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A program-controlled trigger and method

A trigger, Schmitt trigger technology, applied in the field of arc welding, to achieve the effect of improving circuit stability and good isolation

Inactive Publication Date: 2017-10-20
GUILIN UNIV OF AEROSPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing technologies cannot meet these characteristics, so it is necessary to solve this problem

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Embodiment Construction

[0038] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples cited are only used to explain the present invention, and are not used to limit the scope of the present invention.

[0039] Such as figure 1 As shown, a program-controlled trigger includes

[0040] Hall current sensor 1, used for butt welding machine current sensing, output voltage sensing signal;

[0041] Signal amplifier 2 is used to amplify the voltage sensing signal;

[0042] Schmitt trigger 3 is used to process the amplified voltage sensing signal and trigger to generate a square wave signal;

[0043] The single-chip microcomputer 4 is used to capture the rising and falling edges of the square wave signal and count, and when the count value reaches the set value, it generates a pulse signal; it is also used to control the tap position of the digital potentiometer 6;

[0044] Output pulse circuit 5, used to output pulse signals to an external...

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Abstract

The invention relates to a program-controlled trigger and a method. A Hall current sensor senses the current of a welding machine and outputs a voltage sensing signal; a signal amplifier amplifies the voltage sensing signal; a Schmitt trigger transmits the amplified voltage The sense signal is processed, triggering and generating a square wave signal; the single-chip microcomputer captures the rising and falling edges of the square wave signal, and counts, and when the count value reaches the set value, a pulse signal is generated; the single-chip microcomputer regulates the tap position of the digital potentiometer; the output pulse The circuit outputs the pulse signal to an external high-speed camera; the digital potentiometer adjusts the positive and negative thresholds of the Schmitt trigger according to the adjusted tap position, and performs program control on the threshold and preamplification. Compared with the prior art, the invention has stable operation, programmable threshold and preamplification, and can adapt to different welding environments.

Description

Technical field [0001] The invention relates to the technical field of arc welding, in particular to a program-controlled trigger and method applied to an electric welding machine to capture the instant snapshot of electric welding. Background technique [0002] CO 2 Gas-shielded welding is one of the most commonly used gas-shielded welding methods in the welding process. Because of its low cost and easy quality control, it is widely used. Droplet short-circuit transfer welding is CO 2 A droplet transfer method often occurs in gas shielded welding: arc welding heats and melts the end of the welding wire to form a droplet that hangs on the end of the wire. After the droplet contacts the molten pool on the workpiece (so-called short circuit), The molten metal of the welding wire is transferred to the weld. The image analysis of the droplet short-circuit transfer welding process has far-reaching significance for improving the stability of the welding arc, improving the weld formati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042B23K9/10
CPCB23K9/1062
Inventor 蒋志勇刘晓刚覃科
Owner GUILIN UNIV OF AEROSPACE TECH