Trigger, trigger system and trigger method

Abstract

The invention relates to a trigger, a trigger system and a trigger method. The trigger comprises a hall current sensor, an analog-digital converter and a single chip microcomputer, wherein the hall current sensor is used for converting a welder current signal into a voltage sensing signal, the analog-digital converter is used for carrying out analog-digital conversion on the voltage sensing signalfor generating a digital voltage sensing signal, and the single chip microcomputer is used for acquiring the rising edge pulse width, the falling edge pulse width and the current waveform period of the current waveform corresponding to the digital voltage sensing signal, and generating a first trigger signal through the rising edge pulse width and the current waveform period of the current waveform and the first preset delay time so as to trigger molten pool shooting through a high-speed camera, or generating a second trigger signal through the falling edge pulse width and the current waveform period of the current waveform and the second preset delay time so as to trigger welding seam shooting through the high-speed camera, and then the welding stability or the welding quality conditionis determined.

Description

technical field [0001] The invention relates to the technical field of arc welding, in particular to a trigger and a trigger method applied to an electric welding machine for shooting molten pool images and weld seam images. Background technique [0002] During arc welding, the arc welding monitoring system needs to take a clear image of the molten pool to determine the stability of the welding, and take pictures of the entire weld to determine the welding quality. Generally, an arc welding monitoring system includes a high-speed camera, a data acquisition card, a computer system and image processing software. The shutter opening trigger of the high-speed camera can be generated by the trigger circuit of the high-speed camera itself. However, in the prior art, when taking images of the molten pool, due to the presence of arc lights, smoke and metal powder splashes, etc., the captured images of the molten pool are noisy and blurred. In addition, in the prior art, the trigger...

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention provides a trigger, a trigger system and a trigger method to solve the problem of blurred images of the molten pool and the inability to capture the entire weld seam and obtain the quality of the weld seam

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