A High-Quality Optical Sound Recording System Using a Scanned Laser Beam

SMPTE Journal ◽  
1980 ◽  
Vol 89 (2) ◽  
pp. 95-97 ◽  
Author(s):  
T. Taneda ◽  
Y. Sugiura ◽  
T. Motoki ◽  
G. Oishi ◽  
H. Miyatera ◽  
...  
Keyword(s):  
Laser Beam ◽  
Recording System ◽  
Sound Recording ◽  
High Quality

Evaluation of the Forest Bird Community in the Breeding Season by using the Sound Recording System

2018 ◽  
Vol 32 (1) ◽  
pp. 39-46
Author(s):  
Seung-Hwa Yoo ◽  
◽  
Hyun-Jin Han ◽  
Dong-Won Kim ◽  
Woo-Young Joo
Keyword(s):  
Breeding Season ◽  
Bird Community ◽  
Recording System ◽  
Sound Recording ◽  
Forest Bird

scholarly journals APPLICATION OF ADDITIVE TECHNOLOGIES IN MODERN FOUNDRY PRODUCTION

2021 ◽  
Vol 117 (2) ◽  
pp. 20-27
Author(s):  
Zhannur Begendikova ◽  
Amina Bukayeva
Keyword(s):  
Laser Beam ◽  
New Products ◽  
Machine Building ◽  
Global Market ◽  
Model Material ◽  
Additive Technologies ◽  
The Body ◽  
Cad Model ◽  
High Quality ◽  
Building Products

The paper studies and analyzes the use of additive technologies in modern foundry production, determining their innovative development to create new products with high quality, reliability and determining its competitiveness in the world market of machine-building products. The essence of SLS-technology is defined as follows: model material - polystyrene powder with particle size of 50-150 microns - is rolled by a special roller on the working platform installed in a sealed chamber with an inert gas atmosphere - nitrogen. The laser beam "runs" where the computer "sees" the "body" in the given section of the CAD-model, as if "shading" the section of the part, as it is done by the constructor with a pencil on the drawing. In this case the laser beam is a source of heat, under the influence of which sintering of polystyrene particles takes place (working temperature - about 120°С). SLA, Polyjet and DLP technologies are the most widespread for metal casting. The first method involves sequential "running" of the laser beam over the entire surface of the layer to be formed where the model "body" is in the cross section. The second method of curing is performed by a beam in the form of a line in the process of layer formation due to radiation from a controlled ultraviolet lamp. The third way implies illumination of the whole layer simultaneously by creating the so-called mask - a "photo" of the current CAD-model section. Thus, additive technologies in modern foundry production have radically reduced labor intensity and costs of creating new products, which have high quality and reliability indicators and determine their competitiveness in the global market of machine-building products.

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