Double DSP built-in control system for visual feedback during soldering process

A welding process and visual feedback technology, which is applied in the field of dual DSP embedded welding process visual feedback control system, can solve the problems of complex system structure, precision and speed that cannot meet the requirements of high-quality welding feedback control, and can not be realized. Small system size and system architecture complexity, improve data processing speed and dynamic response performance, realize the effect of welding process monitoring

Inactive Publication Date: 2008-09-03
TSINGHUA UNIV +1
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Problems solved by technology

[0009] To sum up, the existing welding process visual sensing system has the following deficiencies: (1) Generally, a desktop industrial control computer is used for image acquisition and processing, with complex architecture and poor accessibility; (2) Single DSP computing architecture, The calculation speed is slow, and it ca

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  • Double DSP built-in control system for visual feedback during soldering process
  • Double DSP built-in control system for visual feedback during soldering process
  • Double DSP built-in control system for visual feedback during soldering process

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[0025] The specific embodiments of the present invention will be described below in conjunction with the drawings.

[0026] Such as figure 1 As shown, the patent of the present invention includes a DSP image processing module, a DSP feedback control module, an analog video encoding module, a USB control module, and a video interface module. Among them, the DSP image processing module uses TI's high-performance image processing chip TMS320DM642, and two 16M RAMs are expanded on the CE0 of its EMIF bus space to temporarily store the massive image digital signals obtained from the video port. At the same time, a 4M FLASH memory was expanded on the CE1 space of its EMIF. FLASH memory is used to save the algorithm of image processing program after power-off, and realize the self-loading of the program after DSP is powered on, so as to separate from the upper computer to realize tracking. The DSP image processing module leads out all the video interfaces (three in total) of TMS320DM642...

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Abstract

The invention discloses a double DSP embedded type welding process visual feedback control system for welding seam tracking and welding quality control in welding automation, comprising a DSP image processing module, a DSP feedback control module, a power and reset module, a visual interface module, an analog video coding module and a USB control module. The DSP image processing module extracts the eigenvalues of a welding region image transmitted from the video interface module and transmits to the DSP feedback control module, the DSP feedback control module outputs corresponding signals according to the eigenvalues, and finishes close-loop control of welding seam tracking and welding quality. By this invention, welding seam tracking and welding seam shaping control can be carried out without a host computer.

Description

technical field [0001] The patent of the invention belongs to the field of welding equipment, and specifically relates to a dual-DSP embedded welding process visual feedback control system for realizing welding process automation, welding process monitoring, welding seam tracking and real-time control of welding seam formation. Background technique [0002] The visual sensor based on the industrial CCD camera is widely used in the image monitoring of the welding process, weld seam tracking and weld seam forming closed-loop control because of its large amount of information, high measurement accuracy, and no contact with the workpiece. Vision sensors are not easily affected by magnetic deflection or wire bending during use, but they need to overcome interference such as arc light, smoke, and spatter during welding. In addition, pattern recognition and real-time requirements for features such as grooves, arcs, and molten pools have put forward higher requirements for image pro...

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Application Information

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IPC IPC(8): G05B19/048G05B19/418
Inventor 孙振国黄操刘鹏飞陈强徐绪炯
Owner TSINGHUA UNIV
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