Data collecting system of pipe arc acoustic emission characteristics

As the arc sound signal contains plenty of welding information which is an important source signal for welding quality control, arc acoustic emission signal (AAES)propagated in pipeline structure is low-noise, and AAES collecting system is designed for pipe TIG welding.The hardware sy stem consists of sensor, signal adaptor circuit, data collecting card and industrial workstation. Based on virtual instrument programming software (LabVIEW), the high speed AAES collecting software system is designed by means of triggering interrupt, packaging function modules and calling dynamic link programs of the hardware driver.The AAES experimental results show that the system not only correctly collects arc voltage, welding current and AAES at high speed synchronously, but also displays the real-time graph of the signals.The whole AAES collecting platform will lay the foundation for further studying on the arc acoustic emission mechanism in the pipe TIG welding.