Magnetic grooved bar-code recognition system with slant MR sensor

Author

Wakaumi, H. ; Ajiki, H. ; Hankui, E. ; Nagasawa, C.

Author_Institution

Dept. of Electron. & Inf. Eng., Tokyo Metropolitan Coll. of Technol., Japan

Volume

147

Issue

3

fYear

2000

fDate

5/1/2000 12:00:00 AM

Firstpage

131

Lastpage

136

Abstract

For goods management in dirty factories or in outdoor environments, a scanner with a novel slant-element magnetoresistive (MR) sensor, which enables highly sensitive detection and increased detection height, has been developed. This sensor is effective for recognising a bar-code at a nearly 0.2 mm higher detection height than in a conventional single MR sensor. The usable effective detection height of 0.5 mm was obtained for a groove bar-code with two different groove depths using this sensor. It is shown theoretically that this sensor increases detection sensitivity with an increase in the number of MR sensor elements without sacrificing bar-code detection resolution

Keywords

bar codes; magnetic sensors; magnetoresistive devices; mark scanning equipment; 0.52 mm; bar-code detection resolution; detection height; detection sensitivity; dirty factories; effective detection height; goods management; groove bar-code; groove depths; magnetic grooved bar-code recognition system; outdoor environment; scanner; slant MR sensor; slant-element magnetoresistive sensor;

fLanguage

English

Journal_Title

Science, Measurement and Technology, IEE Proceedings -

Publisher

iet

ISSN

1350-2344

Type

jour

DOI

10.1049/ip-smt:20000369

Filename

850597