Host Computer -based Rotating Arc Signal Processing And System's Research For Intelligent

Seam tracking is a modern welding technology major research direction. By a rotary arc seam tracking system for the study object, the first research the weld direction detection method based on the characteristics harmonic, for welding car provides effective control parameters. In the overall control of seam tracking, the proposed method combining the characteristics harmonic method and integral D-value method respectively control the cross slide frame and welding car. In system's coordination process, the use of Intelligent Agent and Multi Agent as intelligent main block to the control program, to coordinate the each method and control part. The control system has a host computer as a platform, has a PC as hardware base, has serial port for communications channels, makes Visual C++ as programming tools and makes MATLAB for the calculation tool. This paper is based on host computer, designs the signal processing system and research seam tracking system's intelligent.This dissertation found in the weld during the scan, the time-shift have shown the characteristics angle between welding seam direction and the direction of welding, through the Fourier transform, its characteristic vector's the phase angle of harmonic change, this change of perspective is the angle between the welding seam direction and the direction of welding. This angle can be used as a welding carriage control value, to ensure the car's direction and weld seam in the same direction. In this paper, MATLAB as the processing tool, by discrete Fourier transform to detect the angle of the direction of the weld and simulation it, the feasibility is verified in theory.As the need to use the Combination of the integral D-value method and the characteristic harmonic method to get a more complete extraction of characteristic quantities, the seam tracking system establishes the host computer system. Host computer and lower computer division of two parts to achieve combination. In seam tracking control, based on the host computer, intelligent control based on Agent and Multi-Agent are used, to coordinate the work of the various parts, in intelligent control, the Intelligent Agent is on the main block status, realize Agent's autonomy and initiative, and think that the initiative is a basic agent properties.As the PC-performance, and software maturity generic, so host computer is based on PC. Programming is based on Visual C++, taking into account the MATLAB can do matrix operations and complex operations, when in the discrete Fourier transform the Visual C++ call MATLAB engine operation to solve computing instrument.Communication and coordination between host computer and lower computer is through the serial port, serial port hardware is simple, can satisfy the host computer and lower computer's data transmission requirements and long distance connections, and has good stability. The underlying protocol uses serial RS-232 serial protocol; the paper has developed the application layer communication protocol, to ensure the host computer and lower computer understanding each other.