Unlock instant, AI-driven research and patent intelligence for your innovation.

A Weld Seam Tracking Method for Real-time Deviation Correction with Multi-pole Capacitive Sensing Magnetic Control

A capacitive sensor and magnetic sensing technology, which is applied in the field of automatic tracking, can solve problems such as real-time difficulty, mechanical wear, and complex algorithms, and achieve the effects of ensuring seam tracking accuracy, no mechanical wear, and improving quality and efficiency

Active Publication Date: 2021-01-05
XIANGTAN UNIV
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of the magnetically controlled arc sensors disclosed in the available journal literature is used for deviation correction, and the slow response of the mechanical arm or cross carriage during the welding seam tracking process cannot correct the deviation in time, and there are problems such as mechanical wear that lead to weld seam deviation. Tracking accuracy is not high
[0004] At present, the application number "201710384582.1" published by the China Intellectual Property Office is "Welding torch posture recognition method and device based on multi-pole array capacitive sensor". The algorithm is complex and difficult in real time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Weld Seam Tracking Method for Real-time Deviation Correction with Multi-pole Capacitive Sensing Magnetic Control
  • A Weld Seam Tracking Method for Real-time Deviation Correction with Multi-pole Capacitive Sensing Magnetic Control
  • A Weld Seam Tracking Method for Real-time Deviation Correction with Multi-pole Capacitive Sensing Magnetic Control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, a welding seam tracking method of multi-pole capacitive sensing magnetic control real-time deviation correction of the present invention is as follows figure 1 As shown, the multi-pole capacitive sensors are symmetrically distributed on the left and right sides of the welding torch, and the position information is obtained in real time, and the obtained information is fitted by the cubic spline interpolation algorithm to obtain the arc pre-trajectory; the magnetically controlled arc sensors are symmetrically distributed on the front and rear sides of the welding torch, When there is no deviation, a symmetrical transverse alternating magnetic field is generated to make the arc swing symmetrically to complete welding. When a deviation occurs, the current tracking circuit controls the output switch to change the duty cycle of the output waveform of the waveform generator to change the magnetic field strength, thereby completing real-time deviation correction. ...

Embodiment 2

[0040] Embodiment 2, the current tracking circuit of the present invention is as image 3 As shown, compare the standard current I* with the welding current I and input it into the hysteresis comparator, and then control the switches V1 and V2 through its output to adjust the welding current I, and control the on-off of the switches V3 and V4 to adjust the waveform generator The duty cycle of the output waveform is used to change the magnetic field strength to complete real-time deviation correction; and △I (=I-I*) can be set to control the adjustment accuracy.

Embodiment 3

[0041] Embodiment 3, the multi-electrode capacitive sensor of the present invention is symmetrically distributed on both sides of the welding torch to monitor in real time whether the welding torch is centered on the weld seam. When the data obtained by the capacitance plates on both sides are inconsistent, the position of the welding torch can be adjusted in time.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a welding seam tracking method for multi-electrode capacitive sensor magnetic-control real-time error correction, and the welding seam tracking method is used for real-time error correction in a welding process. The method is characterized in that a multi-electrode capacitive sensor acquires distance information from a capacitor to a workpiece, electric-arc pre-track is fitted through a cubic spline interpolation algorithm after positions of multiple points are obtained, and an obtained height function is converted into a current function as a standard current signal input current tracking circuit; and real-time error correction is accomplished by controlling a pulse duty factor of a magnetic-control electric-arc sensor, so that automatic welding is realized.

Description

Technical field: [0001] The invention relates to the field of automatic tracking, and relates to a welding seam tracking method for real-time deviation correction by multi-pole capacitive sensing and magnetic control. Background technique [0002] Welding automation is an irresistible trend of welding development in today's era. Automatic welding seam tracking is an important part of welding automation. In welding seam tracking robots, welding quality mainly depends on sensing technology, which determines the tracking of welding seams by the entire system Accuracy, while the research on weld automation in my country mainly focuses on the research and design of different types of sensors. Foreign research on welding automation is relatively extensive and carried out relatively early, but foreign research mainly focuses on trajectory planning and control algorithms. [0003] At present, the application number "201210428067.6" published by the China Intellectual Property Office...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/127B23K9/32G06F17/17
Inventor 洪波李伟鹏王英俊海明天屈原缘
Owner XIANGTAN UNIV