Experimental investigation on the properties of fluids subjected to high power ultrasonic waves: Identification of perturbing parameters

2011 ◽  
Author(s):  
D. Samah ◽  
J-F. Rouchon ◽  
P. Tierce ◽  
B. Ratsimba ◽  
H. Delmas
Keyword(s):  
Experimental Investigation ◽  
High Power ◽  
Ultrasonic Waves ◽  
Power Ultrasonic

Experimental Investigation of Limits to Slow Axis Beam Quality in High Power Broad Area Diode Lasers

2014 ◽  
Author(s):  
M. Winterfeldt ◽  
P. Crump ◽  
H. Wenzel ◽  
G. Erbert ◽  
G. Trankle
Keyword(s):  
Experimental Investigation ◽  
High Power ◽  
Beam Quality ◽  
Diode Lasers ◽  
Broad Area ◽  
Slow Axis

Experimental Investigation of High Power Erbium–Ytterbium Co-doped Double Clad Fibre Laser

2004 ◽  
Vol 21 (12) ◽  
pp. 2426-2428 ◽  
Author(s):  
Li Li-Jun ◽  
Feng Xin-Huan ◽  
Liu Yan-Ge ◽  
Li Yao ◽  
Yuan Shu-Zhong ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
High Power ◽  
Fibre Laser ◽  
Co Doped

Automatic Frequency-Tracking Control for Ultrasound Welding System

2011 ◽  
Vol 204-210 ◽  
pp. 2041-2044
Author(s):  
Kao Feng Yarn ◽  
King Kung Wu ◽  
Kai Hsing Ma ◽  
Wen Chung Chang
Keyword(s):  
High Power ◽  
Tracking Control ◽  
Control Method ◽  
Ultrasonic Welding ◽  
Automatic Frequency ◽  
Frequency Tracking ◽  
Power Ultrasonic ◽  
Fpga Chip ◽  
Working Frequency ◽  
Welding System

A new frequency-tracking control method to catch the optimal working frequency for the high power ultrasonic welding system is proposed. In a high power ultrasonic resonant system, the induced high temperature will change the working frequency. Therefore, the proposed control method to track the optimal working frequency becomes very attractive and important. This control method is practically implemented by a FPGA chip which basically includes two logic circuits. One logic circuit is to find the optimal working frequency automatically and the other one is to adjust the working frequency by detecting the working current simultaneously. Experimental results exhibit the new method can effectively control and track frequency for high power ultrasonic welding system.

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