm and control process.

  • Welding Penetration Control for Aluminum Pipe Welding Using Omnidirectional Vision-based Monitoring of Molten Pool
    QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY, 2009
    Co-Authors: Ario Sunar Baskoro, Masashi Kabutomori, Rui Masuda, Yasuo Suga
    Abstract:

    This paper presents a study on a new method of welding penetration control for Aluminum Pipe in Tungsten Inert Gas (TIG) welding using omnidirectional vision-based monitoring of molten pool. As circumferential butt-welded Pipes and the application of Aluminum alloy in Pipe welding that has been use in various industrial sectors requires new technique of welding monitoring process. For Pipe welding using constant arc current and welding speed, the bead width becomes wider as the circumferential welding of small diameter Pipes progresses. In order to avoid the errors and to obtain the uniform weld bead over the entire circumference of the Pipe, the welding conditions should be controlled. This research studies the intelligent welding process of Aluminum alloy Pipe 6063S-T5 in fixed position using the AC welding machine. The monitoring system used an omnidirectional camera to monitor backside image of molten pool. A new method of image processing algorithm was implemented to process the captured image and to recognize the edge of molten pool. Back bead width as the result of detection was delivered into fuzzy inference system to control welding speed. From the experimental results it shows the effectiveness of the control system that is confirmed by sound weld of experimental results.

  • Monitoring of Backside Image of Molten Pool during Aluminum Pipe Welding Using Vision Sensor
    Materials Science Forum, 2008
    Co-Authors: Ario Sunar Baskoro, Masashi Kabutomori, Yasuo Suga
    Abstract:

    This paper proposes an image sensing system for the TIG (Tungsten Inert Gas) welding process of Aluminum Pipe. In automatic welding process, it is important to recognize the molten pool during the welding process. The use of CCD camera as vision sensor obtains the information of molten pool. The research was conducted for welding of Aluminum alloy Al6063S-T5 with controlled welding speed and the AC welding polarity. Firstly, histogram analysis and range of brightness threshold was established. Secondly, by using the differential value of brightness of molten pool, the edge of molten pool can be detected. Finally, to overcome the unsteady detected edge, the ellipse approximation was used to obtain the image parameters, which are width, length and area. From the experiments it is shown that the recognition of molten pool using vision sensor is an effective method.

  • Automatic Welding System of Aluminum Pipe by Monitoring Backside Image of Molten Pool Using Vision Sensor
    Journal of Solid Mechanics and Materials Engineering, 2008
    Co-Authors: Ario Sunar Baskoro, Masashi Kabutomori, Yasuo Suga
    Abstract:

    An automatic welding system using Tungsten Inert Gas (TIG) welding with vision sensor for welding of Aluminum Pipe was constructed. This research studies the intelligent welding process of Aluminum alloy Pipe 6063S-T5 in fixed position and moving welding torch with the AC welding machine. The monitoring system consists of a vision sensor using a charge-coupled device (CCD) camera to monitor backside image of molten pool. The captured image was processed to recognize the edge of molten pool by image processing algorithm. Neural network model for welding speed control were constructed to perform the process automatically. From the experimental results it shows the effectiveness of the control system confirmed by good detection of molten pool and sound weld of experimental result.

Yoshikazu Suita - One of the best experts on this subject based on the ideXlab platform.

  • Butt Welding Experiment on Aluminum Pipe by Space GHTA Welding Process with Wire Feed under Simulated Space Environment
    JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, 2011
    Co-Authors: Yoshikazu Suita, Hiroki Sogawa, Masahiro Oohara, Hidetoshi Fuke, Yoshiyuki Tsukuda, Shinichiro Shobako, Noboru Terajima, Koichi Masubuchi
    Abstract:

    The Gas Hollow Tungsten Arc (GHTA) welding experiments on Aluminum Pipe were carried out in a simulated space environment and a ground 1G vacuum environment. The square butt welding joints with non root gap on Aluminum Pipe were made by orbital welding with filler metal using DC-pulsed power supply in the vacuum chamber under the 10-2G and 1G gravity conditions. The butt welding phenomenon during the Aluminum DC-pulsed GHTA welding with filler metal recorded in the high-speed video image were analyzed and also the macrostructure and mechanical properties of the butt weld joints were investigated. As the result, it was clarified that the arc discharge and melting-solidifying process during DC-pulsed GHTA welding were insensitive to the gravity condition, because the welding phenomenon greatly receives the effect of the impulsive arc pressure in pulsed current. And also, the GHTA welding experiments under simulated space environment proved that the DC-pulsed GHTA welding process with filler metal could produce the defect-free Aluminum butt welding joints with the enough strength safely.

  • Welding experiments of aluminium Pipe by space GHTA welding in aircraft-borne simulated space environment
    Welding International, 2009
    Co-Authors: Yoshikazu Suita, Hiroki Sogawa, Yoshiyuki Tsukuda, Shinichiro Shobako, Noboru Terajima, Koichi Masubuchi, Masahiro Ohara, Kazunori Matsushita, Shoji Yamauchi
    Abstract:

    The gas hollow tungsten arc (GHTA) welding experiments on Aluminum Pipe were carried out in a simulated space environment using an aircraft. A vacuum chamber and welding machine for GHTA welding test were placed in the cabin of the aircraft and the 10− 2 G gravity environment was produced by a parabolic flight of the aircraft. The square butt welding joints with non root gap on Aluminum Pipe were made by orbital welding in the vacuum chamber without wire filler metal using DC or DC-pulsed power supply under the 10− 2 and 1 G gravity conditions. The welding phenomenon during the Aluminum GHTA welding recorded in the high-speed video image was analysed and also the macrostructure and mechanical properties of butt weld joints were investigated. The welding experiments under simulated space environment showed that the DC-pulsed GHTA process could make the welding joints without the weld defects such as a lack of fusion, oxide film inclusion and spattering, though throat thickness decreased by the impulsive ar...