DocumentCode :
529574
Title :
A high-density ternary barcode detection system with a fixed period delay method
Author :
Wakaumi, Hiroo
Author_Institution :
Div. of Electron. & Inf. Eng., Tokyo Metropolitan Coll. of Ind. Technol., Tokyo, Japan
fYear :
2010
fDate :
18-21 Aug. 2010
Firstpage :
3140
Lastpage :
3143
Abstract :
A ternary barcode detection system employing a fixed-period delay method is proposed to increase its detection range and detection stability. The system combines the envelope differential detection technique containing nonlinear filtering and fixed-period delay to detect over a longer range and also at higher scanning speed while being simple and capable of handling a great amount of information. The system was demonstrated with its miniaturized circuit and it was confirmed that the detection range of the system for a minimum bar width W = 0.25 mm was 1.8 times that of the conventional count-latch envelope differential technique because of the stable delay achieved by a shift register and the noise suppression by a nonlinear filter. In addition, the system operated at a maximum scanning speed of 8.3 times that of conventional CCD cameras under the practical detection range for W = 0.3 mm. This system is expected to enable the real-time identification of goods on production lines and in automated warehouses.
Keywords :
identification technology; nonlinear filters; production engineering computing; shift registers; warehouse automation; automated warehouses; count-latch envelope differential technique; detection range; detection stability; fixed period delay method; goods identification; noise suppression; nonlinear filter; production lines; shift register; ternary barcode detection system; Cameras; Charge coupled devices; Delay; Noise; Nonlinear filters; Optical sensors; Patents; barcode; laser diode; optical detection system; ternary;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
SICE Annual Conference 2010, Proceedings of
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-7642-8
Type :
conf
Filename :
5602897
Link To Document :
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