Velocity-controlled shape-tracing system using eight optical sensors

Author

Na, Suck Joo ; Park, Soo Woong

Author_Institution

Dept. of Production Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea

Volume

37

Issue

3

fYear

1988

fDate

9/1/1988 12:00:00 AM

Firstpage

458

Lastpage

461

Abstract

A novel two-dimensional shape-tracing system was developed that uses eight optical sensors and two stepping motors. Each optical sensor, which consists of an optical fiber and a Darlington phototransistor, senses the intensity of the reflected light from drawings to determine the motion pattern of stepping motors. A software velocity-control scheme was also considered, because the shape-tracing system was designed mainly for an automatic plasma arc cutting process. By programming the control software in assembler language, a maximum pulse frequency of 2000 pulse/s, which is equivalent to a 4.8-m/min linear velocity, could be attained in the developed system. The developed shape-tracing system can be applied not only for the plasma arc cutting process, but also for other shape-tracing processes, such as for cutting clothes

Keywords

computerised control; computerised pattern recognition; cutting; fibre optic sensors; phototransistors; process computer control; stepping motors; velocity control; Darlington phototransistor; assembler language; automatic plasma arc cutting; clothes cutting; optical fiber; optical sensors; software velocity-control; stepping motors; two-dimensional shape-tracing system; Assembly systems; Control systems; Frequency; Linear programming; Optical fiber sensors; Optical fibers; Optical sensors; Phototransistors; Plasmas; Velocity control;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.7475

Filename

7475