The research of PSD location method in micro laser welding fields

Qiue Zhang; Rong Zhang; Hua Dong

doi:10.1117/12.868794

9 November 2010 The research of PSD location method in micro laser welding fields

Qiue Zhang, Rong Zhang, Hua Dong

Proceedings Volume 7853, Advanced Sensor Systems and Applications IV; 78531S (2010) https://doi.org/10.1117/12.868794
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

In the field of micro laser welding, besides the special requirement in the parameter of lasers, the locating in welding points accurately is very important. The article adopt position sensitive detector (PSD) as hard core, combine optic system, electric circuits and PC and software processing, confirm the location of welding points. The signal detection circuits adopt the special integrate circuit H-2476 to process weak signal. It is an integrated circuit for high-speed, high-sensitivity optical range finding, which has stronger noiseproof feature, combine digital filter arithmetic, carry out repair the any non-ideal factors, increasing the measure precision. The amplifier adopt programmable amplifier LTC6915. The system adapt two dimension stepping motor drive the workbench, computer and corresponding software processing, make sure the location of spot weld. According to different workpieces to design the clamps. The system on-line detect PSD 's output signal in the moving processing. At the workbench moves in the X direction, the filaments offset is detected dynamic. Analyze the X axes moving sampling signal direction could be estimate the Y axes moving direction, and regulate the Y axes moving values. The workbench driver adopt A3979, it is a stepping motor driver with insert transducer and operate easily. It adapts the requirement of location in micro laser welding fields, real-time control to adjust by computer. It can be content up 20 μm's laser micro welding requirement on the whole. Using laser powder cladding technology achieve inter-penetration welding of high quality and reliability.

Citation Download Citation

Qiue Zhang, Rong Zhang, and Hua Dong "The research of PSD location method in micro laser welding fields", Proc. SPIE 7853, Advanced Sensor Systems and Applications IV, 78531S (9 November 2010); https://doi.org/10.1117/12.868794

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