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CO₂ 激光 lap 焊接过程中穿透深度的闭环控制。

Closed loop control of penetration depth during CO₂ laser lap welding processes.

机构信息

CNR-IFN Institute for Photonics and Nanotechnologies, UOS Bari, 70126 Bari, Italy.

出版信息

Sensors (Basel). 2012;12(8):11077-90. doi: 10.3390/s120811077. Epub 2012 Aug 9.

DOI:10.3390/s120811077
PMID:23112646
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3472874/
Abstract

In this paper we describe a novel spectroscopic closed loop control system capable of stabilizing the penetration depth during laser welding processes by controlling the laser power. Our novel approach is to analyze the optical emission from the laser generated plasma plume above the keyhole, to calculate its electron temperature as a process-monitoring signal. Laser power has been controlled by using a quantitative relationship between the penetration depth and the plasma electron temperature. The sensor is able to correlate in real time the difference between the measured electron temperature and its reference value for the requested penetration depth. Accordingly the closed loop system adjusts the power, thus maintaining the penetration depth.

摘要

本文介绍了一种新颖的光谱闭环控制系统，该系统能够通过控制激光功率来稳定激光焊接过程中的穿透深度。我们的新方法是分析激光在匙孔上方产生的等离子体羽辉的光发射，以计算其电子温度作为过程监测信号。通过使用穿透深度和等离子体电子温度之间的定量关系来控制激光功率。传感器能够实时关联测量的电子温度与其参考值之间的差值，以达到请求的穿透深度。相应地，闭环系统会调整功率，从而保持穿透深度。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e219/3472874/3bada0ad3aff/sensors-12-11077f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e219/3472874/e70d4796492a/sensors-12-11077f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e219/3472874/79cc7c62b1c8/sensors-12-11077f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e219/3472874/f6de20e30339/sensors-12-11077f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e219/3472874/1d90cb0889cf/sensors-12-11077f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e219/3472874/0c0f861f08f5/sensors-12-11077f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e219/3472874/72bca8131c80/sensors-12-11077f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e219/3472874/3bada0ad3aff/sensors-12-11077f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e219/3472874/e70d4796492a/sensors-12-11077f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e219/3472874/79cc7c62b1c8/sensors-12-11077f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e219/3472874/f6de20e30339/sensors-12-11077f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e219/3472874/1d90cb0889cf/sensors-12-11077f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e219/3472874/0c0f861f08f5/sensors-12-11077f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e219/3472874/72bca8131c80/sensors-12-11077f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e219/3472874/3bada0ad3aff/sensors-12-11077f7.jpg

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本文引用的文献

1
A real-time spectroscopic sensor for monitoring laser welding processes.一种用于监测激光焊接过程的实时光谱传感器。
Sensors (Basel). 2009;9(5):3376-85. doi: 10.3390/s90503376. Epub 2009 May 7.
2
Plasma plume oscillations monitoring during laser welding of stainless steel by discrete wavelet transform application.采用离散小波变换监测不锈钢激光焊接过程中的等离子体羽流振荡。
Sensors (Basel). 2010;10(4):3549-61. doi: 10.3390/s100403549. Epub 2010 Apr 8.
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Focus control system for laser welding.激光焊接聚焦控制系统。
用于控制和监测带束流摆动的电子束焊接的等离子体电荷电流。
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Optical techniques for real-time penetration monitoring for laser welding.用于激光焊接实时熔深监测的光学技术。
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